/* ============================================
   CSS CUSTOM PROPERTIES
   ============================================ */
:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #171717;
    --bg-elevated: #1c1c1c;
    --bg-hover: #242424;
    --bg-active: #2a2a2a;
    --text-primary: #ececec;
    --text-secondary: #8b8b8b;
    --text-tertiary: #555555;
    --accent: #0070f3;
    --accent-hover: #005cc5;
    --accent-glow: rgba(0, 112, 243, 0.12);
    --accent-border: rgba(0, 112, 243, 0.25);
    --user-msg-bg: rgba(0, 112, 243, 0.08);
    --user-msg-border: rgba(0, 112, 243, 0.15);
    --input-bg: #111111;
    --input-border: rgba(255, 255, 255, 0.08);
    --code-bg: #0c0c0c;
    --code-header: #161616;
    --border: rgba(255, 255, 255, 0.06);
    --border-light: rgba(255, 255, 255, 0.1);
    --border-medium: rgba(255, 255, 255, 0.12);
    --sidebar-bg: #0e0e0e;
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --glass-bg: rgba(17, 17, 17, 0.85);
    --glass-border: rgba(255, 255, 255, 0.06);
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.2);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
    --shadow-xl: 0 16px 64px rgba(0,0,0,0.6);
    --radius-xs: 6px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
    --container-max: 860px;
}

/* ============================================
   LIGHT THEME
   ============================================ */
body.light-theme {
    --bg-primary: #fafafa;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #eeeeee;
    --bg-elevated: #ffffff;
    --bg-hover: #e8e8e8;
    --bg-active: #e0e0e0;
    --text-primary: #0a0a0a;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --accent-glow: rgba(0, 112, 243, 0.06);
    --accent-border: rgba(0, 112, 243, 0.2);
    --user-msg-bg: rgba(0, 112, 243, 0.05);
    --user-msg-border: rgba(0, 112, 243, 0.12);
    --input-bg: #ffffff;
    --input-border: rgba(0, 0, 0, 0.08);
    --code-bg: #f6f8fa;
    --code-header: #eaeef2;
    --border: rgba(0, 0, 0, 0.06);
    --border-light: rgba(0, 0, 0, 0.08);
    --border-medium: rgba(0, 0, 0, 0.12);
    --sidebar-bg: #f5f5f5;
    --glass-bg: rgba(255, 255, 255, 0.9);
    --glass-border: rgba(0, 0, 0, 0.06);
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.1);
    --shadow-xl: 0 16px 64px rgba(0,0,0,0.12);
}

/* ============================================
   RESET & BASE
   ============================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { height: 100%; }
body {
    height: 100%;
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    transition: background-color var(--transition), color var(--transition);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow: hidden;
}

/* ============================================
   SCROLLBAR
   ============================================ */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }

/* ============================================
   HEADER
   ============================================ */
.header {
    padding: 0 1.5rem;
    height: 52px;
    min-height: 52px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    position: sticky;
    top: 0;
    z-index: 50;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--glass-border);
    flex-shrink: 0;
}
.header-left { display: flex; align-items: center; gap: 10px; }
.header-title { font-size: 0.875rem; font-weight: 600; letter-spacing: -0.02em; }
.header-badge {
    font-size: 0.58rem;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: var(--radius-full);
    background: var(--accent-glow);
    color: var(--accent);
    border: 1px solid var(--accent-border);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* ============================================
   ICON BUTTON
   ============================================ */
.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}
.icon-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.icon-btn:active { transform: scale(0.95); }
.icon-btn svg, .icon-btn .lucide { width: 20px; height: 20px; }

/* ============================================
   OVERLAY
   ============================================ */
.overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 90;
    opacity: 0;
    transition: opacity var(--transition-slow) ease;
}
.overlay.show { display: block; opacity: 1; }

/* ============================================
   SIDEBAR
   ============================================ */
.sidebar {
    position: fixed;
    top: 0; left: 0;
    width: 300px;
    height: 100%;
    background: var(--sidebar-bg);
    z-index: 100;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--glass-border);
    box-shadow: var(--shadow-xl);
    transform: translateX(-100%);
    transition: transform var(--transition-slow) cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform;
    overflow: hidden;
}
.sidebar.open { transform: translateX(0); }

.sidebar-header {
    padding: 0 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
    height: 52px;
    min-height: 52px;
    flex-shrink: 0;
}
.sidebar-header h2 { font-size: 0.875rem; font-weight: 600; letter-spacing: -0.01em; }
.sidebar-header .icon-btn svg, .sidebar-header .icon-btn .lucide { width: 18px; height: 18px; }

.sidebar-layout {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
}

.sidebar-conversations {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar-conversations-inner {
    padding: 0.625rem 0.625rem 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.sidebar-settings {
    flex-shrink: 0;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    min-height: 0;
}

/* Settings accordion trigger */
.settings-accordion-btn {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.65rem 1rem;
    background: transparent;
    border: none;
    border-bottom: 1px solid transparent;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.82rem;
    font-family: inherit;
    font-weight: 500;
    transition: all var(--transition-fast);
    width: 100%;
    text-align: left;
    flex-shrink: 0;
    min-height: 44px;
}
.settings-accordion-btn:hover { background: var(--bg-hover); }
.settings-accordion-btn.open  { border-bottom-color: var(--border); }

.settings-accordion-left { display: flex; align-items: center; gap: 9px; }

.settings-accordion-icon {
    width: 24px; height: 24px;
    border-radius: var(--radius-xs);
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    flex-shrink: 0;
}
.settings-accordion-icon svg, .settings-accordion-icon .lucide { width: 12px !important; height: 12px !important; }
.settings-accordion-btn.open .settings-accordion-icon {
    background: var(--accent-glow);
    border-color: var(--accent-border);
    color: var(--accent);
}

.settings-chevron {
    width: 14px !important; height: 14px !important;
    color: var(--text-tertiary);
    transition: transform var(--transition);
    flex-shrink: 0;
}
.settings-chevron.rotated { transform: rotate(180deg); }

.settings-accordion-body {
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.32s cubic-bezier(0.4, 0, 0.2, 1);
}
.settings-accordion-body.open { max-height: 420px; }

.settings-accordion-inner {
    padding: 0.4rem 0.625rem 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 1px;
    border-bottom: 1px solid var(--border);
}

/* Sidebar buttons */
.sidebar-btn {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 7px 9px;
    border-radius: var(--radius-sm);
    border: none;
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.8rem;
    font-family: inherit;
    font-weight: 400;
    transition: all var(--transition-fast);
    text-align: left;
    width: 100%;
    line-height: 1.4;
}
.sidebar-btn:hover { background: var(--bg-hover); }
.sidebar-btn:active { background: var(--bg-active); transform: scale(0.99); }
.sidebar-btn svg, .sidebar-btn .lucide {
    width: 14px !important; height: 14px !important;
    color: var(--text-secondary);
    flex-shrink: 0;
}
.sidebar-btn.danger-btn { color: var(--error); }
.sidebar-btn.danger-btn svg, .sidebar-btn.danger-btn .lucide { color: var(--error); opacity: 0.7; }
.sidebar-btn.danger-btn:hover { background: rgba(239, 68, 68, 0.06); }

.new-chat-btn {
    background: var(--accent-glow) !important;
    border: 1px solid var(--accent-border) !important;
    margin-bottom: 4px;
}
.new-chat-btn span { color: var(--accent) !important; font-weight: 500; }
.new-chat-btn svg, .new-chat-btn .lucide { color: var(--accent) !important; }

.sidebar-section-title {
    font-size: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-tertiary);
    padding: 8px 9px 3px;
}

/* Chat history list */
.chat-history-list { display: flex; flex-direction: column; gap: 1px; }

.chat-history-item {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 7px 9px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.79rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    border: none;
    background: transparent;
    text-align: left;
    width: 100%;
    font-family: inherit;
    min-height: 34px;
    position: relative;
}
.chat-history-item:hover  { background: var(--bg-hover); color: var(--text-primary); }
.chat-history-item.active { background: var(--accent-glow); color: var(--accent); }

.chat-item-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.4;
    width: 14px; height: 14px;
}
.chat-history-item.active .chat-item-icon { opacity: 1; }
.chat-item-icon svg, .chat-item-icon .lucide { width: 12px !important; height: 12px !important; display: block; }

.chat-title {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
    font-size: 0.79rem;
    line-height: 1.4;
}

/* ── Delete button — the critical fix ── */
.chat-delete {
    opacity: 0;
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
    width: 22px; height: 22px;
    /* Ensure it sits on top and receives pointer events */
    position: relative;
    z-index: 2;
}
.chat-history-item:hover  .chat-delete { opacity: 1; }
.chat-history-item.active .chat-delete { opacity: 0.4; }
.chat-history-item.active:hover .chat-delete { opacity: 1; }
.chat-delete:hover { color: var(--error); background: rgba(239, 68, 68, 0.1); }
.chat-delete svg, .chat-delete .lucide { width: 11px !important; height: 11px !important; display: block; pointer-events: none; }

/* Config panel */
.config-panel {
    padding: 10px 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-shrink: 0;
}
.config-panel-header { display: flex; align-items: center; justify-content: space-between; }
.config-panel-title { font-weight: 600; font-size: 0.78rem; }
.config-status-dot {
    width: 7px; height: 7px;
    border-radius: 50%;
    transition: background var(--transition);
    flex-shrink: 0;
}
.config-field { display: flex; flex-direction: column; gap: 4px; }
.config-label {
    font-size: 0.64rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.config-input {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    color: var(--text-primary);
    padding: 7px 9px;
    border-radius: var(--radius-xs);
    font-size: 0.76rem;
    font-family: var(--font-mono);
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
    width: 100%;
}
.config-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.config-input::placeholder { color: var(--text-tertiary); font-family: var(--font-sans); font-size: 0.72rem; }
.config-actions { display: flex; gap: 6px; }

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    flex: 1;
    padding: 7px 14px;
    border-radius: var(--radius-xs);
    border: 1px solid var(--border-light);
    background: var(--bg-elevated);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.78rem;
    font-weight: 500;
    font-family: inherit;
    transition: all var(--transition-fast);
}
.btn:hover { background: var(--bg-hover); }
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--accent); color: white; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-danger { color: var(--error); border-color: rgba(239, 68, 68, 0.2); background: transparent; }
.btn-danger:hover { background: rgba(239, 68, 68, 0.08); }
.btn-danger-solid { background: var(--error); color: white; border-color: var(--error); }
.btn-danger-solid:hover { background: #dc2626; }

/* ============================================
   INFO BUTTON
   ============================================ */
.info-btn {
    background: transparent;
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    cursor: pointer;
    width: 16px; height: 16px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.6rem;
    font-weight: 700;
    font-family: var(--font-sans);
    transition: all var(--transition-fast);
    position: relative;
    flex-shrink: 0;
}
.info-btn:hover { background: var(--accent-glow); border-color: var(--accent-border); color: var(--accent); }
.info-popup {
    display: none;
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-elevated);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-size: 0.72rem;
    font-weight: 400;
    color: var(--text-secondary);
    line-height: 1.55;
    width: 240px;
    box-shadow: var(--shadow-lg);
    z-index: 200;
    text-align: left;
    pointer-events: none;
}
.info-popup::after {
    content: '';
    position: absolute;
    top: 100%; left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: var(--border-light);
}
.info-btn:hover .info-popup { display: block; }

/* ============================================
   TOAST
   ============================================ */
.status-toast {
    position: fixed;
    bottom: 90px; left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border-light);
    padding: 9px 18px;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 300;
    opacity: 0;
    pointer-events: none;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    white-space: nowrap;
}
.status-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.status-toast.success { border-color: rgba(34, 197, 94, 0.3); }
.status-toast.error   { border-color: rgba(239, 68, 68, 0.3); }

/* ============================================
   RECONNECT BANNER
   ============================================ */
.reconnect-banner {
    display: none;
    position: fixed;
    top: 52px; left: 0; right: 0;
    background: rgba(245, 158, 11, 0.1);
    border-bottom: 1px solid rgba(245, 158, 11, 0.2);
    padding: 7px 16px;
    font-size: 0.78rem;
    color: var(--warning);
    text-align: center;
    z-index: 49;
    align-items: center;
    justify-content: center;
    gap: 8px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
.reconnect-banner.show { display: flex; }
.reconnect-banner svg, .reconnect-banner .lucide { width: 13px !important; height: 13px !important; }
.reconnect-btn {
    background: rgba(245, 158, 11, 0.15);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: var(--warning);
    cursor: pointer;
    padding: 2px 10px;
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 500;
    font-family: inherit;
    transition: all var(--transition-fast);
}
.reconnect-btn:hover { background: rgba(245, 158, 11, 0.25); }

/* ============================================
   DELETE CONFIRM MODAL
   ============================================ */
.delete-modal-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.65);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 200;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}
.delete-modal-backdrop.open { display: flex; }

.delete-modal {
    background: var(--bg-elevated);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-xl);
    padding: 2rem 1.75rem 1.5rem;
    width: 100%;
    max-width: 360px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    box-shadow: var(--shadow-xl);
    animation: panelSlideUp 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.delete-modal-icon {
    width: 48px; height: 48px;
    border-radius: var(--radius-md);
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.2);
    display: flex; align-items: center; justify-content: center;
    color: var(--error);
    margin-bottom: 4px;
}
.delete-modal-icon svg, .delete-modal-icon .lucide { width: 22px !important; height: 22px !important; }

.delete-modal-title {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    text-align: center;
}
.delete-modal-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-align: center;
    line-height: 1.5;
    margin-bottom: 6px;
}
.delete-modal-actions {
    display: flex;
    gap: 8px;
    width: 100%;
    margin-top: 4px;
}

/* ============================================
   WELCOME SCREEN
   ============================================ */
.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    padding: 2rem;
    text-align: center;
    gap: 18px;
    animation: fadeIn 0.6s ease;
    min-height: 0;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

.welcome-logo {
    width: 52px; height: 52px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--accent), #4dabf7);
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 8px 32px rgba(0, 112, 243, 0.2);
}
.welcome-title {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.035em;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.welcome-subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
    max-width: 500px;
    line-height: 1.6;
}
.quick-actions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    max-width: 600px;
    width: 100%;
    margin-top: 4px;
}
.quick-action-btn {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 11px 13px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.8rem;
    font-family: inherit;
    text-align: left;
    transition: all var(--transition);
    line-height: 1.4;
}
.quick-action-btn:hover {
    background: var(--bg-hover);
    border-color: var(--border-medium);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}
.quick-action-btn:active { transform: translateY(0); }
.qa-icon  { font-size: 1rem; flex-shrink: 0; margin-top: 1px; }
.qa-text  { display: flex; flex-direction: column; gap: 2px; }
.qa-title { font-weight: 500; font-size: 0.8rem; }
.qa-desc  { font-size: 0.7rem; color: var(--text-secondary); }

/* ============================================
   CHAT AREA
   ============================================ */
.chat-wrapper {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    scroll-behavior: smooth;
    display: flex;
    flex-direction: column;
    min-height: 0;
}
.chat-container {
    flex: 1;
    padding: 1.5rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: var(--container-max);
    margin: 0 auto;
    width: 100%;
}

/* ============================================
   MESSAGES
   ============================================ */
.message {
    display: flex;
    width: 100%;
    animation: msgIn 0.3s ease;
}
@keyframes msgIn {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* User bubble */
.message.user { justify-content: flex-end; }
.message.user .message-bubble {
    background: var(--user-msg-bg);
    border: 1px solid var(--user-msg-border);
    max-width: 80%;
    padding: 11px 16px;
    border-radius: var(--radius-lg) var(--radius-lg) 4px var(--radius-lg);
    word-wrap: break-word;
    font-size: 0.875rem;
    line-height: 1.65;
}

/* Bot bubble */
.message.bot { justify-content: flex-start; gap: 11px; align-items: flex-start; }
.bot-avatar {
    width: 28px; height: 28px; min-width: 28px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--accent), #4dabf7);
    display: flex; align-items: center; justify-content: center;
    margin-top: 2px;
    flex-shrink: 0;
}
.bot-avatar svg { color: white; width: 14px; height: 14px; }
.message.bot .bot-content {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
    max-width: 100%;
}
.message.bot .message-bubble {
    padding: 0;
    font-size: 0.875rem;
    line-height: 1.75;
    overflow-wrap: break-word;
    word-break: break-word;
    width: 100%;
}
.message.bot .message-bubble p         { margin: 0 0 0.65em 0; }
.message.bot .message-bubble p:last-child { margin-bottom: 0; }
.message.bot .message-bubble ul,
.message.bot .message-bubble ol        { margin: 0.4em 0; padding-left: 1.4em; }
.message.bot .message-bubble li        { margin-bottom: 0.2em; }
.message.bot .message-bubble strong    { color: var(--text-primary); }
.message.bot .message-bubble a         { color: var(--accent); text-decoration: none; }
.message.bot .message-bubble a:hover   { text-decoration: underline; }
.message.bot .message-bubble blockquote {
    border-left: 3px solid var(--accent);
    margin: 0.65em 0;
    padding: 0.4em 0.9em;
    background: var(--bg-secondary);
    border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
    color: var(--text-secondary);
}
.message.bot .message-bubble table {
    border-collapse: collapse;
    width: 100%;
    margin: 0.65em 0;
    font-size: 0.8rem;
    overflow-x: auto;
    display: block;
}
.message.bot .message-bubble th,
.message.bot .message-bubble td        { border: 1px solid var(--border-light); padding: 7px 11px; text-align: left; }
.message.bot .message-bubble th        { background: var(--bg-tertiary); font-weight: 600; }

/* Message actions */
.message-actions {
    display: flex;
    gap: 1px;
    margin-top: 6px;
    opacity: 0;
    transition: opacity var(--transition);
}
.message.bot:hover .message-actions { opacity: 1; }
.msg-action-btn {
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 4px 6px;
    border-radius: var(--radius-xs);
    display: flex; align-items: center; justify-content: center;
    transition: all var(--transition-fast);
    gap: 4px;
    font-size: 0.68rem;
    font-family: inherit;
}
.msg-action-btn:hover  { background: var(--bg-hover); color: var(--text-primary); }
.msg-action-btn:active { transform: scale(0.92); }
.msg-action-btn.copied { color: var(--success); }
.msg-action-btn svg, .msg-action-btn .lucide { width: 12px !important; height: 12px !important; }

/* ============================================
   CODE BLOCKS
   ============================================ */
.code-wrapper {
    background: var(--code-bg);
    border-radius: var(--radius-md);
    width: 100%;
    margin: 0.65rem 0;
    overflow: hidden;
    border: 1px solid var(--border);
    display: block;
}
.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--code-header);
    padding: 6px 14px;
    font-size: 0.7rem;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    border-bottom: 1px solid var(--border);
}
.code-lang { display: flex; align-items: center; gap: 6px; }
.code-lang-dot { width: 5px; height: 5px; border-radius: 50%; background: var(--accent); opacity: 0.6; }
.copy-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.7rem;
    display: flex; align-items: center; gap: 4px;
    padding: 2px 9px;
    border-radius: var(--radius-xs);
    font-family: var(--font-sans);
    transition: all var(--transition-fast);
}
.copy-btn:hover  { background: var(--bg-hover); color: var(--text-primary); border-color: var(--border-medium); }
.copy-btn:active { transform: scale(0.96); }
.copy-btn svg, .copy-btn .lucide { width: 11px !important; height: 11px !important; }
.copy-btn.copied { color: var(--success); border-color: rgba(34, 197, 94, 0.3); }

pre { margin: 0; padding: 1rem 1.1rem; overflow-x: auto; width: 100%; }
pre code.hljs {
    background: transparent !important;
    padding: 0 !important;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.65;
    white-space: pre;
    display: block;
    width: 100%;
}
.message.bot .message-bubble code:not(.hljs) {
    background: var(--bg-tertiary);
    padding: 2px 5px;
    border-radius: 4px;
    font-size: 0.82em;
    font-family: var(--font-mono);
    border: 1px solid var(--border);
}

/* ============================================
   INPUT AREA
   ============================================ */
.input-area-wrapper {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-top: 1px solid var(--glass-border);
    padding: 0.75rem 1.25rem 1.1rem;
    flex-shrink: 0;
}
.input-area { max-width: var(--container-max); margin: 0 auto; width: 100%; }
.attachments-preview { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }

.file-chip {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: 4px 9px;
    border-radius: var(--radius-full);
    font-size: 0.73rem;
    color: var(--text-primary);
    animation: chipIn 0.2s ease;
}
@keyframes chipIn {
    from { opacity: 0; transform: scale(0.9); }
    to   { opacity: 1; transform: scale(1); }
}
.file-chip .chip-icon { display: flex; align-items: center; color: var(--accent); }
.file-chip .chip-icon svg, .file-chip .chip-icon .lucide { width: 12px !important; height: 12px !important; }
.file-chip .chip-name   { max-width: 130px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-chip .chip-size   { font-size: 0.65rem; color: var(--text-tertiary); }
.file-chip .chip-status { font-size: 0.65rem; color: var(--warning); }
.file-chip .chip-status.done { color: var(--success); }
.file-chip .chip-remove {
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 0;
    display: flex; align-items: center;
    transition: color var(--transition-fast);
}
.file-chip .chip-remove:hover { color: var(--error); }
.file-chip .chip-remove svg, .file-chip .chip-remove .lucide { width: 11px !important; height: 11px !important; }

.input-wrapper {
    display: flex;
    background: var(--input-bg);
    border-radius: var(--radius-xl);
    padding: 3px 5px 3px 3px;
    align-items: flex-end;
    border: 1px solid var(--input-border);
    transition: border-color var(--transition), box-shadow var(--transition);
    gap: 3px;
    box-shadow: var(--shadow-sm);
}
.input-wrapper:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow), var(--shadow-md);
}
.input-wrapper textarea {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.875rem;
    font-family: inherit;
    padding: 9px 7px 9px 13px;
    outline: none;
    resize: none;
    max-height: 200px;
    min-height: 24px;
    line-height: 1.5;
}
.input-wrapper textarea::placeholder { color: var(--text-tertiary); }
.input-actions { display: flex; align-items: center; gap: 2px; padding-bottom: 3px; }

/* Attach button group */
.attach-group { display: flex; align-items: flex-end; gap: 1px; padding-bottom: 3px; }

.attach-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 7px;
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    transition: all var(--transition-fast);
}
.attach-btn:hover  { background: var(--bg-hover); color: var(--text-primary); }
.attach-btn:active { transform: scale(0.92); }
.attach-btn svg, .attach-btn .lucide { width: 17px !important; height: 17px !important; }

.send-btn {
    background: var(--accent);
    border: none;
    color: white;
    cursor: pointer;
    width: 32px; height: 32px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    transition: all var(--transition);
    flex-shrink: 0;
}
.send-btn:hover    { background: var(--accent-hover); transform: scale(1.05); }
.send-btn:active   { transform: scale(0.95); }
.send-btn:disabled { opacity: 0.35; cursor: not-allowed; transform: none; }
.send-btn.stop-btn { background: var(--error); }
.send-btn.stop-btn:hover { background: #dc2626; }
.send-btn svg, .send-btn .lucide { width: 15px !important; height: 15px !important; }

.input-hint {
    text-align: center;
    font-size: 0.65rem;
    color: var(--text-tertiary);
    margin-top: 7px;
    line-height: 1.4;
}
.input-hint kbd {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 3px;
    padding: 1px 4px;
    font-size: 0.62rem;
    font-family: var(--font-mono);
}

/* ============================================
   THINKING INDICATOR
   ============================================ */
.thinking-indicator {
    display: flex; align-items: center; gap: 8px;
    color: var(--text-secondary);
    font-size: 0.8rem;
    padding: 3px 0;
}
.thinking-dots { display: flex; gap: 3px; }
.thinking-dots span {
    width: 4px; height: 4px;
    border-radius: 50%;
    background: var(--text-tertiary);
    animation: bounce 1.4s infinite ease-in-out both;
}
.thinking-dots span:nth-child(1) { animation-delay: -0.32s; }
.thinking-dots span:nth-child(2) { animation-delay: -0.16s; }
.thinking-dots span:nth-child(3) { animation-delay: 0s; }
@keyframes bounce {
    0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
    40%            { transform: scale(1);   opacity: 1; }
}

/* ============================================
   DRAG & DROP OVERLAY
   ============================================ */
.drop-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 112, 243, 0.04);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 200;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--accent);
    margin: 8px;
    border-radius: var(--radius-lg);
}
.drop-overlay.active { display: flex; }
.drop-overlay-content { text-align: center; color: var(--accent); }
.drop-overlay-content svg, .drop-overlay-content .lucide { width: 40px !important; height: 40px !important; margin-bottom: 10px; }
.drop-overlay-content p    { font-size: 1rem; font-weight: 600; }
.drop-overlay-content span { font-size: 0.8rem; color: var(--text-secondary); }

/* ============================================
   MODEL PARAMETERS PANEL
   ============================================ */
.params-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 150;
    align-items: flex-end;
    justify-content: center;
    padding: 0;
}
.params-backdrop.open { display: flex; }

.params-panel {
    background: var(--bg-elevated);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    width: 100%;
    max-width: 100%;
    max-height: 92vh;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    animation: panelSlideUp 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    flex-direction: column;
}

@keyframes panelSlideUp {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}

@media (min-width: 640px) {
    .params-backdrop { align-items: center; justify-content: center; padding: 1rem; }
    .params-panel    { max-width: 500px; max-height: 88vh; border-radius: var(--radius-xl); }
}

.params-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem 0.875rem;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    background: var(--bg-elevated);
    position: sticky;
    top: 0; z-index: 1;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}
.params-panel-title   { display: flex; align-items: center; gap: 10px; }
.params-panel-title h3 { font-size: 0.95rem; font-weight: 600; letter-spacing: -0.02em; }

.panel-icon {
    width: 30px; height: 30px;
    border-radius: var(--radius-sm);
    background: var(--accent-glow);
    border: 1px solid var(--accent-border);
    display: flex; align-items: center; justify-content: center;
    color: var(--accent);
    flex-shrink: 0;
}
.panel-icon svg, .panel-icon .lucide { width: 15px !important; height: 15px !important; }

.params-close-btn {
    background: var(--bg-hover);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    width: 28px; height: 28px;
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}
.params-close-btn:hover { background: var(--bg-active); color: var(--text-primary); }
.params-close-btn svg, .params-close-btn .lucide { width: 14px !important; height: 14px !important; }

.params-panel-body {
    padding: 1rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    overflow-y: auto;
    flex: 1;
    padding-bottom: env(safe-area-inset-bottom, 0.5rem);
}
.params-panel-footer {
    padding: 0.875rem 1.25rem;
    padding-bottom: max(0.875rem, env(safe-area-inset-bottom));
    border-top: 1px solid var(--border);
    display: flex;
    gap: 8px;
    flex-shrink: 0;
    background: var(--bg-elevated);
    position: sticky;
    bottom: 0; z-index: 1;
}

.params-section       { display: flex; flex-direction: column; gap: 1rem; }
.params-section-label {
    font-size: 0.62rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-tertiary);
    padding-bottom: 4px;
    border-bottom: 1px solid var(--border);
}
.param-row    { display: flex; flex-direction: column; gap: 7px; }
.param-header { display: flex; align-items: center; justify-content: space-between; }
.param-label-group { display: flex; align-items: center; gap: 6px; }
.param-label  { font-size: 0.82rem; font-weight: 500; color: var(--text-primary); }
.param-desc   { font-size: 0.68rem; color: var(--text-tertiary); line-height: 1.4; }

.param-value-badge {
    font-size: 0.72rem;
    font-weight: 600;
    font-family: var(--font-mono);
    color: var(--accent);
    background: var(--accent-glow);
    border: 1px solid var(--accent-border);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    min-width: 48px;
    text-align: center;
    transition: all var(--transition-fast);
}

.param-slider-wrap { display: flex; align-items: center; gap: 9px; }
.param-range {
    -webkit-appearance: none;
    appearance: none;
    flex: 1;
    height: 4px;
    border-radius: 2px;
    background: var(--border-medium);
    outline: none;
    cursor: pointer;
}
.param-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px; height: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: 2px solid var(--bg-elevated);
    box-shadow: 0 0 0 2px var(--accent-border);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.param-range::-webkit-slider-thumb:hover { transform: scale(1.2); box-shadow: 0 0 0 4px var(--accent-glow); }
.param-range::-moz-range-thumb {
    width: 16px; height: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: 2px solid var(--bg-elevated);
    box-shadow: 0 0 0 2px var(--accent-border);
}

.param-range-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.6rem;
    color: var(--text-tertiary);
    font-family: var(--font-mono);
}

.param-number-input {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    color: var(--text-primary);
    padding: 7px 10px;
    border-radius: var(--radius-xs);
    font-size: 0.82rem;
    font-family: var(--font-mono);
    outline: none;
    width: 100%;
    transition: border-color var(--transition), box-shadow var(--transition);
}
.param-number-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }

.param-number-row  { display: flex; gap: 8px; align-items: center; }
.param-preset-chips { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 2px; }

.param-preset-chip {
    font-size: 0.68rem;
    font-family: var(--font-mono);
    font-weight: 500;
    padding: 3px 9px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-light);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}
.param-preset-chip:hover  { border-color: var(--accent-border); color: var(--accent); background: var(--accent-glow); }
.param-preset-chip.active { border-color: var(--accent); color: var(--accent); background: var(--accent-glow); }

.param-toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 13px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    transition: border-color var(--transition-fast);
    gap: 12px;
}
.param-toggle-row:hover   { border-color: var(--border-medium); }
.param-toggle-row.enabled { border-color: var(--accent-border); background: var(--accent-glow); }
.param-toggle-info { display: flex; flex-direction: column; gap: 2px; flex: 1; }

.toggle-switch { position: relative; width: 38px; height: 21px; flex-shrink: 0; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
    position: absolute;
    inset: 0;
    background: var(--border-medium);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: background var(--transition);
}
.toggle-slider::before {
    content: '';
    position: absolute;
    width: 15px; height: 15px;
    left: 3px; top: 3px;
    background: white;
    border-radius: 50%;
    transition: transform var(--transition);
    box-shadow: var(--shadow-xs);
}
.toggle-switch input:checked + .toggle-slider { background: var(--accent); }
.toggle-switch input:checked + .toggle-slider::before { transform: translateX(17px); }

.thinking-budget-wrap {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 10px 13px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px dashed var(--accent-border);
    animation: fadeIn 0.25s ease;
}
.thinking-budget-wrap.visible { display: flex; }
.thinking-budget-label { font-size: 0.72rem; color: var(--text-secondary); font-weight: 500; }

.param-info-dot {
    width: 14px; height: 14px;
    border-radius: 50%;
    border: 1px solid var(--border-light);
    color: var(--text-tertiary);
    font-size: 0.55rem;
    font-weight: 700;
    display: flex; align-items: center; justify-content: center;
    cursor: default;
    position: relative;
    flex-shrink: 0;
}
.param-info-dot:hover { border-color: var(--accent-border); color: var(--accent); }
.param-info-dot .param-tooltip {
    display: none;
    position: absolute;
    bottom: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-elevated);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    padding: 7px 10px;
    font-size: 0.68rem;
    font-weight: 400;
    color: var(--text-secondary);
    line-height: 1.5;
    width: 190px;
    box-shadow: var(--shadow-lg);
    z-index: 20;
    pointer-events: none;
    white-space: normal;
}
.param-info-dot:hover .param-tooltip { display: block; }

/* ============================================
   API LOGS PANEL
   ============================================ */
.logs-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 150;
    align-items: flex-end;
    justify-content: center;
    padding: 0;
}
.logs-backdrop.open { display: flex; }

@media (min-width: 640px) {
    .logs-backdrop { align-items: center; justify-content: center; padding: 1rem; }
    .logs-panel    { max-width: 600px; max-height: 88vh; border-radius: var(--radius-xl) !important; }
}

.logs-panel {
    background: var(--bg-elevated);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    width: 100%;
    max-height: 92vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-xl);
    animation: panelSlideUp 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    overflow: hidden;
}
.logs-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem 0.875rem;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}
.logs-panel-title    { display: flex; align-items: center; gap: 10px; }
.logs-panel-title h3 { font-size: 0.95rem; font-weight: 600; letter-spacing: -0.02em; }
.logs-panel-title .panel-icon {
    background: rgba(34,197,94,0.08);
    border-color: rgba(34,197,94,0.2);
    color: var(--success);
}

.logs-stats-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    padding: 0.875rem 1.25rem;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}
.logs-stat-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 8px 10px;
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.logs-stat-label {
    font-size: 0.58rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-tertiary);
}
.logs-stat-value {
    font-size: 1rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--text-primary);
    line-height: 1;
}
.logs-stat-sub { font-size: 0.6rem; color: var(--text-tertiary); font-family: var(--font-mono); }

.logs-body {
    flex: 1;
    overflow-y: auto;
    padding: 0.875rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 7px;
}
.logs-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 2.5rem 0;
    color: var(--text-tertiary);
    font-size: 0.8rem;
}
.logs-empty svg, .logs-empty .lucide { width: 28px !important; height: 28px !important; opacity: 0.35; }

.log-entry {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    display: flex;
    flex-direction: column;
    gap: 7px;
    transition: border-color var(--transition-fast);
}
.log-entry:hover { border-color: var(--border-medium); }
.log-entry-header { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.log-entry-meta   { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }

.log-badge {
    font-size: 0.6rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.log-badge.success { background: rgba(34,197,94,0.1);  color: var(--success); border: 1px solid rgba(34,197,94,0.2); }
.log-badge.error   { background: rgba(239,68,68,0.1);   color: var(--error);   border: 1px solid rgba(239,68,68,0.2); }
.log-badge.stream  { background: var(--accent-glow);    color: var(--accent);  border: 1px solid var(--accent-border); }

.log-timestamp { font-size: 0.65rem; color: var(--text-tertiary); font-family: var(--font-mono); }
.log-duration  { font-size: 0.65rem; color: var(--text-secondary); font-family: var(--font-mono); margin-left: auto; }

.log-tokens-row { display: flex; gap: 5px; flex-wrap: wrap; }
.log-token-chip {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.67rem;
    font-family: var(--font-mono);
    padding: 2px 7px;
    border-radius: var(--radius-full);
    background: var(--bg-primary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
}
.log-token-chip .chip-dot            { width: 5px; height: 5px; border-radius: 50%; }
.log-token-chip .chip-dot.prompt     { background: #4dabf7; }
.log-token-chip .chip-dot.completion { background: var(--success); }
.log-token-chip .chip-dot.total      { background: var(--accent); }
.log-token-chip .chip-dot.thinking   { background: #a78bfa; }

.log-preview {
    font-size: 0.7rem;
    color: var(--text-tertiary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-style: italic;
}

.logs-panel-footer {
    padding: 0.75rem 1.25rem;
    padding-bottom: max(0.75rem, env(safe-area-inset-bottom));
    border-top: 1px solid var(--border);
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 900px) {
    :root { --container-max: 96%; }
    .chat-container     { padding: 1rem; }
    .input-area-wrapper { padding: 0.5rem 1rem 1rem; }
}

@media (max-width: 640px) {
    :root { --container-max: 100%; }
    .header             { padding: 0 0.75rem; }
    .chat-container     { padding: 0.75rem; gap: 1rem; }
    .input-area-wrapper { padding: 0.5rem 0.75rem 0.75rem; }
    .welcome-title      { font-size: 1.2rem; }
    .quick-actions      { grid-template-columns: 1fr; }
    .message.user .message-bubble { max-width: 90%; }
    .sidebar            { width: 86vw; }
    .message-actions    { opacity: 1; }
    .logs-stats-bar     { grid-template-columns: repeat(2, 1fr); }
    .params-panel-body  { padding: 0.875rem 1rem; gap: 1rem; }
    .settings-accordion-body.open { max-height: 380px; }
}

@media print {
    .header, .input-area-wrapper, .sidebar, .overlay { display: none !important; }
    .chat-container { max-width: 100%; }
}

/* ============================================
   v4 — MODEL SELECTOR & NEW CONFIG PANEL
   ============================================ */

/* Header right slot */
.header-right {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 8px;
    padding-right: 2px;
}

.header-logo {
    width: 26px; height: 26px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--accent), #4dabf7);
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}

.header-model-pill {
    display: flex;
    align-items: center;
    gap: 5px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    padding: 3px 10px;
    font-size: 0.68rem;
    font-weight: 500;
    color: var(--text-secondary);
    max-width: 180px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Config key wrap */
.config-key-wrap {
    position: relative;
    display: flex;
    align-items: center;
}
.config-key-wrap .config-input {
    padding-right: 34px;
}
.config-eye-btn {
    position: absolute;
    right: 6px;
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-xs);
    transition: color var(--transition-fast);
}
.config-eye-btn:hover { color: var(--text-primary); }
.config-eye-btn svg, .config-eye-btn .lucide { width: 13px !important; height: 13px !important; }

/* Model selector button */
.model-selector-wrap {
    position: relative;
    width: 100%;
}

.model-selector-btn {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 7px;
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    color: var(--text-primary);
    padding: 7px 9px;
    border-radius: var(--radius-xs);
    font-size: 0.76rem;
    font-family: inherit;
    cursor: pointer;
    transition: border-color var(--transition), box-shadow var(--transition);
    text-align: left;
    min-height: 34px;
}
.model-selector-btn:hover {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.model-selector-icon  { font-size: 0.85rem; flex-shrink: 0; }
.model-selector-name  { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 0.74rem; }
.model-selector-chevron {
    width: 13px !important; height: 13px !important;
    color: var(--text-tertiary);
    transition: transform var(--transition);
    flex-shrink: 0;
}
.model-selector-chevron.rotated { transform: rotate(180deg); }

/* Model dropdown */
.model-dropdown {
    display: none;
    position: absolute;
    bottom: calc(100% + 4px);
    left: 0; right: 0;
    background: var(--bg-elevated);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    z-index: 300;
    overflow: hidden;
    flex-direction: column;
    max-height: 320px;
}
.model-dropdown.open { display: flex; }

.model-search-wrap {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 8px 10px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}
.model-search-wrap svg, .model-search-wrap .lucide {
    width: 13px !important; height: 13px !important;
    color: var(--text-tertiary);
    flex-shrink: 0;
}
.model-search-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    font-size: 0.76rem;
    font-family: inherit;
    color: var(--text-primary);
}
.model-search-input::placeholder { color: var(--text-tertiary); }

.model-list {
    overflow-y: auto;
    flex: 1;
    padding: 4px 0;
}

.model-group-header {
    font-size: 0.58rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-tertiary);
    padding: 8px 10px 3px;
}

.model-item {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 7px 10px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.76rem;
    font-family: inherit;
    text-align: left;
    transition: background var(--transition-fast);
}
.model-item:hover  { background: var(--bg-hover); }
.model-item.active { background: var(--accent-glow); color: var(--accent); }

.model-item-icon { font-size: 0.9rem; flex-shrink: 0; width: 18px; text-align: center; }

.model-item-info {
    display: flex;
    flex-direction: column;
    gap: 1px;
    flex: 1;
    min-width: 0;
}
.model-item-label {
    font-size: 0.76rem;
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.model-item-provider {
    font-size: 0.62rem;
    color: var(--text-tertiary);
}
.model-item.active .model-item-provider { color: var(--accent); opacity: 0.7; }

.model-item-check {
    width: 13px !important; height: 13px !important;
    color: var(--accent);
    flex-shrink: 0;
}

/* Bot model tag */
.bot-model-tag {
    font-size: 0.62rem;
    font-weight: 600;
    color: var(--text-tertiary);
    margin-bottom: 4px;
    font-family: var(--font-mono);
    letter-spacing: 0.02em;
}

/* Wider sidebar for model list */
.sidebar { width: 320px; }
@media (max-width: 640px) { .sidebar { width: 90vw; } }

/* Settings accordion max-height bump for new config */
.settings-accordion-body.open { max-height: 480px; }
@media (max-width: 640px) {
    .settings-accordion-body.open { max-height: 440px; }
}

/* ============================================
   v5 ADDITIONS
   ============================================ */

/* ── Model capability badges in dropdown ── */
.model-item-badges {
    display: flex;
    gap: 2px;
    flex-shrink: 0;
    align-items: center;
}
.model-cap-badge {
    font-size: 0.6rem;
    padding: 0 3px;
    border-radius: 3px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    line-height: 1.6;
    cursor: default;
    title: '';
}
.model-cap-badge.vision  { background: rgba(0,112,243,0.08); border-color: rgba(0,112,243,0.2); }
.model-cap-badge.cache   { background: rgba(245,158,11,0.08); border-color: rgba(245,158,11,0.2); }
.model-cap-badge.reason  { background: rgba(168,85,247,0.08); border-color: rgba(168,85,247,0.2); }
.model-cap-badge.img     { background: rgba(236,72,153,0.08); border-color: rgba(236,72,153,0.2); }
.model-cap-badge.async   { background: rgba(20,184,166,0.08); border-color: rgba(20,184,166,0.2); }

/* ── Mode badge in input area ── */
.mode-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--accent);
    background: var(--accent-glow);
    border: 1px solid var(--accent-border);
    border-radius: var(--radius-full);
    padding: 3px 10px;
    margin-bottom: 6px;
    width: fit-content;
}

/* ── Image thumbnails in attachment chips ── */
.file-chip.image-chip { padding: 3px 9px; }
.chip-thumbnail {
    width: 28px;
    height: 28px;
    object-fit: cover;
    border-radius: 4px;
    flex-shrink: 0;
    border: 1px solid var(--border);
}

/* ── User message image thumbs ── */
.user-image-thumb {
    width: 48px;
    height: 48px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    vertical-align: middle;
    margin: 0 2px;
    cursor: pointer;
    transition: transform var(--transition-fast);
}
.user-image-thumb:hover { transform: scale(1.08); }

/* ── Generated image result ── */
.image-result {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 520px;
}
.generated-image {
    width: 100%;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    display: block;
    box-shadow: var(--shadow-md);
    background: var(--bg-tertiary);
}
.image-result-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

/* ── Reasoning block ── */
.reasoning-block {
    background: rgba(168,85,247,0.04);
    border: 1px solid rgba(168,85,247,0.15);
    border-radius: var(--radius-md);
    margin-bottom: 10px;
    overflow: hidden;
}
.reasoning-summary {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 8px 12px;
    cursor: pointer;
    font-size: 0.75rem;
    font-weight: 600;
    color: #a78bfa;
    user-select: none;
    list-style: none;
}
.reasoning-summary::-webkit-details-marker { display: none; }
.reasoning-summary:hover { background: rgba(168,85,247,0.06); }
.reasoning-summary svg, .reasoning-summary .lucide { width: 13px !important; height: 13px !important; flex-shrink: 0; }
.reasoning-token-count {
    font-size: 0.65rem;
    font-family: var(--font-mono);
    color: #a78bfa;
    opacity: 0.7;
    margin-left: auto;
}
.reasoning-content {
    padding: 10px 14px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.65;
    border-top: 1px solid rgba(168,85,247,0.1);
    max-height: 300px;
    overflow-y: auto;
}

/* ── Capability-disabled state in params panel ── */
.capability-disabled { opacity: 0.5; pointer-events: none; }
.capability-disabled .param-toggle-row { border-color: var(--border) !important; background: var(--bg-tertiary) !important; }

.capability-tip {
    font-size: 0.73rem;
    color: var(--warning);
    background: rgba(245,158,11,0.06);
    border: 1px solid rgba(245,158,11,0.15);
    border-radius: var(--radius-xs);
    padding: 7px 10px;
    line-height: 1.5;
    margin-bottom: 4px;
}

/* ── Provider badge in params panel ── */
.provider-badge {
    font-size: 0.6rem;
    font-weight: 700;
    padding: 1px 6px;
    border-radius: var(--radius-full);
    background: var(--accent-glow);
    color: var(--accent);
    border: 1px solid var(--accent-border);
    margin-left: 6px;
    text-transform: none;
    letter-spacing: 0;
    vertical-align: middle;
}

/* ── Caching & reasoning detail panels ── */
.caching-details {
    display: flex;
    flex-direction: column;
    gap: 6px;
    background: var(--bg-tertiary);
    border: 1px dashed var(--accent-border);
    border-radius: var(--radius-md);
    padding: 10px 13px;
    animation: fadeIn 0.2s ease;
}

.param-select {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    color: var(--text-primary);
    padding: 7px 10px;
    border-radius: var(--radius-xs);
    font-size: 0.78rem;
    font-family: inherit;
    outline: none;
    cursor: pointer;
    transition: border-color var(--transition), box-shadow var(--transition);
    width: 100%;
    appearance: auto;
}
.param-select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }

/* ── Reasoning effort chips ── */
.effort-chips-row {
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
}
.effort-chip {
    font-size: 0.72rem;
    font-weight: 500;
    padding: 4px 11px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-light);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
}
.effort-chip:hover { border-color: #a78bfa; color: #a78bfa; background: rgba(168,85,247,0.08); }
.effort-chip.active { border-color: #a78bfa; color: #a78bfa; background: rgba(168,85,247,0.12); font-weight: 600; }

/* ── Cache stat in logs ── */
.log-cache-row {
    display: flex;
    align-items: center;
    gap: 5px;
    flex-wrap: wrap;
}
.cache-label {
    font-size: 0.62rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-tertiary);
    margin-right: 2px;
}
.log-token-chip.cache-hit  { border-color: rgba(34,197,94,0.25); background: rgba(34,197,94,0.05); }
.log-token-chip.cache-miss { border-color: rgba(245,158,11,0.25); background: rgba(245,158,11,0.05); }
.chip-dot.cache-read  { background: var(--success); }
.chip-dot.cache-write { background: var(--warning); }

/* ── Logs stats bar: 5-column on desktop, 2x+1 on mobile ── */
.logs-stats-bar { grid-template-columns: repeat(5, 1fr); }
@media (max-width: 640px) {
    .logs-stats-bar { grid-template-columns: repeat(2, 1fr); }
}

/* ── Async progress indicator ── */
@keyframes asyncPulse {
    0%, 100% { opacity: 0.6; }
    50%       { opacity: 1; }
}
.async-progress { animation: asyncPulse 1.8s ease-in-out infinite; }

/* Code block collapse transition */
.code-body {
    overflow: hidden;
    transition: none;
}