/* ===================================================
   HusAzQuantiLabs - AI Chat Theme
   =================================================== */

/* --- CSS Variables --- */
:root {
    --primary: #0e8f85;
    --primary-dark: #0b726a;
    --primary-light: #12b5a8;
    --green: #61a229;
    --red: #FF0039;
    --orange: #fcb900;
    --purple: #9b51e0;

    --dark: #111827;
    --dark-mid: #1f2937;
    --gray-700: #374151;
    --gray-600: #4b5563;
    --gray-500: #6b7280;
    --gray-400: #9ca3af;
    --gray-300: #d1d5db;
    --gray-200: #e5e7eb;
    --gray-100: #f3f4f6;
    --gray-50: #f9fafb;
    --white: #ffffff;

    --body-bg: #f9fafb;
    --card-bg: #ffffff;
    --chat-bg: #f9fafb;
    --msg-user-bg: #0e8f85;
    --msg-user-color: #ffffff;
    --msg-ai-bg: #ffffff;
    --msg-ai-color: #111827;
    --msg-ai-border: #e5e7eb;
    --input-bg: #ffffff;
    --input-border: #d1d5db;
    --input-focus: #0e8f85;
    --header-bg: #ffffff;
    --header-border: #e5e7eb;
    --code-bg: #1e293b;
    --code-color: #e2e8f0;
    --dropdown-bg: #ffffff;
    --dropdown-hover: #f3f4f6;
    --dropdown-border: #e5e7eb;

    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Consolas', monospace;
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.1), 0 8px 10px rgba(0,0,0,0.04);
    --radius: 8px;
    --radius-sm: 4px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
}

/* --- Dark Theme --- */
[data-theme="dark"] {
    --primary: #14cfc0;
    --primary-dark: #0e8f85;
    --primary-light: #5eead4;

    --dark: #f1f5f9;
    --dark-mid: #e2e8f0;
    --gray-700: #94a3b8;
    --gray-600: #94a3b8;
    --gray-500: #64748b;
    --gray-400: #475569;
    --gray-300: #334155;
    --gray-200: #1e293b;
    --gray-100: #1e293b;
    --gray-50: #0f172a;
    --white: #0f172a;

    --body-bg: #0f172a;
    --card-bg: #1e293b;
    --chat-bg: #0f172a;
    --msg-user-bg: #0e8f85;
    --msg-user-color: #ffffff;
    --msg-ai-bg: #1e293b;
    --msg-ai-color: #e2e8f0;
    --msg-ai-border: #334155;
    --input-bg: #1e293b;
    --input-border: #334155;
    --input-focus: #14cfc0;
    --header-bg: #1e293b;
    --header-border: #334155;
    --code-bg: #0f172a;
    --code-color: #e2e8f0;
    --dropdown-bg: #1e293b;
    --dropdown-hover: #334155;
    --dropdown-border: #334155;

    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow: 0 1px 3px rgba(0,0,0,0.4);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.4);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.5);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.5);
}

/* --- Reset --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 15px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--dark);
    background: var(--body-bg);
    min-height: 100vh;
    overflow: hidden;
    transition: background var(--transition), color var(--transition);
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
code, pre { font-family: var(--font-mono); }

/* ===================================================
   App Shell Layout (Sidebar + Main)
   =================================================== */
.app-shell {
    display: flex;
    height: 100vh;
    width: 100%;
}

/* --- Sidebar --- */
.sidebar {
    width: 240px;
    min-width: 240px;
    height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--header-bg);
    border-right: 1px solid var(--header-border);
    transition: width 0.25s ease, min-width 0.25s ease,
                background var(--transition), border-color var(--transition);
    z-index: 60;
    overflow: hidden;
}

/* --- Collapsed Sidebar --- */
.sidebar.collapsed {
    width: 60px;
    min-width: 60px;
}

.sidebar.collapsed .nav-item span { display: none; }
.sidebar.collapsed .sidebar-user-info { display: none; }
.sidebar.collapsed .sidebar-logout-btn { display: none; }

.sidebar.collapsed .sidebar-header {
    padding: 12px 6px;
    justify-content: center;
}

.sidebar.collapsed .sidebar-logo {
    height: 28px;
    flex: none;
}

.sidebar.collapsed .sidebar-nav {
    padding: 12px 6px;
}

.sidebar.collapsed .nav-item {
    justify-content: center;
    padding: 10px;
}

.sidebar.collapsed .sidebar-footer {
    justify-content: center;
    padding: 12px 6px;
}

.sidebar.collapsed .sidebar-user {
    justify-content: center;
}

.sidebar.collapsed .sidebar-collapse-btn {
    display: none;
}

.sidebar.collapsed {
    cursor: pointer;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 18px;
    border-bottom: 1px solid var(--header-border);
}

.sidebar-logo {
    height: 36px;
    width: auto;
    object-fit: contain;
    flex: 1;
    min-width: 0;
}

/* --- Sidebar Collapse Button --- */
.sidebar-collapse-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: none;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    color: var(--gray-500);
    cursor: pointer;
    transition: all var(--transition);
    margin-left: auto;
    flex-shrink: 0;
}

.sidebar-collapse-btn:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: rgba(14, 143, 133, 0.06);
}

.sidebar-collapse-btn svg {
    width: 16px;
    height: 16px;
}

.sidebar-collapse-btn .expand-icon { display: none; }
.sidebar.collapsed .sidebar-collapse-btn .collapse-icon { display: none; }
.sidebar.collapsed .sidebar-collapse-btn .expand-icon { display: block; }

.sidebar-nav {
    flex: 1;
    padding: 12px 10px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: var(--radius);
    color: var(--gray-600);
    font-size: 0.88rem;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition);
    cursor: pointer;
}

.nav-item svg {
    width: 18px;
    height: 18px;
    min-width: 18px;
    stroke: currentColor;
}

.nav-item:hover {
    background: var(--gray-100);
    color: var(--dark);
    text-decoration: none;
}

.nav-item.active {
    background: rgba(14, 143, 133, 0.1);
    color: var(--primary);
    font-weight: 600;
}

[data-theme="dark"] .nav-item.active {
    background: rgba(20, 207, 192, 0.12);
}

.sidebar-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 14px;
    border-top: 1px solid var(--header-border);
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

.sidebar-avatar {
    width: 30px;
    height: 30px;
    font-size: 0.78rem;
}

.sidebar-user-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.sidebar-user-name {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--dark);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-user-email {
    font-size: 0.72rem;
    color: var(--gray-500);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 140px;
}

.sidebar-logout-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: none;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    color: var(--gray-500);
    cursor: pointer;
    transition: all var(--transition);
}

.sidebar-logout-btn:hover {
    color: var(--red);
    border-color: var(--red);
    background: rgba(255, 0, 57, 0.06);
}

.sidebar-logout-btn svg {
    width: 16px;
    height: 16px;
}

/* --- Mobile Topbar (hidden on desktop) --- */
.mobile-topbar {
    display: none;
    align-items: center;
    justify-content: space-between;
    height: 50px;
    padding: 0 12px;
    background: var(--header-bg);
    border-bottom: 1px solid var(--header-border);
    flex-shrink: 0;
}

.mobile-brand {
    font-weight: 700;
    font-size: 1rem;
    color: var(--dark);
}

/* --- Main Content --- */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    min-width: 0;
    overflow: hidden;
}

/* --- Page Sections --- */
.page-section {
    display: none;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.page-section.active {
    display: flex;
}

.page-header {
    padding: 24px 28px 16px;
    border-bottom: 1px solid var(--header-border);
    background: var(--header-bg);
    flex-shrink: 0;
}

.page-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 2px;
}

.page-subtitle {
    font-size: 0.85rem;
    color: var(--gray-500);
}

.page-body {
    flex: 1;
    overflow-y: auto;
    padding: 24px 28px;
    background: var(--chat-bg);
}

.placeholder-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    min-height: 300px;
    text-align: center;
    color: var(--gray-400);
}

.placeholder-content svg {
    width: 56px;
    height: 56px;
    margin-bottom: 16px;
    stroke: var(--gray-300);
}

.placeholder-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-500);
    margin-bottom: 6px;
}

.placeholder-content p {
    font-size: 0.88rem;
    color: var(--gray-400);
    max-width: 360px;
}

/* ===================================================
   Chat Page Layout (within page-section)
   =================================================== */

/* --- Chat Header --- */
.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
    padding: 0 16px;
    background: var(--header-bg);
    border-bottom: 1px solid var(--header-border);
    flex-shrink: 0;
    z-index: 50;
    transition: background var(--transition), border-color var(--transition);
}

.chat-header-left {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

.chat-logo {
    width: 30px;
    height: 30px;
    border-radius: var(--radius-sm);
    object-fit: contain;
}

.chat-brand {
    font-weight: 600;
    font-size: 1.05rem;
    color: var(--dark);
    white-space: nowrap;
}

.chat-header-center {
    flex: 1;
    display: flex;
    justify-content: center;
}

.chat-header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* --- Model Selector --- */
.model-selector {
    position: relative;
}

.model-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-full);
    color: var(--dark);
    font-family: var(--font-primary);
    font-size: 0.87rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.model-btn:hover {
    background: var(--gray-100);
    border-color: var(--gray-300);
}

.model-icon {
    width: 16px;
    height: 16px;
    color: var(--primary);
}

.chevron-icon {
    width: 14px;
    height: 14px;
    color: var(--gray-500);
    transition: transform var(--transition);
}

.model-selector.open .chevron-icon {
    transform: rotate(180deg);
}

.model-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    min-width: 260px;
    background: var(--dropdown-bg);
    border: 1px solid var(--dropdown-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: 6px;
    z-index: 100;
    display: none;
    animation: dropdownFade 0.15s ease;
}

.model-selector.open .model-dropdown {
    display: block;
}

@keyframes dropdownFade {
    from { opacity: 0; transform: translateX(-50%) translateY(-4px); }
    to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

.model-dropdown-header {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray-500);
    padding: 8px 12px 4px;
}

.model-option {
    display: flex;
    flex-direction: column;
    width: 100%;
    padding: 8px 12px;
    background: none;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    text-align: left;
    transition: background var(--transition);
    font-family: var(--font-primary);
}

.model-option:hover {
    background: var(--dropdown-hover);
}

.model-option.active {
    background: rgba(14, 143, 133, 0.08);
}

.model-option-name {
    font-size: 0.87rem;
    font-weight: 500;
    color: var(--dark);
}

.model-option.active .model-option-name {
    color: var(--primary);
}

.model-option-desc {
    font-size: 0.75rem;
    color: var(--gray-500);
    margin-top: 1px;
}

/* --- Model Dropdown Loading & Error --- */
.model-dropdown-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px;
    font-size: 0.82rem;
    color: var(--gray-500);
}

.spinner-sm {
    width: 16px;
    height: 16px;
    border: 2px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.model-dropdown-error {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 14px;
    font-size: 0.82rem;
    color: var(--gray-500);
}

.model-retry-btn {
    padding: 4px 12px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition);
}

.model-retry-btn:hover {
    background: var(--primary-dark);
}

/* --- Icon Buttons --- */
.icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: none;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    cursor: pointer;
    color: var(--gray-600);
    transition: all var(--transition);
}

.icon-btn:hover {
    background: var(--gray-100);
    color: var(--dark);
    border-color: var(--gray-300);
}

.icon-btn svg {
    width: 18px;
    height: 18px;
}

/* Theme toggle icons */
.icon-btn .icon-sun { display: none; }
[data-theme="dark"] .icon-btn .icon-sun { display: block; }
[data-theme="dark"] .icon-btn .icon-moon { display: none; }

/* --- User Avatar --- */
.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    flex-shrink: 0;
}

/* ===================================================
   Chat Messages Area
   =================================================== */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 0;
    background: var(--chat-bg);
    transition: background var(--transition);
}

.chat-messages::-webkit-scrollbar {
    width: 6px;
}
.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}
.chat-messages::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 3px;
}
.chat-messages::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

/* --- Welcome Screen --- */
.chat-welcome {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    padding: 40px 20px;
    text-align: center;
    animation: fadeIn 0.4s ease;
}

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

.welcome-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-xl);
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.welcome-icon svg {
    width: 32px;
    height: 32px;
    color: #fff;
    stroke: #fff;
}

.chat-welcome h2 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.chat-welcome p {
    font-size: 0.95rem;
    color: var(--gray-500);
    max-width: 400px;
}

.welcome-suggestions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-top: 32px;
    max-width: 560px;
    width: 100%;
}

.suggestion-chip {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
    background: var(--card-bg);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    color: var(--dark);
    font-family: var(--font-primary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    text-align: left;
    transition: all var(--transition);
    line-height: 1.4;
}

.suggestion-chip:hover {
    border-color: var(--primary);
    background: rgba(14, 143, 133, 0.04);
    box-shadow: var(--shadow-sm);
}

.suggestion-chip svg {
    width: 18px;
    height: 18px;
    min-width: 18px;
    color: var(--primary);
}

/* --- Message Bubbles --- */
.msg-row {
    display: flex;
    padding: 16px 0;
    animation: msgIn 0.25s ease;
}

@keyframes msgIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

.msg-row.user {
    justify-content: flex-end;
}

.msg-row.assistant {
    justify-content: flex-start;
}

.msg-content {
    max-width: 100%;
    width: 100%;
    padding: 0 24px;
}

.msg-row.user .msg-content {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.msg-bubble {
    padding: 12px 18px;
    border-radius: var(--radius-xl);
    line-height: 1.65;
    font-size: 0.93rem;
    word-break: break-word;
    position: relative;
}

.msg-row.user .msg-bubble {
    background: var(--msg-user-bg);
    color: var(--msg-user-color);
    border-bottom-right-radius: var(--radius-sm);
    max-width: 85%;
}

.msg-row.assistant .msg-bubble {
    background: transparent;
    color: var(--msg-ai-color);
    padding: 0;
    max-width: 100%;
}

/* Assistant message content formatting */
.msg-row.assistant .msg-bubble p {
    margin-bottom: 12px;
}

.msg-row.assistant .msg-bubble p:last-child {
    margin-bottom: 0;
}

.msg-row.assistant .msg-bubble code {
    background: var(--code-bg);
    color: var(--code-color);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-size: 0.85em;
}

.msg-row.assistant .msg-bubble pre {
    background: var(--code-bg);
    color: var(--code-color);
    padding: 16px;
    border-radius: var(--radius);
    overflow-x: auto;
    margin: 12px 0;
    font-size: 0.85rem;
    line-height: 1.6;
}

.msg-row.assistant .msg-bubble pre code {
    background: none;
    padding: 0;
    color: inherit;
}

.msg-row.assistant .msg-bubble ul,
.msg-row.assistant .msg-bubble ol {
    padding-left: 20px;
    margin: 8px 0;
}

.msg-row.assistant .msg-bubble li {
    margin-bottom: 4px;
}

.msg-row.assistant .msg-bubble strong {
    font-weight: 600;
}

.msg-row.assistant .msg-bubble h1,
.msg-row.assistant .msg-bubble h2,
.msg-row.assistant .msg-bubble h3 {
    font-weight: 600;
    margin: 16px 0 8px;
}

.msg-row.assistant .msg-bubble h1 { font-size: 1.3rem; }
.msg-row.assistant .msg-bubble h2 { font-size: 1.15rem; }
.msg-row.assistant .msg-bubble h3 { font-size: 1.05rem; }

/* --- Message Footer (timestamp + tokens) --- */
.msg-footer {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 6px;
    font-size: 0.7rem;
    color: var(--gray-500);
    letter-spacing: 0.01em;
}

.msg-row.user .msg-footer {
    justify-content: flex-end;
}

.msg-footer .token-info {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--gray-500);
    opacity: 0.85;
}

.msg-footer .msg-timestamp {
    font-size: 0.68rem;
    color: var(--gray-400);
    opacity: 0.8;
}

/* --- Typing indicator --- */
.typing-indicator {
    display: inline-flex;
    gap: 4px;
    padding: 8px 0;
}

.typing-indicator span {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--gray-400);
    animation: typingBounce 1.2s infinite;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-6px); opacity: 1; }
}

/* --- Model label in messages --- */
.msg-model-label {
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--gray-500);
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.msg-model-label svg {
    width: 12px;
    height: 12px;
}

/* ===================================================
   Chat Input Area
   =================================================== */
.chat-input-area {
    flex-shrink: 0;
    padding: 0 max(16px, calc((100% - 800px) / 2)) 12px;
    background: var(--chat-bg);
    transition: background var(--transition);
}

.chat-input-container {
    display: flex;
    align-items: flex-end;
    gap: 0;
    background: var(--input-bg);
    border: 1.5px solid var(--input-border);
    border-radius: var(--radius-xl);
    padding: 8px 12px 8px 18px;
    transition: all var(--transition);
    box-shadow: var(--shadow-sm);
}

.chat-input-container:focus-within {
    border-color: var(--input-focus);
    box-shadow: 0 0 0 3px rgba(14, 143, 133, 0.12);
}

.chat-input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    font-family: var(--font-primary);
    font-size: 0.93rem;
    color: var(--dark);
    resize: none;
    max-height: 200px;
    line-height: 1.5;
    padding: 6px 0;
}

.chat-input::placeholder {
    color: var(--gray-400);
}

.chat-input-actions {
    display: flex;
    align-items: center;
    gap: 6px;
    padding-bottom: 2px;
}

/* --- Send Button --- */
.send-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius);
    border: none;
    background: var(--primary);
    color: #fff;
    cursor: pointer;
    transition: all var(--transition);
    flex-shrink: 0;
}

.send-btn:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: scale(1.05);
}

.send-btn:disabled {
    background: var(--gray-300);
    cursor: not-allowed;
    color: var(--gray-500);
}

.send-btn svg {
    width: 18px;
    height: 18px;
}

/* --- Stop Button --- */
.stop-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: var(--radius);
    border: 1px solid var(--red);
    background: rgba(255, 0, 57, 0.08);
    color: var(--red);
    font-family: var(--font-primary);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.stop-btn:hover {
    background: var(--red);
    color: #fff;
}

.stop-btn svg {
    width: 14px;
    height: 14px;
}

/* --- Disclaimer --- */
.chat-disclaimer {
    text-align: center;
    font-size: 0.73rem;
    color: var(--gray-400);
    margin-top: 8px;
}

/* ===================================================
   Auth Screens
   =================================================== */
.auth-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #0e8f85 0%, #0b726a 40%, #111827 100%);
    padding: 24px;
    position: fixed;
    inset: 0;
    z-index: 9999;
}

.auth-card {
    background: var(--card-bg, #ffffff);
    border-radius: var(--radius-xl);
    padding: 48px 40px;
    max-width: 440px;
    width: 100%;
    text-align: center;
    box-shadow: var(--shadow-xl);
    animation: authFadeIn 0.5s ease-out;
}

.auth-card-error {
    max-width: 500px;
    border-top: 4px solid var(--red);
}

@keyframes authFadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

.auth-logo { margin-bottom: 24px; }
.auth-logo-img { height: 48px; width: auto; }

.auth-title {
    font-family: var(--font-primary);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--dark, #111827);
    margin-bottom: 4px;
}

.auth-title-error { color: var(--red); }

.auth-subtitle {
    font-size: 0.95rem;
    color: var(--gray-500, #6b7280);
    margin-bottom: 20px;
    font-weight: 500;
}

.auth-description {
    font-size: 0.9rem;
    color: var(--gray-500, #6b7280);
    line-height: 1.5;
    margin-bottom: 8px;
}

.auth-blocked-email {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 600;
    color: var(--red);
    background: rgba(255, 0, 57, 0.08);
    border: 1px solid rgba(255, 0, 57, 0.2);
    border-radius: var(--radius);
    padding: 10px 16px;
    margin: 12px 0 16px;
    word-break: break-all;
}

.auth-error-icon { margin-bottom: 16px; }
.auth-error-icon svg { color: var(--red); stroke: var(--red); }

.auth-help-box {
    background: var(--gray-100, #f3f4f6);
    border-radius: var(--radius-lg);
    padding: 16px 20px;
    margin: 20px 0;
    text-align: left;
    font-size: 0.85rem;
    color: var(--gray-700, #374151);
    line-height: 1.6;
}

.auth-help-box p + p { margin-top: 6px; }

.auth-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 28px;
    border: none;
    border-radius: var(--radius);
    font-family: var(--font-primary);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.auth-btn-primary {
    background: var(--primary);
    color: #ffffff;
    margin-top: 24px;
    box-shadow: 0 4px 14px rgba(14, 143, 133, 0.35);
}

.auth-btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(14, 143, 133, 0.45);
}

.auth-btn-secondary {
    background: transparent;
    color: var(--gray-700, #374151);
    border: 2px solid var(--gray-200, #e5e7eb);
    margin-top: 8px;
}

.auth-btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.auth-btn-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    margin-top: 20px;
}

.auth-footer {
    font-size: 0.78rem;
    color: var(--gray-400, #9ca3af);
    margin-top: 24px;
}

[data-theme="dark"] .auth-screen {
    background: linear-gradient(135deg, #0b726a 0%, #0f172a 60%, #0f172a 100%);
}

[data-theme="dark"] .auth-help-box {
    background: #0f172a;
    color: #94a3b8;
}

[data-theme="dark"] .auth-blocked-email {
    background: rgba(255, 0, 57, 0.12);
    border-color: rgba(255, 0, 57, 0.25);
}

/* ===================================================
   Consumption Tracking Page
   =================================================== */

/* --- Controls --- */
.consumption-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 16px;
    margin-bottom: 24px;
    padding: 20px;
    background: var(--card-bg);
    border: 1px solid var(--header-border);
    border-radius: var(--radius-lg);
}

.consumption-date-range {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    flex-wrap: wrap;
}

.date-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.date-field label {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.date-input {
    padding: 8px 12px;
    border: 1px solid var(--input-border);
    border-radius: var(--radius);
    background: var(--input-bg);
    color: var(--dark);
    font-family: var(--font-primary);
    font-size: 0.88rem;
    transition: border-color var(--transition);
}

.date-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(14, 143, 133, 0.12);
}

.date-separator {
    font-size: 0.85rem;
    color: var(--gray-400);
    padding-bottom: 10px;
}

.consumption-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border: 1px solid var(--input-border);
    border-radius: var(--radius);
    font-family: var(--font-primary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.consumption-btn.primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.consumption-btn.primary:hover {
    background: var(--primary-dark);
}

.consumption-quick-range {
    display: flex;
    gap: 6px;
    margin-left: auto;
}

.range-btn {
    padding: 6px 14px;
    border: 1px solid var(--input-border);
    border-radius: var(--radius-full);
    background: var(--card-bg);
    color: var(--gray-600);
    font-family: var(--font-primary);
    font-size: 0.78rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
}

.range-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.range-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* --- Error & Loading --- */
.consumption-error {
    padding: 12px 16px;
    background: rgba(255, 0, 57, 0.06);
    border: 1px solid rgba(255, 0, 57, 0.15);
    border-radius: var(--radius);
    color: var(--red);
    font-size: 0.88rem;
    margin-bottom: 16px;
}

.consumption-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 48px 20px;
    color: var(--gray-500);
    font-size: 0.9rem;
}

/* --- Summary Cards --- */
.consumption-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 28px;
}

.consumption-card {
    background: var(--card-bg);
    border: 1px solid var(--header-border);
    border-radius: var(--radius-lg);
    padding: 20px;
    text-align: center;
    transition: box-shadow var(--transition);
}

.consumption-card:hover {
    box-shadow: var(--shadow-md);
}

.consumption-card-label {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.consumption-card-value {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--dark);
    font-family: var(--font-mono);
}

.consumption-card.card-input {
    border-left: 3px solid var(--primary);
}

.consumption-card.card-output {
    border-left: 3px solid var(--purple);
}

.consumption-card.card-cost {
    border-left: 3px solid var(--green);
}

/* --- Sections --- */
.consumption-section {
    background: var(--card-bg);
    border: 1px solid var(--header-border);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 20px;
}

.consumption-section-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 16px;
}

/* --- Table --- */
.consumption-table-wrap {
    overflow-x: auto;
}

.consumption-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

.consumption-table thead {
    background: var(--gray-50);
    border-bottom: 2px solid var(--header-border);
}

.consumption-table th {
    padding: 10px 14px;
    text-align: left;
    font-weight: 600;
    color: var(--gray-600);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.consumption-table th.num-header {
    text-align: right;
}

.consumption-table td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--gray-200);
    color: var(--dark);
}

.consumption-table td.num-cell {
    text-align: right;
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

.consumption-table td.cost-cell {
    color: var(--green);
    font-weight: 500;
}

.model-name-cell {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
}

.model-color-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.consumption-empty {
    text-align: center;
    color: var(--gray-400);
    padding: 24px !important;
    font-style: italic;
}

[data-theme="dark"] .consumption-table thead {
    background: var(--gray-200);
}

/* --- Bar Chart --- */
.chart-bars {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.chart-bar-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.chart-bar-label {
    width: 140px;
    flex-shrink: 0;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--dark);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.chart-bar-track {
    flex: 1;
    display: flex;
    height: 28px;
    background: var(--gray-100);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.chart-bar-fill {
    height: 100%;
    transition: width 0.5s ease;
    min-width: 2px;
}

.chart-bar-fill.prompt {
    background: var(--primary);
    opacity: 0.85;
}

.chart-bar-fill.completion {
    background: var(--purple);
    opacity: 0.85;
}

.chart-bar-value {
    width: 60px;
    flex-shrink: 0;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--gray-600);
    font-family: var(--font-mono);
    text-align: right;
}

.chart-legend {
    display: flex;
    gap: 20px;
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--gray-200);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.78rem;
    color: var(--gray-500);
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 2px;
}

.legend-dot.prompt {
    background: var(--primary);
}

.legend-dot.completion {
    background: var(--purple);
}

/* --- Cost Breakdown --- */
.cost-unavailable {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 14px 16px;
    background: rgba(252, 185, 0, 0.06);
    border: 1px solid rgba(252, 185, 0, 0.2);
    border-radius: var(--radius);
    color: var(--gray-600);
    font-size: 0.85rem;
    line-height: 1.5;
}

.cost-unavailable svg {
    flex-shrink: 0;
    color: var(--orange);
    margin-top: 2px;
}

.cost-breakdown-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-600);
    margin-bottom: 12px;
}

.cost-meter-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.cost-meter-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    background: var(--gray-50);
    font-size: 0.85rem;
}

.cost-meter-item.cost-meter-total {
    background: rgba(14, 143, 133, 0.06);
    border: 1px solid rgba(14, 143, 133, 0.15);
    margin-top: 4px;
}

.cost-meter-name {
    color: var(--gray-600);
}

.cost-meter-value {
    font-family: var(--font-mono);
    font-weight: 500;
    color: var(--green);
}

/* Responsive */
@media (max-width: 768px) {
    .consumption-controls {
        flex-direction: column;
        align-items: stretch;
    }
    .consumption-quick-range {
        margin-left: 0;
    }
    .consumption-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    .chart-bar-label {
        width: 90px;
        font-size: 0.75rem;
    }
}

@media (max-width: 480px) {
    .consumption-cards {
        grid-template-columns: 1fr;
    }
    .consumption-date-range {
        flex-direction: column;
        align-items: stretch;
    }
    .date-separator {
        display: none;
    }
}

/* ===================================================
   Responsive
   =================================================== */

/* Tablet: collapse sidebar */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: -260px;
        top: 0;
        height: 100vh;
        box-shadow: var(--shadow-xl);
        transition: left 0.25s ease;
        z-index: 200;
    }

    .sidebar.open {
        left: 0;
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.4);
        z-index: 190;
    }

    .sidebar-overlay.visible {
        display: block;
    }

    .mobile-topbar {
        display: flex;
    }

    .chat-header-left .chat-brand { display: none; }
}

/* Phone: tighter spacing */
@media (max-width: 640px) {
    .chat-header { padding: 0 10px; }
    .welcome-suggestions { grid-template-columns: 1fr; }
    .chat-welcome h2 { font-size: 1.3rem; }
    .chat-input-area { padding: 0 10px 8px; }
    .msg-content { padding: 0 10px; }

    .model-btn span#model-name {
        max-width: 100px;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .model-dropdown {
        left: 0;
        transform: none;
        min-width: calc(100vw - 260px);
    }

    .auth-card { padding: 32px 24px; }
    .auth-title { font-size: 1.3rem; }

    .page-header { padding: 16px 16px 12px; }
    .page-body { padding: 16px; }
}

@media (max-width: 400px) {
    .icon-btn:not(#theme-toggle):not(#sidebar-toggle) { display: none; }
}

/* ===================================================
   Error + Utility
   =================================================== */
.msg-error {
    color: var(--red);
    background: rgba(255, 0, 57, 0.06);
    border: 1px solid rgba(255, 0, 57, 0.15);
    border-radius: var(--radius);
    padding: 12px 16px;
    font-size: 0.88rem;
}

.msg-bubble table {
    border-collapse: collapse;
    width: 100%;
    margin: 12px 0;
    font-size: 0.88rem;
}

.msg-bubble th,
.msg-bubble td {
    border: 1px solid var(--gray-200);
    padding: 8px 12px;
    text-align: left;
}

.msg-bubble th {
    background: var(--gray-100);
    font-weight: 600;
}

.code-block-wrapper {
    position: relative;
}

.code-copy-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 4px 10px;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: var(--radius-sm);
    color: var(--code-color);
    font-size: 0.72rem;
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition);
}

.code-block-wrapper:hover .code-copy-btn {
    opacity: 1;
}

.code-copy-btn:hover {
    background: rgba(255,255,255,0.2);
}