/* CodeSam Design System - Blue Gradient Theme */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Brand Colors - Blue Gradient */
    --primary: #2563eb;
    --primary-container: #1d4ed8;
    --on-primary: #ffffff;
    --secondary: #60a5fa;
    --secondary-container: #93c5fd;
    --on-secondary: #1e3a8a;
    --tertiary: #3b82f6;
    --tertiary-container: #60a5fa;

    /* Surface Colors */
    --surface: #f8fafc;
    --surface-container-lowest: #ffffff;
    --surface-container-low: #f1f5f9;
    --surface-container: #e2e8f0;
    --surface-container-high: #dbeafe;
    --surface-variant: #cbd5e1;
    --background: linear-gradient(135deg, #eff6ff 0%, #ffffff 50%, #dbeafe 100%);

    /* Text Colors */
    --on-surface: #1e293b;
    --on-surface-variant: #475569;
    --on-background: #1e293b;

    /* Borders & Outlines */
    --outline: #94a3b8;
    --outline-variant: #e2e8f0;

    /* Semantic Colors */
    --success: #16a34a;
    --warning: #ca8a04;
    --danger: #dc2626;
    --error: #dc2626;
    --error-container: #fee2e2;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 20px;
    --spacing-xl: 28px;
    --spacing-xxl: 40px;

    /* Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Shadows */
    --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 -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

    /* Transitions */
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #eff6ff 0%, #ffffff 50%, #dbeafe 100%);
    color: var(--on-surface);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    font-size: 14px;
    padding: 0 20px 20px 20px;
    transition: var(--transition);
}

body.dark {
    --primary: #60a5fa;
    --primary-container: #3b82f6;
    --secondary: #93c5fd;
    --surface: #0f172a;
    --surface-container-lowest: #1e293b;
    --surface-container-low: #1e293b;
    --surface-container: #334155;
    --surface-container-high: #475569;
    --surface-variant: #334155;
    --background: #0f172a;
    --on-surface: #e2e8f0;
    --on-surface-variant: #94a3b8;
    --on-background: #e2e8f0;
    --outline: #475569;
    --outline-variant: #334155;
    background: #0f172a;
}

/* Top Navigation Banner */
.top-banner {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--outline-variant);
    box-shadow: var(--shadow-sm);
    margin: 0 -20px;
    padding: 0 20px;
}

body.dark .top-banner {
    background: rgba(30, 41, 59, 0.92);
}

.top-banner-inner {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
}

.top-banner-brand {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    transition: opacity 0.2s;
}

.top-banner-brand:hover {
    opacity: 0.8;
    text-decoration: none;
}

.top-banner-links {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
}

.top-banner-links .nav-user {
    color: var(--on-surface-variant);
    font-weight: 500;
}

.top-banner-links a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.top-banner-links a:hover {
    text-decoration: underline;
}

.top-banner-links .logout-btn {
    padding: 6px 14px;
    background: var(--danger);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

.top-banner-links .logout-btn:hover {
    background: #b91c1c;
    text-decoration: none;
}

@media (max-width: 768px) {
    .top-banner-inner {
        flex-direction: column;
        height: auto;
        padding: 10px 0;
        gap: 8px;
    }

    .top-banner-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 8px;
    }
}

/* Banner icon buttons (theme toggle, key toggle) */
.banner-icon-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid var(--outline-variant);
    background: var(--surface-container-lowest);
    color: var(--on-surface);
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.banner-icon-btn:hover {
    background: var(--surface-container);
    transform: scale(1.1);
}

.provider-badge-inline {
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 500;
    background: var(--surface-container);
    border: 1px solid var(--outline-variant);
    color: var(--on-surface);
}

/* Container */
.container {
    background: var(--surface-container-lowest);
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    max-width: 1000px;
    margin: 0 auto;
    padding: 40px;
    position: relative;
    border-top: none;
}

.main-container {
    margin-top: 24px;
}

/* Typography */
h1 {
    color: var(--on-surface);
    margin-bottom: 8px;
    font-size: 32px;
    font-weight: 700;
    text-align: center;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

body.dark h1 {
    background: linear-gradient(135deg, #60a5fa, #93c5fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--on-surface-variant);
    margin-bottom: 40px;
    font-size: 15px;
    font-weight: 400;
    text-align: center;
}

h3 {
    color: var(--on-surface);
    margin-bottom: 20px;
    font-size: 18px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 12px;
}

h3::before {
    content: '';
    width: 4px;
    height: 20px;
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    border-radius: 2px;
}

/* Theme Toggle (auth pages only) */
.theme-toggle {
    position: fixed;
    top: 12px;
    right: 20px;
    background: var(--surface-container-lowest);
    border: 1px solid var(--outline-variant);
    color: var(--on-surface);
    width: 38px;
    height: 38px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    font-size: 16px;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

/* Form Section */
.form-section {
    margin-bottom: 24px;
    padding: 24px;
    background: var(--surface-container-lowest);
    border-radius: var(--radius-xl);
    border: 1px solid var(--outline-variant);
    transition: var(--transition);
    box-shadow: var(--shadow);
}

/* Textarea */
textarea {
    width: 100%;
    padding: 14px 16px;
    font-size: 14px;
    font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
    border: 1px solid var(--outline-variant);
    background: var(--surface-container-lowest);
    color: var(--on-surface);
    border-radius: var(--radius-md);
    transition: var(--transition);
    resize: vertical;
    min-height: 200px;
    line-height: 1.6;
    margin-bottom: 16px;
}

textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

textarea::placeholder {
    color: var(--on-surface-variant);
    font-family: 'Inter', sans-serif;
    font-size: 14px;
}

/* Buttons */
.input-group {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.add-btn, .control-btn {
    padding: 10px 20px;
    font-size: 13px;
    font-weight: 600;
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    color: var(--on-primary);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.add-btn:hover {
    background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.add-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.control-btn {
    background: var(--danger);
    color: white;
}

.control-btn:hover {
    background: #A82828;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.hint {
    margin-top: 12px;
    font-size: 12px;
    color: var(--on-surface-variant);
}

/* Loading */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 40px;
    color: var(--on-surface-variant);
    font-size: 15px;
}

.spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--outline-variant);
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Explanation Output */
.explanation-content {
    line-height: 1.7;
    font-size: 14px;
}

.explanation-content h1,
.explanation-content h2,
.explanation-content h3,
.explanation-content h4 {
    margin-top: 20px;
    margin-bottom: 10px;
    color: var(--on-surface);
    display: block;
}

.explanation-content h1::before,
.explanation-content h2::before,
.explanation-content h3::before,
.explanation-content h4::before {
    display: none;
}

.explanation-content p {
    margin-bottom: 10px;
    color: var(--on-surface-variant);
}

.explanation-content ul {
    margin: 10px 0;
    padding-left: 20px;
}

.explanation-content li {
    margin-bottom: 6px;
    color: var(--on-surface-variant);
}

.explanation-content pre {
    background: #1e1e2e;
    color: #cdd6f4;
    padding: 14px 18px;
    border-radius: var(--radius-lg);
    overflow-x: auto;
    margin: 14px 0;
    font-size: 13px;
    line-height: 1.5;
}

.explanation-content code {
    background: var(--surface-container);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
}

.explanation-content pre code {
    background: none;
    padding: 0;
}

.explanation-content strong {
    color: var(--on-surface);
}

/* Status Messages */
.status-message {
    padding: 12px 20px;
    margin-top: 16px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    display: none;
    animation: fadeIn 0.3s ease;
}

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

.status-message.success {
    background: rgba(45, 138, 94, 0.08);
    color: var(--success);
    border: 1px solid var(--success);
    display: block;
}

.status-message.error {
    background: var(--error-container);
    color: var(--error);
    border: 1px solid var(--error);
    display: block;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 20px;
        margin: 10px;
    }

    h1 { font-size: 24px; }
    .subtitle { font-size: 14px; }

    .input-group {
        flex-direction: column;
        align-items: stretch;
    }

    .add-btn, .control-btn { width: 100%; }
    .theme-toggle { width: 38px; height: 38px; top: 12px; right: 12px; }
}

/* =========================================
   Auth Pages (Login / Register)
   ========================================= */

.auth-container {
    max-width: 500px;
    margin-top: 40px;
}

.field-group {
    margin-bottom: 18px;
}

.field-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--on-surface);
    margin-bottom: 6px;
}

.field-group input[type="text"],
.field-group input[type="email"],
.field-group input[type="password"] {
    width: 100%;
    padding: 10px 14px;
    font-size: 14px;
    font-family: 'Inter', sans-serif;
    border: 1px solid var(--outline-variant);
    background: var(--surface-container-lowest);
    color: var(--on-surface);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.field-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.field-group input::placeholder {
    color: var(--on-surface-variant);
    font-size: 13px;
}

.field-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

@media (max-width: 480px) {
    .field-row { grid-template-columns: 1fr; }
}

/* Password visibility toggle */
.password-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.password-wrapper input { padding-right: 48px; }

.toggle-pw {
    position: absolute;
    right: 10px;
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 16px;
    padding: 4px;
    line-height: 1;
    color: var(--on-surface-variant);
    transition: color 0.2s;
}

.toggle-pw:hover { color: var(--primary); }

.required { color: var(--error); font-weight: 700; }

.auth-footer {
    text-align: center;
    margin-top: 20px;
    font-size: 13px;
    color: var(--on-surface-variant);
}

.auth-footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.auth-footer a:hover { text-decoration: underline; }

/* Nav bar */
.app-nav {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    font-size: 13px;
    flex-wrap: nowrap;
    overflow: visible;
}

.app-nav .nav-user { color: var(--on-surface-variant); }

.app-nav a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.app-nav a:hover { text-decoration: underline; }

.app-nav .logout-btn {
    padding: 6px 14px;
    background: var(--danger);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

.app-nav .logout-btn:hover {
    background: #A82828;
    text-decoration: none;
}

/* =========================================
   BYOK Chat Interface
   ========================================= */

.chat-container {
    max-width: 900px;
    border-top: none;
    padding: 0;
    overflow: hidden;
}

.chat-wrapper {
    display: flex;
    flex-direction: column;
    height: 70vh;
    background: var(--surface-container-lowest);
    border-radius: var(--radius-xl);
    border: 1px solid var(--outline-variant);
    overflow: hidden;
}

.chat-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--outline-variant);
    background: var(--surface-container-lowest);
    text-align: center;
    flex-shrink: 0;
}

.chat-header h2 {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}

.chat-header p {
    font-size: 13px;
    color: var(--on-surface-variant);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px 24px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    background: var(--surface-container-low);
}

.chat-messages::-webkit-scrollbar { width: 5px; }
.chat-messages::-webkit-scrollbar-track { background: transparent; }
.chat-messages::-webkit-scrollbar-thumb { background: var(--outline-variant); border-radius: 3px; }

/* Chat Bubbles */
.chat-bubble {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    max-width: 85%;
    animation: fadeIn 0.3s ease;
}

.chat-bubble.user {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.chat-bubble.assistant,
.chat-bubble.error {
    align-self: flex-start;
}

.bubble-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
    background: var(--surface-container);
}

.bubble-content {
    padding: 10px 14px;
    border-radius: 14px;
    line-height: 1.6;
    font-size: 14px;
}

.chat-bubble.user .bubble-content {
    background: var(--primary);
    color: var(--on-primary);
    border-bottom-right-radius: 4px;
}

.chat-bubble.assistant .bubble-content {
    background: var(--surface-container-lowest);
    color: var(--on-surface);
    border: 1px solid var(--outline-variant);
    border-bottom-left-radius: 4px;
}

.chat-bubble.error .bubble-content {
    background: var(--error-container);
    color: var(--error);
    border: 1px solid var(--error);
    border-bottom-left-radius: 4px;
}

.bubble-content p { margin: 0; white-space: pre-wrap; word-wrap: break-word; }

.model-tag {
    display: block;
    text-align: right;
    font-size: 10px;
    color: var(--on-surface-variant);
    margin-top: 6px;
    font-style: italic;
}

/* Typing Indicator */
.typing-dots {
    display: flex;
    gap: 4px;
    padding: 4px 0;
}

.typing-dots span {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--on-surface-variant);
    animation: typingBounce 1.4s infinite ease-in-out;
}

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

@keyframes typingBounce {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-5px); opacity: 1; }
}

/* Chat Input */
.chat-input-area {
    padding: 14px 24px 18px;
    border-top: 1px solid var(--outline-variant);
    background: var(--surface-container-lowest);
    flex-shrink: 0;
}

.chat-input-row {
    display: flex;
    gap: 10px;
    align-items: center;
}

#userMessage {
    flex: 1;
    padding: 12px 18px;
    font-size: 14px;
    border: 1px solid var(--outline-variant);
    background: var(--surface-container-low);
    color: var(--on-surface);
    border-radius: var(--radius-full);
    transition: var(--transition);
    font-family: inherit;
    outline: none;
}

#userMessage:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

#userMessage::placeholder { color: var(--on-surface-variant); }

.send-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: none;
    background: var(--primary);
    color: var(--on-primary);
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.send-btn:hover { background: var(--primary-container); transform: scale(1.05); }
.send-btn:active { transform: scale(0.95); }
.send-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* Key Toggle */
.key-toggle {
    position: fixed;
    top: 20px;
    right: 74px;
    background: var(--surface-container-lowest);
    border: 1px solid var(--outline-variant);
    color: var(--on-surface);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    font-size: 18px;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
}

.key-toggle:hover { transform: scale(1.1); }

/* Provider Badge */
.provider-badge {
    position: fixed;
    top: 24px;
    right: 130px;
    background: var(--surface-container-lowest);
    border: 1px solid var(--outline-variant);
    color: var(--on-surface);
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 500;
    z-index: 100;
    box-shadow: var(--shadow);
}

/* API Key Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.modal-box {
    background: var(--surface-container-lowest);
    border-radius: var(--radius-xl);
    padding: 28px;
    width: 400px;
    max-width: 90%;
    box-shadow: var(--shadow-lg);
    border-top: none;
}

.modal-box h3 {
    margin-bottom: 12px;
    font-size: 16px;
}

.modal-box input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-md);
    font-size: 14px;
    margin-top: 10px;
    outline: none;
    transition: var(--transition);
    background: var(--surface-container-low);
    color: var(--on-surface);
}

.modal-box input:focus { border-color: var(--primary); }

.key-status { font-size: 13px; margin-bottom: 4px; }
.key-status.configured { color: var(--success); }
.key-status.not-configured { color: var(--error); }

.modal-actions {
    margin-top: 16px;
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.modal-btn {
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: var(--transition);
}

.save-btn { background: var(--primary); color: var(--on-primary); }
.save-btn:hover { background: var(--primary-container); }
.cancel-btn { background: var(--surface-container); color: var(--on-surface-variant); }
.cancel-btn:hover { background: var(--surface-variant); }
.clear-btn { background: var(--error-container); color: var(--error); }
.clear-btn:hover { background: #fecaca; }

/* Markdown rendered content in chat */
.markdown-body h1, .markdown-body h2, .markdown-body h3,
.markdown-body h4, .markdown-body h5, .markdown-body h6 {
    margin: 10px 0 6px 0;
    font-weight: 600;
}
.markdown-body h1 { font-size: 1.3em; }
.markdown-body h2 { font-size: 1.15em; }
.markdown-body h3 { font-size: 1.05em; }
.markdown-body p { margin: 6px 0; }
.markdown-body ul, .markdown-body ol { padding-left: 18px; margin: 6px 0; }
.markdown-body li { margin: 3px 0; }
.markdown-body code {
    background: var(--surface-container);
    padding: 2px 5px;
    border-radius: var(--radius-sm);
    font-size: 0.9em;
}
.markdown-body pre {
    background: #1e1e2e;
    color: #cdd6f4;
    padding: 12px;
    border-radius: var(--radius-lg);
    overflow-x: auto;
    margin: 8px 0;
}
.markdown-body pre code { background: none; padding: 0; color: inherit; }
.markdown-body strong { font-weight: 600; }

/* Tab Navigation */
.tab-nav {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--outline-variant);
    padding-bottom: 0;
}

.tab-btn {
    padding: 10px 20px;
    font-size: 13px;
    font-weight: 500;
    background: transparent;
    color: var(--on-surface-variant);
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: -1px;
}

.tab-btn:hover {
    color: var(--primary);
    background: var(--surface-container-low);
}

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 600;
}

.tab-content { display: none; }
.tab-content.active { display: block; }

/* =========================================
   Settings Page
   ========================================= */

.settings-container {
    max-width: 1100px;
}

.settings-desc {
    font-size: 13px;
    color: var(--on-surface-variant);
    margin: -8px 0 20px;
    line-height: 1.6;
}

.settings-note {
    font-size: 11px;
    color: var(--on-surface-variant);
    font-weight: 400;
}

/* Cadence option cards */
.cadence-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: 8px;
}

@media (max-width: 600px) {
    .cadence-options { grid-template-columns: 1fr; }
}

.cadence-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 18px 12px;
    border: 2px solid var(--outline-variant);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition);
    background: var(--surface-container-lowest);
    text-align: center;
    position: relative;
}

.cadence-card input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.cadence-card:hover {
    border-color: var(--primary);
    background: var(--surface-container-low);
}

.cadence-card.selected {
    border-color: var(--primary);
    background: rgba(37, 99, 235, 0.05);
}

body.dark .cadence-card.selected {
    background: rgba(96, 165, 250, 0.12);
}

.cadence-icon {
    font-size: 26px;
    line-height: 1;
}

.cadence-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--on-surface);
}

.cadence-desc {
    font-size: 11px;
    color: var(--on-surface-variant);
    line-height: 1.4;
}

/* Toggle switch */
.toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.toggle-label {
    font-size: 13px;
    font-weight: 500;
    color: var(--on-surface);
}

.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
}

.switch input { opacity: 0; width: 0; height: 0; }

.slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background: var(--outline-variant);
    border-radius: var(--radius-full);
    transition: 0.3s;
}

.slider::before {
    content: "";
    position: absolute;
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: 0.3s;
}

.switch input:checked + .slider { background: var(--primary); }
.switch input:checked + .slider::before { transform: translateX(20px); }

/* Time picker row */
.time-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.time-sep {
    font-weight: 700;
    font-size: 16px;
    color: var(--on-surface-variant);
}

/* Select inputs */
.settings-select {
    width: 100%;
    padding: 10px 14px;
    font-size: 14px;
    font-family: 'Inter', sans-serif;
    border: 1px solid var(--outline-variant);
    background: var(--surface-container-lowest);
    color: var(--on-surface);
    border-radius: var(--radius-md);
    transition: var(--transition);
    cursor: pointer;
    appearance: auto;
}

.settings-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.settings-select-sm {
    width: 90px;
}

.settings-input-sm {
    width: 90px;
    padding: 10px 14px;
    font-size: 14px;
    font-family: 'Inter', sans-serif;
    border: 1px solid var(--outline-variant);
    background: var(--surface-container-lowest);
    color: var(--on-surface);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.settings-input-sm:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Settings modal */
.settings-modal {
    width: 480px;
}

/* ---- Settings table (admin user list) ---- */
.settings-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.settings-table th,
.settings-table td {
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--outline-variant);
    vertical-align: middle;
}

.settings-table th {
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    color: var(--on-surface-variant);
    background: var(--surface-container-low);
}

.settings-table tr:hover td {
    background: var(--surface-container-low);
}

.role-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.role-admin {
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
}

body.dark .role-admin {
    background: rgba(96, 165, 250, 0.2);
}

.role-user {
    background: var(--surface-container);
    color: var(--on-surface-variant);
}

.cadence-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 500;
    background: rgba(37, 99, 235, 0.08);
    color: var(--primary);
}

.cadence-none {
    background: var(--surface-container);
    color: var(--on-surface-variant);
}

.status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 5px;
    vertical-align: middle;
}

.status-dot.active   { background: var(--success); }
.status-dot.inactive { background: var(--outline); }

.edit-user-btn {
    padding: 5px 12px;
    font-size: 12px;
}

/* Settings gear icon in nav */
.nav-settings-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 14px;
    background: var(--surface-container);
    color: var(--on-surface);
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-md);
    font-size: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

.nav-settings-btn:hover {
    background: var(--surface-container-high);
    text-decoration: none;
    color: var(--primary);
    border-color: var(--primary);
}

/* =========================================
   Settings Nav Dropdown
   ========================================= */

.nav-dropdown {
    position: relative;
    display: inline-block;
}

.nav-dropdown-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 14px;
    background: var(--surface-container);
    color: var(--on-surface);
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-md);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
    font-family: inherit;
}

.nav-dropdown-btn:hover,
.nav-dropdown-btn.active {
    background: var(--surface-container-high);
    color: var(--primary);
    border-color: var(--primary);
    text-decoration: none;
}

.nav-dropdown-btn .chevron {
    width: 12px;
    height: 12px;
    transition: transform 0.2s ease;
    flex-shrink: 0;
}

.nav-dropdown-btn.active .chevron {
    transform: rotate(180deg);
}

.nav-dropdown-menu {
    display: none;
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    min-width: 220px;
    background: var(--surface-container-lowest);
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.14);
    z-index: 9999;
    overflow: hidden;
}

.nav-dropdown-menu.open {
    display: block;
    animation: dropdownFadeIn 0.15s ease;
}

@keyframes dropdownFadeIn {
    from { opacity: 0; transform: translateY(-6px); }
    to   { opacity: 1; transform: translateY(0); }
}

.nav-dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--on-surface);
    text-decoration: none;
    transition: background 0.15s;
    border-bottom: 1px solid var(--outline-variant);
}

.nav-dropdown-item:last-child {
    border-bottom: none;
}

.nav-dropdown-item:hover {
    background: var(--surface-container-low);
    color: var(--primary);
    text-decoration: none;
}

.nav-dropdown-item-icon {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    background: var(--surface-container);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    color: var(--primary);
    flex-shrink: 0;
}

.nav-dropdown-item-text {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.nav-dropdown-item-label {
    font-size: 13px;
    font-weight: 600;
    color: inherit;
}

.nav-dropdown-item-desc {
    font-size: 11px;
    color: var(--on-surface-variant);
}

/* User icon button (profile/account trigger) */
.nav-user-icon-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid var(--outline-variant);
    background: var(--surface-container-lowest);
    color: var(--on-surface-variant);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    padding: 0;
}

.nav-user-icon-btn:hover,
.nav-user-icon-btn.active {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--surface-container-low);
}

/* Danger-styled dropdown item (sign out) */
.nav-dropdown-item-danger:hover {
    background: var(--error-container);
    color: var(--error);
}

.nav-dropdown-icon-danger {
    background: var(--error-container) !important;
    color: var(--error) !important;
}

/* Button items in dropdown (theme, BYOK) */
button.nav-dropdown-item {
    width: 100%;
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    font-family: inherit;
}