/* ==========================================================================
   Theme Variables — Datably Design Language
   ========================================================================== */
:root {
    /* ── Datably Palette ── */
    --bg: #0A0A0C;
    --bg-elevated: #111114;
    --bg-card: #16161A;
    --surface: #1C1C22;
    --border: rgba(255,255,255,0.06);
    --text: #E8E6E3;
    --text-secondary: #8A8A8E;
    --text-dim: #5A5A5E;
    --accent: #6C9CFF;
    --accent-glow: rgba(108,156,255,0.15);
    --accent-secondary: #A78BFA;
    --green: #34D399;
    --serif: 'Instrument Serif', Georgia, serif;
    --sans: 'DM Sans', system-ui, -apple-system, sans-serif;

    /* ── Backward-compatible aliases (portal / chat components) ── */
    --bg-nav: var(--bg-elevated);
    --bg-primary: var(--bg);
    --bg-secondary: var(--bg-elevated);
    --bg-tertiary: var(--surface);
    --bg-darker: var(--bg);
    --user-bubble-bg: var(--surface);
    --ai-bubble-bg: var(--bg-elevated);
    --user-bubble-text: var(--text);
    --ai-bubble-text: var(--text);
    --text-primary: var(--text);
    --text-muted: var(--text-dim);
    --text-light: var(--text);
    --accent-color: var(--accent);
    --accent-color-dark: #4a7aff;
    --border-color: rgba(255,255,255,0.08);

    /* Layout */
    --navbar-height: 56px;
    --sidebar-width: 5rem;
    --sidebar-expanded-width: 12rem;
    --chat-max-width: 80%;

    /* Spacing */
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1.125rem;

    /* Transitions */
    --transition-standard: all 0.5s ease-in-out;
    --transition-fast: all 0.3s ease;
    --transition-opacity: opacity 0.5s ease-in-out;

    /* Z-index Stack (from lowest to highest) */
    --z-base: 1;
    --z-content: 10;
    --z-dropdown: 1000;
    --z-sidebar: 1050;
    --z-navbar: 1100;
    --z-modal: 1200;
    --z-tooltip: 1300;
}

/* Override Bootstrap 5's smooth scrolling — prevents visible scroll-through
   of the 300vh scroll showcase when jumping to anchors and eliminates the
   scroll-up flash on SPA page transitions. */
html {
    scroll-behavior: auto !important;
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* Hide Dash's built-in loading spinner during page transitions */
._dash-loading-callback,
._dash-loading {
    display: none !important;
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */
.flex-column {
    display: flex;
    flex-direction: column;
}

.flex-row {
    display: flex;
    flex-direction: row;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.full-width {
    width: 100%;
}

.full-height {
    height: 100%;
}

.transform-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.transform-center-y {
    /* Overridden for portal: parent flexbox handles centering.
       Kept as a class so callbacks can remove it during transition. */
}

.transform-gpu {
    transform: translateZ(0);
    will-change: transform;
    backface-visibility: hidden;
}

/* Animation */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Layout Components
   ========================================================================== */
.app-container {
    position: relative;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    padding-top: var(--navbar-height);
}

/* ── Datably Navbar ── */
.datably-navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    z-index: var(--z-navbar);
    padding: 0 2.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background: rgba(10, 10, 12, 0.8);
    border-bottom: 1px solid var(--border);
}

.nav-brand-link {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none !important;
}

.nav-brand-text {
    font-family: var(--serif);
    font-size: 1.35rem;
    color: var(--text);
    letter-spacing: -0.02em;
}

.nav-links-list {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-link-item {
    color: var(--text-secondary);
    text-decoration: none !important;
    font-size: 0.875rem;
    font-weight: 400;
    transition: color 0.2s;
    letter-spacing: 0.02em;
}

.nav-link-item:hover {
    color: var(--text);
}

.nav-cta {
    background: var(--accent) !important;
    color: #0A0A0C !important;
    padding: 0.55rem 1.3rem;
    border-radius: 6px;
    font-weight: 600 !important;
    font-size: 0.78rem !important;
    letter-spacing: 0.04em !important;
    text-transform: uppercase;
    transition: transform 0.2s, box-shadow 0.2s;
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px var(--accent-glow);
    color: #0A0A0C !important;
}

/* Hamburger button — hidden on desktop, shown on mobile */
.nav-hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: calc(var(--z-navbar) + 1);
    -webkit-tap-highlight-color: transparent;
}

.hamburger-icon {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    position: relative;
    transition: background 0.2s;
}

.hamburger-icon::before,
.hamburger-icon::after {
    content: '';
    position: absolute;
    left: 0;
    width: 22px;
    height: 2px;
    background: var(--text);
    transition: transform 0.3s ease, top 0.3s ease;
}

.hamburger-icon::before { top: -7px; }
.hamburger-icon::after  { top: 7px; }

/* Animate to X when open */
.datably-navbar.nav-open .hamburger-icon {
    background: transparent;
}

.datably-navbar.nav-open .hamburger-icon::before {
    top: 0;
    transform: rotate(45deg);
}

.datably-navbar.nav-open .hamburger-icon::after {
    top: 0;
    transform: rotate(-45deg);
}

@media (max-width: 600px) {
    .datably-navbar { padding: 0 1.25rem; }
    .nav-links-list { gap: 1rem; }
}

/* ── Main Content (no sidebar) ── */
.content {
    position: relative;
    margin-left: 0;
    padding: var(--spacing-xl);
    min-height: calc(100vh - var(--navbar-height));
    background-color: var(--bg);
    z-index: var(--z-content);
}

/* ==========================================================================
   Component Styles
   ========================================================================== */
/* Container Components */
.paper-container {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    background-color: var(--bg-primary);
    /* border: 1px solid var(--border-color); */ /* Removed border for seamless background blend */
}

.paper-container-shadow {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Chat Component */
.chat-container {
    position: relative;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    z-index: var(--z-base);
}

.chat-history {
    background-color: var(--bg-primary);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    height: 60vh; /* Matches container_height in create_chat_interface */
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
    transition: var(--transition-standard);
}

/* Welcome Header — see Portal Page section below for full styles */

/* Message Bubbles */
.message-container {
    display: flex;
    flex-direction: column;
    max-width: var(--chat-max-width);
    animation: fadeIn 0.3s ease;
}

.message-bubble {
    display: flex;
}

.message-content {
    padding: 12px 18px;
    border-radius: var(--radius-xl);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Remove extra spacing from Markdown content within message bubbles */
.message-content p {
    margin: 0 !important;
    padding: 0 !important;
}

.message-content > div > p {
    margin: 0 !important;
    padding: 0 !important;
}

/* User-specific styles */
.user-container {
    align-self: flex-end;
    margin-left: auto;
}

.user-message .message-content {
    background-color: var(--user-bubble-bg);
    color: var(--user-bubble-text);
    border-bottom-right-radius: 5px;
}

/* AI-specific styles */
.ai-container {
    align-self: flex-start;
    margin-right: auto;
}

.ai-message .message-content {
    background-color: var(--ai-bubble-bg);
    color: var(--ai-bubble-text);
    border-bottom-left-radius: 5px;
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    margin-right: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-tertiary);
    font-weight: bold;
}

.user-message .message-avatar {
    background-color: var(--accent-color);
}

.message-time {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
    text-align: right;
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    margin-top: 8px;
    margin-bottom: 8px;
}

.typing-indicator-bubble {
    display: flex;
    align-items: center;
    background-color: var(--ai-bubble-bg);
    padding: 10px 18px;
    border-radius: var(--radius-xl);
    border-bottom-left-radius: 5px;
    max-width: 100px;
}

#typing-dots {
    display: flex;
    gap: 4px;
}

#typing-dots .dot {
    width: 8px;
    height: 8px;
    background-color: var(--text-secondary);
    border-radius: 50%;
    animation: blink 1.5s infinite;
}

#typing-dots .dot:nth-child(2) {
    animation-delay: 0.2s;
}

#typing-dots .dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes blink {
    0% { opacity: 0.3; }
    50% { opacity: 1; }
    100% { opacity: 0.3; }
}

/* ==========================================================================
   Progress Indicator — Terminal-style with step accumulation
   ========================================================================== */
.progress-indicator {
    margin: 12px 0;
    animation: fadeIn 0.3s ease;
}

/* Terminal card */
.progress-terminal {
    background: var(--bg-card, #16161A);
    border: 1px solid var(--border, rgba(255,255,255,0.06));
    border-radius: var(--radius-lg, 12px);
    overflow: hidden;
    max-width: 400px;
}

.progress-terminal-header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 14px;
    background: rgba(255,255,255,0.02);
    border-bottom: 1px solid var(--border, rgba(255,255,255,0.06));
}

.terminal-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.terminal-dot.td-red { background: #FF5F57; }
.terminal-dot.td-yellow { background: #FEBC2E; }
.terminal-dot.td-green { background: #28C840; }

.progress-terminal-body {
    padding: 14px 16px;
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    font-size: 0.8rem;
    line-height: 1.7;
}

.progress-comment {
    color: var(--text-dim, #5A5A5E);
    font-style: italic;
    margin-bottom: 4px;
}

.progress-completed-steps {
    display: flex;
    flex-direction: column;
}

.progress-completed-line {
    color: var(--green, #34D399);
    white-space: nowrap;
}

.progress-check {
    color: var(--green, #34D399);
    font-weight: 600;
    margin-right: 2px;
}

.progress-current-step {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--accent, #6C9CFF);
    margin-top: 2px;
}

.progress-spinner-inline {
    flex-shrink: 0;
    width: 12px;
    height: 12px;
    border: 2px solid var(--text-dim, #5A5A5E);
    border-top-color: var(--accent, #6C9CFF);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.progress-current-label {
    color: var(--accent, #6C9CFF);
}

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

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.3s ease;
}

/* Form Elements */
.chat-input-container {
    position: relative;
    margin-top: var(--spacing-md);
    transition: var(--transition-standard);
    width: 100%;
}

.form-element {
    background-color: transparent;
    color: var(--text);
    border: none;
    border-radius: 0;
    padding: 0;
    width: 100%;
    font-size: 1rem;
    resize: none;
    min-height: 60px;
    transition: var(--transition-fast);
}

.form-element:focus {
    outline: none;
}

/* Chat Input Box with Arrow Button */
.chat-input-box {
    position: relative;
    width: 100%;
    display: flex;
    align-items: stretch;
}

.chat-input-textarea {
    width: 100%;
    padding-right: 3.5rem !important;
    border-radius: 16px !important;
    font-size: 1rem;
    background: var(--bg-elevated) !important;
    color: var(--text) !important;
    border: 1px solid var(--border) !important;
    min-height: 100px;
    box-shadow: none !important;
}

.chat-input-textarea textarea {
    min-height: 100px !important;
    border: none !important;
    outline: none !important;
    box-shadow: none !important;
    background: transparent !important;
}

.chat-input-arrow-btn {
    position: absolute;
    right: 1.1rem;
    bottom: 1.1rem;
    width: 2.2rem;
    height: 2.2rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 1px 4px rgba(30,30,30,0.10);
    cursor: pointer;
    transition: background 0.2s, box-shadow 0.2s;
    z-index: 2;
    font-size: 1.2rem;
    outline: none;
}

.chat-input-arrow-btn:hover, .chat-input-arrow-btn:focus {
    background: var(--bg-primary);
    box-shadow: 0 2px 8px rgba(30, 30, 30, 0.15);
}

/* Remove old submit button and public label styles */
.submit-public-section, .submit-public-label, .chat-submit-btn, .submit-arrow-circle { display: none !important; }

/* ==========================================================================
   Third-party Component Overrides
   ========================================================================== */
/* Mantine Component Overrides */
.mantine-Select-input {
    background-color: var(--bg-tertiary) !important;
    color: var(--text-primary) !important;
    border: none !important;
    border-radius: var(--radius-xl) !important;
    padding: 1rem 1.25rem !important;
    box-shadow: none !important;
}

.mantine-Textarea-input {
    background: transparent !important;
    color: var(--text) !important;
    border: none !important;
    border-radius: 0 !important;
    padding: 1rem 1.25rem !important;
    box-shadow: none !important;
    outline: none !important;
}

.mantine-Textarea-input:focus {
    outline: none !important;
    box-shadow: none !important;
    border: none !important;
}

.mantine-Select-dropdown {
    background-color: var(--bg-secondary) !important;
    border-color: var(--border-color) !important;
    z-index: var(--z-dropdown) !important;
}

.mantine-Select-item {
    color: var(--text-primary) !important;
}

.mantine-Select-item[data-selected] {
    background-color: var(--accent-color) !important;
}

/* Map Component */
.leaflet-container {
    border-radius: var(--radius-md);
    height: 70vh;
    z-index: var(--z-base);
    transform: translateZ(0);
    background: #f2efe9;
}

.map-container {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
    transform: translateZ(0);
    border-radius: var(--radius-md);
}

/* Zoom controls — clean styling for classic map tiles */
.leaflet-control-zoom a {
    background-color: #fff !important;
    color: #333 !important;
    border-color: rgba(0,0,0,0.15) !important;
}

.leaflet-control-zoom a:hover {
    background-color: #f4f4f4 !important;
}

/* Map card in viz panel — dark card with subtle border */
#right-content-container .mantine-Paper-root {
    background-color: var(--bg-card, #16161A) !important;
    border-color: var(--border, rgba(255,255,255,0.06)) !important;
}

/* Make map fill available height in viz panel */
#right-content-container {
    display: flex;
    flex-direction: column;
}

#right-content-container .map-container {
    flex: 1;
    min-height: 500px;
}

/* Dark-themed Mantine slider for legend */
#right-content-container .mantine-Slider-root {
    margin-top: var(--spacing-xs);
}

#right-content-container .mantine-Slider-bar {
    background: linear-gradient(90deg, #FFEDA0, #FED976, #FEB24C, #FD8D3C, #FC4E2A, #E31A1C, #BD0026, #800026);
}

#right-content-container .mantine-Slider-track {
    background-color: rgba(255,255,255,0.06);
}

#right-content-container .mantine-Slider-markLabel {
    color: var(--text-dim, #5A5A5E);
    font-size: 10px;
}

/* Map Feature Tooltips */
.feature-tooltip {
    background-color: var(--bg-secondary) !important;
    color: var(--text-primary) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: var(--radius-md) !important;
    padding: var(--spacing-sm) !important;
    font-family: inherit !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3) !important;
    max-height: 220px;
    overflow-y: auto; /* allow scrolling when content exceeds height */
    pointer-events: auto; /* enable mouse/trackpad scrolling */
}

.feature-tooltip::before {
    border-top-color: var(--border-color) !important;
}

.leaflet-tooltip-left.feature-tooltip::before {
    border-left-color: var(--border-color) !important;
}

.leaflet-tooltip-right.feature-tooltip::before {
    border-right-color: var(--border-color) !important;
}

/* Map Popups (click) */
.leaflet-popup-content-wrapper {
    background-color: var(--bg-secondary) !important;
    color: var(--text-primary) !important;
    border-radius: var(--radius-md) !important;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4) !important;
}

.leaflet-popup-content {
    margin: var(--spacing-sm) var(--spacing-md) !important;
    color: var(--text-primary) !important;
}

.leaflet-popup-tip {
    background-color: var(--bg-secondary) !important;
}

.leaflet-popup-close-button {
    color: var(--text-secondary) !important;
}

.leaflet-popup-close-button:hover {
    color: var(--text-primary) !important;
}

/* Force redraw on transitions for map containers */
#viz-container {
    transition: var(--transition-standard);
    will-change: width;
    transform: translateZ(0);
}

/* Chat Component Specific Layout */
#centered-chat-content {
    transition: var(--transition-standard);
    z-index: 5;
    width: 100%;
}

#history-container {
    transition: var(--transition-opacity), flex 0.5s ease-in-out, height 0.5s ease-in-out;
    flex: 1;
}

/* Collapse history container in initial state so centered content is truly centered */
#chat-container-wrapper:has(.centered) #history-container {
    flex: 0;
    height: 0;
    overflow: hidden;
}

#chat-container-wrapper {
    position: relative;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

#centered-chat-content.centered {
    position: relative;
    width: 90%;
    max-width: 720px;
    margin: 0 auto;
    top: auto;
    left: auto;
    transform: none;
}

/* Common transition utility classes */
.transition-standard {
    transition: var(--transition-standard);
}

.transition-fast {
    transition: var(--transition-fast);
}

.transition-opacity {
    transition: var(--transition-opacity);
}

/* Page title styling */
.page-title {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.page-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

/* Content spacing — handled in main .content rule above */

/* Paper container variations */
.paper-container-centered {
    max-width: 900px;
    margin: var(--spacing-xl) auto;
}

.paper-container-sm {
    padding: var(--spacing-sm);
}

/* Page container styling */
.page-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl);
}

/* ==========================================================================
   Home Page — Datably Redesign
   ========================================================================== */

@keyframes heroGlow {
    0%   { opacity: 0.4; transform: translateX(-50%) scale(1); }
    100% { opacity: 0.7; transform: translateX(-50%) scale(1.15); }
}
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0.4; }
}
@keyframes floatHint {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50%       { transform: translateX(-50%) translateY(-8px); }
}

/* Home page wrapper — compensate for .content padding */
.home-page-wrapper {
    padding: 0;
    margin: calc(-1 * var(--spacing-xl));
    margin-bottom: 0;
}

/* Hero */
.home-hero {
    position: relative;
    min-height: calc(100vh - var(--navbar-height));
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 7rem 2rem 5rem;
    overflow: hidden;
    background: var(--bg);
}
.home-hero::before {
    content: '';
    position: absolute;
    top: -40%;
    left: 50%;
    transform: translateX(-50%);
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    pointer-events: none;
    animation: heroGlow 8s ease-in-out infinite alternate;
    z-index: 1;
}
.hero-canvas {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 0;
    pointer-events: none;
}
.hero-content {
    position: relative;
    z-index: 2;
    max-width: 860px;
    margin: 0 auto;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 100px;
    padding: 0.4rem 1.2rem 0.4rem 0.6rem;
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    text-decoration: none;
    transition: border-color 0.2s;
    animation: fadeUp 0.8s ease-out both;
}
.hero-badge:hover { border-color: var(--accent); }
.hero-badge .pulse-dot {
    width: 7px; height: 7px;
    background: var(--green);
    border-radius: 50%;
    animation: pulse 2s infinite;
}
.hero-h1 {
    font-family: var(--serif) !important;
    font-size: clamp(2.8rem, 6vw, 5rem) !important;
    line-height: 1.05 !important;
    letter-spacing: -0.03em !important;
    color: var(--text) !important;
    font-weight: 400 !important;
    margin-bottom: 1.5rem !important;
    animation: fadeUp 0.8s ease-out 0.1s both;
}
.hero-h1 em {
    font-style: italic;
    color: var(--accent);
}
.hero-sub {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--text-secondary);
    max-width: 540px;
    line-height: 1.6;
    font-weight: 300;
    margin: 0 auto 2.5rem;
    animation: fadeUp 0.8s ease-out 0.2s both;
}
.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeUp 0.8s ease-out 0.3s both;
}
.hero-btn-primary {
    background: var(--accent);
    color: #0A0A0C !important;
    padding: 0.9rem 2.2rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    letter-spacing: 0.02em;
    transition: transform 0.2s, box-shadow 0.2s;
    border: none;
    cursor: pointer;
    font-family: var(--sans);
    display: inline-block;
}
.hero-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-glow);
    color: #0A0A0C !important;
    text-decoration: none;
}
.hero-btn-secondary {
    background: transparent;
    color: var(--text) !important;
    padding: 0.9rem 2.2rem;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.9rem;
    text-decoration: none;
    border: 1px solid var(--border);
    transition: border-color 0.2s, background 0.2s;
    font-family: var(--sans);
    display: inline-block;
}
.hero-btn-secondary:hover {
    border-color: rgba(255,255,255,0.15);
    background: var(--surface);
    color: var(--text) !important;
    text-decoration: none;
}
.hero-scroll-hint {
    position: absolute;
    bottom: 2.5rem;
    left: 50%;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-dim);
    font-size: 0.72rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    animation: floatHint 3s ease-in-out infinite;
}
.scroll-arrow-hint {
    width: 18px; height: 18px;
    border-right: 1.5px solid var(--text-dim);
    border-bottom: 1.5px solid var(--text-dim);
    transform: rotate(45deg);
}

/* Section label */
.section-label {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--accent);
    margin-bottom: 1.2rem;
    font-weight: 500;
    font-family: var(--sans);
}

/* Demo pills section */
.home-demo-section {
    padding: 5rem 2rem;
    text-align: center;
    border-top: 1px solid var(--border);
    background: var(--bg);
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.16,1,0.3,1), transform 0.8s cubic-bezier(0.16,1,0.3,1);
}
.home-demo-section.visible { opacity: 1; transform: translateY(0); }
.demo-pills {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    max-width: 800px;
    margin: 0 auto;
}
.demo-pill {
    padding: 0.7rem 1.8rem;
    border-radius: 100px;
    border: 1px solid var(--border);
    background: var(--surface);
    font-size: 0.85rem;
    color: var(--text-secondary) !important;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: border-color 0.2s, transform 0.2s;
    text-decoration: none !important;
    cursor: pointer;
    font-family: var(--sans);
}
.demo-pill:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    color: var(--text) !important;
}

/* Scroll showcase */
.home-scroll-showcase {
    position: relative;
    min-height: 300vh;
    background: var(--bg);
}
.scroll-sticky {
    position: sticky;
    top: var(--navbar-height);
    height: calc(100vh - var(--navbar-height));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.showcase-canvas-bg {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
}
#showcaseCanvas {
    width: 70%;
    max-width: 800px;
    aspect-ratio: 16/9;
    border-radius: 12px;
    border: 1px solid var(--border);
    box-shadow: 0 40px 80px rgba(0,0,0,0.5);
    background: var(--bg-card);
}
.scroll-text-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 5;
    pointer-events: none;
}
/* Single card — fixed dimensions, no backdrop-filter (causes GPU blur artefacts
   when the canvas behind it repaints). JS swaps text content in place. */
.scroll-text-card {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 440px;
    max-width: 90%;
    height: 240px;
    overflow: hidden;
    background: #0e0e12;
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2.5rem 2.5rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}
.scroll-card-step {
    font-family: var(--serif);
    font-size: 3.5rem;
    color: var(--accent);
    opacity: 0.2;
    line-height: 1;
    margin-bottom: 0.5rem;
}
.scroll-text-card h3 {
    font-family: var(--serif) !important;
    font-size: 1.6rem !important;
    letter-spacing: -0.01em !important;
    margin-bottom: 0.75rem !important;
    color: var(--text) !important;
    font-weight: 400 !important;
}
.scroll-text-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.65;
    font-weight: 300;
    margin: 0;
}
.scroll-progress-bar {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 2px;
    background: var(--border);
    border-radius: 10px;
    z-index: 10;
    overflow: hidden;
}
#scroll-progress {
    height: 100%;
    width: 0%;
    background: var(--accent);
    border-radius: 10px;
    transition: width 0.1s linear;
}

/* Features section */
.home-features-section {
    padding: 7rem 2rem;
    background: var(--bg);
}
.home-section-header {
    text-align: center;
    margin-bottom: 4rem;
}
.home-section-header h2 {
    font-family: var(--serif) !important;
    font-size: clamp(2rem, 4vw, 3rem) !important;
    letter-spacing: -0.02em !important;
    margin-bottom: 0.5rem !important;
    color: var(--text) !important;
    font-weight: 400 !important;
}
.home-section-header p {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 300;
    margin: 0;
}
.home-features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    max-width: 1100px;
    margin: 0 auto;
}
@media (max-width: 900px) {
    .home-features-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 500px) {
    .home-features-grid { grid-template-columns: 1fr; }
}
.home-feature-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 2.5rem 2rem;
    transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
    opacity: 0;
    transform: translateY(40px);
}
.home-feature-card.visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s ease-out, transform 0.7s ease-out, border-color 0.3s, box-shadow 0.3s;
}
.home-feature-card:hover {
    border-color: rgba(108,156,255,0.2);
    transform: translateY(-4px);
}
.home-feature-icon {
    width: 44px; height: 44px;
    border-radius: 10px;
    background: var(--accent-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
}
.home-feature-card h3 {
    font-size: 1.05rem !important;
    margin-bottom: 0.75rem !important;
    font-weight: 500 !important;
    color: var(--text) !important;
}
.home-feature-card p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.6;
    font-weight: 300;
    margin: 0;
}

/* How It Works */
.home-workflow-section {
    padding: 7rem 2rem;
    background: var(--bg);
}
.home-workflow-steps {
    margin-top: 4rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
}
.home-step-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    padding: 3rem;
    border-radius: 16px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}
.home-step-card.visible { opacity: 1; transform: translateY(0); }
.home-step-card:nth-child(even) .step-text { order: 2; }
.home-step-card:nth-child(even) .step-visual { order: 1; }
@media (max-width: 768px) {
    .home-step-card {
        grid-template-columns: 1fr;
        padding: 2rem;
        gap: 2rem;
    }
    .home-step-card:nth-child(even) .step-text { order: 1; }
    .home-step-card:nth-child(even) .step-visual { order: 2; }
}
.step-number {
    font-family: var(--serif);
    font-size: 3.5rem;
    color: var(--accent);
    opacity: 0.2;
    line-height: 1;
    margin-bottom: 1rem;
}
.step-text h3 {
    font-family: var(--serif) !important;
    font-size: 1.6rem !important;
    letter-spacing: -0.01em !important;
    margin-bottom: 0.75rem !important;
    color: var(--text) !important;
    font-weight: 400 !important;
}
.step-text p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.65;
    font-weight: 300;
    margin: 0;
}
.step-visual {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.5rem;
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    font-size: 0.78rem;
    line-height: 1.8;
    color: var(--text-secondary);
    min-height: 180px;
    overflow: hidden;
}
.sv-prompt  { color: var(--accent); }
.sv-code    { color: var(--accent-secondary); }
.sv-output  { color: var(--green); }
.sv-comment { color: var(--text-dim); font-style: italic; }

/* Email signup */
.home-signup-section {
    padding: 6rem 2rem;
    text-align: center;
    border-top: 1px solid var(--border);
    background: var(--bg);
}
.home-signup-section h2 {
    font-family: var(--serif) !important;
    font-size: clamp(1.8rem, 3vw, 2.5rem) !important;
    letter-spacing: -0.02em !important;
    color: var(--text) !important;
    font-weight: 400 !important;
    margin-bottom: 0.5rem !important;
}
.signup-form-row {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
    max-width: 460px;
    margin: 2rem auto 0;
}
.signup-note {
    color: var(--text-dim);
    font-size: 0.75rem;
    margin-top: 1rem;
}

/* Final CTA */
.home-final-cta {
    padding: 8rem 2rem;
    text-align: center;
    position: relative;
    background: var(--bg);
}
.home-final-cta::before {
    content: '';
    position: absolute;
    bottom: 0; left: 50%;
    transform: translateX(-50%);
    width: 600px; height: 600px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    pointer-events: none;
    opacity: 0.3;
}
.home-final-cta h2 {
    font-family: var(--serif) !important;
    font-size: clamp(2.5rem, 5vw, 4rem) !important;
    letter-spacing: -0.03em !important;
    line-height: 1.1 !important;
    max-width: 600px;
    margin: 0 auto 1rem !important;
    position: relative;
    z-index: 1;
    color: var(--text) !important;
    font-weight: 400 !important;
}
.home-final-cta p {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 300;
    position: relative;
    z-index: 1;
    margin-bottom: 2.5rem;
}

/* Home footer */
.home-footer {
    padding: 3.5rem 3rem;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 2rem;
    background: var(--bg);
}
.footer-brand-name {
    font-family: var(--serif);
    font-size: 1.2rem;
    color: var(--text);
}
.footer-nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
    margin: 0; padding: 0;
}
.footer-nav-links a {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.8rem;
    transition: color 0.2s;
}
.footer-nav-links a:hover { color: var(--text-secondary); }
.footer-copy {
    color: var(--text-dim);
    font-size: 0.75rem;
}

/* About page typography polish */
.about-h1 {
    font-family: var(--serif) !important;
    font-size: clamp(2rem, 4vw, 3rem) !important;
    font-weight: 400 !important;
    letter-spacing: -0.02em !important;
    color: var(--text) !important;
}
.about-section-label {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 0.75rem;
}

/* ==========================================================================
   Portal Page — Datably Redesign
   ========================================================================== */

/* ── Portal Welcome Header ── */
.welcome-header {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    background-color: transparent;
    border-radius: var(--radius-xl);
    margin-bottom: 1.5rem;
}

.welcome-header h2 {
    font-family: var(--serif) !important;
    font-weight: 400 !important;
    letter-spacing: -0.02em !important;
    color: var(--text) !important;
    font-size: 2.2rem !important;
    line-height: 1.2 !important;
    margin-bottom: 0.5rem !important;
}

.welcome-header h2 em {
    font-style: italic;
    color: var(--accent);
    font-family: var(--serif);
}

.welcome-header .welcome-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 300;
    margin: 0;
}

/* ── Ambient Glow behind Input (initial state) ── */
#centered-chat-content.centered {
    position: relative;
}

#centered-chat-content.centered::before {
    content: '';
    position: absolute;
    top: -60px;
    left: 50%;
    transform: translateX(-50%);
    width: 500px;
    height: 400px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    pointer-events: none;
    opacity: 0.4;
    animation: ambientPulse 6s ease-in-out infinite alternate;
    z-index: -1;
}

@keyframes ambientPulse {
    0%   { opacity: 0.3; transform: translateX(-50%) scale(1); }
    100% { opacity: 0.5; transform: translateX(-50%) scale(1.1); }
}

/* Remove glow when no longer centered */
#centered-chat-content:not(.centered)::before {
    display: none;
}

/* ── Suggestion Cards (2x2 grid in initial state) ── */
.portal-suggestions-wrapper {
    width: 100%;
    max-width: 680px;
    margin: 0 auto;
    transition: opacity 0.3s ease, max-height 0.3s ease;
}

/* Hide suggestions when chat transitions from centered */
#centered-chat-content:not(.centered) .portal-suggestions-wrapper {
    display: none;
}

.portal-suggestions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    width: 100%;
    margin-bottom: 1rem;
}

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

.portal-suggestion-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1rem 1.25rem;
    cursor: pointer;
    transition: border-color 0.2s, transform 0.2s, background 0.2s;
    text-decoration: none !important;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    color: var(--text) !important;
}

.portal-suggestion-card:hover {
    border-color: rgba(108,156,255,0.2);
    background: var(--bg-card);
    transform: translateY(-2px);
}

.portal-suggestion-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: var(--accent-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.portal-suggestion-text h4 {
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 2px;
}

.portal-suggestion-text p {
    font-size: 0.78rem;
    color: var(--text-dim);
    font-weight: 300;
    line-height: 1.4;
    margin: 0;
}

/* ── Dataset Stats Bar ── */
.portal-dataset-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    padding-top: 0.25rem;
}

.portal-dataset-stat {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.75rem;
    color: var(--text-dim);
}

.portal-dataset-stat .num {
    color: var(--text-secondary);
    font-weight: 500;
}

/* ── Chat Panel Header (results state) ── */
.portal-chat-header {
    padding: 0.85rem 1.25rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.78rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 500;
    background: var(--bg-elevated);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    flex-shrink: 0;
}

.portal-chat-header .header-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--green);
    animation: pulse 2s infinite;
}

/* Show chat header only when history is visible (messages flowing) */
.portal-chat-header {
    opacity: 0;
    max-height: 0;
    padding: 0;
    overflow: hidden;
    transition: opacity 0.3s ease, max-height 0.3s ease, padding 0.3s ease;
}

.portal-chat-header.visible {
    opacity: 1;
    max-height: 50px;
    padding: 0.85rem 1.25rem;
}

/* ── AI Message Label ── */
.ai-message-label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.72rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 500;
    margin-bottom: 0.4rem;
}

.ai-message-label .ai-label-dot {
    width: 16px;
    height: 16px;
    border-radius: 4px;
    background: var(--accent-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.55rem;
    color: var(--accent);
    font-weight: 600;
}

/* ── AI message bubble — updated for portal redesign ── */
.ai-message .message-content {
    background-color: var(--bg);
    border: 1px solid var(--border);
    color: var(--ai-bubble-text);
    border-bottom-left-radius: 4px;
}

/* ── User message bubble refinement ── */
.user-message .message-content {
    background-color: var(--surface);
    color: var(--user-bubble-text);
    border-bottom-right-radius: 4px;
}

/* ── Viz Panel Header with Tabs ── */
.portal-viz-header {
    padding: 0.85rem 1.25rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg);
    flex-shrink: 0;
}

.portal-viz-tabs {
    display: flex;
    gap: 0;
    background: var(--surface);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.portal-viz-tab {
    padding: 0.45rem 1rem;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-dim);
    cursor: pointer;
    transition: all 0.2s;
    border-right: 1px solid var(--border);
    background: transparent;
    border-top: none;
    border-bottom: none;
    border-left: none;
    font-family: var(--sans);
}

.portal-viz-tab:last-child { border-right: none; }

.portal-viz-tab.active {
    background: var(--accent);
    color: #0A0A0C;
}

.portal-viz-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.75rem;
    color: var(--text-dim);
}

.portal-viz-meta a {
    color: var(--accent);
    text-decoration: none;
    font-size: 0.75rem;
    transition: opacity 0.2s;
}

.portal-viz-meta a:hover { opacity: 0.8; }

/* (progress indicator styles consolidated above) */

/* ── Chat Input — Updated styling for portal redesign ── */
.chat-input-textarea {
    width: 100%;
    padding-right: 3.5rem !important;
    border-radius: 16px !important;
    font-size: 1rem;
    background: var(--bg-elevated) !important;
    color: var(--text) !important;
    border: 1px solid var(--border) !important;
    min-height: 100px;
    box-shadow: none !important;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.chat-input-textarea:focus-within {
    border-color: rgba(108,156,255,0.3) !important;
    box-shadow: 0 0 0 4px rgba(108,156,255,0.06), 0 8px 30px rgba(0,0,0,0.3) !important;
}

.chat-input-textarea textarea {
    min-height: 100px !important;
    font-weight: 300 !important;
}

.chat-input-arrow-btn {
    position: absolute;
    right: 1rem;
    bottom: 1rem;
    width: 36px;
    height: 36px;
    background: var(--accent);
    color: #0A0A0C;
    border: none;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: none;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    z-index: 2;
    font-size: 1.1rem;
    outline: none;
}

.chat-input-arrow-btn:hover,
.chat-input-arrow-btn:focus {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px var(--accent-glow);
    background: var(--accent);
}

/* ── Figure selector styled as segmented tabs ── */
#figure-selector-container {
    padding: 0.85rem 1.25rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg);
}

#figure-selector-container .mantine-SegmentedControl-root {
    background: var(--surface) !important;
    border: 1px solid var(--border) !important;
    border-radius: 8px !important;
}

#figure-selector-container .mantine-SegmentedControl-label {
    font-size: 0.78rem !important;
    font-weight: 500 !important;
    color: var(--text-dim) !important;
    padding: 0.4rem 1rem !important;
}

#figure-selector-container .mantine-SegmentedControl-indicator {
    background: var(--accent) !important;
    border-radius: 6px !important;
}

#figure-selector-container .mantine-SegmentedControl-label[data-active] {
    color: #0A0A0C !important;
}

/* Mantine input updates for new palette */
.mantine-TextInput-input {
    background: var(--bg-elevated) !important;
    border: 1px solid var(--border) !important;
    color: var(--text) !important;
    border-radius: 16px !important;
}
.mantine-TextInput-input:focus {
    border-color: rgba(108,156,255,0.3) !important;
    outline: none !important;
    box-shadow: 0 0 0 4px rgba(108,156,255,0.06) !important;
}
.mantine-TextInput-input::placeholder,
.mantine-Textarea-input::placeholder {
    color: var(--text-dim) !important;
}
/* Textarea inner input: no border (outer .chat-input-textarea handles it) */
.mantine-Textarea-input {
    background: transparent !important;
    border: none !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    outline: none !important;
}
.mantine-Textarea-input:focus {
    border: none !important;
    box-shadow: none !important;
    outline: none !important;
}

/* ==========================================================================
   Portal Layout — Desktop defaults (moved from inline styles)
   ========================================================================== */
.portal-main-row {
    height: 85vh;
}

.portal-chat-col {
    height: 85vh;
}

.portal-viz-col {
    min-width: 0px;
    height: 85vh;
}

/* ==========================================================================
   Mobile Responsive — Tablet (≤ 768px)
   ========================================================================== */
@media (max-width: 768px) {

    /* ── Navbar: hamburger menu ── */
    .nav-hamburger {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .nav-links-list {
        position: fixed;
        top: var(--navbar-height);
        left: 0;
        right: 0;
        background: rgba(10, 10, 12, 0.95);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: center;
        gap: 0;
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease, padding 0.35s ease;
        border-bottom: 1px solid transparent;
        z-index: var(--z-navbar);
    }

    .datably-navbar.nav-open .nav-links-list {
        max-height: 320px;
        padding: 1rem 0;
        border-bottom-color: var(--border);
    }

    .nav-links-list li {
        width: 100%;
        text-align: center;
    }

    .nav-link-item {
        display: block;
        padding: 0.85rem 1.5rem;
        font-size: 1rem;
    }

    .nav-cta {
        margin: 0.5rem 1.5rem;
        display: block !important;
        text-align: center;
    }

    /* ── Content area ── */
    .content {
        padding: var(--spacing-md);
    }

    /* ── Portal page: stack columns vertically ── */
    .portal-main-row {
        height: auto !important;
        flex-direction: column !important;
    }

    .portal-main-row > [class*="col"] {
        flex: 0 0 100% !important;
        max-width: 100% !important;
        margin-left: 0 !important;
    }

    .portal-chat-col {
        height: auto !important;
        min-height: 60vh !important;
    }

    .portal-viz-col {
        height: auto !important;
        min-height: 50vh !important;
    }

    /* Portal container padding */
    .main-container.full-height {
        padding: var(--spacing-md) !important;
    }

    /* Chat history */
    .chat-history {
        height: 50vh;
    }

    /* Chat input box */
    .chat-input-textarea,
    .chat-input-textarea textarea {
        min-height: 70px !important;
    }

    /* Welcome header */
    .welcome-header h2 {
        font-size: 1.6rem !important;
    }

    /* Centered chat content */
    #centered-chat-content.centered {
        width: 100%;
        max-width: 100%;
        padding: 0 var(--spacing-sm);
    }

    /* Suggestion cards already go 1-col at 600px */

    /* Map height */
    .leaflet-container {
        height: 50vh;
    }

    #right-content-container .map-container {
        min-height: 300px;
    }

    /* Progress terminal */
    .progress-terminal {
        max-width: 100%;
    }

    /* Message bubbles — wider on mobile */
    .message-container {
        max-width: 95%;
    }

    /* Touch-friendly tap targets (44px minimum) */
    .chat-input-arrow-btn {
        width: 44px;
        height: 44px;
        font-size: 1.3rem;
    }

    .portal-suggestion-card {
        padding: 1rem;
        min-height: 44px;
    }

    .nav-link-item {
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    /* Home page wrapper margin compensation */
    .home-page-wrapper {
        margin: calc(-1 * var(--spacing-md));
        margin-bottom: 0;
    }

    /* Home page hero adjustments */
    .home-hero {
        padding: 4rem 1.25rem 3rem;
        min-height: calc(80vh - var(--navbar-height));
    }

    .hero-badge {
        margin-bottom: 1.5rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
        gap: 0.75rem;
    }

    .hero-btn-primary,
    .hero-btn-secondary {
        width: 100%;
        max-width: 280px;
        text-align: center;
    }

    .hero-scroll-hint {
        display: none;
    }

    /* Home sections */
    .home-demo-section,
    .home-features-section,
    .home-workflow-section,
    .home-signup-section,
    .home-final-cta {
        padding: 3.5rem 1.25rem;
    }

    .home-section-header {
        margin-bottom: 2.5rem;
    }

    /* Scroll showcase */
    .home-scroll-showcase {
        min-height: 200vh;
    }

    .scroll-text-card {
        width: 320px;
        height: auto;
        min-height: 200px;
        padding: 2rem 1.5rem;
    }

    .scroll-card-step {
        font-size: 2.5rem;
    }

    .scroll-text-card h3 {
        font-size: 1.3rem !important;
    }

    /* Step cards */
    .home-step-card {
        padding: 1.5rem;
    }

    .step-visual {
        font-size: 0.72rem;
        min-height: 140px;
        padding: 1rem;
    }

    /* Footer */
    .home-footer {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 2.5rem 1.5rem;
        gap: 1.5rem;
    }

    .footer-nav-links {
        gap: 1.5rem;
    }

    /* About page */
    .about-h1 {
        font-size: clamp(1.6rem, 5vw, 2.5rem) !important;
    }

    /* Ambient glow — smaller on mobile */
    #centered-chat-content.centered::before {
        width: 300px;
        height: 250px;
    }

    /* Viz panel content */
    #right-content-container .mantine-Stack-root,
    .mantine-Stack-root[style*="100vh"] {
        height: auto !important;
        max-height: 80vh;
    }
}

/* ==========================================================================
   Mobile Responsive — Phone (≤ 480px)
   ========================================================================== */
@media (max-width: 480px) {

    /* Tighter spacing */
    .content {
        padding: var(--spacing-sm);
    }

    .main-container.full-height {
        padding: var(--spacing-sm) !important;
    }

    /* Home page wrapper */
    .home-page-wrapper {
        margin: calc(-1 * var(--spacing-sm));
        margin-bottom: 0;
    }

    /* Typography */
    .welcome-header h2 {
        font-size: 1.35rem !important;
    }

    .welcome-header .welcome-subtitle {
        font-size: 0.85rem;
    }

    /* Chat */
    .chat-history {
        height: 45vh;
        padding: var(--spacing-sm);
        gap: 12px;
    }

    .chat-input-textarea,
    .chat-input-textarea textarea {
        min-height: 60px !important;
        font-size: 0.95rem;
    }

    .message-content {
        padding: 10px 14px;
        font-size: 0.9rem;
    }

    /* Portal suggestions */
    .portal-suggestion-text h4 {
        font-size: 0.82rem;
    }

    .portal-suggestion-text p {
        font-size: 0.72rem;
    }

    .portal-dataset-bar {
        gap: 0.75rem;
        flex-wrap: wrap;
        justify-content: center;
    }

    .portal-dataset-stat {
        font-size: 0.7rem;
    }

    /* Map */
    .leaflet-container {
        height: 40vh;
    }

    #right-content-container .map-container {
        min-height: 250px;
    }

    /* Home hero */
    .home-hero {
        padding: 3rem 1rem 2rem;
    }

    .hero-badge {
        font-size: 0.7rem;
        padding: 0.3rem 0.9rem 0.3rem 0.5rem;
    }

    /* Demo pills */
    .demo-pill {
        padding: 0.6rem 1.2rem;
        font-size: 0.8rem;
    }

    /* Feature cards */
    .home-feature-card {
        padding: 1.5rem 1.25rem;
    }

    /* Final CTA */
    .home-final-cta {
        padding: 5rem 1.25rem;
    }

    /* Footer */
    .home-footer {
        padding: 2rem 1rem;
    }

    .footer-nav-links {
        flex-direction: column;
        gap: 1rem;
        align-items: center;
    }

    /* Figure selector */
    #figure-selector-container {
        padding: 0.5rem 0.75rem;
    }

    #figure-selector-container .mantine-SegmentedControl-label {
        font-size: 0.7rem !important;
        padding: 0.35rem 0.6rem !important;
    }

    /* Chat header */
    .portal-chat-header.visible {
        padding: 0.65rem 0.85rem;
        font-size: 0.7rem;
    }

    /* New conversation button */
    #new-conversation-container .mantine-Button-root {
        font-size: 0.75rem;
    }
}