/* ==========================================================================
   Ali Global Vision (AGV) — Background Removal SaaS Web Application
   Brand Palette: Crimson Red (#D80100), Dark (#292830), Light (#F7F7F7), White (#FFFFFF)
   Fully Responsive (Mobile, Tablet, Desktop)
   ========================================================================== */

:root {
    --agv-red: #D80100;
    --agv-red-hover: #b80100;
    --agv-red-subtle: rgba(216, 1, 0, 0.08);
    --agv-red-glow: rgba(216, 1, 0, 0.28);

    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light / White Theme (Default) */
:root, [data-theme="light"] {
    --header-bg: #FFFFFF;
    --footer-bg: #FFFFFF; /* EXACT MATCH to header */
    --body-bg: #F8FAFC;
    --card-bg: #FFFFFF;
    --card-bg-subtle: #F1F5F9;
    --card-border: #E2E8F0;
    --card-border-subtle: #F1F5F9;

    --text-primary: #1E293B;
    --text-secondary: #475569;
    --text-muted: #64748B;
    --agv-dark: #1E293B;
    --agv-dark-muted: #475569;
    --agv-gray: #64748B;
    --agv-gray-light: #94A3B8;
    --agv-border: #E2E8F0;
    --agv-border-light: #F1F5F9;
    --agv-bg-light: #F8FAFC;
    --agv-white: #FFFFFF;

    --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 10px 24px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 18px 45px rgba(0, 0, 0, 0.08);
    --shadow-red: 0 8px 24px var(--agv-red-glow);

    --nav-pill-bg: #F1F5F9;
    --nav-pill-text: #475569;
    --nav-pill-active-bg: rgba(216, 1, 0, 0.08);
    --nav-pill-active-text: #D80100;
    --nav-divider: #E2E8F0;

    --theme-btn-bg: #F1F5F9;
    --theme-btn-text: #64748B;
    --theme-btn-active-bg: #FFFFFF;
    --theme-btn-active-text: #D80100;
    --theme-btn-border: #CBD5E1;

    --footer-text: #334155;
    --footer-muted: #64748B;
    --footer-heading: #0F172A;
    --footer-border: #E2E8F0;
}

/* Dark Theme (Pure Dark Black per user request: 'only dark black') */
[data-theme="dark"] {
    --header-bg: #0A0A0A;
    --footer-bg: #0A0A0A; /* EXACT MATCH to header */
    --body-bg: #000000;   /* Pure dark black */
    --card-bg: #111111;
    --card-bg-subtle: #171717;
    --card-border: #262626;
    --card-border-subtle: #1F1F1F;

    --text-primary: #F8FAFC;
    --text-secondary: #CBD5E1;
    --text-muted: #94A3B8;
    --agv-dark: #F8FAFC;
    --agv-dark-muted: #CBD5E1;
    --agv-gray: #94A3B8;
    --agv-gray-light: #64748B;
    --agv-border: #262626;
    --agv-border-light: #1F1F1F;
    --agv-bg-light: #0D0D0D;
    --agv-white: #111111;

    --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 10px 24px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 18px 45px rgba(0, 0, 0, 0.8);
    --shadow-red: 0 8px 24px rgba(216, 1, 0, 0.4);

    --nav-pill-bg: #181818;
    --nav-pill-text: #CBD5E1;
    --nav-pill-active-bg: rgba(216, 1, 0, 0.22);
    --nav-pill-active-text: #FF4D4D;
    --nav-divider: #222222;

    --theme-btn-bg: #141414;
    --theme-btn-text: #94A3B8;
    --theme-btn-active-bg: #222222;
    --theme-btn-active-text: #FFFFFF;
    --theme-btn-border: #2E2E2E;

    --footer-text: #CBD5E1;
    --footer-muted: #94A3B8;
    --footer-heading: #FFFFFF;
    --footer-border: #222222;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-main);
    background-color: var(--body-bg);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    transition: background-color var(--transition), color var(--transition);
}

.container {
    width: 100%;
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ==========================================================================
   Sticky Header & Navigation
   ========================================================================== */

.agv-header {
    background-color: var(--header-bg);
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: background-color var(--transition), border-color var(--transition);
}

.header-container {
    display: flex;
    flex-direction: column;
}

.header-main-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 16px;
}

.agv-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-badge {
    background: linear-gradient(135deg, var(--agv-red) 0%, #9e0100 100%);
    color: #ffffff;
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.15rem;
    letter-spacing: -0.5px;
    box-shadow: var(--shadow-red);
}

.brand-logo-img {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    object-fit: contain;
    box-shadow: 0 4px 14px rgba(216, 1, 0, 0.25);
    transition: transform var(--transition);
}

.brand-logo-img:hover {
    transform: scale(1.05);
}

.brand-header-logo {
    height: 38px;
    width: auto;
    max-width: 190px;
    object-fit: contain;
    display: block;
    transition: transform var(--transition);
}

.brand-header-logo:hover {
    transform: scale(1.02);
}

.brand-footer-logo {
    height: 52px;
    width: auto;
    max-width: 250px;
    object-fit: contain;
    display: block;
    margin-bottom: 16px;
    transition: transform var(--transition);
}

.brand-footer-logo:hover {
    transform: scale(1.03);
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.2;
}

.brand-unit {
    font-size: 0.74rem;
    font-weight: 700;
    color: var(--agv-red);
    text-transform: uppercase;
    letter-spacing: 0.7px;
}

/* 3-State Theme Customizer: Device, Dark, White */
.theme-switcher-box {
    display: inline-flex;
    align-items: center;
    background: var(--theme-btn-bg);
    padding: 3px;
    border-radius: 999px;
    border: 1px solid var(--theme-btn-border);
    gap: 2px;
    flex-shrink: 0;
    transition: background-color var(--transition), border-color var(--transition);
}

.theme-opt-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 12px;
    border-radius: 999px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--theme-btn-text);
    font-family: var(--font-main);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    user-select: none;
    white-space: nowrap;
}

.theme-opt-btn:hover {
    color: var(--text-primary);
}

.theme-opt-btn.active {
    background: var(--theme-btn-active-bg);
    color: var(--theme-btn-active-text);
    border-color: var(--theme-btn-border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.theme-icon {
    font-size: 0.95rem;
    line-height: 1;
}

.theme-txt {
    font-size: 0.8rem;
}

/* Organized Navigation Bar (Always Visible On All Devices, Never Hides!) */
.agv-nav-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    overflow-x: auto;
    white-space: nowrap;
    padding: 6px 0 10px;
    border-top: 1px solid var(--nav-divider);
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    transition: border-color var(--transition);
}

.agv-nav-bar::-webkit-scrollbar {
    display: none;
}

.nav-pill {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 0.84rem;
    font-weight: 600;
    color: var(--nav-pill-text);
    background: var(--nav-pill-bg);
    border: 1px solid transparent;
    transition: all var(--transition);
    flex-shrink: 0;
    text-decoration: none;
}

.nav-pill:hover {
    color: var(--agv-red);
    border-color: rgba(216, 1, 0, 0.25);
    background: var(--nav-pill-active-bg);
    transform: translateY(-1px);
}

.nav-pill.active {
    color: var(--nav-pill-active-text);
    background: var(--nav-pill-active-bg);
    border-color: rgba(216, 1, 0, 0.35);
}

.nav-pill-cta {
    background: var(--agv-red);
    color: #ffffff !important;
    border-color: var(--agv-red);
    box-shadow: 0 2px 8px var(--agv-red-glow);
    margin-left: auto;
}

.nav-pill-cta:hover {
    background: var(--agv-red-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(216, 1, 0, 0.4);
}

/* ==========================================================================
   Buttons & Badges
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-main);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 12px 22px;
    border-radius: var(--radius-md);
    cursor: pointer;
    border: 1px solid transparent;
    transition: all var(--transition);
    white-space: nowrap;
    user-select: none;
}

.btn-primary {
    background-color: var(--agv-red);
    color: var(--agv-white);
    box-shadow: var(--shadow-red);
}

.btn-primary:hover {
    background-color: var(--agv-red-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(216, 1, 0, 0.4);
}

.btn-secondary {
    background-color: var(--agv-white);
    color: var(--agv-dark);
    border: 1px solid var(--agv-border);
}

.btn-secondary:hover {
    background-color: #f8fafc;
    border-color: #cbd5e1;
    transform: translateY(-1px);
}

.btn-large {
    padding: 15px 32px;
    font-size: 1.05rem;
    border-radius: var(--radius-md);
}

.badge-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background-color: var(--agv-red-subtle);
    color: var(--agv-red);
    font-size: 0.82rem;
    font-weight: 700;
    padding: 6px 16px;
    border-radius: 999px;
    margin-bottom: 16px;
    letter-spacing: 0.4px;
    text-transform: uppercase;
    border: 1px solid rgba(216, 1, 0, 0.15);
}

.text-highlight {
    color: var(--agv-red);
    position: relative;
    display: inline-block;
}

/* ==========================================================================
   Hero & Interactive Tool
   ========================================================================== */

.hero-section {
    padding: 45px 0 55px;
    text-align: center;
}

.hero-header {
    max-width: 820px;
    margin: 0 auto 34px;
}

.hero-title {
    font-size: 2.85rem;
    font-weight: 800;
    line-height: 1.18;
    color: var(--agv-dark);
    margin-bottom: 14px;
    letter-spacing: -0.6px;
}

.hero-description {
    font-size: 1.15rem;
    color: var(--agv-gray);
    max-width: 680px;
    margin: 0 auto;
}

/* Breadcrumbs */
.agv-breadcrumbs {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--agv-gray);
    margin-bottom: 16px;
}

.agv-breadcrumbs a {
    color: var(--agv-dark-muted);
}

.agv-breadcrumbs a:hover {
    color: var(--agv-red);
}

.agv-breadcrumbs span.sep {
    color: var(--agv-gray-light);
}

.agv-breadcrumbs span.current {
    color: var(--agv-red);
    font-weight: 600;
}

/* Centerpiece Application Card */
.agv-tool-card {
    background-color: var(--agv-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--agv-border);
    max-width: 880px;
    margin: 0 auto;
    overflow: hidden;
    transition: box-shadow var(--transition);
}

/* 1. Upload Zone */
.upload-zone {
    padding: 55px 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 2px dashed #cbd5e1;
    border-radius: calc(var(--radius-xl) - 6px);
    margin: 18px;
    background-color: #fafbfc;
    cursor: pointer;
    transition: all var(--transition);
}

.upload-zone:hover {
    border-color: var(--agv-red);
    background-color: #fdfafa;
}

.upload-zone.dragover {
    border-color: var(--agv-red);
    background-color: var(--agv-red-subtle);
    transform: scale(1.01);
}

.upload-icon-circle {
    width: 84px;
    height: 84px;
    border-radius: 50%;
    background-color: var(--agv-red-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--agv-red);
    transition: transform var(--transition);
}

.upload-zone:hover .upload-icon-circle {
    transform: translateY(-4px) scale(1.05);
}

.upload-heading {
    font-size: 1.45rem;
    font-weight: 700;
    color: var(--agv-dark);
    margin-bottom: 6px;
}

.upload-subtext {
    font-size: 0.95rem;
    color: var(--agv-gray);
    margin-bottom: 24px;
}

.upload-trigger-btn {
    margin-bottom: 20px;
}

.format-badges {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.8rem;
    color: var(--agv-gray);
}

.format-badges span:not(.max-size-label) {
    background-color: #e2e8f0;
    color: #475569;
    padding: 3px 9px;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.sample-test-wrapper {
    margin-top: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

.sample-label {
    font-size: 0.88rem;
    color: var(--agv-gray);
    font-weight: 500;
}

.sample-chips {
    display: flex;
    gap: 8px;
}

.sample-chip {
    background-color: var(--agv-white);
    border: 1px solid var(--agv-border);
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--agv-dark);
    cursor: pointer;
    transition: all var(--transition);
}

.sample-chip:hover {
    border-color: var(--agv-red);
    color: var(--agv-red);
    background-color: var(--agv-red-subtle);
}

.upload-error-msg {
    margin-top: 16px;
    background-color: #fef2f2;
    color: #b91c1c;
    border: 1px solid #fecaca;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
}

/* 2. Processing Zone */
.processing-zone {
    padding: 75px 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.spinner-wrapper {
    margin-bottom: 24px;
}

.agv-spinner {
    width: 62px;
    height: 62px;
    border: 5px solid rgba(216, 1, 0, 0.15);
    border-top-color: var(--agv-red);
    border-radius: 50%;
    animation: agvSpin 0.85s linear infinite;
}

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

.processing-title {
    font-size: 1.55rem;
    font-weight: 700;
    color: var(--agv-dark);
    margin-bottom: 8px;
}

.processing-sub {
    font-size: 0.96rem;
    color: var(--agv-gray);
    margin-bottom: 28px;
}

.progress-bar-container {
    width: 100%;
    max-width: 440px;
    height: 8px;
    background-color: #e2e8f0;
    border-radius: 999px;
    overflow: hidden;
    margin-bottom: 24px;
}

.progress-bar-fill {
    width: 25%;
    height: 100%;
    background: linear-gradient(90deg, var(--agv-red) 0%, #ff4d4d 100%);
    border-radius: 999px;
    transition: width 0.4s ease;
}

.processing-steps {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

.step-badge {
    font-size: 0.8rem;
    font-weight: 600;
    padding: 5px 14px;
    border-radius: 999px;
    background-color: #f1f5f9;
    color: #64748b;
    transition: all var(--transition);
}

.step-badge.active {
    background-color: var(--agv-red);
    color: var(--agv-white);
}

.step-badge.done {
    background-color: var(--agv-success-bg);
    color: var(--agv-success);
}

/* 3. Result Zone */
.result-zone {
    padding: 28px;
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 16px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--agv-border);
}

.result-title-group {
    text-align: left;
}

.result-heading {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--agv-dark);
}

.result-badge {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--agv-success);
    background-color: var(--agv-success-bg);
    padding: 3px 12px;
    border-radius: 999px;
    display: inline-block;
    margin-top: 4px;
}

.view-controls {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
}

.view-toggle-group {
    display: flex;
    background-color: #f1f5f9;
    padding: 4px;
    border-radius: var(--radius-md);
    border: 1px solid var(--agv-border);
}

.toggle-btn {
    border: none;
    background: transparent;
    padding: 7px 16px;
    font-family: var(--font-main);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--agv-dark-muted);
    border-radius: calc(var(--radius-md) - 2px);
    cursor: pointer;
    transition: all var(--transition);
}

.toggle-btn.active {
    background-color: var(--agv-white);
    color: var(--agv-dark);
    box-shadow: var(--shadow-sm);
}

/* AI Smart Color Recommendation Bar */
.ai-recommendation-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 18px;
    margin-bottom: 18px;
    background: linear-gradient(135deg, #eff6ff 0%, #f0fdf4 100%);
    border: 1px solid #bfdbfe;
    border-radius: var(--radius-md);
    flex-wrap: wrap;
    animation: fadeIn 0.3s ease;
}

.ai-rec-left {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--agv-dark);
}

.ai-rec-sparkle {
    color: #2563eb;
}

.ai-rec-text {
    color: var(--agv-dark-muted);
}

.btn-ai-apply {
    background: #2563eb;
    color: #ffffff;
    border: none;
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    font-weight: 700;
    cursor: pointer;
    transition: background var(--transition), transform var(--transition);
}

.btn-ai-apply:hover {
    background: #1d4ed8;
    transform: translateY(-1px);
}

/* Multi-Option Background Studio */
.bg-studio-panel {
    background: #f8fafc;
    border: 1px solid var(--agv-border);
    border-radius: var(--radius-md);
    padding: 14px 18px;
    margin-bottom: 22px;
}

.studio-tab-bar {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 10px;
    margin-bottom: 12px;
    border-bottom: 1px solid var(--agv-border);
    scrollbar-width: thin;
    -webkit-overflow-scrolling: touch;
}

.studio-tab {
    border: 1px solid transparent;
    background: transparent;
    padding: 7px 14px;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--agv-dark-muted);
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition);
}

.studio-tab:hover {
    background: #f1f5f9;
    color: var(--agv-dark);
}

.studio-tab.active {
    background: var(--agv-white);
    color: var(--agv-red);
    border-color: #cbd5e1;
    box-shadow: var(--shadow-sm);
}

.studio-tab-content {
    animation: fadeIn 0.25s ease;
}

.tab-note {
    font-size: 0.85rem;
    color: var(--agv-dark-muted);
    margin: 4px 0;
}

/* Swatches Grid */
.bg-swatches-grid {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    padding: 6px 0;
}

.color-swatch-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: transform var(--transition);
}

.color-swatch-item:hover, .color-swatch-item.active {
    transform: translateY(-2px);
}

.swatch-circle {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid #cbd5e1;
    display: block;
    box-shadow: inset 0 0 0 1px rgba(0,0,0,0.06);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.color-swatch-item.active .swatch-circle {
    border-color: var(--agv-red);
    box-shadow: 0 0 0 2px rgba(216, 1, 0, 0.25);
}

.swatch-label {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--agv-dark-muted);
}

.custom-color-picker-wrap {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    cursor: pointer;
}

.custom-color-picker-wrap input[type="color"] {
    position: absolute;
    opacity: 0;
    width: 32px;
    height: 32px;
    cursor: pointer;
}

.custom-color-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--agv-dark-muted);
    cursor: pointer;
}

.picker-rainbow-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: conic-gradient(red, yellow, lime, aqua, blue, magenta, red);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid #cbd5e1;
    font-size: 13px;
}

/* Preset Stock Scenes */
.scenes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
    gap: 12px;
    padding: 6px 0;
}

.scene-card {
    background: var(--agv-white);
    border: 1px solid var(--agv-border);
    border-radius: var(--radius-md);
    padding: 6px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    transition: all var(--transition);
}

.scene-card:hover, .scene-card.active {
    border-color: var(--agv-red);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.scene-preview {
    width: 100%;
    height: 60px;
    border-radius: var(--radius-sm);
    background-size: cover;
    background-position: center;
}

.scene-podium {
    background: linear-gradient(180deg, #e2e8f0 60%, #cbd5e1 60%, #94a3b8 100%);
}

.scene-office {
    background: linear-gradient(135deg, #1e293b 0%, #334155 50%, #475569 100%);
}

.scene-nature {
    background: linear-gradient(135deg, #166534 0%, #22c55e 50%, #86efac 100%);
}

.scene-bokeh {
    background: radial-gradient(circle at 30% 40%, #fbbf24 10%, #d97706 40%, #78350f 90%);
}

.scene-cafe {
    background: linear-gradient(135deg, #fed7aa 0%, #fbcfe8 50%, #f5d0fe 100%);
}

.scene-neon {
    background: linear-gradient(135deg, #09090b 0%, #581c87 50%, #06b6d4 100%);
}

.scene-title {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--agv-dark);
}

/* Custom Background Uploader */
.custom-bg-uploader {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 10px 0;
    flex-wrap: wrap;
}

.custom-bg-info {
    font-size: 0.85rem;
    color: var(--agv-dark-muted);
}

/* AI 4K Enhancer Bar */
.enhancer-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 12px 18px;
    margin-bottom: 22px;
    background: #f1f5f9;
    border-radius: var(--radius-md);
    border: 1px solid var(--agv-border);
    flex-wrap: wrap;
}

.enhancer-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.enhancer-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--agv-dark);
}

.enhancer-sub {
    font-size: 0.8rem;
    color: var(--agv-dark-muted);
}

.btn-enhance-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--agv-white);
    border: 1.5px solid #cbd5e1;
    padding: 8px 16px;
    border-radius: var(--radius-full);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--agv-dark);
    transition: all var(--transition);
}

.btn-enhance-toggle .toggle-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #94a3b8;
    transition: all var(--transition);
}

.btn-enhance-toggle.active {
    background: #ecfdf5;
    border-color: #10b981;
    color: #065f46;
}

.btn-enhance-toggle.active .toggle-indicator {
    background: #10b981;
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
}

/* Side by Side Preview */
.preview-container.side-by-side {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 28px;
}

.preview-box {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.box-label {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--agv-dark-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    text-align: left;
}

.image-frame {
    height: 380px;
    border-radius: var(--radius-md);
    border: 1px solid var(--agv-border);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
    background-color: #f8fafc;
    transition: background-color var(--transition);
}

.image-frame img {
    max-height: 100%;
    max-width: 100%;
    object-fit: contain;
}

/* Genuine Transparency Checkerboard */
.transparent-checkerboard {
    background-color: #ffffff;
    background-image: 
        linear-gradient(45deg, #e5e7eb 25%, transparent 25%), 
        linear-gradient(-45deg, #e5e7eb 25%, transparent 25%), 
        linear-gradient(45deg, transparent 75%, #e5e7eb 75%), 
        linear-gradient(-45deg, transparent 75%, #e5e7eb 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
}

/* Comparison Slider Mode */
.preview-container.slider-mode {
    margin-bottom: 28px;
}

.slider-box {
    position: relative;
    height: 420px;
    width: 100%;
    max-width: 720px;
    margin: 0 auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--agv-border);
    overflow: hidden;
    user-select: none;
}

.slider-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slider-layer img {
    max-height: 100%;
    max-width: 100%;
    object-fit: contain;
    pointer-events: none;
}

.slider-layer-modified {
    width: 50%;
    overflow: hidden;
    z-index: 2;
    border-right: 2px solid var(--agv-red);
}

.slider-range-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: ew-resize;
    z-index: 10;
}

.slider-divider-line {
    position: absolute;
    top: 0;
    left: 50%;
    height: 100%;
    width: 2px;
    background-color: var(--agv-red);
    transform: translateX(-50%);
    pointer-events: none;
    z-index: 3;
}

.slider-handle-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    background-color: var(--agv-white);
    border: 2px solid var(--agv-red);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--agv-red);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.16);
}

.result-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    position: relative;
}

/* Split Download Dropdown */
.download-split-group {
    position: relative;
    display: inline-flex;
    align-items: stretch;
}

.btn-download-main {
    border-top-right-radius: 0 !important;
    border-bottom-right-radius: 0 !important;
    border-right: 1px solid rgba(255, 255, 255, 0.3) !important;
    white-space: nowrap;
}

.btn-download-toggle {
    border-top-left-radius: 0 !important;
    border-bottom-left-radius: 0 !important;
    padding: 0 14px !important;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.download-dropdown-menu {
    position: absolute;
    bottom: calc(100% + 10px);
    left: 0;
    min-width: 310px;
    background: var(--agv-white);
    border: 1px solid var(--agv-border);
    border-radius: var(--radius-md);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.16), 0 4px 12px rgba(0, 0, 0, 0.08);
    z-index: 100;
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    animation: fadeIn 0.2s ease;
}

.download-dropdown-menu::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 40px;
    border-width: 6px;
    border-style: solid;
    border-color: var(--agv-white) transparent transparent transparent;
}

.dropdown-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 10px 14px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    text-align: left;
    cursor: pointer;
    transition: all var(--transition);
}

.dropdown-item:hover {
    background: #f8fafc;
    border-color: #e2e8f0;
}

.dropdown-item.selected {
    background: #eff6ff;
    border-color: #bfdbfe;
    border-left: 3px solid #2563eb;
}

.drop-item-content {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.drop-item-content strong {
    font-size: 0.88rem;
    color: var(--agv-dark);
}

.drop-item-content span {
    font-size: 0.74rem;
    color: var(--agv-dark-muted);
}

.check-mark {
    color: #2563eb;
    font-weight: 800;
    font-size: 1.1rem;
}

/* ==========================================================================
   Trust Highlights Section
   ========================================================================== */

.trust-section {
    padding: 34px 0;
    border-top: 1px solid var(--agv-border);
    border-bottom: 1px solid var(--agv-border);
    background-color: var(--agv-white);
}

.trust-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.trust-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    text-align: left;
}

.trust-icon {
    font-size: 1.7rem;
    flex-shrink: 0;
}

.trust-content h4 {
    font-size: 0.98rem;
    font-weight: 700;
    color: var(--agv-dark);
    margin-bottom: 4px;
}

.trust-content p {
    font-size: 0.85rem;
    color: var(--agv-gray);
    line-height: 1.45;
}

/* ==========================================================================
   How It Works & Content Sections
   ========================================================================== */

section {
    padding: 70px 0;
}

.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 48px;
}

.section-title {
    font-size: 2.3rem;
    font-weight: 800;
    color: var(--agv-dark);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    font-size: 1.08rem;
    color: var(--agv-gray);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.step-card {
    background-color: var(--agv-white);
    padding: 38px 28px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--agv-border);
    text-align: left;
    transition: transform var(--transition), box-shadow var(--transition);
}

.step-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.step-num {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--agv-red);
    opacity: 0.85;
    margin-bottom: 14px;
}

.step-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--agv-dark);
    margin-bottom: 10px;
}

.step-card p {
    font-size: 0.94rem;
    color: var(--agv-gray);
    line-height: 1.55;
}

/* Use Cases */
.section-use-cases {
    background-color: var(--agv-white);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
}

.use-case-card {
    padding: 30px 22px;
    border-radius: var(--radius-md);
    background-color: var(--agv-bg-light);
    border: 1px solid var(--agv-border);
    text-align: left;
    transition: transform var(--transition);
}

.use-case-card:hover {
    transform: translateY(-4px);
    border-color: #cbd5e1;
}

.card-icon {
    font-size: 2.2rem;
    margin-bottom: 14px;
}

.use-case-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--agv-dark);
    margin-bottom: 8px;
}

.use-case-card p {
    font-size: 0.9rem;
    color: var(--agv-gray);
    line-height: 1.5;
}

/* Features */
.features-list-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 920px;
    margin: 0 auto;
}

.feature-box {
    background-color: var(--agv-white);
    padding: 26px;
    border-radius: var(--radius-md);
    border: 1px solid var(--agv-border);
    display: flex;
    gap: 16px;
    text-align: left;
    align-items: flex-start;
}

.feature-check {
    background-color: var(--agv-red-subtle);
    color: var(--agv-red);
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    flex-shrink: 0;
}

.feature-box h4 {
    font-size: 1.08rem;
    font-weight: 700;
    color: var(--agv-dark);
    margin-bottom: 4px;
}

.feature-box p {
    font-size: 0.9rem;
    color: var(--agv-gray);
}

/* ==========================================================================
   SEO Informational Sections & Blog Layouts
   ========================================================================== */

.seo-intro-card {
    background-color: var(--agv-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--agv-border);
    padding: 40px;
    margin-bottom: 48px;
    text-align: left;
}

.seo-intro-card h3 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--agv-dark);
    margin-bottom: 12px;
}

.seo-intro-card p {
    font-size: 1.05rem;
    color: var(--agv-gray);
    line-height: 1.7;
    margin-bottom: 24px;
}

.seo-highlights-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.seo-highlight-item {
    background-color: #f8fafc;
    padding: 20px;
    border-radius: var(--radius-md);
    border: 1px solid var(--agv-border);
}

.seo-highlight-item .icon {
    font-size: 1.8rem;
    margin-bottom: 8px;
}

.seo-highlight-item h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--agv-dark);
    margin-bottom: 6px;
}

.seo-highlight-item p {
    font-size: 0.88rem;
    color: var(--agv-gray);
    line-height: 1.5;
    margin-bottom: 0;
}

/* Blog Article Layout */
.blog-article-wrapper {
    max-width: 820px;
    margin: 0 auto;
    text-align: left;
}

.blog-meta-bar {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.88rem;
    color: var(--agv-gray);
    margin-bottom: 24px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--agv-border);
    flex-wrap: wrap;
}

.blog-meta-bar strong {
    color: var(--agv-dark);
}

.blog-excerpt {
    font-size: 1.2rem;
    line-height: 1.6;
    color: var(--agv-dark-muted);
    font-weight: 500;
    margin-bottom: 32px;
    padding-left: 18px;
    border-left: 4px solid var(--agv-red);
}

.blog-body {
    font-size: 1.05rem;
    color: #334155;
    line-height: 1.8;
}

.blog-body h2 {
    font-size: 1.65rem;
    font-weight: 800;
    color: var(--agv-dark);
    margin: 38px 0 16px;
    letter-spacing: -0.4px;
}

.blog-body h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--agv-dark);
    margin: 28px 0 12px;
}

.blog-body p {
    margin-bottom: 20px;
}

.blog-body ul, .blog-body ol {
    margin: 16px 0 24px 24px;
}

.blog-body li {
    margin-bottom: 10px;
}

.guide-steps {
    list-style: none;
    counter-reset: step-counter;
    margin-left: 0 !important;
}

.guide-steps li {
    counter-increment: step-counter;
    background-color: var(--agv-white);
    padding: 20px 24px;
    border-radius: var(--radius-md);
    border: 1px solid var(--agv-border);
    margin-bottom: 16px;
    position: relative;
}

.table-responsive {
    overflow-x: auto;
    margin: 28px 0;
}

.agv-spec-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--agv-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--agv-border);
}

.agv-spec-table th, .agv-spec-table td {
    padding: 14px 18px;
    text-align: left;
    border-bottom: 1px solid var(--agv-border);
    font-size: 0.95rem;
}

.agv-spec-table th {
    background-color: #f8fafc;
    font-weight: 700;
    color: var(--agv-dark);
}

/* Blog Cards Grid for Sitemap/Homepage */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-top: 36px;
}

.blog-card {
    background-color: var(--agv-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--agv-border);
    padding: 30px;
    text-align: left;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform var(--transition), box-shadow var(--transition);
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.blog-card h3 {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--agv-dark);
    margin-bottom: 10px;
}

.blog-card p {
    font-size: 0.92rem;
    color: var(--agv-gray);
    line-height: 1.55;
    margin-bottom: 18px;
    flex-grow: 1;
}

.blog-card .read-more {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--agv-red);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* ==========================================================================
   FAQ Accordion
   ========================================================================== */

.faq-container {
    max-width: 800px;
}

.faq-accordion {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.faq-item {
    background-color: var(--agv-white);
    border: 1px solid var(--agv-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    text-align: left;
    transition: border-color var(--transition);
}

.faq-item[open] {
    border-color: #cbd5e1;
}

.faq-question {
    padding: 20px 24px;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--agv-dark);
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
}

.faq-question::-webkit-details-marker {
    display: none;
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--agv-red);
    transition: transform var(--transition);
}

.faq-item[open] .faq-question::after {
    content: '−';
}

.faq-answer {
    padding: 0 24px 22px;
    font-size: 0.96rem;
    color: var(--agv-gray);
    line-height: 1.6;
    border-top: 1px solid #f8fafc;
}

/* ==========================================================================
   Footer (Matches Header Background Color Per User Requirement)
   ========================================================================== */

.agv-footer {
    background-color: var(--footer-bg); /* EXACT MATCH TO HEADER BACKGROUND */
    color: var(--footer-text);
    border-top: 1px solid var(--footer-border);
    padding: 60px 0 0;
    transition: background-color var(--transition), color var(--transition), border-color var(--transition);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    text-align: left;
    padding-bottom: 50px;
}

.footer-brand h3 {
    color: var(--text-primary);
    font-size: 1.35rem;
    margin: 14px 0 8px;
}

.footer-brand p {
    font-size: 0.92rem;
    color: var(--footer-muted);
    margin-bottom: 14px;
    line-height: 1.6;
}

.footer-main-link {
    display: inline-block;
    color: var(--agv-red);
    font-weight: 600;
    font-size: 0.9rem;
    transition: color var(--transition);
}

.footer-main-link:hover {
    color: var(--agv-red-hover);
    text-decoration: underline;
}

.footer-nav-col h4 {
    color: var(--footer-heading);
    font-size: 0.96rem;
    font-weight: 700;
    margin-bottom: 18px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-nav-col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-nav-col a {
    font-size: 0.9rem;
    color: var(--footer-muted);
    transition: color var(--transition);
}

.footer-nav-col a:hover {
    color: var(--agv-red);
}

.footer-bottom {
    border-top: 1px solid var(--footer-border);
    padding: 24px 0;
    font-size: 0.85rem;
    color: var(--footer-muted);
}

.bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

/* ==========================================================================
   Responsive Breakpoints & Universal Device Presets
   Optimized for:
   - iPhone 16/Plus/Pro/Max/16e, iPhone 12–15, SE, XR
   - Pixel 7, 8, 8a, 9, 9 Pro XL, 10, Pixel Fold
   - Samsung Galaxy S8+, S20 Ultra, A51/71, A55, Z Fold 5/6
   - Foldables: Surface Duo, Asus Zenbook Fold
   - Tablets: iPad Mini, iPad Pro 13, Surface Pro 7/10, Galaxy Tab S4
   - Smart Displays: Nest Hub Max (1280×800)
   - Compact: JioPhone 2 (320px), Moto G4/Power
   ========================================================================== */

/* 1. Ultra-Wide & 4K Displays (1440px+) */
@media (min-width: 1440px) {
    .container {
        max-width: 1280px;
    }
    .image-frame, .slider-box {
        height: 440px;
    }
}

/* 2. Smart Displays & Small Laptops (1025px - 1280px, e.g. Nest Hub Max 1280x800) */
@media (min-width: 1025px) and (max-width: 1280px) {
    .container {
        max-width: 1060px;
    }
    .hero-title {
        font-size: 2.5rem;
    }
    .image-frame, .slider-box {
        height: 380px;
    }
}

/* 3. Tablets & Large Foldables (769px - 1024px, e.g. iPad Pro 13, Surface Pro 7/10) */
@media (max-width: 1024px) {
    .trust-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .use-cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
    .seo-highlights-grid {
        grid-template-columns: 1fr;
    }
    .blog-grid {
        grid-template-columns: 1fr;
    }
    .preview-container.side-by-side {
        gap: 16px;
    }
    .image-frame, .slider-box {
        height: 340px;
    }
}

/* 4. Foldables & Small Tablets (540px - 768px, e.g. Surface Duo, Galaxy Z Fold 5/6, iPad Mini, Galaxy Tab S4) */
@media (max-width: 768px) {
    .header-main-bar {
        height: auto;
        padding: 8px 0 6px;
    }

    .brand-header-logo {
        height: 32px;
        max-width: 140px;
    }

    .theme-opt-btn {
        padding: 4px 8px;
        font-size: 0.74rem;
        gap: 3px;
    }

    .agv-nav-bar {
        padding: 6px 0 8px;
        gap: 6px;
    }

    .nav-pill {
        padding: 5px 12px;
        font-size: 0.78rem;
    }

    .hero-title {
        font-size: 2.1rem;
    }

    .hero-description {
        font-size: 0.95rem;
    }

    .upload-zone {
        padding: 34px 18px;
        margin: 10px;
    }

    .upload-heading {
        font-size: 1.2rem;
    }

    .preview-container.side-by-side {
        grid-template-columns: 1fr;
    }

    .image-frame, .slider-box {
        height: 310px;
    }

    .steps-grid {
        grid-template-columns: 1fr;
    }

    .features-list-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .bottom-content {
        flex-direction: column;
        text-align: center;
    }

    .seo-intro-card {
        padding: 22px;
    }

    .bg-studio-panel {
        padding: 12px 14px;
    }

    .scenes-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .download-split-group {
        width: 100%;
    }

    .btn-download-main {
        flex: 1;
    }
}

/* Dual-Screen Foldable Posture Support (Surface Duo, Pixel 9 Pro Fold) */
@media (screen-spanning: single-fold-vertical), (horizontal-viewport-segments: 2) {
    .preview-container.side-by-side {
        grid-template-columns: 1fr 1fr;
        gap: env(fold-width, 24px);
    }
}

/* 5. Modern Smartphones (375px - 480px, e.g. iPhone 16/16 Pro/16 Plus/16 Pro Max, Pixel 7–10, Galaxy S20/A55) */
@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }

    .upload-icon-circle {
        width: 60px;
        height: 60px;
    }

    .trust-grid {
        grid-template-columns: 1fr;
    }

    .btn-large {
        width: 100%;
        padding: 13px 18px;
        font-size: 0.92rem;
    }

    .result-actions {
        flex-direction: column;
        width: 100%;
    }

    .result-actions .btn,
    .result-actions .download-split-group {
        width: 100%;
    }

    .download-dropdown-menu {
        width: 100%;
        min-width: 100%;
        left: 0;
        right: 0;
    }

    .brand-header-logo {
        height: 32px;
        max-width: 140px;
    }

    .brand-footer-logo {
        height: 42px;
        max-width: 180px;
    }

    .scenes-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .image-frame, .slider-box {
        height: 270px;
    }

    .ai-recommendation-bar {
        flex-direction: column;
        align-items: flex-start;
    }

    .btn-ai-apply {
        width: 100%;
        text-align: center;
    }

    .enhancer-bar {
        flex-direction: column;
        align-items: flex-start;
    }

    .btn-enhance-toggle {
        width: 100%;
        justify-content: center;
    }
}

/* 6. Compact Screens & Feature Phones (<= 360px, e.g. JioPhone 2 320px, Moto G4, iPhone SE 1st Gen) */
@media (max-width: 360px) {
    .container {
        padding: 0 10px;
    }

    .hero-title {
        font-size: 1.5rem;
    }

    .agv-tool-card {
        padding: 12px 10px;
    }

    .image-frame, .slider-box {
        height: 230px;
    }

    .studio-tab {
        padding: 5px 10px;
        font-size: 0.78rem;
    }

    .swatch-circle {
        width: 28px;
        height: 28px;
    }

    .swatch-label {
        font-size: 0.68rem;
    }

    .scenes-grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   Comprehensive Dark Theme Overrides (Pure Dark Black Palette)
   ========================================================================== */

[data-theme="dark"] body {
    background-color: #000000 !important;
    color: #f1f5f9;
}

[data-theme="dark"] .hero-title,
[data-theme="dark"] .section-title,
[data-theme="dark"] .result-heading,
[data-theme="dark"] .upload-heading,
[data-theme="dark"] .trust-content h4,
[data-theme="dark"] .step-card h3,
[data-theme="dark"] .use-case-card h3,
[data-theme="dark"] .feature-box h3,
[data-theme="dark"] .blog-card h3,
[data-theme="dark"] .blog-body h2,
[data-theme="dark"] .blog-body h3,
[data-theme="dark"] .faq-question,
[data-theme="dark"] .seo-highlight-item h4 {
    color: #f8fafc;
}

[data-theme="dark"] .hero-description,
[data-theme="dark"] .upload-subtext,
[data-theme="dark"] .section-subtitle,
[data-theme="dark"] .trust-content p,
[data-theme="dark"] .step-card p,
[data-theme="dark"] .use-case-card p,
[data-theme="dark"] .feature-box p,
[data-theme="dark"] .blog-card p,
[data-theme="dark"] .blog-body,
[data-theme="dark"] .faq-answer,
[data-theme="dark"] .seo-highlight-item p {
    color: #94a3b8;
}

/* Tool Card & Zones */
[data-theme="dark"] .agv-tool-card {
    background-color: #0d0d0d;
    border: 1px solid #222222;
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.8);
}

[data-theme="dark"] .upload-zone {
    background-color: #121212;
    border-color: #2b2b2b;
}

[data-theme="dark"] .upload-zone:hover {
    border-color: var(--agv-red);
    background-color: #171717;
}

[data-theme="dark"] .sample-chip {
    background-color: #181818;
    border-color: #2e2e2e;
    color: #f1f5f9;
}

[data-theme="dark"] .sample-chip:hover {
    border-color: var(--agv-red);
    color: #ff4d4d;
}

/* Studio & Views */
[data-theme="dark"] .bg-studio-panel {
    background-color: #121212;
    border: 1px solid #242424;
}

[data-theme="dark"] .studio-tab {
    color: #94a3b8;
}

[data-theme="dark"] .studio-tab:hover {
    color: #f1f5f9;
}

[data-theme="dark"] .studio-tab.active {
    background-color: #202020;
    color: #ffffff;
    border-color: #383838;
}

[data-theme="dark"] .color-swatch-item {
    background-color: #181818;
    border-color: #2a2a2a;
    color: #cbd5e1;
}

[data-theme="dark"] .color-swatch-item:hover {
    border-color: #444444;
}

[data-theme="dark"] .color-swatch-item.active {
    border-color: var(--agv-red);
    background-color: rgba(216, 1, 0, 0.15);
    color: #ffffff;
}

[data-theme="dark"] .scene-preview-card {
    background-color: #181818;
    border-color: #2a2a2a;
    color: #cbd5e1;
}

[data-theme="dark"] .scene-preview-card.active {
    border-color: var(--agv-red);
    color: #ffffff;
}

[data-theme="dark"] .custom-bg-dropzone {
    background-color: #181818;
    border-color: #2a2a2a;
}

[data-theme="dark"] .toggle-btn {
    background-color: #181818;
    color: #94a3b8;
    border-color: #2a2a2a;
}

[data-theme="dark"] .toggle-btn.active {
    background-color: #282828;
    color: #ffffff;
    border-color: #404040;
}

/* Enhancer & Recommendation */
[data-theme="dark"] .ai-recommendation-bar {
    background: linear-gradient(135deg, #1c1505 0%, #151515 100%);
    border-color: #3d3010;
}

[data-theme="dark"] .ai-rec-text {
    color: #fde68a;
}

[data-theme="dark"] .enhancer-bar {
    background-color: #121212;
    border-color: #242424;
}

[data-theme="dark"] .enhancer-desc {
    color: #94a3b8;
}

[data-theme="dark"] .btn-enhance-toggle {
    background-color: #181818;
    border-color: #2e2e2e;
    color: #94a3b8;
}

[data-theme="dark"] .btn-enhance-toggle.active {
    background-color: #2563eb;
    color: #ffffff;
}

/* Download Dropdown */
[data-theme="dark"] .download-dropdown-menu {
    background-color: #121212;
    border-color: #262626;
    box-shadow: 0 14px 35px rgba(0, 0, 0, 0.85);
}

[data-theme="dark"] .dropdown-header {
    background-color: #181818;
    border-bottom-color: #242424;
    color: #94a3b8;
}

[data-theme="dark"] .dropdown-item {
    border-bottom-color: #1c1c1c;
}

[data-theme="dark"] .dropdown-item:hover {
    background-color: #1a1a1a;
}

[data-theme="dark"] .dropdown-item.selected {
    background-color: rgba(37, 99, 235, 0.16);
    border-color: #1d4ed8;
}

[data-theme="dark"] .drop-item-content strong {
    color: #f8fafc;
}

[data-theme="dark"] .drop-item-content span {
    color: #94a3b8;
}

/* Sections & Cards */
[data-theme="dark"] .trust-section {
    background-color: #080808;
    border-color: #1f1f1f;
}

[data-theme="dark"] .step-card {
    background-color: #0d0d0d;
    border-color: #202020;
}

[data-theme="dark"] .section-use-cases {
    background-color: #060606;
}

[data-theme="dark"] .use-case-card {
    background-color: #0e0e0e;
    border-color: #202020;
}

[data-theme="dark"] .use-case-card:hover {
    border-color: #383838;
}

[data-theme="dark"] .feature-box {
    background-color: #0d0d0d;
    border-color: #202020;
}

[data-theme="dark"] .blog-card {
    background-color: #0d0d0d;
    border-color: #202020;
}

[data-theme="dark"] .faq-item {
    background-color: #0d0d0d;
    border-color: #202020;
}

[data-theme="dark"] .faq-item[open] {
    border-color: #383838;
}

[data-theme="dark"] .faq-answer {
    border-top-color: #1a1a1a;
}

[data-theme="dark"] .seo-intro-card {
    background-color: #0d0d0d;
    border-color: #202020;
}

[data-theme="dark"] .seo-highlight-item {
    background-color: #121212;
    border-color: #222222;
}

[data-theme="dark"] .guide-steps li {
    background-color: #0d0d0d;
    border-color: #202020;
}

[data-theme="dark"] .agv-spec-table {
    background-color: #0d0d0d;
    border-color: #202020;
}

[data-theme="dark"] .agv-spec-table th {
    background-color: #141414;
    color: #f1f5f9;
    border-bottom-color: #222222;
}

[data-theme="dark"] .agv-spec-table td {
    border-bottom-color: #1c1c1c;
    color: #cbd5e1;
}

[data-theme="dark"] .btn-secondary {
    background-color: #161616;
    border-color: #2c2c2c;
    color: #f1f5f9;
}

[data-theme="dark"] .btn-secondary:hover {
    background-color: #222222;
    border-color: #3c3c3c;
}