/* =========================================================
   Transform Vault — AI Transformation Video Prompt Guide
   Premium Single-Page Web App Styles (Dark & Blue Theme)
   ========================================================= */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
    /* Colors (Dark Mode Default) */
    --bg-primary: #050505;
    --bg-secondary: #0a0a0a;
    --bg-card: #0f0f0f;
    --bg-card-hover: #141414;
    --bg-glass: rgba(10, 10, 10, 0.5);

    --text-primary: #f0f0f0;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;

    --accent-1: #007bff;
    --accent-2: #00d2ff;
    --accent-3: #00a2ff;
    --accent-gradient: linear-gradient(135deg, #007bff, #00d2ff);
    --accent-gradient-h: linear-gradient(90deg, #007bff, #00d2ff);

    --amber: #f59e0b;
    --emerald: #10b981;
    --rose: #f43f5e;
    --cyan: #22d3ee;

    --border: #1f2937;
    --border-accent: rgba(0, 123, 255, 0.3);

    /* Typography */
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Sizing */
    --container-max: 1200px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 24px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 48px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 30px rgba(0, 123, 255, 0.15);

    /* Transitions */
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

.light-theme {
    --bg-primary: #ffffff;
    --bg-secondary: #f3f4f6;
    --bg-card: #f9fafb;
    --bg-card-hover: #f3f4f6;
    --bg-glass: rgba(255, 255, 255, 0.5);

    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-muted: #9ca3af;
    --accent-2: #007bff;

    --border: #e5e7eb;
    --border-accent: rgba(0, 123, 255, 0.3);

    --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 24px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 48px rgba(0,0,0,0.12);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background: rgba(0, 123, 255, 0.4);
    color: #fff;
}

/* --- Ambient Background --- */
.ambient-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.12;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--accent-1);
    top: -15%;
    right: -10%;
    animation: float1 20s ease-in-out infinite;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: var(--accent-2);
    bottom: -10%;
    left: -10%;
    animation: float2 25s ease-in-out infinite;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: var(--accent-3);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: float3 18s ease-in-out infinite;
}

@keyframes float1 {
    0%, 100% { transform: translate(0, 0); }
    33% { transform: translate(-40px, 60px); }
    66% { transform: translate(30px, -40px); }
}

@keyframes float2 {
    0%, 100% { transform: translate(0, 0); }
    33% { transform: translate(50px, -30px); }
    66% { transform: translate(-30px, 50px); }
}

@keyframes float3 {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-50%, -50%) scale(1.2); }
}

/* --- Container --- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all 0.3s var(--ease);
    background: transparent;
}

.navbar.scrolled {
    padding: 12px 0;
}
.navbar.scrolled::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--bg-glass);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border);
    z-index: -1;
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    white-space: nowrap;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.nav-logo img {
    height: 36px;
    width: auto;
    border-radius: 4px;
}

.logo-highlight {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    transition: all 0.25s var(--ease);
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
    background: rgba(0, 123, 255, 0.1);
}

.nav-controls {
    display: flex;
    align-items: center;
}

.lang-switcher {
    margin-left: 16px;
    display: flex;
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 100px;
    padding: 2px;
}

.lang-switcher .lang-btn {
    display: inline-block;
    padding: 4px 12px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 100px;
    transition: all 0.2s ease;
    line-height: 1.2;
}

.lang-btn.active {
    background: var(--accent-gradient);
    color: #fff;
}

.mobile-theme-item {
    display: none;
}

.theme-switcher {
    margin-left: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 34px;
    height: 34px;
    cursor: pointer;
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.theme-switcher:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-1);
}

.theme-switcher svg {
    width: 16px;
    height: 16px;
}

.light-theme .theme-sun { display: none; }
.light-theme .theme-moon { display: block; }
:root:not(.light-theme) .theme-sun { display: block; }
:root:not(.light-theme) .theme-moon { display: none; }

.nav-toggle {
    display: none;
    flex-direction: column;
    margin-left: 16px;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s var(--ease);
}

/* --- Hero Section --- */
.hero {
    position: relative;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
    z-index: 1;
    overflow: hidden;
    background-image: linear-gradient(to bottom, var(--bg-glass), var(--bg-primary)), url('../images/backraund-hero.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    position: relative;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    border: 1px solid var(--border-accent);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--accent-2);
    background: rgba(0, 123, 255, 0.06);
    margin-bottom: 28px;
    animation: fadeInDown 0.8s var(--ease) both;
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-2);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s var(--ease) 0.1s both;
}

.hero-gradient {
    display: block;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 640px;
    margin: 0 auto 40px;
    animation: fadeInUp 0.8s var(--ease) 0.2s both;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 56px;
    animation: fadeInUp 0.8s var(--ease) 0.3s both;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    font-family: var(--font-body);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s var(--ease);
    border: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: #fff;
    box-shadow: 0 4px 20px rgba(0, 123, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(0, 123, 255, 0.45);
}

.btn-ghost {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-ghost:hover {
    background: rgba(255,255,255,0.05);
    border-color: rgba(156, 163, 175, 0.3);
}

/* Hero Stats */
.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    animation: fadeInUp 0.8s var(--ease) 0.4s both;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 500;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border);
}

/* Hero Visual Logo */
.hero-visual {
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1;
    opacity: 0.2;
    animation: float3 8s ease-in-out infinite;
}

.hero-visual img {
    width: 300px;
    height: auto;
    filter: drop-shadow(0 0 40px rgba(0, 123, 255, 0.6));
    border-radius: 12px;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    animation: fadeInUp 0.8s var(--ease) 0.5s both;
}

.scroll-arrow {
    width: 20px;
    height: 30px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    position: relative;
}

.scroll-arrow::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--accent-2);
    border-radius: 4px;
    animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
    0%, 100% { top: 6px; opacity: 1; }
    50% { top: 14px; opacity: 0.3; }
}

/* --- Animations --- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-16px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Sections --- */
.section {
    position: relative;
    padding: 100px 0;
    z-index: 1;
}

.section-dark {
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--accent-2);
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.2;
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto;
}

/* --- Introduction Section --- */
.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.intro-lead {
    font-size: 1.2rem;
    line-height: 1.8;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.intro-text {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.8;
}

.intro-text strong {
    color: var(--text-primary);
}

.intro-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: all 0.35s var(--ease);
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.feature-icon {
    width: 32px;
    height: 32px;
    margin-bottom: 16px;
    color: var(--accent-1);
}

.feature-card h3 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* --- Tools Section --- */
.tools-grid {
    display: grid;
    grid-template-columns: 1fr 1.4fr 1fr;
    gap: 24px;
    margin-bottom: 32px;
}

.tool-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all 0.35s var(--ease);
}

.tool-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.tool-card-featured {
    border-color: var(--border-accent);
    background: linear-gradient(135deg, rgba(0, 123, 255, 0.08), rgba(0, 162, 255, 0.04));
    position: relative;
    overflow: hidden;
}

.tool-card-featured::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-gradient);
}

.tool-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.tool-icon-wrap {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 123, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--accent-1);
}

.tool-badge {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
    padding: 4px 10px;
    border: 1px solid var(--border);
    border-radius: 100px;
}

.badge-primary {
    color: var(--accent-2);
    border-color: var(--border-accent);
    background: rgba(0, 123, 255, 0.08);
}

.tool-title {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.4;
}

.tool-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.tool-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.tool-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-2);
    flex-shrink: 0;
}

.tools-note {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px 24px;
    background: rgba(0, 123, 255, 0.05);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-md);
}

.note-icon {
    width: 24px;
    height: 24px;
    color: var(--accent-2);
    flex-shrink: 0;
    margin-top: 2px;
}

.tools-note p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.tools-note p strong {
    color: var(--text-primary);
}

/* --- Workflow Section --- */
.workflow-intro {
    max-width: 800px;
    margin: 0 auto 40px;
    text-align: center;
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.workflow-intro strong {
    color: var(--text-primary);
}

.workflow-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
    font-family: var(--font-body);
    cursor: pointer;
    transition: all 0.3s var(--ease);
}

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

.tab-btn.active {
    background: linear-gradient(135deg, rgba(0, 123, 255, 0.15), rgba(0, 210, 255, 0.05));
    border-color: var(--border-accent);
    color: var(--text-primary);
    box-shadow: 0 0 20px rgba(0, 123, 255, 0.1);
}

.tab-btn.active svg {
    color: var(--accent-2);
}

.tab-btn:hover:not(.active) {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.tab-content {
    display: none;
    max-width: 700px;
    margin: 0 auto;
}

.tab-content.active {
    display: block;
    animation: fadeInUp 0.4s var(--ease) both;
}

/* Steps Timeline */
.steps-timeline {
    position: relative;
    padding-left: 48px;
}

.steps-timeline::before {
    content: '';
    position: absolute;
    left: 19px;
    top: 12px;
    bottom: 12px;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent-1), var(--accent-3));
    border-radius: 2px;
}

.step {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 28px;
    position: relative;
}

.step:last-child {
    margin-bottom: 0;
}

.step-number {
    position: absolute;
    left: -48px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    border: 2px solid var(--accent-1);
    border-radius: 50%;
    font-size: 0.85rem;
    font-weight: 800;
    color: var(--accent-2);
    z-index: 2;
}

.step-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 18px 24px;
    flex: 1;
    transition: all 0.3s var(--ease);
}

.step-content:hover {
    border-color: var(--border-accent);
    box-shadow: var(--shadow-glow);
}

.step-content p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.step-content p strong {
    color: var(--text-primary);
}

/* --- 3-Part Prompt System --- */
.system-grid {
    display: flex;
    align-items: stretch;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
}

.system-card {
    flex: 1;
    min-width: 260px;
    max-width: 340px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: all 0.35s var(--ease);
    position: relative;
    overflow: hidden;
}

.system-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.system-card-featured {
    border-color: var(--accent-1);
    background: linear-gradient(135deg, rgba(0, 123, 255, 0.08), rgba(0, 162, 255, 0.04));
}

.system-card-featured::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-gradient);
}

.system-number {
    font-size: 2.5rem;
    font-weight: 900;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.4;
    margin-bottom: 12px;
}

.system-label {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.system-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.system-arrow {
    display: flex;
    align-items: center;
    color: var(--accent-2);
    flex-shrink: 0;
    opacity: 0.4;
}

.system-tag-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.sys-tag {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 4px 10px;
    background: rgba(0, 123, 255, 0.1);
    border: 1px solid var(--border-accent);
    border-radius: 100px;
    color: var(--accent-2);
}

.system-insight {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-top: 48px;
    padding: 24px;
    background: rgba(0, 123, 255, 0.06);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-md);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.insight-icon {
    width: 24px;
    height: 24px;
    color: var(--accent-2);
    flex-shrink: 0;
}

.system-insight p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.system-insight p strong {
    color: var(--text-primary);
}

/* --- Placeholder Table --- */
.placeholder-table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    background: var(--bg-card);
}

.placeholder-table {
    width: 100%;
    min-width: 650px;
    border-collapse: collapse;
}

.placeholder-table thead {
    background: rgba(0, 123, 255, 0.08);
}

.placeholder-table th {
    text-align: left;
    padding: 16px 24px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent-2);
    border-bottom: 1px solid var(--border);
}

.placeholder-table td {
    padding: 16px 24px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    vertical-align: top;
}

.placeholder-table tr:last-child td {
    border-bottom: none;
}

.placeholder-table code {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--accent-3);
    background: rgba(0, 162, 255, 0.08);
    padding: 3px 8px;
    border-radius: 4px;
    white-space: nowrap;
}

/* --- Prompts Section --- */
.prompt-block {
    margin-bottom: 48px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.35s var(--ease);
}

.prompt-block:hover {
    border-color: var(--border-accent);
    box-shadow: 0 0 40px rgba(0, 123, 255, 0.08);
}

.prompt-block-featured {
    border-color: var(--accent-1);
    position: relative;
}

.prompt-block-featured::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-gradient);
    z-index: 2;
}

.prompt-header {
    padding: 32px 32px 24px;
}

.prompt-label {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 12px;
}

.prompt-number {
    display: inline-block;
    white-space: nowrap;
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 5px 12px;
    background: var(--accent-gradient);
    color: #fff;
    border-radius: 100px;
}

.prompt-number-star {
    background: linear-gradient(135deg, #f59e0b, #ef4444);
}

.prompt-label h3 {
    font-size: 1.25rem;
    font-weight: 700;
}

.prompt-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.prompt-code-wrap {
    margin: 0 20px 20px;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
}

.prompt-code-wrap.locked-content {
    min-height: 350px;
}

.prompt-code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    background: rgba(0, 123, 255, 0.08);
    border-bottom: 1px solid var(--border);
}

.prompt-code-header span {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent-2);
}

.copy-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: rgba(0, 123, 255, 0.12);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-sm);
    color: var(--accent-2);
    font-family: var(--font-body);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s var(--ease);
}

.copy-btn:hover {
    background: rgba(0, 123, 255, 0.2);
    transform: translateY(-1px);
}

.copy-btn.copied {
    background: rgba(16, 185, 129, 0.15);
    border-color: rgba(16, 185, 129, 0.3);
    color: var(--emerald);
}

.prompt-code {
    padding: 24px;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    line-height: 1.85;
    color: var(--text-secondary);
    background: rgba(0,0,0,0.2);
    white-space: pre-wrap;
    word-wrap: break-word;
    max-height: 400px;
    overflow-y: auto;
    margin: 0;
}

.prompt-code::-webkit-scrollbar {
    width: 6px;
}

.prompt-code::-webkit-scrollbar-track {
    background: transparent;
}

.prompt-code::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

/* Timeline Cheatsheet */
.timeline-cheatsheet {
    margin: 0 20px 20px;
    padding: 24px;
    background: rgba(0, 123, 255, 0.04);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
}

.timeline-cheatsheet h4 {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.timeline-cheatsheet h4 svg {
    color: var(--accent-2);
}

.timeline-items {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.timeline-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: all 0.3s var(--ease);
}

.timeline-item:hover {
    border-color: var(--border-accent);
}

.tl-time {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent-2);
    min-width: 64px;
    flex-shrink: 0;
}

.tl-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
}

/* --- Example Section --- */
.example-card {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.example-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 28px 32px;
    background: linear-gradient(135deg, rgba(0, 123, 255, 0.08), rgba(0, 162, 255, 0.04));
    border-bottom: 1px solid var(--border);
}

.example-icon {
    width: 32px;
    height: 32px;
    color: var(--accent-2);
}

.example-header h3 {
    font-size: 1.2rem;
    font-weight: 700;
}

.example-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    background: var(--border);
}

.example-item {
    padding: 20px 24px;
    background: var(--bg-card);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.example-label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent-3);
}

.example-value {
    font-size: 0.95rem;
    color: var(--text-primary);
    font-weight: 500;
}

.example-instruction {
    padding: 20px 28px;
    border-top: 1px solid var(--border);
}

.example-instruction p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.example-instruction strong {
    color: var(--text-primary);
}

/* --- Tips Section --- */
.tips-grid {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}

.tip-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all 0.35s var(--ease);
    position: relative;
    overflow: hidden;
    width: 100%;
    max-width: 450px;
    min-height: 220px;
}

.tip-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.tip-number {
    font-size: 2.5rem;
    font-weight: 900;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.3;
    line-height: 1;
    margin-bottom: 16px;
}

.tip-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.tip-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* --- Footer --- */
.footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--border);
    padding: 48px 0;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.footer-brand img {
    height: 32px;
    border-radius: 4px;
}

.footer-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.footer-disclaimer {
    font-size: 0.8rem;
    color: var(--text-muted);
    max-width: 480px;
}

.footer-edition {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-top: 8px;
}

/* --- Back to Top --- */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50%;
    color: var(--text-primary);
    cursor: pointer;
    z-index: 100;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s var(--ease);
    box-shadow: var(--shadow-md);
}

.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--accent-1);
    border-color: var(--accent-1);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 123, 255, 0.3);
}

/* --- Scroll Reveal Animation --- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .tools-grid {
        grid-template-columns: 1fr;
    }

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

    .system-arrow {
        display: none;
    }

    .system-grid {
        flex-direction: column;
        align-items: center;
    }

    .system-card {
        max-width: 100%;
    }
}

@media (max-width: 1024px) {
    .nav-links {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        background: var(--bg-primary);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        gap: 16px;
        z-index: 999;
    }

    .nav-links.open {
        display: flex;
    }

    .nav-links a {
        font-size: 1.2rem;
        padding: 12px 24px;
    }
    
    .lang-switcher {
        margin-left: 8px;
    }

    .nav-controls .theme-switcher {
        display: none;
    }

    .mobile-theme-item {
        display: block;
        margin-top: 16px;
    }

    .nav-toggle {
        display: flex;
        z-index: 1001;
    }

    .nav-toggle.open span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    .nav-toggle.open span:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle.open span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero {
        padding: 100px 16px 60px;
        background-image: linear-gradient(to bottom, var(--bg-glass), var(--bg-primary)), url('../images/backraund-hero-mobile.png');
    }

    .hero-visual {
        display: none;
    }

    .hero-stats {
        gap: 20px;
    }

    .stat-number {
        font-size: 1.6rem;
    }

    .section {
        padding: 64px 0;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .intro-cards {
        grid-template-columns: 1fr;
    }

    .workflow-tabs {
        flex-direction: column;
        align-items: center;
    }

    .tab-btn {
        width: 100%;
        max-width: 340px;
        justify-content: center;
    }

    .prompt-header {
        padding: 24px 20px 16px;
    }

    .prompt-code-wrap {
        margin: 0 12px 12px;
    }

    .prompt-code {
        padding: 16px;
        font-size: 0.76rem;
    }

    .timeline-cheatsheet {
        margin: 0 12px 12px;
    }

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

    /* tips-grid centered globally, grid columns removed */

    .placeholder-table th,
    .placeholder-table td {
        padding: 12px 16px;
        font-size: 0.82rem;
    }
}

@media (max-width: 480px) {
    .nav-logo {
        font-size: 1.2rem;
    }
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

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

    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
}


/* --- Example Images --- */
.example-images {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    padding: 24px;
    background: var(--bg-card);
    border-top: 1px solid var(--border);
}

.example-image-box {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.image-label {
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent-2);
}

.result-img {
    width: 100%;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    transition: all 0.3s var(--ease);
}

.result-img:hover {
    border-color: var(--border-accent);
    box-shadow: var(--shadow-glow);
}

@media (max-width: 1024px) {
    .example-images {
        grid-template-columns: 1fr;
    }
}
/* --- Locked Content UI (Public Site) --- */
.locked-content {
    position: relative;
    user-select: none;
    overflow: hidden;
}
.locked-content .prompt-code, .locked-content .text-blur {
    filter: blur(6px);
    opacity: 0.6;
    pointer-events: none;
}
.locked-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(5, 5, 5, 0.4);
    backdrop-filter: blur(2px);
    z-index: 10;
    border-radius: var(--radius-md);
    text-align: center;
    padding: 24px;
}
.light-theme .locked-overlay {
    background: rgba(255, 255, 255, 0.4);
}
.locked-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
}
.locked-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}
.locked-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    max-width: 320px;
}

/* Floating Checkout CTA (Global) */
.floating-cta {
    position: fixed;
    bottom: 24px;
    left: 24px;
    right: auto;
    padding: 0;
    background: transparent;
    border-top: none;
    z-index: 9999;
    display: block;
    transform: translateY(150px);
    transition: transform 0.3s var(--ease);
}

@keyframes button-pulse {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(0, 123, 255, 0.7); }
    70% { transform: scale(1.05); box-shadow: 0 0 0 15px rgba(0, 123, 255, 0); }
    100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(0, 123, 255, 0); }
}
.floating-cta.visible {
    transform: translateY(0);
}
.floating-cta .btn {
    width: auto;
    padding: 14px 28px;
    border-radius: 50px;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.4);
    animation: button-pulse 2s infinite;
}
@media (max-width: 768px) {
    .floating-cta {
        display: block;
    }
}

/* --- Payment Disclaimer Modal --- */
.payment-modal-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    align-items: center;
    justify-content: center;
    padding: 16px;
}
.payment-modal-backdrop.open {
    display: flex !important;
}

.payment-modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-accent);
    border-radius: 20px;
    max-width: 520px;
    width: 100%;
    padding: 36px 32px;
    position: relative;
    box-shadow: 0 0 60px rgba(0,123,255,0.12), 0 24px 80px rgba(0,0,0,0.8);
    animation: modalIn 0.3s var(--ease);
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.94) translateY(12px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}

.payment-modal-close {
    position: absolute;
    top: 14px;
    right: 16px;
    background: none;
    border: none;
    color: rgba(255,255,255,0.35);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
    transition: color 0.2s;
}
.payment-modal-close:hover {
    color: rgba(255,255,255,0.8);
}

.payment-modal-icon-badge {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    box-shadow: 0 4px 20px rgba(0,123,255,0.35);
}

.payment-modal-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 5px;
    letter-spacing: -0.02em;
}

.payment-modal-subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0 0 22px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    font-weight: 600;
}

.payment-modal-warning-box {
    background: rgba(245,158,11,0.07);
    border: 1px solid rgba(245,158,11,0.3);
    border-radius: 12px;
    padding: 18px 20px;
    margin-bottom: 18px;
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.payment-modal-warning-text {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.payment-modal-warning-text strong {
    color: var(--amber);
}

.payment-modal-alert {
    color: var(--rose);
    font-weight: 700;
    display: block;
    margin-top: 14px;
}

.payment-modal-checklist {
    list-style: none;
    padding: 0;
    margin: 0 0 26px;
    display: flex;
    flex-direction: column;
    gap: 9px;
}

.payment-modal-checklist li {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.payment-modal-checklist li strong {
    color: var(--text-primary);
}

.payment-modal-checklist li strong.alert-text {
    color: var(--rose);
}

.payment-modal-divider {
    height: 1px;
    background: var(--border);
    margin-bottom: 20px;
}

.payment-modal-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.payment-btn-proceed {
    display: block;
    text-align: center;
    background: var(--accent-gradient);
    color: #fff;
    font-weight: 700;
    font-size: 0.95rem;
    padding: 14px 24px;
    border-radius: 12px;
    text-decoration: none;
    letter-spacing: 0.01em;
    box-shadow: 0 4px 20px rgba(0,123,255,0.3);
    transition: all 0.25s var(--ease);
}
.payment-btn-proceed:hover {
    box-shadow: 0 6px 30px rgba(0,123,255,0.5);
    transform: translateY(-2px);
}

.payment-btn-cancel {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.875rem;
    padding: 11px;
    border-radius: 12px;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s var(--ease);
}
.payment-btn-cancel:hover {
    border-color: rgba(0,123,255,0.4);
    color: var(--text-secondary);
}