/* ===== CSS Variables ===== */
:root {
    /* Primary Colors - AIDetector Theme */
    --primary: #FF499E;
    --primary-dark: #e03d8a;
    --secondary: #8322EA;
    --accent: #FF6AB3;

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --text-light: rgba(255, 255, 255, 0.6);

    /* Background Colors */
    --bg-primary: #0a0a0a;
    --bg-secondary: #1A1A1A;
    --bg-tertiary: #2A2A2A;

    /* Border */
    --border: rgba(255, 73, 158, 0.2);

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 64px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===== Navigation ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.nav.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
}

.nav-logo img {
    display: block;
}

.logo-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    font-size: 15px;
}

.nav-links a:hover {
    color: var(--primary);
}

/* ===== Buttons ===== */
.btn-primary,
.btn-secondary,
.btn-primary-small,
.btn-appstore {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 16px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--text-primary);
    box-shadow: 0 4px 16px rgba(255, 73, 158, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 73, 158, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-secondary:hover {
    background: var(--primary);
    color: var(--text-primary);
}

.btn-primary-small {
    padding: 10px 20px;
    font-size: 14px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--text-primary);
}

.btn-appstore {
    background: #000000;
    color: #ffffff;
    padding: 12px 24px;
    font-size: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.btn-appstore:hover {
    background: #1a1a1a;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

/* ===== Hero Section ===== */
.hero {
    padding: 120px 0 80px;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: radial-gradient(circle at 70% 30%, rgba(255, 73, 158, 0.15) 0%, transparent 60%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40%;
    height: 60%;
    background: radial-gradient(circle at 20% 80%, rgba(131, 34, 234, 0.12) 0%, transparent 50%);
    pointer-events: none;
}

.hero .container {
    display: flex;
    flex-direction: column;
    gap: 60px;
    align-items: center;
}

.hero-content {
    animation: fadeInUp 0.8s ease;
    text-align: center;
    max-width: 900px;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255, 73, 158, 0.15);
    color: var(--accent);
    border-radius: 100px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 24px;
    border: 1px solid var(--border);
    justify-content: center;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
    justify-content: center;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeIn 1s ease;
    width: 100%;
    margin: 0 -24px;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.screenshot-placeholder,
.app-logo-placeholder,
.showcase-placeholder {
    background: var(--bg-tertiary);
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    min-height: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.placeholder-note {
    color: var(--text-light);
    font-size: 14px;
    margin-top: var(--spacing-xs);
}

/* Screenshots Container */
.screenshots-container {
    width: 100%;
    max-width: 100%;
    overflow: hidden;
}

.screenshot-track {
    display: flex;
    gap: 16px;
    justify-content: center;
    padding: 0 24px;
    flex-wrap: nowrap;
}

.screenshot-slide {
    flex: 1;
    min-width: 200px;
    max-width: 300px;
    background: #000;
    border-radius: 16px;
    overflow: hidden;
    box-shadow:
        0 20px 60px -10px rgba(255, 73, 158, 0.4),
        0 10px 30px -5px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
}

.screenshot-slide:hover {
    transform: translateY(-8px);
}

.screenshot-slide img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
}

/* ===== Section Headers ===== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-header h2 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.section-header p {
    font-size: 18px;
    color: var(--text-secondary);
}

/* ===== Features Section ===== */
.features {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.feature-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: var(--transition);
    opacity: 0;
    transform: translateY(20px);
}

.feature-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
    box-shadow: 0 8px 24px rgba(255, 73, 158, 0.2);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, rgba(255, 73, 158, 0.2) 0%, rgba(131, 34, 234, 0.2) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
    color: var(--primary);
}

.feature-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.feature-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== Showcase Section ===== */
.showcase {
    padding: var(--spacing-2xl) 0;
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.showcase-item {
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
}

.showcase-item:hover {
    transform: scale(1.03);
    box-shadow: 0 8px 32px rgba(255, 73, 158, 0.3);
}

.showcase-card {
    padding: var(--spacing-lg);
    text-align: center;
}

.showcase-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.showcase-card p {
    color: var(--text-secondary);
    line-height: 1.8;
}

.before-after {
    position: relative;
    width: 100%;
    height: 450px;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.before-image,
.after-image {
    width: 100%;
    height: 50%;
    object-fit: cover;
    display: block;
}

.before-label,
.after-label {
    position: absolute;
    padding: 8px 16px;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(4px);
    color: white;
    font-size: 13px;
    font-weight: 700;
    border-radius: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
    z-index: 10;
}

.before-label {
    bottom: 52%;
    left: 50%;
    transform: translateX(-50%) translateY(50%);
}

.after-label {
    top: 52%;
    left: 50%;
    transform: translateX(-50%) translateY(-50%);
}

/* ===== Benefits Section ===== */
.benefits {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-secondary);
}

.benefits-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.benefits-text h2 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.benefits-list {
    list-style: none;
}

.benefits-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    font-size: 18px;
    color: var(--text-secondary);
}

.benefits-list svg {
    flex-shrink: 0;
    color: var(--primary);
}

.benefits-visual {
    display: flex;
    justify-content: center;
}

.benefits-card {
    background: linear-gradient(135deg, rgba(255, 73, 158, 0.1) 0%, rgba(131, 34, 234, 0.1) 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    width: 100%;
    max-width: 400px;
    min-height: 380px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.benefits-app-logo {
    width: 100%;
    max-width: 280px;
    height: auto;
    aspect-ratio: 1 / 1;
    object-fit: contain;
    border-radius: 60px;
    box-shadow:
        0 20px 60px rgba(255, 73, 158, 0.3),
        0 10px 30px rgba(0, 0, 0, 0.4);
    transition: var(--transition);
    display: block;
}

.benefits-app-logo:hover {
    transform: scale(1.05);
    box-shadow:
        0 30px 80px rgba(255, 73, 158, 0.4),
        0 15px 40px rgba(0, 0, 0, 0.5);
}

.app-logo-placeholder {
    min-height: 300px;
}

/* ===== Download Section ===== */
.download {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    text-align: center;
}

.download-content h2 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.download-content p {
    font-size: 18px;
    color: var(--text-primary);
    opacity: 0.9;
    margin-bottom: var(--spacing-lg);
}

.download-note {
    margin-top: var(--spacing-sm);
    font-size: 14px;
    opacity: 0.8;
}

/* ===== Footer ===== */
.footer {
    padding: var(--spacing-2xl) 0 var(--spacing-md);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: var(--spacing-lg);
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 14px;
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border);
}

.footer-bottom p {
    color: var(--text-light);
    font-size: 14px;
}

/* ===== Animations ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 48px;
    }

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

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

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

@media (max-width: 768px) {
    .nav-links a:not(.btn-primary-small) {
        display: none;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-image {
        margin: 0 -24px;
        width: calc(100% + 48px);
        position: relative;
        left: 0;
        right: 0;
        justify-content: flex-start;
        align-items: flex-start;
    }

    .hero-title {
        font-size: 40px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .hero-cta {
        flex-direction: column;
    }

    .btn-primary, .btn-secondary {
        width: 100%;
        justify-content: center;
    }

    .screenshots-container {
        width: 100%;
        max-width: 100%;
        padding: 0;
        overflow-x: auto;
        overflow-y: hidden;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .screenshots-container::-webkit-scrollbar {
        display: none;
    }

    .screenshot-track {
        justify-content: flex-start;
        scroll-snap-type: x mandatory;
        padding: 0 12px 0 12px;
        gap: 12px;
        width: max-content;
        min-width: 100%;
    }

    .screenshot-track::-webkit-scrollbar {
        display: none;
    }

    .screenshot-slide {
        flex: 0 0 auto;
        min-width: 200px;
        max-width: 250px;
        scroll-snap-align: start;
    }

    .screenshot-slide:hover {
        transform: none;
    }

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

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

    .section-header h2 {
        font-size: 32px;
    }

    .benefits-text h2 {
        font-size: 32px;
    }

    .benefits-list li {
        font-size: 16px;
    }

    .download-content h2 {
        font-size: 32px;
    }

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-lg);
    }

    .footer-links {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .section-header h2 {
        font-size: 28px;
    }

    .btn-primary,
    .btn-secondary,
    .btn-appstore {
        padding: 12px 24px;
        font-size: 14px;
    }

    .hero-image {
        margin: 0 -16px;
        width: calc(100% + 32px);
        position: relative;
        left: 0;
        right: 0;
        justify-content: flex-start;
        align-items: flex-start;
    }

    .screenshots-container {
        width: 100%;
        max-width: 100%;
        padding: 0;
    }

    .screenshot-slide {
        flex: 0 0 auto;
        min-width: 180px;
        max-width: 220px;
    }

    .screenshot-track {
        padding: 0 8px 0 8px;
        gap: 10px;
        min-width: 100%;
    }
}