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

:root {
    --primary: #4A3AFF;
    --primary-dark: #3A2AD4;
    --primary-light: #6C5CE7;
    --accent: #00C9A7;
    --bg: #FAFBFF;
    --bg-dark: #0F0E2E;
    --text: #1A1A2E;
    --text-light: #6B7280;
    --text-white: #FFFFFF;
    --card-bg: #FFFFFF;
    --border: #E5E7EB;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 20px 40px -12px rgba(74, 58, 255, 0.15);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    --radius: 16px;
    --radius-sm: 10px;
    --radius-full: 9999px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: rgba(250, 251, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    padding: 10px 0;
    border-bottom-color: var(--border);
    box-shadow: var(--shadow);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text);
}

.logo-img {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    object-fit: cover;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-light);
    transition: var(--transition);
    position: relative;
}

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

.nav-contact-btn {
    background: var(--primary);
    color: var(--text-white) !important;
    padding: 10px 22px;
    border-radius: var(--radius-full);
    font-weight: 600 !important;
    transition: var(--transition);
}

.nav-contact-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

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

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

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(74, 58, 255, 0.08) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(108, 92, 231, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 60% 80%, rgba(0, 201, 167, 0.05) 0%, transparent 50%);
    z-index: 0;
}

.hero-container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    background: rgba(74, 58, 255, 0.08);
    color: var(--primary);
    padding: 8px 20px;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
    border: 1px solid rgba(74, 58, 255, 0.12);
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 50%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-light);
    max-width: 520px;
    margin-bottom: 36px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.store-badge img {
    height: 48px;
    width: auto;
    transition: var(--transition);
}

.store-badge:hover img {
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 28px;
}

.stat {
    text-align: center;
}

.stat strong {
    display: block;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
}

.stat span {
    font-size: 0.8rem;
    color: var(--text-light);
    font-weight: 500;
}

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

.hero-image {
    display: flex;
    justify-content: center;
}

.phone-mockup {
    position: relative;
    width: 280px;
    border-radius: 36px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 8px solid #1A1A2E;
    background: #1A1A2E;
}

.phone-mockup img {
    width: 100%;
    display: block;
}

.hero-slideshow {
    position: relative;
    width: 100%;
    overflow: hidden;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    opacity: 0;
    filter: blur(8px);
    transition: opacity 0.8s ease, filter 0.8s ease;
}

.hero-slide:first-child {
    position: relative;
}

.hero-slide.active {
    opacity: 1;
    filter: blur(0);
    z-index: 1;
}

/* ===== Sections Common ===== */
.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 60px;
}

.section-tag {
    display: inline-block;
    background: rgba(74, 58, 255, 0.08);
    color: var(--primary);
    padding: 6px 18px;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
    border: 1px solid rgba(74, 58, 255, 0.12);
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
    line-height: 1.15;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-light);
}

/* ===== Features ===== */
.features {
    padding: 100px 0;
}

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

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 24px;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(74, 58, 255, 0.2);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.feature-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== Screenshots ===== */
.screenshots {
    padding: 100px 0;
    background: var(--bg-dark);
    overflow: hidden;
}

.screenshots .section-tag {
    background: rgba(255, 255, 255, 0.1);
    color: var(--accent);
    border-color: rgba(255, 255, 255, 0.1);
}

.screenshots .section-header h2 {
    color: var(--text-white);
}

.screenshots .section-header p {
    color: rgba(255, 255, 255, 0.6);
}

.screenshots-carousel {
    position: relative;
    padding: 0 60px;
}

.screenshots-track {
    display: flex;
    gap: 24px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding: 20px 0;
}

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

.screenshot-item {
    flex: 0 0 220px;
    scroll-snap-align: center;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    transition: var(--transition);
    border: 4px solid rgba(255, 255, 255, 0.1);
}

.screenshot-item:hover {
    transform: scale(1.05);
    border-color: rgba(74, 58, 255, 0.5);
}

.screenshot-item img {
    width: 100%;
    height: auto;
    display: block;
}

.carousel-controls {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    pointer-events: none;
}

.carousel-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    pointer-events: all;
    transition: var(--transition);
}

.carousel-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
}

.carousel-btn svg {
    width: 20px;
    height: 20px;
}

/* ===== Research ===== */
.research {
    padding: 100px 0;
}

.research-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.research-content .section-tag {
    margin-bottom: 16px;
}

.research-content h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
    line-height: 1.15;
}

.research-content > p {
    font-size: 1.05rem;
    color: var(--text-light);
    margin-bottom: 32px;
    line-height: 1.7;
}

.research-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.research-list li {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    font-size: 0.95rem;
    color: var(--text);
    line-height: 1.5;
}

.research-list svg {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    color: var(--accent);
    margin-top: 1px;
}

.research-image {
    display: flex;
    justify-content: center;
}

/* ===== Audience ===== */
.audience {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--bg) 0%, rgba(74, 58, 255, 0.03) 100%);
}

.audience-grid {
    display: grid;
    grid-template-columns: repeat(3, 280px);
    gap: 24px;
    justify-content: center;
}

.audience-card {
    text-align: center;
    padding: 40px 24px;
    border-radius: var(--radius);
    background: var(--card-bg);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.audience-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(74, 58, 255, 0.2);
}

.audience-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.audience-icon svg {
    width: 28px;
    height: 28px;
    color: white;
}

.audience-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.audience-card p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== Download CTA ===== */
.download {
    padding: 100px 0;
}

.download-card {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 50%, #8B5CF6 100%);
    border-radius: 24px;
    padding: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
    position: relative;
    overflow: hidden;
}

.download-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.08) 0%, transparent 50%);
}

.download-content {
    position: relative;
    z-index: 1;
}

.download-content h2 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-white);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.download-content > p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 32px;
    max-width: 450px;
}

.download-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
}

.download-note {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}

.download-image {
    position: relative;
    z-index: 1;
    flex-shrink: 0;
}

.download-app-icon {
    width: 180px;
    height: 180px;
    border-radius: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-dark);
    padding: 60px 0 30px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--text-white);
    margin-bottom: 12px;
}

.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.6;
    max-width: 300px;
}

.footer-links h4 {
    color: var(--text-white);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    font-size: 0.9rem;
    transition: var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    text-align: center;
    font-size: 0.85rem;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero h1 {
        font-size: 2.8rem;
    }

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

    .download-card {
        padding: 60px;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--card-bg);
        flex-direction: column;
        padding: 80px 32px 32px;
        gap: 24px;
        box-shadow: var(--shadow-xl);
        transition: var(--transition);
        z-index: 999;
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links a {
        font-size: 1rem;
    }

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

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero {
        padding: 100px 0 60px;
        min-height: auto;
    }

    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .hero-subtitle {
        margin: 0 auto 32px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-image {
        order: -1;
    }

    .phone-mockup {
        width: 220px;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .research-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .research-content h2 {
        font-size: 2rem;
    }

    .research-image {
        order: -1;
    }

    .download-card {
        flex-direction: column;
        padding: 48px 32px;
        text-align: center;
    }

    .download-content > p {
        margin: 0 auto 32px;
    }

    .download-buttons {
        justify-content: center;
    }

    .screenshots-carousel {
        padding: 0 20px;
    }

    .screenshot-item {
        flex: 0 0 180px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-brand p {
        max-width: none;
    }

    .footer-logo {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.8rem;
    }

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

    .hero-stats {
        flex-direction: column;
        gap: 16px;
    }

    .stat-divider {
        width: 40px;
        height: 1px;
    }

    .store-badge img {
        height: 40px;
    }

    .download-card {
        padding: 36px 24px;
    }

    .download-content h2 {
        font-size: 1.8rem;
    }
}

/* ===== Privacy Policy Page ===== */
.privacy-policy {
    padding: 120px 0 80px;
    min-height: 100vh;
}

.policy-content {
    max-width: 780px;
    margin: 0 auto;
}

.policy-content h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 32px;
    letter-spacing: -0.02em;
}

.policy-content h2 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-top: 36px;
    margin-bottom: 12px;
}

.policy-content p {
    font-size: 1rem;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 16px;
}

.policy-content a {
    color: var(--primary);
    text-decoration: underline;
    transition: var(--transition);
}

.policy-content a:hover {
    color: var(--primary-dark);
}