/* ========== CSS Variables & Reset ========== */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #16161f;
    --bg-card-hover: #1c1c28;
    --text-primary: #f0f0f5;
    --text-secondary: #a0a0b8;
    --text-muted: #6b6b82;
    --accent-primary: #6c5ce7;
    --accent-secondary: #a29bfe;
    --accent-gradient: linear-gradient(135deg, #6c5ce7, #a29bfe, #fd79a8);
    --accent-glow: rgba(108, 92, 231, 0.3);
    --border-color: rgba(255, 255, 255, 0.06);
    --border-highlight: rgba(108, 92, 231, 0.3);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 60px rgba(108, 92, 231, 0.15);
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

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

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

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

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

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-header h2 {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 560px;
    margin: 0 auto;
}

.section-badge {
    display: inline-block;
    background: rgba(108, 92, 231, 0.12);
    color: var(--accent-secondary);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: 20px;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: var(--transition);
    font-family: inherit;
    text-align: center;
    justify-content: center;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(108, 92, 231, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1.5px solid var(--border-highlight);
}

.btn-outline:hover {
    background: rgba(108, 92, 231, 0.1);
    border-color: var(--accent-primary);
}

.btn-lg {
    padding: 14px 28px;
    font-size: 0.95rem;
}

.btn-xl {
    padding: 18px 36px;
    font-size: 1.05rem;
    border-radius: var(--radius-lg);
}

/* ========== Navbar ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 10px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 800;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--accent-gradient);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
}

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

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

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

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

.nav-cta {
    background: var(--accent-gradient);
    color: white;
    padding: 10px 22px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.85rem;
    transition: var(--transition);
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px var(--accent-glow);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

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

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

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

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

.hero-bg-effects {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.4;
}

.hero-glow-1 {
    width: 600px;
    height: 600px;
    background: rgba(108, 92, 231, 0.2);
    top: -200px;
    right: -100px;
}

.hero-glow-2 {
    width: 400px;
    height: 400px;
    background: rgba(253, 121, 168, 0.12);
    bottom: -100px;
    left: -100px;
}

.hero-glow-3 {
    width: 300px;
    height: 300px;
    background: rgba(162, 155, 254, 0.1);
    top: 50%;
    left: 40%;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 0.85fr;
    gap: 60px;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    background: rgba(108, 92, 231, 0.1);
    border: 1px solid var(--border-highlight);
    color: var(--accent-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 8px 20px;
    border-radius: 50px;
    margin-bottom: 24px;
}

.hero-content h1 {
    font-size: clamp(2.2rem, 4.5vw, 3.5rem);
    font-weight: 900;
    line-height: 1.12;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
}

.hero-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.7;
    max-width: 520px;
    margin-bottom: 32px;
}

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

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

.stat-value {
    display: block;
    font-size: 1.5rem;
    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: 0.05em;
}

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

/* Phone Mockup */
.hero-visual {
    display: flex;
    justify-content: center;
}

.phone-mockup {
    perspective: 1000px;
}

.phone-frame {
    width: 280px;
    height: 580px;
    background: #1a1a2e;
    border-radius: 40px;
    padding: 12px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    box-shadow:
        0 40px 80px rgba(0, 0, 0, 0.5),
        0 0 60px rgba(108, 92, 231, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
    transform: rotateY(-8deg) rotateX(4deg);
    transition: transform 0.6s ease;
}

.phone-frame:hover {
    transform: rotateY(0deg) rotateX(0deg);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #0f0c29, #1a1a2e);
    border-radius: 30px;
    overflow: hidden;
    position: relative;
}

.phone-notch {
    width: 120px;
    height: 28px;
    background: #0a0a0f;
    border-radius: 0 0 16px 16px;
    margin: 0 auto;
}

.phone-content {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.phone-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.phone-app-name {
    font-weight: 700;
    font-size: 1rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.phone-search {
    font-size: 1.1rem;
}

.phone-featured {
    background: linear-gradient(135deg, var(--accent-primary), #fd79a8);
    border-radius: var(--radius-md);
    padding: 32px 16px;
    text-align: center;
}

.phone-featured-label {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    opacity: 0.8;
    margin-bottom: 4px;
}

.phone-featured-title {
    font-size: 1.2rem;
    font-weight: 800;
}

.phone-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.phone-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
    height: 110px;
    border: 1px solid rgba(255, 255, 255, 0.04);
}

.phone-card:nth-child(1) { background: linear-gradient(135deg, rgba(108,92,231,0.2), rgba(108,92,231,0.05)); }
.phone-card:nth-child(2) { background: linear-gradient(135deg, rgba(253,121,168,0.2), rgba(253,121,168,0.05)); }
.phone-card:nth-child(3) { background: linear-gradient(135deg, rgba(0,206,209,0.2), rgba(0,206,209,0.05)); }
.phone-card:nth-child(4) { background: linear-gradient(135deg, rgba(255,165,0,0.2), rgba(255,165,0,0.05)); }

.phone-nav-bar {
    display: flex;
    justify-content: space-around;
    padding: 10px 0 4px;
    font-size: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    margin-top: auto;
}

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

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

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

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

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

.feature-card:hover::before {
    opacity: 1;
}

.feature-card-highlight {
    border-color: var(--border-highlight);
    background: rgba(108, 92, 231, 0.05);
}

.feature-card-highlight::before {
    opacity: 1;
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

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

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

.download-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 60px;
    overflow: hidden;
}

.download-glow {
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(108, 92, 231, 0.12), transparent 70%);
    top: -200px;
    right: -200px;
    pointer-events: none;
}

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

.info-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 36px;
}

.info-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.info-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.info-value {
    font-size: 0.95rem;
    font-weight: 600;
}

.download-btn {
    width: 100%;
    max-width: 420px;
    margin: 0 auto;
    display: flex;
}

/* ========== How To Install ========== */
.how-to {
    padding: 100px 0;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.step-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
    position: relative;
}

.step-card:hover {
    border-color: var(--border-highlight);
    transform: translateY(-4px);
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--accent-gradient);
    border-radius: 50%;
    font-size: 1.2rem;
    font-weight: 800;
    margin-bottom: 20px;
}

.step-card h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.step-card p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.5;
}

/* ========== What's New ========== */
.whats-new {
    padding: 100px 0;
}

.changelog-grid {
    max-width: 640px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.changelog-item {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px 24px;
    font-size: 0.95rem;
    transition: var(--transition);
}

.changelog-item:hover {
    border-color: var(--border-highlight);
}

.changelog-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-gradient);
    flex-shrink: 0;
}

/* ========== Reviews ========== */
.reviews {
    padding: 100px 0;
}

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

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

.review-card:hover {
    border-color: var(--border-highlight);
    transform: translateY(-4px);
}

.review-stars {
    color: #ffc107;
    font-size: 1.1rem;
    margin-bottom: 16px;
    letter-spacing: 2px;
}

.review-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 24px;
    font-style: italic;
}

.review-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.review-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
}

.review-author strong {
    display: block;
    font-size: 0.9rem;
}

.review-author span {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ========== FAQ ========== */
.faq {
    padding: 100px 0;
}

.faq-list {
    max-width: 720px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--border-highlight);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    text-align: left;
}

.faq-toggle {
    font-size: 1.3rem;
    color: var(--accent-secondary);
    transition: var(--transition);
    flex-shrink: 0;
    margin-left: 16px;
}

.faq-item.open .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
}

.faq-item.open .faq-answer {
    max-height: 200px;
}

.faq-answer p {
    padding: 0 24px 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ========== CTA ========== */
.cta {
    padding: 60px 0 100px;
}

.cta-card {
    text-align: center;
    background: var(--bg-card);
    border: 1px solid var(--border-highlight);
    border-radius: var(--radius-xl);
    padding: 80px 40px;
    position: relative;
    overflow: hidden;
}

.cta-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(108, 92, 231, 0.08), transparent 70%);
    pointer-events: none;
}

.cta-card h2 {
    font-size: clamp(1.6rem, 3.5vw, 2.4rem);
    font-weight: 800;
    margin-bottom: 12px;
    position: relative;
}

.cta-card p {
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-size: 1.05rem;
    position: relative;
}

.cta-card .btn {
    position: relative;
}

/* ========== Footer ========== */
.footer {
    padding: 60px 0 0;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 60px;
    padding-bottom: 40px;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 16px;
    max-width: 360px;
    line-height: 1.6;
}

.footer-links {
    display: flex;
    gap: 60px;
}

.footer-col h4 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.footer-col a {
    display: block;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 10px;
    transition: var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding: 20px 0;
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.footer-bottom a {
    color: var(--accent-secondary);
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

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

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

    .hero-visual {
        display: none;
    }

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

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

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

    .reviews-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(10, 10, 15, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 20px;
        border-bottom: 1px solid var(--border-color);
    }

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

    .nav-cta {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero {
        min-height: auto;
        padding: 120px 0 60px;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

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

    .download-card {
        padding: 32px 20px;
    }

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

    .steps-grid {
        grid-template-columns: 1fr;
        max-width: 380px;
        margin: 0 auto;
    }

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

    .cta-card {
        padding: 48px 24px;
    }

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

    .stat-divider {
        display: none;
    }
}