/* ── Reset & Base ────────────────────────────────── */

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

:root {
    --bg: #0a0a0f;
    --surface: #12121a;
    --border: rgba(255, 255, 255, 0.06);
    --text: #e8e8ec;
    --text-dim: #8a8a9a;
    --accent: #6e5cff;
    --accent-glow: rgba(110, 92, 255, 0.4);
    --portal: rgba(110, 92, 255, 0.08);
    --card-bg: rgba(18, 18, 28, 0.7);
    --font: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', system-ui, sans-serif;
}

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

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    overflow-x: hidden;
    line-height: 1.6;
}

/* ── Animated Background ────────────────────────── */

.parallax-bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.grid-plane {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(110, 92, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(110, 92, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 20%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 20%, transparent 70%);
    animation: grid-drift 20s linear infinite;
}

@keyframes grid-drift {
    0%   { background-position: 0 0; }
    100% { background-position: 60px 60px; }
}

.particle {
    position: absolute;
    left: var(--x);
    top: var(--y);
    width: var(--size);
    height: var(--size);
    background: var(--accent);
    border-radius: 50%;
    opacity: 0;
    animation: particle-float 6s ease-in-out var(--delay) infinite;
    box-shadow: 0 0 8px var(--accent-glow);
}

@keyframes particle-float {
    0%, 100% { opacity: 0; transform: translateY(0) scale(1); }
    20%      { opacity: 0.7; }
    50%      { opacity: 0.4; transform: translateY(-40px) scale(1.3); }
    80%      { opacity: 0.6; }
}

/* ── Portal Ring ────────────────────────────────── */

.portal-ring {
    position: fixed;
    top: 38%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    border-radius: 50%;
    border: 1px solid rgba(110, 92, 255, 0.1);
    box-shadow:
        0 0 80px rgba(110, 92, 255, 0.06),
        inset 0 0 80px rgba(110, 92, 255, 0.04);
    pointer-events: none;
    z-index: 0;
    transition: transform 0.3s ease-out;
    animation: portal-pulse 4s ease-in-out infinite;
}

@keyframes portal-pulse {
    0%, 100% { opacity: 0.4; }
    50%      { opacity: 0.7; }
}

/* ── Main ───────────────────────────────────────── */

main {
    position: relative;
    z-index: 1;
    max-width: 920px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ── Hero ───────────────────────────────────────── */

.hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 120px 0 80px;
    min-height: 100vh;
    justify-content: center;
}

.app-icon-wrapper {
    position: relative;
    margin-bottom: 32px;
}

.icon-glow {
    position: absolute;
    inset: -20px;
    border-radius: 28%;
    background: var(--accent-glow);
    filter: blur(40px);
    opacity: 0.5;
    animation: icon-breathe 3s ease-in-out infinite;
}

@keyframes icon-breathe {
    0%, 100% { opacity: 0.4; transform: scale(1); }
    50%      { opacity: 0.65; transform: scale(1.05); }
}

.app-icon {
    width: 140px;
    height: 140px;
    border-radius: 28%;
    position: relative;
    z-index: 1;
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(255, 255, 255, 0.08);
}

.app-title {
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.05;
    margin-bottom: 12px;
}

.title-word {
    display: inline-block;
}

.title-word.accent {
    background: linear-gradient(135deg, #6e5cff 0%, #a78bfa 50%, #6e5cff 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-shift 4s ease-in-out infinite;
}

@keyframes gradient-shift {
    0%, 100% { background-position: 0% center; }
    50%      { background-position: 100% center; }
}

.tagline {
    font-size: 1.25rem;
    color: var(--accent);
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 20px;
}

.subtitle {
    font-size: 1.15rem;
    color: var(--text-dim);
    max-width: 520px;
    margin-bottom: 40px;
    line-height: 1.7;
}

/* ── Download Button ────────────────────────────── */

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 14px 28px;
    background: #fff;
    color: #000;
    border-radius: 14px;
    text-decoration: none;
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(255, 255, 255, 0.15);
}

.apple-logo {
    width: 22px;
    height: 26px;
}

.btn-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.2;
}

.btn-small {
    font-size: 0.65rem;
    letter-spacing: 0.02em;
}

.btn-large {
    font-size: 1.25rem;
    font-weight: 700;
}

/* ── Section Titles ─────────────────────────────── */

.section-title {
    text-align: center;
    font-size: clamp(1.6rem, 4vw, 2.4rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 48px;
}

/* ── Features ───────────────────────────────────── */

.features {
    padding: 80px 0;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.feature-card {
    position: relative;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 36px 28px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
    transform-style: preserve-3d;
    will-change: transform;
    overflow: hidden;
}

.card-depth-layer {
    position: absolute;
    inset: 0;
    border-radius: 20px;
    background: radial-gradient(circle at 50% 0%, var(--portal), transparent 60%);
    opacity: 0;
    transition: opacity 0.4s;
}

.feature-card:hover .card-depth-layer {
    opacity: 1;
}

.feature-card:hover {
    box-shadow: 0 16px 48px rgba(110, 92, 255, 0.1);
}

.feature-icon {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--text-dim);
    line-height: 1.65;
}

/* ── How It Works ───────────────────────────────── */

.how-it-works {
    padding: 80px 0;
}

.steps {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
}

.step {
    display: flex;
    align-items: flex-start;
    gap: 24px;
    max-width: 480px;
    width: 100%;
}

.step-number {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    font-weight: 700;
    font-size: 1.1rem;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.step-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.step-content p {
    font-size: 0.95rem;
    color: var(--text-dim);
    line-height: 1.6;
}

.step-connector {
    width: 2px;
    height: 32px;
    background: linear-gradient(to bottom, var(--accent), transparent);
    margin-left: 21px;
    opacity: 0.4;
}

/* ── Tech ───────────────────────────────────────── */

.tech {
    padding: 80px 0;
}

.tech-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}

.tech-pill {
    padding: 10px 22px;
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-dim);
    background: var(--card-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: color 0.3s, border-color 0.3s;
}

.tech-pill:hover {
    color: var(--accent);
    border-color: var(--accent);
}

/* ── Requirements ───────────────────────────────── */

.requirements {
    text-align: center;
    padding: 40px 0 80px;
}

.requirements p {
    font-size: 0.9rem;
    color: var(--text-dim);
}

/* ── Footer ─────────────────────────────────────── */

footer {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 40px 24px;
    border-top: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 0.85rem;
}

/* ── Responsive ─────────────────────────────────── */

@media (max-width: 640px) {
    .hero {
        padding: 80px 0 60px;
    }

    .app-icon {
        width: 110px;
        height: 110px;
    }

    .portal-ring {
        width: 350px;
        height: 350px;
    }

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

    .step {
        gap: 16px;
    }
}