:root {
    --bitcoin-orange: #f7931a;
    --bg-dark: #000000;
    --card-bg: #111111;
    --border-color: #222222;
    --text-main: #e0e0e0;
    --text-dim: #a0a0a0;
    --mono-font: "Fira Code", "Courier New", monospace;
    --main-font: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.mono {
    font-family: var(--mono-font);
    color: var(--bitcoin-orange);
    margin-bottom: 15px;
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
}

.accent {
    color: var(--bitcoin-orange);
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 2000;
    padding: 10px 14px;
    background: var(--bitcoin-orange);
    color: #000;
    font-weight: 800;
    text-decoration: none;
}

.skip-link:focus {
    left: 16px;
    top: 16px;
}

/* Header */
header {
    position: fixed;
    width: 100%;
    top: 0;
    background: rgba(0, 0, 0, 0.9);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 20px 0;
    backdrop-filter: blur(10px);
}

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

.logo {
    font-size: 26px;
    font-weight: 900;
    color: var(--bitcoin-orange);
    letter-spacing: -1.5px;
    text-decoration: none;
}

.nav-links a {
    color: var(--text-dim);
    margin: 0 15px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}

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

/* Hero */
.hero {
    padding: 180px 0 120px;
    text-align: center;
}

.hero h1 {
    font-size: clamp(42px, 9vw, 84px);
    line-height: 1.05;
    margin: 0 auto 24px;
    font-weight: 900;
    letter-spacing: -2px;
    max-width: 900px;
}

.hero p {
    font-size: 20px;
    color: var(--text-dim);
    max-width: 780px;
    margin: 0 auto 50px;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin: 0 auto 36px;
    max-width: 720px;
    list-style: none;
}

.hero-tags li {
    padding: 6px 14px;
    border: 1px solid var(--border-color);
    border-radius: 999px;
    font-family: var(--mono-font);
    font-size: 0.75rem;
    color: var(--text-dim);
}

.play-store-btn {
    display: inline-block;
    transition: transform 0.2s;
}

.play-store-btn:hover {
    transform: translateY(-3px);
}

.play-store-btn img {
    height: 65px;
    width: auto;
}

/* Intro */
.rec-intro {
    padding: 120px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.rec-intro h2 {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 800;
    margin-bottom: 20px;
}

.rec-intro p {
    color: var(--text-dim);
    max-width: 720px;
    margin: 0 auto 16px;
    font-size: 18px;
}

.rec-intro p:last-child {
    margin-bottom: 0;
}

/* Features */
.feature-item {
    padding: 100px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 80px;
    border-top: 1px solid var(--border-color);
}

.feature-item.reverse {
    flex-direction: row-reverse;
}

.feature-content {
    flex: 1;
    max-width: 550px;
}

.feature-content h3 {
    font-size: 36px;
    font-weight: 800;
    color: var(--bitcoin-orange);
    margin-bottom: 20px;
}

.feature-content p {
    color: var(--text-dim);
    font-size: 18px;
    margin-bottom: 20px;
}

.feature-item .phone-side {
    flex: 0 0 320px;
}

.phone-mockup {
    position: relative;
    max-width: 320px;
    margin: 0 auto;
    border: 12px solid #222;
    border-radius: 36px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.6);
    overflow: hidden;
    background: #000;
}

.phone-mockup::before {
    content: "";
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 140px;
    height: 28px;
    background: #222;
    border-bottom-left-radius: 16px;
    border-bottom-right-radius: 16px;
    z-index: 10;
}

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

ul.structured-list {
    list-style-type: none;
    margin-top: 15px;
}

ul.structured-list li {
    position: relative;
    padding-left: 30px;
    margin-bottom: 12px;
    color: var(--text-main);
    font-size: 16px;
}

ul.structured-list li::before {
    content: "✓";
    color: var(--bitcoin-orange);
    position: absolute;
    left: 0;
    font-weight: bold;
}

/* Premium band */
.premium-band {
    padding: 80px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    background: linear-gradient(180deg, transparent, rgba(247, 147, 26, 0.04));
}

.premium-band h2 {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 16px;
}

.premium-band p {
    color: var(--text-dim);
    max-width: 720px;
    margin: 0 auto 28px;
    font-size: 17px;
}

.chip-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    list-style: none;
}

.chip-row li {
    padding: 8px 16px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-main);
}

/* FAQ */
.faq {
    padding: 100px 0;
    border-top: 1px solid var(--border-color);
}

.faq h2 {
    text-align: center;
    margin-bottom: 20px;
    font-size: 42px;
}

.faq-intro {
    text-align: center;
    color: var(--text-dim);
    max-width: 600px;
    margin: 0 auto 50px;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.faq-item {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: border-color 0.3s;
}

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

.faq-item h4 {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 12px;
    color: var(--text-main);
    font-size: 18px;
    font-weight: 700;
    line-height: 1.3;
}

.faq-icon {
    font-size: 22px;
    flex-shrink: 0;
}

.faq-item p {
    color: var(--text-dim);
    margin-left: 34px;
}

.faq-item a {
    color: var(--bitcoin-orange);
}

.faq-more {
    text-align: center;
    margin-top: 40px;
}

.faq-more a {
    color: var(--bitcoin-orange);
    font-weight: 700;
    text-decoration: none;
}

.faq-more a:hover {
    text-decoration: underline;
}

/* Footer */
footer {
    padding: 80px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

footer .logo {
    margin-bottom: 30px;
    display: inline-block;
}

footer p {
    font-size: 14px;
    color: var(--text-dim);
    margin-bottom: 30px;
}

.footer-links a {
    color: var(--text-dim);
    margin: 0 12px;
    text-decoration: none;
    font-size: 14px;
}

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

/* Inner pages */
.page-hero {
    padding: 140px 0 60px;
    text-align: center;
}

.page-hero h1 {
    font-size: clamp(36px, 6vw, 56px);
    font-weight: 900;
    margin-bottom: 16px;
}

.page-hero p {
    color: var(--text-dim);
    max-width: 640px;
    margin: 0 auto;
    font-size: 18px;
}

.install-steps {
    max-width: 640px;
    margin: 40px auto 0;
    padding: 0;
    list-style: none;
    text-align: left;
}

.install-steps li {
    padding: 20px 24px;
    margin-bottom: 12px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
}

.install-steps strong {
    display: block;
    color: var(--bitcoin-orange);
    margin-bottom: 6px;
}

@media (max-width: 768px) {
    header {
        position: relative;
        padding: 20px 0;
    }

    .nav-links {
        display: none;
    }

    header .container {
        justify-content: center;
    }

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

    .hero h1 {
        letter-spacing: -1px;
    }

    .feature-item,
    .feature-item.reverse {
        flex-direction: column;
        text-align: center;
        gap: 50px;
    }

    .feature-content {
        max-width: 100%;
    }

    ul.structured-list li {
        text-align: left;
    }

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

    .faq-item p {
        margin-left: 0;
        margin-top: 10px;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .play-store-btn:hover {
        transform: none;
    }
}