:root {
    --bg: #f5f5f7;
    --surface: #ffffff;
    --surface2: #f0f0f4;
    --text: #1d1d1f;
    --text2: #86868b;
    --text3: #aeaeb2;
    --blue: #0071e3;
    --blue-light: #e8f0fe;
    --blue-dark: #0059b3;
    --green: #34c759;
    --green-light: #e8f8ec;
    --purple: #af52de;
    --purple-light: #f3edfc;
    --pink: #ff375f;
    --pink-light: #fdf0f5;
    --nav-bg: rgba(255,255,255,0.72);
    --nav-border: rgba(0,0,0,0.08);
    --card-border: rgba(0,0,0,0.06);
    --card-hover: rgba(0,0,0,0.12);
    --card-shadow: 0 2px 10px rgba(0,0,0,0.03);
    --divider: rgba(0,0,0,0.06);
    --radius: 22px;
    --radius-sm: 14px;
    --max-width: 980px;
    --nav-height: 48px;
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #1c1c1e;
        --surface: #2c2c2e;
        --surface2: #3a3a3c;
        --text: #f5f5f7;
        --text2: #98989d;
        --text3: #636366;
        --blue: #0a84ff;
        --blue-light: #1a2a3a;
        --blue-dark: #409cff;
        --green: #30d158;
        --green-light: #1a3a2a;
        --purple: #bf5af2;
        --purple-light: #2a1a3a;
        --pink: #ff375f;
        --pink-light: #3a1a2a;
        --nav-bg: rgba(28,28,30,0.72);
        --nav-border: rgba(255,255,255,0.08);
        --card-border: rgba(255,255,255,0.06);
        --card-hover: rgba(255,255,255,0.1);
        --card-shadow: 0 2px 10px rgba(0,0,0,0.2);
        --divider: rgba(255,255,255,0.06);
    }
}
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body {
    background: var(--bg); color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', sans-serif;
    line-height: 1.47; letter-spacing: -0.01em; overflow-x: hidden;
    font-size: 17px;
}

.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; }
.nav-inner { max-width: var(--max-width); margin: 12px auto 0; padding: 0 20px; display: flex; align-items: center; justify-content: space-between; height: var(--nav-height); background: var(--nav-bg); backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px); border-radius: var(--nav-height); border: 0.5px solid var(--nav-border); box-shadow: 0 1px 3px rgba(0,0,0,0.04); }
.nav-logo { font-size: 15px; font-weight: 700; color: var(--text); text-decoration: none; letter-spacing: -0.2px; margin-left: 14px; }
.nav-links { display: flex; align-items: center; gap: 2px; margin-right: 4px; }
.nav-links a { padding: 6px 14px; border-radius: 20px; font-size: 13px; font-weight: 500; color: var(--text2); text-decoration: none; transition: all 0.15s; }
.nav-links a:hover { background: rgba(128,128,128,0.1); color: var(--text); }
.nav-links a.active { background: rgba(128,128,128,0.15); color: var(--text); }
.nav-links a.nsfw-link { background: var(--pink); color: #fff; font-weight: 600; }
.nav-links a.nsfw-link:hover { background: #e0304f; }
.burger { display: none; }
@media (max-width: 768px) {
    .nav-inner { margin: 8px 12px 0; border-radius: 24px; }
    .burger { display: flex; flex-direction: column; gap: 4px; background: none; border: none; cursor: pointer; padding: 6px; margin-right: 6px; }
    .burger span { display: block; width: 18px; height: 1.5px; background: var(--text); border-radius: 1px; transition: all 0.25s; }
    .burger.open span:nth-child(1) { transform: rotate(45deg) translate(3.5px,3.5px); }
    .burger.open span:nth-child(2) { opacity: 0; }
    .burger.open span:nth-child(3) { transform: rotate(-45deg) translate(3.5px,-3.5px); }
    .nav-links { display: none; position: fixed; top: 72px; left: 12px; right: 12px; flex-direction: column; background: var(--surface); border-radius: 20px; padding: 8px; gap: 1px; border: 0.5px solid var(--nav-border); box-shadow: 0 4px 24px rgba(0,0,0,0.15); }
    .nav-links.open { display: flex; }
    .nav-links a { padding: 12px 16px; border-radius: 14px; font-size: 15px; }
}

.hero { padding: 160px 24px 80px; text-align: center; }
.hero-inner { max-width: 560px; margin: 0 auto; }
.hero-badge { display: inline-block; padding: 4px 12px; border-radius: 16px; background: var(--blue-light); color: var(--blue); font-size: 11px; font-weight: 600; letter-spacing: 0.2px; margin-bottom: 18px; }
.hero h1 { font-size: clamp(48px, 7vw, 72px); font-weight: 700; letter-spacing: -2px; color: var(--text); line-height: 1.06; margin-bottom: 14px; }
.hero h1 .gradient-text { background: linear-gradient(135deg, #0071e3, #af52de, #ff375f); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
@media (prefers-color-scheme: dark) {
    .hero h1 .gradient-text { background: linear-gradient(135deg, #0a84ff, #bf5af2, #ff375f); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
}
.hero p { font-size: 17px; color: var(--text2); margin-bottom: 32px; line-height: 1.5; max-width: 440px; margin-left: auto; margin-right: auto; font-weight: 400; }
.hero-buttons { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.btn { padding: 12px 24px; border-radius: 24px; font-weight: 600; font-size: 14px; text-decoration: none; transition: all 0.2s; display: inline-flex; align-items: center; gap: 5px; }
.btn-blue { background: var(--blue); color: #fff; }
.btn-blue:hover { background: var(--blue-dark); }
.btn-outline { background: var(--surface); color: var(--blue); border: 0.5px solid var(--card-border); }
.btn-outline:hover { background: var(--blue-light); border-color: var(--blue); }
.btn-pink { background: var(--pink); color: #fff; }
.btn-pink:hover { background: #e0304f; }

.section { max-width: var(--max-width); margin: 0 auto; padding: 64px 24px; }
.section-header { margin-bottom: 36px; }
.section-tag { display: inline-flex; align-items: center; gap: 5px; padding: 3px 10px; border-radius: 7px; font-size: 10px; font-weight: 600; letter-spacing: 0.2px; text-transform: uppercase; margin-bottom: 12px; }
.tag-blue { background: var(--blue-light); color: var(--blue); }
.tag-purple { background: var(--purple-light); color: var(--purple); }
.tag-pink { background: var(--pink-light); color: var(--pink); }
.section h2 { font-size: clamp(32px, 4vw, 44px); font-weight: 700; letter-spacing: -0.8px; margin-bottom: 6px; }
.section h3 { font-size: 16px; color: var(--text2); font-weight: 400; max-width: 480px; line-height: 1.5; }
.section-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 768px) { .section-grid { grid-template-columns: 1fr; } }

.card { background: var(--surface); border-radius: var(--radius); padding: 26px; border: 0.5px solid var(--card-border); transition: all 0.2s; }
.card:hover { border-color: var(--card-hover); box-shadow: var(--card-shadow); }
.card-icon { width: 36px; height: 36px; border-radius: 10px; margin-bottom: 12px; display: flex; align-items: center; justify-content: center; font-size: 18px; font-weight: 500; }
.card-icon.blue { background: var(--blue-light); color: var(--blue); }
.card-icon.purple { background: var(--purple-light); color: var(--purple); }
.card-icon.pink { background: var(--pink-light); color: var(--pink); }
.card h4 { font-size: 15px; font-weight: 600; margin-bottom: 7px; letter-spacing: -0.2px; }
.card p { font-size: 13px; color: var(--text2); line-height: 1.55; }
.card ul { margin: 8px 0 0 18px; font-size: 13px; color: var(--text2); }
.card ul li { margin-bottom: 4px; }
.card ul li::marker { color: var(--blue); }

.tech-stack { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 12px; }
.tech-stack span { font-size: 10px; padding: 3px 7px; border-radius: 5px; background: var(--surface2); color: var(--text3); font-weight: 500; }

.metrics { display: grid; grid-template-columns: repeat(3,1fr); gap: 8px; margin-top: 16px; }
.metric { text-align: center; padding: 12px 4px; background: var(--surface2); border-radius: 12px; }
.metric-value { font-size: 22px; font-weight: 700; letter-spacing: -0.3px; }
.metric-label { font-size: 9px; color: var(--text3); text-transform: uppercase; letter-spacing: 0.2px; margin-top: 2px; }
.metric.blue .metric-value { color: var(--blue); }
.metric.green .metric-value { color: var(--green); }
.metric.purple .metric-value { color: var(--purple); }

.section-cta { margin-top: 24px; }
.age-badge { display: inline-block; background: var(--pink-light); color: var(--pink); font-size: 9px; padding: 2px 7px; border-radius: 5px; margin-left: 5px; font-weight: 600; vertical-align: middle; }

.section-divider { max-width: var(--max-width); margin: 0 auto; border: none; border-top: 0.5px solid var(--divider); }

.footer { text-align: center; padding: 36px 24px; color: var(--text3); font-size: 11px; background: var(--surface); border-top: 0.5px solid var(--divider); }
.footer .pink-note { color: var(--pink); font-size: 10px; margin-top: 3px; }

/* Footer bar */
.footer-bar { max-width: var(--max-width); margin: 0 auto; padding: 0 20px 20px; }
.footer-bar-inner { background: var(--nav-bg); backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px); border-radius: 24px; border: 0.5px solid var(--nav-border); padding: 18px 24px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; box-shadow: 0 1px 3px rgba(0,0,0,0.04); }
.footer-bar-inner .copyright { font-size: 12px; color: var(--text3); }
.footer-bar-inner .links { display: flex; gap: 14px; flex-wrap: wrap; }
.footer-bar-inner .links a { font-size: 12px; color: var(--text2); text-decoration: none; transition: color 0.15s; }
.footer-bar-inner .links a:hover { color: var(--text); }
.footer-bar-inner .links .nsfw-tag { font-size: 10px; color: var(--pink); }