*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --bg: #0D1117; --surface: #161B22; --surface2: #1C2128; --border: #21262D; --border2: #30363D;
    --text: #E6EDF3; --muted: #8B949E; --dim: #484F58;
    --green: #238636; --green-bright: #2EA043; --green-glow: #7EE787;
    --blue: #58A6FF; --purple: #BC8CFF; --orange: #D29922; --red: #DA3633;
    --accent: #6366F1; --accent-bright: #818CF8; --accent-glow: #A5B4FC;
    --radius: 12px; --radius-sm: 8px;
}
html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif; background: var(--bg); color: var(--text); line-height: 1.6; }
a { color: var(--blue); text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent-glow); }
img { max-width: 100%; }

/* ════════ NAV ════════ */
nav { position: sticky; top: 0; z-index: 100; background: rgba(13,17,23,.92); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid var(--border); }
.nav-inner { max-width: 1200px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; height: 56px; }
.nav-brand { font-size: 17px; font-weight: 700; color: var(--text); display: flex; align-items: center; gap: 10px; white-space: nowrap; }
.nav-brand:hover { color: var(--text); }
.nav-brand .badge { background: var(--accent); color: #fff; font-size: 10px; font-weight: 800; padding: 3px 8px; border-radius: 5px; letter-spacing: .5px; }
.nav-links { display: flex; gap: 6px; align-items: center; }
.nav-links a { color: var(--muted); font-size: 13px; font-weight: 500; padding: 6px 12px; border-radius: 6px; transition: all .2s; white-space: nowrap; }
.nav-links a:hover { color: var(--text); background: var(--surface); }
.nav-links a.active { color: var(--text); background: var(--surface); }
.nav-sep { width: 1px; height: 20px; background: var(--border); margin: 0 4px; }
.mobile-toggle { display: none; background: none; border: none; color: var(--muted); font-size: 22px; cursor: pointer; padding: 4px 8px; border-radius: 6px; }
.mobile-toggle:hover { background: var(--surface); }

/* ════════ BUTTONS ════════ */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 9px 20px; border-radius: var(--radius-sm); font-size: 13px; font-weight: 600; border: none; cursor: pointer; transition: all .2s; text-decoration: none; white-space: nowrap; }
.btn-primary { background: var(--accent); color: #fff !important; }
.btn-primary:hover { background: var(--accent-bright); color: #fff !important; box-shadow: 0 0 20px rgba(99,102,241,.25); }
.btn-outline { background: transparent; color: var(--text) !important; border: 1px solid var(--border2); }
.btn-outline:hover { border-color: var(--muted); background: rgba(255,255,255,.04); color: var(--text) !important; }
.btn-ghost { background: transparent; color: var(--muted) !important; border: none; padding: 6px 12px; }
.btn-ghost:hover { color: var(--text) !important; background: var(--surface); }
.btn-lg { padding: 13px 30px; font-size: 15px; border-radius: 10px; }
a.btn, a.btn:hover { text-decoration: none; }

/* ════════ SECTIONS ════════ */
.section { max-width: 1200px; margin: 0 auto; padding: 80px 24px; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-header h1, .section-header h2 { font-size: 32px; font-weight: 700; margin-bottom: 12px; }
.section-header h1 { font-size: clamp(32px, 4.5vw, 48px); letter-spacing: -.5px; }
.section-header p { color: var(--muted); font-size: 16px; max-width: 640px; margin: 0 auto; line-height: 1.7; }
.section-header .accent { background: linear-gradient(135deg, var(--accent-glow), var(--blue)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

/* ════════ HERO ════════ */
.hero { max-width: 1200px; margin: 0 auto; padding: 72px 24px 56px; text-align: center; }
.hero h1 { font-size: clamp(36px, 5vw, 56px); font-weight: 800; line-height: 1.15; margin-bottom: 20px; letter-spacing: -1px; }
.hero p { font-size: 18px; color: var(--muted); max-width: 640px; margin: 0 auto 36px; line-height: 1.7; }
.hero-buttons { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ════════ CARDS ════════ */
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; transition: border-color .3s, transform .2s; }
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card-icon { width: 44px; height: 44px; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 20px; margin-bottom: 16px; }
.card h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 14px; line-height: 1.6; }

/* ════════ UPLOAD ZONE ════════ */
.tool-section { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.tool-inner { max-width: 800px; margin: 0 auto; padding: 80px 24px; }
.upload-zone { border: 2px dashed var(--border2); border-radius: var(--radius); padding: 48px 24px; text-align: center; cursor: pointer; transition: border-color .3s, background .3s; position: relative; }
.upload-zone:hover, .upload-zone.dragover { border-color: var(--accent); background: rgba(99,102,241,.04); }
.upload-zone input[type="file"] { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.upload-zone h3 { font-size: 18px; margin-bottom: 8px; }
.upload-zone p { color: var(--muted); font-size: 14px; }
.ocr-result { margin-top: 24px; display: none; }
.ocr-result textarea { width: 100%; min-height: 200px; background: var(--bg); color: var(--accent-glow); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px; font-family: 'Cascadia Code', Consolas, monospace; font-size: 14px; resize: vertical; }
.ocr-result .result-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.ocr-result .result-header span { color: var(--muted); font-size: 13px; }
.ocr-loading { display: none; text-align: center; padding: 32px; color: var(--muted); }
.spinner { width: 32px; height: 32px; border: 3px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin 1s linear infinite; margin: 0 auto 12px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ════════ STEPS ════════ */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; counter-reset: step; }
.step { text-align: center; padding: 24px; }
.step::before { counter-increment: step; content: counter(step); display: flex; width: 48px; height: 48px; align-items: center; justify-content: center; border-radius: 50%; background: var(--surface); border: 2px solid var(--accent); color: var(--accent-glow); font-weight: 700; font-size: 18px; margin: 0 auto 16px; }
.step h3 { font-size: 16px; margin-bottom: 8px; }
.step p { color: var(--muted); font-size: 14px; }

/* ════════ FAQ ════════ */
.faq-list { max-width: 700px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-q { padding: 20px 0; cursor: pointer; display: flex; justify-content: space-between; align-items: center; font-weight: 600; font-size: 15px; }
.faq-q::after { content: '+'; font-size: 20px; color: var(--muted); transition: transform .3s; }
.faq-q.open::after { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease; color: var(--muted); font-size: 14px; line-height: 1.7; }
.faq-a.open { max-height: 400px; padding-bottom: 20px; }

/* ════════ CTA ════════ */
.cta { text-align: center; padding: 80px 24px; }
.cta h2 { font-size: 32px; font-weight: 700; margin-bottom: 16px; }
.cta p { color: var(--muted); margin-bottom: 32px; font-size: 16px; }

/* ════════ BREADCRUMB ════════ */
.breadcrumb { padding: 12px 24px; max-width: 1200px; margin: 0 auto; font-size: 13px; color: var(--dim); }
.breadcrumb a { color: var(--muted); }

/* ════════ TABLE ════════ */
.comparison { width: 100%; border-collapse: collapse; margin: 24px 0; }
.comparison th, .comparison td { padding: 14px 20px; text-align: left; border-bottom: 1px solid var(--border); font-size: 14px; }
.comparison th { color: var(--muted); font-weight: 600; background: var(--surface); }
.comparison td { color: var(--text); }
.comparison .check { color: var(--green-glow); }
.comparison .cross { color: var(--dim); }

/* ════════ RELATED TOOLS ════════ */
.related-tools { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; margin-top: 32px; }
.related-tool { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px; text-align: center; transition: border-color .3s, transform .2s; color: var(--text); }
.related-tool:hover { border-color: var(--accent); transform: translateY(-1px); color: var(--text); }
.related-tool .icon { font-size: 24px; margin-bottom: 8px; }
.related-tool h4 { font-size: 14px; font-weight: 600; margin-bottom: 4px; color: var(--text); }
.related-tool p { color: var(--muted); font-size: 12px; }

/* ════════ FOOTER ════════ */
footer { border-top: 1px solid var(--border); padding: 32px 24px; }
.footer-inner { max-width: 1200px; margin: 0 auto; }
.footer-top { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 32px; margin-bottom: 24px; }
.footer-col h5 { color: var(--text); font-size: 13px; font-weight: 600; margin-bottom: 12px; text-transform: uppercase; letter-spacing: .5px; }
.footer-col a { display: block; color: var(--dim); font-size: 13px; line-height: 2; }
.footer-col a:hover { color: var(--muted); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; padding-top: 20px; border-top: 1px solid var(--border); }
.footer-copy { color: var(--dim); font-size: 13px; }

/* legacy compat */
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-links a { color: var(--dim); font-size: 13px; }
.footer-links a:hover { color: var(--muted); }

/* ════════ RESPONSIVE ════════ */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: rgba(13,17,23,.97); border-bottom: 1px solid var(--border); padding: 12px 16px; gap: 4px; backdrop-filter: blur(20px); }
    .nav-links.open a { padding: 10px 14px; border-radius: 8px; font-size: 14px; }
    .nav-links.open .nav-sep { display: none; }
    .mobile-toggle { display: block; }
    .hero { padding: 48px 16px 40px; }
    .section { padding: 48px 16px; }
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    .footer-inner { flex-direction: column; text-align: center; }
    .footer-top { flex-direction: column; gap: 24px; }
    .footer-bottom { flex-direction: column; }
    .hero-buttons { flex-direction: column; align-items: center; }
    .tool-inner { padding: 48px 16px; }
}