:root {
  --bg: #0b1020;
  --bg-2: #101736;
  --card: rgba(255, 255, 255, 0.06);
  --card-border: rgba(255, 255, 255, 0.12);
  --text: #e8ecf8;
  --muted: #9aa5c4;
  --accent: #34d399;
  --accent-2: #60a5fa;
  --warn: #fbbf24;
  --danger: #f87171;
  --radius: 20px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

.bg { position: fixed; inset: 0; overflow: hidden; z-index: -1; }
.orb { position: absolute; border-radius: 50%; filter: blur(90px); opacity: .55; animation: float 18s ease-in-out infinite alternate; }
.orb-a { width: 60vw; height: 60vw; left: -20vw; top: -20vw; background: radial-gradient(circle, #1d4ed8, transparent 65%); }
.orb-b { width: 50vw; height: 50vw; right: -15vw; bottom: -20vw; background: radial-gradient(circle, #059669, transparent 65%); animation-delay: -9s; }
.grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px); background-size: 48px 48px; mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%); }
@keyframes float { from { transform: translate3d(0,0,0) scale(1); } to { transform: translate3d(4vw, 3vw, 0) scale(1.08); } }
@media (prefers-reduced-motion: reduce) { .orb { animation: none; } }

.top { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 18px clamp(16px, 4vw, 48px); }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.15rem; color: var(--text); letter-spacing: -.01em; }
.brand:hover { text-decoration: none; }
.logo { display: inline-flex; }
.nav { display: flex; align-items: center; gap: 18px; font-weight: 500; font-size: .95rem; }
.nav a { color: var(--muted); }
.nav a:hover { color: var(--text); text-decoration: none; }
.lang { background: var(--card); border: 1px solid var(--card-border); color: var(--text); border-radius: 999px; padding: 6px 12px; font: inherit; font-weight: 600; cursor: pointer; }
.lang:hover { border-color: var(--accent); }
@media (max-width: 640px) { .nav a { display: none; } }

main { max-width: 880px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 32px) 64px; }
.hero { padding-top: clamp(24px, 6vw, 64px); text-align: center; }
.eyebrow { color: var(--accent); font-weight: 600; letter-spacing: .08em; text-transform: uppercase; font-size: .78rem; margin: 0 0 12px; }
h1 { font-size: clamp(2rem, 5.5vw, 3.4rem); line-height: 1.08; letter-spacing: -.03em; margin: 0 0 18px; font-weight: 800; }
.lead { color: var(--muted); font-size: clamp(1rem, 2vw, 1.15rem); max-width: 680px; margin: 0 auto 32px; }

.drop {
  position: relative; border-radius: var(--radius); padding: clamp(28px, 6vw, 56px) 24px; cursor: pointer;
  background: linear-gradient(var(--bg-2), var(--bg-2)) padding-box, linear-gradient(120deg, var(--accent), var(--accent-2), #a78bfa, var(--accent)) border-box;
  border: 2px dashed transparent; background-size: 100% 100%, 300% 300%; animation: border-move 8s linear infinite;
  transition: transform .2s ease, box-shadow .2s ease; outline: none;
}
.drop:hover, .drop:focus-visible, .drop.over { transform: translateY(-2px); box-shadow: 0 20px 60px rgba(52, 211, 153, .18); }
.drop.over { border-style: solid; }
.drop.busy { cursor: progress; }
@keyframes border-move { to { background-position: 0 0, 300% 0; } }
.drop-icon { color: var(--accent); margin-bottom: 8px; }
.drop-title { font-size: 1.2rem; font-weight: 700; margin: 0 0 6px; }
.drop-sub { color: var(--muted); margin: 0; font-size: .95rem; }
.progress { margin-top: 20px; height: 10px; border-radius: 999px; background: rgba(255,255,255,.08); position: relative; margin-bottom: 22px; }
.progress .bar { height: 100%; width: 0; border-radius: 999px; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width .15s linear; }
.progress span { position: absolute; right: 0; top: 14px; font-size: .8rem; color: var(--muted); white-space: nowrap; }
.check { width: 100%; display: flex; align-items: center; gap: 8px; font-size: .9rem; color: var(--muted); cursor: pointer; }
.check input { accent-color: var(--accent); width: 16px; height: 16px; }

.card { background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); padding: 22px; margin-top: 22px; text-align: left; animation: rise .35s ease; }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.file-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.file-name { font-weight: 700; word-break: break-all; }
.file-size { color: var(--muted); font-size: .9rem; }
.badge { display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px; border-radius: 999px; font-weight: 700; font-size: .85rem; border: 1px solid transparent; white-space: nowrap; }
.badge::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: currentColor; box-shadow: 0 0 10px currentColor; }
.badge.unknown { color: var(--muted); border-color: var(--card-border); }
.badge.pending { color: var(--warn); border-color: rgba(251,191,36,.35); background: rgba(251,191,36,.08); }
.badge.pending::before { animation: pulse 1.2s ease-in-out infinite; }
.badge.confirmed { color: var(--accent); border-color: rgba(52,211,153,.35); background: rgba(52,211,153,.08); }
.badge.expired { color: var(--danger); border-color: rgba(248,113,113,.35); background: rgba(248,113,113,.08); }
.badge.busy { color: var(--accent-2); }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .3; } }

.hash-row { display: flex; align-items: center; gap: 10px; margin: 16px 0 8px; background: rgba(0,0,0,.25); border-radius: 12px; padding: 10px 12px; }
.hash-label { font-size: .75rem; font-weight: 700; color: var(--muted); letter-spacing: .06em; }
.hash { font-family: var(--mono); font-size: .82rem; word-break: break-all; flex: 1; color: var(--text); }
.icon-btn { background: transparent; border: 1px solid var(--card-border); color: var(--muted); border-radius: 10px; padding: 6px; cursor: pointer; display: inline-flex; }
.icon-btn:hover { color: var(--text); border-color: var(--accent); }
.icon-btn.done { color: var(--accent); border-color: var(--accent); }

.status { margin-top: 10px; }
.status .kv { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; font-size: .95rem; margin-top: 10px; }
.status .kv dt { color: var(--muted); }
.status .kv dd { margin: 0; word-break: break-all; }
.status .kv .mono { font-family: var(--mono); font-size: .82rem; }
.status .msg { margin: 6px 0 0; color: var(--muted); }
.status .msg strong { color: var(--text); }

.actions { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.note-label { width: 100%; font-size: .85rem; color: var(--muted); }
#note { flex: 1 1 100%; background: rgba(0,0,0,.25); border: 1px solid var(--card-border); color: var(--text); border-radius: 12px; padding: 12px 14px; font: inherit; }
#note:focus { outline: none; border-color: var(--accent-2); }
.btn { border: 1px solid var(--card-border); background: var(--card); color: var(--text); border-radius: 12px; padding: 12px 18px; font: inherit; font-weight: 600; cursor: pointer; transition: transform .15s ease, background .15s ease; }
.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn.primary { background: linear-gradient(120deg, var(--accent), #10b981); color: #062015; border-color: transparent; box-shadow: 0 10px 30px rgba(52,211,153,.25); }
.btn.primary:disabled { opacity: .55; cursor: not-allowed; transform: none; }
.btn.ghost { background: transparent; }
.quota { width: 100%; margin: 4px 0 0; font-size: .85rem; color: var(--muted); }
.error { color: var(--danger); margin: 12px 0 0; font-weight: 500; }

.section { margin-top: clamp(48px, 8vw, 80px); }
.section h2 { font-size: clamp(1.4rem, 3vw, 2rem); letter-spacing: -.02em; margin: 0 0 16px; }
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.step { background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius); padding: 20px; }
.step .num { display: inline-flex; width: 32px; height: 32px; align-items: center; justify-content: center; border-radius: 10px; background: rgba(52,211,153,.15); color: var(--accent); font-weight: 800; margin-bottom: 10px; }
.step h3 { margin: 0 0 6px; font-size: 1.05rem; }
.step p { margin: 0; color: var(--muted); font-size: .95rem; }

.verify-form { display: flex; gap: 10px; flex-wrap: wrap; }
.verify-form input { flex: 1 1 320px; background: var(--card); border: 1px solid var(--card-border); color: var(--text); border-radius: 12px; padding: 12px 14px; font: inherit; font-family: var(--mono); font-size: .9rem; }
.verify-form input:focus { outline: none; border-color: var(--accent-2); }

details { background: var(--card); border: 1px solid var(--card-border); border-radius: 14px; padding: 12px 16px; margin-bottom: 10px; }
summary { cursor: pointer; font-weight: 600; }
details p { color: var(--muted); margin: 10px 0 4px; }

.foot { text-align: center; color: var(--muted); font-size: .88rem; padding: 32px 16px 48px; border-top: 1px solid var(--card-border); }
.foot p { margin: 6px 0; }

.print-sheet { display: none; }
@media print {
  body > *:not(.print-sheet) { display: none !important; }
  .print-sheet { display: block; color: #000; font-family: Georgia, serif; padding: 24px; }
  .print-sheet h1 { margin: 0; }
  .print-sheet .print-sub { color: #555; margin: 4px 0 24px; }
  .print-sheet table { border-collapse: collapse; width: 100%; }
  .print-sheet th, .print-sheet td { text-align: left; padding: 8px 10px; border-bottom: 1px solid #ccc; vertical-align: top; }
  .print-sheet th { width: 34%; color: #333; }
  .print-sheet .mono { font-family: monospace; word-break: break-all; }
  .print-sheet .print-note { color: #444; font-size: .9rem; margin-top: 24px; }
  .print-sheet .print-date { color: #777; font-size: .85rem; }
}