:root {
  --bg: #0b0f14;
  --surface: #131a23;
  --border: #243244;
  --fg: #e6edf3;
  --muted: #8b98a9;
  --accent: #4ade80;
  --error: #f87171;
  --warning: #fbbf24;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 1rem;
  padding-bottom: max(1rem, env(safe-area-inset-bottom));
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-text-size-adjust: 100%;
}

main { max-width: 34rem; margin: 0 auto; }

h1 { font-size: 1.5rem; margin: 0 0 .25rem; }
.sub { color: var(--muted); margin: 0 0 1.25rem; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: .75rem;
  padding: .9rem;
  margin-bottom: .75rem;
}

.slot {
  display: flex;
  gap: .75rem;
  align-items: center;
  cursor: pointer;
  min-height: 2.75rem;
}
.slot small { display: block; color: var(--muted); }
.step {
  flex: none;
  width: 1.75rem; height: 1.75rem;
  border: 1px solid var(--border);
  border-radius: 50%;
  display: grid; place-items: center;
  color: var(--accent);
  font-weight: 600;
}
input[type="file"] { display: block; margin-top: .5rem; width: 100%; font-size: .85rem; }

.picked { margin-top: .5rem; font-size: .9rem; color: var(--accent); overflow-wrap: anywhere; }
.url-row { display: flex; gap: .5rem; margin-top: .5rem; }
.url-row input[type="url"] {
  flex: 1;
  min-width: 0;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: .5rem;
  padding: .55rem .6rem;
  font-size: .85rem;
}
.meta { margin-top: .5rem; font-size: .8rem; color: var(--muted); overflow-wrap: anywhere; }
.mono, .fingerprint { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

button {
  font: inherit;
  padding: .8rem 1.4rem;
  border-radius: .6rem;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #052e13;
  font-weight: 700;
}
button:disabled { opacity: .4; }
button.ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--border);
  font-weight: 400;
  padding: .5rem .9rem;
  font-size: .85rem;
}
#actions { display: flex; gap: .75rem; align-items: center; margin: 1rem 0; }

details { margin-top: .5rem; }
summary { cursor: pointer; color: var(--muted); }
textarea {
  width: 100%;
  min-height: 7rem;
  margin-top: .5rem;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: .5rem;
  padding: .6rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .8rem;
}

#progress-wrap { margin: 1rem 0; }
#progress-bar {
  height: .5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: .25rem;
  overflow: hidden;
}
#progress-fill { height: 100%; width: 0; background: var(--accent); transition: width .15s; }
#progress-label { font-size: .75rem; color: var(--muted); }

#result .banner {
  border-radius: .75rem;
  padding: 1rem;
  font-size: 1.15rem;
  font-weight: 700;
  text-align: center;
}
#result.valid .banner { background: rgba(74, 222, 128, .12); border: 1px solid var(--accent); color: var(--accent); }
#result.invalid .banner { background: rgba(248, 113, 113, .1); border: 1px solid var(--error); color: var(--error); }

#result table { width: 100%; border-collapse: collapse; margin-top: .75rem; font-size: .9rem; }
#result td { padding: .3rem .4rem; border-bottom: 1px solid var(--border); vertical-align: top; }
#result td:first-child { color: var(--muted); white-space: nowrap; width: 8.5rem; }

#result .error {
  margin-top: .75rem;
  color: var(--error);
  overflow-wrap: anywhere;
}
#result ul.warnings { margin: .75rem 0 0; padding-left: 1.25rem; color: var(--warning); font-size: .9rem; }

#help { color: var(--muted); font-size: .9rem; margin-top: 1.5rem; }
#help ul { padding-left: 1.25rem; }
footer { color: var(--muted); font-size: .78rem; margin-top: 1.5rem; }