:root {
  --bg: #ffffff;
  --fg: #16181d;
  --muted: #6b7280;
  --line: #e4e6ea;
  --soft: #f6f7f8;
  --accent: #d92d20;
  --accent-dark: #b42318;
  --ok: #067647;
  --radius: 12px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.head, main, .foot {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
}

.head { padding-top: 28px; }

h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

/* ---------- tool ---------- */

.tool {
  margin-top: 18px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

#form {
  display: flex;
  gap: 10px;
}

#input {
  flex: 1 1 auto;
  min-width: 0;
  height: 46px;
  padding: 0 14px;
  font: inherit;
  color: var(--fg);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  outline: none;
}

#input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(217, 45, 32, 0.12);
}

#input::placeholder { color: #9ca3af; }

#go {
  flex: 0 0 auto;
  height: 46px;
  padding: 0 20px;
  font: inherit;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 10px;
  cursor: pointer;
}

#go:hover { background: var(--accent-dark); border-color: var(--accent-dark); }
#go:active { transform: translateY(1px); }
#go[disabled] { opacity: 0.6; cursor: default; }

.status {
  margin: 10px 2px 0;
  min-height: 20px;
  font-size: 14px;
  color: var(--muted);
}

.status.is-error { color: var(--accent-dark); }

/* ---------- results ---------- */

.results { margin-top: 22px; }

.results-head { margin-bottom: 14px; }

#video-title {
  margin: 0;
  font-size: 17px;
  font-weight: 650;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.summary {
  margin: 4px 0 0;
  font-size: 14px;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(238px, 1fr));
  gap: 14px;
}

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  background: #fff;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.thumb {
  display: block;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.thumb img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 210px;
  object-fit: contain;
  margin: 0 auto;
}

.meta { min-width: 0; }

.name {
  font-size: 13px;
  font-weight: 600;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  overflow-wrap: anywhere;
}

.size {
  margin-top: 2px;
  font-size: 13px;
  color: var(--muted);
}

.actions {
  display: flex;
  gap: 8px;
  margin-top: auto;
}

.btn {
  flex: 1 1 0;
  min-height: 38px;
  padding: 0 8px;
  font: inherit;
  font-size: 14px;
  font-weight: 550;
  color: var(--fg);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
  white-space: nowrap;
}

.btn:hover { border-color: #c9ccd1; background: #fafbfc; }
.btn.is-primary { color: #fff; background: var(--accent); border-color: var(--accent); }
.btn.is-primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); }
.btn.is-done { color: var(--ok); border-color: var(--ok); }

/* ---------- prose ---------- */

.prose {
  margin: 34px 0 8px;
  max-width: 760px;
}

.prose section { margin-bottom: 30px; }

.prose h2 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.prose p { margin: 0 0 10px; color: #33373f; }

.list { margin: 0 0 12px; padding-left: 22px; color: #33373f; }
.list li { margin-bottom: 5px; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13.5px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 1px 5px;
  overflow-wrap: anywhere;
}

.table {
  width: 100%;
  border-collapse: collapse;
  margin: 6px 0 12px;
  font-size: 14.5px;
}

.table th, .table td {
  text-align: left;
  padding: 9px 10px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.table th { font-weight: 600; color: var(--muted); font-size: 13px; text-transform: uppercase; letter-spacing: 0.04em; }

.note { font-size: 13.5px; color: var(--muted); }

/* ---------- footer ---------- */

.foot {
  margin: 26px auto 40px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
}

/* ---------- mobile ---------- */

@media (max-width: 640px) {
  .head { padding-top: 20px; }
  h1 { font-size: 20px; }
  #form { flex-direction: column; }
  #go { width: 100%; }
  .grid { grid-template-columns: 1fr; gap: 12px; }
  .thumb img { max-height: 240px; }
  .table th, .table td { padding: 8px 6px; font-size: 13.5px; }
  .table-scroll { overflow-x: auto; }
}

@media (max-width: 400px) {
  .head, main, .foot { padding: 0 14px; }
  .actions { flex-direction: column; }
}