:root {
  --bg: #06222b;
  --bg-deep: #04161c;
  --panel: #0a3542;
  --panel-2: #0d4254;
  --ink: #eaf7f5;
  --ink-dim: #a8c8c4;
  --aqua: #2ee6c8;
  --aqua-deep: #14b8a6;
  --sand: #eccf9a;
  --line: rgba(46, 230, 200, 0.18);
  --radius: 14px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
  background-attachment: fixed;
  color: var(--ink);
  min-height: 100vh;
}

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  clip: rect(0 0 0 0); overflow: hidden; white-space: nowrap;
}

/* ---------- Header ---------- */
.app-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(6, 34, 43, 0.92);
  backdrop-filter: blur(8px);
  padding: calc(12px + env(safe-area-inset-top)) 16px 12px;
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark { border-radius: 10px; flex: none; }
.brand h1 { margin: 0; font-size: 1.55rem; letter-spacing: 0.4px; color: var(--ink); }
.brand h1::after { content: ""; }
.tagline { margin: 2px 0 0; color: var(--sand); font-size: 0.92rem; }

.progress-wrap { margin-top: 12px; }
.progress-text { font-size: 0.85rem; color: var(--ink-dim); margin-bottom: 5px; }
.progress-bar {
  height: 8px; border-radius: 99px;
  background: rgba(255,255,255,0.10); overflow: hidden;
}
.progress-fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--aqua-deep), var(--aqua));
  border-radius: 99px;
  transition: width 0.35s ease;
}

.search-row { margin-top: 12px; }
.search-row input {
  width: 100%; padding: 12px 14px; font-size: 1rem;
  border-radius: 99px; border: 1px solid var(--line);
  background: var(--panel); color: var(--ink);
  outline: none;
}
.search-row input:focus { border-color: var(--aqua); }
.search-row input::placeholder { color: var(--ink-dim); }

.chips {
  display: flex; gap: 8px; margin-top: 12px;
  overflow-x: auto; padding-bottom: 4px;
  -webkit-overflow-scrolling: touch; scrollbar-width: none;
}
.chips::-webkit-scrollbar { display: none; }
.chip {
  flex: none; cursor: pointer;
  padding: 8px 14px; border-radius: 99px;
  border: 1px solid var(--line);
  background: transparent; color: var(--ink-dim);
  font-size: 0.88rem;
}
.chip.active {
  background: var(--aqua); border-color: var(--aqua);
  color: #03302b; font-weight: 600;
}

/* ---------- Library grid ---------- */
main { padding: 16px; max-width: 1100px; margin: 0 auto; }

.grid {
  display: grid; gap: 14px;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) { .grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 980px) { .grid { grid-template-columns: 1fr 1fr 1fr; } }

.card {
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  display: flex; flex-direction: column; gap: 9px;
}
.card.watched { opacity: 0.72; }
.card .step {
  align-self: flex-start;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.8px;
  color: #03302b; background: var(--sand);
  padding: 3px 9px; border-radius: 99px; text-transform: uppercase;
}
.card h2 { margin: 0; font-size: 1.05rem; line-height: 1.35; }
.card p { margin: 0; color: var(--ink-dim); font-size: 0.92rem; line-height: 1.5; flex: 1; }
.card .collection-tag { font-size: 0.78rem; color: var(--aqua); letter-spacing: 0.3px; }
.card .actions { display: flex; gap: 8px; align-items: center; margin-top: 2px; }
.btn-watch {
  flex: 1; text-align: center; text-decoration: none;
  background: var(--aqua); color: #03302b; font-weight: 700;
  padding: 11px 10px; border-radius: 10px; font-size: 0.95rem;
}
.btn-watched {
  cursor: pointer;
  background: transparent; color: var(--ink-dim);
  border: 1px solid var(--line); border-radius: 10px;
  padding: 11px 12px; font-size: 0.9rem;
}
.btn-watched.on { color: var(--aqua); border-color: var(--aqua); }
.btn-remove {
  cursor: pointer;
  background: transparent; color: #e08f8f;
  border: 1px solid rgba(224,143,143,0.35); border-radius: 10px;
  padding: 11px 12px; font-size: 0.9rem;
}

.empty { text-align: center; color: var(--ink-dim); padding: 42px 10px; }

/* ---------- Add form ---------- */
.add-panel {
  margin-top: 22px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 6px 16px 16px;
}
.add-panel summary {
  cursor: pointer; font-weight: 700; padding: 12px 0 6px;
  color: var(--aqua); font-size: 1rem; list-style: none;
}
.add-panel summary::-webkit-details-marker { display: none; }
.add-form { display: grid; gap: 12px; margin-top: 8px; }
.add-form label { display: grid; gap: 6px; font-size: 0.88rem; color: var(--ink-dim); }
.add-form input, .add-form select, .add-form textarea {
  padding: 12px; font-size: 1rem; border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--bg); color: var(--ink);
  font-family: inherit; outline: none; width: 100%;
}
.add-form input:focus, .add-form select:focus, .add-form textarea:focus { border-color: var(--aqua); }
.btn-primary {
  cursor: pointer; border: none;
  background: var(--aqua); color: #03302b; font-weight: 700;
  padding: 13px; border-radius: 10px; font-size: 1rem;
}
.device-note { margin: 0; font-size: 0.82rem; color: var(--sand); text-align: center; }

/* ---------- Footer ---------- */
.app-footer {
  text-align: center; color: var(--ink-dim);
  font-size: 0.83rem; padding: 8px 16px calc(26px + env(safe-area-inset-bottom));
}