:root {
  --bg:           #0b0d12;
  --bg-elevated:  #161922;
  --bg-panel:     #1d2230;
  --fg:           #e7eaf0;
  --fg-muted:     #8a92a6;
  --accent:       #5b8def;
  --accent-warm:  #f2a93b;
  --ok:           #2ecc71;
  --warn:         #f2a93b;
  --err:          #e74c3c;
  --border:       #2a3142;
  --radius:       10px;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', sans-serif;
  --font-mono: 'SF Mono', 'Menlo', 'Consolas', monospace;
  --font-serif: 'Playfair Display', 'Georgia', serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  min-height: 100%;
}

button {
  font-family: inherit;
  font-size: 14px;
  padding: 9px 18px;
  background: var(--accent);
  color: white;
  border: 0;
  border-radius: var(--radius);
  cursor: pointer;
}
button:hover { filter: brightness(1.1); }
button.ghost {
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--border);
}
button.ghost:hover { border-color: var(--accent); }

input, select {
  background: var(--bg-panel);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
  font-size: 15px;
  font-family: inherit;
  width: 100%;
}

a, .link { color: var(--accent); cursor: pointer; }

.error { color: var(--err); min-height: 1.4em; font-size: 13px; margin: 6px 0 0; }
.hint  { color: var(--fg-muted); font-size: 13px; margin: 4px 0; }

.view { display: none; max-width: 1100px; margin: 0 auto; padding: 32px 24px; }
#admin-shell[data-view="login"] #view-login,
#admin-shell[data-view="new-password"] #view-new-password,
#admin-shell[data-view="library"] #view-library,
#admin-shell[data-view="session"] #view-session  { display: block; }

#admin-shell[data-view="loading"] #loading { display: flex; }
#loading {
  display: none;
  position: fixed; inset: 0;
  align-items: center; justify-content: center;
  background: var(--bg);
}
.spinner {
  width: 36px; height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Login ───────────────────────────────────────────────────────────── */
#view-login, #view-new-password { max-width: 400px; margin-top: 80px; }
#view-login h1, #view-new-password h1 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 32px;
  margin: 0 0 24px;
}
#login-form, #new-password-form {
  display: grid; gap: 14px;
}
#login-form label, #new-password-form label {
  display: grid; gap: 6px;
  font-size: 13px;
  color: var(--fg-muted);
}

/* ── Library ─────────────────────────────────────────────────────────── */
.bar {
  display: flex; align-items: center; gap: 16px;
  margin-bottom: 24px;
}
.bar h1 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 28px;
  margin: 0;
  flex: 1;
}
.bar-right { display: flex; align-items: center; gap: 12px; }
.bar-right .user { color: var(--fg-muted); font-size: 13px; }

.upload-zone {
  background: var(--bg-elevated);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 24px;
  transition: border-color 0.2s, background 0.2s;
}
.upload-zone[data-state="idle"]      .upload-form     { display: none; }
.upload-zone[data-state="ready"]     .upload-prompt   { display: none; }
.upload-zone[data-state="uploading"] .upload-prompt,
.upload-zone[data-state="uploading"] .upload-form     { display: none; }
.upload-zone.dragover { border-color: var(--accent); background: rgba(91,141,239,0.08); }
.upload-prompt { text-align: center; }
.upload-prompt p { margin: 0; }

.upload-form {
  display: grid;
  gap: 16px;
}
.upload-meta {
  display: flex; align-items: baseline; gap: 12px;
  font-family: var(--font-mono);
  font-size: 14px;
}
.upload-meta .muted { color: var(--fg-muted); font-size: 12px; }
.upload-fields {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 12px;
}
.upload-fields label {
  display: grid; gap: 4px;
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--fg-muted);
}
.upload-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}
.upload-progress {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--fg-muted);
  text-align: center;
}
.upload-progress[data-state="error"] { color: var(--err); }
.upload-progress[data-state="ok"]    { color: var(--ok); }
.upload-progress .bar {
  display: inline-block;
  width: 200px; height: 4px;
  background: var(--border);
  border-radius: 2px;
  margin-left: 8px;
  vertical-align: middle;
  position: relative;
  overflow: hidden;
}
.upload-progress .bar > span {
  position: absolute; left: 0; top: 0; bottom: 0;
  background: var(--accent);
  transition: width 0.1s linear;
}

table.decks {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-elevated);
  border-radius: var(--radius);
  overflow: hidden;
}
table.decks th, table.decks td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
table.decks th {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-muted);
  background: rgba(255,255,255,0.02);
}
table.decks tr:last-child td { border-bottom: 0; }
table.decks td.actions { text-align: right; white-space: nowrap; }
table.decks td.actions button {
  font-size: 13px;
  padding: 6px 10px;
  margin-left: 6px;
}

/* ── Session ─────────────────────────────────────────────────────────── */
.session-grid {
  display: grid;
  gap: 16px;
}
.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
}
.card h3 {
  margin: 0 0 4px;
  font-size: 14px;
  font-weight: 600;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.copyable {
  display: flex; align-items: center; gap: 10px;
  margin-top: 10px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 8px 8px 14px;
}
.copyable code {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--fg);
  word-break: break-all;
}

ul.presence {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 13px;
}
ul.presence li {
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 10px;
}
ul.presence li:last-child { border-bottom: 0; }
ul.presence li .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--ok);
}
ul.presence li.empty {
  color: var(--fg-muted);
  font-style: italic;
}