:root {
  color-scheme: light dark;

  --bg: #f5f6f8;
  --bg-grad-a: #ffffff;
  --bg-grad-b: #e8ecf3;
  --bg-elevated: #ffffff;
  --bg-elevated-2: #eef0f3;
  --bg-hover: #eef1f5;
  --card-alpha: 0.72;
  --blur: 14px;

  --border: #e3e5ea;
  --border-strong: #d3d6dc;

  --fg: #2b2e33;
  --fg-muted: #6b7280;
  --fg-subtle: #9aa1ac;

  --accent: #3b6fd8;
  --accent-hover: #2f5bc0;
  --accent-fg: #ffffff;
  --accent-soft: rgba(59, 111, 216, 0.12);

  --success: #1f9d55;
  --success-soft: rgba(31, 157, 85, 0.12);
  --danger: #c0392b;
  --danger-soft: rgba(192, 57, 43, 0.12);
  --warning: #92670a;
  --warning-soft: rgba(146, 103, 10, 0.12);

  --radius-sm: 8px;
  --radius: 16px;
  --shadow: 0 8px 30px rgba(30, 40, 60, 0.08);

  --content-width: 900px;
  --header-height: 64px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #15171b;
    --bg-grad-a: #0f172a;
    --bg-grad-b: #020617;
    --bg-elevated: #1e2126;
    --bg-elevated-2: #262a30;
    --bg-hover: #22252b;
    --card-alpha: 0.62;

    --border: #2c2f36;
    --border-strong: #3a3e46;

    --fg: #e6e8eb;
    --fg-muted: #9aa1ac;
    --fg-subtle: #6b7280;

    --accent: #5b8def;
    --accent-hover: #79a5f5;
    --accent-fg: #ffffff;
    --accent-soft: rgba(91, 141, 239, 0.14);

    --success: #4cc178;
    --success-soft: rgba(76, 193, 120, 0.14);
    --danger: #e2626c;
    --danger-soft: rgba(226, 98, 108, 0.14);
    --warning: #fbbf24;
    --warning-soft: rgba(251, 191, 36, 0.14);

    --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  }
}

:root[data-theme="dark"] {
  --bg: #15171b;
  --bg-grad-a: #0f172a;
  --bg-grad-b: #020617;
  --bg-elevated: #1e2126;
  --bg-elevated-2: #262a30;
  --bg-hover: #22252b;
  --card-alpha: 0.62;

  --border: #2c2f36;
  --border-strong: #3a3e46;

  --fg: #e6e8eb;
  --fg-muted: #9aa1ac;
  --fg-subtle: #6b7280;

  --accent: #5b8def;
  --accent-hover: #79a5f5;
  --accent-fg: #ffffff;
  --accent-soft: rgba(91, 141, 239, 0.14);

  --success: #4cc178;
  --success-soft: rgba(76, 193, 120, 0.14);
  --danger: #e2626c;
  --danger-soft: rgba(226, 98, 108, 0.14);
  --warning: #fbbf24;
  --warning-soft: rgba(251, 191, 36, 0.14);

  --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.55;
  background: radial-gradient(circle at top, var(--bg-grad-a), var(--bg-grad-b)) fixed;
  background-color: var(--bg);
  color: var(--fg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1, h2, h3 {
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--fg);
}

h1 {
  font-size: 1.2rem;
  margin: 0;
}

h2 {
  font-size: 0.95rem;
  margin: 2rem 0 0.75rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 600;
}

code {
  font-family: ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 0.9em;
  background: var(--bg-elevated-2);
  padding: 0.1em 0.4em;
  border-radius: 4px;
}

main {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

main > h1 {
  margin-bottom: 1.5rem;
}

body.has-header {
  padding-top: var(--header-height);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background: color-mix(in srgb, var(--bg-elevated) calc(var(--card-alpha) * 100%), transparent);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  height: 100%;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.brand {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--fg);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.brand:hover {
  color: var(--accent);
  text-decoration: none;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-left: auto;
}

.user-menu {
  position: relative;
}

.user-menu-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  width: auto;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.4em 0.9em 0.4em 0.5em;
  margin: 0;
  cursor: pointer;
  font-size: 0.9em;
  font-weight: 500;
  color: var(--fg);
}

.user-menu-btn:hover {
  background: transparent;
  border-color: var(--accent);
}

.avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-fg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8em;
  font-weight: 600;
  flex-shrink: 0;
}

.dropdown {
  display: none;
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  background: color-mix(in srgb, var(--bg-elevated) 88%, transparent);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  min-width: 180px;
  overflow: hidden;
  z-index: 10;
}

.dropdown.open {
  display: block;
}

.dropdown a, .dropdown form {
  margin: 0;
}

.dropdown a {
  display: block;
  padding: 0.8em 1em;
  font-size: 0.9em;
  color: var(--fg);
}

.dropdown a:hover {
  background: var(--bg);
  text-decoration: none;
}

.dropdown-logout {
  display: block;
  width: 100%;
  background: transparent;
  border: none;
  border-radius: 0;
  color: var(--danger);
  font-weight: 500;
  font-size: 0.9em;
  text-align: left;
  padding: 0.8em 1em;
}

.dropdown-logout:hover {
  background: var(--bg);
}

.site-footer {
  max-width: var(--content-width);
  margin: 3rem auto 0;
  padding: 1.5rem 1.5rem 2.5rem;
  text-align: center;
  font-size: 0.78rem;
  color: var(--fg-subtle);
  line-height: 1.7;
}

.spinner-lg {
  margin: 1.5rem auto;
  width: 44px;
  height: 44px;
  border: 3px solid var(--border-strong);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.muted {
  color: var(--fg-muted);
}

.error {
  color: var(--danger);
  background: var(--danger-soft);
  border: 1px solid rgba(248, 113, 113, 0.25);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.85rem;
  font-size: 0.85rem;
  margin: 0 0 1.25rem;
}

label {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--fg-muted);
  margin: 0 0 0.35rem;
}

input[type="text"],
input[type="email"],
input[type="url"],
select,
textarea {
  width: 100%;
  padding: 0.55rem 0.7rem;
  margin-bottom: 1.1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  color: var(--fg);
  font-size: 0.9rem;
  font-family: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

textarea {
  resize: vertical;
  min-height: 2.5rem;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

button {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1.1rem;
  background: var(--accent);
  color: var(--accent-fg);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 0.87rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.05s ease;
}

button:hover {
  background: var(--accent-hover);
}

button:active {
  transform: translateY(1px);
}

button.secondary {
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--fg);
}

button.secondary:hover {
  background: var(--bg-hover);
}

button.danger {
  background: transparent;
  border: 1px solid rgba(248, 113, 113, 0.35);
  color: var(--danger);
}

button.danger:hover {
  background: var(--danger-soft);
  border-color: var(--danger);
}

.link-button {
  background: transparent;
  border: none;
  color: var(--fg-muted);
  font-size: 0.85rem;
  text-decoration: underline;
  cursor: pointer;
  padding: 0;
  width: auto;
}

.actions {
  display: flex;
  gap: 0.5rem;
  margin: 1.25rem 0 1.75rem;
  flex-wrap: wrap;
}

.actions form {
  margin: 0;
}

/* ---------- login / onboarding ---------- */

.center-box {
  max-width: 380px;
  margin: 12vh auto 0;
  padding: 2rem;
  background: color-mix(in srgb, var(--bg-elevated) calc(var(--card-alpha) * 100%), transparent);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.center-box h1 {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}

.center-box button {
  width: 100%;
  justify-content: center;
  margin-top: 0.25rem;
}

.role-choice {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.role-choice button {
  flex: 1;
  flex-direction: column;
  padding: 1.5rem 1rem;
  font-size: 1rem;
}

/* ---------- playlist cards / table ---------- */

.playlist-list {
  display: grid;
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.playlist-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: color-mix(in srgb, var(--bg-elevated) calc(var(--card-alpha) * 100%), transparent);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  box-shadow: var(--shadow);
}

.playlist-card h3 {
  margin: 0 0 0.25rem;
  font-size: 1rem;
  font-weight: 600;
}

.playlist-card p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--fg-muted);
}

.playlist-card-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.badge {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge-public {
  background: var(--success-soft);
  color: var(--success);
}

.badge-private {
  background: var(--bg-elevated-2);
  color: var(--fg-muted);
}

/* ---------- playlist item rows (form) ---------- */

.item-row {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  margin-bottom: 1rem;
  background: var(--bg-elevated);
}

.item-row-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.item-row-header span {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.item-row-remove {
  background: transparent;
  border: none;
  color: var(--danger);
  font-size: 0.8rem;
  padding: 0;
}

/* ---------- player ---------- */

.player-video {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 1.25rem;
}

.player-video iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.player-instructions {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
  white-space: pre-wrap;
}

.player-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
}

.player-controls .position {
  color: var(--fg-muted);
  font-size: 0.9rem;
}