*,
*::before,
*::after {
  box-sizing: border-box;
}

/* MINI YESHIVA THEME */
:root {
  --bg: #0b1120;               /* Midnight Navy */
  --bg-card: #111827;          /* Slightly lighter navy */
  --accent: #0ea5e9;           /* Electric Teal */
  --accent-soft: rgba(14, 165, 233, 0.18);
  --accent-gold: #facc15;      /* Gold Radiance */
  --text: #e5e7eb;             /* Light gray */
  --text-soft: #9ca3af;        /* Muted gray */
  --border: #1f2937;           /* Deep border */
  --error: #ff6b6b;
  --radius-lg: 16px;
  --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.55);
  --transition-fast: 0.2s ease;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: radial-gradient(circle at top, #1e3a8a 0, #0b1120 45%, #000 100%);
  color: var(--text);
  font-family: var(--font-sans);
}

body {
  display: flex;
  justify-content: center;
  align-items: stretch;
}

/* App layout */

.app {
  width: 100%;
  max-width: 1100px;
  margin: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.app__header {
  text-align: center;
  padding: 16px 8px 8px;
}

.app__header h1 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin: 0 0 6px;
}

.app__header p {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.95rem;
}

.app__main {
  display: grid;
  gap: 16px;
}

@media (min-width: 880px) {
  .app__main {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.2fr);
    align-items: start;
  }
}

/* Cards */

.card {
  background: linear-gradient(135deg, #111827, #020617);
  border-radius: var(--radius-lg);
  padding: 18px 18px 20px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
}

.card h2 {
  margin: 0 0 12px;
  font-size: 1.1rem;
  color: var(--accent-gold);
}

/* Course summary */

.course-summary {
  margin-top: 8px;
  padding: 8px 10px;
  border-radius: 10px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px dashed var(--border);
  font-size: 0.9rem;
  color: var(--text-soft);
}

/* Form */

#course-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--text-soft);
}

label small {
  font-size: 0.8rem;
  color: var(--text-soft);
}

input[type="text"],
textarea {
  padding: 9px 11px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background-color: rgba(15, 23, 42, 0.96);
  color: var(--text);
  font-size: 0.93rem;
  outline: none;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-fast);
}

textarea {
  resize: vertical;
  min-height: 120px;
}

input::placeholder,
textarea::placeholder {
  color: #6b7280;
}

input:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-soft);
  background-color: rgba(15, 23, 42, 0.98);
}

/* Buttons */

button {
  margin-top: 6px;
  padding: 10px 16px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  background: linear-gradient(135deg, var(--accent), #1e3a8a);
  color: #020617;
  font-weight: 600;
  font-size: 0.98rem;
  letter-spacing: 0.01em;
  box-shadow: 0 10px 25px rgba(14, 165, 233, 0.45);
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    filter var(--transition-fast);
}

button:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
  box-shadow: 0 14px 35px rgba(14, 165, 233, 0.6);
}

button:active {
  transform: translateY(0);
  box-shadow: 0 8px 18px rgba(14, 165, 233, 0.4);
}

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

.url-actions button {
  flex: 1;
  margin-top: 0;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-soft);
  box-shadow: none;
}

.url-actions button:hover {
  border-color: var(--accent);
  color: var(--accent);
}


/* Status message */

.status-message {
  min-height: 1.1em;
  font-size: 0.82rem;
  margin: 6px 2px 0;
  color: var(--text-soft);
}

.status-message--error {
  color: var(--error);
}

/* Segments table */

.segments-table-container {
  max-height: 440px;
  overflow: auto;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: radial-gradient(
    circle at top left,
    #1e3a8a 0,
    #0b1120 45%,
    #020617 100%
  );
}

.segments-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.87rem;
}

.segment-check {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
}

.segment-check:checked ~ td {
  opacity: 0.6;
}

.segments-table thead {
  position: sticky;
  top: 0;
  background: rgba(10, 16, 32, 0.97);
  backdrop-filter: blur(10px);
}

.segments-table th,
.segments-table td {
  padding: 7px 10px;
  border-bottom: 1px solid #111827;
  text-align: left;
}

.segments-table th {
  font-weight: 600;
  color: var(--text-soft);
  font-size: 0.8rem;
}

.segments-empty {
  text-align: center;
  padding: 14px 8px;
  color: var(--text-soft);
  font-style: italic;
}

.segment-link {
  color: var(--accent);
  text-decoration: none;
  word-break: break-all;
}

.segment-link:hover {
  text-decoration: underline;
}

/* Player + overlay */

.player-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
}

#player {
  width: 100%;
  height: 100%;
}

#player-overlay {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: rgb(0, 0, 0);
  color: var(--text);
  padding: 16px;
  border-radius: 12px;
}