:root {
  color-scheme: light;
  --bg: #c5e7ff;
  --bg-accent: #bfe4ff;
  --surface: rgba(248, 252, 255, 0.88);
  --surface-strong: #fdfefe;
  --line: rgba(48, 112, 164, 0.18);
  --text: #17334d;
  --muted: #4d7596;
  --accent: #f2c230;
  --accent-strong: #dc9f0f;
  --shadow: 0 18px 60px rgba(54, 107, 154, 0.14);
  --radius-lg: 28px;
  --radius-md: 18px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Yu Gothic", "Hiragino Sans", sans-serif;
  color: var(--text);
  background: var(--bg);
}

.page-shell {
  width: min(1120px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 40px 0 64px;
}

.hero,
.controls-panel {
  border: 1px solid var(--line);
  background: var(--surface);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
}

.hero {
  padding: 32px;
  border-radius: var(--radius-lg);
}

.eyebrow {
  margin: 0 0 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  font-size: 0.8rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.3rem, 5vw, 4.4rem);
  line-height: 0.95;
}

.hero-copy {
  width: min(72ch, 100%);
  margin: 18px 0 0;
  color: var(--muted);
  line-height: 1.8;
  text-wrap: pretty;
}

.controls-panel {
  margin-top: 20px;
  padding: 24px;
  border-radius: var(--radius-lg);
}

.field-label,
.video-date,
.video-channel,
.status-text {
  color: var(--muted);
}

.search-form {
  display: grid;
  gap: 12px;
}

.field-row {
  display: flex;
  gap: 12px;
}

input,
button {
  min-height: 52px;
  border-radius: 999px;
  font: inherit;
}

input {
  flex: 1;
  border: 1px solid var(--line);
  background: var(--surface-strong);
  padding: 0 18px;
}

button {
  border: 0;
  padding: 0 22px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #463300;
  cursor: default;
}

button:not(:disabled) {
  cursor: pointer;
}

button:disabled {
  background: #b8cad8;
  color: rgba(23, 51, 77, 0.72);
  box-shadow: none;
  opacity: 0.85;
}

.results-list {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.video-title {
  margin: 0;
}

.video-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 12px;
  padding: 10px;
  border-radius: var(--radius-md);
  text-decoration: none;
  color: inherit;
  background: var(--surface-strong);
  border: 1px solid rgba(48, 112, 164, 0.12);
}

.video-thumb {
  width: 100%;
  height: 68px;
  object-fit: cover;
  border-radius: 12px;
  background: #cfe7f8;
}

.video-copy {
  display: grid;
  gap: 6px;
}

.video-meta-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.video-channel {
  margin: 0;
  font-size: 0.8rem;
}

.video-title {
  font-size: 0.95rem;
  line-height: 1.45;
}

.empty-state {
  margin: 0;
  padding: 18px;
  border-radius: 14px;
  background: rgba(243, 250, 255, 0.88);
  color: var(--muted);
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100vw - 20px, 100%);
    padding: 20px 0 40px;
  }

  .hero,
  .controls-panel {
    padding: 18px;
  }

  .field-row {
    grid-template-columns: 1fr;
    display: grid;
  }

  .video-item {
    grid-template-columns: 1fr;
  }

  .video-thumb {
    height: 180px;
  }
}