:root {
  color-scheme: light;
  --bg: #f6f7f9;
  --panel: #ffffff;
  --panel-soft: #eef3f2;
  --text: #1e2024;
  --muted: #666d76;
  --line: #d7dde3;
  --accent: #246b62;
  --accent-strong: #164b45;
  --danger: #a33b2f;
  --focus: #7d4c8d;
  --shadow: 0 12px 30px rgba(31, 44, 52, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

button,
input,
select {
  font: inherit;
}

button {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  padding: 8px 12px;
}

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

a {
  color: inherit;
}

button.primary,
.video-actions button:first-child,
.section-header button {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--focus) 36%, transparent);
  outline-offset: 2px;
}

.hidden {
  display: none !important;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  padding-bottom: env(safe-area-inset-bottom);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: calc(12px + env(safe-area-inset-top)) 16px 12px;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.topbar h1,
.section-header h2,
.player-meta h2 {
  margin: 0;
  line-height: 1.15;
}

.topbar h1 {
  font-size: 21px;
}

.topbar p,
.player-meta p,
.settings-status {
  margin: 4px 0 0;
  color: var(--muted);
}

.icon-button {
  width: 42px;
  padding: 0;
  font-size: 24px;
  font-weight: 600;
}

main {
  width: min(980px, 100%);
  margin: 0 auto;
  padding: 14px 14px 92px;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 8px 0 12px;
}

.section-header h2 {
  font-size: 22px;
}

.player-panel {
  overflow: hidden;
  margin-bottom: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.player-frame {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
}

video,
.youtube-player {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: #000;
}

.player-meta {
  display: grid;
  gap: 14px;
  padding: 14px;
}

.player-meta h2 {
  font-size: 18px;
}

.player-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.player-actions select {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 8px 10px;
}

.search-form,
.settings-form {
  display: grid;
  gap: 12px;
  margin-bottom: 14px;
}

.search-form {
  grid-template-columns: 1fr auto;
}

input[type="search"],
input[type="url"] {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  padding: 10px 12px;
}

.settings-form label {
  display: grid;
  gap: 6px;
}

.checkbox-row {
  grid-template-columns: auto 1fr;
  align-items: center;
}

.checkbox-row input {
  width: 22px;
  height: 22px;
}

.settings-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

#resetButton {
  color: var(--danger);
}

.video-list {
  display: grid;
  gap: 10px;
}

.video-card {
  display: grid;
  grid-template-columns: 126px 1fr;
  gap: 12px;
  min-height: 92px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.thumb-wrap {
  position: relative;
  overflow: hidden;
  width: 126px;
  aspect-ratio: 16 / 9;
  min-height: auto;
  border: 0;
  border-radius: 6px;
  background: var(--panel-soft);
  padding: 0;
  cursor: pointer;
}

.thumb-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.thumb-wrap:active {
  transform: none;
}

.thumb-wrap:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--focus) 42%, transparent);
  outline-offset: 2px;
}

.thumb-play {
  position: absolute;
  inset: 50% auto auto 50%;
  transform: translate(-50%, -50%);
  min-width: 46px;
  padding: 5px 8px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.72);
  color: #fff;
  font-size: 12px;
  font-weight: 800;
  line-height: 1;
}

.duration {
  position: absolute;
  right: 5px;
  bottom: 5px;
  padding: 2px 5px;
  border-radius: 4px;
  background: rgba(0, 0, 0, 0.75);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
}

.video-body {
  min-width: 0;
  display: grid;
  gap: 8px;
}

.video-title {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.25;
}

.title-play {
  min-height: auto;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--text);
  padding: 0;
  font: inherit;
  font-weight: inherit;
  text-align: left;
}

.title-play:active {
  transform: none;
}

.video-title a,
.video-meta a {
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.video-title a {
  color: var(--text);
}

.video-meta {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.video-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.video-actions button {
  min-height: 36px;
  padding: 6px 9px;
  font-size: 13px;
}

.button-link {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  padding: 6px 9px;
  font-size: 13px;
  text-decoration: none;
}

.empty-state {
  padding: 28px 18px;
  border: 1px dashed var(--line);
  border-radius: 8px;
  color: var(--muted);
  text-align: center;
  background: color-mix(in srgb, var(--panel) 60%, transparent);
}

.tabbar {
  position: fixed;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 6;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  padding: 8px 10px calc(8px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 94%, transparent);
  backdrop-filter: blur(18px);
}

.tab {
  border-color: transparent;
  background: transparent;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.tab.active {
  background: var(--panel-soft);
  color: var(--accent-strong);
}

@media (min-width: 760px) {
  .app-shell {
    grid-template-columns: 180px 1fr;
    grid-template-rows: auto 1fr;
  }

  .topbar {
    grid-column: 1 / -1;
  }

  main {
    padding-bottom: 28px;
  }

  .tabbar {
    position: sticky;
    top: 75px;
    align-self: start;
    grid-row: 2;
    grid-column: 1;
    display: grid;
    grid-template-columns: 1fr;
    height: calc(100vh - 75px);
    padding: 16px;
    border-top: 0;
    border-right: 1px solid var(--line);
    background: transparent;
  }

  .tab {
    text-align: left;
  }
}

@media (max-width: 430px) {
  main {
    padding-right: 10px;
    padding-left: 10px;
  }

  .video-card {
    grid-template-columns: 112px 1fr;
    gap: 10px;
  }

  .thumb-wrap {
    width: 112px;
  }

  .search-form {
    grid-template-columns: 1fr;
  }
}