:root {
  color-scheme: dark;
  --safe-x: 48px;
  --safe-y: 36px;
  --sidebar-width: 80px;
  --sidebar-expanded-width: 244px;
  --card-width: 304px;
  --card-thumbnail-height: 171px;
  --card-gap: 20px;
  --section-gap: 34px;
  --app-title-size: 32px;
  --section-title-size: 26px;
  --video-title-size: 19px;
  --secondary-text-size: 16px;
  --focus-color: #67e8f9;
  --accent: #fbbf24;
  --surface: #111d33;
  --surface-raised: #172641;
  --text: #f8fafc;
  --muted: #a9b7cc;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: #091224;
  color: #f8fafc;
  color: var(--text);
  font-family: Arial, "SamsungOne", sans-serif;
  -webkit-font-smoothing: antialiased;
}

body {
  min-width: 960px;
  min-height: 540px;
}

button,
input {
  font: inherit;
}

button {
  color: inherit;
}

button:focus,
input:focus {
  outline: none;
}

[hidden] {
  display: none !important;
}

.app-shell {
  position: relative;
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background:
    radial-gradient(circle at 82% 8%, rgba(22, 78, 99, 0.28), transparent 34%),
    linear-gradient(145deg, #091224 0%, #0c172b 62%, #071020 100%);
}

.sidebar {
  position: relative;
  z-index: 4;
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
  flex-direction: column;
  -webkit-box-flex: 0;
  -webkit-flex: 0 0 80px;
  flex: 0 0 80px;
  width: 80px;
  width: var(--sidebar-width);
  padding: 36px 10px;
  padding-top: var(--safe-y);
  padding-bottom: var(--safe-y);
  border-right: 1px solid rgba(148, 163, 184, 0.14);
  background: rgba(6, 15, 31, 0.9);
  overflow: hidden;
  -webkit-transition: width 140ms ease, flex-basis 140ms ease;
  transition: width 140ms ease, flex-basis 140ms ease;
}

.sidebar.sidebar-expanded {
  -webkit-flex-basis: 244px;
  flex-basis: 244px;
  -webkit-flex-basis: var(--sidebar-expanded-width);
  flex-basis: var(--sidebar-expanded-width);
  width: 244px;
  width: var(--sidebar-expanded-width);
}

.brand {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
  align-items: center;
  min-height: 54px;
  margin: 0 3px 34px;
  white-space: nowrap;
}

.brand-mark {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
  align-items: center;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  justify-content: center;
  -webkit-box-flex: 0;
  -webkit-flex: 0 0 48px;
  flex: 0 0 48px;
  width: 48px;
  height: 48px;
  border-radius: 15px;
  background: linear-gradient(145deg, #fbbf24, #f97316);
  box-shadow: 0 8px 24px rgba(249, 115, 22, 0.24);
  color: #152033;
  font-size: 28px;
  font-weight: 900;
}

.brand-name {
  margin-left: 15px;
  overflow: hidden;
  color: #fff7d6;
  font-size: 30px;
  font-size: var(--app-title-size);
  font-weight: 800;
  letter-spacing: -0.7px;
  opacity: 0;
  -webkit-transition: opacity 100ms linear;
  transition: opacity 100ms linear;
}

.sidebar-expanded .brand-name {
  opacity: 1;
}

.navigation {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
  flex-direction: column;
}

.nav-item {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
  align-items: center;
  width: 100%;
  min-height: 62px;
  margin-bottom: 13px;
  padding: 5px 8px;
  border: 3px solid transparent;
  border-radius: 16px;
  background: transparent;
  color: #a9b7cc;
  color: var(--muted);
  font-size: 21px;
  font-weight: 700;
  text-align: left;
  white-space: nowrap;
  overflow: hidden;
}

.nav-item span:last-child {
  margin-left: 13px;
  opacity: 0;
}

.sidebar-expanded .nav-item span:last-child {
  opacity: 1;
}

.nav-icon {
  display: inline-block;
  -webkit-box-flex: 0;
  -webkit-flex: 0 0 44px;
  flex: 0 0 44px;
  width: 44px;
  text-align: center;
  font-size: 32px;
  line-height: 44px;
}

.nav-item[aria-current="page"] {
  background: rgba(103, 232, 249, 0.11);
  color: #dffbff;
}

.nav-item:focus {
  border-color: #67e8f9;
  border-color: var(--focus-color);
  background: #172641;
  background: var(--surface-raised);
  color: #ffffff;
  box-shadow: 0 0 0 4px rgba(103, 232, 249, 0.17);
}

.sidebar-footer {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
  align-items: center;
  margin-top: auto;
  min-height: 32px;
  padding: 0 15px;
  color: #93a4bc;
  font-size: 15px;
  white-space: nowrap;
  overflow: hidden;
}

.connection-dot {
  display: inline-block;
  -webkit-box-flex: 0;
  -webkit-flex: 0 0 12px;
  flex: 0 0 12px;
  width: 12px;
  height: 12px;
  margin-right: 16px;
  border-radius: 50%;
  background: #fbbf24;
  box-shadow: 0 0 0 4px rgba(251, 191, 36, 0.14);
}

.connection-dot.online {
  background: #34d399;
  box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.14);
}

.connection-dot.offline {
  background: #fb7185;
  box-shadow: 0 0 0 4px rgba(251, 113, 133, 0.14);
}

.sidebar-footer span:last-child {
  opacity: 0;
}

.sidebar-expanded .sidebar-footer span:last-child {
  opacity: 1;
}

.screen {
  position: relative;
  z-index: 1;
  -webkit-box-flex: 1;
  -webkit-flex: 1 1 auto;
  flex: 1 1 auto;
  min-width: 0;
  height: 100%;
  overflow-x: hidden;
  overflow-y: auto;
  scrollbar-width: none;
}

.screen::-webkit-scrollbar,
.video-row::-webkit-scrollbar {
  display: none;
}

.screen-content {
  min-height: 100%;
  padding: 36px 48px 54px;
  padding: var(--safe-y) var(--safe-x) calc(var(--safe-y) + 18px);
}

.page-header {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-align: end;
  -webkit-align-items: flex-end;
  align-items: flex-end;
  -webkit-box-pack: justify;
  -webkit-justify-content: space-between;
  justify-content: space-between;
  min-height: 65px;
  margin-bottom: 29px;
}

.page-title {
  margin: 0;
  color: #ffffff;
  font-size: 36px;
  font-size: calc(var(--app-title-size) + 4px);
  line-height: 1.12;
  letter-spacing: -0.8px;
}

.page-subtitle {
  max-width: 680px;
  margin: 7px 0 0;
  color: #a9b7cc;
  color: var(--muted);
  font-size: 17px;
  font-size: var(--secondary-text-size);
  line-height: 1.4;
}

.usage-pill {
  display: inline-block;
  max-width: 410px;
  padding: 10px 16px;
  border: 1px solid rgba(148, 163, 184, 0.24);
  border-radius: 999px;
  background: rgba(17, 29, 51, 0.84);
  color: #dbeafe;
  font-size: 16px;
  font-size: var(--secondary-text-size);
  white-space: normal;
}

.content-section {
  margin-bottom: 34px;
  margin-bottom: var(--section-gap);
}

.section-heading {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
  align-items: center;
  margin: 0 0 16px;
  color: #edf7ff;
  font-size: 26px;
  font-size: var(--section-title-size);
  line-height: 1.22;
}

.section-count {
  margin-left: 12px;
  color: #8394ad;
  font-size: 16px;
  font-size: var(--secondary-text-size);
  font-weight: 500;
}

.video-row {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  width: 100%;
  padding: 5px 5px 17px;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-behavior: auto;
}

.video-card {
  position: relative;
  -webkit-box-flex: 0;
  -webkit-flex: 0 0 304px;
  flex: 0 0 304px;
  -webkit-flex-basis: var(--card-width);
  flex-basis: var(--card-width);
  width: 304px;
  width: var(--card-width);
  min-width: 0;
  margin-right: 20px;
  margin-right: var(--card-gap);
  padding: 0;
  border: 4px solid transparent;
  border-radius: 15px;
  background: transparent;
  text-align: left;
  overflow: hidden;
}

.video-card:last-child {
  margin-right: 0;
}

.video-card:focus {
  border-color: #67e8f9;
  border-color: var(--focus-color);
  background: #172641;
  background: var(--surface-raised);
  box-shadow: 0 0 0 4px rgba(103, 232, 249, 0.18), 0 16px 35px rgba(0, 0, 0, 0.34);
}

.thumbnail-wrap {
  position: relative;
  width: 100%;
  height: 171px;
  height: var(--card-thumbnail-height);
  overflow: hidden;
  border-radius: 10px;
  background: linear-gradient(135deg, #172641, #0f1b30);
}

.video-thumbnail {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  object-fit: cover;
  background: #111d33;
}

.duration-badge {
  position: absolute;
  right: 8px;
  bottom: 8px;
  padding: 4px 7px;
  border-radius: 6px;
  background: rgba(3, 8, 18, 0.86);
  color: #ffffff;
  font-size: 14px;
  font-weight: 700;
}

.progress-track {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 6px;
  background: rgba(255, 255, 255, 0.24);
}

.progress-value {
  display: block;
  height: 100%;
  background: #fbbf24;
  background: var(--accent);
}

.video-copy {
  min-height: 70px;
  padding: 11px 8px 7px;
}

.video-title {
  display: -webkit-box;
  min-width: 0;
  margin: 0;
  overflow: hidden;
  color: #f8fafc;
  font-size: 19px;
  font-size: var(--video-title-size);
  font-weight: 700;
  line-height: 1.28;
  overflow-wrap: anywhere;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.video-channel {
  margin: 7px 0 0;
  overflow: hidden;
  color: #a9b7cc;
  color: var(--muted);
  font-size: 16px;
  font-size: var(--secondary-text-size);
  line-height: 1.25;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.more-card-visual {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
  align-items: center;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  justify-content: center;
  background: linear-gradient(145deg, #172641, #20395c);
}

.more-card-symbol {
  display: inline-block;
  color: #67e8f9;
  color: var(--focus-color);
  font-size: 62px;
  font-weight: 300;
  line-height: 1;
}

.thumbnail-error {
  background: linear-gradient(145deg, #172641, #0f1b30);
}

.search-form {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  width: 100%;
  max-width: 950px;
  margin: 0 0 32px;
}

.search-input {
  -webkit-box-flex: 1;
  -webkit-flex: 1 1 auto;
  flex: 1 1 auto;
  min-width: 0;
  height: 66px;
  padding: 0 22px;
  border: 4px solid transparent;
  border-radius: 16px 0 0 16px;
  background: #172641;
  color: #ffffff;
  font-size: 24px;
  line-height: 58px;
}

.search-input::-webkit-input-placeholder {
  color: #8191aa;
}

.search-input:focus {
  border-color: #67e8f9;
  border-color: var(--focus-color);
  box-shadow: 0 0 0 4px rgba(103, 232, 249, 0.17);
}

.primary-button,
.secondary-button,
.search-button,
.player-back {
  min-height: 58px;
  padding: 0 24px;
  border: 4px solid transparent;
  border-radius: 15px;
  font-weight: 800;
}

.search-button {
  -webkit-box-flex: 0;
  -webkit-flex: 0 0 auto;
  flex: 0 0 auto;
  height: 66px;
  border-radius: 0 16px 16px 0;
  background: #fbbf24;
  background: var(--accent);
  color: #152033;
  font-size: 22px;
}

.primary-button {
  background: #fbbf24;
  background: var(--accent);
  color: #152033;
  font-size: 21px;
}

.secondary-button,
.player-back {
  background: #172641;
  background: var(--surface-raised);
  color: #eef8ff;
  font-size: 20px;
}

.primary-button:focus,
.secondary-button:focus,
.search-button:focus,
.player-back:focus {
  border-color: #67e8f9;
  border-color: var(--focus-color);
  box-shadow: 0 0 0 4px rgba(103, 232, 249, 0.2);
}

.center-state,
.pairing-screen {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
  flex-direction: column;
  -webkit-box-align: center;
  -webkit-align-items: center;
  align-items: center;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  justify-content: center;
  min-height: calc(100vh - 90px);
  padding: 36px;
  text-align: center;
}

.pairing-panel,
.state-panel {
  width: 100%;
  max-width: 760px;
  padding: 38px 48px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 28px;
  background: rgba(17, 29, 51, 0.92);
  box-shadow: 0 26px 70px rgba(0, 0, 0, 0.3);
}

.pairing-title,
.state-title {
  margin: 0;
  color: #ffffff;
  font-size: 36px;
  font-size: calc(var(--app-title-size) + 4px);
  line-height: 1.2;
}

.pairing-description,
.state-message {
  max-width: 660px;
  margin: 15px auto 0;
  color: #b6c4d7;
  font-size: 20px;
  font-size: calc(var(--secondary-text-size) + 4px);
  line-height: 1.48;
  word-wrap: break-word;
  overflow-wrap: break-word;
  overflow-wrap: anywhere;
}

.pairing-code {
  margin: 28px 0;
  color: #fbbf24;
  color: var(--accent);
  font-size: 76px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: 15px;
  text-indent: 15px;
  text-shadow: 0 7px 25px rgba(251, 191, 36, 0.2);
}

.pairing-status {
  min-height: 28px;
  margin: 15px 0 22px;
  color: #a9b7cc;
  color: var(--muted);
  font-size: 18px;
}

.button-row {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  justify-content: center;
  margin-top: 26px;
}

.button-row button + button {
  margin-left: 16px;
}

.spinner {
  width: 50px;
  height: 50px;
  margin: 0 auto 22px;
  border: 6px solid rgba(103, 232, 249, 0.16);
  border-top-color: #67e8f9;
  border-radius: 50%;
  -webkit-animation: spin 900ms linear infinite;
  animation: spin 900ms linear infinite;
}

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

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

.secondary-text {
  color: #a9b7cc;
  color: var(--muted);
  font-size: 16px;
  font-size: var(--secondary-text-size);
}

.policy-overlay {
  position: absolute;
  z-index: 30;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
  align-items: center;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  justify-content: center;
  padding: 60px;
  background: rgba(5, 12, 25, 0.96);
}

.policy-card {
  max-width: 760px;
  text-align: center;
}

.policy-icon {
  display: block;
  margin-bottom: 19px;
  color: #fbbf24;
  color: var(--accent);
  font-size: 78px;
}

.policy-card h1 {
  margin: 0;
  font-size: 42px;
  line-height: 1.2;
}

.policy-card p {
  margin: 18px 0 0;
  color: #c7d5e7;
  font-size: 23px;
  line-height: 1.45;
}

.toast {
  position: absolute;
  z-index: 60;
  right: 48px;
  right: var(--safe-x);
  bottom: 36px;
  bottom: var(--safe-y);
  max-width: 620px;
  padding: 16px 22px;
  border: 1px solid rgba(103, 232, 249, 0.32);
  border-radius: 14px;
  background: #172641;
  color: #ffffff;
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.4);
  font-size: 18px;
  line-height: 1.4;
  overflow-wrap: anywhere;
}

.toast.error {
  border-color: rgba(251, 113, 133, 0.5);
  background: #3b1726;
}

.player-overlay {
  position: absolute;
  z-index: 20;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  overflow: hidden;
  background: #000000;
}

.player-frame {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: #000000;
}

.player-hud {
  position: absolute;
  z-index: 2;
  top: 0;
  right: 0;
  left: 0;
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
  align-items: center;
  padding: 22px 48px 48px;
  padding-left: var(--safe-x);
  padding-right: var(--safe-x);
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.88), rgba(0, 0, 0, 0));
  opacity: 0.2;
  -webkit-transition: opacity 120ms linear;
  transition: opacity 120ms linear;
}

.player-overlay.hud-visible .player-hud,
.player-hud:focus-within {
  opacity: 1;
}

.player-back {
  -webkit-box-flex: 0;
  -webkit-flex: 0 0 auto;
  flex: 0 0 auto;
  min-height: 55px;
  background: rgba(15, 27, 48, 0.9);
}

.player-meta {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
  flex-direction: column;
  min-width: 0;
  margin-left: 23px;
}

.player-meta strong {
  overflow: hidden;
  font-size: 23px;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.player-meta span {
  margin-top: 5px;
  color: #cbd5e1;
  font-size: 16px;
}

@media (max-height: 620px) {
  .screen-content {
    padding-top: 24px;
    padding-bottom: 28px;
  }

  .page-header {
    margin-bottom: 20px;
  }

  .content-section {
    margin-bottom: 24px;
  }

  .video-copy {
    min-height: 60px;
  }

  .pairing-panel,
  .state-panel {
    padding-top: 25px;
    padding-bottom: 25px;
  }

  .pairing-code {
    margin-top: 21px;
    margin-bottom: 21px;
    font-size: 64px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    -webkit-transition-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    -webkit-animation-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    -webkit-animation-iteration-count: 1 !important;
    animation-iteration-count: 1 !important;
  }
}