/* ============================================
   YouTube Clone - Stylesheet
   All theme/layout controlled via CSS variables
   ============================================ */

:root {
  /* 색상 (다크 기본) */
  --color-bg: #0f0f0f;
  --color-bg-elevated: #1f1f1f;
  --color-bg-hover: #272727;
  --color-card-bg: #272727;
  --color-text: #ffffff;
  --color-text-muted: #aaaaaa;
  --color-text-secondary: #cccccc;
  --color-border: #303030;
  --color-primary: #ff0000;
  --color-accent: #3ea6ff;
  --color-danger: #ff4444;
  --color-success: #00c853;

  /* 크기/간격 (스케일 가능) */
  --font-scale: 1;
  --spacing-scale: 1;
  --border-radius: 12px;
  --border-radius-sm: 8px;

  /* 사이드바 */
  --sidebar-width: 240px;
  --sidebar-position: left;

  /* 그리드 */
  --grid-columns: 3;

  /* 타이포그래피 */
  --font-family: system-ui, -apple-system, sans-serif;
  --title-weight: 600;

  /* 헤더 */
  --header-height: 56px;

  /* 트랜지션 */
  --transition-speed: 0.2s;
}

/* ============= Light Theme ============= */
body[data-theme="light"] {
  --color-bg: #ffffff;
  --color-bg-elevated: #f9f9f9;
  --color-bg-hover: #f2f2f2;
  --color-card-bg: #f9f9f9;
  --color-text: #0f0f0f;
  --color-text-muted: #606060;
  --color-text-secondary: #303030;
  --color-border: #e5e5e5;
  --color-primary: #ff0000;
  --color-accent: #065fd4;
}

/* ============= Custom Theme (사용자 색상) ============= */
body[data-theme="custom"] {
  --color-bg: var(--custom-bg, #0f0f0f);
  --color-bg-elevated: var(--custom-bg-elevated, #1f1f1f);
  --color-bg-hover: var(--custom-bg-hover, #272727);
  --color-card-bg: var(--custom-card-bg, #272727);
  --color-text: var(--custom-text, #ffffff);
  --color-text-muted: var(--custom-text-muted, #aaaaaa);
  --color-border: var(--custom-border, #303030);
  --color-primary: var(--custom-primary, #ff0000);
}

/* ============= Reset ============= */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: calc(14px * var(--font-scale));
  overflow: hidden;
  transition: background var(--transition-speed), color var(--transition-speed);
}

body.no-animations * {
  transition: none !important;
  animation: none !important;
}

button { cursor: pointer; font-family: inherit; }
a { text-decoration: none; color: inherit; }
input, select, textarea { font-family: inherit; font-size: inherit; }

/* ============= Header ============= */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-height);
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 calc(16px * var(--spacing-scale));
  z-index: 100;
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition-speed);
}

body.no-header .header { display: none; }

.header-left { display: flex; align-items: center; gap: calc(16px * var(--spacing-scale)); }
.header-center { display: flex; align-items: center; flex: 0 1 720px; gap: calc(8px * var(--spacing-scale)); }
.header-right { display: flex; align-items: center; gap: calc(8px * var(--spacing-scale)); }

.logo {
  display: flex;
  align-items: center;
  gap: 4px;
  font-weight: 700;
  font-size: calc(20px * var(--font-scale));
  letter-spacing: -0.5px;
}
.logo-icon svg { display: block; }
.logo-text { color: var(--color-text); }
body[data-theme="dark"] .logo-text,
body[data-theme="custom"] .logo-text { color: var(--color-text); }

.icon-btn {
  background: transparent;
  border: none;
  color: var(--color-text);
  width: 40px; height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-speed);
}
.icon-btn:hover { background: var(--color-bg-hover); }
.icon-btn.active { background: var(--color-bg-hover); color: var(--color-primary); }

.search-bar {
  flex: 1;
  display: flex;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: calc(var(--border-radius-sm) * 1.5);
  overflow: hidden;
  background: var(--color-bg-elevated);
}
.search-bar input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  color: var(--color-text);
  padding: 0 calc(16px * var(--spacing-scale));
  font-size: calc(16px * var(--font-scale));
}
.search-bar input::placeholder { color: var(--color-text-muted); }
.search-btn {
  background: var(--color-bg-hover);
  border: none;
  border-left: 1px solid var(--color-border);
  color: var(--color-text);
  width: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.search-btn:hover { background: var(--color-border); }

/* ============= Search Autocomplete ============= */
.search-suggest {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  max-height: 480px;
  overflow-y: auto;
  z-index: 110;
  display: none;
  padding: calc(8px * var(--spacing-scale)) 0;
}
.search-suggest.open { display: block; }
.suggest-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: calc(6px * var(--spacing-scale)) calc(16px * var(--spacing-scale));
  font-size: calc(12px * var(--font-scale));
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}
.suggest-header button {
  background: transparent;
  border: none;
  color: var(--color-accent);
  font-size: calc(11px * var(--font-scale));
  cursor: pointer;
  text-transform: none;
  letter-spacing: 0;
  font-weight: 500;
}
.suggest-header button:hover { text-decoration: underline; }
.suggest-item {
  display: flex;
  align-items: center;
  gap: calc(12px * var(--spacing-scale));
  padding: calc(8px * var(--spacing-scale)) calc(16px * var(--spacing-scale));
  cursor: pointer;
  font-size: calc(14px * var(--font-scale));
  transition: background var(--transition-speed);
}
.suggest-item:hover, .suggest-item.active {
  background: var(--color-bg-hover);
}
.suggest-item .suggest-icon {
  display: flex;
  align-items: center;
  color: var(--color-text-muted);
  flex-shrink: 0;
}
.suggest-item .suggest-label {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.suggest-item .suggest-label strong {
  color: var(--color-text);
  font-weight: 700;
}
.suggest-item .suggest-remove {
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  opacity: 0;
  transition: opacity var(--transition-speed), background var(--transition-speed);
}
.suggest-item:hover .suggest-remove { opacity: 1; }
.suggest-item .suggest-remove:hover {
  background: var(--color-border);
  color: var(--color-text);
}
body.no-animations .suggest-item { transition: none; }

.search-bar { position: relative; }

.voice-btn {
  background: var(--color-bg-hover);
  border: none;
}

/* ============= Sidebar ============= */
.sidebar {
  position: fixed;
  top: var(--header-height);
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--color-bg);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  padding: calc(12px * var(--spacing-scale)) 0;
  z-index: 90;
  transition: transform var(--transition-speed), width var(--transition-speed);
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

.sidebar::-webkit-scrollbar { width: 8px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 4px; }

body[data-sidebar-pos="right"] .sidebar {
  left: auto;
  right: 0;
  border-right: none;
  border-left: 1px solid var(--color-border);
}

body[data-sidebar-pos="hidden"] .sidebar {
  transform: translateX(-100%);
}
body[data-sidebar-pos="hidden"][data-sidebar-pos="right"] .sidebar {
  transform: translateX(100%);
}

body[data-sidebar-pos="hidden"].sidebar-open .sidebar {
  transform: translateX(0);
}

body.no-sidebar .sidebar { display: none; }

body[data-sidebar-width="compact"] { --sidebar-width: 72px; }
body[data-sidebar-width="wide"] { --sidebar-width: 280px; }

body[data-sidebar-width="compact"] .nav-item span,
body[data-sidebar-width="compact"] .sidebar-title,
body[data-sidebar-width="compact"] .sidebar-footer,
body[data-sidebar-width="compact"] .sidebar-divider {
  display: none;
}
body[data-sidebar-width="compact"] .nav-item {
  flex-direction: column;
  padding: calc(12px * var(--spacing-scale)) calc(4px * var(--spacing-scale));
  font-size: calc(10px * var(--font-scale));
  text-align: center;
}
body[data-sidebar-width="compact"] .nav-item svg { margin: 0; }

.sidebar-section {
  display: flex;
  flex-direction: column;
  padding: 0 calc(12px * var(--spacing-scale));
}
.nav-item {
  display: flex;
  align-items: center;
  gap: calc(24px * var(--spacing-scale));
  padding: calc(8px * var(--spacing-scale)) calc(12px * var(--spacing-scale));
  border-radius: var(--border-radius-sm);
  font-size: calc(14px * var(--font-scale));
  color: var(--color-text);
  transition: background var(--transition-speed);
}
.nav-item:hover { background: var(--color-bg-hover); }
.nav-item.active { background: var(--color-bg-hover); font-weight: 600; }
.nav-item svg { flex-shrink: 0; }

.sidebar-divider {
  height: 1px;
  background: var(--color-border);
  margin: calc(12px * var(--spacing-scale)) calc(12px * var(--spacing-scale));
}
.sidebar-title {
  padding: calc(8px * var(--spacing-scale)) calc(24px * var(--spacing-scale));
  font-size: calc(16px * var(--font-scale));
  font-weight: 600;
}
.sidebar-footer {
  padding: calc(16px * var(--spacing-scale));
  font-size: calc(12px * var(--font-scale));
  color: var(--color-text-muted);
}

/* ============= Main ============= */
.main {
  position: fixed;
  top: var(--header-height);
  left: var(--sidebar-width);
  right: 0;
  bottom: 0;
  overflow-y: auto;
  padding: calc(16px * var(--spacing-scale));
  transition: left var(--transition-speed), right var(--transition-speed);
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

body[data-sidebar-pos="right"] .main {
  left: 0;
  right: var(--sidebar-width);
}
body[data-sidebar-pos="hidden"] .main {
  left: 0;
  right: 0;
}

.main::-webkit-scrollbar { width: 10px; }
.main::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 5px; }

/* ============= Filter Bar ============= */
.filter-bar {
  display: flex;
  gap: calc(12px * var(--spacing-scale));
  margin-bottom: calc(16px * var(--spacing-scale));
  overflow-x: auto;
  padding-bottom: calc(8px * var(--spacing-scale));
}
.filter-bar::-webkit-scrollbar { height: 0; }

body.no-filterbar .filter-bar { display: none; }

.chip {
  background: var(--color-bg-hover);
  color: var(--color-text);
  border: none;
  padding: calc(8px * var(--spacing-scale)) calc(16px * var(--spacing-scale));
  border-radius: calc(var(--border-radius-sm) * 1.5);
  white-space: nowrap;
  font-size: calc(14px * var(--font-scale));
  transition: background var(--transition-speed);
}
.chip:hover { background: var(--color-border); }
.chip.active {
  background: var(--color-text);
  color: var(--color-bg);
}

/* ============= Video Grid ============= */
.content {
  display: grid;
  grid-template-columns: repeat(var(--grid-columns), 1fr);
  gap: calc(20px * var(--spacing-scale)) calc(16px * var(--spacing-scale));
}

body[data-card-style="compact"] .content { gap: calc(12px * var(--spacing-scale)); }
body[data-card-style="spacious"] .content {
  gap: calc(40px * var(--spacing-scale)) calc(24px * var(--spacing-scale));
  max-width: 1600px;
}
body[data-card-style="spacious"] .video-thumb {
  border-radius: calc(var(--border-radius) * 1.25);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}
body[data-card-style="spacious"] .video-card:hover .video-thumb {
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

body[data-grid="2"] .content { grid-template-columns: repeat(2, 1fr); }
body[data-grid="3"] .content { grid-template-columns: repeat(3, 1fr); }
body[data-grid="4"] .content { grid-template-columns: repeat(4, 1fr); }
body[data-grid="5"] .content { grid-template-columns: repeat(5, 1fr); }
body[data-grid="6"] .content { grid-template-columns: repeat(6, 1fr); }

body.compact-mode .content {
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
}

@media (max-width: 1400px) { .content { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 1100px) { .content { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 700px)  { .content { grid-template-columns: 1fr; } }

/* ============= Video Card ============= */
.video-card {
  display: flex;
  flex-direction: column;
  cursor: pointer;
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: transform var(--transition-speed);
}
.video-card:hover { transform: translateY(-2px); }

.video-thumb {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  background: #000;
  border-radius: var(--border-radius);
  overflow: hidden;
}

/* Shorts 카드 - 세로 (9:16) */
.content.shorts-mode .video-card { max-width: 220px; margin: 0 auto; }
.content.shorts-mode .video-thumb {
  aspect-ratio: 9/16;
  max-height: 380px;
  background: #000;
}
.content.shorts-mode .video-info {
  text-align: center;
  padding: calc(8px * var(--spacing-scale)) 0;
}
.content.shorts-mode .video-stats { font-size: calc(11px * var(--font-scale)); }

/* Shorts 풀스크린 플레이어 - 모바일 세로 가득 채움 */
.shorts-player {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh; /* 모바일 동적 뷰포트 높이 */
  background: #000;
  z-index: 400;
  display: flex;
  align-items: stretch;
  justify-content: center;
  overflow: hidden;
}
.shorts-player iframe {
  width: 100% !important;
  height: 100% !important;
  max-width: none !important;
  max-height: none !important;
  border: 0;
  object-fit: contain;
  position: absolute;
  inset: 0;
}
/* Shorts 닫기 버튼 - 상단 안전영역 */
.shorts-player .shorts-close {
  position: fixed;
  top: calc(16px + env(safe-area-inset-top, 0px));
  left: 16px;
  background: rgba(0,0,0,0.5);
  color: #fff;
  border: none;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 22px;
  cursor: pointer;
  z-index: 10;
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.video-duration {
  position: absolute;
  bottom: calc(8px * var(--spacing-scale));
  right: calc(8px * var(--spacing-scale));
  background: rgba(0, 0, 0, 0.85);
  color: #fff;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: calc(12px * var(--font-scale));
  font-weight: 600;
}
body.no-duration .video-duration { display: none; }

.video-info {
  display: flex;
  gap: calc(12px * var(--spacing-scale));
  padding: calc(12px * var(--spacing-scale)) calc(4px * var(--spacing-scale));
}

body[data-card-style="compact"] .video-info { padding: calc(8px * var(--spacing-scale)) 0; gap: calc(8px * var(--spacing-scale)); }
body[data-card-style="spacious"] .video-info { padding: calc(16px * var(--spacing-scale)) 0; gap: calc(16px * var(--spacing-scale)); }

.channel-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-bg-hover);
  flex-shrink: 0;
  overflow: hidden;
}
body[data-card-style="compact"] .channel-avatar { width: 28px; height: 28px; }
.channel-avatar img { width: 100%; height: 100%; object-fit: cover; }
body.no-channel-avatar .channel-avatar { display: none; }

.video-meta {
  flex: 1;
  min-width: 0;
}
.video-title {
  font-size: calc(15px * var(--font-scale));
  font-weight: var(--title-weight);
  line-height: 1.4;
  color: var(--color-text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: calc(4px * var(--spacing-scale));
}
body[data-card-style="compact"] .video-title { font-size: calc(13px * var(--font-scale)); -webkit-line-clamp: 1; }

.video-channel {
  font-size: calc(13px * var(--font-scale));
  color: var(--color-text-muted);
  margin-bottom: 2px;
  transition: color var(--transition-speed);
}
.video-channel:hover { color: var(--color-text); }
body.no-channel-name .video-channel { display: none; }

.video-stats {
  font-size: calc(12px * var(--font-scale));
  color: var(--color-text-muted);
}
body.no-viewcount .video-stats .view-count { display: none; }
body.no-uploaddate .video-stats .upload-date { display: none; }

.video-description {
  font-size: calc(12px * var(--font-scale));
  color: var(--color-text-muted);
  margin-top: calc(4px * var(--spacing-scale));
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
body.no-description .video-description { display: none; }

/* ============= Resume Banner ============= */
.resume-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: calc(16px * var(--spacing-scale));
  background: linear-gradient(135deg, var(--color-card-bg), var(--color-bg-elevated));
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--border-radius);
  padding: calc(12px * var(--spacing-scale)) calc(16px * var(--spacing-scale));
  animation: slideDown 0.3s ease-out;
}
body.no-animations .resume-banner { animation: none; }
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}
.resume-info {
  display: flex;
  align-items: center;
  gap: calc(8px * var(--spacing-scale));
  font-size: calc(14px * var(--font-scale));
  color: var(--color-text);
}
.resume-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  font-size: 12px;
}
.resume-info strong {
  color: var(--color-primary);
  font-weight: 700;
}
.resume-actions {
  display: flex;
  gap: calc(8px * var(--spacing-scale));
}
.resume-actions .btn-primary,
.resume-actions .btn-secondary {
  padding: calc(6px * var(--spacing-scale)) calc(14px * var(--spacing-scale));
  font-size: calc(13px * var(--font-scale));
}

/* 비디오 카드에 진행률 바 */
.video-progress-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(255, 255, 255, 0.2);
  z-index: 2;
}
.video-progress-fill {
  height: 100%;
  background: var(--color-primary);
  transition: width 0.3s;
}
body.no-animations .video-progress-fill { transition: none; }

/* 진행도 뱃지 (썸네일 위) */
.video-progress-badge {
  position: absolute;
  bottom: calc(28px * var(--spacing-scale));
  left: calc(8px * var(--spacing-scale));
  background: rgba(0, 0, 0, 0.85);
  color: #fff;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: calc(11px * var(--font-scale));
  font-weight: 600;
}

/* ============= API Key Actions ============= */
.api-key-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 8px;
}
.api-key-actions .btn-text {
  font-size: calc(11px * var(--font-scale));
  padding: 4px 8px;
}

/* ============= Version Info ============= */
.version-section {
  background: var(--color-bg-elevated);
  margin: 0 calc(-16px * var(--spacing-scale)) calc(-16px * var(--spacing-scale));
  padding: calc(16px * var(--spacing-scale)) calc(16px * var(--spacing-scale)) calc(20px * var(--spacing-scale)) !important;
  border-top: 1px solid var(--color-border);
  border-bottom: none !important;
}
.version-info {
  font-size: calc(13px * var(--font-scale));
  color: var(--color-text-secondary);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.version-info div { display: flex; justify-content: space-between; gap: 12px; }
.version-info strong { color: var(--color-text-muted); font-weight: 500; }
.version-info a { color: var(--color-accent); text-decoration: none; word-break: break-all; font-size: calc(12px * var(--font-scale)); }
.version-info a:hover { text-decoration: underline; }
.version-actions {
  display: flex;
  gap: 8px;
  margin-top: 8px;
  flex-direction: row !important;
  justify-content: flex-start !important;
}

/* ============= Sort Bar (YouTube-style) ============= */
.sort-bar {
  display: flex;
  gap: calc(8px * var(--spacing-scale));
  padding: calc(8px * var(--spacing-scale)) 0 calc(12px * var(--spacing-scale));
  border-bottom: 1px solid var(--color-border);
  margin-bottom: calc(16px * var(--spacing-scale));
  grid-column: 1 / -1;
  overflow-x: auto;
  scrollbar-width: none;
}
.sort-bar::-webkit-scrollbar { display: none; }
.sort-chip {
  background: var(--color-bg-hover);
  color: var(--color-text);
  border: 1px solid transparent;
  padding: calc(6px * var(--spacing-scale)) calc(14px * var(--spacing-scale));
  border-radius: 16px;
  white-space: nowrap;
  font-size: calc(13px * var(--font-scale));
  cursor: pointer;
  font-family: inherit;
  transition: background var(--transition-speed), border-color var(--transition-speed);
}
.sort-chip:hover { background: var(--color-border); }
.sort-chip.active {
  background: var(--color-text);
  color: var(--color-bg);
  font-weight: 600;
}

/* ============= API Key Save Indicator ============= */
#apiKeyStatus {
  font-size: calc(11px * var(--font-scale));
  margin-top: 4px;
  display: block;
  min-height: 16px;
  transition: opacity 0.3s;
}
#apiKeyStatus.saved { color: var(--color-success); }
#apiKeyStatus.empty { color: var(--color-text-muted); }

/* ============== Search Result Header (단순화) ============== */
.search-result-header {
  padding: calc(4px * var(--spacing-scale)) 0 calc(8px * var(--spacing-scale));
  grid-column: 1 / -1;
}
.result-title {
  font-size: calc(20px * var(--font-scale));
  font-weight: 700;
  color: var(--color-text);
  word-break: break-word;
}
.result-subtitle {
  font-size: calc(12px * var(--font-scale));
  color: var(--color-text-muted);
  margin-top: 2px;
}
@media (max-width: 700px) {
  .result-title { font-size: calc(17px * var(--font-scale)); }
}

/* ============= Player View ============= */
.player-view {
  display: flex;
  flex-direction: column;
  gap: calc(16px * var(--spacing-scale));
  max-width: 1600px;
  margin: 0 auto;
}

.player-wrapper {
  width: 100%;
  background: #000;
  border-radius: var(--border-radius);
  overflow: hidden;
  position: relative; /* iframe absolute 기준점 */
  isolation: isolate; /* z-index 격리 */
  contain: layout style; /* 레이아웃 격리 */
}
.player-wrapper iframe {
  width: 100% !important;
  height: auto !important;
  aspect-ratio: 16/9;
  display: block;
  border: 0;
  position: relative !important; /* absolute 대신 relative로 */
  top: auto !important;
  left: auto !important;
}

body[data-player-size="small"] .player-wrapper { max-width: 720px; margin: 0 auto; }
body[data-player-size="medium"] .player-wrapper { max-width: 1000px; margin: 0 auto; }
body[data-player-size="large"] .player-wrapper { max-width: 1400px; margin: 0 auto; }
body[data-player-size="full"] .player-wrapper { max-width: 100%; }

.player-meta {
  display: flex;
  flex-direction: column;
  gap: calc(8px * var(--spacing-scale));
}
.player-title {
  font-size: calc(20px * var(--font-scale));
  font-weight: var(--title-weight);
}
.player-channel {
  display: flex;
  align-items: center;
  gap: calc(12px * var(--spacing-scale));
  color: var(--color-text-muted);
  font-size: calc(14px * var(--font-scale));
}

.player-actions {
  display: flex;
  gap: calc(8px * var(--spacing-scale));
  flex-wrap: wrap;
}
.action-btn {
  background: var(--color-bg-hover);
  border: none;
  color: var(--color-text);
  padding: calc(8px * var(--spacing-scale)) calc(16px * var(--spacing-scale));
  border-radius: calc(var(--border-radius-sm) * 1.5);
  font-size: calc(14px * var(--font-scale));
  display: flex;
  align-items: center;
  gap: 6px;
  transition: background var(--transition-speed);
}
.action-btn:hover { background: var(--color-border); }
.action-btn.active { background: var(--color-primary); color: #fff; }

.back-btn {
  background: var(--color-bg-hover);
  border: none;
  color: var(--color-text);
  padding: calc(8px * var(--spacing-scale)) calc(16px * var(--spacing-scale));
  border-radius: var(--border-radius-sm);
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: calc(14px * var(--font-scale));
}

/* ============= Welcome ============= */
.welcome {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
}
.welcome-card {
  background: var(--color-card-bg);
  padding: calc(40px * var(--spacing-scale));
  border-radius: var(--border-radius);
  max-width: 600px;
  text-align: center;
  border: 1px solid var(--color-border);
}
.welcome-card h1 {
  font-size: calc(32px * var(--font-scale));
  margin-bottom: calc(16px * var(--spacing-scale));
}
.welcome-card p { margin-bottom: calc(8px * var(--spacing-scale)); color: var(--color-text-secondary); }
.welcome-card .muted { color: var(--color-text-muted); font-size: calc(13px * var(--font-scale)); }
.welcome-actions {
  display: flex;
  gap: calc(12px * var(--spacing-scale));
  justify-content: center;
  margin: calc(24px * var(--spacing-scale)) 0;
}
.welcome-tips {
  text-align: left;
  margin-top: calc(32px * var(--spacing-scale));
  padding-top: calc(24px * var(--spacing-scale));
  border-top: 1px solid var(--color-border);
}
.welcome-tips h3 { margin-bottom: calc(12px * var(--spacing-scale)); }
.welcome-tips ol { padding-left: 20px; color: var(--color-text-secondary); }
.welcome-tips li { margin-bottom: calc(8px * var(--spacing-scale)); }
.welcome-tips a { color: var(--color-accent); text-decoration: underline; }

/* ============= Buttons ============= */
.btn-primary, .btn-secondary, .btn-danger, .btn-text {
  border: none;
  border-radius: var(--border-radius-sm);
  padding: calc(10px * var(--spacing-scale)) calc(20px * var(--spacing-scale));
  font-size: calc(14px * var(--font-scale));
  font-weight: 600;
  transition: background var(--transition-speed), opacity var(--transition-speed);
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { opacity: 0.9; }
.btn-secondary { background: var(--color-bg-hover); color: var(--color-text); }
.btn-secondary:hover { background: var(--color-border); }
.btn-danger { background: var(--color-danger); color: #fff; }
.btn-danger:hover { opacity: 0.9; }
.btn-text { background: transparent; color: var(--color-accent); padding: calc(6px * var(--spacing-scale)) calc(12px * var(--spacing-scale)); }
.btn-text:hover { text-decoration: underline; }

/* ============= Settings Panel ============= */
.settings-panel, .history-panel, .subs-panel {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 380px;
  max-width: 90vw;
  background: var(--color-bg);
  border-left: 1px solid var(--color-border);
  z-index: 200;
  transform: translateX(100%);
  transition: transform var(--transition-speed);
  display: flex;
  flex-direction: column;
}
.settings-panel.open, .history-panel.open, .subs-panel.open {
  transform: translateX(0);
  box-shadow: -4px 0 16px rgba(0, 0, 0, 0.3);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: calc(16px * var(--spacing-scale));
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}
.panel-header h2 {
  font-size: calc(18px * var(--font-scale));
  font-weight: 600;
}

.panel-body {
  flex: 1;
  overflow-y: auto;
  padding: calc(16px * var(--spacing-scale));
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}
.panel-body::-webkit-scrollbar { width: 8px; }
.panel-body::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 4px; }

.panel-footer {
  padding: calc(12px * var(--spacing-scale));
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.settings-section {
  margin-bottom: calc(24px * var(--spacing-scale));
  padding-bottom: calc(16px * var(--spacing-scale));
  border-bottom: 1px solid var(--color-border);
}
.settings-section:last-child { border-bottom: none; }
.settings-section h3 {
  font-size: calc(14px * var(--font-scale));
  font-weight: 600;
  margin-bottom: calc(12px * var(--spacing-scale));
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.setting-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: calc(14px * var(--spacing-scale));
}
.setting-row label {
  font-size: calc(13px * var(--font-scale));
  color: var(--color-text-secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.setting-row input[type="text"],
.setting-row input[type="password"],
.setting-row select,
.setting-row textarea {
  width: 100%;
  padding: calc(8px * var(--spacing-scale)) calc(12px * var(--spacing-scale));
  background: var(--color-bg-elevated);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  font-size: calc(14px * var(--font-scale));
}
.setting-row input[type="text"]:focus,
.setting-row input[type="password"]:focus,
.setting-row select:focus,
.setting-row textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}
.setting-row input[type="color"] {
  width: 60px;
  height: 36px;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  background: transparent;
  cursor: pointer;
}
.setting-row input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--color-primary);
}
.setting-row input[type="range"] {
  width: 100%;
  accent-color: var(--color-primary);
}
.setting-row .hint {
  font-size: calc(11px * var(--font-scale));
  color: var(--color-text-muted);
}

body[data-theme="light"] .setting-row select option {
  background: var(--color-bg);
  color: var(--color-text);
}

.api-status {
  margin-top: calc(8px * var(--spacing-scale));
  font-size: calc(13px * var(--font-scale));
  padding: calc(8px * var(--spacing-scale));
  border-radius: var(--border-radius-sm);
  display: none;
}
.api-status.success {
  display: block;
  background: rgba(0, 200, 83, 0.1);
  color: var(--color-success);
  border: 1px solid var(--color-success);
}
.api-status.error {
  display: block;
  background: rgba(255, 68, 68, 0.1);
  color: var(--color-danger);
  border: 1px solid var(--color-danger);
}

/* ============= History Items ============= */
.history-item {
  display: flex;
  gap: calc(12px * var(--spacing-scale));
  padding: calc(8px * var(--spacing-scale));
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: background var(--transition-speed);
  margin-bottom: calc(8px * var(--spacing-scale));
}
.history-item:hover { background: var(--color-bg-hover); }
.history-item img {
  width: 120px;
  aspect-ratio: 16/9;
  object-fit: cover;
  border-radius: var(--border-radius-sm);
  flex-shrink: 0;
}
.history-item .info {
  flex: 1;
  min-width: 0;
}
.history-item .title {
  font-size: calc(13px * var(--font-scale));
  font-weight: 600;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 4px;
}
.history-item .channel {
  font-size: calc(11px * var(--font-scale));
  color: var(--color-text-muted);
}
.history-empty {
  text-align: center;
  padding: calc(40px * var(--spacing-scale));
  color: var(--color-text-muted);
}

/* ============= Subscriptions ============= */
.subs-add-row {
  display: flex;
  gap: calc(8px * var(--spacing-scale));
  margin-bottom: calc(8px * var(--spacing-scale));
}
.subs-add-row input {
  flex: 1;
  padding: calc(8px * var(--spacing-scale)) calc(12px * var(--spacing-scale));
  background: var(--color-bg-elevated);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  font-size: calc(13px * var(--font-scale));
}
.subs-add-row input:focus {
  outline: none;
  border-color: var(--color-primary);
}
.subs-hint {
  font-size: calc(11px * var(--font-scale));
  color: var(--color-text-muted);
  margin-bottom: calc(16px * var(--spacing-scale));
  line-height: 1.5;
}
.subs-hint code {
  background: var(--color-bg-hover);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: calc(11px * var(--font-scale));
  color: var(--color-accent);
}
.subs-list {
  display: flex;
  flex-direction: column;
  gap: calc(6px * var(--spacing-scale));
}
.subs-item {
  display: flex;
  align-items: center;
  gap: calc(12px * var(--spacing-scale));
  padding: calc(8px * var(--spacing-scale));
  border-radius: var(--border-radius-sm);
  transition: background var(--transition-speed);
}
.subs-item:hover { background: var(--color-bg-hover); }
.subs-item .avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-bg-hover);
  flex-shrink: 0;
  overflow: hidden;
}
.subs-item .avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.subs-item .info {
  flex: 1;
  min-width: 0;
}
.subs-item .title {
  font-size: calc(14px * var(--font-scale));
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.subs-item .handle {
  font-size: calc(11px * var(--font-scale));
  color: var(--color-text-muted);
}
.subs-item .remove-btn {
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 18px;
  transition: background var(--transition-speed);
}
.subs-item .remove-btn:hover {
  background: var(--color-danger);
  color: #fff;
}

/* 사이드바 구독 채널 목록 (접힘) */
.sidebar-subs {
  padding: 0 calc(12px * var(--spacing-scale));
  margin-bottom: calc(12px * var(--spacing-scale));
}
.sidebar-subs-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: calc(6px * var(--spacing-scale)) calc(12px * var(--spacing-scale));
  font-size: calc(13px * var(--font-scale));
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}
.sidebar-subs-header button {
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: calc(16px * var(--font-scale));
  width: 24px;
  height: 24px;
  border-radius: 50%;
}
.sidebar-subs-header button:hover { background: var(--color-bg-hover); color: var(--color-text); }
.sidebar-subs-list { display: flex; flex-direction: column; }
.sidebar-subs-item {
  display: flex;
  align-items: center;
  gap: calc(16px * var(--spacing-scale));
  padding: calc(6px * var(--spacing-scale)) calc(12px * var(--spacing-scale));
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: background var(--transition-speed);
  font-size: calc(13px * var(--font-scale));
}
.sidebar-subs-item:hover { background: var(--color-bg-hover); }
.sidebar-subs-item img {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  flex-shrink: 0;
  background: var(--color-bg-hover);
}
.sidebar-subs-item .name {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 비디오 카드 구독 버튼 */
.video-card { position: relative; }
.subscribe-btn {
  position: absolute;
  top: calc(8px * var(--spacing-scale));
  left: calc(8px * var(--spacing-scale));
  background: rgba(0, 0, 0, 0.85);
  color: #fff;
  border: none;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: calc(11px * var(--font-scale));
  font-weight: 600;
  cursor: pointer;
  opacity: 0;
  transition: opacity var(--transition-speed);
}
.video-card:hover .subscribe-btn { opacity: 1; }
.subscribe-btn.subscribed {
  background: var(--color-primary);
  opacity: 1;
}
body.no-animations .subscribe-btn { transition: none; }

/* 구독 페이지 채널 섹션 */
.subs-feed-channel {
  margin-bottom: calc(32px * var(--spacing-scale));
}
.subs-feed-channel-header {
  display: flex;
  align-items: center;
  gap: calc(16px * var(--spacing-scale));
  margin-bottom: calc(12px * var(--spacing-scale));
  padding-bottom: calc(8px * var(--spacing-scale));
  border-bottom: 1px solid var(--color-border);
}
.subs-feed-channel-header img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-bg-hover);
}
.subs-feed-channel-header .info { flex: 1; }
.subs-feed-channel-header .title {
  font-size: calc(18px * var(--font-scale));
  font-weight: 700;
}
.subs-feed-channel-header .handle {
  font-size: calc(12px * var(--font-scale));
  color: var(--color-text-muted);
}
.subs-feed-channel-header button {
  background: var(--color-bg-hover);
  border: none;
  color: var(--color-text);
  padding: 6px 14px;
  border-radius: 16px;
  font-size: calc(12px * var(--font-scale));
  cursor: pointer;
}
.subs-feed-channel-header button:hover { background: var(--color-border); }

/* ============= Backdrop ============= */
.backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 150;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-speed);
}
.backdrop.show { opacity: 1; pointer-events: auto; }

/* ============= Toast ============= */
.toast {
  position: fixed;
  bottom: calc(24px * var(--spacing-scale));
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--color-text);
  color: var(--color-bg);
  padding: calc(12px * var(--spacing-scale)) calc(20px * var(--spacing-scale));
  border-radius: var(--border-radius-sm);
  font-size: calc(14px * var(--font-scale));
  z-index: 300;
  opacity: 0;
  transition: transform 0.3s, opacity 0.3s;
  max-width: 90vw;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}
.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}
.toast.error { background: var(--color-danger); color: #fff; }
.toast.success { background: var(--color-success); color: #fff; }

/* ============= Loading ============= */
.loading {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(60px * var(--spacing-scale));
  flex-direction: column;
  gap: calc(12px * var(--spacing-scale));
}
.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
body.no-animations .spinner { animation: none; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ============= Skeleton ============= */
.skeleton-grid {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(var(--grid-columns), 1fr);
  gap: calc(20px * var(--spacing-scale));
}
.skeleton-card { display: flex; flex-direction: column; gap: calc(8px * var(--spacing-scale)); }
.skeleton-thumb {
  aspect-ratio: 16/9;
  background: linear-gradient(90deg, var(--color-bg-hover) 25%, var(--color-border) 50%, var(--color-bg-hover) 75%);
  background-size: 200% 100%;
  border-radius: var(--border-radius);
  animation: shimmer 1.5s infinite;
}
.skeleton-line {
  height: 14px;
  background: linear-gradient(90deg, var(--color-bg-hover) 25%, var(--color-border) 50%, var(--color-bg-hover) 75%);
  background-size: 200% 100%;
  border-radius: 4px;
  animation: shimmer 1.5s infinite;
}
.skeleton-line.short { width: 60%; }
@keyframes shimmer { 0% { background-position: -200% 0; } 100% { background-position: 200% 0; } }
body.no-animations .skeleton-thumb,
body.no-animations .skeleton-line { animation: none; }

/* ============= Empty State ============= */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: calc(60px * var(--spacing-scale));
  color: var(--color-text-muted);
}
.empty-state h3 {
  color: var(--color-text);
  margin-bottom: calc(8px * var(--spacing-scale));
}

/* API 키 필요 안내 (강조) */
.empty-state.api-required {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  max-width: 640px;
  margin: calc(40px * var(--spacing-scale)) auto;
  padding: calc(40px * var(--spacing-scale));
}
.api-required-icon {
  font-size: calc(56px * var(--font-scale));
  margin-bottom: calc(16px * var(--spacing-scale));
  line-height: 1;
}
.empty-state.api-required h3 {
  font-size: calc(22px * var(--font-scale));
  font-weight: 700;
  margin-bottom: calc(12px * var(--spacing-scale));
  color: var(--color-text);
}
.empty-state.api-required p {
  color: var(--color-text-secondary);
  margin-bottom: calc(24px * var(--spacing-scale));
  line-height: 1.5;
}
.api-required-actions {
  display: flex;
  gap: calc(12px * var(--spacing-scale));
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: calc(24px * var(--spacing-scale));
}
.api-help {
  text-align: left;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  padding: calc(12px * var(--spacing-scale)) calc(16px * var(--spacing-scale));
}
.api-help summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-text-secondary);
  font-size: calc(13px * var(--font-scale));
  user-select: none;
}
.api-help summary:hover { color: var(--color-primary); }
.api-help[open] summary { margin-bottom: calc(12px * var(--spacing-scale)); }
.api-help ol {
  padding-left: 20px;
  font-size: calc(13px * var(--font-scale));
  color: var(--color-text-secondary);
  line-height: 1.7;
}
.api-help ol li { margin-bottom: 4px; }
.api-help a { color: var(--color-accent); text-decoration: underline; }
.api-help .muted {
  margin-top: calc(8px * var(--spacing-scale));
  font-size: calc(12px * var(--font-scale));
  color: var(--color-text-muted);
}

/* 설정 패널 자동-열림 강조 */
.settings-panel.flash {
  animation: panelFlash 1s ease-out;
}
@keyframes panelFlash {
  0% { box-shadow: -4px 0 16px rgba(255, 0, 0, 0.8); }
  100% { box-shadow: -4px 0 16px rgba(0, 0, 0, 0.3); }
}
body.no-animations .settings-panel.flash { animation: none; }

/* ============= Responsive ============= */

/* 모바일: 기본은 데스크톱 CSS, 700px 이하에서 모바일 UI로 전환 */

/* 모바일 헤더 & 하단 탭바: 기본 숨김 (데스크톱) */
/* ============== Mobile Persistent Search Bar ============== */
.mobile-search-input-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  position: relative;
  margin: 0 calc(8px * var(--spacing-scale));
}
#mobileSearchInput2 {
  width: 100%;
  height: 36px;
  padding: 0 calc(12px * var(--spacing-scale)) 0 calc(36px * var(--spacing-scale));
  background: var(--color-bg-elevated);
  color: var(--color-text);
  border: 1px solid transparent;
  border-radius: 18px;
  font-size: calc(15px * var(--font-scale));
  outline: none;
  cursor: pointer;
}
#mobileSearchInput2:focus,
#mobileSearchInput2:hover {
  border-color: var(--color-border);
}
.mobile-search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  pointer-events: none;
}

.mobile-header, .mobile-tabbar, .mobile-search-screen { display: none; }

@media (max-width: 700px) {
  /* 데스크톱 사이드바/헤더 숨김, 모바일 헤더/탭바 표시 */
  .header, .sidebar { display: none !important; }
  .mobile-header { display: flex; }
  .mobile-tabbar { display: flex; }

  /* 메인 영역을 모바일에 맞게 */
  .main {
    top: 0;
    left: 0 !important;
    right: 0 !important;
    bottom: calc(56px + env(safe-area-inset-bottom));
    padding: calc(56px + env(safe-area-inset-top)) calc(8px * var(--spacing-scale)) calc(16px * var(--spacing-scale));
  }
  .filter-bar {
    margin-top: calc(-8px * var(--spacing-scale));
    padding-left: 0;
  }

  /* 1열 비디오 그리드 */
  .content { grid-template-columns: 1fr !important; gap: calc(20px * var(--spacing-scale)); }
  body[data-card-style="spacious"] .content { gap: calc(24px * var(--spacing-scale)); }

  /* 비디오 카드 모바일 스타일 (큰 썸네일 + 그 아래 정보) */
  .video-thumb { border-radius: calc(var(--border-radius) * 1.5); }
  .video-info { gap: calc(12px * var(--spacing-scale)); padding: calc(12px * var(--spacing-scale)) calc(4px * var(--spacing-scale)); }
  .video-title { font-size: calc(15px * var(--font-scale)); -webkit-line-clamp: 2; }
  .video-channel { font-size: calc(13px * var(--font-scale)); }
  .video-stats { font-size: calc(12px * var(--font-scale)); }

  /* 플레이어 모바일 - 거의 풀스크린 */
  .player-view { gap: calc(8px * var(--spacing-scale)); }
  .player-wrapper { margin: 0 calc(-8px * var(--spacing-scale)); border-radius: 0; }
  .player-title { font-size: calc(17px * var(--font-scale)); }
  .player-actions { gap: calc(6px * var(--spacing-scale)); }
  .action-btn { padding: calc(6px * var(--spacing-scale)) calc(10px * var(--spacing-scale)); font-size: calc(12px * var(--font-scale)); }
  .back-btn { margin: 0; padding: calc(8px * var(--spacing-scale)) calc(12px * var(--spacing-scale)); }

  /* 패널은 거의 전체화면 */
  .settings-panel, .history-panel, .subs-panel {
    width: 100vw;
    max-width: 100vw;
  }

  /* 모바일 헤더 */
  .mobile-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: calc(56px + env(safe-area-inset-top));
    padding-top: env(safe-area-inset-top);
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-left: calc(12px * var(--spacing-scale));
    padding-right: calc(12px * var(--spacing-scale));
    z-index: 100;
    border-bottom: 1px solid var(--color-border);
  }
  .mobile-header-btn {
    background: transparent;
    border: none;
    color: var(--color-text);
    padding: 8px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .mobile-header-btn:active { background: var(--color-bg-hover); }

  /* 모바일 하단 탭바 (유튜브 앱 스타일) */
  .mobile-tabbar {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    height: calc(56px + env(safe-area-inset-bottom));
    padding-bottom: env(safe-area-inset-bottom);
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    z-index: 100;
    align-items: stretch;
    justify-content: space-around;
  }
  .tab-item {
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    padding: 6px 0;
    font-size: calc(10px * var(--font-scale));
    font-family: inherit;
    cursor: pointer;
    transition: color var(--transition-speed);
  }
  .tab-item.active { color: var(--color-text); }
  .tab-item.active svg { fill: currentColor; }
  .tab-item:active { background: var(--color-bg-hover); }

  /* 모바일 검색 화면 (풀스크린 오버레이) */
  .mobile-search-screen {
    position: fixed;
    inset: 0;
    background: var(--color-bg);
    z-index: 300;
    display: none;
    flex-direction: column;
  }
  body.mobile-search-open .mobile-search-screen { display: flex; }
  .mobile-search-top {
    display: flex;
    align-items: center;
    gap: calc(8px * var(--spacing-scale));
    padding: calc(10px * var(--spacing-scale)) calc(12px * var(--spacing-scale));
    padding-top: calc(10px * var(--spacing-scale) + env(safe-area-inset-top));
    background: var(--color-bg);
  }
  .mobile-back-btn {
    background: transparent;
    border: none;
    color: var(--color-text);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
  }
  .mobile-back-btn:active { background: var(--color-bg-hover); }
  .mobile-search-input-wrap {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
  }
  #mobileSearchInput {
    flex: 1;
    height: 40px;
    padding: 0 calc(36px * var(--spacing-scale)) 0 calc(16px * var(--spacing-scale));
    background: var(--color-bg-elevated);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    font-size: calc(16px * var(--font-scale));
    outline: none;
  }
  #mobileSearchInput:focus { border-color: var(--color-accent); }
  .mobile-clear-btn {
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
  }
  .mobile-clear-btn.visible { display: flex; }
  .mobile-search-suggest {
    flex: 1;
    overflow-y: auto;
    padding: 0;
  }

  /* 환영 화면 모바일 */
  .welcome-card { padding: calc(20px * var(--spacing-scale)); }
  .welcome-card h1 { font-size: calc(22px * var(--font-scale)); }
  .welcome-actions { flex-direction: column; gap: calc(8px * var(--spacing-scale)); }
  .welcome-actions button { width: 100%; }
  .api-required-icon { font-size: calc(40px * var(--font-scale)); }

  /* Resume 배너 모바일 */
  .resume-banner { flex-direction: column; align-items: stretch; gap: calc(10px * var(--spacing-scale)); }
  .resume-actions { justify-content: stretch; }
  .resume-actions button { flex: 1; }
}

/* 모바일 검색 화면 자동완성 항목 (유튜브 앱 스타일) */
@media (max-width: 700px) {
  .mobile-search-suggest .suggest-item {
    padding: calc(10px * var(--spacing-scale)) calc(16px * var(--spacing-scale));
    font-size: calc(15px * var(--font-scale));
  }
  .mobile-search-suggest .suggest-item .suggest-icon { width: 20px; height: 20px; }
  .mobile-search-suggest .suggest-item .suggest-remove { width: 36px; height: 36px; opacity: 1; }
  .mobile-search-empty {
    text-align: center;
    padding: calc(40px * var(--spacing-scale)) calc(16px * var(--spacing-scale));
    color: var(--color-text-muted);
  }
}

/* 모바일 비디오 카드 전용 (1열 세로) */
@media (max-width: 700px) {
  body[data-card-style="compact"] .content { gap: calc(12px * var(--spacing-scale)); }
  .video-card { display: flex; flex-direction: column; }
}

/* 작은 폰 (iPhone SE 등) */
@media (max-width: 380px) {
  .video-info { padding: calc(8px * var(--spacing-scale)) 0; gap: calc(8px * var(--spacing-scale)); }
  .channel-avatar { width: 32px; height: 32px; }
  .video-progress-badge { font-size: calc(10px * var(--font-scale)); }
}

/* 터치 디바이스 최적화 */
@media (hover: none) {
  .tab-item { min-height: 56px; }
}