:root {
  /* 뉴모피즘 가이드 이미지 기반 팔레트 */
  /* bg color: #ECF0F3 */
  --bg: #ecf0f3;
  --bg-soft: #ecf0f3;
  --bg-softer: #f7fafc;

  --accent: #111827;
  --accent-soft: rgba(17, 24, 39, 0.08);
  --accent-strong: #111827;

  --border: #d1d9e6;
  --text: #111827;
  --text-soft: #6b7280;

  --radius-lg: 26px;
  --radius-md: 18px;

  /* drop shadow: blur 30px, x/y 18px, colors #D1D9E6 / #FFF */
  --shadow-soft: 18px 18px 30px #d1d9e6, -18px -18px 30px #ffffff;
  /* inner shadow: blur 30px, x/y ±18px, colors 동일 */
  --shadow-inner: inset 18px 18px 30px #d1d9e6, inset -18px -18px 30px #ffffff;

  --transition-fast: 150ms ease-out;
}

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

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', sans-serif;
  /* 밝은 뉴모피즘 배경 */
  background: #ecf0f3;
  color: var(--text);
}

body {
  display: flex;
  align-items: stretch;
  justify-content: stretch;
  min-height: 100vh;
}

.app {
  max-width: 1160px;
  width: 100%;
  /* 내부 콘텐츠 높이에 맞추도록 min-height 제거 */
  margin: auto;
  padding: 22px 24px 20px;
  background: var(--bg-soft);
  border-radius: 32px;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(255, 255, 255, 0.7);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.app-header {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 6px 4px 4px;
}

.logo {
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: 0.03em;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.logo::before {
  content: '';
  width: 18px;
  height: 18px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 30%, #f97373, #b91c1c);
  box-shadow: 0 0 0 1px rgba(248, 113, 113, 0.5);
}

.subtitle {
  font-size: 0.86rem;
  color: var(--text-soft);
}

.app-main {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.input-panel,
.player-panel {
  background: var(--bg-soft);
  border-radius: var(--radius-lg);
  padding: 14px 16px 14px;
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* player 영역은 카드 배경 없이 사용 */
.player-panel {
  background: transparent;
  border: none;
  box-shadow: none;
}

.panel-title {
  font-size: 0.95rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.panel-title::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 8px rgba(239, 68, 68, 0.7);
}

.panel-desc {
  margin: 0;
  font-size: 0.78rem;
  color: var(--text-soft);
  line-height: 1.5;
}

.url-input {
  width: 100%;
  min-height: 180px;
  resize: vertical;
  background: var(--bg-soft);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.9);
  padding: 10px 11px;
  color: var(--text);
  font-size: 0.82rem;
  line-height: 1.6;
  outline: none;
  box-shadow: var(--shadow-inner);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast),
    background var(--transition-fast), transform 90ms ease-out;
}

.url-input::placeholder {
  color: rgba(148, 163, 184, 0.6);
}

.url-input:focus {
  border-color: var(--accent);
  box-shadow: var(--shadow-inner);
  background: var(--bg-softer);
  transform: translateY(-1px);
}

.actions {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}

.btn {
  border: none;
  outline: none;
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: transform 120ms ease-out, box-shadow var(--transition-fast),
    background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.btn.primary {
  background: var(--bg-soft);
  color: var(--accent-strong);
  box-shadow: var(--shadow-soft);
}

.btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-soft);
}

.btn.primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-inner);
}

.btn.ghost {
  background: var(--bg-soft);
  color: var(--text-soft);
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-soft);
}

.btn.ghost:hover {
  background: var(--bg-softer);
  color: var(--accent-strong);
  border-color: rgba(209, 213, 219, 0.9);
  box-shadow: var(--shadow-soft);
}

.btn.icon {
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--text-soft);
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-soft);
  font-size: 0.8rem;
}

.btn.icon:hover {
  background: rgba(248, 113, 113, 0.18);
  color: var(--accent-strong);
  border-color: rgba(248, 113, 113, 0.9);
}

.btn:disabled {
  opacity: 0.45;
  cursor: default;
  transform: none;
  box-shadow: none;
}

.message {
  min-height: 18px;
  font-size: 0.76rem;
  margin: 2px 2px 0;
  color: var(--text-soft);
}

.message.error {
  color: #fecaca;
}

.message.success {
  color: #bbf7d0;
}

.player-panel {
  gap: 12px;
}

.player-top {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 10px;
}

.current-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.current-title {
  font-size: 0.82rem;
  color: var(--text-soft);
}

.player-content {
  display: grid;
  /* 왼쪽(영상)을 크게, 오른쪽(플레이리스트)을 좁게 */
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.9fr);
  gap: 14px;
  align-items: stretch;
}

.playlist {
  background: #C9C9C9;
  border-radius: 18px;
  padding: 10px 10px 8px;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.playlist-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}

.playlist-header-actions {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.playlist-title {
  font-size: 0.8rem;
  margin: 2px 0 0;
  color: #e5e7eb;
  font-weight: 600;
}

.playlist-add-btn {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.8rem;
  line-height: 1;
}

.playlist-edit-btn {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  line-height: 1;
}

.playlist-input-panel {
  display: none;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 6px;
}

.playlist-input-panel.open {
  display: flex;
}

.panel-desc.small {
  font-size: 0.75rem;
}

.playlist-url-input {
  min-height: 96px;
  font-size: 0.8rem;
}

.playlist-actions {
  margin-top: 2px;
}

/* 모달 스타일 */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.75);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 50;
}

.modal-backdrop.open {
  display: flex;
}

.modal-dialog {
  width: min(560px, 100% - 32px);
  background: var(--bg-soft);
  border-radius: 20px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  box-shadow: var(--shadow-soft);
  padding: 14px 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.modal-title {
  font-size: 0.9rem;
  font-weight: 600;
}

.modal-close-btn {
  width: 28px;
  height: 28px;
  padding: 0;
  border-radius: 999px;
}

.modal-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.modal-label {
  font-size: 0.78rem;
  color: var(--text-soft);
}

.time-input {
  padding: 8px 10px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: rgba(15, 23, 42, 0.95);
  color: var(--text);
  font-size: 0.82rem;
  outline: none;
}

.time-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(248, 113, 113, 0.45), 0 0 0 1px rgba(15, 23, 42, 0.3);
}

.playlist-list {
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-y: auto;
  flex: 1 1 auto;
  max-height: none;
  min-height: 0;
  scrollbar-width: thin;
  scrollbar-color: rgba(148, 163, 184, 0.6) transparent;
  font-size: 0.8rem;
}

.playlist-list::-webkit-scrollbar {
  width: 5px;
}

.playlist-list::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.7);
  border-radius: 999px;
}

.playlist-item {
  padding: 8px 10px;
  border-radius: 12px;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 8px;
  position: relative;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast),
    transform 90ms ease-out, box-shadow var(--transition-fast);
}

.playlist-item:hover {
  background: rgba(30, 64, 175, 0.25);
  transform: translateY(-1px);
}

.playlist-item.active {
  background: linear-gradient(135deg, #f472b6, #ec4899);
  color: #fdf2f8;
}

.playlist-item-index {
  font-size: 0.74rem;
  color: rgba(148, 163, 184, 0.9);
}

.playlist-item-title {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.playlist-item-duration {
  font-size: 0.74rem;
  color: rgba(156, 163, 175, 0.95);
  margin-left: 4px;
}

.playlist-item-actions {
  display: none;
  align-items: center;
  gap: 4px;
  margin-left: 4px;
}

.playlist-item.editing .playlist-item-actions {
  display: inline-flex;
}

.playlist-icon-btn {
  width: 24px;
  height: 24px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.7);
  background: transparent;
  color: rgba(156, 163, 175, 0.95);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast),
    border-color var(--transition-fast), transform 90ms ease-out;
}

.playlist-icon-btn:hover {
  background: rgba(248, 113, 113, 0.12);
  color: #fecaca;
  border-color: rgba(248, 113, 113, 0.8);
  transform: translateY(-1px);
}

.playlist-more-btn {
  font-size: 0.9rem;
}

.playlist-menu {
  position: absolute;
  right: 6px;
  top: 100%;
  margin-top: 4px;
  min-width: 110px;
  background: rgba(15, 23, 42, 1);
  border-radius: 10px;
  border: 1px solid rgba(55, 65, 81, 1);
  box-shadow: 0 16px 30px rgba(15, 23, 42, 0.95);
  padding: 4px;
  display: none;
  z-index: 60;
}

.playlist-menu.open {
  display: flex;
  flex-direction: column;
}

.playlist-menu-item {
  background: transparent;
  border: none;
  color: rgba(209, 213, 219, 0.95);
  font-size: 0.78rem;
  padding: 6px 8px;
  text-align: left;
  border-radius: 6px;
  cursor: pointer;
}

.playlist-menu-item:hover {
  background: rgba(55, 65, 81, 0.85);
}

.playlist-menu-item.danger {
  color: #fecaca;
}

.video-wrapper {
  background: transparent;
  border-radius: 22px;
  border: none;
  padding: 0;
  display: flex;
}

.video-container {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  border-radius: 22px;
  overflow: hidden;
  background: radial-gradient(circle at center, #1f2937, #020617);
}

.video-container iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
  border-radius: inherit;
}

.app-footer {
  font-size: 0.75rem;
  color: var(--text-soft);
  padding: 2px 4px 0;
  display: flex;
  justify-content: space-between;
}

@media (max-width: 900px) {
  .app {
    margin: 50px;
    padding: 16px 14px 14px;
  }

  .app-main {
    grid-template-columns: minmax(0, 1fr);
  }

  .player-content {
    grid-template-columns: minmax(0, 1fr);
  }

  .playlist-list {
    max-height: 150px;
  }
}

@media (max-width: 600px) {
  .actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .player-top {
    flex-direction: column;
    align-items: flex-start;
  }

  .player-controls {
    align-self: flex-end;
  }
}