/* ===== 基本 ===== */
* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --brand: #0e7c7b;
  --brand-dark: #0a5c5b;
  --brand-deep: #07403f;
  --accent: #ffb547;
  --ink: #1f2933;
  --ink-soft: #5b6770;
  --bg: #f2f6f6;
  --card: #ffffff;
  --line: #dfe8e8;
  --danger: #c0392b;
  --ok: #1d8a4e;
}
html { scrollbar-gutter: stable; }
body {
  font-family: "Noto Sans TC", "Segoe UI", "Microsoft JhengHei", "PingFang TC", sans-serif;
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
}
button { font-family: inherit; cursor: pointer; }
[hidden] { display: none !important; }

/* ===== 設定提示橫幅 ===== */
.config-banner {
  background: #fff3cd;
  color: #7a5b00;
  padding: 10px 16px;
  text-align: center;
  font-size: 14px;
  border-bottom: 1px solid #eadb9a;
}
.config-banner code { background: #f7ecc4; padding: 1px 5px; border-radius: 4px; }

/* ===== 登入畫面 ===== */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background:
    radial-gradient(1100px 500px at 85% -10%, rgba(255, 181, 71, .18), transparent 60%),
    linear-gradient(160deg, #07403f 0%, #0a5c5b 45%, #0f8483 100%);
}
.login-card {
  background: var(--card);
  border-radius: 16px;
  padding: 42px 38px 28px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 24px 60px rgba(0, 35, 35, 0.45);
}
.brand { text-align: center; margin-bottom: 28px; }
.brand-mark {
  width: 54px; height: 54px;
  border-radius: 13px;
  background: linear-gradient(150deg, var(--brand) 0%, var(--brand-dark) 100%);
  color: #fff;
  font-size: 29px; font-weight: 700;
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: 12px;
  box-shadow: 0 6px 16px rgba(14, 124, 123, .35);
}
.brand-mark.small { width: 32px; height: 32px; font-size: 18px; border-radius: 9px; margin: 0; box-shadow: none; }
.brand h1 { font-size: 22px; letter-spacing: 1px; }
.brand-sub { color: var(--ink-soft); font-size: 12px; letter-spacing: 4px; margin-top: 5px; }

#login-form label {
  display: block;
  font-size: 13px;
  color: var(--ink-soft);
  margin: 14px 0 6px;
}
#login-form input {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: 9px;
  font-size: 15px;
  font-family: inherit;
  transition: border-color .15s, box-shadow .15s;
}
#login-form input:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(14, 124, 123, .14);
}
#login-btn {
  width: 100%;
  margin-top: 24px;
  padding: 12px;
  border: none;
  border-radius: 9px;
  background: var(--brand);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 2px;
  transition: background .15s, transform .05s;
}
#login-btn:hover { background: var(--brand-dark); }
#login-btn:active { transform: scale(.99); }
#login-btn:disabled { opacity: .6; cursor: wait; }
.login-error { margin-top: 14px; color: var(--danger); font-size: 14px; text-align: center; }
.login-note {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 12.5px;
  text-align: center;
  line-height: 1.6;
}

/* ===== 頁首 ===== */
.app-header {
  background: linear-gradient(120deg, var(--brand-deep) 0%, var(--brand-dark) 60%, var(--brand) 100%);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 2px 12px rgba(0, 40, 40, .18);
}
.app-header-inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 12px 20px 10px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.app-title { display: flex; align-items: center; gap: 10px; font-size: 17px; font-weight: 700; white-space: nowrap; }
.search-box {
  flex: 1;
  max-width: 420px;
  position: relative;
  margin-left: auto;
}
.search-icon {
  position: absolute;
  left: 11px; top: 50%;
  transform: translateY(-52%);
  font-size: 17px;
  color: rgba(255,255,255,.75);
  pointer-events: none;
}
#search-input {
  width: 100%;
  padding: 8px 12px 8px 34px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.28);
  background: rgba(255,255,255,.14);
  color: #fff;
  font-size: 14px;
  font-family: inherit;
  transition: background .15s, border-color .15s;
}
#search-input::placeholder { color: rgba(255,255,255,.65); }
#search-input:focus { outline: none; background: rgba(255,255,255,.22); border-color: rgba(255,255,255,.55); }
.app-user { display: flex; align-items: center; gap: 12px; font-size: 13.5px; white-space: nowrap; }
#user-email { opacity: .85; }
.btn-ghost {
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.3);
  color: #fff;
  padding: 6px 14px;
  border-radius: 7px;
  font-size: 13.5px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  transition: background .15s;
}
.btn-ghost:hover { background: rgba(255,255,255,.22); }

/* 分類籤選列 */
.chipbar {
  max-width: 1140px;
  margin: 0 auto;
  padding: 2px 20px 10px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}
.chipbar::-webkit-scrollbar { display: none; }
.chip {
  border: 1px solid rgba(255,255,255,.32);
  background: transparent;
  color: rgba(255,255,255,.88);
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 13.5px;
  white-space: nowrap;
  transition: background .15s, color .15s;
}
.chip:hover { background: rgba(255,255,255,.15); }
.chip.active {
  background: #fff;
  color: var(--brand-dark);
  border-color: #fff;
  font-weight: 700;
}
.chip .count { opacity: .65; font-size: 12px; margin-left: 4px; }

/* ===== 內容區 ===== */
.app-main {
  max-width: 1140px;
  margin: 0 auto;
  padding: 26px 20px 60px;
  min-height: 60vh;
}
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--ink-soft);
  padding: 70px 0;
  font-size: 14.5px;
}
.spinner {
  width: 18px; height: 18px;
  border: 2.5px solid var(--line);
  border-top-color: var(--brand);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.category-section { margin-bottom: 38px; }
.category-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 16px;
}
.category-title {
  font-size: 19px;
  font-weight: 700;
  padding-left: 12px;
  border-left: 4px solid var(--brand);
}
.category-count { color: var(--ink-soft); font-size: 13px; }

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 18px;
}

/* 資源卡片 */
.video-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  text-align: left;
  padding: 0;
  display: flex;
  flex-direction: column;
  transition: transform .13s, box-shadow .13s, border-color .13s;
}
.video-card:hover {
  transform: translateY(-3px);
  border-color: #c8d9d9;
  box-shadow: 0 12px 28px rgba(0, 60, 60, 0.13);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  background: linear-gradient(140deg, #e3edec, #d2e2e1);
  overflow: hidden;
}
.video-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.thumb-icon {
  position: absolute;
  inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 46px;
  color: var(--brand-dark);
  opacity: .8;
}
.play-badge {
  position: absolute;
  inset: 0;
  display: flex; align-items: center; justify-content: center;
  opacity: 0;
  background: rgba(5, 40, 40, .35);
  transition: opacity .15s;
}
.video-card:hover .play-badge { opacity: 1; }
.play-badge span {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: rgba(255,255,255,.95);
  color: var(--brand-dark);
  font-size: 22px;
  display: flex; align-items: center; justify-content: center;
  padding-left: 4px;
}
.badge {
  position: absolute;
  top: 8px;
  font-size: 11.5px;
  font-weight: 700;
  padding: 2px 9px;
  border-radius: 999px;
  letter-spacing: .5px;
}
.badge-new { right: 8px; background: var(--accent); color: #5c3d00; }
.badge-watched { left: 8px; background: rgba(255,255,255,.92); color: var(--ok); }
.video-info { padding: 12px 14px 13px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.video-meta { display: flex; align-items: center; gap: 6px; }
.type-tag {
  font-size: 11.5px;
  font-weight: 500;
  padding: 1.5px 8px;
  border-radius: 5px;
  background: #e7f1f1;
  color: var(--brand-dark);
}
.video-info h3 { font-size: 15px; line-height: 1.45; font-weight: 700; }
.video-info p {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.empty-msg { text-align: center; color: var(--ink-soft); padding: 70px 0; line-height: 1.8; }

.app-footer {
  text-align: center;
  color: var(--ink-soft);
  font-size: 12.5px;
  padding: 20px;
  border-top: 1px solid var(--line);
}

/* ===== 播放 / 預覽視窗 ===== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(8, 24, 24, 0.78);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 100;
}
.modal {
  background: var(--card);
  border-radius: 14px;
  width: 100%;
  max-width: 920px;
  padding: 14px 18px 18px;
  box-shadow: 0 28px 70px rgba(0,0,0,.45);
}
.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.modal-head h2 { font-size: 17px; line-height: 1.4; }
.modal-actions { display: flex; gap: 8px; flex-shrink: 0; }
.modal .btn-ghost { background: #eef3f3; border-color: var(--line); color: var(--ink); }
.modal .btn-ghost:hover { background: #e2eaea; }
.player-box {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #000;
  border-radius: 10px;
  overflow: hidden;
}
.player-box iframe, .player-box video {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  border: 0;
  background: #000;
}
.player-desc { margin-top: 12px; color: var(--ink-soft); font-size: 14px; line-height: 1.65; }

/* ===== 手機版 ===== */
@media (max-width: 720px) {
  .login-card { padding: 32px 24px 22px; }
  .app-header-inner { flex-wrap: wrap; gap: 10px; padding-bottom: 4px; }
  .app-title-text { font-size: 16px; }
  .search-box { order: 3; flex-basis: 100%; max-width: none; margin: 2px 0 4px; }
  .app-user { margin-left: auto; }
  #user-email { display: none; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; }
  .thumb-icon { font-size: 34px; }
  .modal { padding: 12px 12px 14px; }
}