/* FEI Art History Journey — styles.css */
/* Keep scoped under #fei-art-system */

#fei-art-system{
  --c-bg-grad: linear-gradient(90deg, #E2D1F9 0%, #9BEBEB 100%);
  --c-text: #1a1a1a;
  --font-ui: 'Montserrat', sans-serif;
  --font-head: 'Playfair Display', serif;

  position: relative;
  width: 100%;
  height: 850px;
  background: var(--c-bg-grad);
  font-family: var(--font-ui);
  color: var(--c-text);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 10px 50px rgba(0,0,0,0.1);
}

#fei-art-system *{ box-sizing: border-box; }

.fei-hidden{ display:none !important; }

/* ---------- fullscreen layers */
.fei-fullscreen{
  position:absolute;
  inset:0;
  z-index:100;
  background: var(--c-bg-grad);
  display:flex;
  align-items:center;
  justify-content:center;
  overflow:hidden;
}

/* COVER background (replace url if needed) */
#fei-cover.fei-fullscreen{
  background:
    linear-gradient(90deg, rgba(226,209,249,0.78) 0%, rgba(155,235,235,0.78) 100%),
    url("https://cdn.prod.website-files.com/67b17a6580f358f0c7dd29f4/699f5c6b1b0802987e7968b0_ChatGPT%20Image%20Feb%2025%2C%202026%2C%2012_32_12%20PM.png")
    center/cover no-repeat;
}

.fei-login-card{
  background: rgba(255,255,255,0.92);
  border: 1px solid rgba(255,255,255,0.85);
  padding: 46px;
  border-radius: 14px;
  box-shadow: 0 14px 40px rgba(0,0,0,0.12);
  text-align:center;
  width: min(420px, 92%);
  backdrop-filter: blur(10px);
}

.fei-brand-tag{
  font-size: 11px;
  letter-spacing: 2px;
  color:#666;
  font-weight: 800;
  margin-bottom: 10px;
}

.fei-login-card h1{
  font-family: var(--font-head);
  font-size: 34px;
  margin: 0 0 10px 0;
  color:#000;
}

.fei-cover-sub{
  margin:0 0 18px 0;
  font-size: 12px;
  color:#666;
}

.fei-login-form label{
  display:block;
  text-align:left;
  font-size: 12px;
  font-weight: 700;
  color:#111;
  margin: 12px 0 8px;
}

.fei-login-form input{
  width:100%;
  padding: 14px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 14px;
  font-family: var(--font-ui);
}

.fei-btn-black{
  background:#000;
  color:#fff;
  border:none;
  width:100%;
  padding: 14px 15px;
  font-weight: 800;
  cursor:pointer;
  border-radius: 10px;
  font-size: 12px;
  letter-spacing: 1px;
  margin-top: 12px;
}
.fei-btn-black:hover{ background:#333; }
.fei-btn-black.full{ width:100%; }

/* ---------- Track select */
.fei-track-panel{
  width: min(760px, 92%);
  background: rgba(255,255,255,0.90);
  border: 1px solid rgba(255,255,255,0.9);
  border-radius: 16px;
  box-shadow: 0 14px 40px rgba(0,0,0,0.10);
  padding: 28px;
  backdrop-filter: blur(12px);
}

.fei-track-title{
  font-family: var(--font-head);
  font-size: 26px;
  margin: 6px 0 8px;
  color:#000;
}

.fei-track-desc{
  margin: 0 0 14px;
  color:#666;
  font-size: 12px;
}

.fei-track-grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 12px;
}

.fei-track-card{
  text-align:left;
  padding: 16px;
  border-radius: 12px;
  border: 1px solid #eee;
  background:#fff;
  cursor:pointer;
  transition: .2s;
}

.fei-track-card:hover{
  border-color:#000;
  transform: translateY(-2px);
}

.fei-track-card .t{
  font-weight: 900;
  font-size: 13px;
  color:#000;
  margin-bottom: 5px;
}

.fei-track-card .s{
  font-size: 11px;
  color:#666;
  line-height: 1.4;
}

.fei-track-card .mini{
  margin-top: 10px;
  font-size: 11px;
  font-weight: 800;
  color:#111;
  opacity: .75;
}

.fei-link-reset{
  background:none;
  border:none;
  font-size: 11px;
  color:#000;
  cursor:pointer;
  text-decoration: underline;
  margin-top: 14px;
}

/* ---------- Header */
.fei-header{
  position:absolute;
  top:0; left:0;
  width:100%;
  height: 74px;
  background: rgba(255,255,255,0.82);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,255,255,0.35);
  display:flex;
  justify-content: space-between;
  align-items:center;
  padding: 0 18px;
  z-index: 10;
}

.fei-user-badge{ display:flex; align-items:center; gap:10px; }

.fei-avatar{
  width: 36px; height: 36px;
  background:#000;
  color:#fff;
  border-radius: 50%;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size: 10px;
  font-weight: 900;
}

.fei-user-text{ display:flex; flex-direction: column; gap:2px; }

#display-name{ font-weight: 900; font-size: 13px; color:#000; }
.fei-progress-pill{ font-size: 10px; color:#555; }

.fei-track-pill{
  display:inline-block;
  width: fit-content;
  font-size: 10px;
  font-weight: 800;
  color:#111;
  opacity: .75;
}

.fei-header-actions{ display:flex; gap:10px; align-items:center; }

/* ---------- Map board (NO SCROLL, auto scale) */
.fei-map-scroll{
  width:100%;
  height:100%;
  padding-top: 86px;
  overflow: hidden; /* no scroll */
}

.fei-board-viewport{
  height: calc(100% - 0px);
  padding: 14px 14px 18px;
}

.fei-board-wrap{
  transform-origin: top center;
  width: 100%;
  display:flex;
  justify-content:center;
}

.fei-board{
  width: min(980px, 100%);
  display:grid;
  grid-template-columns: repeat(5, minmax(150px, 1fr));
  gap: 14px;
  padding: 18px;
  border-radius: 16px;
  background: rgba(255,255,255,0.35);
  border: 1px solid rgba(255,255,255,0.35);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.25);
}

/* responsive columns */
@media (max-width: 900px){
  .fei-board{ grid-template-columns: repeat(4, minmax(150px, 1fr)); }
}
@media (max-width: 640px){
  .fei-track-grid{ grid-template-columns: 1fr; }
  .fei-board{ grid-template-columns: repeat(3, minmax(140px, 1fr)); }
}

.fei-node-card{
  background: rgba(255,255,255,0.92);
  border: 1px solid rgba(255,255,255,0.95);
  border-radius: 12px;
  padding: 14px 14px 12px;
  box-shadow: 0 10px 24px rgba(0,0,0,0.06);
  cursor: pointer;
  position: relative;
  transition: transform .2s, box-shadow .2s;
  min-height: 92px;
}

.fei-node-card:hover{
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(0,0,0,0.10);
}

.fei-node-num{
  position:absolute;
  top:-14px; left:-14px;
  width:30px; height:30px;
  border-radius: 50%;
  display:flex;
  align-items:center;
  justify-content:center;
  background:#000;
  color:#fff;
  font-weight: 900;
  font-size: 12px;
}

.fei-node-card h4{
  margin: 6px 0 6px;
  font-size: 12px;
  font-weight: 900;
  color:#000;
  line-height: 1.25;
}

.fei-node-card p{
  margin:0;
  font-size: 10px;
  color:#666;
  text-transform: uppercase;
}

/* states */
.fei-node-card.locked{ opacity:.45; pointer-events:none; cursor: default; }
.fei-node-card.unlocked{ border-left: 5px solid #000; }
.fei-node-card.completed{ border-left: 5px solid #27AE60; background:#fff; }
.fei-node-card.completed .fei-node-num{ background:#27AE60; }
.fei-node-card.completed::after{
  content:'✓';
  position:absolute;
  top: 10px;
  right: 12px;
  color:#27AE60;
  font-weight: 900;
  font-size: 18px;
}

/* empty track */
.fei-empty{
  grid-column: 1 / -1;
  padding: 22px;
  border-radius: 14px;
  background: rgba(255,255,255,0.85);
  border: 1px solid #eee;
  text-align:center;
}
.fei-empty-title{
  font-family: var(--font-head);
  font-size: 20px;
  color:#000;
  margin-bottom: 6px;
}
.fei-empty-sub{
  font-size: 12px;
  color:#666;
}

/* ---------- Modal */
.fei-overlay{
  position:absolute;
  inset:0;
  background: rgba(255,255,255,0.62);
  backdrop-filter: blur(10px);
  z-index: 200;
  display:flex;
  align-items:center;
  justify-content:center;
}

.fei-modal-window{
  width: 92%;
  max-width: 860px;
  height: 90%;
  background:#fff;
  display:flex;
  flex-direction: column;
  border-radius: 16px;
  box-shadow: 0 24px 70px rgba(0,0,0,0.16);
  overflow:hidden;
  border: 1px solid #eee;
  position: relative;
}

.fei-close{
  position:absolute;
  top: 18px;
  right: 18px;
  background:#f5f5f5;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border:none;
  font-size: 18px;
  cursor:pointer;
  color:#000;
}

.fei-modal-top{
  padding: 28px 28px 12px;
  border-bottom: 1px solid #f2f2f2;
}
.fei-era-tag{
  font-size: 11px;
  color:#999;
  font-weight: 900;
  text-transform: uppercase;
}
.fei-modal-top h2{
  font-family: var(--font-head);
  margin: 6px 0 10px;
  font-size: 28px;
  color:#000;
}

.fei-tabs{
  display:flex;
  gap: 18px;
  padding: 0 28px;
  border-bottom: 1px solid #eee;
}

.fei-tab{
  background:none;
  border:none;
  padding: 14px 6px;
  font-family: var(--font-ui);
  font-weight: 800;
  font-size: 12px;
  color:#999;
  cursor:pointer;
  border-bottom: 2px solid transparent;
}
.fei-tab.active{ color:#000; border-bottom-color:#000; }

.fei-tab-body{
  flex:1;
  overflow-y:auto;
  padding: 30px 28px 34px;
}

.fei-view{ display:none; }
.fei-view.active{ display:block; }

.fei-notebook{
  font-size: 15px;
  line-height: 1.85;
  color:#444;
  max-width: 680px;
  margin: 0 auto;
}

.fei-video-container{
  width:100%;
  aspect-ratio: 16/9;
  background:#000;
  border-radius: 12px;
  margin-bottom: 18px;
  overflow:hidden;
}

.fei-gallery-grid{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.fei-img-box{
  aspect-ratio: 4/3;
  background:#f6f6f6;
  border-radius: 10px;
  overflow:hidden;
}
.fei-img-box img{
  width:100%;
  height:100%;
  object-fit: cover;
}

.fei-sub-heading{
  font-family: var(--font-head);
  font-size: 18px;
  color:#000;
  margin-top: 24px;
  border-bottom: 1px solid #eee;
  padding-bottom: 10px;
}

.fei-resource-list{
  display:flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 14px;
}

.fei-resource-link{
  display:block;
  padding: 12px 14px;
  background:#f9f9f9;
  border: 1px solid #eee;
  border-radius: 10px;
  color:#000;
  text-decoration:none;
  font-weight: 800;
  font-size: 13px;
  transition: .2s;
}
.fei-resource-link:hover{
  background:#000;
  color:#fff;
  border-color:#000;
}

.fei-think-box{
  background:#E8F8F5;
  border: 1px solid #A2D9CE;
  padding: 18px;
  border-radius: 12px;
  margin-bottom: 16px;
}
.fei-think-box h3{ margin:0 0 8px; color:#117A65; font-size: 16px; }

.fei-mission-paper{
  background:#fff;
  border:1px solid #eee;
  padding: 18px;
  border-radius: 12px;
  border-left: 4px solid #000;
}

.fei-quiz-intro{
  text-align:center;
  font-size: 13px;
  color:#666;
  margin-bottom: 16px;
  font-style: italic;
}

.fei-quiz-item{
  margin-bottom: 22px;
  border-bottom: 1px solid #f3f3f3;
  padding-bottom: 18px;
}

.fei-quiz-item p{
  font-weight: 900;
  margin-bottom: 10px;
  font-size: 15px;
  color:#000;
}

.fei-quiz-opt{
  display:block;
  width:100%;
  padding: 12px 12px;
  margin-bottom: 8px;
  background:#fff;
  border: 1px solid #eee;
  border-radius: 10px;
  text-align:left;
  cursor:pointer;
  font-size: 13px;
  font-family: var(--font-ui);
  color:#333;
}
.fei-quiz-opt:hover{ border-color:#000; background:#fafafa; }
.fei-quiz-opt.selected{ background:#000; color:#fff; border-color:#000; }
.fei-quiz-opt.correct{ background:#27AE60; color:#fff; border-color:#27AE60; }
.fei-quiz-opt.wrong{ background:#C0392B; color:#fff; border-color:#C0392B; }

.fei-feedback{
  padding: 14px 14px;
  border-radius: 12px;
  margin-top: 16px;
  font-weight: 900;
}
.fei-feedback.good{ background:#E8F8F5; color:#27AE60; }
.fei-feedback.bad{ background:#FDEDEC; color:#C0392B; }
/* =========================
   Map layout v2 (auto-fit grid)
   Paste at END of styles.css
   ========================= */

/* 让容器高度更“跟着屏幕走”，少一点空白浪费 */
#fei-art-system{
  height: clamp(760px, 88vh, 980px);
}

/* Board：不要固定 5 列，改成自动适配列数
   屏幕越宽，列越多；屏幕窄就自动减少列 */
.fei-board{
  width: min(1240px, 100%);
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: clamp(10px, 1.2vw, 14px);
  padding: clamp(14px, 1.4vw, 18px);
  align-content: start;
}

/* 中等屏幕稍微放大卡片最小宽度，避免字太挤 */
@media (max-width: 900px){
  .fei-board{
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  }
}

/* 小屏保持 3 列比较稳 */
@media (max-width: 640px){
  .fei-board{
    grid-template-columns: repeat(3, minmax(140px, 1fr));
  }
}

/* 卡片：整体稍微“瘦身”，36 节时更容易装下且不显拥挤 */
.fei-node-card{
  min-height: 86px;
  padding: 12px 12px 10px;
}

/* 标题统一两行截断，避免某些标题把卡片撑高导致“忽挤忽松” */
.fei-node-card h4{
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.6em; /* 两行占位，保证卡片高度一致 */
}

/* era 字段太长就省略号，别撑爆布局 */
.fei-node-card p{
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}