/* ==================== 设计系统 ==================== */
:root {
  /* OOEG 官网书卷暖米风（#F5F0E5 / #5C3D23 / #D1B992） */
  --bg: #F5F0E5;
  --card: #FFFAF0;
  --ink: #5C3D23;
  --gray: #8A6D4D;
  --gray-dim: #C4B49B;
  --blue: #A0522D;        /* 赭石：结构/普通高亮 */
  --blue-soft: #F0E2D6;
  --green: #7A8450;       /* 橄榄：词汇/成功 */
  --green-soft: #E6E8D9;
  --orange: #C97B4A;      /* 陶土：简化/提示 */
  --orange-soft: #F5E8D8;
  --gold: #C9A227;        /* 琥珀金：主干 */
  --shadow: rgba(92, 61, 35, .12);
  --radius: 14px;
  --font-en: Georgia, "Times New Roman", serif;
  --font-zh: "Microsoft YaHei", "微软雅黑", sans-serif;
}

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

html, body { height: 100%; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-zh);
  overflow: hidden;
}

/* ==================== 背景光晕 ==================== */
#app::before {
  content: "";
  position: fixed; inset: -20%;
  background:
    radial-gradient(420px 420px at 18% 22%, rgba(160,82,45,.07), transparent 70%),
    radial-gradient(380px 380px at 84% 30%, rgba(122,132,80,.06), transparent 70%),
    radial-gradient(300px 300px at 62% 88%, rgba(201,123,74,.05), transparent 70%);
  animation: drift 60s ease-in-out infinite alternate;
  z-index: 0;
  pointer-events: none;
}
@keyframes drift {
  from { transform: translate(-1.5%, -1%) rotate(0deg); }
  to   { transform: translate(1.5%, 1%) rotate(4deg); }
}

#app { position: relative; height: 100vh; height: 100dvh; display: flex; flex-direction: column; z-index: 1; }

/* ==================== 顶栏 ==================== */
#topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 18px; gap: 12px; flex-wrap: wrap;
  background: rgba(255,250,240,.75); backdrop-filter: blur(10px);
  border-bottom: 1px solid #E5D9C3; z-index: 5;
}
.brand { font-family: var(--font-en); font-size: 19px; font-weight: 700; color: var(--ink); letter-spacing: .5px; }
.brand span { font-family: var(--font-zh); font-size: 14px; font-weight: 600; color: var(--blue); }
.picker { display: flex; align-items: center; gap: 8px; }
.picker select {
  font-family: var(--font-zh); font-size: 14px; padding: 5px 10px;
  border: 1px solid #D1B992; border-radius: 8px; background: #FFFAF0; color: var(--ink);
  cursor: pointer; max-width: 120px;
}
.pos { font-size: 13px; color: var(--gray); white-space: nowrap; }
.icon-btn {
  width: 32px; height: 32px; border: none; border-radius: 9px; cursor: pointer;
  background: #EDE4D2; color: var(--gray); font-size: 14px;
  transition: background .15s, transform .15s;
}
.icon-btn:hover { background: #E4D8C2; transform: translateY(-1px); }

/* ==================== 舞台（左右分屏：左原句 / 右分析） ==================== */
#stage {
  flex: 1; display: flex; flex-direction: row;
  align-items: stretch; gap: 18px;
  width: 100%; max-width: 1200px;
  margin: 0 auto; padding: 16px 20px 8px; min-height: 0; z-index: 2;
}

#sentenceZone {
  flex: 0 0 42%; min-width: 0; min-height: 0;
  display: flex;                            /* 原句对齐左上角 */
  overflow-y: auto;
}
#sentenceBox {
  width: 100%; margin: 0; align-self: flex-start;
  background: var(--card); border-radius: var(--radius);
  box-shadow: 0 6px 24px var(--shadow), 0 1px 3px rgba(92,61,35,.08);
  padding: 18px 20px; position: relative;
}
#sentenceBox::before {
  content: ""; position: absolute; left: 0; top: 16px; bottom: 16px; width: 4px;
  border-radius: 0 4px 4px 0; background: var(--green);
}
#parts {
  font-family: var(--font-en); font-size: clamp(15px, 1.6vw, 19px);
  line-height: 1.7; color: var(--gray); transition: none;
}
#parts .part { transition: color .3s ease, transform .3s ease, text-shadow .3s ease, background .3s ease; display: inline; }
/* 讲解中的部分：荧光高亮带 + 蓝色下划线 */
#parts .part.focus {
  color: var(--ink); font-weight: 700;
  background: linear-gradient(180deg, transparent 58%, rgba(160,82,45,.20) 58%);
  border-bottom: 2.5px solid var(--blue);
  text-shadow: 0 0 16px rgba(160,82,45,.22);
  padding: 0 1px;
}
#parts .part.dim { color: var(--gray-dim); }
/* 主干（金色强化）：更粗下划线 + 金色光晕 */
#parts .part.main-focus {
  color: var(--ink); font-weight: 800;
  background: linear-gradient(180deg, transparent 55%, rgba(201,162,39,.32) 55%);
  border-bottom: 3px solid var(--gold);
  text-shadow: 0 0 18px rgba(201,162,39,.45);
  padding: 0 2px;
}

/* ==================== 左右分栏分隔线 ==================== */
#divider {
  flex: 0 0 1px; align-self: stretch;
  background: linear-gradient(180deg, transparent 0%, #D1B992 12%, #D1B992 88%, transparent 100%);
}

/* ==================== 卡片区（右栏） ==================== */
#cardZone {
  flex: 1; min-width: 0; min-height: 0;
  display: flex; flex-direction: column; align-items: stretch;
  overflow-y: auto;                        /* 分析内容超高时可滚动 */
}
#activeCard { width: 100%; position: relative; }

.layer {
  width: 100%; margin-bottom: 10px; transform-origin: top center;
}

.card {
  background: var(--card); border-radius: 12px; border-left: 4px solid var(--blue);
  box-shadow: 0 8px 28px var(--shadow); padding: 14px 18px; width: 100%;
}
.card.green { border-left-color: var(--green); }
.card.orange { border-left-color: var(--orange); }
.card .label {
  font-size: 12px; font-weight: 800; letter-spacing: 1.5px;
  color: var(--blue); margin-bottom: 6px; display: flex; align-items: center; gap: 6px;
}
.card.green .label { color: var(--green); }
.card.orange .label { color: var(--orange); }
.card .en { font-family: var(--font-en); font-size: clamp(15px, 1.8vw, 19px); line-height: 1.6; font-weight: 700; }
.card .zh { font-size: clamp(14px, 1.6vw, 16px); line-height: 1.7; color: var(--ink); margin-top: 6px; }

.chip {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--green-soft); color: var(--green);
  border-radius: 20px; padding: 5px 13px; font-size: 13.5px; font-weight: 700;
  margin: 3px 5px 3px 0; white-space: nowrap;
}
.chip .en { font-family: var(--font-en); }
.chip.blue { background: var(--blue-soft); color: var(--blue); }
.chip.capsule { animation: capsuleIn .38s cubic-bezier(.34,1.56,.64,1) both; }
@keyframes capsuleIn {
  from { opacity: 0; transform: scale(.3) translateY(14px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.type-chip {
  display: inline-block; background: var(--orange-soft); color: #B98A3E;
  border-radius: 8px; padding: 7px 14px; font-size: 14px; font-weight: 700;
  margin-top: 8px; animation: chipFlip .5s ease both;
}
@keyframes chipFlip {
  0% { opacity: 0; transform: rotateX(90deg) scale(.8); }
  100% { opacity: 1; transform: none; }
}

/* ==================== 底栏 ==================== */
/* 底部中央留出按钮区，避免误触 */
#bottombar {
  display: flex; align-items: center; gap: 14px;
  padding: 10px 22px 14px; z-index: 6;  /* 6 > 点击层 3，保证按钮可点击 */
  background: rgba(255,250,240,.75); backdrop-filter: blur(10px);
  border-top: 1px solid #E5D9C3;
  pointer-events: auto; position: relative;
}
.nav-btn {
  font-family: var(--font-zh); font-size: 14px; font-weight: 700;
  padding: 8px 16px; border: none; border-radius: 10px; cursor: pointer;
  background: #EDE4D2; color: var(--gray); transition: all .15s;
}
.nav-btn:hover { transform: translateY(-1px); }
.nav-btn.primary { background: var(--blue); color: #FFFAF0; box-shadow: 0 4px 14px rgba(160,82,45,.35); }
.nav-btn:disabled { opacity: .45; cursor: default; transform: none; }

#progressWrap { flex: 1; height: 5px; background: #E5D9C3; border-radius: 3px; overflow: hidden; }
#progressBar { height: 100%; width: 0; background: linear-gradient(90deg, var(--blue), var(--green)); border-radius: 3px; transition: width .45s cubic-bezier(.34,1.56,.64,1); }
#phaseDots { display: flex; gap: 7px; align-items: center; }
.phase-dot { width: 9px; height: 9px; border-radius: 50%; background: #D1B992; transition: all .3s; }
.phase-dot.done { background: var(--blue); }
.phase-dot.current { background: var(--gold); box-shadow: 0 0 0 0 rgba(201,162,39,.6); animation: pulse 1.6s ease infinite; }
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(201,162,39,.55); }
  70% { box-shadow: 0 0 0 7px rgba(201,162,39,0); }
  100% { box-shadow: 0 0 0 0 rgba(201,162,39,0); }
}

/* ==================== 点击分区 ==================== */
#clickLayer { position: fixed; inset: 0; z-index: 3; display: flex; pointer-events: none; }
.click-zone { flex: 1; pointer-events: auto; cursor: pointer; }
#leftZone:hover { background: linear-gradient(90deg, rgba(160,82,45,.05), transparent); }
#rightZone:hover { background: linear-gradient(270deg, rgba(160,82,45,.05), transparent); }
/* ==================== 完成彩蛋 ==================== */
.celebration { position: fixed; top: 0; left: 50%; transform: translateX(-50%); pointer-events: none; z-index: 9; }
.celebration i {
  position: absolute; bottom: 0; width: 5px; height: 5px; border-radius: 50%;
  animation: burst .9s ease-out forwards;
}
@keyframes burst {
  to { transform: translateY(-46vh) translateX(var(--dx)) scale(.5); opacity: 0; }
}

/* ==================== 响应式 ==================== */
@media (max-width: 767px) {
  .brand span { display: none; }
  .picker select { max-width: 84px; }
  #stage { padding: 10px 10px 6px; gap: 10px; }
  #sentenceBox { padding: 10px 9px; }
  #sentenceBox::before { top: 10px; bottom: 10px; width: 3px; }
  #parts { font-size: clamp(12px, 3.4vw, 15px); line-height: 1.6; }
  .card { padding: 10px 12px; }
  .card .en { font-size: clamp(13px, 3.4vw, 16px); }
  .card .zh { font-size: clamp(12px, 3.2vw, 14px); }
  .chip { font-size: 11.5px; padding: 4px 9px; white-space: normal; overflow-wrap: anywhere; line-height: 1.45; }
  .pos { display: none; }
  .nav-btn { padding: 8px 10px; font-size: 13px; }
  .nav-btn.primary { box-shadow: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

/* ==================== 手机强制横屏遮罩 ==================== */
#rotate-overlay {
  display: none;
  position: fixed; inset: 0; z-index: 999;
  background: linear-gradient(160deg, #F5F0E5 0%, #E8DCC5 100%);
  flex-direction: column; align-items: center; justify-content: center; gap: 14px;
  text-align: center; padding: 32px;
}
.rotate-icon { font-size: 64px; animation: rotateNudge 1.6s ease-in-out infinite; }
.rotate-title { font-size: 22px; font-weight: 800; color: var(--ink); letter-spacing: 2px; }
.rotate-sub { font-size: 13px; color: var(--gray); letter-spacing: .5px; }
@keyframes rotateNudge {
  0%, 100% { transform: rotate(0deg); }
  50% { transform: rotate(90deg); }
}

/* 竖屏窄屏（手机竖屏）→ 遮罩显示、页面隐藏 */
@media (orientation: portrait) and (max-width: 767px) {
  #rotate-overlay { display: flex; }
  #app { visibility: hidden; }
}