/* ===========================================================
   植物大战僵尸 · 网页版  —  样式表
   =========================================================== */

:root {
  --lawn-1: #a2d149;
  --lawn-2: #8cc63f;
  --soil:   #6b4423;
  --panel:  #2b1a0e;
  --panel-2:#3d2612;
  --gold:   #f5c542;
  --gold-2: #d9a520;
  --text:   #f6efe2;
  --green:  #4caf50;
  --red:    #e74c3c;
  --radius: 10px;
  --shadow: 0 6px 20px rgba(0, 0, 0, .45);
}

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

html, body {
  height: 100%;
  overflow: hidden;
  background: #1b1206;
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  color: var(--text);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

#app {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  max-width: 1100px;
  margin: 0 auto;
  background: #241608;
}

/* ---------------- 顶部 HUD ---------------- */
#hud {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 10px;
  background: linear-gradient(#3d2612, #2b1a0e);
  border-bottom: 3px solid #1a0f05;
  flex: 0 0 auto;
}

.hud-left, .hud-right {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
}

.hud-center { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; gap: 4px; }

#sun-box {
  display: flex;
  align-items: center;
  gap: 6px;
  background: #f7e7b0;
  color: #5a3d0a;
  font-weight: 800;
  font-size: 18px;
  padding: 4px 12px;
  border-radius: 20px;
  border: 2px solid #c9a227;
  box-shadow: inset 0 -2px 0 rgba(0,0,0,.12);
  min-width: 88px;
}
#sun-box.bump { animation: bump .28s ease; }
@keyframes bump { 50% { transform: scale(1.16); } }
.sun-icon { font-size: 18px; }

.hud-btn {
  width: 38px; height: 38px;
  font-size: 18px;
  display: grid; place-items: center;
  background: linear-gradient(#c9a227, #a07f14);
  border: 2px solid #6d5408;
  border-radius: 8px;
  color: #fff;
  cursor: pointer;
  transition: transform .1s, filter .15s;
}
.hud-btn:hover { filter: brightness(1.12); }
.hud-btn:active { transform: translateY(1px) scale(.97); }
.hud-btn.active { background: linear-gradient(#7ec850, #4e8b28); border-color: #2f5c14; box-shadow: 0 0 0 2px #b6ff87 inset; }
.hud-btn.muted { opacity: .5; }

#level-badge {
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .5px;
  color: var(--gold);
  text-align: center;
}

#progress-wrap {
  position: relative;
  height: 12px;
  background: #1a0f05;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid #000;
}
#progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #6fbf3a, #a8e063);
  transition: width .25s linear;
}
#progress-flags {
  position: absolute; inset: 0;
  display: flex;
  pointer-events: none;
}
.flag {
  flex: 1;
  border-right: 2px solid rgba(0,0,0,.55);
  position: relative;
}
.flag:last-child { border-right: none; }
.flag.done::after {
  content: "🚩";
  position: absolute;
  right: -2px; top: -4px;
  font-size: 12px;
  line-height: 1;
}

/* ---------------- 种子卡槽 ---------------- */
#seedbar {
  display: flex;
  gap: 6px;
  padding: 8px 10px;
  background: #33200e;
  border-bottom: 3px solid #1a0f05;
  overflow-x: auto;
  flex: 0 0 auto;
  scrollbar-width: thin;
}
#seedbar::-webkit-scrollbar { height: 6px; }
#seedbar::-webkit-scrollbar-thumb { background: #6b4423; border-radius: 3px; }

.seed {
  position: relative;
  flex: 0 0 auto;
  width: 68px;
  background: linear-gradient(#e8d9a8, #cbb87d);
  border: 2px solid #8b7333;
  border-radius: var(--radius);
  padding: 4px 3px 3px;
  cursor: pointer;
  text-align: center;
  transition: transform .12s, box-shadow .15s;
  overflow: hidden;
}
.seed:hover { transform: translateY(-2px); box-shadow: 0 4px 10px rgba(0,0,0,.4); }
.seed.selected {
  border-color: #fff;
  box-shadow: 0 0 0 3px #7ec850, 0 0 14px #7ec850;
  transform: translateY(-3px);
}
.seed .emoji { font-size: 26px; line-height: 1.1; display: block; filter: drop-shadow(0 1px 1px rgba(0,0,0,.3)); }
.seed .name  { font-size: 10px; color: #4a3410; font-weight: 700; margin-top: 1px; }
.seed .cost  {
  font-size: 11px; font-weight: 800; color: #2e2005;
  background: rgba(255,255,255,.55);
  border-radius: 8px;
  padding: 0 5px;
  display: inline-block;
  margin-top: 1px;
}
.seed .key {
  position: absolute; top: 2px; left: 3px;
  font-size: 9px; color: #6b5a2a; font-weight: 700;
}
.seed .cd-mask {
  position: absolute; inset: 0;
  background: rgba(20, 12, 4, .72);
  pointer-events: none;
  transform-origin: top;
  transform: scaleY(0);
}
.seed.disabled { filter: grayscale(.65) brightness(.85); cursor: not-allowed; }
.seed.disabled .cost { color: var(--red); }

/* ---------------- 舞台 / 画布 ---------------- */
#stage {
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
  display: grid;
  place-items: center;
  background:
    radial-gradient(ellipse at 50% 0%, #3f2a12 0%, #1b1206 70%);
  padding: 8px;
  overflow: hidden;
}

#game {
  display: block;
  border-radius: 8px;
  box-shadow: var(--shadow);
  touch-action: none;
  cursor: pointer;
  max-width: 100%;
  max-height: 100%;
}

/* ---------------- Toast ---------------- */
#toast {
  position: absolute;
  top: 14px; left: 50%;
  transform: translateX(-50%);
  background: rgba(20, 12, 4, .92);
  border: 2px solid var(--gold-2);
  color: var(--gold);
  font-weight: 700;
  font-size: 14px;
  padding: 8px 18px;
  border-radius: 24px;
  pointer-events: none;
  opacity: 0;
  transition: opacity .25s, transform .25s;
  z-index: 30;
  white-space: nowrap;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(4px); }

/* ---------------- 遮罩 / 面板 ---------------- */
.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(10, 6, 2, .82);
  backdrop-filter: blur(3px);
  z-index: 40;
  padding: 16px;
  overflow-y: auto;
}
.overlay.hidden { display: none; }
.hidden { display: none !important; }

.panel {
  background: linear-gradient(#3d2612, #241608);
  border: 3px solid #6d5408;
  border-radius: 16px;
  box-shadow: var(--shadow), inset 0 0 0 1px rgba(255,255,255,.06);
  padding: 22px 24px;
  text-align: center;
  max-width: 460px;
  width: 100%;
  animation: pop .22s ease;
}
.panel.wide { max-width: 720px; }
@keyframes pop { from { transform: scale(.94); opacity: 0; } }

.title {
  font-size: clamp(22px, 4.6vw, 34px);
  color: var(--gold);
  text-shadow: 0 2px 0 #7a5c0c, 0 0 22px rgba(245,197,66,.35);
  margin-bottom: 6px;
}
.subtitle { font-size: 13px; color: #b9a582; margin-bottom: 18px; }
.panel h2 { color: var(--gold); font-size: 22px; margin-bottom: 12px; }
.muted { color: #b9a582; font-size: 13px; margin-bottom: 14px; }

/* ---------------- 关卡选择 ---------------- */
#level-select {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(128px, 1fr));
  gap: 10px;
  margin-bottom: 18px;
}

.level-card {
  background: linear-gradient(#4a7c23, #2f5413);
  border: 2px solid #7ec850;
  border-radius: 12px;
  padding: 12px 8px;
  cursor: pointer;
  transition: transform .12s, box-shadow .15s;
  text-align: center;
}
.level-card:hover:not(.locked) { transform: translateY(-3px); box-shadow: 0 6px 16px rgba(126,200,80,.35); }
.level-card .lv-num  { font-size: 12px; color: #cdeaa8; letter-spacing: 1px; }
.level-card .lv-name { font-size: 15px; font-weight: 800; margin: 3px 0 5px; }
.level-card .lv-desc { font-size: 11px; color: #d8e9c0; line-height: 1.35; }
.level-card .lv-stars { font-size: 12px; margin-top: 5px; letter-spacing: 1px; }
.level-card.locked {
  background: linear-gradient(#3a3a3a, #242424);
  border-color: #555;
  cursor: not-allowed;
  opacity: .75;
}
.level-card.locked .lv-name, .level-card.locked .lv-desc { color: #999; }

.best-box {
  font-size: 13px;
  color: #cbb87d;
  margin-bottom: 6px;
}
.best-box strong { color: var(--gold); }
.best-box .sep { margin: 0 8px; opacity: .5; }
.credits { font-size: 11px; color: #8a7a5c; margin-top: 14px; line-height: 1.6; }

/* ---------------- 按钮 ---------------- */
.btn-row {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 16px;
}

.btn {
  font-family: inherit;
  font-size: 14px;
  font-weight: 700;
  color: #f6efe2;
  background: linear-gradient(#6b4423, #4a2d14);
  border: 2px solid #8b6b3a;
  border-radius: 10px;
  padding: 10px 20px;
  cursor: pointer;
  transition: transform .1s, filter .15s;
}
.btn:hover { filter: brightness(1.15); }
.btn:active { transform: translateY(1px); }
.btn.primary {
  background: linear-gradient(#7ec850, #4e8b28);
  border-color: #b6ff87;
  color: #12290a;
  text-shadow: 0 1px 0 rgba(255,255,255,.35);
}

kbd {
  background: #1a0f05;
  border: 1px solid #6d5408;
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 1px 5px;
  font-family: ui-monospace, Consolas, monospace;
  font-size: 11px;
  color: var(--gold);
}

/* ---------------- 帮助 ---------------- */
.help-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 14px;
  text-align: left;
  margin-top: 6px;
}
.help-grid section {
  background: rgba(0,0,0,.28);
  border: 1px solid #6d5408;
  border-radius: 10px;
  padding: 10px 12px;
}
.help-grid h3 { font-size: 14px; color: var(--gold); margin-bottom: 6px; }
.help-grid p  { font-size: 12.5px; line-height: 1.6; color: #ddd0b8; }
.help-grid b  { color: #fff; }

/* ---------------- 开关（自动拾取阳光） ---------------- */
.switch-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  padding-top: 9px;
  border-top: 1px solid rgba(109, 84, 8, .55);
  cursor: pointer;
  user-select: none;
}
.switch-row input {
  position: absolute;
  opacity: 0;
  width: 0; height: 0;
}
.switch-track {
  position: relative;
  flex: 0 0 auto;
  width: 38px;
  height: 20px;
  border-radius: 10px;
  background: #1a0f05;
  border: 2px solid #6d5408;
  transition: background .18s, border-color .18s;
}
.switch-knob {
  position: absolute;
  top: 2px; left: 2px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: #8a7a5c;
  transition: transform .18s, background .18s;
}
.switch-row input:checked + .switch-track {
  background: #4e8b28;
  border-color: #b6ff87;
}
.switch-row input:checked + .switch-track .switch-knob {
  transform: translateX(18px);
  background: #eaffd6;
}
.switch-row input:focus-visible + .switch-track {
  box-shadow: 0 0 0 3px rgba(126, 200, 80, .5);
}
.switch-label {
  font-size: 12.5px;
  color: #ddd0b8;
  font-weight: 600;
}

/* ---------------- 结算 ---------------- */
#result-title { font-size: 28px; }
#result-title.win  { color: #8ce06a; text-shadow: 0 0 20px rgba(126,200,80,.6); }
#result-title.lose { color: #ff7b6b; text-shadow: 0 0 20px rgba(231,76,60,.6); }
#result-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin: 16px 0 4px;
  text-align: left;
}
.stat {
  background: rgba(0,0,0,.3);
  border: 1px solid #6d5408;
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 13px;
  display: flex;
  justify-content: space-between;
}
.stat span { color: #b9a582; }
.stat strong { color: var(--gold); }

/* ---------------- 移动端 ---------------- */
@media (max-width: 640px) {
  #sun-box { font-size: 15px; padding: 3px 9px; min-width: 68px; }
  .hud-btn { width: 32px; height: 32px; font-size: 15px; }
  .seed { width: 58px; }
  .seed .emoji { font-size: 22px; }
  .seed .name { font-size: 9px; }
  .panel { padding: 16px; }
  #result-stats { grid-template-columns: 1fr; }
}