/* ============================================================
   星尘防线 · Stardust Defense — 2D 手绘卡通风格
   ============================================================ */
:root {
  --cream:      #FFF6E5;   /* 奶油底 */
  --cream-2:    #FFEECB;
  --ink:        #3B2E2A;   /* 深棕描边/文字 */
  --gold:       #FFCC00;   /* 主色（README 主色） */
  --gold-dark:  #E0A800;
  --green:      #7ED348;
  --blue:       #4ECDC4;
  --ice:        #7FD8F7;
  --fire:       #FF6B35;
  --laser:      #B06DF5;
  --red:        #FF5A5A;
  --shadow:     rgba(59, 46, 42, 0.18);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  background: var(--cream);
  color: var(--ink);
  overflow: hidden;
  user-select: none;
}

.screen {
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
}
.hidden { display: none !important; }

/* ---------------- 开始屏 ---------------- */
#start-screen {
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(circle at 20% 20%, #FFF0C9 0%, transparent 40%),
    radial-gradient(circle at 80% 30%, #E7F6FF 0%, transparent 40%),
    radial-gradient(circle at 60% 80%, #FFE9D6 0%, transparent 45%),
    var(--cream);
}
.title-card {
  text-align: center;
  background: #fff;
  border: 4px solid var(--ink);
  border-radius: 24px;
  box-shadow: 8px 8px 0 var(--shadow);
  padding: 2.2rem 3rem 2.6rem;
  max-width: 520px;
}
.title-emoji { font-size: 2.6rem; }
.game-title {
  margin: 0.4rem 0 0.2rem;
  font-size: 3rem;
  letter-spacing: 4px;
  color: var(--ink);
  text-shadow: 3px 3px 0 var(--gold);
}
.subtitle { font-weight: 700; color: #8a6d4b; margin: 0 0 0.8rem; }
.desc { line-height: 1.7; color: #6b554a; margin: 0 0 1.6rem; }

/* ---------------- 通用按钮 ---------------- */
.btn {
  font-family: inherit;
  font-size: 1rem;
  font-weight: 800;
  color: var(--ink);
  background: var(--gold);
  border: 3px solid var(--ink);
  border-radius: 14px;
  padding: 0.5rem 1rem;
  cursor: pointer;
  box-shadow: 0 4px 0 var(--ink);
  transition: transform 0.06s ease, box-shadow 0.06s ease, filter 0.12s ease;
}
.btn:hover { filter: brightness(1.05); }
.btn:active { transform: translateY(4px); box-shadow: 0 0 0 var(--ink); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; box-shadow: 0 4px 0 var(--ink); }
.btn:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; }
.btn-big { font-size: 1.3rem; padding: 0.8rem 2.4rem; border-radius: 16px; }
.btn-sm { font-size: 0.85rem; padding: 0.3rem 0.7rem; border-width: 2px; box-shadow: 0 3px 0 var(--ink); }
.btn-sm:active { transform: translateY(3px); box-shadow: 0 0 0 var(--ink); }
.btn-ghost { background: #fff; }
.btn-ghost:hover { background: #f0f0f0; filter: none; }
.btn-danger { background: var(--red); }
.btn-green { background: var(--green); }

/* ---------------- 游戏主界面 ---------------- */
#game-screen { background: var(--cream); }

/* 顶栏 HUD */
#hud {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.5rem 0.9rem;
  background: var(--cream-2);
  border-bottom: 4px solid var(--ink);
  flex-wrap: wrap;
}
.hud-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: #fff;
  border: 2.5px solid var(--ink);
  border-radius: 999px;
  padding: 0.2rem 0.8rem;
  font-weight: 800;
}
.hud-val { min-width: 1.2em; text-align: left; font-variant-numeric: tabular-nums; }
.hud-power { background: #FFF3D6; }
.hud-spacer { flex: 1; }

/* 主区域 */
#game-main {
  flex: 1;
  display: flex;
  min-height: 0;
}

/* 侧栏 */
#sidebar {
  width: 248px;
  min-width: 248px;
  background: var(--cream-2);
  border-right: 4px solid var(--ink);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}
#tabbar { display: flex; border-bottom: 3px solid var(--ink); }
.tab {
  flex: 1;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 800;
  background: transparent;
  border: none;
  border-right: 3px solid var(--ink);
  padding: 0.55rem 0.2rem;
  cursor: pointer;
  color: var(--ink);
  transition: background 0.15s ease, transform 0.06s ease;
}
.tab:hover:not(.active) { background: rgba(255, 204, 0, 0.25); }
.tab:active { transform: scale(0.96); }
.tab:focus-visible { outline: 3px solid var(--blue); outline-offset: -3px; }
.tab:last-child { border-right: none; }
.tab.active { background: var(--gold); }

.tab-panel { padding: 0.7rem; display: none; animation: fadeIn 0.18s ease; }
.tab-panel.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }
.hint { font-size: 0.78rem; color: #8a6d4b; line-height: 1.5; margin-bottom: 0.6rem; }

/* 塔库列表 */
.tower-card {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  width: 100%;
  text-align: left;
  background: #fff;
  border: 3px solid var(--ink);
  border-radius: 14px;
  padding: 0.45rem 0.6rem;
  margin-bottom: 0.5rem;
  cursor: pointer;
  box-shadow: 0 3px 0 var(--shadow);
  font-family: inherit;
  transition: transform 0.06s ease;
}
.tower-card:hover { transform: translateY(-1px); }
.tower-card:active { transform: translateY(2px); box-shadow: 0 1px 0 var(--shadow); }
.tower-card.selected { background: var(--gold); }
.tower-card.disabled { opacity: 0.5; cursor: not-allowed; }
.tower-card.disabled:hover { transform: none; }
.tower-card.disabled:active { transform: none; box-shadow: 0 3px 0 var(--shadow); }
.tower-icon {
  width: 40px; height: 40px;
  border: 2.5px solid var(--ink);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.35rem;
  flex-shrink: 0;
}
.tower-meta { flex: 1; min-width: 0; }
.tower-name { font-weight: 800; font-size: 0.92rem; }
.tower-cost { font-size: 0.8rem; color: #8a6d4b; }

/* 信息框 */
.info-box {
  background: #fff;
  border: 3px dashed var(--ink);
  border-radius: 12px;
  padding: 0.6rem;
  font-size: 0.8rem;
  line-height: 1.6;
  margin-top: 0.4rem;
  animation: fadeIn 0.15s ease;
}
.info-title { font-weight: 800; margin-bottom: 0.2rem; }
.info-desc { color: #6b554a; }
.info-desc .lv { font-weight: 800; color: var(--ink); }

/* 商店 / 声望列表 */
.shop-card, .prestige-card {
  background: #fff;
  border: 3px solid var(--ink);
  border-radius: 14px;
  padding: 0.55rem 0.65rem;
  margin-bottom: 0.55rem;
  transition: transform 0.06s ease, box-shadow 0.06s ease;
}
.shop-card:hover, .prestige-card:hover { transform: translateY(-1px); }
.shop-card:active, .prestige-card:active { transform: translateY(2px); box-shadow: 0 1px 0 var(--shadow); }
.shop-card .row, .prestige-card .row { display: flex; justify-content: space-between; align-items: center; gap: 0.4rem; }
.shop-name { font-weight: 800; font-size: 0.9rem; }
.shop-desc { font-size: 0.78rem; color: #6b554a; margin: 0.2rem 0 0.45rem; }
.shop-btn, .prestige-btn2 {
  font-family: inherit;
  font-weight: 800;
  font-size: 0.8rem;
  background: var(--gold);
  border: 2.5px solid var(--ink);
  border-radius: 10px;
  padding: 0.28rem 0.6rem;
  cursor: pointer;
  box-shadow: 0 3px 0 var(--ink);
  transition: transform 0.06s ease, box-shadow 0.06s ease, filter 0.12s ease;
}
.shop-btn:hover, .prestige-btn2:hover { filter: brightness(1.05); }
.shop-btn:active, .prestige-btn2:active { transform: translateY(3px); box-shadow: 0 0 0 var(--ink); }
.shop-btn:disabled, .prestige-btn2:disabled { opacity: 0.45; cursor: not-allowed; transform: none; box-shadow: 0 3px 0 var(--ink); }
.shop-btn:focus-visible, .prestige-btn2:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; }
.power-row { font-size: 0.9rem; margin-bottom: 0.6rem; }
#prestige-btn { width: 100%; margin-top: 0.3rem; }

/* 充值列表 */
.recharge-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  background: linear-gradient(135deg, #fff, #FFF6E3);
  border: 3px solid var(--ink);
  border-radius: 14px;
  padding: 0.5rem 0.6rem;
  margin-bottom: 0.55rem;
  box-shadow: 0 3px 0 var(--ink);
  transition: transform 0.06s ease, box-shadow 0.06s ease;
}
.recharge-card:hover { transform: translateY(-1px); }
.recharge-card:active { transform: translateY(2px); box-shadow: 0 1px 0 var(--ink); }
.recharge-hot { border-color: #FF8FB3; background: linear-gradient(135deg, #fff, #FFE9F1); }
.recharge-tag {
  position: absolute;
  top: -0.65rem;
  right: 0.8rem;
  background: #FF5A7A;
  color: #fff;
  font-size: 0.66rem;
  font-weight: 800;
  padding: 0.1rem 0.45rem;
  border-radius: 999px;
  border: 2px solid var(--ink);
}
.recharge-icon { font-size: 1.5rem; }
.recharge-meta { flex: 1; min-width: 0; }
.recharge-dust { font-size: 0.8rem; font-weight: 800; color: #B0742F; }
.recharge-dust small { font-weight: 600; color: #6b554a; }
.recharge-btn {
  font-family: inherit;
  font-weight: 900;
  font-size: 0.9rem;
  background: linear-gradient(135deg, #FFD166, #FFB347);
  color: var(--ink);
  border: 2.5px solid var(--ink);
  border-radius: 10px;
  padding: 0.3rem 0.7rem;
  cursor: pointer;
  box-shadow: 0 3px 0 var(--ink);
  white-space: nowrap;
  transition: transform 0.06s ease, box-shadow 0.06s ease;
}
.recharge-btn:active { transform: translateY(3px); box-shadow: 0 0 0 var(--ink); }
.recharge-btn:hover { filter: brightness(1.08); }
.recharge-btn:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; }
.recharge-total { font-size: 0.82rem; color: #6b554a; margin-top: 0.4rem; text-align: right; }
.recharge-note { font-size: 0.78rem; color: #6b554a; }
.pay-anim { font-size: 1.6rem; letter-spacing: 0.5rem; animation: payBounce 0.6s ease-in-out infinite; }
@keyframes payBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

/* 画布区 */
#board-wrap {
  flex: 1;
  position: relative;
  min-width: 0;
  background: #EAF6DA;
}
#board { width: 100%; height: 100%; display: block; cursor: default; }
#board.placing { cursor: crosshair; }

/* 漂浮面板（塔升级） */
.float-panel {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 210px;
  background: #fff;
  border: 3px solid var(--ink);
  border-radius: 14px;
  box-shadow: 5px 5px 0 var(--shadow);
  padding: 0.7rem;
  z-index: 10;
  animation: slideIn 0.18s ease;
}
@keyframes slideIn { from { opacity: 0; transform: translateX(12px); } to { opacity: 1; transform: translateX(0); } }
.float-panel .fp-title, #tower-panel-title { font-weight: 800; font-size: 1rem; margin-bottom: 0.3rem; }
.float-panel .fp-stats, #tower-panel-stats { font-size: 0.78rem; line-height: 1.55; color: #6b554a; margin-bottom: 0.55rem; }
.float-panel .btn { width: 100%; margin-bottom: 0.4rem; font-size: 0.88rem; }
.float-panel .btn:last-child { margin-bottom: 0; }

/* 波次横幅 */
.wave-banner {
  position: absolute;
  top: 38%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(255, 255, 255, 0.92);
  border: 4px solid var(--ink);
  border-radius: 16px;
  padding: 0.8rem 2rem;
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: 2px;
  z-index: 9;
  pointer-events: none;
  animation: pop 0.9s ease forwards;
}
@keyframes pop {
  0%   { opacity: 0; transform: translate(-50%, -40%) scale(0.6); }
  15%  { opacity: 1; transform: translate(-50%, -50%) scale(1.08); }
  25%  { transform: translate(-50%, -50%) scale(1); }
  75%  { opacity: 1; }
  100% { opacity: 0; }
}

/* 底部波次控制 */
#bottom-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  justify-content: center;
  padding: 0.5rem 0.9rem;
  background: var(--cream-2);
  border-top: 4px solid var(--ink);
}
#wave-status { font-weight: 700; font-size: 0.9rem; color: #6b554a; }

/* ---------------- 弹窗 ---------------- */
.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(59, 46, 42, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  animation: fadeInBackdrop 0.2s ease;
}
@keyframes fadeInBackdrop { from { opacity: 0; } to { opacity: 1; } }
.modal-card {
  background: #fff;
  border: 4px solid var(--ink);
  border-radius: 20px;
  box-shadow: 8px 8px 0 var(--shadow);
  padding: 1.6rem 2rem;
  max-width: 440px;
  width: 90%;
  text-align: center;
  animation: slideup 0.25s ease;
}
@keyframes slideup {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
.modal-card h2 { margin: 0 0 0.6rem; }
.modal-card p { line-height: 1.7; color: #6b554a; margin: 0.3rem 0; }
.modal-card .big-num { font-size: 1.4rem; font-weight: 900; color: var(--ink); }
.modal-card .btn { margin-top: 1rem; }
.modal-card .btn:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; }
.modal-card .row { display: flex; justify-content: space-between; gap: 0.6rem; }
.modal-card .row .btn { flex: 1; }

/* 飘字（画布内浮动数字，DOM 层） */
.float-num {
  position: absolute;
  font-weight: 900;
  font-size: 1rem;
  color: var(--gold-dark);
  text-shadow: 1px 1px 0 #fff, -1px -1px 0 #fff, 1px -1px 0 #fff, -1px 1px 0 #fff;
  pointer-events: none;
  z-index: 8;
  animation: floatUp 0.9s ease forwards;
}
@keyframes floatUp {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(-34px); }
}

/* 滚动条 */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-thumb { background: var(--ink); border-radius: 8px; }
::-webkit-scrollbar-track { background: transparent; }