/* ═══════════════════════════════════════════════════
   墨庭 Ink Garden — 水墨风格样式
   ═══════════════════════════════════════════════════ */

/* ── 重置与基础 ───────────────────────────────── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --paper: #e9ebdf;
  --ink-black: #161819;
  --ink-gray: #3a3a3a;
  --ink-light: #6b6b6b;
  --gold: #b8976a;
  --gold-dark: #8a6d4a;
  --seal-red: #a03828;
  --hud-bg: rgba(233, 235, 223, 0.92);
  --hud-border: rgba(22, 24, 25, 0.12);
  --hud-hover: rgba(22, 24, 25, 0.08);
  --transition: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  position: fixed;
  inset: 0;
  background: var(--paper);
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  color: var(--ink-black);
  -webkit-font-smoothing: antialiased;
  cursor: crosshair;
  user-select: none;
  -webkit-user-select: none;
}

/* ── Canvas 层 ────────────────────────────────── */
.garden {
  position: fixed;
  inset: 0;
  overflow: hidden;
}

.layer {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  display: block;
}

.surface {
  z-index: 10;
  pointer-events: auto;
}

.fish-layer {
  z-index: 20;
  pointer-events: none;
}

/* ── 标题 ──────────────────────────────────────── */
.title {
  position: fixed;
  top: 2.5rem;
  left: 2.5rem;
  z-index: 20;
  pointer-events: none;
  opacity: 0;
  animation: fadeIn 2s var(--transition) 0.5s forwards;
}

.title .seal {
  font-family: "Georgia", serif;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--ink-light);
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}

.title h1 {
  font-size: 2.8rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  color: var(--ink-black);
  line-height: 1;
}

/* ── 装饰元素 ──────────────────────────────────── */
.poem {
  position: fixed;
  top: 50%;
  right: 2.5rem;
  z-index: 20;
  writing-mode: vertical-rl;
  font-size: 0.85rem;
  color: var(--ink-light);
  letter-spacing: 0.5em;
  opacity: 0;
  animation: fadeIn 2s var(--transition) 1.5s forwards;
  pointer-events: none;
}

.corner-mark {
  position: fixed;
  width: 30px;
  height: 30px;
  z-index: 20;
  pointer-events: none;
  opacity: 0;
  animation: fadeIn 2s var(--transition) 1s forwards;
}

.corner-mark-tl {
  top: 1.8rem;
  left: 1.8rem;
  border-top: 1.5px solid var(--gold);
  border-left: 1.5px solid var(--gold);
}

.corner-mark-br {
  bottom: 1.8rem;
  right: 1.8rem;
  border-bottom: 1.5px solid var(--gold);
  border-right: 1.5px solid var(--gold);
}

.seal-mark {
  position: fixed;
  bottom: 2.5rem;
  left: 2.5rem;
  z-index: 20;
  width: 2.2rem;
  height: 2.2rem;
  border: 1.5px solid var(--seal-red);
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--seal-red);
  opacity: 0;
  animation: fadeIn 2s var(--transition) 2s forwards;
  pointer-events: none;
}

/* ── 工具栏 HUD ────────────────────────────────── */
.hud {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  background: var(--hud-bg);
  border: 1px solid var(--hud-border);
  border-radius: 1rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
  opacity: 0;
  animation: slideUp 1s var(--transition) 0.8s forwards;
}

.divider {
  width: 1px;
  height: 1.6rem;
  background: var(--hud-border);
  margin: 0 0.2rem;
}

/* 墨色芯片 */
.palette {
  display: flex;
  gap: 0.4rem;
}

.chip {
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 50%;
  border: 2px solid transparent;
  background: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.3s var(--transition), transform 0.2s var(--transition);
  padding: 0;
}

.chip span {
  display: block;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: var(--chip);
}

.chip.active {
  border-color: var(--chip);
}

.chip:hover {
  transform: scale(1.15);
}

/* 工具按钮 */
.tools, .actions {
  display: flex;
  gap: 0.25rem;
}

.tool, .action {
  width: 2rem;
  height: 2rem;
  border-radius: 0.5rem;
  border: none;
  background: none;
  font-family: inherit;
  font-size: 0.85rem;
  color: var(--ink-gray);
  cursor: pointer;
  transition: background 0.2s var(--transition), color 0.2s var(--transition), transform 0.15s var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.tool:hover, .action:hover {
  background: var(--hud-hover);
  color: var(--ink-black);
}

.tool.active {
  background: var(--ink-black);
  color: var(--paper);
}

.tool:active, .action:active {
  transform: scale(0.92);
}

/* ── 状态提示 ──────────────────────────────────── */
.status {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 25;
  font-size: 1.1rem;
  color: var(--ink-light);
  letter-spacing: 0.2em;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.6s var(--transition);
}

.status.show {
  opacity: 1;
}

/* ── 降级提示 ──────────────────────────────────── */
.fallback {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 100;
  text-align: center;
  padding: 2rem;
}

.fallback h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  font-weight: 400;
}

.fallback p {
  color: var(--ink-light);
  font-size: 0.95rem;
}

/* ── 动画 ──────────────────────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

/* ── 响应式 ────────────────────────────────────── */
@media (max-width: 640px) {
  .title { top: 1.5rem; left: 1.5rem; }
  .title h1 { font-size: 2rem; }
  .poem { right: 1.5rem; font-size: 0.75rem; }
  .corner-mark-tl { top: 1rem; left: 1rem; }
  .corner-mark-br { bottom: 1rem; right: 1rem; }
  .seal-mark { bottom: 1.5rem; left: 1.5rem; }

  .hud {
    bottom: 1rem;
    padding: 0.5rem 0.7rem;
    gap: 0.35rem;
    border-radius: 0.8rem;
  }

  .chip { width: 1.5rem; height: 1.5rem; }
  .chip span { width: 0.8rem; height: 0.8rem; }
  .tool, .action { width: 1.7rem; height: 1.7rem; font-size: 0.75rem; }
  .divider { height: 1.2rem; }
}

/* ── 减弱动画偏好 ──────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}