/* ink.css — 六套动效语汇 + 墨色视觉元件 */

/* —— 涟漪（落 ink-down 用） —— */
.ink-ripple {
  position: absolute; width: 120px; height: 120px; border-radius: 50%;
  transform: translate(-50%,-50%);
  background: radial-gradient(circle, rgba(42,38,32,.16), rgba(42,38,32,0) 70%);
  pointer-events: none;
}

/* —— 墨色呼吸（加载/等待，绝不 spinner） —— */
@keyframes ink-breath { 0%,100% { opacity: .32; } 50% { opacity: .85; } }
.breathing { animation: ink-breath var(--breath) var(--ease) infinite; }
@keyframes ink-grind { 0% { opacity: .3; filter: blur(.5px);} 50%{opacity:.9; filter:blur(0);} 100%{opacity:.3; filter:blur(.5px);} }
.grinding { animation: ink-grind 2.6s var(--ease) infinite; } /* 研墨渐浓 */
@media (prefers-reduced-motion: reduce) {
  .breathing, .grinding { animation-duration: 3.4s; }
}

/* —— 一滴墨（录音主键） —— */
.ink-drop {
  position: relative; width: 70px; height: 70px; border-radius: 50%;
  background: radial-gradient(circle at 38% 34%, #4a443c 0%, #211e18 46%, #14110d 100%);
  box-shadow: 0 6px 16px rgba(20,16,12,.4), inset 0 2px 4px rgba(255,255,255,.06);
  display: grid; place-items: center;
  touch-action: none; user-select: none;
  transition: transform .18s var(--ease);
}
.ink-drop::after { /* 朱砂笔尖 */
  content: ''; position: absolute; right: 14px; top: 16px;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--cinnabar); opacity: .9;
}
.ink-drop.recording { transform: scale(1.04); }
.ink-drop .halo {
  position: absolute; inset: -10px; border-radius: 50%;
  background: radial-gradient(circle, rgba(42,38,32,.28), rgba(42,38,32,0) 70%);
  transform: scale(1); pointer-events: none; opacity: 0;
}
@keyframes drop-breathe { 0%,100%{ transform: scale(1);} 50%{ transform: scale(1.035);} }
.ink-drop.idle { animation: drop-breathe 2.6s var(--ease) infinite; }

/* —— 朱砂印 按钮（钤·确认类） —— */
.seal-btn {
  position: relative; display: inline-flex; align-items: center; justify-content: center;
  min-width: 96px; min-height: var(--tap-min);
  padding: 13px 26px;
  color: #f6ece0; font-size: var(--fs-lead); letter-spacing: 4px; font-weight: 500;
  background: var(--cinnabar);
  border-radius: 5px;
  box-shadow: 0 3px 0 rgba(120,28,18,.45), 0 6px 16px rgba(120,28,18,.25);
  transition: transform .14s var(--ease), opacity .3s var(--ease);
  /* 朱砂印边缘的墨迹不匀 */
  -webkit-mask-image: var(--seal-mask, none);
}
.seal-btn::before {
  content:''; position:absolute; inset:0; border-radius:5px;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='80' height='40'><filter id='r'><feTurbulence type='fractalNoise' baseFrequency='0.6' numOctaves='2'/><feColorMatrix type='saturate' values='0'/></filter><rect width='100%25' height='100%25' filter='url(%23r)' opacity='0.12'/></svg>");
  mix-blend-mode: screen; opacity:.5; pointer-events:none;
}
.seal-btn:active { transform: scale(.96); }
.seal-btn[disabled], .seal-btn.disabled {
  background: transparent; color: var(--ink-faint);
  box-shadow: none; border: 1px solid var(--ink-hair);
  letter-spacing: 4px; cursor: default;
}

/* —— 小朱砂印记（乔/藏/朱/申请 等钤角） —— */
.seal-mark {
  display: inline-grid; place-items: center;
  width: 26px; height: 26px; border-radius: 3px;
  background: var(--cinnabar); color: #f6ece0;
  font-size: 13px; line-height: 1; font-family: var(--font-serif);
}
.seal-mark.faded { background: transparent; color: var(--cinnabar-soft); border: 1px solid var(--cinnabar-faint); }

/* —— 朱砂竖线小楷批注（乔安） —— */
.annotation {
  position: relative; padding-left: 16px;
  font-family: var(--font-kai); color: var(--ink-mid); line-height: 1.9;
  font-size: var(--fs-body);
}
.annotation::before {
  content:''; position:absolute; left:0; top:2px; bottom:2px; width:2.5px;
  background: var(--cinnabar); border-radius: 2px; opacity:.92;
}
.annotation .who { color: var(--cinnabar-soft); font-size: var(--fs-small); letter-spacing: 1px; }

/* —— 横格输入 —— */
.grid-field { position: relative; padding: 10px 2px 9px; }
.grid-field input {
  width: 100%; font-size: var(--fs-lead); color: var(--ink); letter-spacing: 1px;
  background: transparent; padding: 4px 0;
}
.grid-field input::placeholder { color: var(--ink-faint); letter-spacing: 1px; }
.grid-field .line {
  position: absolute; left: 0; right: 0; bottom: 4px; height: 1px;
  background: var(--ink-hair); transition: background .24s var(--ease), height .24s var(--ease);
}
.grid-field.focus .line { background: var(--ink-hair-2); height: 1.5px; }
.grid-field .hint { /* 信边淡墨小字 */
  font-size: var(--fs-small); color: var(--ink-light); margin-top: 6px; min-height: 16px;
}

/* —— 信纸卡（折角 dog-ear） —— */
.paper-card {
  position: relative; background: var(--paper);
  border: 1px solid var(--ink-hair);
  border-radius: 2px;
  padding: 16px 18px;
  box-shadow: 0 1px 0 var(--paper-shadow);
}
.paper-card.notch { clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%); }
.paper-card.notch::after {
  content:''; position:absolute; right:0; top:0; width:18px; height:18px;
  background: linear-gradient(225deg, var(--paper-edge) 0 50%, transparent 50%);
}
.paper-card:active { box-shadow: inset 0 1px 6px var(--paper-shadow); }

/* —— Toast：一行墨迹自下淡入，停 2.4s 后干涸 —— */
.toast-layer { position: absolute; left:0; right:0; bottom: 96px; display:flex; justify-content:center; pointer-events:none; z-index: 40; }
.toast {
  font-size: var(--fs-small); color: var(--ink-mid); font-family: var(--font-serif);
  letter-spacing: 1px; background: rgba(241,233,214,.86); padding: 8px 16px; border-radius: 20px;
  box-shadow: 0 2px 10px var(--paper-shadow);
}

/* —— 底部弹层（展 unfurl from bottom） —— */
.sheet-scrim { position: absolute; inset:0; background: rgba(30,26,21,.18); z-index: 60; }
.sheet {
  position: absolute; left:0; right:0; bottom:0; z-index: 61;
  background: var(--paper); border-radius: 18px 18px 0 0;
  box-shadow: 0 -8px 30px rgba(20,16,12,.28);
  padding: 14px 22px 28px; max-height: 86%;
  overflow-y: auto;
}
.sheet .grip { width: 42px; height: 4px; border-radius: 3px; background: var(--ink-hair-2); margin: 2px auto 14px; }

/* —— 分段切换：朱砂指示线 —— */
.segmented { display:flex; position:relative; gap: 0; }
.segmented .seg {
  flex:1; text-align:center; padding: 10px 4px; font-size: var(--fs-body);
  color: var(--ink-faint); letter-spacing: 2px; position: relative; transition: color .26s var(--ease);
}
.segmented .seg.active { color: var(--ink-strong); }
.segmented .indicator {
  position:absolute; bottom:0; height:2px; background: var(--cinnabar); border-radius:2px;
  transition: left .26s var(--ease), width .26s var(--ease);
}

/* —— 顶栏 —— */
.topbar { display:flex; align-items:center; gap: 8px; padding: 8px var(--pad-screen); min-height: 48px; flex:none; }
.topbar .back { width: 40px; height: 40px; display:grid; place-items:center; color: var(--ink-light); }
.topbar .title { flex:1; text-align:center; color: var(--ink-light); font-size: var(--fs-body); letter-spacing: 4px; }
.topbar .right { width: 40px; display:flex; justify-content:flex-end; }
.back-arrow { width: 20px; height: 20px; }

/* —— 底部 tab —— */
.tabbar {
  display:flex; flex:none; border-top: 1px solid var(--ink-hair);
  padding: 10px 0 calc(10px + env(safe-area-inset-bottom));
  background: var(--paper);
}
.tabbar .tab { flex:1; text-align:center; color: var(--ink-faint); font-size: var(--fs-body); letter-spacing: 4px; position: relative; padding: 6px 0; }
.tabbar .tab.active { color: var(--ink-strong); }
.tabbar .tab.active::after { content:''; position:absolute; left:50%; bottom:-2px; transform:translateX(-50%); width:18px; height:2px; background: var(--cinnabar); border-radius:2px; }

/* —— 墨痕播放条 —— */
.ink-trace { position: relative; width: 100%; height: 40px; touch-action: none; }
.ink-trace .wave { width:100%; height:100%; display:block; }
.ink-trace .head { transition: none; }

/* —— Hero 标题 —— */
.hero { font-size: var(--fs-hero); color: var(--ink-strong); letter-spacing: 3px; font-weight: 600; line-height: 1.5; }
.lead { font-size: var(--fs-lead); color: var(--ink-strong); letter-spacing: 2px; }
.subtle { color: var(--ink-light); font-size: var(--fs-small); letter-spacing: 1px; line-height: 1.8; }
.faint { color: var(--ink-faint); }
.center { text-align:center; }

/* —— 页脚极淡小字 —— */
.foot-note { color: var(--ink-faint); font-size: var(--fs-mini); letter-spacing: 2px; text-align:center; }

/* —— 主操作区（底部拇指区） —— */
.thumb-zone { margin-top:auto; padding: 18px var(--pad-screen) calc(22px + env(safe-area-inset-bottom)); display:flex; flex-direction:column; align-items:center; gap: 14px; flex:none; }

/* 信纸正文 */
.letter-body { font-size: var(--fs-body); line-height: var(--lh-body); color: var(--ink); letter-spacing: .5px; }
.letter-body p { margin: 0 0 16px; }