:root {
  --bg: #12061c;
  --ink: #fff6f0;
  --mute: #d7c2d8;
  --rose: #ff6b9d;
  --gold: #ffd39a;
  --paper: rgba(24, 10, 36, 0.72);
  --line: rgba(255, 211, 154, 0.22);
  --font-display: "Ma Shan Zheng", "Kaiti SC", "STKaiti", "KaiTi", cursive;
  --font-letter: "ZCOOL XiaoWei", "Kaiti SC", "KaiTi", "PingFang SC", serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

*,
*::before,
*::after { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
}

body {
  min-height: 100dvh;
}

.aurora {
  position: fixed;
  inset: -20%;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 50% 40% at 18% 18%, rgba(199, 125, 255, 0.32), transparent 55%),
    radial-gradient(ellipse 45% 35% at 82% 12%, rgba(255, 107, 157, 0.28), transparent 55%),
    radial-gradient(ellipse 50% 40% at 50% 100%, rgba(76, 201, 240, 0.12), transparent 55%);
  filter: blur(24px);
}

.gate,
#app {
  position: relative;
  z-index: 1;
}

.gate {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.gate-card,
.card {
  width: min(92vw, 440px);
  padding: 28px 24px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--paper);
  backdrop-filter: blur(16px);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

.gate-card { text-align: center; }

.eyebrow {
  margin: 0 0 10px;
  color: var(--gold);
  letter-spacing: 0.28em;
  font-size: 12px;
}

.eyebrow.tiny { letter-spacing: 0.18em; }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 400;
  margin: 0 0 12px;
}

h1 { font-size: clamp(36px, 8vw, 54px); }
h2 { font-size: 28px; margin: 0; }
h3 { font-size: 24px; }

.lead, .hint, .remain-sub {
  color: var(--mute);
  line-height: 1.8;
}

.lead { margin: 0 0 22px; }

.stack, .form-card, label {
  display: grid;
  gap: 12px;
}

label span {
  display: block;
  margin-bottom: 6px;
  color: var(--gold);
  font-size: 13px;
}

input, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(8, 2, 16, 0.45);
  color: var(--ink);
  padding: 12px 14px;
  font: inherit;
}

textarea { resize: vertical; }

input[type="range"] {
  padding: 0;
  accent-color: var(--rose);
}

.btn-glow,
.btn-ghost,
.btn-mini {
  appearance: none;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  font: inherit;
}

.btn-glow {
  padding: 12px 22px;
  color: #2a1020;
  background: linear-gradient(180deg, #ffe6c7, #ffb3c6);
  letter-spacing: 0.16em;
}

.btn-ghost,
.btn-mini {
  padding: 8px 14px;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
}

.form-error {
  color: #ff8fab;
  min-height: 1.4em;
  margin: 0;
}

#app {
  width: min(920px, 100%);
  margin: 0 auto;
  padding: 20px 16px 80px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.topbar-actions { display: flex; gap: 8px; }

.hero-stat {
  text-align: center;
  margin: 28px 0 18px;
}

.remain {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(56px, 14vw, 92px);
  line-height: 1;
  background: linear-gradient(120deg, #fff, #ffd39a, #ff6b9d);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.remain small {
  margin-left: 8px;
  font-size: 0.28em;
  letter-spacing: 0.2em;
  vertical-align: 18%;
}

.tabs {
  display: flex;
  gap: 8px;
  margin: 8px 0 18px;
}

.tab {
  flex: 1;
  padding: 10px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--mute);
  cursor: pointer;
  font: inherit;
}

.tab.is-on {
  color: #2a1020;
  background: linear-gradient(180deg, #ffe6c7, #ffb3c6);
}

.badge {
  display: inline-grid;
  place-items: center;
  min-width: 18px;
  height: 18px;
  margin-left: 4px;
  border-radius: 99px;
  background: #ff4d7a;
  color: #fff;
  font-size: 11px;
}

.panel { display: none; }
.panel.is-on { display: block; }

.form-card { width: 100%; margin-bottom: 16px; }

.list { display: grid; gap: 12px; }

.item {
  padding: 18px 18px 14px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--paper);
}

.item header {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: baseline;
}

.meta {
  color: var(--gold);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.reason, .note, .whisper-body, .comment-body, .letter-content {
  font-family: var(--font-letter);
  font-size: 18px;
  line-height: 1.8;
  white-space: pre-wrap;
  margin: 10px 0 0;
}

.envelope {
  appearance: none;
  width: 100%;
  text-align: left;
  color: inherit;
  font: inherit;
  cursor: pointer;
  padding: 18px 18px 16px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--paper);
}

.envelope.is-unread {
  box-shadow: 0 0 28px rgba(255, 107, 157, 0.22);
}

.envelope.is-read {
  opacity: 0.78;
}

.envelope-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.envelope-seal {
  flex: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-size: 16px;
  color: #ffe1c4;
  background: radial-gradient(circle at 32% 28%, #ff8a8a, #9b1d3a 62%, #5a1024);
}

.envelope.is-read .envelope-seal {
  background: radial-gradient(circle at 32% 28%, #d7c2d8, #5a4060 70%);
  color: #fff6f0;
}

.envelope-preview {
  margin: 10px 0 0;
  color: var(--mute);
  font-family: var(--font-letter);
  font-size: 16px;
}

.envelope-cta {
  margin: 12px 0 0;
  color: var(--gold);
  font-size: 12px;
  letter-spacing: 0.16em;
}

.letter-overlay {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(8, 2, 16, 0.72);
  backdrop-filter: blur(10px);
}

.letter-sheet {
  width: min(92vw, 480px);
  max-height: min(80dvh, 640px);
  overflow: auto;
  padding: 28px 24px 22px;
  border-radius: 8px 18px 10px 8px;
  background:
    linear-gradient(180deg, rgba(255, 248, 240, 0.97), rgba(255, 236, 220, 0.95));
  color: #4a2b3a;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}

.letter-kicker,
.letter-date {
  margin: 0;
  color: #a07878;
  letter-spacing: 0.12em;
  font-size: 12px;
}

.letter-content {
  color: #4a2b3a;
  min-height: 6em;
  margin: 16px 0 22px;
}

.letter-sheet .btn-glow {
  width: 100%;
}

.count-pill {
  color: #ffd1dc;
  font-size: 14px;
}

.comments { margin-top: 12px; padding-top: 10px; border-top: 1px dashed var(--line); }
.comment { margin: 8px 0; }
.comment-form { display: grid; grid-template-columns: 1fr auto; gap: 8px; margin-top: 10px; }
.empty { color: var(--mute); text-align: center; padding: 28px 8px; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  z-index: 20;
  transform: translateX(-50%);
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(18, 6, 28, 0.92);
  border: 1px solid var(--line);
}

[hidden] { display: none !important; }

@media (max-width: 720px) {
  .comment-form { grid-template-columns: 1fr; }
  .topbar-actions .btn-ghost { padding: 8px 10px; }
}