/* ═══════════════════════════════════════════
   锦书之约 v3
   ═══════════════════════════════════════════ */

.section-title {
  text-align: center;
  font-weight: 400;
  font-size: 1.1rem;
  letter-spacing: 0.14em;
  color: var(--ink);
  margin-bottom: var(--space-lg);
}

.section-subtitle {
  font-weight: 400;
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  color: var(--ink-light);
  margin: var(--space-xl) 0 var(--space-sm);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--hairline);
}

/* ── 约定卡片 ── */
.covenant-card {
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
  animation: revealIn var(--dur-slow) var(--ease-enter) both;
}

.covenant-title {
  font-size: 1.15rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  color: var(--ink);
  margin-bottom: var(--space-md);
  line-height: 1.4;
}

.partners {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-md);
  margin: var(--space-lg) 0;
  flex-wrap: wrap;
}

.partner {
  font-size: 0.92rem;
  color: var(--ink-soft);
  padding: 8px 18px;
  background: var(--paper);
  border-radius: var(--radius-md);
  border: 1px solid var(--hairline-strong);
  min-width: 92px;
  text-align: center;
  word-break: break-word;
}

.partner-waiting {
  color: var(--ink-fade);
  border-style: dashed;
  font-style: italic;
}

/* 双心：用 SVG 而非 emoji */
.partner-heart {
  position: relative;
  width: 26px;
  height: 26px;
  flex-shrink: 0;
  animation: heartPulse 2.4s ease-in-out infinite;
}

.partner-heart::before,
.partner-heart::after {
  content: '';
  position: absolute;
  width: 11px;
  height: 17px;
  border-radius: 11px 11px 0 0;
  background: var(--seal);
  top: 3px;
  transform-origin: 50% 100%;
}

.partner-heart::before {
  left: 12px;
  transform: rotate(-45deg);
}

.partner-heart::after {
  left: 3px;
  transform: rotate(45deg);
}

@keyframes heartPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.12); }
}

.covenant-status {
  font-size: 0.82rem;
  color: var(--ink-fade);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  letter-spacing: 0.04em;
}

.covenant-status .icon {
  width: 1em;
  height: 1em;
  color: var(--seal);
}

/* ── 邀请码 ── */
.invite-code {
  font-family: ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 1.3rem;
  color: var(--seal-dark);
  letter-spacing: 0.25em;
  margin: var(--space-md) 0 4px;
  padding: 12px 24px;
  background: var(--seal-glow);
  border: 1px dashed var(--seal);
  border-radius: var(--radius-md);
  display: inline-block;
  cursor: pointer;
  user-select: all;
  font-weight: 500;
  min-height: var(--touch-min);
  transition: background var(--dur-fast) var(--ease-standard),
              border-color var(--dur-fast) var(--ease-standard);
}

.invite-code:hover {
  background: var(--seal-glow-strong);
  border-color: var(--seal-dark);
}

.invite-code:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 3px;
}

.invite-hint {
  font-size: 0.74rem;
  color: var(--ink-fade);
  margin-top: 2px;
}

/* ── 弹窗内信件列表 ── */
.covenant-letters {
  margin-top: var(--space-sm);
  max-height: 200px;
  overflow-y: auto;
}

.covenant-letter-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm);
  padding: 10px 0;
  border-bottom: 1px solid var(--hairline);
}

.covenant-letter-item:last-child { border-bottom: none; }

.covenant-letter-item .cl-title {
  font-size: 0.88rem;
  color: var(--ink-soft);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.covenant-letter-item .cl-time {
  font-size: 0.75rem;
  color: var(--ink-fade);
  white-space: nowrap;
  flex-shrink: 0;
}

.no-letters {
  text-align: center;
  color: var(--ink-fade);
  font-size: 0.85rem;
  padding: var(--space-md) 0;
}

/* ── 移动端 ── */
@media (max-width: 640px) {
  .partners {
    gap: var(--space-sm);
  }

  .partner {
    font-size: 0.85rem;
    padding: 7px 14px;
    min-width: 78px;
  }

  .invite-code {
    font-size: 1.1rem;
    letter-spacing: 0.18em;
    padding: 10px 18px;
  }

  .covenant-card { padding: var(--space-lg) var(--space-md); }

  .covenant-letter-item {
    flex-wrap: wrap;
    gap: var(--space-xs);
  }
}