/* =============================================================
 * Series · Perplex 主题（08 · Aravind Srinivas · Perplexity）
 * 主题色：teal #20d4d4 + blue #3b82f6，高亮 #fde047
 * 模型与 06 nexus 一致 —— 浅色背景版（清亮、信息密集）
 * ============================================================= */

.issue-card.issue-perplex-theme {
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(32, 212, 212, 0.10) 0%, rgba(32, 212, 212, 0) 55%),
    radial-gradient(100% 120% at 0% 100%, rgba(59, 130, 246, 0.08) 0%, rgba(59, 130, 246, 0) 55%),
    linear-gradient(160deg, #ffffff 0%, #f5fbfb 60%, #eaf5fb 100%);
  border-color: rgba(32, 212, 212, 0.22);
  box-shadow:
    0 24px 60px -30px rgba(32, 212, 212, 0.30),
    0 0 0 1px rgba(32, 212, 212, 0.15);
  color: #1f2937;
}

.issue-perplex-theme .issue-card-inner {
  position: relative;
  overflow: hidden;
}
.issue-perplex-theme .issue-card-inner::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(32, 212, 212, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(32, 212, 212, 0.045) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
  z-index: 0;
}
.issue-perplex-theme .issue-card-inner::after {
  content: "";
  position: absolute;
  bottom: -90px; left: -60px;
  width: 280px; height: 280px;
  background: radial-gradient(circle, rgba(32, 212, 212, 0.20) 0%, transparent 65%);
  filter: blur(8px);
  pointer-events: none;
  z-index: 0;
}
.issue-perplex-theme .issue-card-inner > * {
  position: relative;
  z-index: 1;
}

/* 文字色（浅背景） */
.issue-perplex-theme .meta-pm-name { color: #1f2937; }
.issue-perplex-theme .meta-pm-role { color: #4b5563; }
.issue-perplex-theme .issue-title { color: #1f2937; }
.issue-perplex-theme .issue-subtitle { color: #4b5563; }
.issue-perplex-theme .issue-excerpt { color: #4b5563; }
.issue-perplex-theme .issue-excerpt strong {
  color: #0c2461;
  background: rgba(32, 212, 212, 0.20);
  padding: 1px 4px;
  border-radius: 2px;
  font-weight: 600;
}
.issue-perplex-theme .issue-readtime,
.issue-perplex-theme .issue-date { color: #6b7280; }
.issue-perplex-theme .kw {
  background: rgba(32, 212, 212, 0.10);
  color: #178c85;
  border-color: rgba(32, 212, 212, 0.30);
}
.issue-perplex-theme .issue-meta {
  border-bottom-color: rgba(32, 212, 212, 0.25);
}

/* 标签 / 按钮 */
.tag-issue-perplex {
  background: linear-gradient(135deg, #20d4d4 0%, #3b82f6 100%);
  color: #ffffff;
  border: none;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.btn-primary-perplex {
  background: linear-gradient(135deg, #20d4d4 0%, #3b82f6 100%);
  color: #ffffff;
  border: none;
  font-weight: 700;
  box-shadow:
    0 10px 24px -10px rgba(32, 212, 212, 0.55),
    inset 0 1px 0 rgba(255, 255, 255, 0.25);
}
.btn-primary-perplex:hover {
  transform: translateY(-1px);
  background: linear-gradient(135deg, #5eead4 0%, #2563eb 100%);
  box-shadow:
    0 14px 30px -10px rgba(59, 130, 246, 0.65),
    inset 0 1px 0 rgba(255, 255, 255, 0.30);
}

.issue-perplex-theme .btn-secondary {
  background: rgba(255, 255, 255, 0.7);
  color: #1f2937;
  border-color: rgba(32, 212, 212, 0.35);
}
.issue-perplex-theme .btn-secondary:hover {
  background: rgba(32, 212, 212, 0.08);
  color: #178c85;
  border-color: #20d4d4;
}

/* =============================================================
 * 头像「白板便签」风 · Perplex 适配
 * ============================================================= */
.issue-perplex-theme .avatar-frame.avatar-frame-perplex-light::before {
  background: #ffffff;
  border-color: rgba(32, 212, 212, 0.45);
  box-shadow: inset 0 0 0 1px rgba(59, 130, 246, 0.15);
}
.issue-perplex-theme .avatar-frame.avatar-frame-perplex-light::after {
  background: radial-gradient(circle at 35% 35%, #5eead4, #20d4d4);
  box-shadow:
    inset -1px -1px 2px rgba(0, 0, 0, 0.18),
    0 2px 6px rgba(32, 212, 212, 0.45);
}
.issue-perplex-theme .avatar-frame.avatar-frame-perplex-light .avatar-img-wrap {
  background: #f5fbfb;
  box-shadow: 0 6px 22px rgba(32, 212, 212, 0.25);
}
.issue-perplex-theme .avatar-corner-quote.avatar-corner-perplex-light {
  background: linear-gradient(135deg, #20d4d4 0%, #3b82f6 100%);
  color: #ffffff;
  font-family: 'Caveat', cursive;
  font-weight: 800;
  letter-spacing: 0.02em;
  box-shadow: 0 6px 16px -6px rgba(32, 212, 212, 0.55);
  border: 1px solid rgba(59, 130, 246, 0.30);
}