/**
 * WPDevBase - Core Design Tokens & Micro-Animations (Light & Crisp Theme)
 * Version: 1.1.0
 * High Contrast / Modern Tech Clean / 120Hz Hardware Accelerated
 */

:root {
  /* ==========================================================================
     1. 清爽明亮色板 (High-Contrast Clean White Theme)
     ========================================================================== */
  --bg-primary: #f8fafc;          /* 干净清爽的冷白背景 (Slate 50) */
  --bg-secondary: #ffffff;        /* 纯白卡片底色 (Pure White) */
  --bg-elevated: #f1f5f9;         /* 浅灰悬浮/按钮/输入框 (Slate 100) */
  --bg-glass: rgba(255, 255, 255, 0.88); /* 毛玻璃顶栏半透明白 */

  --border-subtle: #e2e8f0;       /* 极其清晰干净的 1px 细线边框 (Slate 200) */
  --border-active: #cbd5e1;       /* 聚焦/悬停边框 (Slate 300) */

  --text-main: #0f172a;           /* 极高对比深墨黑正文字体 (Slate 900 - 极其清晰) */
  --text-muted: #475569;          /* 清晰的中灰色辅助文字 (Slate 600) */
  --text-dim: #64748b;            /* 时间与低频标签 (Slate 500) */

  /* 核心渐变品牌色 (保持高活力的电光紫到深青蓝) */
  --gradient-brand: linear-gradient(135deg, #6366f1 0%, #0284c7 100%);
  --gradient-glow: radial-gradient(circle at 50% 0%, rgba(99, 102, 241, 0.08), transparent 70%);

  /* 状态指示色 (明亮对比版) */
  --status-solved: #059669;       /* 翡翠深绿 */
  --status-solved-bg: #ecfdf5;    /* 极浅柔和绿底 */
  --status-pending: #d97706;      /* 暖琥珀橙 */
  --status-pending-bg: #fffbeb;

  /* ==========================================================================
     2. 字体与排印
     ========================================================================== */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Inter", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", monospace;

  /* ==========================================================================
     3. 动效缓动曲线
     ========================================================================== */
  --ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --trans-fast: 0.15s var(--ease-smooth);
  --trans-spring: 0.25s var(--ease-spring);
}

/* 全局重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
}

/* 顶部极浅环境微光 */
body::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 1200px;
  height: 480px;
  background: var(--gradient-glow);
  pointer-events: none;
  z-index: 0;
}

/* ==========================================================================
   4. 触感动效类
   ========================================================================== */

/* 点击物理回弹 */
.btn-press {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--trans-fast), background var(--trans-fast), border-color var(--trans-fast), box-shadow var(--trans-fast);
  cursor: pointer;
  user-select: none;
}
.btn-press:active {
  transform: scale(0.96);
}

/* 渐变主按钮 */
.btn-primary {
  background: var(--gradient-brand);
  color: #ffffff;
  font-weight: 600;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  padding: 10px 20px;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.25);
}
.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.35);
  transform: translateY(-1px);
}

/* 卡片立体浮起 + 柔和科技阴影 */
.card-hover {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  transition: transform var(--trans-spring), border-color var(--trans-spring), box-shadow var(--trans-spring);
  contain: layout paint;
}
.card-hover:hover {
  transform: translateY(-3px);
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow: 0 12px 28px -6px rgba(15, 23, 42, 0.08), 0 0 12px rgba(99, 102, 241, 0.1);
}

/* 状态呼吸灯 */
.pulse-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 9999px;
}
.pulse-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  animation: pulse-ring 2s infinite ease-in-out;
}

.pulse-badge-solved {
  color: var(--status-solved);
  background: var(--status-solved-bg);
  border: 1px solid #a7f3d0;
}
.pulse-badge-solved::before {
  background-color: var(--status-solved);
}

@keyframes pulse-ring {
  0% { transform: scale(0.95); opacity: 0.6; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.6; }
}

/* 关键词渐变文字 */
.text-gradient {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}