/* ==========================================================================
   Base Styles - OpenDev Platform
   科技感深色主题 - Tech Dark Theme
   ========================================================================== */

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* 主色调 - 科技感深色主题 */
  --bg-primary: #050508;
  --bg-secondary: #0a0a0f;
  --bg-tertiary: #12121a;
  --bg-hover: #16161f;
  --bg-card: rgba(16, 16, 24, 0.8);

  /* 边框颜色 */
  --border-color: rgba(0, 212, 255, 0.1);
  --border-color-light: rgba(0, 212, 255, 0.05);
  --border-color-hover: rgba(0, 212, 255, 0.3);

  /* 文字颜色 */
  --text-primary: #e8e8e8;
  --text-secondary: #a0a0a0;
  --text-tertiary: #606060;

  /* 强调色 - 青色/绿色科技风 */
  --accent-primary: #00d4ff;
  --accent-hover: #00e5ff;
  --accent-secondary: #00ff88;
  --accent-gradient: linear-gradient(135deg, #00d4ff, #00ff88);

  /* 状态颜色 */
  --success: #00ff88;
  --warning: #ffaa00;
  --error: #ff4757;

  /* 发光效果 */
  --glow-primary: 0 0 20px rgba(0, 212, 255, 0.3);
  --glow-secondary: 0 0 20px rgba(0, 255, 136, 0.2);
  --glow-hover: 0 0 30px rgba(0, 212, 255, 0.4);
  --glow-card: 0 0 40px rgba(0, 212, 255, 0.1);

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  /* 动画 */
  --transition: all 0.3s ease;
  --transition-fast: all 0.15s ease;
  --transition-slow: all 0.5s ease;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family:
    "Inter",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "PingFang SC",
    "Microsoft YaHei",
    sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* 背景网格效果 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
  z-index: -1;
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--accent-hover);
  text-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  outline: none;
  transition: var(--transition);
}

input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
  color: var(--text-primary);
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  outline: none;
  transition: var(--transition);
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--accent-primary);
  box-shadow:
    0 0 0 3px rgba(0, 212, 255, 0.15),
    var(--glow-primary);
}

input::placeholder,
textarea::placeholder {
  color: var(--text-tertiary);
}

.hidden {
  display: none !important;
}

/* Scrollbar styling - 科技风滚动条 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(
    180deg,
    var(--accent-primary),
    var(--accent-secondary)
  );
  border-radius: 4px;
  opacity: 0.5;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
  box-shadow: var(--glow-primary);
}

/* Selection styling */
::selection {
  background-color: rgba(0, 212, 255, 0.3);
  color: var(--text-primary);
}

/* 动画关键帧 */
@keyframes pulse-glow {
  0%,
  100% {
    box-shadow: 0 0 5px rgba(0, 212, 255, 0.3);
  }
  50% {
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.6);
  }
}

@keyframes gradient-shift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes border-glow {
  0%,
  100% {
    border-color: rgba(0, 212, 255, 0.2);
  }
  50% {
    border-color: rgba(0, 212, 255, 0.5);
  }
}