/**
 * RSDataTool - Common Styles Module
 * 公共样式模块，供所有页面共享使用
 * 
 * @version 1.0.0
 */

/* ===== Design Tokens ===== */
:root {
  /* Colors - Light Theme */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-sidebar: #ffffff;
  --bg-code: #f1f5f9;
  --bg-hover: #e2e8f0;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #94a3b8;
  --text-link: #2563eb;
  
  --border-color: #e2e8f0;
  --border-light: #f1f5f9;
  
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-light: #dbeafe;
  --accent-bg: #eff6ff;
  
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
  --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.15);
  
  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  
  /* Transitions */
  --transition: 0.2s ease;
  --transition-slow: 0.3s ease;
  --transition-fast: 0.15s ease;
  
  /* Layout */
  --header-height: 64px;
  --max-width: 1200px;
}

/* Dark Theme Overrides */
[data-theme="dark"] {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-tertiary: #1f2937;
  --bg-card: rgba(31, 41, 55, 0.5);
  --bg-sidebar: rgba(15, 23, 42, 0.7);
  --bg-code: #1f2937;
  --bg-hover: #374151;
  
  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
  --text-tertiary: #6b7280;
  --text-link: #60a5fa;
  
  --border-color: rgba(75, 85, 99, 0.3);
  --border-light: rgba(75, 85, 99, 0.15);
  
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --accent-light: rgba(59, 130, 246, 0.15);
  --accent-bg: rgba(59, 130, 246, 0.08);
  
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4), 0 2px 4px -2px rgba(0,0,0,0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.4), 0 4px 6px -4px rgba(0,0,0,0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.4), 0 8px 10px -6px rgba(0,0,0,0.3);
  --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.15);
}

/* ===== Reset & Base ===== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

/* ===== Scrollbar Styling ===== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

/* ===== Text Selection ===== */
::selection {
  background: var(--accent);
  color: #fff;
}

::-moz-selection {
  background: var(--accent);
  color: #fff;
}

/* ===== Focus Styles (Accessibility) ===== */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ===== Common Animations ===== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* ===== Scroll Reveal ===== */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal-left.active {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal-right.active {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal-scale.active {
  opacity: 1;
  transform: scale(1);
}

/* ===== Cursor Glow ===== */
.cursor-glow {
  position: fixed;
  width: 250px;
  height: 250px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s ease;
  opacity: 0;
}

.cursor-glow.visible {
  opacity: 1;
}

/* ===== Back to Top ===== */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #06b6d4 100%);
  background-size: 200% 200%;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s ease;
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
  z-index: 90;
  border: none;
  animation: gradientShift 3s ease infinite;
}

.back-to-top::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6, #06b6d4);
  opacity: 0.3;
  filter: blur(8px);
  z-index: -1;
  transition: opacity 0.3s ease;
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(59, 130, 246, 0.5);
}

.back-to-top:hover::before {
  opacity: 0.5;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ===== Progress Bar ===== */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, #3b82f6, #8b5cf6, #06b6d4);
  z-index: 1000;
  box-shadow: 0 0 10px rgba(59, 130, 246, 0.5);
  transition: width 0.1s ease;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  border: none;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #06b6d4 100%);
  background-size: 200% 200%;
  color: #fff;
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(59, 130, 246, 0.5);
  background-position: 100% 50%;
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-tertiary);
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
}

/* ===== Cards ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 24px;
  transition: all var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

/* ===== Badges ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 999px;
  background: var(--accent-bg);
  color: var(--accent);
}

.badge-success {
  background: rgba(16, 185, 129, 0.1);
  color: #10b981;
}

.badge-warning {
  background: rgba(245, 158, 11, 0.1);
  color: #f59e0b;
}

.badge-danger {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-4 { gap: 16px; }
.gap-6 { gap: 24px; }

.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }

.p-2 { padding: 8px; }
.p-4 { padding: 16px; }
.p-6 { padding: 24px; }

.w-full { width: 100%; }
.hidden { display: none; }

/* ===== Accessibility ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Focus styles for keyboard navigation */
button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ===== Loading States ===== */
.skeleton {
  background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-tertiary) 50%, var(--bg-secondary) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ===== Error States ===== */
.error-container {
  padding: 48px 24px;
  text-align: center;
  color: var(--text-secondary);
}

.error-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.error-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.error-message {
  font-size: 0.95rem;
  margin-bottom: 24px;
}

.error-retry {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.error-retry:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}