/*
 * ==========================================
 * 小雨微寒 · 高级UI设计系统 Base Styles
 * ==========================================
 * Premium Design System with Modern Aesthetics
 */

/* ========== CSS Variables ========== */
:root {
  /* Light Theme Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #fef3f8;
  --bg-tertiary: #fce7f3;
  --bg-elevated: #fbcfe8;
  
  /* Glass Morphism */
  --glass-bg: rgba(255, 255, 255, 0.8);
  --glass-border: rgba(244, 114, 182, 0.15);
  --glass-shadow: 0 8px 32px 0 rgba(244, 114, 182, 0.15);
  
  /* Text Colors */
  --text-primary: #1f2937;
  --text-secondary: #4b5563;
  --text-tertiary: #6b7280;
  --text-muted: #9ca3af;
  
  /* Brand Gradients */
  --gradient-primary: linear-gradient(135deg, #ffc4e1 0%, #a7d8ff 100%);
  --gradient-accent: linear-gradient(135deg, #ffc4e1 0%, #ffd4e7 100%);
  --gradient-success: linear-gradient(135deg, #a7f3d0 0%, #6ee7b7 100%);
  --gradient-warning: linear-gradient(135deg, #fde68a 0%, #fcd34d 100%);
  
  /* Accent Colors */
  --accent-blue: #93c5fd;
  --accent-purple: #c4b5fd;
  --accent-pink: #f9a8d4;
  --accent-green: #86efac;
  --accent-orange: #fdba74;
  --accent-red: #fca5a5;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 20px rgba(96, 165, 250, 0.4);
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
}

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

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

body {
  font-family: var(--font-sans);
  background: linear-gradient(135deg, #fef3f8 0%, #e0f2fe 100%);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

[v-cloak] {
  display: none;
}

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

::-webkit-scrollbar-track {
  background: #fce7f3;
}

::-webkit-scrollbar-thumb {
  background: #f9a8d4;
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: #f472b6;
}

/* ========== Background Effects ========== */
.bg-effects {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
  mix-blend-mode: screen;
}

.orb-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #ffc4e1 0%, transparent 70%);
  top: -250px;
  left: -250px;
  animation: float 20s ease-in-out infinite;
}

.orb-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, #a7d8ff 0%, transparent 70%);
  bottom: -200px;
  right: -200px;
  animation: float 15s ease-in-out infinite reverse;
}

.orb-3 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, #ffd4e7 0%, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: pulse 10s ease-in-out infinite;
}

.mesh-gradient {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(90deg, rgba(244, 114, 182, 0.05) 1px, transparent 1px),
    linear-gradient(rgba(244, 114, 182, 0.05) 1px, transparent 1px);
  background-size: 50px 50px;
}

/* ========== Layout ========== */
#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  position: relative;
}

/* ========== Header ========== */
.app-header {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  padding: var(--spacing-md) var(--spacing-lg);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.header-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-xl);
}

/* ========== Brand Section ========== */
.brand-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.logo-wrapper {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  position: relative;
}

.logo-glow {
  position: absolute;
  width: 60px;
  height: 60px;
  background: radial-gradient(circle, rgba(249, 168, 212, 0.4) 0%, transparent 70%);
  filter: blur(20px);
  animation: pulse 3s ease-in-out infinite;
}

.logo-icon {
  width: 40px;
  height: 40px;
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 4px 8px rgba(249, 168, 212, 0.3));
}

.cloud-path {
  animation: cloudFloat 6s ease-in-out infinite;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.brand-title {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, #f472b6, #93c5fd);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.tagline {
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-style: italic;
  padding-left: calc(40px + var(--spacing-md));
}

/* ========== Navigation ========== */
.main-nav {
  display: flex;
  gap: var(--spacing-sm);
  background: rgba(255, 255, 255, 0.6);
  padding: var(--spacing-xs);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--glass-border);
}

.nav-btn {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  overflow: hidden;
}

.nav-btn:hover {
  color: var(--text-primary);
  background: rgba(249, 168, 212, 0.1);
}

.nav-btn.active {
  color: var(--text-primary);
  background: var(--gradient-primary);
  box-shadow: 0 4px 12px rgba(249, 168, 212, 0.3);
}

.nav-icon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-base);
}

.nav-btn:hover .nav-icon {
  transform: scale(1.1);
}

.nav-indicator {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.nav-btn.active .nav-indicator {
  transform: scaleX(1);
}

/* ========== Main Content ========== */
.app-main {
  flex: 1;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  padding: var(--spacing-xl);
}

.view-section {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-xl);
  min-height: 600px;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.section-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* ========== Buttons ========== */
.primary-btn,
.secondary-btn,
.icon-btn,
.tool-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 0.9375rem;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.primary-btn {
  background: var(--gradient-primary);
  color: var(--text-primary);
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(249, 168, 212, 0.3);
}

.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(249, 168, 212, 0.4);
}

.primary-btn:active {
  transform: translateY(0);
}

.primary-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.secondary-btn {
  background: rgba(255, 255, 255, 0.8);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
}

.secondary-btn:hover {
  background: var(--bg-tertiary);
  border-color: var(--text-muted);
}

.icon-btn {
  width: 40px;
  height: 40px;
  padding: 0;
  background: rgba(255, 255, 255, 0.8);
  color: var(--text-secondary);
  border: 1px solid var(--glass-border);
}

.icon-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  transform: scale(1.05);
}

.tool-btn {
  background: transparent;
  color: var(--text-secondary);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.8125rem;
  gap: var(--spacing-xs);
  white-space: nowrap;
  flex-shrink: 0;
}

.tool-btn:hover {
  background: rgba(252, 231, 243, 0.6);
  color: var(--text-primary);
}

.tool-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.tool-btn.danger {
  color: var(--accent-red);
}

.tool-btn.danger:hover {
  background: rgba(252, 165, 165, 0.2);
}

.tool-btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.btn-icon {
  width: 18px;
  height: 18px;
}

/* ========== Action Group ========== */
.action-group {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

/* ========== Footer ========== */
.app-footer {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  border-top: 1px solid var(--glass-border);
  padding: var(--spacing-xl);
  text-align: center;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.social-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.8);
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: all var(--transition-base);
  border: 1px solid var(--glass-border);
}

.social-btn:hover {
  background: var(--gradient-primary);
  color: var(--text-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(249, 168, 212, 0.3);
}

.social-btn svg {
  width: 20px;
  height: 20px;
}

.copyright {
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

/* ========== Responsive Design ========== */
@media (max-width: 768px) {
  .app-header {
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .header-content {
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
  }
  
  .brand-section {
    width: 100%;
    text-align: center;
  }
  
  .brand-area {
    justify-content: center;
  }
  
  .logo-icon {
    width: 36px;
    height: 36px;
  }
  
  .brand-title {
    font-size: 1.25rem;
  }
  
  .tagline {
    text-align: center;
    padding-left: 0;
    font-size: 0.75rem;
  }
  
  .main-nav {
    width: 100%;
    justify-content: center;
  }
  
  .nav-btn {
    font-size: 0.875rem;
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .main-content {
    padding: var(--spacing-lg) var(--spacing-md);
  }
  
  .content-section {
    padding: var(--spacing-lg);
  }
  
  .app-footer {
    padding: var(--spacing-lg) var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .logo-icon {
    width: 32px;
    height: 32px;
  }
  
  .brand-title {
    font-size: 1.125rem;
  }
  
  .nav-btn {
    font-size: 0.8125rem;
    padding: var(--spacing-xs) var(--spacing-sm);
  }
  
  .nav-icon {
    width: 16px;
    height: 16px;
  }
  
  .main-content {
    padding: var(--spacing-md) var(--spacing-sm);
  }
  
  .content-section {
    padding: var(--spacing-md);
  }
  
  .section-header h2 {
    font-size: 1.25rem;
  }
}

.view-section {
  padding: var(--spacing-md);
}