/**
 * Modern Design System - ag.bahc131.com
 * 现代化设计系统 - 采用CSS变量、Flex/Grid布局、流畅动画
 * Version: 2.0.0
 * Last Updated: 2026-07-11
 */

/* ============================================
   CSS Variables - Design Tokens
   ============================================ */
:root {
  /* Primary Colors */
  --color-primary: #6366f1;
  --color-primary-dark: #4f46e5;
  --color-primary-light: #818cf8;
  --color-primary-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  
  /* Secondary Colors */
  --color-secondary: #10b981;
  --color-secondary-dark: #059669;
  --color-secondary-gradient: linear-gradient(135deg, #10b981 0%, #34d399 100%);
  
  /* Accent Colors */
  --color-accent: #f43f5e;
  --color-accent-gradient: linear-gradient(135deg, #f43f5e 0%, #fb7185 100%);
  
  /* Neutral Colors */
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-hover: #f1f5f9;
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;
  
  /* Text Colors */
  --color-text-primary: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-muted: #94a3b8;
  --color-text-inverse: #ffffff;
  
  /* Status Colors */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;
  
  /* Typography */
  --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-family-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
  
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* 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), 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(99, 102, 241, 0.3);
  
  /* 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);
  
  /* Layout */
  --container-max-width: 1200px;
  --container-padding: var(--space-4);
  
  /* Z-index Scale */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 300;
  --z-tooltip: 400;
}

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

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

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  min-height: 100vh;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

input, textarea {
  font-family: inherit;
  font-size: inherit;
}

ul, ol {
  list-style: none;
}

/* ============================================
   Utility Classes
   ============================================ */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }

/* ============================================
   Login Page Styles
   ============================================ */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  position: relative;
  overflow: hidden;
}

.login-page::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
  background-size: 50px 50px;
  animation: backgroundMove 20s linear infinite;
  opacity: 0.5;
}

@keyframes backgroundMove {
  0% { transform: translate(0, 0); }
  100% { transform: translate(50px, 50px); }
}

.login-container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 420px;
  padding: var(--space-8);
}

.login-card {
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  padding: var(--space-10) var(--space-8);
  box-shadow: var(--shadow-xl);
  animation: slideUp 0.6s var(--transition-bounce);
}

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

.login-header {
  text-align: center;
  margin-bottom: var(--space-8);
}

.login-logo {
  width: 240px;
  height: 60px;
  margin: 0 auto var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-logo svg {
  width: 100%;
  height: 100%;
  display: block;
}

.login-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.login-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
}

.form-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  background: var(--color-surface);
  transition: all var(--transition-fast);
}

.form-input:hover {
  border-color: var(--color-primary-light);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-input::placeholder {
  color: var(--color-text-muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--color-primary-gradient);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

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

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
}

.btn-block {
  width: 100%;
}

/* ============================================
   Dashboard Page Styles
   ============================================ */
.dashboard-page {
  min-height: 100vh;
  background: var(--color-bg);
}

/* Header */
.dashboard-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  backdrop-filter: blur(10px);
  background-color: rgba(255, 255, 255, 0.9);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header-icon {
  width: 40px;
  height: 40px;
  background: var(--color-primary-gradient);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.header-title-group {
  display: flex;
  flex-direction: column;
}

.header-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  line-height: var(--line-height-tight);
}

.header-subtitle {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}

.header-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--color-border-light);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  background: var(--color-success);
  border-radius: var(--radius-full);
  animation: pulse 2s infinite;
}

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

/* Main Content */
.dashboard-main {
  padding: var(--space-8) 0;
}

.welcome-section {
  text-align: center;
  margin-bottom: var(--space-10);
  animation: fadeIn 0.6s ease-out;
}

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

.welcome-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.welcome-title .highlight {
  background: var(--color-primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.welcome-desc {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Section Cards */
.section-grid {
  display: grid;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

@media (min-width: 768px) {
  .section-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.section-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: all var(--transition-base);
  animation: slideUp 0.5s ease-out backwards;
}

.section-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.section-card:nth-child(1) { animation-delay: 0.1s; }
.section-card:nth-child(2) { animation-delay: 0.2s; }

.section-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border-light);
}

.section-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
}

.section-card.member .section-icon {
  background: var(--color-secondary-gradient);
  color: white;
}

.section-card.agent .section-icon {
  background: var(--color-accent-gradient);
  color: white;
}

.section-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

.section-badge {
  margin-left: auto;
  padding: var(--space-1) var(--space-3);
  background: var(--color-border-light);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
}

/* Link Grid */
.link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--space-3);
  padding: var(--space-5) var(--space-6);
}

.link-item {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
  background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all var(--transition-fast);
  overflow: hidden;
  min-height: 90px;
  box-shadow: var(--shadow-sm);
}

.link-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-primary-gradient);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.link-item:hover::before {
  transform: scaleX(1);
}

.link-item:hover {
  border-color: var(--color-primary);
  background: linear-gradient(135deg, #ffffff 0%, #eef2ff 100%);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.link-item:hover .link-number {
  color: var(--color-primary);
  transform: scale(1.05);
  transition: all var(--transition-fast);
}

.link-number {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  letter-spacing: 0.05em;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Footer */
.dashboard-footer {
  padding: var(--space-6) 0;
  text-align: center;
  border-top: 1px solid var(--color-border);
}

.footer-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 640px) {
  :root {
    --container-padding: var(--space-4);
  }
  
  .login-card {
    padding: var(--space-6);
  }
  
  .login-title {
    font-size: var(--font-size-xl);
  }
  
  .welcome-title {
    font-size: var(--font-size-2xl);
  }
  
  .link-grid {
    grid-template-columns: 1fr;
    gap: var(--space-3);
    padding: var(--space-4);
  }
  
  /* 會員入口線路樣式 - 藍紫色 */
  .section-card.member .link-item {
    min-height: 70px;
    padding: var(--space-4);
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    border: none;
    box-shadow: 0 4px 6px -1px rgba(79, 70, 229, 0.3), 0 2px 4px -2px rgba(79, 70, 229, 0.2);
  }
  
  .section-card.member .link-item::before {
    display: none;
  }
  
  .section-card.member .link-number {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: #ffffff;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    letter-spacing: 0.1em;
  }
  
  .section-card.member .link-item:hover {
    background: linear-gradient(135deg, #4338ca 0%, #6d28d9 100%);
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(79, 70, 229, 0.4), 0 4px 6px -4px rgba(79, 70, 229, 0.3);
  }
  
  .section-card.member .link-item:hover .link-number {
    color: #ffffff;
    transform: scale(1.02);
  }
  
  /* 代理入口線路樣式 - 綠色系 */
  .section-card.agent .link-item {
    min-height: 70px;
    padding: var(--space-4);
    background: linear-gradient(135deg, #059669 0%, #10b981 100%);
    border: none;
    box-shadow: 0 4px 6px -1px rgba(5, 150, 105, 0.3), 0 2px 4px -2px rgba(5, 150, 105, 0.2);
  }
  
  .section-card.agent .link-item::before {
    display: none;
  }
  
  .section-card.agent .link-number {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: #ffffff;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    letter-spacing: 0.1em;
  }
  
  .section-card.agent .link-item:hover {
    background: linear-gradient(135deg, #047857 0%, #059669 100%);
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(5, 150, 105, 0.4), 0 4px 6px -4px rgba(5, 150, 105, 0.3);
  }
  
  .section-card.agent .link-item:hover .link-number {
    color: #ffffff;
    transform: scale(1.02);
  }
  
  .section-header {
    padding: var(--space-4);
  }
  
  .header-content {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
  }
}

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

/* Focus Visible */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  .link-item {
    border-width: 2px;
  }
  
  .form-input {
    border-width: 2px;
  }
}

/* Print Styles */
@media print {
  .dashboard-header,
  .speed-test-section {
    display: none;
  }
  
  .section-card {
    break-inside: avoid;
  }
}