/**
 * TheFeed - Styles
 * Modern, clean design for AI & Security intelligence aggregator
 */

/* ========== CSS Variables ========== */
:root {
  /* Colors */
  --color-bg: #0f172a;
  --color-bg-card: #1e293b;
  --color-bg-hover: #334155;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-border: #334155;
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-accent: #8b5cf6;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;

  /* Severity colors */
  --color-critical: #dc2626;
  --color-high: #ea580c;
  --color-medium: #ca8a04;
  --color-low: #16a34a;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a:hover {
  color: var(--color-primary-hover);
}

/* ========== Container ========== */
.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* ========== Header ========== */
.header {
  background-color: var(--color-bg-card);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  background-color: rgba(30, 41, 59, 0.9);
}

.logo {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo-icon {
  font-size: 2rem;
}

.tagline {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-md);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.last-update {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  border-radius: 0.5rem;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-base);
  font-family: inherit;
}

.btn-primary {
  background-color: var(--color-primary);
  color: white;
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

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

.btn-icon {
  font-size: 1rem;
  display: inline-block;
}

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

/* ========== Main Content ========== */
.main {
  flex: 1;
  padding: var(--spacing-xl) 0;
}

/* ========== Unified Panel (Single Column Layout) ========== */
.unified-panel {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  padding: var(--spacing-lg);
  min-height: 85vh;
}

/* ========== Filters ========== */
.filters {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin: 0 var(--spacing-md);
}

.filter-checkbox {
  display: flex;
  align-items: center;
  cursor: pointer;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--color-border);
  border-radius: 0.5rem;
  transition: all 0.2s;
  user-select: none;
  background-color: transparent;
}

.filter-checkbox:hover {
  border-color: var(--color-primary);
  background-color: rgba(59, 130, 246, 0.1);
}

.filter-checkbox input[type="checkbox"] {
  margin: 0;
  margin-right: var(--spacing-sm);
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--color-primary);
}

.filter-checkbox input[type="checkbox"]:checked ~ .filter-label {
  color: var(--color-primary);
  font-weight: 600;
}

.filter-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.9rem;
  color: var(--color-text);
  white-space: nowrap;
}

.filter-icon {
  font-size: 1.2rem;
}

.filter-count {
  background-color: var(--color-primary);
  color: white;
  padding: 0.15rem 0.5rem;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 700;
  min-width: 1.5rem;
  text-align: center;
}

.filter-action {
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: transparent;
  border: 1px solid var(--color-border);
  border-radius: 0.4rem;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  transition: all 0.2s;
  font-family: inherit;
}

.filter-action:hover {
  background-color: rgba(59, 130, 246, 0.1);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

/* ========== Card Type Indicators ========== */
.card[data-type="paper"] {
  border-left: 4px solid #667eea; /* 蓝紫色 - 论文 */
}

.card[data-type="vulnerability"] {
  border-left: 4px solid #f5576c; /* 红色 - 漏洞 */
}

.card[data-type="cisakev"] {
  border-left: 4px solid #f59e0b; /* 橙色 - CISA已利用漏洞 */
}

.card[data-type="fred"] {
  border-left: 4px solid #10b981; /* 绿色 - 经济数据 */
}

.card[data-type="spacex"] {
  border-left: 4px solid #3b82f6; /* 深蓝色 - 航天发射 */
}

.card.hidden {
  display: none;
}

/* ========== Content List ========== */
.content-list {
  padding: var(--spacing-md);
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

/* 自定义滚动条 */
.content-list::-webkit-scrollbar {
  width: 8px;
}

.content-list::-webkit-scrollbar-track {
  background: var(--color-bg);
}

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

.content-list::-webkit-scrollbar-thumb:hover {
  background: var(--color-bg-hover);
}

/* ========== Cards ========== */
.card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  padding: var(--spacing-md);
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
  color: var(--color-text);
}

.card-title a {
  color: inherit;
}

.card-title a:hover {
  color: var(--color-primary);
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}

.card-meta-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.card-summary {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-sm);
}

.tag {
  background-color: var(--color-bg-hover);
  color: var(--color-text-muted);
  padding: 0.15rem var(--spacing-sm);
  border-radius: 0.25rem;
  font-size: 0.75rem;
  font-family: var(--font-mono);
}

/* CVE 特定样式 */
.severity-badge {
  padding: 0.25rem var(--spacing-sm);
  border-radius: 0.25rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.severity-critical {
  background-color: var(--color-critical);
  color: white;
}

.severity-high {
  background-color: var(--color-high);
  color: white;
}

.severity-medium {
  background-color: var(--color-medium);
  color: white;
}

.severity-low {
  background-color: var(--color-low);
  color: white;
}

/* ========== Loading & Error States ========== */
.loading,
.error {
  padding: var(--spacing-2xl);
  text-align: center;
  color: var(--color-text-muted);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--spacing-md);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.error {
  color: var(--color-danger);
}

/* ========== Footer ========== */
.footer {
  background-color: var(--color-bg-card);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: auto;
}

.footer p {
  margin-bottom: var(--spacing-xs);
}

.footer-note {
  font-size: 0.75rem;
  opacity: 0.7;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .unified-panel {
    min-height: 70vh;
  }

  .filters {
    flex-wrap: wrap;
    gap: var(--spacing-sm);
  }
}

@media (max-width: 768px) {
  html {
    font-size: 14px;
  }

  .container {
    padding: 0 var(--spacing-md);
  }

  .header {
    padding: var(--spacing-md) 0;
  }

  .logo {
    font-size: 1.5rem;
  }

  .unified-panel {
    min-height: 60vh;
    padding: var(--spacing-md);
  }

  .header-actions {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }

  .filters {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    margin: 0;
  }

  .filter-checkbox {
    padding: 0.6rem;
    justify-content: space-between;
  }

  .filter-label {
    flex: 1;
  }

  .filter-action {
    width: 100%;
    justify-content: center;
  }
}

/* ========== Animations ========== */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card {
  animation: fadeIn 0.3s ease-out;
}

/* ========== Translation Status Badges ========== */
.translation-badge {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
  margin-left: 0.5rem;
  vertical-align: middle;
}

.translation-pending {
  background-color: rgba(96, 165, 250, 0.1);
  color: #60a5fa;
  border: 1px solid rgba(96, 165, 250, 0.3);
}

.translation-retry {
  background-color: rgba(251, 191, 36, 0.1);
  color: #fbbf24;
  border: 1px solid rgba(251, 191, 36, 0.3);
}

.translation-failed {
  background-color: rgba(248, 113, 113, 0.1);
  color: #f87171;
  border: 1px solid rgba(248, 113, 113, 0.3);
}