/* Root Styling & Custom Theme Variables */
:root {
  --font-brand: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Premium Glowing Dark Theme Palette (Green Apple variant - Default Night Mode) */
  --bg-color: #030704; /* Deep crisp black-green */
  --panel-bg: rgba(10, 16, 12, 0.5); /* Frosted green-apple dark panel */
  --panel-border: rgba(255, 255, 255, 0.06);
  --panel-border-hover: rgba(255, 255, 255, 0.12);

  --text-primary: #f2f5f3;
  --text-secondary: #a3b8a8;
  --text-muted: #5f7566;

  --accent-primary: #4ade80; /* Vibrant crisp green-apple */
  --accent-secondary: #a3e635; /* Fresh lime-apple green */
  --accent-glow: rgba(74, 222, 128, 0.12);
  
  --success: #22c55e;
  --warning: #eab308;
  
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --glass-blur: blur(16px) saturate(180%);
  --brand-gradient: linear-gradient(to right, #ffffff, var(--accent-primary));
}

/* Day Mode (Light Green Apple Theme Palette) */
body.light-mode {
  --bg-color: #f3f7f4; /* Clean soft whitish-green background */
  --panel-bg: rgba(255, 255, 255, 0.7); /* Frosted light glass panel */
  --panel-border: rgba(0, 0, 0, 0.06);
  --panel-border-hover: rgba(0, 0, 0, 0.12);

  --text-primary: #111a13; /* Rich slate dark-green */
  --text-secondary: #425447; /* Slate green */
  --text-muted: #7d9183;

  --accent-primary: #15a34a; /* Deep crisp apple green */
  --accent-secondary: #84cc16; /* Fresh lime apple green */
  --accent-glow: rgba(21, 163, 74, 0.08);
  
  --success: #16a34a;
  --warning: #ca8a04;
  --brand-gradient: linear-gradient(to right, #111a13, var(--accent-primary));
}


/* Reset and Global Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-body);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  line-height: 1.5;
}

/* Background Glowing Accents */
.glow-accent {
  position: absolute;
  width: 40vw;
  height: 40vw;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.12;
  z-index: -1;
  pointer-events: none;
}

.glow-1 {
  top: -10vw;
  left: -5vw;
  background: var(--accent-primary);
}

.glow-2 {
  bottom: 10vw;
  right: -5vw;
  background: var(--accent-secondary);
}

.glow-3 {
  top: 30%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: #3b82f6;
  width: 30vw;
  height: 30vw;
}

/* Main Layout Container */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  gap: 2rem;
}

/* Header Styling */
.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--panel-border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand-logo {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px var(--accent-glow);
}

.logo-icon {
  width: 1.8rem;
  height: 1.8rem;
  color: #fff;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

.brand-text h1 {
  font-family: var(--font-brand);
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: 1px;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-text .subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 400;
}

/* Actions Section */
.actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.update-time {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Button Styling */
.btn {
  font-family: var(--font-brand);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
  border: 1px solid transparent;
}

.btn i {
  width: 1.1rem;
  height: 1.1rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  color: #fff;
  box-shadow: 0 4px 12px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px var(--accent-glow);
  filter: brightness(1.1);
}

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

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--panel-border-hover);
  transform: translateY(-2px);
}

/* Navigation & Tabs */
.dashboard-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.tabs {
  background: rgba(255, 255, 255, 0.03);
  padding: 0.3rem;
  border-radius: 12px;
  border: 1px solid var(--panel-border);
  display: flex;
  gap: 0.2rem;
}

.tab-btn {
  font-family: var(--font-brand);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: transparent;
  border: none;
  padding: 0.6rem 1.2rem;
  border-radius: 9px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.tab-btn i {
  width: 1.2rem;
  height: 1.2rem;
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.count-badge {
  background: var(--accent-primary);
  color: #fff;
  font-size: 0.75rem;
  padding: 0.1rem 0.5rem;
  border-radius: 20px;
  font-weight: 700;
}

/* Controls Panel */
.controls-panel {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.search-box {
  position: relative;
  width: 280px;
}

.search-icon {
  position: absolute;
  left: 0.8rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1.1rem;
  height: 1.1rem;
  color: var(--text-muted);
  pointer-events: none;
}

.search-box input {
  width: 100%;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 0.6rem 0.8rem 0.6rem 2.4rem;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition-smooth);
  backdrop-filter: var(--glass-blur);
}

.search-box input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 12px var(--accent-glow);
}

.filter-dropdown select {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 0.6rem 2rem 0.6rem 1rem;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  outline: none;
  cursor: pointer;
  transition: var(--transition-smooth);
  appearance: none;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3E%3Cpath stroke='%239ca3af' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3E%3C/svg%3E");
  background-position: right 0.5rem center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  backdrop-filter: var(--glass-blur);
  min-width: 150px;
}

.filter-dropdown select:focus {
  border-color: var(--accent-primary);
}

.hidden {
  display: none !important;
}

/* Content Layout (Grids) */
.content-section {
  display: none;
}

.content-section.active {
  display: block;
  animation: fadeIn 0.4s ease-in-out;
}

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

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 1.5rem;
}

/* Loader Styles */
.loader-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 6rem 2rem;
  text-align: center;
  color: var(--text-secondary);
}

.spinner {
  width: 3rem;
  height: 3rem;
  border: 3px solid rgba(255, 255, 255, 0.05);
  border-radius: 50%;
  border-top-color: var(--accent-primary);
  animation: spin 1s linear infinite;
}

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

/* Card Styling - News & Repos */
.card {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  backdrop-filter: var(--glass-blur);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--panel-border-hover);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-primary), var(--accent-secondary), transparent);
  transform: scaleX(0);
  transition: var(--transition-smooth);
}

.card:hover::before {
  transform: scaleX(1);
}

/* News Card Components */
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.badge {
  font-family: var(--font-brand);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--panel-border);
  color: var(--text-secondary);
}

.badge-source-techcrunch {
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.25);
  color: #34d399;
}

.badge-source-venturebeat {
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.25);
  color: #fbbf24;
}

.badge-source-marktechpost {
  background: rgba(139, 92, 246, 0.1);
  border-color: rgba(139, 92, 246, 0.25);
  color: #c084fc;
}

.badge-source-openai {
  background: rgba(59, 130, 246, 0.1);
  border-color: rgba(59, 130, 246, 0.25);
  color: #60a5fa;
}

.badge-source-deepmind {
  background: rgba(99, 102, 241, 0.1);
  border-color: rgba(99, 102, 241, 0.25);
  color: #818cf8;
}

.badge-source-huggingface {
  background: rgba(234, 179, 8, 0.1);
  border-color: rgba(234, 179, 8, 0.25);
  color: #facc15;
}

.badge-source-arxivcsai {
  background: rgba(168, 85, 247, 0.1);
  border-color: rgba(168, 85, 247, 0.25);
  color: #c084fc;
}

.badge-source-theverge {
  background: rgba(236, 72, 153, 0.1);
  border-color: rgba(236, 72, 153, 0.25);
  color: #f472b6;
}

.badge-source-mittechreview {
  background: rgba(20, 184, 166, 0.1);
  border-color: rgba(20, 184, 166, 0.25);
  color: #2dd4bf;
}

.pub-date {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.card-title {
  font-family: var(--font-brand);
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition-smooth);
}

.card-title:hover {
  color: #fff;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
}

.card-description {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 0.8rem;
}

.author {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.85rem;
  color: var(--accent-primary);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition-smooth);
}

.read-more:hover {
  color: var(--accent-secondary);
}

.read-more i {
  width: 0.9rem;
  height: 0.9rem;
}

/* Repo Card Components */
.repo-header {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.repo-owner {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.repo-name {
  font-family: var(--font-brand);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition-smooth);
}

.repo-name:hover {
  color: var(--accent-primary);
}

.repo-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.2rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.repo-lang {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.lang-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.repo-stat {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.repo-stat i {
  width: 1rem;
  height: 1rem;
  color: var(--text-muted);
}

.trending-today {
  color: var(--success);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

/* Toast System */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: rgba(13, 14, 21, 0.9);
  border: 1px solid var(--success);
  border-radius: 10px;
  padding: 0.8rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--text-primary);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  backdrop-filter: var(--glass-blur);
  transform: translateY(100px);
  opacity: 0;
  transition: var(--transition-smooth);
  z-index: 1000;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast-icon {
  color: var(--success);
  width: 1.3rem;
  height: 1.3rem;
}

/* Footer */
.dashboard-footer {
  text-align: center;
  padding-top: 2rem;
  margin-top: auto;
  border-top: 1px solid var(--panel-border);
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Responsive adjustments */
@media(max-width: 768px) {
  .dashboard-header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .actions {
    width: 100%;
    justify-content: space-between;
  }
  
  .dashboard-nav {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .controls-panel {
    width: 100%;
  }
  
  .search-box {
    width: 100%;
  }

  .grid {
    grid-template-columns: 1fr;
  }
}

/* Category Filtering Pills */
.category-pills {
  display: flex;
  gap: 0.8rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  align-items: center;
}

.pill {
  font-family: var(--font-brand);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--panel-border);
  color: var(--text-secondary);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.pill:hover {
  border-color: var(--panel-border-hover);
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.pill.active {
  background: var(--accent-glow);
  border-color: var(--accent-primary);
  color: var(--text-primary);
  box-shadow: 0 0 15px var(--accent-glow);
}

.pill-badge {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  font-size: 0.72rem;
  padding: 0.05rem 0.4rem;
  border-radius: 10px;
  font-weight: 700;
  transition: var(--transition-smooth);
}

.pill.active .pill-badge {
  background: var(--accent-primary);
  color: #fff;
}

/* Dot Category Indicators */
.dot-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 8px currentColor;
}

.dot-official {
  background-color: #3b82f6;
  color: rgba(59, 130, 246, 0.6);
}

.dot-media {
  background-color: #10b981;
  color: rgba(16, 185, 129, 0.6);
}

.dot-research {
  background-color: #a855f7;
  color: rgba(168, 85, 247, 0.6);
}

/* Light Mode Specific UI Adjustments */
body.light-mode .glow-accent {
  opacity: 0.05;
}

body.light-mode .tab-btn.active {
  background: rgba(0, 0, 0, 0.04);
  box-shadow: inset 0 1px 0 rgba(0, 0, 0, 0.05);
}

body.light-mode .card:hover {
  box-shadow: 0 12px 30px rgba(21, 163, 74, 0.06), inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

body.light-mode .toast {
  background: rgba(255, 255, 255, 0.95);
  border-color: var(--accent-primary);
  color: var(--text-primary);
  box-shadow: 0 10px 25px rgba(21, 163, 74, 0.08);
}

body.light-mode .toast-icon {
  color: var(--accent-primary);
}

body.light-mode select option {
  background-color: #f3f7f4;
  color: #111a13;
}