/* Design Tokens */
:root {
  --bg-primary: #05050a;
  --bg-panel: rgba(10, 10, 20, 0.7);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  --accent-primary: #3b82f6; /* Blue */
  --accent-secondary: #06b6d4; /* Cyan */
  --accent-gradient: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  --accent-glow: rgba(59, 130, 246, 0.15);
  
  --font-title: 'Outfit', -apple-system, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s ease-out;
}

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

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

/* Background glows */
.bg-glow {
  position: fixed;
  width: 550px;
  height: 550px;
  border-radius: 50%;
  filter: blur(140px);
  opacity: 0.12;
  z-index: -1;
  pointer-events: none;
}

.bg-glow-1 {
  background: var(--accent-primary);
  top: -10%;
  left: -10%;
  animation: floatGlow 22s infinite alternate ease-in-out;
}

.bg-glow-2 {
  background: var(--accent-secondary);
  bottom: -10%;
  right: -10%;
  animation: floatGlow 18s infinite alternate-reverse ease-in-out;
}

@keyframes floatGlow {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(110px, 80px) scale(1.2); }
}

/* App Container */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding: 3rem 4rem;
  max-width: 1400px;
  margin: 0 auto;
  gap: 2.5rem;
}

/* Hero Section */
.hero-section {
  text-align: center;
  margin-bottom: 1.5rem;
}

.brand-badge {
  display: inline-block;
  font-family: var(--font-title);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  background: rgba(6, 182, 212, 0.1);
  color: var(--accent-secondary);
  border: 1px solid rgba(6, 182, 212, 0.25);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  margin-bottom: 1rem;
}

.hero-title {
  font-family: var(--font-title);
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(to right, #ffffff, #06b6d4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 680px;
  margin: 0.75rem auto 0 auto;
  line-height: 1.6;
}

/* Star Incentive Banner */
.star-incentive-banner {
  background: rgba(16, 185, 129, 0.05);
  border: 1px solid rgba(16, 185, 129, 0.15);
  border-radius: 16px;
  padding: 1.2rem 1.75rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  max-width: 800px;
  margin: 1.5rem auto 0 auto;
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.1);
  text-align: left;
}

.star-icon {
  font-size: 2.2rem;
  animation: pulseStar 2s infinite ease-in-out;
}

@keyframes pulseStar {
  0% { transform: scale(1); filter: drop-shadow(0 0 0 rgba(234,179,8,0)); }
  50% { transform: scale(1.15); filter: drop-shadow(0 0 12px rgba(234,179,8,0.4)); }
  100% { transform: scale(1); filter: drop-shadow(0 0 0 rgba(234,179,8,0)); }
}

.banner-text {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.banner-text strong {
  font-family: var(--font-title);
  font-size: 0.95rem;
  color: #10b981;
}

.banner-text span {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Toolbar Filters */
.toolbar-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: center;
}

.search-wrapper {
  display: flex;
  align-items: center;
  background: rgba(10, 10, 20, 0.6);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 0.75rem 1.2rem;
  width: 100%;
  max-width: 600px;
  gap: 0.5rem;
  backdrop-filter: blur(12px);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.2);
}

.search-wrapper input {
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  color: #fff;
  font-family: var(--font-body);
  font-size: 0.95rem;
}

.search-icon {
  color: var(--text-muted);
}

.filter-categories {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.filter-btn {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.45rem 1rem;
  color: var(--text-secondary);
  font-family: var(--font-title);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition-fast);
}

.filter-btn:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
}

.filter-btn.active {
  background: var(--accent-gradient);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.25);
}

/* Projects Grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

/* Project Card */
.project-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(16px);
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.25s, box-shadow 0.25s;
  position: relative;
}

.project-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-secondary);
  box-shadow: 0 8px 32px rgba(6, 182, 212, 0.15), 0 4px 24px rgba(0, 0, 0, 0.35);
}

.card-top-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.project-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
}

.category-tag {
  font-family: var(--font-title);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  padding: 0.15rem 0.5rem;
  border-radius: 20px;
  color: var(--text-secondary);
}

.project-card h3 {
  font-family: var(--font-title);
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
}

.project-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  flex-grow: 1;
}

/* Card Actions */
.card-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.55rem 1rem;
  border-radius: 8px;
  font-family: var(--font-title);
  font-weight: 600;
  font-size: 0.8rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: var(--transition-smooth);
}

.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.2);
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-hover);
}

/* Unified Star Repos card action button */
.btn-star-repo {
  grid-column: span 2;
  background: rgba(234, 179, 8, 0.06);
  border: 1px solid rgba(234, 179, 8, 0.2);
  color: #eab308;
  transition: var(--transition-smooth);
}

.btn-star-repo:hover {
  background: rgba(234, 179, 8, 0.15);
  border-color: rgba(234, 179, 8, 0.45);
  transform: scale(1.02);
}

/* Footer */
.app-footer {
  text-align: center;
  padding: 2rem 0 1rem 0;
  border-top: 1px solid var(--border-color);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: auto;
}

/* Responsive */
@media (max-width: 768px) {
  .app-container {
    padding: 1.5rem 1.5rem;
  }
  .hero-title {
    font-size: 2.5rem;
  }
}