/* Modern, Premium Design System for Pennyworth Apps */

:root {
  --bg-main: #030712; /* Slate 950 */
  --bg-surface: #0b0f19; /* Slate 900 tint */
  --bg-surface-hover: #111827;
  
  --primary: #f59e0b; /* Amber 500 */
  --primary-glow: rgba(245, 158, 11, 0.08);
  
  /* Category Colors */
  --color-finance: #eab308;      /* Gold */
  --color-directories: #06b6d4;  /* Cyan */
  --color-utilities: #ec4899;    /* Pink */
  --color-interactive: #10b981;  /* Emerald */
  
  --color-finance-glow: rgba(234, 179, 8, 0.1);
  --color-directories-glow: rgba(6, 182, 212, 0.1);
  --color-utilities-glow: rgba(236, 72, 153, 0.1);
  --color-interactive-glow: rgba(16, 185, 129, 0.1);

  --text-main: #f9fafb; /* Gray 50 */
  --text-muted: #9ca3af; /* Gray 400 */
  --text-dark: #4b5563; /* Gray 600 */
  
  --border-color: rgba(255, 255, 255, 0.04);
  
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  --transition-smooth: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  --border-radius-card: 18px;
}

/* Light Theme Overrides */
body.light-theme {
  --bg-main: #f8fafc; /* Slate 50 */
  --bg-surface: #ffffff;
  --bg-surface-hover: #f1f5f9; /* Slate 100 */
  
  --primary: #d97706; /* Amber 600 for contrast */
  --primary-glow: rgba(217, 119, 6, 0.05);
  
  /* Category Colors for Light Mode */
  --color-finance: #b45309;      /* Darker Gold */
  --color-directories: #0891b2;  /* Darker Cyan */
  --color-utilities: #db2777;    /* Darker Pink */
  --color-interactive: #059669;  /* Darker Emerald */
  
  --color-finance-glow: rgba(180, 83, 9, 0.04);
  --color-directories-glow: rgba(8, 145, 178, 0.04);
  --color-utilities-glow: rgba(219, 39, 119, 0.04);
  --color-interactive-glow: rgba(5, 150, 105, 0.04);

  --text-main: #0f172a; /* Slate 900 */
  --text-muted: #475569; /* Slate 600 */
  --text-dark: #94a3b8; /* Slate 400 */
  
  --border-color: rgba(0, 0, 0, 0.06);
}

/* Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.4s ease, color 0.4s ease;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Background Glowing Elements */
.glow-sphere {
  position: absolute;
  border-radius: 50%;
  filter: blur(140px);
  z-index: -1;
  pointer-events: none;
  opacity: 0.15;
  transition: opacity 0.4s ease;
}

body.light-theme .glow-sphere {
  opacity: 0.06;
}

.glow-sphere-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, #312e81 0%, transparent 70%); /* Deep Indigo */
  top: -10%;
  right: -5%;
}

.glow-sphere-2 {
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, #581c87 0%, transparent 70%); /* Deep Purple */
  bottom: 5%;
  left: -10%;
}

/* Header */
.header {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(3, 7, 18, 0.75);
  transition: background-color 0.4s ease, border-color 0.4s ease;
}

body.light-theme .header {
  background-color: rgba(248, 250, 252, 0.75);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-svg {
  display: block;
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Theme Toggle Button Styling */
.theme-toggle-btn {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
}

.theme-toggle-btn:hover {
  color: var(--text-main);
  border-color: rgba(255, 255, 255, 0.15);
  background-color: rgba(255, 255, 255, 0.03);
}

body.light-theme .theme-toggle-btn:hover {
  border-color: rgba(0, 0, 0, 0.15);
  background-color: rgba(0, 0, 0, 0.03);
}

/* Icon visibility */
.sun-icon {
  display: none;
}
.moon-icon {
  display: block;
}

body.light-theme .sun-icon {
  display: block;
  color: var(--primary);
}
body.light-theme .moon-icon {
  display: none;
}

/* Hero Section */
.hero-section {
  padding: 6rem 0 4rem 0;
  text-align: center;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 3.75rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.035em;
  margin-bottom: 1.5rem;
  color: var(--text-main);
}

.highlight-text {
  background: linear-gradient(135deg, #f59e0b 0%, #b45309 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.125rem;
  font-weight: 400;
  max-width: 620px;
  margin: 0 auto;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Filter Controls */
.filter-wrapper {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 4rem;
  align-items: center;
}

@media (min-width: 768px) {
  .filter-wrapper {
    flex-direction: row;
    justify-content: space-between;
  }
}

.filter-buttons {
  display: flex;
  gap: 0.5rem;
  background-color: rgba(255, 255, 255, 0.02);
  padding: 0.35rem;
  border-radius: 9999px;
  border: 1px solid var(--border-color);
  overflow-x: auto;
  max-width: 100%;
  scrollbar-width: none;
}

body.light-theme .filter-buttons {
  background-color: rgba(0, 0, 0, 0.015);
}

.filter-buttons::-webkit-scrollbar {
  display: none;
}

.filter-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.55rem 1.15rem;
  border-radius: 9999px;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition-smooth);
}

.filter-btn:hover {
  color: var(--text-main);
  background-color: rgba(255, 255, 255, 0.03);
}

body.light-theme .filter-btn:hover {
  background-color: rgba(0, 0, 0, 0.02);
}

.filter-btn.active {
  background: #ffffff;
  color: #030712;
  box-shadow: 0 4px 12px rgba(255, 255, 255, 0.1);
}

body.light-theme .filter-btn.active {
  background: #0f172a;
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.15);
}

.search-box {
  width: 100%;
  max-width: 320px;
}

.search-box input {
  width: 100%;
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  padding: 0.75rem 1.5rem;
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 0.85rem;
  transition: var(--transition-smooth);
}

body.light-theme .search-box input {
  background-color: #ffffff;
}

.search-box input:focus {
  outline: none;
  border-color: rgba(255, 255, 255, 0.2);
  background-color: rgba(255, 255, 255, 0.04);
  box-shadow: 0 0 16px rgba(255, 255, 255, 0.05);
}

body.light-theme .search-box input:focus {
  border-color: rgba(0, 0, 0, 0.15);
  background-color: #ffffff;
  box-shadow: 0 0 16px rgba(0, 0, 0, 0.02);
}

/* Portfolio Grid */
.project-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 6rem;
}

@media (min-width: 640px) {
  .project-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .project-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Cards styling */
.project-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-card);
  padding: 2.25rem 2rem;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: var(--transition-smooth);
}

.project-card.hidden {
  display: none !important;
}

.project-card:hover {
  transform: translateY(-4px);
  background-color: var(--bg-surface-hover);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
}

body.light-theme .project-card:hover {
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.06);
}

.card-glow {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  opacity: 0;
  transition: var(--transition-smooth);
  pointer-events: none;
}

.project-card:hover .card-glow {
  opacity: 1;
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  transition: var(--transition-smooth);
}

body.light-theme .card-icon {
  background-color: rgba(0, 0, 0, 0.015);
}

.category-badge {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.6rem;
  display: inline-block;
  transition: var(--transition-smooth);
}

.card-title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
  color: var(--text-main);
}

.card-description {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 400;
  line-height: 1.6;
}

/* Category-specific styling mapping */

/* Finance */
.project-card[data-category="finance"] .category-badge {
  color: var(--color-finance);
}
.project-card[data-category="finance"] .card-icon {
  color: var(--color-finance);
}
.project-card[data-category="finance"]:hover {
  border-color: rgba(234, 179, 8, 0.2);
}
body.light-theme .project-card[data-category="finance"]:hover {
  border-color: rgba(180, 83, 9, 0.15);
}
.project-card[data-category="finance"] .card-glow {
  background: radial-gradient(circle at 100% 0%, var(--color-finance-glow) 0%, transparent 60%);
}
.project-card[data-category="finance"]:hover .card-icon {
  background-color: rgba(234, 179, 8, 0.08);
  border-color: rgba(234, 179, 8, 0.2);
}
body.light-theme .project-card[data-category="finance"]:hover .card-icon {
  background-color: rgba(180, 83, 9, 0.05);
  border-color: rgba(180, 83, 9, 0.15);
}

/* Directories */
.project-card[data-category="directories"] .category-badge {
  color: var(--color-directories);
}
.project-card[data-category="directories"] .card-icon {
  color: var(--color-directories);
}
.project-card[data-category="directories"]:hover {
  border-color: rgba(6, 182, 212, 0.2);
}
body.light-theme .project-card[data-category="directories"]:hover {
  border-color: rgba(8, 145, 178, 0.15);
}
.project-card[data-category="directories"] .card-glow {
  background: radial-gradient(circle at 100% 0%, var(--color-directories-glow) 0%, transparent 60%);
}
.project-card[data-category="directories"]:hover .card-icon {
  background-color: rgba(6, 182, 212, 0.08);
  border-color: rgba(6, 182, 212, 0.2);
}
body.light-theme .project-card[data-category="directories"]:hover .card-icon {
  background-color: rgba(8, 145, 178, 0.05);
  border-color: rgba(8, 145, 178, 0.15);
}

/* Utilities */
.project-card[data-category="utilities"] .category-badge {
  color: var(--color-utilities);
}
.project-card[data-category="utilities"] .card-icon {
  color: var(--color-utilities);
}
.project-card[data-category="utilities"]:hover {
  border-color: rgba(236, 72, 153, 0.2);
}
body.light-theme .project-card[data-category="utilities"]:hover {
  border-color: rgba(219, 39, 119, 0.15);
}
.project-card[data-category="utilities"] .card-glow {
  background: radial-gradient(circle at 100% 0%, var(--color-utilities-glow) 0%, transparent 60%);
}
.project-card[data-category="utilities"]:hover .card-icon {
  background-color: rgba(236, 72, 153, 0.08);
  border-color: rgba(236, 72, 153, 0.2);
}
body.light-theme .project-card[data-category="utilities"]:hover .card-icon {
  background-color: rgba(219, 39, 119, 0.05);
  border-color: rgba(219, 39, 119, 0.15);
}

/* Interactive */
.project-card[data-category="interactive"] .category-badge {
  color: var(--color-interactive);
}
.project-card[data-category="interactive"] .card-icon {
  color: var(--color-interactive);
}
.project-card[data-category="interactive"]:hover {
  border-color: rgba(16, 185, 129, 0.2);
}
body.light-theme .project-card[data-category="interactive"]:hover {
  border-color: rgba(5, 150, 105, 0.15);
}
.project-card[data-category="interactive"] .card-glow {
  background: radial-gradient(circle at 100% 0%, var(--color-interactive-glow) 0%, transparent 60%);
}
.project-card[data-category="interactive"]:hover .card-icon {
  background-color: rgba(16, 185, 129, 0.08);
  border-color: rgba(16, 185, 129, 0.2);
}
body.light-theme .project-card[data-category="interactive"]:hover .card-icon {
  background-color: rgba(5, 150, 105, 0.05);
  border-color: rgba(5, 150, 105, 0.15);
}

/* Footer */
.footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border-color);
  text-align: center;
  transition: border-color 0.4s ease;
}

.footer p {
  font-size: 0.85rem;
  color: var(--text-dark);
}

/* Micro-animations */
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.15; }
  50% { transform: scale(1.03); opacity: 0.18; }
}

body.light-theme .glow-sphere-1,
body.light-theme .glow-sphere-2 {
  animation: none;
  opacity: 0.03;
}

.glow-sphere-1 {
  animation: pulse 10s ease-in-out infinite;
}

.glow-sphere-2 {
  animation: pulse 15s ease-in-out infinite;
}

/* Clickable project links inside cards */
.project-card {
  cursor: pointer;
}

.project-url {
  margin-top: 1.5rem;
  font-size: 0.825rem;
  font-weight: 700;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  width: fit-content;
  transition: var(--transition-smooth);
}

.project-card:hover .project-url {
  transform: translateX(2px);
}


/* Color overrides for category links */
.project-card[data-category="finance"] .project-url {
  color: var(--color-finance);
}
.project-card[data-category="directories"] .project-url {
  color: var(--color-directories);
}
.project-card[data-category="utilities"] .project-url {
  color: var(--color-utilities);
}
.project-card[data-category="interactive"] .project-url {
  color: var(--color-interactive);
}