@import url('https://fonts.googleapis.com/css2?family=Inter:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&family=Space+Grotesk:wght@400;500;600;700&family=JetBrains+Mono:ital,wght@0,400;0,600;1,400&display=swap');

:root {
  /* Modern 2026 Premium Palette (Light Mode) */
  --color-bg: #f8fafc;               /* Crisp ice slate */
  --color-surface: #ffffff;          /* Pure white card canvas */
  --color-surface-soft: #f1f5f9;     /* Soft slate highlight */
  --color-text: #0f172a;             /* Deep slate text */
  --color-text-muted: #64748b;       /* Cool slate muted */
  --color-accent: #6366f1;           /* Vivid Indigo */
  --color-accent-hover: #4f46e5;
  --color-accent-light: #e0e7ff;
  --color-accent-2: #8b5cf6;         /* Electric Purple */
  --color-accent-2-hover: #7c3aed;
  --color-accent-emerald: #10b981;   /* Emerald Green */
  --color-accent-cyan: #06b6d4;      /* Neon Cyan */
  --color-border: #e2e8f0;           /* Subtle slate border */
  --color-shadow: rgba(15, 23, 42, 0.04);
  --color-shadow-md: rgba(99, 102, 241, 0.12);

  /* Typography */
  --font-display: 'Plus Jakarta Sans', system-ui, sans-serif;
  --font-body: 'Plus Jakarta Sans', system-ui, sans-serif;
  --font-reading: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing Scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  /* Animations */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

html[data-theme="dark"] {
  /* Modern 2026 Vibrant Dark Mode (Linear/Vercel/Arc style) */
  --color-bg: #0b0f19;               /* Deep rich indigo black */
  --color-surface: #111827;          /* Sleek dark surface */
  --color-surface-soft: #1e293b;     /* Slightly lighter dark panel */
  --color-text: #f8fafc;             /* High contrast slate text */
  --color-text-muted: #94a3b8;       /* Cool ash gray */
  --color-accent: #818cf8;           /* Glowing Indigo */
  --color-accent-hover: #a5b4fc;
  --color-accent-light: #1e1b4b;
  --color-accent-2: #a78bfa;         /* Glowing Purple */
  --color-accent-2-hover: #c084fc;
  --color-accent-emerald: #34d399;   /* Glowing Emerald */
  --color-accent-cyan: #22d3ee;      /* Glowing Cyan */
  --color-border: #1e293b;           /* Slate border */
  --color-shadow: rgba(0, 0, 0, 0.4);
  --color-shadow-md: rgba(99, 102, 241, 0.25);
}

/* Base resets & standard typographic classes */
body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.6;
  margin: 0;
  padding: 0;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Focus States */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Layout Page Fade-In Transition */
.page-fade-in {
  animation: pageFadeIn var(--transition-slow) ease-out forwards;
}

@keyframes pageFadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Gradient text utilities */
.gradient-text {
  background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #ec4899 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

html[data-theme="dark"] .gradient-text {
  background: linear-gradient(135deg, #818cf8 0%, #c084fc 50%, #f472b6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Gradient background utilities */
.gradient-bg-primary {
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
}

.gradient-bg-teal {
  background: linear-gradient(135deg, #0d9488 0%, #06b6d4 100%);
}

.gradient-bg-purple-pink {
  background: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
}

/* Glassmorphism & Deckled Card Modernization */
.deckled-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: 0 4px 20px var(--color-shadow);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  position: relative;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.deckled-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-2) 50%, var(--color-accent-cyan) 100%);
  border-bottom-left-radius: var(--radius-lg);
  border-bottom-right-radius: var(--radius-lg);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.deckled-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px var(--color-shadow-md);
  border-color: rgba(99, 102, 241, 0.4);
}

.deckled-card:hover::after {
  opacity: 1;
}

/* Glassmorphic Panel */
.glass-panel {
  background-color: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(226, 232, 240, 0.8);
}

html[data-theme="dark"] .glass-panel {
  background-color: rgba(17, 24, 39, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* Glowing Border Accent */
.glow-accent {
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.2);
}

/* Modern Typography Headers */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--color-text);
  line-height: 1.25;
  margin-top: 0;
  letter-spacing: -0.02em;
}

/* Global Navigation & Theme Styling Overrides */
header {
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 1px 10px var(--color-shadow);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

html[data-theme="dark"] header {
  background-color: rgba(11, 15, 25, 0.85);
}

/* Micro-interactions & animations on hover */
.hover-lift {
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.hover-lift:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--color-shadow-md);
}

/* Modal overlay system */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
  background: rgba(11, 15, 25, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.modal.active {
  display: flex;
  opacity: 1;
}

.modal-content {
  max-height: 90vh;
  overflow-y: auto;
  animation: modalRise var(--transition-normal) ease-out forwards;
}

@keyframes modalRise {
  from { opacity: 0; transform: translateY(12px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* Reusable Button Style Classes */
.btn-primary {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-2) 100%);
  color: #ffffff;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  box-shadow: 0 2px 10px rgba(99, 102, 241, 0.25);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.35);
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}
.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-1px);
}

.btn-danger {
  background-color: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(239, 68, 68, 0.2);
  transition: all var(--transition-fast);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}
.btn-danger:hover {
  background-color: #ef4444;
  color: #ffffff;
  border-color: #ef4444;
  transform: translateY(-1px);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-text-muted);
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}
.btn-ghost:hover {
  color: var(--color-text);
  background-color: var(--color-surface-soft);
}

/* Reduced Motion fallback */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-delay: 0s !important;
    animation-duration: 0s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0s !important;
    scroll-behavior: auto !important;
  }
}