@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;700;800&display=swap');

/* ==========================================================================
   Design Tokens & CSS Custom Properties
   ========================================================================== */
:root {
  --bg-color: #E0F2FE;         
  --card-bg: #FFFFFF;          
  --text-main: #0F172A;        
  --text-muted: #475569;       
  --accent-color: #0284C7;     
  --accent-hover: #0369A1;     
  --border-color: rgba(0, 0, 0, 0.08);
  --font-family: 'Salvatore', 'Plus Jakarta Sans', -apple-system, sans-serif;
}

/* ==========================================================================
   Global Reset & Base Transitions
   ========================================================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

/* Disable transitions during initial page render to prevent white-to-color transition flash on load */
html.is-loading,
html.is-loading * {
  -webkit-transition: none !important;
  -moz-transition: none !important;
  -o-transition: none !important;
  transition: none !important;
}

/* ==========================================================================
   Base Layout & Document Setup
   ========================================================================== */
html {
  background-color: var(--bg-color);
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  font-family: var(--font-family);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
  padding: 0 1.5rem;
  overflow-x: hidden;
  transition: background-color 0.25s ease, color 0.25s ease;
}

@media (max-width: 480px) {
  body {
    padding: 0 0.9rem;
  }
}

#root {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
}

.container {
  width: 100%;
  max-width: 960px;
}

/* ==========================================================================
   Shared Card Component Styles
   ========================================================================== */
.fact-card,
.project-card {
  position: relative;
  overflow: hidden;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.03);
  outline: none;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, background-color 0.25s ease, color 0.25s ease;
}

/* 45-Degree Diagonal One-Way Shine Beam */
.fact-card::after,
.project-card::after {
  content: '';
  position: absolute;
  top: -100%;
  left: -100%;
  width: 300%;
  height: 300%;
  background: linear-gradient(
    135deg,
    transparent 43%,
    rgba(255, 255, 255, 0.55) 50%,
    transparent 57%
  );
  pointer-events: none;
  z-index: 5;
  opacity: 0;
}

@keyframes diagonalShine {
  0% {
    transform: translate(-40%, -40%);
    opacity: 0;
  }
  20% {
    opacity: 1;
  }
  80% {
    opacity: 1;
  }
  100% {
    transform: translate(40%, 40%);
    opacity: 0;
  }
}

.fact-card:hover {
  transform: scale(1.02);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
  outline: none;
}

.project-card:hover {
  transform: scale(1.008);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.07);
  outline: none;
}

.fact-card:hover::after,
.project-card:hover::after {
  animation: diagonalShine 0.75s ease-in-out forwards;
}

/* ==========================================================================
   Button Components
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: var(--accent-color);
  color: #FFFFFF;
  text-decoration: none;
  padding: 0.85rem 1.8rem;
  border-radius: 999px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.3);
  transition: transform 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.btn:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 0 rgba(0, 0, 0, 0.3);
}

.btn-secondary {
  background-color: var(--card-bg);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.3);
  transition: transform 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.btn-secondary:hover {
  background-color: var(--text-main);
  color: var(--card-bg);
  box-shadow: 0 6px 0 rgba(0, 0, 0, 0.3);
}

/* ==========================================================================
   Accessibility Utilities
   ========================================================================== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--text-main);
  color: var(--card-bg);
  padding: 0.5rem 1rem;
  border-radius: 999px;
  font-weight: 700;
  z-index: 999;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1rem;
}

/* ==========================================================================
   Developer Mode Floating Tools Button (active when ?dev=true)
   ========================================================================== */
.dev-tools-fab {
  position: fixed;
  bottom: 1.5rem;
  left: 1.5rem;
  z-index: 9999;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--card-bg);
  color: var(--text-main);
  border: 1.5px solid var(--text-main);
  border-radius: 9999px;
  padding: 0.5rem 1rem;
  font-family: var(--font-family);
  font-size: 0.8125rem;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12), 0 2px 4px rgba(0, 0, 0, 0.08);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease, background-color 0.2s ease, color 0.2s ease;
  backdrop-filter: blur(8px);
}

.dev-tools-fab:hover {
  background-color: var(--text-main);
  color: var(--card-bg);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.18), 0 3px 6px rgba(0, 0, 0, 0.12);
}

.dev-tools-fab svg {
  width: 15px;
  height: 15px;
  stroke: currentColor;
  flex-shrink: 0;
}

.dev-tools-fab .dev-badge {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(0, 0, 0, 0.08);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
}

.dev-tools-fab:hover .dev-badge {
  background: rgba(255, 255, 255, 0.2);
}