/* =================================
   ROHN JACOB S - PORTFOLIO
   Main Stylesheet
   shadcn/Tailwind Design System
   ================================= */

/* CSS Variables - Design Tokens */
:root {
  /* Colors - shadcn palette */
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --slate-950: #020617;

  --blue-400: #60a5fa;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;

  --purple-400: #c084fc;
  --purple-500: #a855f7;
  --purple-600: #9333ea;

  /* Semantic colors */
  --color-background: #ffffff;
  --color-foreground: var(--slate-900);
  --color-muted: var(--slate-100);
  --color-muted-foreground: var(--slate-600);
  --color-border: var(--slate-200);
  --color-primary: var(--blue-600);
  --color-primary-hover: var(--blue-700);
  --color-secondary: var(--purple-600);
  --color-accent: var(--blue-500);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);

  /* Transitions */
  --transition-base: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
  :root {
    --color-background: var(--slate-950);
    --color-foreground: var(--slate-50);
    --color-muted: var(--slate-900);
    --color-muted-foreground: var(--slate-400);
    --color-border: var(--slate-800);
  }
}

/* Reset & Base Styles */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-foreground);
  background-color: var(--color-background);
  overflow-x: hidden;
}

.antialiased {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.scroll-smooth {
  scroll-behavior: smooth;
}

/* Container */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

@media (min-width: 640px) {
  .container {
    padding: 0 var(--spacing-xl);
  }
}

/* Sections */
.section {
  padding: var(--spacing-4xl) 0;
  position: relative;
}

.section-alt {
  background-color: var(--color-muted);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  font-size: 2.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-foreground);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.025em;
}

.section-divider {
  width: 64px;
  height: 4px;
  background: linear-gradient(90deg, var(--blue-500), var(--purple-500));
  margin: var(--spacing-lg) auto;
  border-radius: 2px;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--color-muted-foreground);
  max-width: 600px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .section {
    padding: var(--spacing-3xl) 0;
  }

  .section-title {
    font-size: 2rem;
  }
}

/* Navigation */
.nav-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition-smooth);
}

@media (prefers-color-scheme: dark) {
  .nav-bar {
    background: rgba(2, 6, 23, 0.8);
  }
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  text-decoration: none;
  transition: transform var(--transition-base);
}

.nav-logo:hover {
  transform: scale(1.05);
}

.nav-links {
  display: flex;
  gap: var(--spacing-xl);
  align-items: center;
}

.nav-link {
  color: var(--color-foreground);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  font-size: 0.9375rem;
  position: relative;
  transition: color var(--transition-base);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-smooth);
}

.nav-link:hover {
  color: var(--color-primary);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-foreground);
  transition: all var(--transition-base);
}

@media (max-width: 1024px) {
  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 0.625rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--color-foreground);
  border: 2px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(59, 130, 246, 0.05);
}

.btn-full {
  width: 100%;
}

/* Hero Section */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(135deg, var(--slate-50) 0%, #e0e7ff 100%);
}

@media (prefers-color-scheme: dark) {
  .hero-section {
    background: linear-gradient(135deg, var(--slate-950) 0%, #1e1b4b 100%);
  }
}

.mesh-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  padding: var(--spacing-xl);
  max-width: 900px;
}

.hero-text {
  animation: fadeInUp 1s ease-out;
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: var(--font-weight-extrabold);
  color: var(--color-foreground);
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.03em;
  text-shadow: 0 0 50px rgba(0, 0, 0, 0.1);
}

.hero-tagline {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  color: var(--color-muted-foreground);
  margin-bottom: var(--spacing-2xl);
  font-weight: var(--font-weight-medium);
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.scroll-indicator {
  position: absolute;
  bottom: var(--spacing-2xl);
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
}

.scroll-arrow {
  width: 24px;
  height: 24px;
  border-left: 2px solid var(--color-muted-foreground);
  border-bottom: 2px solid var(--color-muted-foreground);
  transform: rotate(-45deg);
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% {
    transform: rotate(-45deg) translateY(0);
  }
  50% {
    transform: rotate(-45deg) translateY(10px);
  }
}

/* About Section */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.about-image {
  position: relative;
}

.image-container {
  position: relative;
  border-radius: var(--radius-2xl);
  overflow: hidden;
}

.profile-image {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-2xl);
  transition: transform var(--transition-slow);
}

.image-container:hover .profile-image {
  transform: scale(1.05);
}

.image-border {
  position: absolute;
  top: -8px;
  left: -8px;
  right: 8px;
  bottom: 8px;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-2xl);
  pointer-events: none;
}

.about-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.about-text {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--color-muted-foreground);
}

.about-text strong {
  color: var(--color-foreground);
  font-weight: var(--font-weight-semibold);
}

@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  color: var(--color-foreground);
}

p {
  line-height: 1.7;
}

/* Utilities */
.text-center {
  text-align: center;
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

/* Responsive utilities */
@media (max-width: 640px) {
  .container {
    padding: 0 var(--spacing-md);
  }
}