/* ═══════════════════════════════════════════
   DESIGN SYSTEM & TOKENS
═══════════════════════════════════════════ */
:root {
  /* Color Palette - Warm Light Theme with Burgundy Accent */
  --bg-primary: #FAF6F0;
  --bg-surface: #F3EDE2;
  --bg-surface-glass: rgba(243, 237, 226, 0.85);
  --border-color: #E4DCD3;
  --border-color-hover: #6B1E2B;
  
  /* Accent Colors */
  --accent-primary: #6B1E2B;               /* Burgundy Primary */
  --accent-secondary: #8B2F3D;             /* Burgundy Light */
  --accent-gradient: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);

  /* Typography Colors */
  --text-primary: #1A1615;
  --text-secondary: #615C5A;
  --text-muted: #8E8683;
  
  /* Fonts */
  --font-display: 'Playfair Display', serif;
  --font-sans: 'Plus Jakarta Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 5rem;
  
  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ═══════════════════════════════════════════
   RESET & BASICS
═══════════════════════════════════════════ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Keyboard Focus States */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 4px;
}

/* Base Headings & Links */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  color: var(--text-primary);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

/* Grid overlay background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: 
    linear-gradient(rgba(26, 22, 21, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 22, 21, 0.02) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

/* ═══════════════════════════════════════════
   NAVIGATION
═══════════════════════════════════════════ */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 70px;
  padding: 0 4rem;
  background: var(--bg-surface-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  transition: background var(--transition-normal);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--accent-primary);
  letter-spacing: -0.03em;
  text-shadow: 0 0 15px rgba(107, 30, 43, 0.1);
}

.nav-logo span {
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
}

.nav-links a:hover {
  color: var(--accent-primary);
}

.nav-cv {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-primary);
  border: 1px solid var(--accent-primary);
  padding: 0.5rem 1.2rem;
  border-radius: 4px;
  transition: all var(--transition-fast);
}

.nav-cv:hover {
  background: rgba(107, 30, 43, 0.06);
  box-shadow: 0 0 15px rgba(107, 30, 43, 0.15);
}

.nav-mobile-btn {
  display: none;
  background: none;
  border: none;
  color: var(--accent-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ═══════════════════════════════════════════
   HERO SECTION
═══════════════════════════════════════════ */
#hero {
  position: relative;
  min-height: 100vh;
  padding-top: 100px;
  display: flex;
  align-items: center;
  z-index: 2;
}

.hero-container {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-xl);
  align-items: center;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 0 2rem;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-location {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-primary);
  background: rgba(107, 30, 43, 0.05);
  border: 1px solid rgba(107, 30, 43, 0.15);
  padding: 0.4rem 0.9rem;
  border-radius: 20px;
  margin-bottom: var(--space-md);
}

.hero-name {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.hero-role {
  font-size: clamp(1.2rem, 2.5vw, 1.8rem);
  font-weight: 700;
  color: var(--accent-secondary);
  margin-bottom: var(--space-md);
  letter-spacing: -0.01em;
}

.hero-tagline {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: var(--space-lg);
  line-height: 1.6;
}

/* Hero Media - Drop-in aspect ratio safe photo styling */
.hero-media {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero-media::before {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  max-width: 320px;
  aspect-ratio: 1;
  background: radial-gradient(circle, rgba(107, 30, 43, 0.06) 0%, transparent 70%);
  z-index: -1;
  filter: blur(20px);
}

.hero-image-wrapper {
  width: 100%;
  max-width: 320px;
  aspect-ratio: 1;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  box-shadow: 0 15px 35px rgba(26, 22, 21, 0.08);
  transition: border-color var(--transition-normal), transform var(--transition-normal);
}

.hero-image-wrapper:hover {
  border-color: var(--accent-primary);
  transform: translateY(-4px);
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ═══════════════════════════════════════════
   BUTTONS
═══════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.8rem;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--accent-gradient);
  color: var(--bg-primary);
  box-shadow: 0 4px 20px rgba(107, 30, 43, 0.15);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(107, 30, 43, 0.25);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  border-color: var(--accent-secondary);
  background: rgba(139, 47, 61, 0.05);
  transform: translateY(-2px);
}

.cta-group {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
}

/* ═══════════════════════════════════════════
   SECTION COMMONS
═══════════════════════════════════════════ */
section {
  position: relative;
  padding: var(--space-xl) 2rem;
  z-index: 2;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
}

.section-header {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: var(--space-lg);
}

.section-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-primary);
  letter-spacing: 0.1em;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  letter-spacing: -0.02em;
}

.section-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border-color), transparent);
}

/* Scroll Reveal States */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ═══════════════════════════════════════════
   ABOUT SECTION
═══════════════════════════════════════════ */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-lg);
  align-items: flex-start;
}

.about-text p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: var(--space-sm);
}

.about-text strong {
  color: var(--text-primary);
}

.about-text .cyan {
  color: var(--accent-secondary);
}

/* JSON Code Block decoration */
.code-block {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 15px 30px rgba(26, 22, 21, 0.06);
}

.code-block-header {
  background: rgba(26, 22, 21, 0.02);
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 6px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot.r { background: #ff5f56; }
.dot.y { background: #ffbd2e; }
.dot.g { background: #27c93f; }

.code-filename {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-left: 8px;
}

.code-body {
  padding: 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.code-kw { color: #8A2F3D; font-weight: 600; }
.code-var { color: #615C5A; }
.code-str { color: #2E5A44; }

/* ═══════════════════════════════════════════
   EXPERIENCE SECTION
═══════════════════════════════════════════ */
.exp-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.exp-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  transition: border-color var(--transition-normal), transform var(--transition-normal);
}

.exp-card:hover {
  border-color: var(--border-color-hover);
  transform: translateY(-2px);
}

.exp-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  margin-bottom: var(--space-xs);
}

.exp-role {
  font-size: 1.2rem;
  font-weight: 750;
  color: var(--text-primary);
}

.exp-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-secondary);
}

.exp-org {
  font-size: 0.95rem;
  color: var(--accent-primary);
  margin-bottom: var(--space-sm);
}

.exp-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: var(--space-md);
}

.exp-tags,
.project-stack {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.tag,
.stack-item {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  padding: 0.3rem 0.8rem;
  border-radius: 4px;
}

/* ═══════════════════════════════════════════
   PROJECTS SECTION
═══════════════════════════════════════════ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-lg);
}

.project-card {
  background: var(--bg-surface-glass);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  transition: all var(--transition-normal);
}

.project-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-4px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
}

.project-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-primary);
}

.project-name {
  font-size: 1.3rem;
  font-weight: 750;
  color: var(--text-primary);
}

.project-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  flex-grow: 1;
}

.project-links {
  display: flex;
  gap: 1rem;
  margin-top: var(--space-xs);
}

.proj-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.4rem 1rem;
  border-radius: 4px;
}

.proj-link.demo {
  background: var(--accent-primary);
  color: var(--bg-dark);
  font-weight: 700;
}

.proj-link.code {
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.proj-link.code:hover {
  border-color: var(--accent-secondary);
  color: var(--accent-secondary);
}

/* ═══════════════════════════════════════════
   SKILLS SECTION
═══════════════════════════════════════════ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-lg);
}

.skill-group {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
}

.skill-group-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 750;
  color: var(--accent-secondary);
  margin-bottom: var(--space-md);
  border-left: 3px solid var(--accent-primary);
  padding-left: 0.8rem;
}

.skill-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.skill-chip {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  padding: 0.4rem 0.9rem;
  border-radius: 6px;
  transition: all var(--transition-fast);
}

.skill-chip:hover {
  border-color: var(--accent-primary);
  color: var(--text-primary);
  background: rgba(0, 255, 136, 0.05);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 255, 136, 0.1);
}

/* ═══════════════════════════════════════════
   CONTACT SECTION
═══════════════════════════════════════════ */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: var(--space-lg);
}

.contact-info p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: var(--space-md);
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

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

.contact-link-icon {
  color: var(--accent-secondary);
  font-weight: bold;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.form-label span {
  color: var(--accent-primary);
}

.form-input,
.form-textarea {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-family: var(--font-sans);
  padding: 0.8rem 1rem;
  border-radius: 6px;
  outline: none;
  transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--accent-primary);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-submit {
  background: var(--accent-gradient);
  color: var(--bg-primary);
  border: none;
  font-family: var(--font-mono);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.8rem;
  border-radius: 6px;
  cursor: pointer;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.form-submit:hover {
  opacity: 0.95;
  transform: translateY(-1px);
}

.form-submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ═══════════════════════════════════════════
   FOOTER
═══════════════════════════════════════════ */
footer {
  border-top: 1px solid var(--border-color);
  padding: 2rem 4rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

footer span {
  color: var(--accent-primary);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--text-secondary);
}

.footer-links a:hover {
  color: var(--accent-primary);
}

/* ═══════════════════════════════════════════
   RESPONSIVENESS (MEDIA QUERIES)
═══════════════════════════════════════════ */
@media (max-width: 900px) {
  nav {
    padding: 0 2rem;
  }

  .nav-links {
    display: none; /* Controlled by JS via .active */
    flex-direction: column;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    padding: 2rem;
    gap: 1.5rem;
  }

  .nav-links.active {
    display: flex;
  }

  .nav-mobile-btn {
    display: block;
  }

  .nav-cv {
    display: none; /* Hide default nav CV on mobile header, can link in list if needed */
  }

  .hero-container {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    text-align: center;
    padding-top: var(--space-sm);
  }

  .hero-content {
    align-items: center;
  }

  .hero-tagline {
    margin-left: auto;
    margin-right: auto;
  }

  .cta-group {
    justify-content: center;
    width: 100%;
  }

  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  footer {
    flex-direction: column;
    gap: 1rem;
    padding: 2rem;
    text-align: center;
  }
}

/* ═══════════════════════════════════════════
   ACCESSIBILITY & PREFERS-REDUCED-MOTION
═══════════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-delay: -1ms !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    background-attachment: initial !important;
    scroll-behavior: auto !important;
    transition-duration: 0s !important;
    transition-delay: 0s !important;
  }

  .reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}