/* ============================================================
   AKASH HARIJAN — PORTFOLIO
   Analytics-dashboard aesthetic: deep navy base, slate surfaces,
   electric-blue accent, monospace numbers.
   ============================================================ */

/* ── DESIGN TOKENS ─────────────────────────────────────────── */
:root {
  /* Palette */
  --bg:          #0d1117;   /* near-black navy — page background   */
  --surface:     #161b22;   /* slightly lighter — cards, nav       */
  --surface-2:   #1c2230;   /* raised surfaces, alt sections       */
  --border:      #2a3347;   /* subtle dividers                     */
  --accent:      #3b82f6;   /* electric blue — primary action      */
  --accent-dim:  #1d4ed8;   /* darker blue — hover                 */
  --accent-glow: rgba(59, 130, 246, 0.15);
  --up:          #22c55e;   /* positive delta (green)              */
  --down:        #f87171;   /* negative delta (red)                */

  /* Text */
  --text-primary:   #e6edf3;
  --text-secondary: #8b98a9;
  --text-muted:     #576172;

  /* Typography */
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body:    'Inter', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing scale */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout */
  --max-width: 1100px;
  --nav-height: 64px;

  /* Radius */
  --radius-sm: 4px;
  --radius:    8px;
  --radius-lg: 12px;

  /* Transitions */
  --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  background-color: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; font: inherit; border: none; background: none; }

/* Focus ring — visible keyboard nav */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}
:focus:not(:focus-visible) { outline: none; }

/* ── LAYOUT UTILITIES ───────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

@media (max-width: 640px) {
  .container { padding-inline: var(--space-4); }
}

.section {
  padding-block: var(--space-24);
}

.section--alt {
  background-color: var(--surface-2);
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-3);
}

.section-heading {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-10);
  line-height: 1.2;
}

/* ── REVEAL ANIMATION ───────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ── HEADER / NAV ───────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background-color: rgba(13, 17, 23, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--text-primary);
  transition: opacity var(--transition);
}

.logo:hover { opacity: 0.8; }

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.primary-nav ul {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.primary-nav a {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition), background-color var(--transition);
}

.primary-nav a:hover,
.primary-nav a:focus-visible {
  color: var(--text-primary);
  background-color: var(--surface);
}

.nav-cta {
  background-color: var(--accent) !important;
  color: #fff !important;
  padding: var(--space-2) var(--space-4) !important;
  border-radius: var(--radius-sm) !important;
}

.nav-cta:hover, .nav-cta:focus-visible {
  background-color: var(--accent-dim) !important;
  color: #fff !important;
}

/* Hamburger */
.nav-toggle {
  display: none;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
}

.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.hamburger {
  position: relative;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
}

.hamburger::before { top: -6px; }
.hamburger::after  { top: 6px; }

/* Open state */
.nav-toggle[aria-expanded="true"] .hamburger { background: transparent; }
.nav-toggle[aria-expanded="true"] .hamburger::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .hamburger::after  { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 768px) {
  .nav-toggle { display: flex; align-items: center; }

  .primary-nav {
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background-color: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: var(--space-4) var(--space-6);
    display: none;
  }

  .primary-nav.is-open { display: block; }

  .primary-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-1);
  }

  .primary-nav a {
    display: block;
    width: 100%;
    padding: var(--space-3) var(--space-4);
  }
}

/* ── HERO ───────────────────────────────────────────────────── */
.hero {
  padding-block: var(--space-24) var(--space-20);
  position: relative;
  overflow: hidden;
}

/* Subtle grid background */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.35;
  pointer-events: none;
}

/* Accent glow blob */
.hero::after {
  content: '';
  position: absolute;
  top: -120px;
  left: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(59,130,246,0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero .container {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

/* Hero left content */
.hero-content { z-index: 1; }

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--up);
  letter-spacing: 0.06em;
  margin-bottom: var(--space-5);
}

.eyebrow-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  background: var(--up);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.75); }
}

@media (prefers-reduced-motion: reduce) {
  .eyebrow-dot { animation: none; }
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 5rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.hero-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-5);
}

.hero-tagline {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.65;
  max-width: 42ch;
  margin-bottom: var(--space-8);
}

/* Contact chips */
.hero-contacts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-10);
}

.contact-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.78rem;
  color: var(--text-secondary);
  transition: border-color var(--transition), color var(--transition), background-color var(--transition);
}

.contact-chip:hover,
.contact-chip:focus-visible {
  border-color: var(--accent);
  color: var(--text-primary);
  background-color: var(--accent-glow);
}

.contact-chip svg { flex-shrink: 0; }

/* Stat tiles */
.stat-tiles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}

.stat-tile {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-4) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
}

.stat-tile::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  opacity: 0;
  transition: opacity var(--transition);
}

.stat-tile:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.stat-tile:hover::before { opacity: 1; }

.stat-number {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1;
}

.stat-plus {
  font-size: 1rem;
  color: var(--accent);
}

.stat-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.3;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Hero graphic — dashboard mockup */
.hero-graphic {
  display: flex;
  justify-content: flex-end;
  align-items: flex-start;
  z-index: 1;
}

.dash-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 0 0 1px rgba(59,130,246,0.08), 0 20px 60px rgba(0,0,0,0.4);
}

.dash-card-header {
  padding: var(--space-3) var(--space-5);
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.dash-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
}

.dash-metric {
  background: var(--surface);
  padding: var(--space-4) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.dash-metric-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.dash-metric-value {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1;
}

.dash-metric-delta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
}

.dash-metric-delta.up   { color: var(--up); }
.dash-metric-delta.down { color: var(--down); }

.mini-chart {
  padding: var(--space-3) var(--space-4) 0;
  height: 64px;
}

.mini-chart svg {
  width: 100%;
  height: 100%;
}

@media (max-width: 900px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }
  .hero-graphic {
    justify-content: flex-start;
  }
  .dash-card { max-width: 100%; }
  .stat-tiles { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 480px) {
  .stat-tiles { grid-template-columns: 1fr 1fr; }
  .stat-tiles .stat-tile:last-child { grid-column: span 2; }
}

/* ── ABOUT ──────────────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
}

.about-text p {
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: var(--space-4);
}

.about-text p:last-child { margin-bottom: 0; }

.about-highlights {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.highlight-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
  transition: border-color var(--transition);
}

.highlight-item:hover { border-color: var(--accent); }
.highlight-item svg   { flex-shrink: 0; margin-top: 2px; }

@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; gap: var(--space-8); }
}

/* ── EXPERIENCE / TIMELINE ──────────────────────────────────── */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.timeline-item {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 0 var(--space-5);
  position: relative;
}

.timeline-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: var(--space-1);
}

.marker-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 2px var(--accent);
  flex-shrink: 0;
  z-index: 1;
  transition: box-shadow var(--transition);
}

.timeline-item:hover .marker-dot {
  box-shadow: 0 0 0 4px var(--accent-glow), 0 0 0 2px var(--accent);
}

.marker-line {
  flex: 1;
  width: 1px;
  background: var(--border);
  margin-top: var(--space-2);
  min-height: var(--space-8);
}

.timeline-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.timeline-item:hover .timeline-card {
  border-color: rgba(59,130,246,0.4);
  box-shadow: 0 4px 24px rgba(0,0,0,0.2);
}

.timeline-card-header {
  margin-bottom: var(--space-5);
}

.timeline-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  flex-wrap: wrap;
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.04em;
  background: var(--accent-glow);
  border: 1px solid rgba(59,130,246,0.2);
  border-radius: var(--radius-sm);
  padding: 2px var(--space-2);
}

.timeline-location {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.timeline-role {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.timeline-company {
  font-size: 0.875rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.part-time-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 2px var(--space-2);
}

.timeline-bullets {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.timeline-bullets li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
  padding-left: var(--space-4);
  position: relative;
}

.timeline-bullets li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.timeline-bullets strong {
  color: var(--text-primary);
  font-weight: 600;
}

@media (max-width: 600px) {
  .timeline-item { grid-template-columns: 24px 1fr; gap: 0 var(--space-3); }
  .timeline-card { padding: var(--space-5) var(--space-4); }
}

/* ── SKILLS ─────────────────────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.skill-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.skill-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.skill-card:hover {
  border-color: rgba(59,130,246,0.4);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.25);
}

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

.skill-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: var(--accent-glow);
  border: 1px solid rgba(59,130,246,0.2);
  border-radius: var(--radius);
  color: var(--accent);
  flex-shrink: 0;
}

.skill-name {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.3;
}

.skill-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.55;
}

@media (max-width: 900px) {
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 500px) {
  .skills-grid { grid-template-columns: 1fr; }
}

/* ── TOOLS ──────────────────────────────────────────────────── */
.tools-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.tool-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  transition: border-color var(--transition), color var(--transition), background-color var(--transition);
  cursor: default;
}

.tool-badge:hover {
  border-color: var(--accent);
  color: var(--text-primary);
  background-color: var(--accent-glow);
}

/* ── EDUCATION ──────────────────────────────────────────────── */
.edu-card {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-8);
  max-width: 540px;
  transition: border-color var(--transition);
}

.edu-card:hover { border-color: rgba(59,130,246,0.4); }

.edu-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  background: var(--accent-glow);
  border: 1px solid rgba(59,130,246,0.2);
  border-radius: var(--radius);
  color: var(--accent);
  flex-shrink: 0;
}

.edu-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-width: 0; /* prevent text overflow in flex container */
}

.edu-degree {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.edu-institution {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.edu-dates {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.04em;
  background: var(--accent-glow);
  border: 1px solid rgba(59,130,246,0.2);
  border-radius: var(--radius-sm);
  padding: 2px var(--space-2);
  display: inline-block;
}

@media (max-width: 480px) {
  .edu-card {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-5);
  }
}

/* ── CONTACT ────────────────────────────────────────────────── */
.contact-intro {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 55ch;
  margin-bottom: var(--space-10);
  line-height: 1.65;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-12);
  align-items: start;
}

.contact-details-heading,
.contact-form-heading {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-5);
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.contact-list li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.contact-list li svg { flex-shrink: 0; color: var(--accent); }

.contact-list a {
  color: var(--text-secondary);
  transition: color var(--transition);
  word-break: break-all;
}

.contact-list a:hover,
.contact-list a:focus-visible {
  color: var(--accent);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 600;
  font-family: var(--font-body);
  transition: background-color var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}

.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--accent-dim);
  border-color: var(--accent-dim);
}

.btn--outline {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}

.btn--outline:hover,
.btn--outline:focus-visible {
  border-color: var(--accent);
  color: var(--text-primary);
  background: var(--accent-glow);
}

/* Form */
.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.form-field label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.03em;
}

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

.form-field input,
.form-field textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-3) var(--space-4);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.5;
  width: 100%;
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: var(--text-muted);
}

.form-field input:hover,
.form-field textarea:hover {
  border-color: rgba(59,130,246,0.4);
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-field input.is-invalid,
.form-field textarea.is-invalid {
  border-color: var(--down);
  box-shadow: 0 0 0 3px rgba(248,113,113,0.15);
}

.field-error {
  font-size: 0.78rem;
  color: var(--down);
  font-family: var(--font-mono);
  min-height: 1rem;
  display: block;
}

.form-success {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-4);
  padding: var(--space-4);
  background: rgba(34,197,94,0.1);
  border: 1px solid rgba(34,197,94,0.25);
  border-radius: var(--radius);
  font-size: 0.875rem;
  color: var(--up);
  line-height: 1.5;
}

.form-success[hidden] { display: none; }

@media (max-width: 768px) {
  .contact-layout {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

/* ── FOOTER ─────────────────────────────────────────────────── */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding-block: var(--space-8);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-5);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-4);
}

.footer-nav a {
  font-size: 0.8rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer-nav a:hover,
.footer-nav a:focus-visible {
  color: var(--accent);
}

.footer-copy {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  width: 100%;
  text-align: center;
  border-top: 1px solid var(--border);
  padding-top: var(--space-5);
  margin-top: var(--space-4);
}

@media (max-width: 640px) {
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .footer-copy  { text-align: left; }
}

/* ── SCROLLBAR ──────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ── SELECTION ──────────────────────────────────────────────── */
::selection {
  background: rgba(59,130,246,0.3);
  color: var(--text-primary);
}