/* =============================================================
   CHRIS CARRIER — Design System v2
   Clean · Professional · Light
   ============================================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* Backgrounds */
  --bg:           #f8f9fa;
  --bg-white:     #ffffff;
  --bg-subtle:    #f1f3f5;

  /* Borders */
  --border:       #e5e7eb;
  --border-subtle:#f0f1f3;

  /* Accent — clean blue */
  --accent:       #1d4ed8;
  --accent-mid:   #3b82f6;
  --accent-light: #eff6ff;

  /* Text */
  --text:         #111827;
  --text-secondary: #4b5563;
  --text-muted:   #9ca3af;

  /* Status */
  --green:        #10b981;
  --orange:       #f59e0b;

  /* Typography */
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Layout */
  --nav-h:        64px;
  --section-py:   96px;
  --container:    1100px;

  /* Radii */
  --r-sm:         6px;
  --r-md:         10px;
  --r-lg:         14px;

  /* Shadows */
  --shadow-sm:    0 1px 3px rgba(0,0,0,0.07), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:    0 4px 14px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --dur:  0.18s;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

.section {
  padding: var(--section-py) 0;
}

.section-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(26px, 3.5vw, 38px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--text);
  margin-bottom: 14px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 520px;
  line-height: 1.75;
}

/* =============================================================
   NAVIGATION
   ============================================================= */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(248, 249, 250, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.nav.scrolled {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

.nav__logo {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}
.nav__logo span { color: var(--accent); }

.nav__links {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav__link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: var(--r-sm);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.nav__link:hover { color: var(--text); background: var(--bg-subtle); }
.nav__link.active { color: var(--accent); background: var(--accent-light); }

.nav__cta {
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  padding: 7px 18px;
  border-radius: 100px;
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.nav__cta:hover {
  background: var(--accent-mid);
  transform: translateY(-1px);
}

.nav__mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}
.nav__mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

/* =============================================================
   HERO
   ============================================================= */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  border-bottom: 1px solid var(--border);
  background: var(--bg-white);
}

.hero__inner {
  max-width: 680px;
  padding: 60px 0;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 28px;
  animation: fadeUp 0.5s var(--ease) both;
}
.hero__eyebrow .dot {
  width: 7px; height: 7px;
  background: var(--green);
  border-radius: 50%;
}

.hero__name {
  font-size: clamp(44px, 7vw, 72px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--text);
  margin-bottom: 20px;
  animation: fadeUp 0.5s 0.08s var(--ease) both;
}
.hero__name .gradient { color: var(--accent); }

.hero__tagline {
  font-size: clamp(16px, 2.2vw, 20px);
  font-weight: 400;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.5;
  animation: fadeUp 0.5s 0.12s var(--ease) both;
}

.hero__desc {
  font-size: 15px;
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: 40px;
  line-height: 1.8;
  animation: fadeUp 0.5s 0.16s var(--ease) both;
}

.hero__ctas {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  animation: fadeUp 0.5s 0.2s var(--ease) both;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  padding: 11px 22px;
  border-radius: 100px;
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.btn-primary:hover {
  background: var(--accent-mid);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(29, 78, 216, 0.22);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  background: transparent;
  border: 1px solid var(--border);
  padding: 10px 22px;
  border-radius: 100px;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.btn-secondary:hover {
  border-color: var(--text-secondary);
  background: var(--bg-subtle);
}

/* =============================================================
   AI PROJECTS
   ============================================================= */
.projects {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.projects__header {
  margin-bottom: 48px;
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.project-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
  opacity: 0;
  transform: translateY(16px);
  cursor: pointer;
}
.project-card.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease),
              box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.project-card:hover {
  border-color: #d1d5db;
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.project-card__icon {
  width: 40px; height: 40px;
  background: var(--bg-subtle);
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.project-card__meta {
  display: flex;
  align-items: center;
  gap: 8px;
}

.project-card__tag {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-light);
  padding: 3px 9px;
  border-radius: 100px;
}

.project-card__status {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 5px;
}
.project-card__status .dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--green);
}
.project-card__status .dot.orange { background: var(--orange); }

.project-card__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}

.project-card__desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
}

.project-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
}

.project-card__techs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.tech-badge {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 4px;
}

.project-card__arrow {
  color: var(--text-muted);
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
  font-size: 15px;
}
.project-card:hover .project-card__arrow {
  color: var(--accent);
  transform: translate(2px, -2px);
}

.supabase-note {
  margin-top: 36px;
  font-size: 13px;
  color: var(--text-muted);
}

/* =============================================================
   CODENAME: MERIDIAN
   ============================================================= */
.meridian {
  background: #111827;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.meridian__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.meridian__codename {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-mid);
  margin-bottom: 10px;
}

.meridian__title {
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 16px;
  color: #ffffff;
}

.meridian__desc {
  font-size: 15px;
  color: rgba(255,255,255,0.6);
  line-height: 1.8;
  margin-bottom: 28px;
}

.meridian__features {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 36px;
}

.meridian__feature {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  line-height: 1.5;
}

.meridian__feature-icon {
  font-size: 14px;
  color: var(--accent-mid);
  margin-top: 1px;
  flex-shrink: 0;
}

.meridian__ctas {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* Meridian button overrides for dark background */
.meridian .btn-secondary {
  color: rgba(255,255,255,0.85);
  border-color: rgba(255,255,255,0.25);
}
.meridian .btn-secondary:hover {
  border-color: rgba(255,255,255,0.5);
  background: rgba(255,255,255,0.08);
}

/* Meridian tech stack */
.meridian__techs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
}

.meridian__tech-badge {
  font-size: 11px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: var(--r-sm);
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.14);
  color: rgba(255,255,255,0.65);
  letter-spacing: 0.02em;
}

/* Meridian info card */
.meridian__card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--r-lg);
  padding: 40px;
}

.meridian__card-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  color: rgba(255,255,255,0.45);
  margin-bottom: 36px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.meridian__card-label::before {
  content: '';
  width: 8px; height: 8px;
  background: var(--orange);
  border-radius: 50%;
}

.meridian__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px 20px;
}

.meridian__stat-num {
  display: block;
  font-size: 26px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.meridian__stat-label {
  display: block;
  font-size: 12px;
  color: rgba(255,255,255,0.4);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Meridian AI build stats strip */
.meridian__scale {
  display: flex;
  flex-direction: column;
  gap: 32px;
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.meridian__scale-eyebrow {
  display: block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-mid);
  margin-bottom: 10px;
}

.meridian__scale-desc {
  font-size: 14px;
  color: rgba(255,255,255,0.55);
  line-height: 1.7;
  max-width: 560px;
}

.meridian__scale-stats {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}

.meridian__scale-stat {
  text-align: center;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--r-md);
  padding: 16px 8px;
}

.meridian__scale-num {
  display: block;
  font-size: 22px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.02em;
  margin-bottom: 5px;
}

.meridian__scale-label {
  display: block;
  font-size: 10px;
  color: rgba(255,255,255,0.4);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  line-height: 1.4;
}

/* Team breakdown table */
.meridian__teams-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.3);
  margin-bottom: 12px;
}

.meridian__teams-grid {
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--r-md);
  overflow: hidden;
  max-width: 480px;
}

.meridian__team-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 11px 20px;
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.meridian__team-row:last-child { border-bottom: none; }

.meridian__team-header {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.22);
  background: rgba(255,255,255,0.03);
  padding: 9px 20px;
}

.meridian__team-highlight {
  background: rgba(29, 78, 216, 0.18);
  color: #ffffff;
  font-weight: 600;
}
.meridian__team-highlight span:last-child {
  color: var(--accent-mid);
}

/* =============================================================
   RESUME / CV
   ============================================================= */
.resume {
  background: var(--bg-white);
  border-top: 3px solid var(--accent);
  box-shadow: inset 0 4px 24px rgba(29, 78, 216, 0.05);
}

.resume .section-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent);
}

.resume .section-title {
  font-size: clamp(28px, 4vw, 44px);
}

.resume .section-desc {
  font-size: 16px;
  max-width: 700px;
  white-space: nowrap;
}

.resume__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  margin-top: 56px;
}

.resume__col-title {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #1d4ed8;
  margin-bottom: 28px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

/* Timeline */
.timeline {
  display: flex;
  flex-direction: column;
}

.timeline-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0 20px;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease);
}
.timeline-item.visible {
  opacity: 1;
  transform: translateY(0);
}

.timeline-item__track {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 5px;
}
.timeline-item__dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: var(--bg);
  flex-shrink: 0;
}
.timeline-item__line {
  width: 1px;
  flex: 1;
  background: var(--border);
  min-height: 20px;
}
.timeline-item:last-child .timeline-item__line { display: none; }

.timeline-item__body { padding-bottom: 32px; }

.timeline-item__date {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #1d4ed8;
  margin-bottom: 6px;
}
.timeline-item__role {
  font-size: 18px;
  font-weight: 700;
  color: #111827;
  line-height: 1.35;
  margin-bottom: 4px;
}
.timeline-item__company {
  font-size: 15px;
  font-weight: 500;
  color: #374151;
  margin-bottom: 10px;
}
.timeline-item__desc {
  font-size: 15px;
  font-weight: 400;
  color: #6b7280;
  line-height: 1.7;
}

/* Skills */
.skills-groups {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.skills-group__name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.skills-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tag {
  font-size: 13px;
  font-weight: 400;
  color: var(--text-secondary);
  background: var(--bg-white);
  border: 1px solid var(--border);
  padding: 5px 13px;
  border-radius: var(--r-sm);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.skill-tag:hover {
  color: var(--accent);
  border-color: var(--accent-mid);
}

.resume__cta {
  margin-top: 40px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* =============================================================
   FOOTER
   ============================================================= */
.footer {
  padding: 36px 0;
  border-top: 1px solid var(--border);
  background: var(--bg-white);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer__copy {
  font-size: 13px;
  color: var(--text-muted);
}

.footer__links {
  display: flex;
  gap: 24px;
}

.footer__link {
  font-size: 13px;
  color: var(--text-muted);
  transition: color var(--dur) var(--ease);
}
.footer__link:hover { color: var(--text); }

/* =============================================================
   ANIMATIONS
   ============================================================= */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* =============================================================
   RESPONSIVE
   ============================================================= */
@media (max-width: 900px) {
  :root { --section-py: 72px; }

  .nav__links { display: none; }
  .nav__cta   { display: none; }
  .nav__mobile-toggle { display: flex; }

  .nav.mobile-open .nav__links {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border);
    padding: 16px;
    gap: 4px;
  }
  .nav.mobile-open .nav__mobile-toggle span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  .nav.mobile-open .nav__mobile-toggle span:nth-child(2) { opacity: 0; }
  .nav.mobile-open .nav__mobile-toggle span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .meridian__inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .meridian__scale-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .meridian__teams-grid {
    max-width: 100%;
  }

  .resume__layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}

@media (max-width: 600px) {
  :root { --section-py: 56px; }
  .container { padding: 0 20px; }
  .nav__inner { padding: 0 20px; }
  .footer__inner { flex-direction: column; align-items: flex-start; }
}