/* ============================================================
   Tyler Graham — Portfolio
   Pure vanilla CSS3. Dark theme, mobile-first.
   ============================================================ */

:root {
  --bg-main: #0f172a;
  --bg-card: #1e293b;
  --text-primary: #f8fafc;
  --text-muted: #94a3b8;
  --accent: #06b6d4;
  --accent-hover: #0891b2;
  --border: #334155;
  --font-stack: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  --header-h: 4.25rem;
  --radius: 14px;
  --radius-sm: 10px;
  --max-w: 72rem;
  --max-w-narrow: 46rem;
  --shadow: 0 18px 40px rgba(2, 6, 23, 0.5);
  --transition: 200ms ease;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }

* {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
}

body {
  font-family: var(--font-stack);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }

a {
  color: var(--accent);
  text-decoration: none;
}

ul { list-style: none; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection {
  background: rgba(6, 182, 212, 0.3);
  color: var(--text-primary);
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -100%;
  background: var(--accent);
  color: #0b1220;
  padding: 0.6rem 1rem;
  border-radius: 8px;
  font-weight: 600;
  z-index: 100;
  transition: top var(--transition);
}

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

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.container-narrow { max-width: var(--max-w-narrow); }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: rgba(15, 23, 42, 0.72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.site-header.is-scrolled {
  background: rgba(15, 23, 42, 0.92);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 8px 24px rgba(2, 6, 23, 0.4);
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.18), rgba(6, 182, 212, 0.05));
  border: 1px solid rgba(6, 182, 212, 0.35);
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

/* ---------- Nav ---------- */
.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-list a {
  position: relative;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition);
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  height: 2px;
  width: 100%;
  transform: scaleX(0);
  transform-origin: left;
  background: var(--accent);
  transition: transform var(--transition);
}

.nav-list a:hover,
.nav-list a.active { color: var(--text-primary); }

.nav-list a.active::after { transform: scaleX(1); }

.nav-cta { display: inline-flex; }

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-primary);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}

.nav-toggle:hover { border-color: var(--accent); }

.icon-close { display: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.2;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
}

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

.btn-primary {
  background: var(--accent);
  color: #082f38;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--accent-hover);
  color: #e0fbff;
}

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

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

/* ---------- Section base ---------- */
.section {
  padding: 5rem 0;
  scroll-margin-top: var(--header-h);
}

.section-alt { background: rgba(30, 41, 59, 0.35); }

.section-title {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 1.1rem;
}

.section-title::after {
  content: "";
  display: block;
  width: 3rem;
  height: 4px;
  margin-top: 0.9rem;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.section-intro {
  color: var(--text-muted);
  font-size: 1.08rem;
  max-width: 40rem;
  margin-bottom: 2.75rem;
}

/* ---------- Hero ---------- */
.hero {
  padding: calc(var(--header-h) + 5rem) 0 4rem;
  /* subtle radial ambient glow */
  background:
    radial-gradient(60rem 32rem at 78% -10%, rgba(6, 182, 212, 0.16), transparent 60%),
    radial-gradient(40rem 28rem at 10% 110%, rgba(14, 165, 233, 0.10), transparent 60%),
    var(--bg-main);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: start;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-size: clamp(2.1rem, 5.5vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.08;
  max-width: 15ch;
  margin-bottom: 1.25rem;
}

.hero-sub {
  color: var(--text-muted);
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  max-width: 46ch;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

/* ---------- Stats ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.stat {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.25rem;
  text-align: center;
  transition: border-color var(--transition), transform var(--transition);
}

.stat:hover {
  border-color: rgba(6, 182, 212, 0.5);
  transform: translateY(-3px);
}

.stat-value {
  font-size: clamp(1.55rem, 4vw, 2rem);
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.stat-label {
  margin-top: 0.5rem;
  color: var(--text-muted);
  font-size: 0.88rem;
}

/* ---------- Prose (About) ---------- */
.prose p {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 1.25rem;
  max-width: 60ch;
}

.prose blockquote {
  margin-top: 2rem;
  padding: 1.5rem 1.75rem;
  border-left: 3px solid var(--accent);
  background: var(--bg-card);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-primary);
  font-size: 1.15rem;
  font-style: italic;
  line-height: 1.5;
}

/* ---------- Cards grid ---------- */
.grid { display: grid; gap: 1.5rem; }
.grid-3 { grid-template-columns: 1fr; }

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

.card:hover {
  border-color: rgba(6, 182, 212, 0.5);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.card-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
}

.card-icon {
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  flex-shrink: 0;
  border-radius: 10px;
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.3);
  color: var(--accent);
}

.card-list li {
  position: relative;
  padding-left: 1.4rem;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
  font-size: 0.98rem;
}

.card-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6rem;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--accent);
}

/* ---------- Work ---------- */
.work-grid { display: grid; gap: 1.5rem; }

.case { padding: 2rem; }

.case-tag {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.9rem;
}

.case-title {
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.case-client {
  color: var(--accent);
  font-weight: 600;
  font-size: 1rem;
  margin: 0.35rem 0 1.5rem;
}

.case-cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.case-label {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.case-block p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.case-results li {
  position: relative;
  padding-left: 1.4rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

.case-results li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--accent);
}

/* ---------- Contact ---------- */
.contact-intro {
  color: var(--text-muted);
  font-size: 1.15rem;
  max-width: 40rem;
  margin: 0 auto 2.5rem;
  text-align: center;
}

.section-alt .section-title,
.contact-intro { text-align: center; }

.section-alt .section-title::after { margin-inline: auto; }

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

.contact-actions .btn { padding-inline: 1.75rem; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-card);
  padding: 2.5rem 0 2rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  text-align: center;
}

.footer-brand {
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
}

.footer-nav,
.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.25rem;
}

.footer-nav a,
.footer-links a {
  color: var(--text-muted);
  font-size: 0.95rem;
  transition: color var(--transition);
}

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

.footer-copy {
  color: var(--text-muted);
  font-size: 0.85rem;
  opacity: 0.75;
}

/* ---------- Responsive: tablet ---------- */
@media (min-width: 640px) {
  .stats { grid-template-columns: repeat(4, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .case-cols { grid-template-columns: repeat(3, 1fr); }
}

/* ---------- Responsive: desktop ---------- */
@media (min-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

/* ---------- Mobile nav ---------- */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(15, 23, 42, 0.98);
    border-bottom: 1px solid var(--border);
    padding: 1rem 1.5rem 1.5rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  }

  .site-nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-bottom: 1rem;
  }

  .nav-list a {
    display: block;
    padding: 0.9rem 0.25rem;
    font-size: 1.05rem;
    border-bottom: 1px solid rgba(51, 65, 85, 0.5);
  }

  .nav-list a::after { display: none; }

  .nav-list a.active { color: var(--accent); }

  .nav-cta { display: flex; }

  body.menu-open {
    overflow: hidden;
  }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}