/* --------------------------------------------------------
   James Carroll — personal site
   Aesthetic: data-inspired color, generous whitespace, scroll-reveal
   -------------------------------------------------------- */

/* --- Reset & base --- */

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --blue:   hsl(210, 65%, 55%);
  --teal:   hsl(175, 50%, 42%);
  --coral:  hsl(8, 70%, 62%);
  --amber:  hsl(36, 80%, 55%);
  --violet: hsl(260, 45%, 58%);
  --slate:  hsl(210, 10%, 30%);

  --bg:     #fafaf8;
  --fg:     #1a1a1a;
  --muted:  #777;
  --faint:  #e4e4e0;
}

html {
  font-size: 18px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.65;
  overflow-x: hidden;
}

/* --- Dot grid canvas (background) --- */

.dots-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  opacity: 0.5;
}

/* --- Container --- */

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* --- Scroll reveal --- */

[data-scroll] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-scroll].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Hero --- */

.hero {
  min-height: 90vh;
  display: flex;
  align-items: flex-end;
  padding-bottom: 12vh;
}

.hero__name {
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.0;
  background: linear-gradient(135deg, var(--blue), var(--teal));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- About --- */

.about {
  padding: 4rem 0 6rem;
}

.about__text {
  font-size: 1.15rem;
  color: var(--slate);
  line-height: 1.7;
  max-width: 560px;
  margin-bottom: 1rem;
}

.about__text--secondary {
  font-size: 0.92rem;
  color: var(--muted);
}

/* --- Decorative bar chart --- */

.viz {
  padding: 2rem 0 4rem;
}

.bar-chart {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 120px;
  padding: 0 0.5rem;
}

.bar {
  flex: 1;
  height: 0;
  border-radius: 3px 3px 0 0;
  background: hsl(var(--hue), 55%, 58%);
  opacity: 0.7;
  transition: height 1s cubic-bezier(0.16, 1, 0.3, 1),
              opacity 0.6s ease;
}

.bar.is-visible {
  height: var(--height);
  opacity: 0.7;
}

.bar:hover {
  opacity: 1;
}

/* stagger the bars */
.bar:nth-child(1)  { transition-delay: 0.00s; }
.bar:nth-child(2)  { transition-delay: 0.05s; }
.bar:nth-child(3)  { transition-delay: 0.10s; }
.bar:nth-child(4)  { transition-delay: 0.15s; }
.bar:nth-child(5)  { transition-delay: 0.20s; }
.bar:nth-child(6)  { transition-delay: 0.25s; }
.bar:nth-child(7)  { transition-delay: 0.30s; }
.bar:nth-child(8)  { transition-delay: 0.35s; }
.bar:nth-child(9)  { transition-delay: 0.40s; }
.bar:nth-child(10) { transition-delay: 0.45s; }
.bar:nth-child(11) { transition-delay: 0.50s; }
.bar:nth-child(12) { transition-delay: 0.55s; }

/* --- Divider --- */

.divider {
  padding: 2rem 0;
}

.divider__line {
  height: 1px;
  background: linear-gradient(to right,
    transparent,
    var(--blue) 20%,
    var(--teal) 50%,
    var(--coral) 80%,
    transparent
  );
  opacity: 0.3;
}

/* --- Section headings --- */

.section__heading {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 2rem;
  color: var(--slate);
}

/* --- Projects --- */

.projects {
  padding: 6rem 0;
}

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

@media (min-width: 640px) {
  .project-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.project {
  display: block;
  padding: 1.5rem;
  border: 1px solid var(--faint);
  border-radius: 8px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
}

a.project:hover {
  border-color: var(--teal);
  box-shadow: 0 4px 20px hsla(175, 50%, 42%, 0.1);
  transform: translateY(-2px);
}

.project__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.project__name {
  font-size: 1rem;
  font-weight: 600;
  font-family: 'SF Mono', 'Fira Code', 'JetBrains Mono', ui-monospace, monospace;
  color: var(--blue);
}

.project__arrow {
  font-size: 1.2rem;
  color: var(--muted);
  transition: transform 0.3s ease, color 0.3s ease;
}

a.project:hover .project__arrow {
  transform: translateX(4px);
  color: var(--teal);
}

.project__desc {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.55;
  margin-bottom: 0.75rem;
}

.project__tags {
  display: flex;
  gap: 0.5rem;
}

.tag {
  font-size: 0.68rem;
  font-family: 'SF Mono', 'Fira Code', 'JetBrains Mono', ui-monospace, monospace;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-weight: 500;
}

.tag--teal {
  background: hsla(175, 50%, 42%, 0.12);
  color: var(--teal);
}

.tag--blue {
  background: hsla(210, 65%, 55%, 0.12);
  color: var(--blue);
}

.tag--coral {
  background: hsla(8, 70%, 62%, 0.12);
  color: var(--coral);
}

.tag--amber {
  background: hsla(36, 80%, 55%, 0.12);
  color: var(--amber);
}

/* --- Contact / footer --- */

.contact {
  padding: 6rem 0 8rem;
}

.contact__links {
  display: flex;
  gap: 2.5rem;
}

.contact__link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--slate);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.contact__link:hover {
  color: var(--blue);
}

.icon {
  width: 20px;
  height: 20px;
}

/* --- Selection color --- */

::selection {
  background: var(--blue);
  color: #fff;
}

/* --- Reduced motion --- */

@media (prefers-reduced-motion: reduce) {
  [data-scroll] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .bar {
    height: var(--height) !important;
    transition: none;
  }

  html {
    scroll-behavior: auto;
  }
}

/* --- Dark mode --- */

@media (prefers-color-scheme: dark) {
  :root {
    --bg:     #0e0e0d;
    --fg:     #e8e8e4;
    --muted:  #888;
    --faint:  #252523;
    --slate:  #c0c0bb;

    --blue:   hsl(210, 60%, 62%);
    --teal:   hsl(175, 45%, 50%);
    --coral:  hsl(8, 65%, 65%);
    --amber:  hsl(36, 75%, 60%);
    --violet: hsl(260, 40%, 65%);
  }

  body {
    background: var(--bg);
    color: var(--fg);
  }

  .dots-canvas { opacity: 0.3; }

  .divider__line { opacity: 0.2; }

  a.project:hover {
    box-shadow: 0 4px 20px hsla(175, 50%, 42%, 0.15);
  }

  .tag--teal {
    background: hsla(175, 45%, 50%, 0.15);
  }

  .tag--blue {
    background: hsla(210, 60%, 62%, 0.15);
  }

  ::selection {
    background: var(--teal);
    color: #0e0e0d;
  }
}