/* ==========================================================================
   Alexander Phipps — Portfolio
   Design tokens live here as CSS variables so the whole site can be
   restyled by editing this one block.
   ========================================================================== */

:root {
  /* Color */
  --color-bg: #0d0f12;
  --color-bg-raised: #1a1d22;
  --color-border: #3a3f47;
  --color-text: #f2f0ea;
  --color-text-dim: #a7ada5;
  --color-accent: #7dd3c0;      /* node-active teal */
  --color-accent-warm: #e8a857; /* amber, used for dates/tags */
  --color-published: #5fbf6f;

  /* Type */
  --font-display: "Space Grotesk", "Arial", sans-serif;
  --font-body: "Inter", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "Courier New", monospace;

  /* Scale */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;

  --radius: 4px;
  --max-width: 920px;
}

/* ----- Reset ----- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; }

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

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--color-accent);
  color: var(--color-bg);
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0;
}

p { margin: 0 0 var(--space-2) 0; }
p:last-child { margin-bottom: 0; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

/* ----- Site header / nav ----- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(13, 15, 18, 0.88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-2) var(--space-3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.nav-mark {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  color: var(--color-text);
}

.nav-mark .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent);
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  gap: var(--space-3);
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.nav-links a {
  color: var(--color-text-dim);
  position: relative;
  padding: 0.25rem 0;
  transition: color 0.15s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible,
.nav-links a[aria-current="page"] {
  color: var(--color-accent);
}

.nav-links a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: var(--color-accent);
}

.nav-toggle {
  display: none;
}

/* ----- Circuit divider (signature element) ----- */
.circuit-divider {
  width: 100%;
  height: 28px;
  margin: var(--space-5) 0;
  display: block;
}

.circuit-divider line,
.circuit-divider path {
  stroke: var(--color-border);
  stroke-width: 1;
  fill: none;
}

.circuit-divider circle {
  fill: var(--color-bg);
  stroke: var(--color-accent);
  stroke-width: 1.5;
}

/* ----- Hero ----- */
.hero {
  padding: var(--space-6) 0 var(--space-5);
  position: relative;
  overflow: hidden;
}

.hero-graph {
  position: absolute;
  top: -40px;
  right: -60px;
  width: 360px;
  height: 360px;
  opacity: 0.5;
  pointer-events: none;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  letter-spacing: -0.01em;
  margin-bottom: var(--space-1);
  position: relative;
}

.hero .role {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-text-dim);
  margin-bottom: var(--space-3);
}

.hero .lede {
  max-width: 540px;
  color: var(--color-text-dim);
  font-size: 1.05rem;
  margin-bottom: var(--space-4);
}

.hero .lede strong {
  color: var(--color-text);
  font-weight: 600;
}

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 0.75rem 1.4rem;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius);
  color: var(--color-accent);
  transition: background 0.15s ease, color 0.15s ease;
}

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

.btn::after {
  content: "\2192";
  transition: transform 0.15s ease;
}

.btn:hover::after {
  transform: translateX(2px);
}

/* ----- Section headings ----- */
.section-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-accent-warm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-1);
}

main {
  padding-bottom: var(--space-6);
}

/* ----- Project / node cards ----- */
.project-grid {
  display: grid;
  gap: var(--space-3);
}

.project-grid { margin-bottom: var(--space-5); }

.project-card {
  display: block;
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.project-card:hover,
.project-card:focus-visible {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.project-card .tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-accent-warm);
  margin-bottom: var(--space-2);
}

.project-card .tag .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent-warm);
}

.project-card h3 {
  font-size: 1.4rem;
  margin-bottom: var(--space-1);
}

.project-card p {
  color: var(--color-text-dim);
  font-size: 0.95rem;
}

.project-card .role {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-text-dim);
  margin-top: var(--space-2);
}

.project-card .tag.is-published {
  color: var(--color-published);
}

.project-card .tag.is-published .dot {
  background: var(--color-published);
}

/* ----- Image placeholders (swap with real screenshots) ----- */
.media {
  background: var(--color-bg-raised);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-2);
  margin-bottom: var(--space-4);
  overflow: hidden;
}

.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius);
}

.media-placeholder-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-text-dim);
  line-height: 1.5;
}

.media-caption {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-text-dim);
  text-align: center;
  margin-bottom: var(--space-4);
}

/* ----- Prose blocks within project detail ----- */
.prose {
  max-width: 680px;
}

.prose h2 {
  font-size: 1.5rem;
  margin-top: var(--space-5);
  margin-bottom: var(--space-2);
}

.prose h2:first-child {
  margin-top: 0;
}

.prose p {
  color: var(--color-text-dim);
  margin-bottom: var(--space-2);
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-text-dim);
  margin: var(--space-2) 0 var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.meta-row span strong {
  display: block;
  color: var(--color-text);
  font-weight: 600;
  margin-bottom: 0.2rem;
}

.external-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--color-accent);
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 1px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

/* ----- About page ----- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.about-photo .media {
  aspect-ratio: 1 / 1;
  max-width: 320px;
}

.skills-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: var(--space-2);
}

.skills-list li {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-text-dim);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.3rem 0.8rem;
}

.contact-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.contact-list li {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-2);
}

.contact-list a {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--color-text);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  transition: color 0.15s ease;
}

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

.contact-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-accent-warm);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.3rem;
}

/* ----- Footer ----- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-4) 0;
}

.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-dim);
}

.site-footer a {
  color: var(--color-text-dim);
  transition: color 0.15s ease;
}

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

.back-to-top {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

/* ----- Responsive ----- */
@media (min-width: 640px) {
  .project-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 760px) {
  .about-grid {
    grid-template-columns: 320px 1fr;
  }
}

@media (max-width: 640px) {
  .nav-links {
    gap: var(--space-2);
    font-size: 0.78rem;
  }
  .hero-graph {
    display: none;
  }
}