/* ============================================================
   data542.com — styles.css
   ============================================================ */

/* ── TOKENS ── */
:root {
  --bg:           #0e0c20;
  --bg2:          #141230;
  --bg3:          #1c1840;
  --border:       #2e2660;
  --border-hover: #5a4aaa;
  --amber:        #FFB347;
  --coral:        #FF6B35;
  --gold:         #FFD166;
  --text:         #e8e0f0;
  --muted:        #9b92c0;
  --accent-glow:  rgba(255, 179, 71, 0.13);
  --radius:       10px;
  --font:         'Georgia', 'Times New Roman', serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.75;
  min-height: 100vh;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

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

a:hover {
  color: var(--gold);
  text-decoration: underline;
}

/* ── LAYOUT ── */
.site-wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.75rem;
}

/* ── HEADER ── */
header {
  padding: 2.8rem 0 2rem;
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

/* Logo disk */
.logo-disk {
  flex-shrink: 0;
  width: 90px;
  height: 90px;
  border-radius: 50%;
  overflow: hidden;
  box-shadow:
    0 0 32px rgba(255, 140, 42, 0.30),
    0 0 8px  rgba(255, 179, 71, 0.18);
}

.logo-disk svg {
  width: 100%;
  height: 100%;
}

/* Wordmark */
.header-text h1 {
  font-size: clamp(1.8rem, 4.5vw, 2.6rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text);
  line-height: 1.15;
}

.amber { color: var(--amber); }

.tagline {
  margin-top: 0.3rem;
  color: var(--muted);
  font-size: 0.92rem;
  letter-spacing: 0.05em;
}

/* Nav links */
.header-links {
  display: flex;
  gap: 1.4rem;
  margin-top: 0.65rem;
  font-size: 0.85rem;
  letter-spacing: 0.07em;
}

.header-links a {
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  padding-bottom: 1px;
  transition: color 0.2s, border-color 0.2s;
}

.header-links a:hover {
  color: var(--amber);
  border-color: var(--amber);
  text-decoration: none;
}

/* ── INTRO ── */
.intro {
  padding: 2.2rem 0 1.2rem;
  max-width: 680px;
  color: var(--muted);
  font-size: 1rem;
}

/* ── SECTION LABEL ── */
.section-label {
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 1.4rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--border);
}

/* ── PROJECTS SECTION ── */
.projects {
  padding: 2rem 0 3.5rem;
}

/* DESKTOP GRID */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s, box-shadow 0.2s;
  position: relative;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--coral), var(--amber), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.project-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 6px 28px var(--accent-glow);
}

.project-card:hover::before {
  opacity: 1;
}

/* Project thumbnail */
.project-img-wrap {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg3);
  border-bottom: 1px solid var(--border);
}

.project-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.85;
  transition: opacity 0.25s, transform 0.3s;
}

.project-card:hover .project-img-wrap img {
  opacity: 1;
  transform: scale(1.03);
}

/* Card body */
.project-body {
  padding: 1.3rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.project-meta {
  font-size: 0.73rem;
  color: var(--coral);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.45rem;
}

.project-card h3 {
  font-size: 1.05rem;
  color: var(--gold);
  font-weight: 700;
  margin-bottom: 0.55rem;
  line-height: 1.3;
}

.project-card p {
  font-size: 0.9rem;
  color: var(--muted);
  flex: 1;
  margin-bottom: 1rem;
}

.project-link {
  font-size: 0.84rem;
  color: var(--amber);
  border-bottom: 1px solid var(--border);
  padding-bottom: 1px;
  align-self: flex-start;
  transition: color 0.2s, border-color 0.2s;
}

.project-link:hover {
  color: var(--gold);
  border-color: var(--amber);
  text-decoration: none;
}

/* ACCORDION (hidden on desktop) */
.projects-accordion {
  display: none;
}

details.project-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg2);
  margin-bottom: 0.75rem;
  overflow: hidden;
}

details.project-item[open] {
  border-color: var(--border-hover);
}

details.project-item summary {
  padding: 1rem 1.2rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--gold);
  font-size: 0.98rem;
  font-weight: 700;
  user-select: none;
  transition: background 0.15s;
}

details.project-item summary:hover {
  background: var(--bg3);
}

details.project-item summary::-webkit-details-marker {
  display: none;
}

.chevron {
  color: var(--amber);
  font-size: 0.72rem;
  transition: transform 0.2s;
  flex-shrink: 0;
  margin-left: 0.8rem;
}

details.project-item[open] .chevron {
  transform: rotate(180deg);
}

.project-detail-body {
  padding: 1rem 1.2rem 1.2rem;
  border-top: 1px solid var(--border);
}

.project-detail-body .project-meta {
  margin-bottom: 0.45rem;
}

.project-detail-body p {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 0.75rem;
}

.project-detail-body a {
  font-size: 0.84rem;
  color: var(--amber);
}

/* ACCORDION two-column wrapper for tablet */
.accordion-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 1.2rem;
}

/* ── FOOTER ── */
footer {
  border-top: 1px solid var(--border);
  padding: 1.6rem 0;
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.07em;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.8rem;
  align-items: center;
}

.footer-sep {
  color: var(--border-hover);
}

footer a {
  color: var(--muted);
}

footer a:hover {
  color: var(--amber);
}

/* ── RESPONSIVE ── */

/* Tablet portrait — switch to two-col accordion */
@media (max-width: 860px) {
  .projects-grid      { display: none; }
  .projects-accordion { display: block; }
}

/* Phone portrait — single col */
@media (max-width: 540px) {
  .accordion-cols {
    grid-template-columns: 1fr;
  }

  .logo-disk {
    width: 68px;
    height: 68px;
  }

  .header-inner {
    gap: 1rem;
  }

  .site-wrap {
    padding: 0 1.1rem;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }

  .footer-sep { display: none; }
}