/* ============================================
   Alexander Escalera — Portfolio
   Design tokens
   ============================================ */
:root {
  --bg: #F3F3F3;
  --bg-raised: #F6F9FB;
  --ink: #15181B;
  --ink-soft: #4A4E4F;
  --muted: #757F87;
  --line: #D3DCE2;
  --line-strong: #B2BFC7;
  --accent: #33526E;       /* steel blue — data / analytics */
  --accent-soft: #D9E4EC;
  --tag: #AD7D14;          /* marigold / goldenrod — sticky-note callback */
  --tag-soft: #F7ECCF;
  --radius: 2px;

  --font-display: 'Manrope', sans-serif;
  --font-body: 'Manrope', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --container: 1180px;
  --gutter: clamp(24px, 5vw, 64px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.wrap {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* ---------- Focus states ---------- */
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(241, 241, 236, 0.88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.logo {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}
.nav {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-soft);
  position: relative;
  padding-bottom: 2px;
}
.nav a::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}
.nav a:hover::after,
.nav a[aria-current="page"]::after { transform: scaleX(1); }
.nav a[aria-current="page"] { color: var(--ink); }

/* ---------- Hero ---------- */
.hero {
  padding: 96px 0 72px;
}
.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--tag);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.hero-eyebrow::before {
  content: '';
  width: 7px; height: 7px;
  background: var(--tag);
  border-radius: 50%;
  display: inline-block;
}
h1.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  max-width: 16ch;
}
.hero-sub {
  font-size: 1.15rem;
  color: var(--ink-soft);
  max-width: 46ch;
  margin: 0 0 32px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  background: var(--ink);
  color: var(--bg-raised);
  padding: 14px 22px;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  transition: background 0.2s ease, color 0.2s ease;
}
.btn:hover { background: transparent; color: var(--ink); }

/* ---------- Section heading ---------- */
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  padding: 64px 0 32px;
}
.section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin: 0;
  letter-spacing: -0.01em;
}
.section-index {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  white-space: nowrap;
}

/* ---------- Work grid / catalog entries ---------- */
.catalog {
  border-top: 1px solid var(--line);
}
.entry {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  padding: 56px 0;
  border-bottom: 1px solid var(--line);
  align-items: center;
}
.entry-media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  position: relative;
}
.entry-media img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: top;
  transition: transform 0.5s ease;
}
.entry:hover .entry-media img { transform: scale(1.035); }

.spec {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-bottom: 18px;
}
.spec span { color: var(--ink-soft); }
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}
.tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  background: var(--tag-soft);
  color: var(--tag);
  padding: 5px 10px;
  border-radius: var(--radius);
}
.entry h3 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}
.entry p {
  color: var(--ink-soft);
  margin: 0 0 22px;
  max-width: 44ch;
}
.entry-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 2px;
  display: inline-block;
}

@media (max-width: 780px) {
  .entry { grid-template-columns: 1fr; }
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 56px 0;
  margin-top: 40px;
}
.footer-grid {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  align-items: center;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.footer-note {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
}

/* ---------- Mobile nav ---------- */
.nav-toggle { display: none; }
@media (max-width: 700px) {
  .nav { display: none; }
  .nav-toggle {
    display: inline-flex;
    background: none;
    border: 1px solid var(--line-strong);
    padding: 8px 12px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
  }
  .nav.open {
    display: flex;
    position: absolute;
    top: 76px; left: 0; right: 0;
    background: var(--bg-raised);
    flex-direction: column;
    gap: 0;
    border-bottom: 1px solid var(--line);
  }
  .nav.open a {
    padding: 16px var(--gutter);
    border-bottom: 1px solid var(--line);
    width: 100%;
  }
}

/* ============================================
   Case study page
   ============================================ */
.cs-hero {
  padding: 64px 0 0;
}
.cs-kicker {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--tag);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}
.cs-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 4rem);
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  max-width: 20ch;
}
.cs-dek {
  font-size: 1.1rem;
  color: var(--ink-soft);
  max-width: 50ch;
  margin: 0 0 40px;
}
.cs-hero-image {
  border: 1px solid var(--line);
  aspect-ratio: 16/9;
  overflow: hidden;
  cursor: zoom-in;
  background: var(--bg-raised);
}
.cs-hero-image img { width: 100%; height: 100%; object-fit: contain; }

.cs-hero-image.fit-content {
  aspect-ratio: auto;
  border: none;
  background: none;
}
.cs-hero-image.fit-content img { height: auto; }

.specsheet {
  margin-top: 40px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(5, 1fr);
}
.specsheet div {
  padding: 20px var(--gutter) 20px 8px;
  border-right: 1px solid var(--line);
}
.specsheet div:last-child { border-right: none; }
.specsheet dt {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 8px;
}
.specsheet dd {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.4;
}
@media (max-width: 900px) {
  .specsheet { grid-template-columns: repeat(2, 1fr); }
  .specsheet div { border-bottom: 1px solid var(--line); padding: 16px; }
}

.cs-body {
  max-width: 760px;
  margin: 0 auto;
  padding: 64px 0;
}
.cs-body h2 {
  font-family: var(--font-display);
  font-size: 1.7rem;
  letter-spacing: -0.01em;
  margin: 56px 0 18px;
}
.cs-body h2:first-child { margin-top: 0; }
.cs-body h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  margin: 32px 0 12px;
}
.cs-body p { color: var(--ink-soft); margin: 0 0 18px; }
.cs-body ul, .cs-body ol { color: var(--ink-soft); padding-left: 20px; margin: 0 0 18px; }
.cs-body li { margin-bottom: 8px; }
.cs-body strong { color: var(--ink); }
.cs-body a { border-bottom: 1px solid var(--ink-soft); }

.callout {
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  padding: 20px 24px;
  margin: 0 0 18px;
  font-size: 0.95rem;
}
.callout strong { color: var(--accent); }

.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 24px;
  margin: 32px 0;
  padding: 28px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.stat-num {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--accent);
  letter-spacing: -0.01em;
}
.stat-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--muted);
  letter-spacing: 0.03em;
}

/* Expandable image gallery */
.gallery {
  display: grid;
  gap: 12px;
  margin: 28px 0 40px;
  max-width: 100vw;
}
.gallery.cols-1 { grid-template-columns: 1fr; }
.gallery.cols-2 { grid-template-columns: 1fr 1fr; }
.gallery.cols-3 { grid-template-columns: repeat(3, 1fr); }
.gallery figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--bg-raised);
  cursor: zoom-in;
  overflow: hidden;
  position: relative;
}
.gallery figure img { width: 100%; height: 100%; object-fit: contain; background: #fff; }
.gallery figure::after {
  content: '↗ Expand';
  position: absolute;
  bottom: 10px; right: 10px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  background: rgba(21,24,27,0.82);
  color: #fff;
  padding: 5px 9px;
  border-radius: var(--radius);
  opacity: 0;
  transition: opacity 0.2s ease;
}
.gallery figure:hover::after { opacity: 1; }
figcaption {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  padding: 8px 10px;
}
@media (max-width: 900px) {
  .gallery.cols-3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 700px) {
  .gallery.cols-2, .gallery.cols-3 { grid-template-columns: 1fr; }
}

/* Image placeholder — swap for a real <figure data-expand> + <img> later */
.img-placeholder {
  width: 100%;
  height: 100%;
  min-height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
  background: repeating-linear-gradient(45deg, var(--bg-raised), var(--bg-raised) 12px, var(--bg) 12px, var(--bg) 24px);
  border: 1px dashed var(--line-strong);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.gallery .img-placeholder { aspect-ratio: 16/9; }

/* ---------- Expandable comparison table ---------- */
.table-expand {
  border: 1px solid var(--line);
  background: var(--bg-raised);
  margin: 28px 0 40px;
}
.table-expand summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--ink);
}
.table-expand summary::-webkit-details-marker { display: none; }
.table-expand summary::before {
  content: '+ Expand';
  color: var(--accent);
  flex-shrink: 0;
}
.table-expand[open] summary::before { content: '– Collapse'; }
.table-expand[open] summary { border-bottom: 1px solid var(--line); }
.table-scroll { overflow-x: auto; }
.cs-table {
  width: 100%;
  min-width: 900px;
  border-collapse: collapse;
  font-size: 0.85rem;
}
.cs-table th, .cs-table td {
  border: 1px solid var(--line);
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
}
.cs-table thead th {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  background: var(--bg);
  white-space: nowrap;
}
.cs-table tbody th {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--muted);
  background: var(--bg);
  white-space: nowrap;
  text-align: left;
}
.cs-table td { color: var(--ink-soft); }
.cs-table td p { margin: 0 0 6px; }
.cs-table td p:last-child { margin-bottom: 0; }
.cs-table td ul { margin: 0; padding-left: 16px; }
.cs-table td ul + p { margin-top: 6px; }
.cs-table td li { margin-bottom: 4px; }
.cs-table td li:last-child { margin-bottom: 0; }

.cs-nav {
  border-top: 1px solid var(--line);
  padding: 40px 0 64px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
}
.cs-nav a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
@media (max-width: 600px) {
  .cs-nav { flex-direction: column; gap: 16px; }
}

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(15, 17, 19, 0.94);
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 40px;
}
.lightbox.open { display: flex; }
.lightbox img {
  max-width: 100%;
  max-height: 88vh;
  object-fit: contain;
  background: #fff;
}
.lightbox-close {
  position: absolute;
  top: 24px; right: 24px;
  background: none;
  border: 1px solid rgba(255,255,255,0.4);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  padding: 8px 14px;
  cursor: pointer;
}
.lightbox-cap {
  position: absolute;
  bottom: 24px; left: 50%;
  transform: translateX(-50%);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  opacity: 0.7;
}

/* ============================================
   About page
   ============================================ */
.about-hero {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 56px;
  padding: 72px 0;
  align-items: start;
}
.about-photo {
  aspect-ratio: 4/5;
  overflow: hidden;
  border: 1px solid var(--line);
}
.about-photo img { width: 100%; height: 100%; object-fit: cover; }
.about-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4.5vw, 3rem);
  letter-spacing: -0.02em;
  margin: 0 0 18px;
}
.about-hero p { color: var(--ink-soft); margin: 0 0 16px; max-width: 56ch; }
@media (max-width: 780px) {
  .about-hero { grid-template-columns: 1fr; }
}

.timeline { border-top: 1px solid var(--line); }
.timeline-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 32px;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}
.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
}
.timeline-item h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin: 0 0 4px;
}
.timeline-item .role-loc {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--tag);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.timeline-item p { color: var(--ink-soft); margin: 0; max-width: 60ch; }
@media (max-width: 680px) {
  .timeline-item { grid-template-columns: 1fr; gap: 8px; }
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
  padding: 56px 0;
  border-top: 1px solid var(--line);
}
.skills-grid h4 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin: 0 0 14px;
}
.skills-grid ul { list-style: none; padding: 0; margin: 0; }
.skills-grid li {
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.92rem;
}

/* ---------- Password gate ---------- */
#gate {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
#gate.hidden { display: none; }
.gate-box {
  max-width: 380px;
  width: 100%;
  border: 1px solid var(--line-strong);
  background: var(--bg-raised);
  padding: 40px;
}
.gate-box .cs-kicker { margin-bottom: 10px; }
.gate-box h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin: 0 0 10px;
}
.gate-box p { color: var(--ink-soft); font-size: 0.9rem; margin: 0 0 20px; }
.gate-box input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  margin-bottom: 14px;
  background: #fff;
}
.gate-box button {
  width: 100%;
  border: none;
  cursor: pointer;
}
.gate-error {
  color: #A5433A;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  margin: -6px 0 14px;
  min-height: 1em;
}