/* ==========================================================================
   Design tokens
   ========================================================================== */
:root {
  --bg: #F7F8F6;
  --bg-raised: #FFFFFF;
  --ink: #14181C;
  --ink-soft: #4A5157;
  --line: #D8DCE0;
  --tag-bg: #EDEFF2;
  --blue: #2B5FA8;
  --blue-soft: #E7EEF7;
  --green: #3C8B6C;
  --green-soft: #E7F2ED;

  --font-display: 'Space Grotesk', 'Arial Narrow', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  --radius: 4px;
  --max-width: 1080px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

/* Slim swimlane strip — a quiet nod to kanban lanes, present on every page */
.lane-strip {
  height: 4px;
  display: flex;
}
.lane-strip span { flex: 1; }
.lane-strip span:nth-child(1) { background: var(--blue); }
.lane-strip span:nth-child(2) { background: var(--green); }
.lane-strip span:nth-child(3) { background: var(--ink); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !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;
}

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 0.5em 0;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
h3 { font-size: 1.25rem; }

p { margin: 0 0 1em 0; color: var(--ink-soft); }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   Eyebrow / tag labels — styled like ticket/status tags, not decoration
   ========================================================================== */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--tag-bg);
  color: var(--ink-soft);
  padding: 4px 10px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.tag--blue { background: var(--blue-soft); color: var(--blue); border-color: transparent; }
.tag--green { background: var(--green-soft); color: var(--green); border-color: transparent; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 12px;
  display: block;
}

/* ==========================================================================
   Nav
   ========================================================================== */
.site-header {
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(247, 248, 246, 0.92);
  backdrop-filter: blur(6px);
  z-index: 10;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.nav__logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--ink);
}

.nav__links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav__links a {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.nav__links a:hover,
.nav__links a[aria-current="page"] {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--blue);
  padding-bottom: 2px;
}

.nav__toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 8px 10px;
  font-family: var(--font-mono);
  cursor: pointer;
}

@media (max-width: 720px) {
  .nav__toggle { display: block; }
  .nav__links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-raised);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    gap: 0;
    padding: 8px 24px;
    display: none;
  }
  .nav__links.is-open { display: flex; }
  .nav__links li { border-bottom: 1px solid var(--line); }
  .nav__links li:last-child { border-bottom: none; }
  .nav__links a { display: block; padding: 14px 0; }
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  padding: 96px 0 64px;
  border-bottom: 1px solid var(--line);
}

@keyframes rise-in {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero__grid > div,
.cs-hero > .container > * {
  animation: rise-in 0.5s ease both;
}
.hero__grid > div:nth-child(2) { animation-delay: 0.08s; }

.hero__grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 48px;
  align-items: start;
}

@media (max-width: 800px) {
  .hero__grid { grid-template-columns: 1fr; }
}

.hero__photo {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 16px;
  border: 1px solid var(--line);
  margin-top: 20px;
  box-shadow: 0 6px 20px rgba(20, 24, 28, 0.08);
}

.hero__lede {
  font-size: 1.15rem;
  color: var(--ink-soft);
  max-width: 46ch;
}

.hero__ctas {
  display: flex;
  gap: 12px;
  margin-top: 28px;
  flex-wrap: wrap;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--ink);
  cursor: pointer;
  background: var(--ink);
  color: var(--bg);
  transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}

.btn:hover {
  text-decoration: none;
  opacity: 0.92;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(20, 24, 28, 0.18);
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
  box-shadow: none;
}

.btn--ghost:hover {
  box-shadow: 0 6px 16px rgba(20, 24, 28, 0.08);
  border-color: var(--ink);
}

/* ==========================================================================
   Story card — the signature component
   Styled like a real ticket: mono ID, status stripe, tag.
   Used for case study previews AND for literal user-story quotes.
   ========================================================================== */
.story-card {
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-left: 3px solid var(--blue);
  border-radius: var(--radius);
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

a.story-card,
a.story-card:hover {
  text-decoration: none;
  color: inherit;
}

.story-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(20, 24, 28, 0.06);
}

.story-card--done { border-left-color: var(--green); }

.story-card__id {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-soft);
}

.story-card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  margin: 0;
}

.story-card__body { margin: 0; font-size: 0.95rem; }

.story-card__tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 4px;
}

/* A literal "As a / I want / so that" quote block used decoratively in the hero */
.story-quote {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.9;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
}

.story-quote span { color: var(--blue); }

/* ==========================================================================
   Grids / sections
   ========================================================================== */
section { padding: 64px 0; border-bottom: 1px solid var(--line); }
section:last-of-type { border-bottom: none; }

.section__head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 700px) { .grid--2 { grid-template-columns: 1fr; } }

/* ==========================================================================
   Skills / certifications
   ========================================================================== */
.cert-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
}

.cert-card__badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--blue);
  background: var(--blue-soft);
  padding: 6px 8px;
  border-radius: var(--radius);
  white-space: nowrap;
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.skills-list li {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: var(--tag-bg);
  padding: 6px 12px;
  border-radius: var(--radius);
}

/* ==========================================================================
   Case study detail page
   ========================================================================== */
.cs-hero {
  padding: 56px 0 40px;
  border-bottom: 1px solid var(--line);
}

.cs-meta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.cs-block { padding: 48px 0; border-bottom: 1px solid var(--line); }
.cs-block:last-of-type { border-bottom: none; }

.cs-block__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
  display: block;
  margin-bottom: 12px;
}

.persona-card {
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}

.mockup-placeholder {
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: var(--tag-bg);
  padding: 48px 20px;
  text-align: center;
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.user-stories {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* ==========================================================================
   Footer / contact
   ========================================================================== */
.site-footer {
  padding: 48px 0;
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.85rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 520px;
}

.contact-form label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  margin-bottom: 6px;
  display: block;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-raised);
  color: var(--ink);
}

.contact-form textarea { resize: vertical; min-height: 120px; }

/* ==========================================================================
   Certificate thumbnails + lightbox
   ========================================================================== */
.cert-thumb {
  cursor: zoom-in;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.cert-thumb:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(20, 24, 28, 0.12);
}

.lightbox-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(20, 24, 28, 0.85);
  align-items: center;
  justify-content: center;
  padding: 32px;
  z-index: 100;
  cursor: zoom-out;
}

.lightbox-overlay.is-open { display: flex; }

.lightbox-overlay img {
  max-width: 90vw;
  max-height: 90vh;
  border-radius: 4px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}