/* Johnson Sun personal site. Light pages, navy blocks, yellow accents.
   Rule: yellow is never used for text on white. It sits on navy, or as a
   button fill with navy text. */

:root {
  --navy: #050a30;
  --navy-line: #1b2358;
  --navy-soft: #c9cde6;
  --yellow: #ffd230;
  --yellow-hover: #ffdf66;
  --cream: #fff7da;
  --white: #ffffff;
  --ink: #111318;
  --text: #2b2f3a;
  --muted: #5a6070;
  --line: #e6e3d9;

  --sans: "Inter", -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  /* Numbers and small labels use Inter too, with even-width digits. */
  --mono: "Inter", -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;

  --wrap: 1120px;
  --read: 720px;
  --radius: 12px;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--white);
  color: var(--text);
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.6;
}

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

a { color: var(--navy); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }

h1, h2, h3 { color: var(--ink); line-height: 1.2; margin: 0 0 16px; font-weight: 700; }
h1 { font-size: clamp(36px, 5vw, 56px); letter-spacing: -0.02em; }
h2 { font-size: clamp(26px, 3vw, 34px); letter-spacing: -0.01em; }
h3 { font-size: 21px; }
p { margin: 0 0 16px; }

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

.skip {
  position: absolute; left: -9999px; top: 8px;
  background: var(--yellow); color: var(--navy); padding: 8px 12px; z-index: 10;
}
.skip:focus { left: 8px; }

:focus-visible { outline: 3px solid var(--yellow); outline-offset: 2px; }
.section-white :focus-visible, .section-cream :focus-visible { outline-color: var(--navy); }

/* Header */
.site-header { background: var(--white); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.header-inner { display: flex; align-items: center; gap: 32px; min-height: 72px; }
.logo { font-weight: 700; font-size: 20px; color: var(--navy); text-decoration: none; letter-spacing: -0.01em; }
.site-nav { display: flex; gap: 28px; margin-left: auto; }
.site-nav a { color: var(--text); text-decoration: none; font-weight: 500; font-size: 16px; padding: 4px 0; border-bottom: 2px solid transparent; }
.site-nav a:hover { color: var(--navy); }
.site-nav a[aria-current="page"] { color: var(--navy); border-bottom-color: var(--navy); }

/* Buttons */
.btn {
  display: inline-block; font-family: var(--sans); font-weight: 600; font-size: 17px;
  padding: 14px 26px; border-radius: 999px; text-decoration: none; border: 2px solid transparent;
  transition: background 0.15s ease;
}
.btn-small { padding: 9px 18px; font-size: 15px; }
.btn-yellow { background: var(--yellow); color: var(--navy); }
.btn-yellow:hover { background: var(--yellow-hover); }
.btn-outline-light { color: var(--white); border-color: rgba(255, 255, 255, 0.6); }
.btn-outline-light:hover { border-color: var(--white); background: rgba(255, 255, 255, 0.08); }
.btn-navy { background: var(--navy); color: var(--white); }
.btn-navy:hover { background: #12195a; }
.btn-row { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }

/* Sections */
section { padding: 88px 0; }
.section-navy { background: var(--navy); color: var(--navy-soft); }
.section-navy h1, .section-navy h2, .section-navy h3 { color: var(--white); }
.section-navy a:not(.btn) { color: var(--white); }
.section-cream { background: var(--cream); }
.section-white { background: var(--white); }
.section-head { max-width: 720px; margin-bottom: 40px; }
.eyebrow { font-family: var(--mono); font-size: 14px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; }
.section-navy .eyebrow { color: var(--yellow); }
.lead { font-size: 21px; line-height: 1.55; }
.more-link { font-weight: 600; text-decoration: none; }
.more-link::after { content: " →"; }

/* Hero */
.hero { padding: 104px 0 112px; }
.hero h1 { max-width: 820px; color: var(--white); }
.hero .lead { max-width: 640px; color: var(--navy-soft); }
.mark { box-shadow: inset 0 -0.28em 0 var(--yellow); color: inherit; }
.section-navy .mark { box-shadow: none; color: var(--yellow); }

/* Cards */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; display: flex; flex-direction: column;
}
.card h3 { margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 17px; }
.card .more-link { margin-top: auto; }
a.card { text-decoration: none; color: inherit; transition: border-color 0.15s ease, transform 0.15s ease; }
a.card:hover { border-color: var(--navy); transform: translateY(-2px); }
.card-number {
  font-family: var(--mono); font-weight: 600; font-size: 17px; color: var(--navy);
  border-top: 1px solid var(--line); padding-top: 16px; margin-top: auto;
}
.card-number span { box-shadow: inset 0 -0.35em 0 var(--yellow); }

/* Numbers band */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.stat-number { font-variant-numeric: tabular-nums; letter-spacing: -0.02em; font-family: var(--mono); font-weight: 600; font-size: clamp(44px, 5vw, 60px); line-height: 1; color: var(--yellow); margin-bottom: 14px; }
.stat-label { font-size: 17px; color: var(--navy-soft); margin: 0; }

/* Testimonials */
.quote { background: var(--white); border-radius: var(--radius); padding: 32px; margin: 0; border: 1px solid var(--line); }
.quote p { font-size: 19px; color: var(--ink); }
.quote footer { font-size: 16px; color: var(--muted); margin-top: 20px; }
.quote footer strong { color: var(--ink); display: block; }

/* About teaser and CTA */
.split { display: grid; grid-template-columns: 1fr 1.4fr; gap: 48px; align-items: start; }
.cta { text-align: left; }
.cta h2 { max-width: 640px; }
.cta p { max-width: 560px; font-size: 19px; }

/* Page headers */
.page-head { padding: 80px 0 56px; background: var(--cream); }
.page-head .lead { max-width: 680px; color: var(--text); }
.crumb { font-size: 15px; margin-bottom: 20px; }
.crumb a { color: var(--muted); }

/* Services page */
.service { padding: 56px 0; border-top: 1px solid var(--line); }
.service:first-of-type { border-top: 0; padding-top: 0; }
.service-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: 48px; }
.service h2 { font-size: 30px; }
.label { font-family: var(--mono); font-size: 13px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); margin: 24px 0 8px; }
.label:first-child { margin-top: 0; }
.proof-links { display: flex; flex-wrap: wrap; gap: 10px; padding: 0; margin: 0; list-style: none; }
.proof-links a, .tag {
  display: inline-block; font-size: 15px; padding: 6px 14px; border-radius: 999px;
  background: var(--cream); color: var(--navy); text-decoration: none; border: 1px solid #f1e3a8;
}
.proof-links a:hover { border-color: var(--navy); }
.steps { counter-reset: step; list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.steps li { counter-increment: step; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.steps li::before { content: counter(step); font-family: var(--mono); font-weight: 600; font-size: 15px; color: var(--navy); background: var(--yellow); width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center; margin-bottom: 14px; }
.steps strong { color: var(--ink); display: block; margin-bottom: 4px; }
.steps span { font-size: 16px; color: var(--muted); }

/* Lists */
.list { padding-left: 22px; margin: 0 0 16px; }
.list li { margin-bottom: 8px; }
.results { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.results li { background: var(--cream); border-left: 4px solid var(--navy); border-radius: 0 8px 8px 0; padding: 14px 18px; }
.results strong { color: var(--navy); }

/* Project pages */
.project-body { padding: 64px 0 88px; }
.project-body h2 { margin-top: 56px; }
.project-body h2:first-child { margin-top: 0; }
.project-body h3 { margin-top: 32px; }
.app-block { border-top: 1px solid var(--line); padding-top: 48px; margin-top: 48px; }
.figure { margin: 24px 0 0; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; }
.figure img { margin: 0 auto; }
.figure-tall img { max-width: 400px; }
.figure figcaption { font-size: 15px; color: var(--muted); text-align: center; margin-top: 12px; }
.zoom-trigger { display: block; width: 100%; padding: 0; border: 0; background: none; cursor: zoom-in; border-radius: 8px; }
.zoom-trigger:hover img { opacity: 0.92; }

/* Diagram viewer */
.lb-open { overflow: hidden; }
.lightbox {
  width: 100vw; height: 100vh; max-width: none; max-height: none; margin: 0; padding: 0;
  border: 0; background: #f4f3ee; display: none; flex-direction: column;
}
.lightbox[open] { display: flex; }
.lightbox::backdrop { background: rgba(5, 10, 48, 0.6); }
.lb-bar {
  display: flex; align-items: center; gap: 8px; padding: 12px 16px;
  background: var(--navy); color: var(--white);
}
.lb-bar button {
  font-family: var(--sans); font-size: 16px; font-weight: 600; min-width: 44px; height: 40px;
  padding: 0 14px; border-radius: 999px; border: 1px solid var(--navy-line);
  background: #0e1650; color: var(--white); cursor: pointer;
}
.lb-bar button:hover { background: #1b2358; }
.lb-bar .lb-close { margin-left: auto; background: var(--yellow); color: var(--navy); border-color: var(--yellow); }
.lb-level { font-family: var(--mono); font-size: 15px; min-width: 56px; text-align: center; }
.lb-stage { flex: 1; overflow: auto; padding: 16px; cursor: grab; }
.lb-stage.dragging { cursor: grabbing; user-select: none; }
.lb-stage img { max-width: none; margin: 0 auto; background: var(--white); border-radius: 8px; box-shadow: 0 2px 16px rgba(5, 10, 48, 0.12); -webkit-user-drag: none; }

.placeholder { border: 2px dashed var(--line); border-radius: var(--radius); padding: 32px; text-align: center; color: var(--muted); }
.tags { display: flex; flex-wrap: wrap; gap: 10px; padding: 0; margin: 0; list-style: none; }
details.more { border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 20px; margin: 16px 0; }
details.more summary { cursor: pointer; font-weight: 600; color: var(--navy); }
details.more[open] summary { margin-bottom: 12px; }

/* Smaller projects */
.mini { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px 32px; }
.mini li { border-top: 1px solid var(--line); padding-top: 16px; font-size: 17px; }
.mini strong { color: var(--ink); display: block; }

/* About page */
.facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.photo-slot { aspect-ratio: 4 / 5; border-radius: var(--radius); background: var(--white); border: 2px dashed #e9d98f; display: grid; place-items: center; color: var(--muted); font-size: 15px; }

/* Contact page */
.contact-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; align-items: start; }
.contact-list { list-style: none; padding: 0; margin: 0 0 16px; }
.contact-list li { margin-bottom: 10px; }

/* Footer */
.site-footer { background: #03061f; color: var(--navy-soft); padding: 56px 0 32px; font-size: 16px; }
.site-footer a { color: var(--white); text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px; }
.footer-name { color: var(--white); font-weight: 700; font-size: 18px; margin-bottom: 6px; }
.footer-line { margin: 0; }
.footer-nav, .footer-contact { display: flex; flex-direction: column; gap: 8px; }
.footer-base { border-top: 1px solid var(--navy-line); margin-top: 40px; padding-top: 20px; font-size: 14px; }

/* Phones and tablets */
@media (max-width: 960px) {
  .grid-3, .grid-4, .stats, .steps { grid-template-columns: repeat(2, 1fr); }
  .split, .service-grid, .contact-grid { grid-template-columns: 1fr; gap: 24px; }
  .facts { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  body { font-size: 17px; }
  .wrap { padding: 0 16px; }
  section { padding: 64px 0; }
  .hero { padding: 72px 0 80px; }
  .header-inner { flex-wrap: wrap; gap: 8px 16px; padding-top: 12px; padding-bottom: 12px; }
  .site-nav { order: 3; width: 100%; margin-left: 0; gap: 20px; overflow-x: auto; }
  .header-cta { margin-left: auto; }
  .site-header { position: static; }
  .grid-2, .grid-3, .grid-4, .steps, .mini, .facts, .footer-inner { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; gap: 28px 20px; }
  .card, .quote { padding: 22px; }
  .figure-tall img { max-width: 100%; }
}