/* ==========================================================================
   Edward Mawela | profile site
   Palette pulled from the photos: very light beige base, navy suit,
   sky-blue shirt and tan-brown leather.
   ========================================================================== */

:root {
  --bg: #f4eee3;          /* very light beige */
  --bg-alt: #ebe2d2;      /* slightly deeper beige for alternating sections */
  --surface: #fbf8f2;     /* cards */
  --surface-hi: #fffdf9;  /* raised / hover */
  --ink: #16213a;         /* navy text */
  --ink-soft: #3a4257;
  --ink-muted: #5a5d68;
  --navy: #1c2e57;
  --navy-deep: #121c33;
  --sky: #a7c3e8;         /* shirt blue */
  --leather: #6b4a33;     /* shoes */
  --line: rgba(22, 33, 58, 0.12);
  --line-strong: rgba(22, 33, 58, 0.26);

  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --radius: 14px;
  --radius-lg: 22px;
  --shadow: 0 1px 2px rgba(18, 28, 51, 0.08), 0 12px 32px -12px rgba(18, 28, 51, 0.28);
  --max: 1160px;
  --gutter: clamp(16px, 4vw, 32px);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.12; margin: 0; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; }
code { font-family: var(--font-mono); font-size: 0.9em; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.mono { font-family: var(--font-mono); }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: 16px; top: -48px; z-index: 100;
  background: var(--navy); color: var(--surface-hi);
  padding: 10px 16px; border-radius: 8px; text-decoration: none;
}
.skip-link:focus { top: 12px; }

:focus-visible { outline: 3px solid var(--navy); outline-offset: 3px; border-radius: 4px; }

/* --------------------------------------------------------------------------
   Header / nav
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(244, 238, 227, 0.88);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}
.site-header.scrolled { border-bottom-color: var(--line); }

.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; }

.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-mark {
  display: inline-flex; align-items: center; gap: 7px;
  height: 38px; padding: 0 12px; border-radius: 10px;
  background: var(--navy); color: var(--surface-hi);
  font-family: var(--font-display); font-weight: 600; font-size: 15px; letter-spacing: 0.02em;
}
.brand-code { font-family: var(--font-mono); font-size: 12.5px; font-weight: 500; color: var(--sky); letter-spacing: 0; }
.brand-name { font-weight: 600; font-size: 15px; }

.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; }
.nav-links a {
  display: block; padding: 8px 14px; border-radius: 999px;
  text-decoration: none; font-size: 15px; font-weight: 500; color: var(--ink-soft);
  transition: background 0.15s ease, color 0.15s ease;
}
.nav-links a:hover,
.nav-links a.active { background: rgba(22, 33, 58, 0.08); color: var(--ink); }
.nav-links .nav-cta,
.nav-links .nav-cta.active { background: var(--navy); color: var(--surface-hi); margin-left: 8px; }
.nav-links .nav-cta:hover { background: var(--navy-deep); color: #fff; }

.nav-toggle {
  display: none; width: 44px; height: 44px; border: 0; border-radius: 10px;
  background: transparent; cursor: pointer; position: relative;
}
.nav-toggle-bar {
  position: absolute; left: 11px; right: 11px; height: 2px; background: var(--ink);
  border-radius: 2px; transition: transform 0.2s ease, top 0.2s ease;
}
.nav-toggle-bar:nth-of-type(2) { top: 18px; }
.nav-toggle-bar:nth-of-type(3) { top: 25px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-of-type(2) { top: 21px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-of-type(3) { top: 21px; transform: rotate(-45deg); }

/* --------------------------------------------------------------------------
   Buttons & links
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 12px 22px; border-radius: 999px;
  font-weight: 600; font-size: 15px; text-decoration: none;
  border: 1.5px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--navy); color: var(--surface-hi); }
.btn-primary:hover { background: var(--navy-deep); color: #fff; }
.btn-ghost { border-color: var(--line-strong); color: var(--ink); }
.btn-ghost:hover { border-color: var(--ink); background: rgba(22, 33, 58, 0.05); }

.text-link {
  font-weight: 600; font-size: 15px; color: var(--navy);
  text-decoration: underline; text-decoration-color: var(--line-strong); text-underline-offset: 4px;
}
.text-link:hover { text-decoration-color: var(--navy); }

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero { padding: clamp(40px, 7vw, 88px) 0 clamp(48px, 6vw, 72px); }

.hero-grid {
  display: grid; gap: clamp(32px, 5vw, 64px);
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  align-items: center;
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 6px 14px 6px 12px; border-radius: 999px;
  background: rgba(22, 33, 58, 0.07); border: 1px solid var(--line);
  font-size: 14px; font-weight: 500; color: var(--ink-soft); margin-bottom: 24px;
}
.dot { width: 8px; height: 8px; border-radius: 50%; background: #2f7a4a; box-shadow: 0 0 0 4px rgba(47, 122, 74, 0.18); }

.hero h1 { font-size: clamp(44px, 7.2vw, 88px); font-weight: 700; letter-spacing: -0.025em; }
.hero-role {
  display: block; margin-top: 10px;
  font-size: 0.42em; font-weight: 400; font-style: italic; color: var(--navy); letter-spacing: -0.01em;
}

.lede { font-size: clamp(17px, 1.6vw, 19px); color: var(--ink-soft); max-width: 36em; margin: 24px 0 24px; }

.cities { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin-bottom: 32px; }
.cities li {
  font-family: var(--font-mono); font-size: 13px;
  padding: 5px 12px; border-radius: 6px;
  background: var(--surface); border: 1px solid var(--line); color: var(--ink-soft);
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

.hero-photo { position: relative; margin: 0; }
.hero-photo picture,
.work-photo picture {
  display: block; border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow); background: var(--bg-alt);
}
.hero-photo img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; object-position: 50% 12%; }
.hero-photo::before {
  content: ""; position: absolute; inset: 18px -18px -18px 18px; z-index: -1;
  border: 1.5px solid var(--line-strong); border-radius: var(--radius-lg);
}
.photo-tag {
  position: absolute; left: 16px; bottom: 16px; right: 16px;
  display: flex; flex-direction: column; gap: 2px;
  padding: 12px 16px; border-radius: 12px;
  background: rgba(18, 28, 51, 0.82); color: var(--surface-hi);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  font-size: 14px; font-weight: 500;
}
.photo-tag .mono { font-size: 12px; color: var(--sky); }

.stats {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: clamp(48px, 6vw, 72px) 0 0;
  border-top: 1px solid var(--line-strong);
}
.stat { padding: 20px 20px 0 0; }
.stat + .stat { padding-left: 20px; border-left: 1px solid var(--line); }
.stat dt { font-size: 13px; color: var(--ink-muted); font-weight: 500; }
.stat dd { margin: 0 0 4px; font-family: var(--font-display); font-size: clamp(20px, 2.2vw, 26px); font-weight: 600; color: var(--ink); }
.stat { display: flex; flex-direction: column-reverse; justify-content: flex-end; }

/* --------------------------------------------------------------------------
   Sections
   -------------------------------------------------------------------------- */
.section { padding: clamp(64px, 9vw, 112px) 0; }
.section-alt { background: var(--bg-alt); }

.section-head { max-width: 760px; margin-bottom: clamp(36px, 5vw, 56px); }
.kicker { font-size: 13px; letter-spacing: 0.04em; color: var(--leather); margin-bottom: 14px; font-weight: 500; }
.section h2 { font-size: clamp(32px, 4.4vw, 52px); font-weight: 600; margin-bottom: 18px; }
.section-intro { font-size: 18px; color: var(--ink-soft); max-width: 42em; }

/* Approach */
.principles { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.principle {
  padding: 28px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--line);
  transition: transform 0.2s ease, background 0.2s ease;
}
.principle:hover { transform: translateY(-2px); background: var(--surface-hi); }
.principle-num { display: block; font-size: 13px; color: var(--leather); margin-bottom: 12px; }
.principle h3 { font-size: 24px; margin-bottom: 10px; }
.principle p { color: var(--ink-soft); margin: 0; font-size: 16px; }

.code-card {
  margin: 28px 0 0; border-radius: var(--radius);
  background: var(--navy-deep); color: #d9dfeb; overflow: hidden; box-shadow: var(--shadow);
}
.code-card-bar { display: flex; align-items: center; gap: 7px; padding: 12px 16px; background: rgba(255, 255, 255, 0.04); border-bottom: 1px solid rgba(255, 255, 255, 0.06); }
.code-card-bar span { width: 10px; height: 10px; border-radius: 50%; background: rgba(255, 255, 255, 0.18); }
.code-card-bar em { margin-left: 10px; font-style: normal; font-size: 12px; color: rgba(217, 223, 235, 0.6); }
.code-card pre { margin: 0; padding: 22px 24px; overflow-x: auto; font-size: 14px; line-height: 1.75; }
.code-card code { font-size: inherit; }
.code-card .k { color: #e6b98a; }
.code-card .f { color: var(--sky); }
.code-card .c { color: #7f8aa3; font-style: italic; }

/* CS50 */
.cs50-layout { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: clamp(32px, 5vw, 56px); align-items: start; }

.timeline { list-style: none; position: relative; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 8px; bottom: 8px; width: 2px; background: var(--line-strong); }
.timeline li { position: relative; padding: 0 0 32px 40px; }
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before {
  content: ""; position: absolute; left: 0; top: 6px; width: 16px; height: 16px;
  border-radius: 50%; background: var(--bg); border: 2px solid var(--navy);
}
.week { display: inline-block; font-size: 12px; color: var(--leather); margin-bottom: 4px; letter-spacing: 0.03em; }
.timeline h3 { font-size: 22px; margin-bottom: 8px; }
.timeline p { color: var(--ink-soft); font-size: 16px; margin-bottom: 8px; }
.timeline .psets {
  font-size: 12.5px; line-height: 1.6; color: var(--navy);
  padding: 8px 12px; border-radius: 8px; background: rgba(28, 46, 87, 0.08); display: inline-block; margin: 0;
}

.cs50-aside {
  position: sticky; top: 96px;
  padding: 28px; border-radius: var(--radius-lg);
  background: var(--navy); color: var(--surface-hi); box-shadow: var(--shadow);
}
.cs50-aside h3 { font-size: 24px; margin-bottom: 18px; color: #fff; }
.checklist { list-style: none; display: grid; gap: 14px; margin-bottom: 22px; }
.checklist li { position: relative; padding-left: 30px; font-size: 15.5px; line-height: 1.55; color: #e4e8f0; }
.checklist li::before {
  content: ""; position: absolute; left: 0; top: 3px; width: 18px; height: 18px; border-radius: 50%;
  background: var(--sky) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 8.5l2.5 2.5L12 5.5' fill='none' stroke='%23121c33' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 14px no-repeat;
}
.aside-note { font-size: 13px; color: rgba(228, 232, 240, 0.7); margin: 0; padding-top: 16px; border-top: 1px solid rgba(255, 255, 255, 0.12); }

/* Credentials */
.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.card {
  display: flex; flex-direction: column;
  padding: 28px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--line);
}
.card-org { font-size: 12.5px; color: var(--leather); margin-bottom: 10px; letter-spacing: 0.02em; }
.card h3 { font-size: 22px; margin-bottom: 12px; }
.card p { color: var(--ink-soft); font-size: 16px; }
.card .text-link { margin-top: auto; }

/* Work */
.work-grid { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); gap: clamp(32px, 6vw, 80px); align-items: center; }
.work-photo { margin: 0; }
.work-photo img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; object-position: 50% 15%; }

.big-number { display: flex; align-items: baseline; gap: 16px; margin: 8px 0 28px; padding: 20px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.big-number .num { font-family: var(--font-display); font-size: clamp(56px, 7vw, 80px); font-weight: 700; line-height: 1; color: var(--navy); }
.big-number .num-label { color: var(--ink-soft); font-size: 16px; max-width: 18em; }

.subhead { font-size: 20px; margin-bottom: 14px; }
.deliverables { list-style: none; display: grid; gap: 10px; margin-bottom: 32px; }
.deliverables li { position: relative; padding-left: 22px; color: var(--ink-soft); font-size: 16px; }
.deliverables li::before { content: ""; position: absolute; left: 0; top: 0.62em; width: 8px; height: 8px; border-radius: 2px; background: var(--leather); }
.deliverables strong { color: var(--ink); font-weight: 600; }

/* Skills (dark band) */
.section-dark { background: var(--navy-deep); color: #e4e8f0; }
.section-dark h2 { color: #fff; }
.section-dark .kicker { color: #d8b48f; }
.skill-groups { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px; }
.skill-group h3 { font-size: 19px; margin-bottom: 16px; color: #fff; }
.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.tags li {
  font-size: 14px; padding: 6px 12px; border-radius: 999px;
  background: rgba(167, 195, 232, 0.1); border: 1px solid rgba(167, 195, 232, 0.22); color: #dbe5f4;
}

/* Contact */
.contact { text-align: center; }
.contact-inner { max-width: 980px; }
.contact .section-intro { max-width: 760px; margin: 0 auto 36px; }
.contact-list { list-style: none; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-bottom: 32px; text-align: left; }
.contact-item {
  display: flex; flex-direction: column; gap: 4px; height: 100%;
  padding: 20px 22px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--line);
  text-decoration: none; transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}
.contact-item:hover { transform: translateY(-2px); border-color: var(--line-strong); background: var(--surface-hi); }
.contact-label { font-size: 12px; color: var(--leather); letter-spacing: 0.03em; }
.contact-value { font-weight: 600; font-size: 16px; color: var(--ink); overflow-wrap: break-word; }
.contact-actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.contact-more { margin: 24px 0 0; font-size: 15px; color: var(--ink-muted); }

/* Footer */
.site-footer { border-top: 1px solid var(--line-strong); padding: 28px 0; font-size: 14px; color: var(--ink-muted); }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; }
.footer-inner p { margin: 0; }
.footer-links { display: flex; flex-wrap: wrap; gap: 6px 20px; }
.footer-links a { color: var(--ink-soft); text-decoration: none; }
.footer-links a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }

/* --------------------------------------------------------------------------
   Reveal on scroll (only when JS has opted in)
   -------------------------------------------------------------------------- */
.js .reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.6s ease, transform 0.6s ease; }
.js .reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .js .reveal { opacity: 1; transform: none; }
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 1000px) {
  .skill-groups { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cards { grid-template-columns: 1fr; }
}

@media (max-width: 880px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    padding: 12px var(--gutter) 20px;
    background: var(--bg); border-bottom: 1px solid var(--line);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 14px; border-radius: 10px; }
  .nav-links .nav-cta { margin: 8px 0 0; text-align: center; }

  .hero-grid { grid-template-columns: 1fr; }
  .hero-photo { max-width: 460px; width: 100%; margin: 0 auto; }
  .hero-photo::before { inset: 12px -12px -12px 12px; }

  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat, .stat + .stat { padding: 18px 12px 18px 0; border-left: 0; border-bottom: 1px solid var(--line); }
  .stat:nth-child(even) { padding-left: 16px; border-left: 1px solid var(--line); }

  .principles { grid-template-columns: 1fr; }
  .contact-list { grid-template-columns: 1fr; }
  .cs50-layout { grid-template-columns: 1fr; }
  .cs50-aside { position: static; }
  .work-grid { grid-template-columns: 1fr; }
  .work-photo { max-width: 420px; }
}

@media (max-width: 520px) {
  body { font-size: 16px; }
  .brand-name { display: none; }
  .skill-groups { grid-template-columns: 1fr; }
  .hero-actions .btn,
  .contact-actions .btn { width: 100%; }
  .principle, .card { padding: 22px; }
  .hero-photo::before { inset: 10px -8px -10px 8px; }
  .code-card pre { font-size: 12.5px; padding: 18px; }
  .big-number { flex-direction: column; gap: 6px; }
}