/* ==========================================================
   Victor Mawira — Portfolio styles
   Dark-mode-first, light-mode via [data-theme="light"]
   Type scale: ratio 1.25 from 16px
   ========================================================== */

:root,
:root[data-theme="dark"] {
  --bg: #0B0F14;
  --surface: #121821;
  --border: #1E2733;
  --text: #E6EDF3;
  --muted: #8B949E;
  --accent: #3FB950;
  --accent-2: #58A6FF;
  --accent-contrast: #0B0F14; /* text on accent backgrounds */
  --focus: #58A6FF;
  --shadow: 0 1px 0 rgba(0, 0, 0, .3);
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #FFFFFF;
  --surface: #F6F8FA;
  --border: #D0D7DE;
  --text: #1F2328;
  --muted: #59636E;
  --accent: #1A7F37;     /* darker green keeps AA contrast on white */
  --accent-2: #0969DA;
  --accent-contrast: #FFFFFF;
  --focus: #0969DA;
  --shadow: 0 1px 0 rgba(31, 35, 40, .04);
  color-scheme: light;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.mono, code { font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 .5em; font-weight: 700; letter-spacing: -.01em; }
h1 { font-size: clamp(2rem, 5vw + .5rem, 2.441rem); }  /* 1.25^4 */
h2 { font-size: 1.953rem; }                             /* 1.25^3 */
h3 { font-size: 1.25rem; }                              /* 1.25^1 */
h4 { font-size: 1rem; }

p { margin: 0 0 1em; }
a { color: var(--accent-2); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
ul, ol { margin: 0; padding: 0; list-style: none; }

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: 4px;
}

.container { width: 100%; max-width: 1100px; margin: 0 auto; padding: 0 1.25rem; }
.muted { color: var(--muted); }
.accent { color: var(--accent); }

.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: 1rem; top: -4rem; z-index: 100;
  background: var(--accent); color: var(--accent-contrast);
  padding: .5rem 1rem; border-radius: 6px; font-weight: 600; text-decoration: none;
}
.skip-link:focus { top: 1rem; }

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; gap: 1rem; min-height: 3.75rem; }

.brand {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-weight: 700; color: var(--text); text-decoration: none; white-space: nowrap;
}
.brand-prompt { color: var(--accent); }

.primary-nav { flex: 1; min-width: 0; overflow-x: auto; scrollbar-width: none; }
.primary-nav::-webkit-scrollbar { display: none; }
.primary-nav ul { display: flex; gap: .25rem; justify-content: flex-end; }
.primary-nav a {
  display: block; padding: .5rem .75rem; border-radius: 6px;
  color: var(--muted); text-decoration: none; font-size: .9rem; font-weight: 500; white-space: nowrap;
}
.primary-nav a:hover { color: var(--text); background: var(--surface); }
.primary-nav a.is-current { color: var(--accent); }

.theme-toggle {
  display: inline-flex; align-items: center; gap: .5rem;
  background: var(--surface); color: var(--text);
  border: 1px solid var(--border); border-radius: 999px;
  padding: .4rem .8rem; font: inherit; font-size: .85rem; cursor: pointer;
}
.theme-toggle:hover { border-color: var(--accent); }
.theme-icon {
  width: .9rem; height: .9rem; border-radius: 50%;
  background: linear-gradient(90deg, var(--text) 50%, transparent 50%);
  border: 2px solid var(--text);
}
/* Toggle is useless without JS */
html.no-js .theme-toggle { display: none; }

/* ---------- Hero ---------- */
.hero { padding: 5rem 0 3.5rem; border-bottom: 1px solid var(--border); }
.hero-inner { display: flex; align-items: center; gap: 2.5rem; }
.avatar {
  flex: none; width: 10rem; height: 10rem; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--surface); border: 2px solid var(--accent);
  color: var(--accent); font: 700 2.441rem "JetBrains Mono", ui-monospace, monospace;
}
.avatar img { width: 100%; height: 100%; border-radius: 50%; object-fit: cover; }
.eyebrow { color: var(--accent); font-size: .85rem; margin: 0 0 .5rem; }
.eyebrow::before { content: "$ "; color: var(--muted); }
.tagline { font-size: 1.25rem; color: var(--muted); max-width: 42rem; margin-bottom: 1.75rem; }
.cta-row { display: flex; flex-wrap: wrap; gap: .75rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; padding: .65rem 1.2rem; border-radius: 8px;
  font: 600 .95rem/1.4 "Inter", system-ui, sans-serif; text-decoration: none;
  border: 1px solid transparent; cursor: pointer;
}
.btn-primary { background: var(--accent); color: var(--accent-contrast); }
.btn-primary:hover { filter: brightness(1.1); }
.btn-secondary { background: transparent; color: var(--text); border-color: var(--border); }
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }
.btn-small { padding: .25rem .7rem; font-size: .8rem; }

/* ---------- Sections ---------- */
.section { padding: 4rem 0; }
.section + .section { border-top: 1px solid var(--border); }
.section h2 { margin-bottom: 1.25rem; }
.hash { color: var(--accent); margin-right: .25rem; }
.lead { font-size: 1.125rem; }
#about .container { max-width: 52rem; }
.more { margin-top: 1.5rem; }

/* ---------- Tech stack ---------- */
.stack-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.5rem 2rem; margin-top: 1.5rem; }
.stack-group h3 { font-size: .85rem; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; margin-bottom: .6rem; }
.chips, .tags { display: flex; flex-wrap: wrap; gap: .5rem; }

.chip, .tags li {
  display: inline-block; padding: .2rem .65rem; border-radius: 6px;
  background: var(--surface); border: 1px solid var(--border);
  font: 500 .8rem/1.6 "JetBrains Mono", ui-monospace, monospace; color: var(--text);
}
/* Interactive only once JS has upgraded them */
.chip[role="button"], .tags li[role="button"] { cursor: pointer; }
.chip[role="button"]:hover, .tags li[role="button"]:hover { border-color: var(--accent); color: var(--accent); }
.chip.is-active, .tags li.is-active { border-color: var(--accent); color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, var(--surface)); }

/* ---------- Filters ---------- */
.filters { display: none; flex-wrap: wrap; gap: .5rem; margin-bottom: 1.5rem; }
html.js .filters { display: flex; }
.filter-btn {
  background: var(--surface); color: var(--text);
  border: 1px solid var(--border); border-radius: 999px;
  padding: .4rem 1rem; font: 500 .875rem "Inter", system-ui, sans-serif; cursor: pointer;
}
.filter-btn:hover { border-color: var(--accent); }
.filter-btn.is-active { background: var(--accent); border-color: var(--accent); color: var(--accent-contrast); }

.tag-status { margin: -.5rem 0 1.25rem; color: var(--muted); font-size: .9rem; }
.link-btn { background: none; border: 0; padding: 0 .25rem; margin-left: .5rem; color: var(--accent-2); font: inherit; text-decoration: underline; cursor: pointer; }
.empty { color: var(--muted); padding: 1rem 0; }

/* ---------- Cards ---------- */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 1.25rem 1.4rem; box-shadow: var(--shadow);
}
.card h3, .card h4 { margin-bottom: .4rem; }
.card p:last-child { margin-bottom: 0; }
.note { font-size: .875rem; color: var(--muted); border-left: 3px solid var(--accent); padding-left: .75rem; }
.meta { color: var(--muted); font-size: .8rem; margin-bottom: .6rem; }

.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 1.25rem; }
.project { display: flex; flex-direction: column; }
.project .tags { margin: auto 0 1rem; padding-top: .5rem; }
.project .tags li { font-size: .72rem; padding: .05rem .5rem; }
.card-link { font-weight: 600; text-decoration: none; }
.card-link:hover { text-decoration: underline; }
.project[hidden], .cert-group[hidden] { display: none; }

/* Optional lazy-loaded project screenshots */
.project .shot { width: 100%; height: auto; border-radius: 6px; border: 1px solid var(--border); margin-bottom: 1rem; }

/* ---------- Certifications ---------- */
.cert-group { margin-top: 2rem; }
.cert-group h3 { color: var(--accent); font-family: "JetBrains Mono", ui-monospace, monospace; font-size: 1.1rem; }
.cert-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1rem; }
.cert { padding: 1rem 1.2rem; }
.cert h4 { font-size: 1rem; }
.cert .meta { margin-bottom: 0; }
.cert-featured { grid-column: 1 / -1; border-color: var(--accent); }
.cert-featured .meta { margin-bottom: .6rem; }

/* ---------- Blog ---------- */
.blog-list { display: grid; gap: 1.25rem; }
.post h3 { font-size: 1.25rem; }
.post h3 a { color: var(--text); text-decoration: none; }
.post h3 a:hover { color: var(--accent-2); text-decoration: underline; }

/* ---------- Timeline ---------- */
.timeline { border-left: 2px solid var(--border); margin-left: .5rem; }
.timeline li { position: relative; padding: 0 0 2rem 1.75rem; }
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before {
  content: ""; position: absolute; left: -.5rem; top: .5rem;
  width: .75rem; height: .75rem; border-radius: 50%;
  background: var(--accent); border: 2px solid var(--bg);
}
.at { font-weight: 500; color: var(--muted); }

/* ---------- Contact ---------- */
.callout {
  border: 1px solid var(--accent); border-left-width: 4px; border-radius: 8px;
  background: color-mix(in srgb, var(--accent) 8%, var(--surface));
  padding: 1rem 1.25rem; margin-bottom: 1.75rem;
}
.contact-list { display: grid; gap: .9rem; }
.contact-list li { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; }
.contact-label { min-width: 5.5rem; color: var(--muted); font-size: .85rem; }
.copy-status { color: var(--accent); font-size: .85rem; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 2rem 0; color: var(--muted); font-size: .9rem; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem 1.5rem; }
.footer-inner p { margin: 0; }

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
  .header-inner { flex-wrap: wrap; padding-top: .5rem; padding-bottom: .5rem; }
  .primary-nav { order: 3; flex-basis: 100%; }
  .primary-nav ul { justify-content: flex-start; }
  .theme-toggle { margin-left: auto; }
  html { scroll-padding-top: 7rem; }
}
@media (max-width: 640px) {
  .hero { padding: 3rem 0 2.5rem; }
  .hero-inner { flex-direction: column; align-items: flex-start; gap: 1.5rem; }
  .avatar { width: 7.5rem; height: 7.5rem; font-size: 1.953rem; }
  .tagline { font-size: 1.125rem; }
  .section { padding: 3rem 0; }
  h2 { font-size: 1.563rem; }
  .card-grid { grid-template-columns: 1fr; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* ---------- Print ---------- */
@media print {
  .site-header, .filters, .theme-toggle, .skip-link { display: none !important; }
  body { background: #fff; color: #000; }
  .card { break-inside: avoid; }
}