/* mdubya.info | professional aesthetic
   Inter sans body, JetBrains Mono for code only.
   Light + dark via [data-theme] attribute. Toggle in topbar.
*/

/* ====== design tokens ====== */
:root,
:root[data-theme="light"] {
  --bg:         #ffffff;
  --bg-soft:    #f6f7f9;
  --bg-card:    #ffffff;
  --rule:       #e6e8eb;
  --rule-soft:  #eff1f3;

  --fg:         #1a1d21;
  --fg-strong:  #0c0e10;
  --fg-dim:     #5b636b;
  --fg-faint:   #8b939b;

  --accent:     #0f766e;  /* teal-700 */
  --accent-bg:  #ecfdf5;  /* teal-50 */
  --accent-dim: #5b938e;

  --link:       #0f766e;
  --link-hov:   #134e4a;

  --shadow:     0 1px 2px rgba(15, 23, 42, 0.04), 0 1px 1px rgba(15, 23, 42, 0.03);
}

:root[data-theme="dark"] {
  --bg:         #0d1117;
  --bg-soft:    #161b22;
  --bg-card:    #11161d;
  --rule:       #232a33;
  --rule-soft:  #1c222b;

  --fg:         #d8dee4;
  --fg-strong:  #f0f3f6;
  --fg-dim:     #8b939b;
  --fg-faint:   #5b636b;

  --accent:     #2dd4bf;  /* teal-400 */
  --accent-bg:  #042f2e;
  --accent-dim: #3a8a7f;

  --link:       #5eead4;
  --link-hov:   #99f6e4;

  --shadow:     none;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

html { scroll-behavior: smooth; }

body {
  max-width: 880px;
  margin: 0 auto;
  padding: 28px 28px 64px;
}

a {
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.12s, border-color 0.12s;
}
a:hover {
  color: var(--link-hov);
  border-bottom-color: var(--link-hov);
}

code {
  font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--bg-soft);
  color: var(--fg);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 0.88em;
  border: 1px solid var(--rule);
}

h1, h2, h3 {
  font-weight: 600;
  line-height: 1.25;
  color: var(--fg-strong);
  letter-spacing: -0.01em;
}

h2 {
  font-size: 14px;
  margin: 56px 0 18px;
  color: var(--fg-dim);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
}

h3 {
  font-size: 17px;
  margin: 0 0 4px;
  color: var(--fg-strong);
  font-weight: 600;
}

h3 .meta {
  color: var(--fg-dim);
  font-weight: 400;
  margin-left: 10px;
  font-size: 14px;
}

p { margin: 10px 0; color: var(--fg); }

ul {
  padding-left: 20px;
  margin: 10px 0;
}
ul li { margin-bottom: 8px; color: var(--fg); }

strong { color: var(--fg-strong); font-weight: 600; }

/* ====== topbar (brand + nav + theme toggle) ====== */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 8px 0 28px;
}

.brand {
  font-weight: 700;
  font-size: 17px;
  color: var(--fg-strong);
  letter-spacing: -0.01em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 14px;
}
.nav a {
  color: var(--fg-dim);
  border-bottom: none;
}
.nav a:hover { color: var(--fg-strong); }

.theme-toggle {
  background: var(--bg-soft);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 6px 8px;
  cursor: pointer;
  color: var(--fg-dim);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  transition: background 0.12s, border-color 0.12s;
}
.theme-toggle:hover {
  background: var(--rule-soft);
  border-color: var(--fg-faint);
  color: var(--fg-strong);
}
/* show a sun in dark mode, moon in light mode (we move toward the other state) */
.theme-toggle-icon::before {
  content: '\263D';                       /* crescent moon */
  font-size: 14px;
  line-height: 1;
}
:root[data-theme="dark"] .theme-toggle-icon::before {
  content: '\2600';                       /* sun */
}

/* ====== hero ====== */
.hero {
  margin: 28px 0 24px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--rule);
}
.hero h1 {
  font-size: 44px;
  margin: 0 0 10px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--fg-strong);
}
.hero .tagline {
  color: var(--fg);
  font-size: 18px;
  margin: 0 0 14px;
}
/* ====== summary ====== */
.summary p { color: var(--fg); font-size: 16px; }

/* ====== projects ====== */
.projects { display: flex; flex-direction: column; gap: 18px; }

.project {
  background: var(--bg-card);
  border: 1px solid var(--rule);
  padding: 22px 24px;
  border-radius: 8px;
  box-shadow: var(--shadow);
  transition: border-color 0.12s, transform 0.12s;
}
.project:hover { border-color: var(--accent-dim); }
.project.muted {
  background: var(--bg-soft);
  border-color: var(--rule-soft);
}

.project > header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 4px;
}

.status-tag {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 2px 9px;
  border-radius: 12px;
  background: var(--bg-soft);
  color: var(--fg-dim);
  border: 1px solid var(--rule);
  white-space: nowrap;
  font-weight: 500;
}
.status-tag.live {
  color: var(--accent);
  border-color: var(--accent-dim);
  background: var(--accent-bg);
}

.project .when {
  color: var(--fg-dim);
  font-size: 14px;
  margin: 2px 0 12px;
}

.project ul { padding-left: 20px; margin: 12px 0; }
.project ul li { color: var(--fg); }

.project .tech {
  color: var(--fg-dim);
  font-size: 13px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--rule-soft);
}
.project .tech .k {
  color: var(--fg-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 11px;
  margin-right: 10px;
  font-weight: 600;
}

/* ====== infra ====== */
.infra ul {
  list-style: none;
  padding-left: 0;
}
.infra ul li {
  padding-left: 18px;
  position: relative;
}
.infra ul li::before {
  content: '';
  width: 5px;
  height: 5px;
  background: var(--fg-faint);
  border-radius: 50%;
  position: absolute;
  left: 0;
  top: 11px;
}

/* ====== contact ====== */
.contact dl {
  display: grid;
  grid-template-columns: 120px 1fr;
  row-gap: 10px;
  column-gap: 16px;
  margin: 0;
}
.contact dt {
  color: var(--fg-dim);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}
.contact dd {
  margin: 0;
  color: var(--fg);
}
.contact .placeholder {
  color: var(--fg-faint);
  font-style: italic;
}
.contact-note {
  color: var(--fg-dim);
  font-size: 14px;
  margin: 18px 0 0;
}

/* ====== footer ====== */
.footer {
  margin-top: 64px;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
  color: var(--fg-dim);
  font-size: 13px;
  text-align: center;
}

/* ====== small screens ====== */
@media (max-width: 640px) {
  body { padding: 20px 18px 48px; }
  .topbar { flex-wrap: wrap; gap: 12px; }
  .nav { flex-wrap: wrap; gap: 14px; font-size: 13px; }
  .hero h1 { font-size: 36px; }
  .hero .tagline { font-size: 16px; }
  .contact dl { grid-template-columns: 1fr; row-gap: 4px; }
  .contact dt { margin-top: 8px; }
  .project { padding: 18px 18px; }
}

/* ====== selection ====== */
::selection { background: var(--accent); color: #ffffff; }