/* ==========================================================================
   Tadiwanashe Mpupuni — portfolio
   Plain CSS. Design tokens via custom properties. Light default, dark toggle.
   ========================================================================== */

/* ---------- Tokens ---------- */
:root {
  /* type */
  --font-sans: "Geist", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "Geist Mono", ui-monospace, "Cascadia Code", Consolas, monospace;

  /* neutral base — zinc */
  --bg: #fafafa;
  --bg-raised: #ffffff;
  --bg-sunken: #f4f4f5;
  --ink: #18181b;
  --ink-2: #52525b;
  --ink-3: #a1a1aa;
  --line: #e4e4e7;
  --line-strong: #d4d4d8;

  /* single accent — emerald */
  --accent: #059669;
  --accent-strong: #047857;
  --accent-soft: rgba(5, 150, 105, 0.1);
  --accent-line: rgba(5, 150, 105, 0.35);

  /* terminal panel keeps a dark surface in both themes */
  --term-bg: #101012;
  --term-ink: #d4d4d8;
  --term-line: rgba(255, 255, 255, 0.08);

  /* motion */
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);

  /* rhythm */
  --section-pad: 6rem;
  --container: 1200px;
  --radius: 14px;
  --radius-lg: 20px;

  color-scheme: light;
}

[data-theme="dark"] {
  --bg: #09090b;
  --bg-raised: #111113;
  --bg-sunken: #0d0d0f;
  --ink: #f4f4f5;
  --ink-2: #a1a1aa;
  --ink-3: #71717a;
  --line: #232326;
  --line-strong: #303034;

  --accent: #10b981;
  --accent-strong: #34d399;
  --accent-soft: rgba(16, 185, 129, 0.12);
  --accent-line: rgba(16, 185, 129, 0.4);

  --term-bg: #0d0d0f;

  color-scheme: dark;
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
  transition: background-color 250ms var(--ease-out), color 250ms var(--ease-out);
}

img { max-width: 100%; display: block; }
ul { list-style: none; }
a { color: inherit; }

/* the hidden attribute must always win over component display rules */
[hidden] { display: none !important; }

.mono {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.01em;
}

.muted { color: var(--ink-2); }
.accent { color: var(--accent); }

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

/* focus — visible, accent-tinted */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 100;
  background: var(--ink);
  color: var(--bg);
  padding: 0.5rem 1rem;
  border-radius: 0 0 8px 8px;
  text-decoration: none;
  font-size: 0.875rem;
}
.skip-link:focus { top: 0; }

/* ---------- Typography ---------- */
h1, h2, h3 { letter-spacing: -0.03em; line-height: 1.08; font-weight: 600; }

h1 { font-size: clamp(2.25rem, 5.5vw, 3.75rem); }
h2 { font-size: clamp(1.625rem, 3.5vw, 2.375rem); }
h3 { font-size: 1.1875rem; letter-spacing: -0.015em; }

p { max-width: 65ch; }

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.6875rem;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

/* ---------- Nav ---------- */
.site-header {
  position: fixed;
  top: 1.25rem;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  justify-content: center;
  padding-inline: 1rem;
  pointer-events: none;
}

.nav-pill {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 1.75rem;
  padding: 0.5rem 0.625rem 0.5rem 1.125rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--bg-raised) 78%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--line);
  box-shadow: 0 8px 24px -16px rgba(0, 0, 0, 0.25);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  text-decoration: none;
  font-weight: 500;
}
.nav-logo .mono { font-size: 0.9375rem; }
.nav-logo-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}
.nav-links a {
  text-decoration: none;
  font-size: 0.875rem;
  color: var(--ink-2);
  transition: color 150ms var(--ease-out);
}
.nav-links a:hover { color: var(--ink); }

.nav-actions { display: flex; align-items: center; gap: 0.375rem; }

.theme-toggle, .menu-toggle {
  display: grid;
  place-items: center;
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--bg-raised);
  color: var(--ink-2);
  cursor: pointer;
  transition: transform 160ms var(--ease-out), color 150ms var(--ease-out), border-color 150ms var(--ease-out);
}
.theme-toggle:hover, .menu-toggle:hover { color: var(--ink); border-color: var(--line-strong); }
.theme-toggle:active, .menu-toggle:active { transform: scale(0.94); }

/* show the icon for the theme you can switch TO */
.icon-moon { display: block; }
.icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: block; }

/* hamburger — two lines that morph to an X */
.menu-toggle { display: none; position: relative; }
.menu-line {
  position: absolute;
  width: 14px; height: 1.5px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 250ms var(--ease-in-out);
}
.menu-line:nth-child(1) { transform: translateY(-3px); }
.menu-line:nth-child(2) { transform: translateY(3px); }
.menu-toggle[aria-expanded="true"] .menu-line:nth-child(1) { transform: rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-line:nth-child(2) { transform: rotate(-45deg); }

/* mobile menu overlay */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  place-content: center;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  opacity: 0;
  transition: opacity 250ms var(--ease-out);
}
.mobile-menu.open { opacity: 1; }

.mobile-menu-links { display: grid; gap: 1.5rem; text-align: left; }
.mobile-menu-links a {
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  text-decoration: none;
}
.mobile-menu-links li {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 350ms var(--ease-out), transform 350ms var(--ease-out);
  transition-delay: calc(var(--i) * 50ms);
}
.mobile-menu.open .mobile-menu-links li { opacity: 1; transform: translateY(0); }

/* ---------- Hero ---------- */
.hero {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding-top: 6.5rem;
  padding-bottom: 3rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 4rem;
  align-items: center;
  width: 100%;
}

.hero-sub {
  margin-top: 1.5rem;
  color: var(--ink-2);
  font-size: 1.0625rem;
}

.hero-ctas {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  margin-top: 2.25rem;
  flex-wrap: wrap;
}

.availability {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 2rem;
  color: var(--ink-2);
}

.pulse-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2.4s var(--ease-in-out) infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 var(--accent-soft); opacity: 1; }
  50% { box-shadow: 0 0 0 6px var(--accent-soft); opacity: 0.7; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.625rem 0.625rem 0.625rem 1.375rem;
  border-radius: 999px;
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
  transition: transform 160ms var(--ease-out), background-color 150ms var(--ease-out), border-color 150ms var(--ease-out);
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--ink);
  color: var(--bg);
}
.btn-primary:hover { background: color-mix(in srgb, var(--ink) 88%, var(--bg)); }

.btn-chip {
  display: grid;
  place-items: center;
  width: 26px; height: 26px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--bg) 16%, transparent);
  transition: transform 200ms var(--ease-out);
}
.btn:hover .btn-chip { transform: translate(2px, -2px); }

.btn-ghost {
  padding: 0.625rem 1.375rem;
  border-color: var(--line-strong);
  color: var(--ink);
  background: transparent;
}
.btn-ghost:hover { border-color: var(--ink-3); background: var(--bg-sunken); }

/* ---------- Hero panel: portrait + terminal (double-bezel) ---------- */
.bezel {
  padding: 6px;
  border-radius: var(--radius-lg);
  background: var(--bg-sunken);
  border: 1px solid var(--line);
}

.hero-panel { position: relative; }

.portrait {
  max-width: 300px;
  margin-left: auto;
  margin-right: 1.5rem;
}
.portrait img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: top;
  border-radius: calc(var(--radius-lg) - 6px);
}

.terminal-bezel {
  position: relative;
  max-width: 420px;
  margin-top: -4.5rem;
  box-shadow: 0 24px 48px -24px rgba(0, 0, 0, 0.35);
}

.terminal {
  border-radius: calc(var(--radius-lg) - 6px);
  background: var(--term-bg);
  border: 1px solid var(--term-line);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
  overflow: hidden;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0.625rem 0.875rem;
  border-bottom: 1px solid var(--term-line);
}
.terminal-bar span {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.14);
}
.terminal-bar code {
  margin-left: auto;
  color: rgba(255, 255, 255, 0.3);
  font-size: 0.6875rem;
}

.terminal-body {
  padding: 1.125rem 1.25rem 1.25rem;
  color: var(--term-ink);
  font-size: 0.8125rem;
  line-height: 1.85;
}
.terminal-body p { max-width: none; white-space: pre-wrap; }
.t-prompt { color: var(--accent); }
.t-out { color: rgba(212, 212, 216, 0.75); }
.t-key { color: rgba(255, 255, 255, 0.42); }
.t-ok { color: #34d399; }

.t-cursor {
  display: inline-block;
  width: 7px; height: 14px;
  background: var(--accent);
  vertical-align: text-bottom;
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ---------- Sections ---------- */
.section { padding-block: var(--section-pad); }

.section-head { margin-bottom: 3.5rem; }
.section-head h2 .muted { color: var(--ink-3); }

/* ---------- Bento grid ---------- */
.bento {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.25rem;
}

.card {
  grid-column: span 4;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--bg-raised);
  overflow: hidden;
  transition: border-color 200ms var(--ease-out), transform 200ms var(--ease-out);
}
.card:hover { border-color: var(--accent-line); }

.card-flagship { grid-column: span 8; grid-row: span 2; }
.card-wide { grid-column: span 8; }

.card-body {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.75rem;
  flex: 1;
}

.card-kicker {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.6875rem;
}

.card-summary { color: var(--ink-2); font-size: 0.9375rem; }

.stack-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin-top: 0.25rem;
}
.stack-tags li {
  padding: 0.2rem 0.625rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.71875rem;
  color: var(--ink-2);
  background: var(--bg-sunken);
}

.card-outcome {
  color: var(--ink-2);
  font-size: 0.78125rem;
  border-top: 1px solid var(--line);
  padding-top: 0.875rem;
  margin-top: auto;
}

/* screenshot frame */
.frame {
  aspect-ratio: 16 / 9;
  background: var(--bg-sunken);
  border-bottom: 1px solid var(--line);
}
.frame img { width: 100%; height: 100%; object-fit: cover; }
/* once a real screenshot is in the frame, the placeholder steps aside */
.frame img ~ .frame-placeholder { display: none; }
.frame-placeholder {
  height: 100%;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 0.75rem;
  color: var(--ink-3);
  background-image: radial-gradient(var(--line) 1px, transparent 1px);
  background-size: 22px 22px;
}
.frame-placeholder span { font-size: 0.71875rem; }

/* expandable detail */
.card-expand {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  align-self: flex-start;
  background: none;
  border: none;
  padding: 0.25rem 0;
  font-family: var(--font-mono);
  font-size: 0.78125rem;
  color: var(--accent);
  cursor: pointer;
}
.card-expand svg { transition: transform 200ms var(--ease-out); }
.card-expand[aria-expanded="true"] svg { transform: rotate(180deg); }
.card-expand:active { transform: scale(0.97); }

.card-detail {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 300ms var(--ease-in-out);
}
.card-detail > * { overflow: hidden; min-height: 0; }
.card-detail.open { grid-template-rows: 1fr; }

.card-detail dl {
  display: grid;
  gap: 0.375rem;
  padding-top: 0.5rem;
}
.card-detail dt {
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.65625rem;
  margin-top: 0.5rem;
}
.card-detail dd { color: var(--ink-2); font-size: 0.875rem; }

.card-link {
  display: inline-block;
  margin-top: 0.875rem;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.78125rem;
}
.card-link:hover { text-decoration: underline; }

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 4fr 5fr 3fr;
  gap: 3rem;
  align-items: start;
}
.about-grid .section-head { margin-bottom: 0; }

.about-copy { display: grid; gap: 1.25rem; }
.about-copy p { color: var(--ink-2); }

.about-facts { display: grid; }
.fact {
  padding-block: 1rem;
  border-top: 1px solid var(--line);
}
.fact:last-child { border-bottom: 1px solid var(--line); }
.fact dt {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.65625rem;
  margin-bottom: 0.25rem;
}
.fact dd { font-size: 0.9375rem; }

/* ---------- Skills ---------- */
.skills-list { border-top: 1px solid var(--line); }

.skill-row {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 1.5rem;
  align-items: center;
  padding-block: 1.5rem;
  border-bottom: 1px solid var(--line);
}
.skill-row .stack-tags { justify-content: flex-end; margin: 0; }
.skill-group { font-size: 1.0625rem; font-weight: 500; }

/* ---------- Certifications ---------- */
.cert-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.75rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.cert-info p { font-size: 0.9375rem; margin-top: 0.375rem; }

.cert-badge {
  flex-shrink: 0;
  padding: 0.5rem 1rem;
  border: 1px solid var(--accent-line);
  border-radius: 999px;
  color: var(--accent);
  background: var(--accent-soft);
  font-size: 0.8125rem;
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 6fr 5fr;
  gap: 4rem;
  align-items: start;
}

.contact-copy h2 { margin-bottom: 1rem; }

.contact-links {
  display: grid;
  margin-top: 2.5rem;
}
.contact-links li {
  display: flex;
  align-items: baseline;
  gap: 1.25rem;
  padding-block: 0.875rem;
  border-top: 1px solid var(--line);
}
.contact-links li:last-child { border-bottom: 1px solid var(--line); }
.contact-label {
  width: 5.5rem;
  flex-shrink: 0;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.65625rem;
}
.contact-links a {
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color 150ms var(--ease-out);
}
.contact-links a:hover { color: var(--accent); }

/* form */
.contact-form {
  display: grid;
  gap: 1.25rem;
  padding: 1.75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--bg-raised);
}

.field { display: grid; gap: 0.5rem; }

.field label { font-size: 0.875rem; font-weight: 500; }

.field input,
.field textarea {
  font-family: inherit;
  font-size: 0.9375rem;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 0.625rem 0.875rem;
  transition: border-color 150ms var(--ease-out);
  resize: vertical;
}
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.field.invalid input,
.field.invalid textarea { border-color: #dc2626; }
.field-error { color: #dc2626; font-size: 0.71875rem; }

.btn-submit { justify-self: start; }
.btn-submit[disabled] { opacity: 0.6; cursor: wait; }

.form-status { min-height: 1.25rem; font-size: 0.78125rem; }
.form-status.ok { color: var(--accent); }
.form-status.err { color: #dc2626; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding-block: 2rem;
  margin-top: 2rem;
}
.footer-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.footer-note { color: var(--ink-3); font-size: 0.71875rem; }
.footer-links { display: flex; gap: 1.25rem; }
.footer-links a {
  color: var(--ink-3);
  text-decoration: none;
  font-size: 0.71875rem;
  transition: color 150ms var(--ease-out);
}
.footer-links a:hover { color: var(--ink); }

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 600ms var(--ease-out), transform 600ms var(--ease-out);
  transition-delay: calc(var(--i, 0) * 60ms);
}
.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* no-JS fallback: everything visible */
.no-observer .reveal { opacity: 1; transform: none; }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .pulse-dot, .t-cursor { animation: none; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 3rem; }
  .hero-panel { max-width: 540px; }
  .portrait { margin-left: 0; margin-right: 0; max-width: 260px; }
  .terminal-bezel { margin-top: -3rem; margin-left: 3rem; max-width: 100%; }
  .about-grid { grid-template-columns: 1fr; gap: 2rem; }
  .contact-grid { grid-template-columns: 1fr; gap: 3rem; }
  .card, .card-flagship, .card-wide { grid-column: span 12; grid-row: auto; }
}

@media (max-width: 768px) {
  :root { --section-pad: 4.5rem; }

  .nav-links { display: none; }
  .menu-toggle { display: grid; }

  .hero { padding-top: 5.5rem; }

  .skill-row { grid-template-columns: 1fr; gap: 0.75rem; align-items: start; }
  .skill-row .stack-tags { justify-content: flex-start; }

  .cert-row { flex-direction: column; align-items: flex-start; gap: 1rem; }

  .footer-grid { flex-direction: column; align-items: flex-start; }
}

@media (hover: none), (pointer: coarse) {
  .btn:hover .btn-chip { transform: none; }
}