/* =========================================================
   Mucheru Maina — Portfolio
   Terminal / monospace developer portfolio
   (styled after the john-green.dev aesthetic)
   ========================================================= */

:root {
  /* dark palette */
  --dark: #0d141d;
  --dark-2: #111a24;
  --dark-3: #16212e;
  --dark-border: #22303f;
  --dark-text: #e8edf2;
  --dark-dim: #93a1b0;
  --dark-mute: #64748b;

  /* light palette */
  --light: #f3f4f6;
  --light-2: #ffffff;
  --light-border: #e4e7eb;
  --light-text: #1c2530;
  --light-dim: #566374;
  --light-mute: #8a96a5;

  /* accent (green) */
  --accent: #34d399;
  --accent-bright: #4ade80;
  --accent-deep: #22c55e;
  --accent-soft: rgba(52, 211, 153, 0.14);

  --radius: 16px;
  --radius-sm: 10px;
  --maxw: 1120px;
  --font-mono: "JetBrains Mono", "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  margin: 0;
  background: var(--dark);
  color: var(--dark-text);
  font-family: var(--font-sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.mono { font-family: var(--font-mono); }
.accent { color: var(--accent-bright); }

h1, h2, h3, h4, .heading { font-family: var(--font-mono); font-weight: 700; letter-spacing: -0.5px; }

/* ---------- Section themes ---------- */
.section { padding: 110px 0; position: relative; }
.section-dark { background: var(--dark); color: var(--dark-text); }
.section-light { background: var(--light); color: var(--light-text); }

.eyebrow {
  font-family: var(--font-mono);
  color: var(--accent-deep);
  font-size: 0.9rem;
  font-weight: 500;
  text-align: center;
  display: block;
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(1.9rem, 4.5vw, 2.9rem);
  text-align: center;
  margin: 0 auto 18px;
  color: inherit;
}
.section-lead {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 60px;
  color: var(--light-dim);
  font-size: 1.05rem;
}
.section-dark .section-lead { color: var(--dark-dim); }

/* ---------- Navbar ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: 72px;
  display: flex;
  align-items: center;
  backdrop-filter: blur(12px);
  background: rgba(13, 20, 29, 0.72);
  border-bottom: 1px solid transparent;
  transition: background .3s, border-color .3s;
}
.nav.scrolled { background: rgba(13, 20, 29, 0.92); border-bottom-color: var(--dark-border); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.brand { font-family: var(--font-mono); font-weight: 700; font-size: 1.35rem; letter-spacing: 1px; }
.brand .g { color: var(--accent-bright); }
.nav-links { display: flex; align-items: center; gap: 34px; list-style: none; margin: 0; padding: 0; }
.nav-links a { font-family: var(--font-mono); font-size: 0.92rem; color: var(--dark-dim); transition: color .2s; }
.nav-links a:hover { color: var(--accent-bright); }

.nav-toggle { display: none; background: none; border: none; color: var(--accent-bright); cursor: pointer; width: 42px; height: 42px; padding: 9px; }
.nav-toggle span { display: block; height: 2px; background: currentColor; margin: 5px 0; border-radius: 2px; transition: transform .3s, opacity .3s; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 120px 0 80px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(600px circle at 50% 0%, rgba(52, 211, 153, 0.08), transparent 60%),
    radial-gradient(700px circle at 85% 30%, rgba(74, 222, 128, 0.05), transparent 55%);
  pointer-events: none;
}
.hero-code {
  position: absolute;
  left: 28px;
  top: 20%;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.9;
  color: rgba(147, 161, 176, 0.14);
  white-space: pre;
  pointer-events: none;
  user-select: none;
  display: none;
}
.hero-inner { position: relative; z-index: 2; width: 100%; max-width: 900px; padding: 0 24px; }

.whoami-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--dark-dim);
  border: 1px solid var(--dark-border);
  background: var(--dark-2);
  border-radius: 100px;
  padding: 8px 20px;
  margin-bottom: 34px;
}
.whoami-pill .prompt { color: var(--accent-bright); }

.hero h1 {
  font-size: clamp(2.8rem, 9vw, 5.6rem);
  line-height: 1.02;
  margin: 0;
  color: var(--dark-text);
}
.hero h1 .last { color: var(--accent-bright); }
.hero-role {
  font-family: var(--font-mono);
  font-size: clamp(1.1rem, 3vw, 1.7rem);
  color: var(--dark-dim);
  margin-top: 20px;
  letter-spacing: 2px;
}
.cursor {
  display: inline-block;
  width: 0.6em;
  height: 1.05em;
  background: var(--accent-bright);
  margin-left: 4px;
  transform: translateY(3px);
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero-bio {
  max-width: 640px;
  margin: 30px auto 0;
  color: var(--dark-dim);
  font-size: 1.08rem;
}

/* Terminal window */
.terminal {
  margin: 44px auto 0;
  max-width: 680px;
  background: #0a1017;
  border: 1px solid var(--dark-border);
  border-radius: 12px;
  box-shadow: 0 24px 60px -20px rgba(0, 0, 0, 0.7);
  overflow: hidden;
  text-align: left;
}
.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--dark-2);
  border-bottom: 1px solid var(--dark-border);
}
.terminal-bar .dot { width: 12px; height: 12px; border-radius: 50%; }
.terminal-bar .dot.r { background: #ff5f57; }
.terminal-bar .dot.y { background: #febc2e; }
.terminal-bar .dot.g { background: #28c840; }
.terminal-bar .title { font-family: var(--font-mono); font-size: 0.82rem; color: var(--dark-mute); margin-left: 10px; }
.terminal-body {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 20px;
  min-height: 150px;
  color: var(--dark-dim);
  line-height: 1.75;
}
.terminal-body .line { white-space: pre-wrap; word-break: break-word; }
.terminal-body .cmd { color: var(--dark-text); }
.terminal-body .out { color: var(--dark-dim); }
.terminal-body .ok { color: var(--accent-bright); }
.terminal-body .p { color: var(--accent-bright); margin-right: 8px; }
.terminal-chips { display: flex; flex-wrap: wrap; gap: 8px; padding: 0 20px 20px; }
.chip {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--dark-dim);
  background: var(--dark-3);
  border: 1px solid var(--dark-border);
  border-radius: 8px;
  padding: 6px 12px;
  cursor: pointer;
  transition: border-color .2s, color .2s;
}
.chip:hover { border-color: var(--accent); color: var(--accent-bright); }

/* Buttons */
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; margin-top: 42px; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 500;
  padding: 13px 26px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: transform .15s, box-shadow .2s, background .2s, border-color .2s;
  border: 1px solid transparent;
}
.btn-solid { background: var(--accent-deep); color: #04140c; border-color: var(--accent-deep); font-weight: 600; }
.btn-solid:hover { background: var(--accent-bright); box-shadow: 0 0 30px -6px var(--accent-soft); transform: translateY(-2px); }
.btn-outline-dark { background: var(--dark-2); color: var(--dark-text); border-color: var(--dark-border); }
.btn-outline-dark:hover { border-color: var(--accent); color: var(--accent-bright); transform: translateY(-2px); }
.btn-outline-light { background: transparent; color: var(--light-text); border-color: var(--light-border); }
.btn-outline-light:hover { border-color: var(--accent-deep); color: var(--accent-deep); transform: translateY(-2px); }

/* ---------- Social rail ---------- */
.social-rail { position: fixed; left: 28px; bottom: 0; z-index: 50; display: flex; flex-direction: column; align-items: center; gap: 18px; }
.social-rail::after { content: ""; width: 1px; height: 84px; background: var(--dark-border); margin-top: 6px; }
.social-rail a { color: var(--dark-mute); transition: color .2s, transform .2s; }
.social-rail a:hover { color: var(--accent-bright); transform: translateY(-3px); }

/* ---------- About / feature cards ---------- */
.about-bio { max-width: 760px; margin: 0 auto 60px; }
.about-bio p { color: var(--light-dim); font-size: 1.05rem; margin: 0 0 20px; text-align: left; }
.about-bio p:last-child { margin-bottom: 0; }
.about-bio strong { color: var(--light-text); font-weight: 600; }
.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; max-width: 940px; margin: 0 auto; }
.feature-card {
  background: var(--light-2);
  border: 1px solid var(--light-border);
  border-radius: var(--radius);
  padding: 26px;
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px -20px rgba(0,0,0,0.18); border-color: var(--accent); }
.feature-icon {
  width: 46px; height: 46px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-soft);
  color: var(--accent-deep);
  margin-bottom: 16px;
}
.feature-card.hot .feature-icon { background: var(--accent-deep); color: #fff; }
.feature-card h3 { font-size: 1.15rem; margin: 0 0 10px; color: var(--light-text); }
.feature-card p { margin: 0; color: var(--light-dim); font-size: 0.94rem; }

/* ---------- Zigzag timeline ---------- */
.timeline { position: relative; max-width: 960px; margin: 0 auto; }
.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 6px; bottom: 6px;
  width: 2px;
  transform: translateX(-50%);
  background: var(--light-border);
}
.tl-row { position: relative; display: flex; margin-bottom: 40px; }
.tl-row:last-child { margin-bottom: 0; }
.tl-row .tl-card { width: calc(50% - 40px); }
.tl-row.left { justify-content: flex-start; }
.tl-row.right { justify-content: flex-end; }
.tl-dot {
  position: absolute;
  left: 50%; top: 14px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent-deep);
  transform: translateX(-50%);
  box-shadow: 0 0 0 4px var(--light);
  z-index: 2;
}
.tl-card {
  background: var(--light-2);
  border: 1px solid var(--light-border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 10px 30px -22px rgba(0,0,0,0.25);
  transition: transform .2s, box-shadow .2s;
}
.tl-card:hover { transform: translateY(-3px); box-shadow: 0 18px 44px -22px rgba(0,0,0,0.28); }
.tl-date { display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-mono); font-size: 0.82rem; color: var(--light-mute); }
.tl-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-deep);
  background: var(--accent-soft);
  border-radius: 100px;
  padding: 2px 10px;
  margin-left: 8px;
}
.tl-card h3 { font-size: 1.18rem; margin: 12px 0 6px; color: var(--light-text); }
.tl-company { display: inline-flex; align-items: center; gap: 7px; color: var(--accent-deep); font-family: var(--font-mono); font-size: 0.9rem; font-weight: 500; }
.tl-card ul { list-style: none; margin: 16px 0 0; padding: 0; }
.tl-card li { position: relative; padding-left: 22px; color: var(--light-dim); font-size: 0.92rem; margin-bottom: 9px; }
.tl-card li::before { content: "▸"; position: absolute; left: 0; color: var(--accent-deep); }

/* ---------- Project cards ---------- */
.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; max-width: 1080px; margin: 0 auto; }
.project-card {
  background: var(--light-2);
  border: 1px solid var(--light-border);
  border-radius: var(--radius);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.project-card:hover { transform: translateY(-5px); box-shadow: 0 20px 46px -24px rgba(0,0,0,0.22); border-color: var(--accent); }
.project-icon { width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center; color: #fff; margin-bottom: 18px; }
.project-card h3 { font-size: 1.16rem; margin: 0 0 10px; color: var(--light-text); }
.project-card p { margin: 0 0 18px; color: var(--light-dim); font-size: 0.92rem; flex: 1; }
.project-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 16px; }
.ptag { font-family: var(--font-mono); font-size: 0.74rem; color: var(--light-dim); background: var(--light); border: 1px solid var(--light-border); border-radius: 7px; padding: 4px 10px; }
.project-links { display: flex; gap: 16px; }
.project-links a { font-family: var(--font-mono); font-size: 0.84rem; color: var(--light-mute); display: inline-flex; align-items: center; gap: 6px; transition: color .2s; }
.project-links a:hover { color: var(--accent-deep); }
.center-btn { display: flex; justify-content: center; margin-top: 46px; }

/* ---------- Credentials ---------- */
.cred-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; max-width: 960px; margin: 0 auto; align-items: start; }
.cred-card { background: var(--light-2); border: 1px solid var(--light-border); border-radius: var(--radius); padding: 26px; margin-bottom: 22px; }
.cred-card:last-child { margin-bottom: 0; }
.cred-card > h3 { display: flex; align-items: center; gap: 10px; font-size: 1.1rem; margin: 0 0 20px; color: var(--light-text); }
.cred-card > h3 svg { color: var(--accent-deep); }
.cred-item { display: flex; gap: 12px; align-items: flex-start; padding: 12px 0; border-bottom: 1px solid var(--light-border); }
.cred-item:last-child { border-bottom: none; padding-bottom: 0; }
.cred-item .badge-ic { width: 34px; height: 34px; border-radius: 9px; background: var(--accent-soft); color: var(--accent-deep); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.cred-item h4 { font-size: 0.98rem; margin: 0 0 2px; color: var(--light-text); }
.cred-item .sub { font-family: var(--font-sans); font-size: 0.85rem; color: var(--light-mute); }
.edu-line { position: relative; padding-left: 22px; margin-bottom: 20px; }
.edu-line:last-child { margin-bottom: 0; }
.edu-line::before { content: ""; position: absolute; left: 0; top: 6px; width: 11px; height: 11px; border-radius: 50%; background: var(--accent-deep); }
.edu-line h4 { font-size: 0.98rem; margin: 0 0 3px; color: var(--light-text); }
.edu-line .school { font-size: 0.88rem; color: var(--light-dim); }
.edu-line .yr { font-family: var(--font-mono); font-size: 0.78rem; color: var(--light-mute); margin-top: 2px; }
.badges-wrap { display: flex; flex-wrap: wrap; gap: 18px; justify-content: center; margin-top: 12px; }

/* ---------- Contact / chat ---------- */
.chat {
  max-width: 460px;
  margin: 0 auto;
  background: var(--dark-2);
  border: 1px solid var(--dark-border);
  border-radius: 18px;
  padding: 22px;
  text-align: left;
  box-shadow: 0 24px 60px -24px rgba(0,0,0,0.6);
}
.chat-head { display: flex; align-items: center; gap: 12px; padding-bottom: 16px; border-bottom: 1px solid var(--dark-border); margin-bottom: 18px; }
.chat-avatar { width: 44px; height: 44px; border-radius: 50%; background: var(--accent-soft); color: var(--accent-bright); display: flex; align-items: center; justify-content: center; }
.chat-head .name { font-family: var(--font-mono); font-weight: 700; color: var(--dark-text); font-size: 0.98rem; }
.chat-head .status { font-family: var(--font-mono); font-size: 0.78rem; color: var(--accent-bright); display: flex; align-items: center; gap: 6px; }
.chat-head .status::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--accent-bright); box-shadow: 0 0 8px var(--accent-bright); }
.bubble {
  background: var(--dark-3);
  border: 1px solid var(--dark-border);
  color: var(--dark-text);
  border-radius: 14px;
  padding: 11px 16px;
  margin-bottom: 10px;
  font-size: 0.94rem;
  max-width: 92%;
}
.bubble.me { background: var(--accent-soft); border-color: transparent; }
.chat-cta { margin-top: 18px; }
.chat-cta .btn { width: 100%; justify-content: center; }
.contact-social { display: flex; gap: 22px; justify-content: center; margin-top: 40px; }
.contact-social a { color: var(--dark-mute); transition: color .2s, transform .2s; }
.contact-social a:hover { color: var(--accent-bright); transform: translateY(-3px); }

/* ---------- Footer ---------- */
.footer { padding: 40px 0; background: var(--dark); border-top: 1px solid var(--dark-border); text-align: center; }
.footer p { font-family: var(--font-mono); font-size: 0.82rem; color: var(--dark-mute); margin: 0; }
.footer a { color: var(--dark-dim); }
.footer a:hover { color: var(--accent-bright); }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s cubic-bezier(.16,.84,.44,1), transform .7s cubic-bezier(.16,.84,.44,1); }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (min-width: 1100px) { .hero-code { display: block; } }

@media (max-width: 900px) {
  .feature-grid, .projects-grid, .cred-grid { grid-template-columns: 1fr; }
  .projects-grid { max-width: 480px; }
  .social-rail { display: none; }
  /* timeline collapses to single left column */
  .timeline::before { left: 7px; }
  .tl-dot { left: 7px; }
  .tl-row .tl-card { width: 100%; }
  .tl-row.left, .tl-row.right { justify-content: flex-start; padding-left: 34px; }
}

@media (max-width: 640px) {
  .section { padding: 80px 0; }
  .nav-links {
    position: fixed;
    inset: 72px 0 auto 0;
    flex-direction: column;
    background: rgba(13, 20, 29, 0.98);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--dark-border);
    padding: 26px 24px 32px;
    gap: 22px;
    transform: translateY(-130%);
    transition: transform .35s cubic-bezier(.16,.84,.44,1);
  }
  .nav-links.open { transform: translateY(0); }
  .nav-toggle { display: block; }
  .terminal { margin-left: -4px; margin-right: -4px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .cursor { animation: none; }
  * { animation-duration: .001ms !important; transition-duration: .05ms !important; }
}