/* ==========================================================================
   Meer Musabih — portfolio styles
   Identity kit: Space Grotesk (headings) + Inter (body) · #2563EB #111827
   #F9FAFB #14B8A6 · clean, modern, minimal — the work is the focus.
   Order: tokens → base → nav → hero → sections → about → experience
   → agents → projects → skills → edu/certs → contact → footer
   → reveal animation → responsive
   ========================================================================== */

/* ---------- tokens ---------- */
:root {
  --bg: #111827;                            /* kit dark */
  --bg-alt: #161e2e;                        /* alt sections (bg + subtle lift) */
  --line: rgba(249, 250, 251, 0.10);        /* hairlines from kit light */
  --line-strong: rgba(249, 250, 251, 0.22);
  --text: #F9FAFB;                          /* kit light */
  --muted: rgba(249, 250, 251, 0.62);
  --accent: #2563EB;                        /* kit blue — fills, borders, focus */
  --accent-2: #14B8A6;                      /* kit teal — small text accents */
  --font-display: "Space Grotesk", "Segoe UI", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  --font-mono: "IBM Plex Mono", Consolas, monospace;
  --nav-h: 62px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 20px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

h1, h2, h3, h4, p, ul, ol, dl, dd, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }

::selection { background: var(--accent); color: #fff; }

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

.container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 28px;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  clip: rect(0 0 0 0);
  overflow: hidden;
  border: 0;
}

/* ---------- nav ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  height: var(--nav-h);
  transition: background 0.25s ease, border-color 0.25s ease;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(17, 24, 39, 0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom-color: var(--line);
}

.nav-inner {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links { display: flex; gap: 22px; }
.nav-link {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.nav-link:hover { color: var(--text); }
.nav-link.active { color: var(--text); border-bottom-color: var(--accent); }

.nav-cta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text);
  white-space: nowrap;
}
.nav-cta span { display: inline-block; transition: transform 0.2s ease; }
.nav-cta:hover span { transform: translateX(4px); }
.nav-cta:hover { color: var(--accent-2); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 40px;
  height: 40px;
  padding: 11px 10px;
  background: none;
  border: 1px solid var(--line-strong);
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  height: 1.5px;
  width: 100%;
  background: var(--text);
  transition: transform 0.25s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(3.75px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { transform: translateY(-3.75px) rotate(-45deg); }

/* ---------- hero ---------- */
.hero {
  padding: calc(var(--nav-h) + 92px) 0 90px;
  border-bottom: 1px solid var(--line);
}

.hello {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 12px;
}

.hero-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(48px, 7.4vw, 88px);
  line-height: 1.02;
  letter-spacing: -0.02em;
}

.role-line {
  margin-top: 10px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(20px, 2.8vw, 29px);
  color: var(--accent-2);
}

.status {
  margin-top: 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.lede {
  margin-top: 20px;
  max-width: 560px;
  color: var(--muted);
  font-size: 17px;
}

.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 38px;
}

.btn {
  display: inline-block;
  padding: 11px 22px;
  font-size: 14.5px;
  font-weight: 500;
  transition: filter 0.2s ease, transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.btn-solid { background: var(--accent); color: #fff; }
.btn-solid:hover { filter: brightness(1.18); transform: translateY(-1px); }
.btn-outline { border: 1px solid var(--line-strong); }
.btn-outline:hover {
  border-color: var(--accent);
  background: rgba(37, 99, 235, 0.14);
  transform: translateY(-1px);
}

.hero-meta {
  display: inline-flex;
  gap: 18px;
  margin-left: 6px;
}
.hero-meta a {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 2px;
}
.hero-meta a:hover { color: var(--accent-2); border-color: var(--accent-2); }

/* run log — plain code block, no window chrome */
.runlog {
  margin-top: 64px;
  max-width: 720px;
}
.runlog figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 10px;
}
.runlog pre {
  margin: 0;
  padding: 24px 26px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--accent);
  background: rgba(249, 250, 251, 0.03);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

/* ---------- sections ---------- */
.section { padding: 96px 0; }
.section-alt {
  background: var(--bg-alt);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.sec-head {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding-top: 22px;
  border-top: 1px solid var(--line-strong);
  margin-bottom: 44px;
}
.sec-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent-2);
}
.sec-head h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 3.6vw, 34px);
  letter-spacing: -0.01em;
}

.tag {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 400;
  color: var(--muted);
  vertical-align: middle;
  margin-left: 10px;
  white-space: nowrap;
}

.tech {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--muted);
}

.note {
  margin-top: 26px;
  padding: 14px 18px;
  border-left: 2px solid var(--accent);
  background: rgba(37, 99, 235, 0.08);
  color: var(--muted);
  font-size: 14px;
  max-width: 680px;
}

.plain-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 14.5px;
}
.plain-list li::before {
  content: "\2013"; /* en dash */
  position: absolute;
  left: 0;
  color: var(--accent-2);
}

/* ---------- about ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 56px;
  align-items: start;
}

.prose p {
  color: var(--muted);
  margin-bottom: 18px;
  font-size: 16.5px;
}
.prose strong { color: var(--text); font-weight: 600; }

.facts div {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}
.facts dt { color: var(--muted); font-family: var(--font-mono); font-size: 12.5px; padding-top: 2px; }
.facts dd { color: var(--text); font-weight: 500; text-align: right; }

/* ---------- experience ---------- */
.xp-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 18px;
  flex-wrap: wrap;
}
.xp-head h3 { font-family: var(--font-display); font-weight: 700; font-size: 24px; }
.xp-role { font-weight: 400; font-style: italic; font-family: var(--font-body); color: var(--muted); }
.xp-note { font-family: var(--font-mono); font-size: 12.5px; color: var(--muted); }

.xp-summary {
  margin-top: 14px;
  max-width: 700px;
  color: var(--muted);
  font-size: 16px;
}

.capstone {
  margin-top: 36px;
  padding: 30px 32px;
  border: 1px solid var(--line);
  background: rgba(249, 250, 251, 0.02);
}
.capstone h4 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
}
.capstone .tag {
  border: 1px solid var(--line-strong);
  padding: 3px 10px;
  border-radius: 999px;
}

.rq {
  margin-top: 12px;
  font-style: italic;
  font-size: 16.5px;
  color: var(--muted);
  max-width: 620px;
}

.cap-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 44px;
  margin-top: 30px;
}
.cap-cols h5 {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin: 22px 0 12px;
}
.cap-cols h5:first-child { margin-top: 0; }

/* metrics table — reads like real experiment output */
.metrics {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 13.5px;
}
.metrics th {
  text-align: left;
  font-weight: 400;
  font-size: 12px;
  color: var(--muted);
  padding: 0 14px 9px 0;
  border-bottom: 1px solid var(--line-strong);
}
.metrics td {
  padding: 10px 14px 10px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}
.metrics th:not(:first-child),
.metrics td:not(:first-child) { text-align: right; padding-right: 0; }
.metrics tr.hl td { color: var(--text); }
.metrics td strong { color: var(--accent-2); font-size: 15px; }
.metrics tr.delta td {
  color: var(--accent-2);
  border-bottom: 0;
  font-size: 12.5px;
}

.signals {
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--muted);
}

.cap-output {
  margin-top: 28px;
  max-width: 660px;
  color: var(--text);
  font-size: 15.5px;
}

/* ---------- agents ---------- */
.agent-desc {
  margin-top: 14px;
  max-width: 680px;
  color: var(--muted);
  font-size: 16px;
}

.pipeline {
  counter-reset: step;
  display: flex;
  flex-wrap: wrap;
  row-gap: 12px;
  margin-top: 30px;
}
.pipeline li {
  counter-increment: step;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text);
}
.pipeline li::before {
  content: counter(step, decimal-leading-zero) " ";
  color: var(--accent-2);
}
.pipeline li:not(:last-child)::after {
  content: " \2192 "; /* arrow between steps */
  color: var(--muted);
  padding-right: 10px;
}

.run-note {
  margin-top: 30px;
  font-size: 15.5px;
  color: var(--muted);
}
.run-note strong {
  font-family: var(--font-mono);
  color: var(--text);
  font-weight: 500;
}

.agent .tech { margin-top: 14px; }
.agent .note { max-width: 620px; }

/* ---------- projects (list layout, not cards) ---------- */
.proj-list { border-top: 1px solid var(--line); }

.proj {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 26px;
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}
.proj-num {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--muted);
  padding-top: 5px;
}
.proj:hover .proj-num { color: var(--accent-2); }

.proj h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
}
.proj-sub {
  font-style: italic;
  font-weight: 400;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--muted);
  margin-left: 6px;
}
.proj-body > p:first-of-type {
  margin-top: 10px;
  max-width: 700px;
  color: var(--muted);
  font-size: 15px;
}
.metric-line {
  margin-top: 14px;
  font-size: 15px;
  color: var(--muted);
}
.metric-line strong {
  font-family: var(--font-mono);
  color: var(--accent-2);
  font-weight: 500;
  font-size: 16px;
}
.proj .tech { margin-top: 12px; }

/* per-project links (repos / demos) */
.proj-link {
  display: inline-block;
  margin: 14px 18px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent-2);
  border-bottom: 1px solid var(--accent-2);
  padding-bottom: 2px;
}
.proj-link:hover { color: var(--text); border-color: var(--text); }

/* github call-to-action under the project list */
.gh-note {
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--line-strong);
  font-style: italic;
  color: var(--muted);
  font-size: 15px;
}
.gh-note a {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 13.5px;
  color: var(--accent-2);
  border-bottom: 1px solid var(--accent-2);
  padding-bottom: 2px;
}
.gh-note a:hover { color: var(--text); border-color: var(--text); }

/* ---------- software projects ---------- */
.soft-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}
.soft-item h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
}
.soft-item p {
  color: var(--muted);
  font-size: 14px;
  margin-top: 8px;
}
.soft-item .tech { margin-top: 10px; }

/* ---------- skills ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 44px 64px;
}
.skill-group h3 {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-2);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 14px;
}
.skill-group p {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 2.05;
  color: var(--muted);
}

/* ---------- education & certifications ---------- */
.edu-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 56px;
  align-items: start;
}

.edu h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
}
.edu p { color: var(--muted); margin-top: 8px; font-size: 15px; }
.edu strong { color: var(--accent-2); font-family: var(--font-mono); font-weight: 500; }

.cert-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 20px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}
.cert-row:first-of-type { padding-top: 4px; }
.cert-org {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--muted);
  white-space: nowrap;
}
.cert-title { color: var(--text); font-size: 14.5px; font-weight: 500; text-align: right; }

/* ---------- contact ---------- */
.contact-lede {
  max-width: 560px;
  color: var(--muted);
  font-size: 16.5px;
  margin-bottom: 40px;
}

.contact-list { border-top: 1px solid var(--line-strong); }

.contact-row {
  display: grid;
  grid-template-columns: 110px 1fr auto;
  align-items: baseline;
  gap: 22px;
  padding: 19px 4px;
  border-bottom: 1px solid var(--line);
  transition: background 0.2s ease;
}
.contact-row:hover { background: rgba(249, 250, 251, 0.04); }
.cc-label {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--muted);
}
.cc-value {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 19px;
  min-width: 0;
  overflow-wrap: anywhere;
}
.contact-row:hover .cc-value { color: var(--accent-2); }
.cc-arrow {
  font-family: var(--font-mono);
  color: var(--muted);
  transition: transform 0.2s ease, color 0.2s ease;
}
.contact-row:hover .cc-arrow { transform: translatex(5px); color: var(--accent-2); }

.soon {
  margin-top: 48px;
  font-style: italic;
  font-size: 16px;
  color: var(--muted);
}

/* ---------- contact form ---------- */
.contact-form {
  margin-top: 56px;
  max-width: 620px;
}
.contact-form h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  margin-bottom: 22px;
}
.form-field { margin-bottom: 18px; }
.form-field label {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}
.form-field input,
.form-field textarea {
  width: 100%;
  padding: 12px 14px;
  background: rgba(249, 250, 251, 0.04);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  transition: border-color 0.2s ease;
}
.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.form-field textarea { resize: vertical; min-height: 120px; }
.form-status { margin-top: 16px; font-size: 14.5px; min-height: 22px; }
.form-status.ok { color: var(--accent-2); }
.form-status.err { color: var(--text); }

/* ---------- footer ---------- */
.footer {
  border-top: 1px solid var(--line);
  padding: 34px 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.foot-name { font-family: var(--font-display); font-weight: 700; font-size: 16px; }
.foot-tag { font-family: var(--font-mono); font-size: 12px; color: var(--muted); margin-top: 3px; }
.foot-links { display: flex; gap: 20px; }
.foot-links a {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
}
.foot-links a:hover { color: var(--accent-2); }
.copyright { font-family: var(--font-mono); font-size: 12.5px; color: var(--muted); }

/* ---------- reveal on scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.001s !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .nav-links {
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    gap: 2px;
    padding: 10px 28px 22px;
    background: rgba(17, 24, 39, 0.97);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
  }
  .nav-links.open { display: flex; }
  .nav-link { display: block; padding: 10px 0; font-size: 15px; }
  .nav-toggle { display: flex; }
}

@media (max-width: 800px) {
  .section { padding: 72px 0; }
  .about-grid,
  .cap-cols,
  .edu-grid { grid-template-columns: 1fr; gap: 40px; }
  .skills-grid { grid-template-columns: 1fr; gap: 36px; }
  .soft-list { grid-template-columns: 1fr; gap: 28px; }
  .capstone { padding: 24px 20px; }
}

@media (max-width: 560px) {
  .container { padding: 0 20px; }
  .hero { padding-top: calc(var(--nav-h) + 60px); }
  .runlog pre { font-size: 11.5px; line-height: 1.75; }
  .hero-actions .btn { flex: 1 1 auto; text-align: center; }
  .hero-meta { margin-left: 0; width: 100%; }
  .proj { grid-template-columns: 1fr; gap: 8px; padding: 28px 0; }
  .proj-num { padding-top: 0; }
  .contact-row { grid-template-columns: 84px 1fr auto; gap: 12px; }
  .cc-value { font-size: 16px; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 14px; }
}