/* ============================================================
   Nader Absy — portfolio
   ============================================================ */

:root {
  --bg:            #ffffff;
  --bg-alt:        #f6f7f9;
  --surface:       #ffffff;
  --surface-2:     #f1f3f6;
  --text:          #14171c;
  --text-muted:    #5b636e;
  --border:        #e3e6ea;
  --accent:        #2f6df6;
  --accent-soft:   rgba(47, 109, 246, 0.10);
  --accent-text:   #1f52c9;
  --shadow-sm:     0 1px 2px rgba(16, 20, 28, .06), 0 2px 8px rgba(16, 20, 28, .04);
  --shadow-md:     0 4px 12px rgba(16, 20, 28, .08), 0 12px 32px rgba(16, 20, 28, .06);

  --wrap:          1180px;
  --radius:        14px;
  --radius-lg:     20px;

  --step--1: clamp(.82rem, .78rem + .18vw, .92rem);
  --step-0:  clamp(1rem, .96rem + .2vw, 1.08rem);
  --step-1:  clamp(1.18rem, 1.1rem + .4vw, 1.4rem);
  --step-2:  clamp(1.5rem, 1.32rem + .8vw, 2rem);
  --step-3:  clamp(2rem, 1.6rem + 1.9vw, 3.1rem);
  --step-4:  clamp(2.6rem, 1.9rem + 3.2vw, 4.4rem);
}

[data-theme="dark"] {
  --bg:            #0f1115;
  --bg-alt:        #14171d;
  --surface:       #171a21;
  --surface-2:     #1d212a;
  --text:          #e8eaee;
  --text-muted:    #9aa3b0;
  --border:        #262b35;
  --accent:        #6c9bff;
  --accent-soft:   rgba(108, 155, 255, 0.12);
  --accent-text:   #9dbaff;
  --shadow-sm:     0 1px 2px rgba(0, 0, 0, .4);
  --shadow-md:     0 4px 14px rgba(0, 0, 0, .45), 0 14px 40px rgba(0, 0, 0, .35);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: "Poppins", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: var(--step-0);
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  transition: background-color .25s ease, color .25s ease;
}

h1, h2, h3 { line-height: 1.2; margin: 0; font-weight: 600; letter-spacing: -0.02em; }
p { margin: 0 0 1rem; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { margin: 0; padding: 0; list-style: none; }

a { color: var(--accent-text); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: .25em; }

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

.wrap { width: min(100% - 2.5rem, var(--wrap)); margin-inline: auto; }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 999;
  background: var(--accent); color: #fff; padding: .7rem 1.1rem;
  border-radius: 0 0 var(--radius) 0; font-weight: 500;
}
.skip-link:focus { left: 0; }

.eyebrow {
  font-size: var(--step--1); color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .14em; font-weight: 500; margin-bottom: .4rem;
}
.accent { color: var(--accent-text); }

/* ---------- header ---------- */

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s ease, box-shadow .25s ease;
}
.site-header.scrolled { border-bottom-color: var(--border); box-shadow: var(--shadow-sm); }

.header-inner { display: flex; align-items: center; gap: 1.5rem; min-height: 4.6rem; }

.logo {
  font-size: var(--step-1); font-weight: 600; color: var(--text);
  letter-spacing: -.02em; margin-right: auto;
}
.logo:hover { text-decoration: none; color: var(--accent-text); }

.primary-nav ul { display: flex; gap: 2rem; }
.primary-nav a {
  color: var(--text-muted); font-size: var(--step--1); font-weight: 500;
  letter-spacing: .02em; padding: .35rem 0; position: relative;
}
.primary-nav a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 2px;
  background: var(--accent); transform: scaleX(0); transform-origin: left;
  transition: transform .22s ease;
}
.primary-nav a:hover { color: var(--text); text-decoration: none; }
.primary-nav a:hover::after,
.primary-nav a[aria-current="true"]::after { transform: scaleX(1); }
.primary-nav a[aria-current="true"] { color: var(--text); }

.header-actions { display: flex; align-items: center; gap: .6rem; }

.icon-btn {
  display: grid; place-items: center; width: 2.4rem; height: 2.4rem;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 50%; cursor: pointer; color: var(--text);
  transition: background-color .2s ease, transform .2s ease;
}
.icon-btn:hover { background: var(--accent-soft); transform: translateY(-1px); }
.icon-btn svg { width: 1.05rem; height: 1.05rem; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }
.ico-moon { display: none; }
[data-theme="dark"] .ico-sun  { display: none; }
[data-theme="dark"] .ico-moon { display: block; fill: currentColor; stroke: none; }

.nav-toggle {
  display: none; flex-direction: column; justify-content: space-between;
  width: 1.6rem; height: 1.05rem; background: none; border: 0; cursor: pointer; padding: 0;
}
.nav-toggle span {
  display: block; height: 2px; width: 100%; background: var(--text); border-radius: 2px;
  transition: transform .28s ease, opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(.52rem) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-.52rem) rotate(-45deg); }

.mobile-nav { border-top: 1px solid var(--border); background: var(--bg); }
.mobile-nav ul { display: flex; flex-direction: column; padding: .5rem 0 1rem; }
.mobile-nav a {
  display: block; padding: .85rem 1.25rem; color: var(--text);
  font-weight: 500; width: min(100% - 2.5rem, var(--wrap)); margin-inline: auto;
}
.mobile-nav a:hover { background: var(--surface-2); text-decoration: none; border-radius: 8px; }

/* ---------- hero ---------- */

/* The name is the hero: it fills most of the first screen on its own. */
.hero {
  min-height: calc(100svh - 4.6rem); display: flex; align-items: center;
  padding: clamp(3rem, 7vw, 6rem) 0;
}
.hero h1 {
  font-size: clamp(3.6rem, 1.2rem + 10.5vw, 10rem); font-weight: 700;
  line-height: .95; letter-spacing: -.045em; margin: .2rem 0 1.4rem;
}
.hero-role { font-size: var(--step-2); font-weight: 500; color: var(--text); margin-bottom: 1rem; }
.hero-blurb { color: var(--text-muted); max-width: 62ch; margin-bottom: 1.9rem; }

.btn-row { display: flex; flex-wrap: wrap; gap: .8rem; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .8rem 1.6rem; border-radius: 999px; font-size: var(--step--1);
  font-weight: 500; cursor: pointer; border: 1.5px solid transparent;
  transition: transform .18s ease, background-color .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn-primary { background: var(--text); color: var(--bg); }
.btn-primary:hover { box-shadow: var(--shadow-md); }
.btn-ghost { border-color: var(--border); color: var(--text); background: transparent; }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-text); background: var(--accent-soft); }
.btn-small { padding: .55rem 1.15rem; border: 1.5px solid var(--border); color: var(--text); }
.btn-small:hover { border-color: var(--accent); color: var(--accent-text); background: var(--accent-soft); }

.socials { display: flex; gap: .7rem; margin-top: 1.9rem; }
.socials a {
  display: grid; place-items: center; width: 2.6rem; height: 2.6rem;
  border: 1px solid var(--border); border-radius: 50%; color: var(--text);
  transition: transform .2s ease, border-color .2s ease, background-color .2s ease;
}
.socials a:hover { transform: translateY(-3px); border-color: var(--accent); background: var(--accent-soft); color: var(--accent-text); }
.socials svg { width: 1.15rem; height: 1.15rem; fill: currentColor; }

/* ---------- sections ---------- */

.section { padding: clamp(3.5rem, 8vw, 6.5rem) 0; }
.section-alt { background: var(--bg-alt); }
.section-title { font-size: var(--step-3); margin-bottom: clamp(2rem, 4vw, 3.2rem); }

/* ---------- about ---------- */

.about-grid {
  display: grid; grid-template-columns: minmax(0, 340px) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4rem); align-items: start;
}
.about-photo img {
  width: 100%; aspect-ratio: 1; object-fit: cover;
  border-radius: var(--radius-lg); box-shadow: var(--shadow-md);
}
.about-body p { color: var(--text-muted); }
.about-body strong { color: var(--text); font-weight: 600; }

.fact-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 1rem; margin-bottom: 2rem; }
.fact-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.2rem 1.3rem; box-shadow: var(--shadow-sm);
}
.fact-card h3 { font-size: var(--step--1); text-transform: uppercase; letter-spacing: .1em; color: var(--text-muted); margin-bottom: .5rem; font-weight: 500; }
.fact-card p { margin: 0; font-size: var(--step--1); color: var(--text); line-height: 1.55; }

/* ---------- timeline ---------- */

.timeline { position: relative; padding-left: 2.2rem; }
.timeline::before {
  content: ""; position: absolute; left: .42rem; top: .6rem; bottom: .6rem;
  width: 2px; background: var(--border);
}
.timeline-item { position: relative; padding-bottom: 2.8rem; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: ""; position: absolute; left: -2.2rem; top: .55rem;
  width: .95rem; height: .95rem; border-radius: 50%;
  background: var(--bg-alt); border: 2.5px solid var(--accent);
}
.timeline-head { margin-bottom: .9rem; }
.timeline-head h3 { font-size: var(--step-1); margin-bottom: .25rem; }
.org { color: var(--text); font-weight: 500; margin: 0 0 .1rem; font-size: var(--step--1); }
.sep { color: var(--text-muted); margin: 0 .3rem; }
.period { color: var(--text-muted); font-size: var(--step--1); margin: 0; }
.bullets li {
  position: relative; padding-left: 1.25rem; margin-bottom: .55rem;
  color: var(--text-muted); font-size: var(--step--1); line-height: 1.65;
}
.bullets li::before {
  content: ""; position: absolute; left: 0; top: .62em;
  width: .35rem; height: .35rem; border-radius: 50%; background: var(--accent);
}

/* ---------- skills ---------- */

.skills-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.25rem; }
.skill-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.6rem; box-shadow: var(--shadow-sm);
  transition: transform .22s ease, box-shadow .22s ease;
}
.skill-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.skill-card h3 { font-size: var(--step-1); margin-bottom: 1.1rem; }
.tags { display: flex; flex-wrap: wrap; gap: .5rem; }
.tags li {
  font-size: var(--step--1); padding: .35rem .85rem; border-radius: 999px;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text-muted);
}

/* ---------- projects ---------- */

.feature-card {
  background: var(--surface); border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-lg); padding: clamp(1.5rem, 3vw, 2.4rem);
  box-shadow: var(--shadow-sm); margin-bottom: 1.75rem;
}
.feature-tag {
  display: inline-block; font-size: var(--step--1); font-weight: 500;
  color: var(--accent-text); background: var(--accent-soft);
  padding: .25rem .8rem; border-radius: 999px; margin-bottom: .9rem;
}
.feature-card h3 { font-size: var(--step-1); margin-bottom: .6rem; }
.feature-meta { font-size: var(--step--1); color: var(--text-muted); margin-bottom: 1rem; }
.feature-body > p:last-child { color: var(--text-muted); margin-bottom: 0; }

.project-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; }
.project-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm);
  display: flex; flex-direction: column;
  transition: transform .22s ease, box-shadow .22s ease;
}
.project-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.project-card img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border-bottom: 1px solid var(--border); }
.project-body { padding: 1.4rem; display: flex; flex-direction: column; flex: 1; }
.project-body h3 { font-size: var(--step-1); margin-bottom: .6rem; }
.project-body p { color: var(--text-muted); font-size: var(--step--1); }
.stack { font-size: var(--step--1); color: var(--accent-text); font-weight: 500; }
.project-body .btn-row { margin-top: auto; padding-top: .6rem; }

/* ---------- contact ---------- */

.contact-lead { color: var(--text-muted); max-width: 60ch; margin-bottom: 2.2rem; }
.contact-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.1rem; }
.contact-card {
  display: grid; gap: .2rem; justify-items: start;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.5rem; color: var(--text);
  box-shadow: var(--shadow-sm);
  transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}
.contact-card:hover { transform: translateY(-3px); border-color: var(--accent); box-shadow: var(--shadow-md); text-decoration: none; }
.contact-card svg { width: 1.5rem; height: 1.5rem; fill: var(--accent); margin-bottom: .6rem; }
.contact-label { font-size: var(--step--1); color: var(--text-muted); text-transform: uppercase; letter-spacing: .1em; }
.contact-value { font-weight: 500; word-break: break-word; }

/* ---------- footer ---------- */

.site-footer { border-top: 1px solid var(--border); padding: 2.5rem 0; background: var(--bg); }
.footer-inner { display: grid; gap: 1.1rem; justify-items: center; text-align: center; }
.footer-name { font-weight: 600; font-size: var(--step-1); margin: 0; }
.site-footer nav ul { display: flex; flex-wrap: wrap; gap: 1.5rem; justify-content: center; }
.site-footer nav a { color: var(--text-muted); font-size: var(--step--1); }
.site-footer nav a:hover { color: var(--text); }
.copyright { color: var(--text-muted); font-size: var(--step--1); margin: 0; }

/* ---------- scroll reveal ---------- */

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .primary-nav { display: none; }
  .nav-toggle { display: flex; }
  .hero { min-height: 0; }
  .about-grid { grid-template-columns: 1fr; }
  .about-photo { width: min(68vw, 300px); margin-inline: auto; }
}

@media (max-width: 560px) {
  .timeline { padding-left: 1.6rem; }
  .timeline-item::before { left: -1.6rem; width: .8rem; height: .8rem; }
  .btn { width: 100%; }
  .project-body .btn-row .btn { width: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

@media print {
  .site-header, .socials, .btn-row, .site-footer nav { display: none; }
  body { color: #000; background: #fff; }
  .reveal { opacity: 1; transform: none; }
  .hero { min-height: 0; padding-bottom: 1rem; }
}

/* ---------- role portfolio line ---------- */

.portfolio-label {
  font-size: var(--step--1);
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--text-muted);
  font-weight: 500;
  margin: 1.3rem 0 .45rem;
}
.portfolio-inline {
  font-size: var(--step--1);
  color: var(--text-muted);
  line-height: 1.9;
  margin: 0;
}
.portfolio-inline a { font-weight: 500; }