:root {
  color-scheme: light;
  --bg: #f6f7f5;
  --surface: #ffffff;
  --surface-soft: #edf3ef;
  --surface-strong: #17201b;
  --text: #162019;
  --text-soft: #56635c;
  --text-inverse: #f8fbf8;
  --line: #d9e2dc;
  --accent: #0f8f72;
  --accent-strong: #09614f;
  --accent-soft: #d9f3ec;
  --shadow: 0 20px 70px rgba(31, 44, 36, 0.12);
  --radius: 8px;
  --max: 1120px;
}

body.dark {
  color-scheme: dark;
  --bg: #101411;
  --surface: #171d19;
  --surface-soft: #202820;
  --surface-strong: #eef5ef;
  --text: #edf5ef;
  --text-soft: #b6c3ba;
  --text-inverse: #17201b;
  --line: #304038;
  --accent: #5ee0be;
  --accent-strong: #8af0d3;
  --accent-soft: #1d3b33;
  --shadow: 0 20px 70px rgba(0, 0, 0, 0.36);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 100;
  padding: 0.65rem 0.9rem;
  background: var(--surface-strong);
  color: var(--text-inverse);
  border-radius: var(--radius);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  backdrop-filter: blur(18px);
}

.nav-shell {
  position: relative;
  width: min(calc(100% - 2rem), var(--max));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
  font-weight: 800;
}

.brand-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--surface-strong);
  color: var(--text-inverse);
  box-shadow: inset 0 0 0 2px var(--accent-soft);
}

.brand-text {
  display: grid;
  line-height: 1.1;
}

.brand-name {
  font-size: 0.98rem;
}

.brand-role {
  color: var(--text-soft);
  font-size: 0.76rem;
  font-weight: 700;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  margin-left: auto;
}

.nav-links a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0 0.8rem;
  color: var(--text-soft);
  font-size: 0.9rem;
  font-weight: 750;
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible,
.nav-links a.is-active {
  background: var(--accent-soft);
  color: var(--accent-strong);
  outline: none;
}

.nav-actions {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.control-btn,
.primary-link,
.secondary-link {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid var(--line);
  padding: 0 1rem;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 800;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
  white-space: nowrap;
}

.control-btn {
  background: var(--surface);
  color: var(--text);
}

.control-btn:hover,
.control-btn:focus-visible,
.primary-link:hover,
.primary-link:focus-visible,
.secondary-link:hover,
.secondary-link:focus-visible {
  transform: translateY(-1px);
  border-color: var(--accent);
  outline: none;
}

.menu-btn {
  display: none;
}

.primary-link {
  border-color: var(--surface-strong);
  background: var(--surface-strong);
  color: var(--text-inverse);
}

.secondary-link {
  background: var(--surface);
  color: var(--text);
}

.page {
  overflow: clip;
}

.hero {
  position: relative;
  min-height: calc(100vh - 72px);
  display: grid;
  align-items: end;
  isolation: isolate;
  background:
    linear-gradient(90deg, rgba(16, 20, 17, 0.88) 0%, rgba(16, 20, 17, 0.75) 38%, rgba(16, 20, 17, 0.22) 76%),
    url("../images/faisal.jpg");
  background-size: cover;
  background-position: center 34%;
  color: #f8fbf8;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 35%;
  z-index: -1;
  background: linear-gradient(180deg, transparent, rgba(16, 20, 17, 0.68));
}

.hero-inner {
  width: min(calc(100% - 2rem), var(--max));
  margin: 0 auto;
  padding: 5rem 0 4rem;
}

.eyebrow {
  width: fit-content;
  margin: 0 0 1.15rem;
  border: 1px solid rgba(248, 251, 248, 0.28);
  border-radius: 999px;
  padding: 0.38rem 0.75rem;
  background: rgba(248, 251, 248, 0.11);
  color: #d9f3ec;
  font-size: 0.82rem;
  font-weight: 850;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 780px;
  margin-bottom: 1rem;
  font-size: 4.25rem;
  line-height: 0.95;
  letter-spacing: 0;
}

.hero-subtitle {
  max-width: 720px;
  margin-bottom: 1.75rem;
  color: rgba(248, 251, 248, 0.86);
  font-size: 1.25rem;
}

.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero .primary-link {
  border-color: #f8fbf8;
  background: #f8fbf8;
  color: #17201b;
}

.hero .secondary-link {
  border-color: rgba(248, 251, 248, 0.34);
  background: rgba(248, 251, 248, 0.12);
  color: #f8fbf8;
}

.hero-metrics {
  width: min(calc(100% - 2rem), var(--max));
  margin: -2rem auto 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  box-shadow: var(--shadow);
  position: relative;
  z-index: 2;
}

.metric {
  min-height: 112px;
  padding: 1.15rem;
  background: var(--surface);
}

.metric strong {
  display: block;
  color: var(--text);
  font-size: 1.55rem;
  line-height: 1;
}

.metric span {
  display: block;
  margin-top: 0.4rem;
  color: var(--text-soft);
  font-size: 0.9rem;
  font-weight: 700;
}

.section {
  padding: 5.5rem 0;
}

.section.alt {
  background: var(--surface-soft);
}

.container {
  width: min(calc(100% - 2rem), var(--max));
  margin: 0 auto;
}

.section-head {
  max-width: 760px;
  margin-bottom: 2.25rem;
}

.kicker {
  margin-bottom: 0.55rem;
  color: var(--accent-strong);
  font-size: 0.82rem;
  font-weight: 900;
  text-transform: uppercase;
}

h2 {
  margin-bottom: 0.7rem;
  color: var(--text);
  font-size: 2.25rem;
  line-height: 1.1;
  letter-spacing: 0;
}

.section-head p,
.about-copy p,
.contact-copy {
  color: var(--text-soft);
  font-size: 1.04rem;
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.8fr);
  gap: 2rem;
  align-items: start;
}

.about-copy {
  display: grid;
  gap: 1.1rem;
}

.focus-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.focus-list li {
  min-height: 88px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
  background: var(--surface);
  color: var(--text-soft);
}

.focus-list strong {
  display: block;
  margin-bottom: 0.2rem;
  color: var(--text);
  font-size: 1rem;
}

.profile-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.profile-panel img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center 20%;
}

.profile-panel-body {
  padding: 1.15rem;
}

.profile-panel-body p {
  margin: 0 0 0.9rem;
  color: var(--text-soft);
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.65rem;
}

.link-grid a {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 800;
  transition: border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.link-grid a:hover,
.link-grid a:focus-visible {
  border-color: var(--accent);
  color: var(--accent-strong);
  transform: translateY(-1px);
  outline: none;
}

.timeline {
  position: relative;
  display: grid;
  gap: 1rem;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0.75rem;
  bottom: 0.75rem;
  left: 0.7rem;
  width: 2px;
  background: var(--line);
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 1.7rem minmax(0, 1fr);
  gap: 1rem;
}

.timeline-dot {
  width: 0.9rem;
  height: 0.9rem;
  margin-top: 0.45rem;
  border: 3px solid var(--surface-soft);
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 1px var(--line);
  z-index: 1;
}

.timeline-card,
.project-card,
.skill-group,
.teaching-card,
.publication-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 12px 40px rgba(31, 44, 36, 0.07);
}

body.dark .timeline-card,
body.dark .project-card,
body.dark .skill-group,
body.dark .teaching-card,
body.dark .publication-card {
  box-shadow: none;
}

.timeline-card {
  padding: 1.3rem;
}

.timeline-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.35rem;
  color: var(--text-soft);
  font-size: 0.9rem;
  font-weight: 800;
}

.timeline-card h3,
.project-card h3,
.skill-group h3,
.teaching-card h3,
.publication-card h3 {
  margin-bottom: 0.55rem;
  color: var(--text);
  font-size: 1.15rem;
  line-height: 1.25;
}

.timeline-card ul,
.project-card ul {
  display: grid;
  gap: 0.45rem;
  margin: 0;
  padding-left: 1.1rem;
  color: var(--text-soft);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.1rem;
}

.filter-btn {
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 0.95rem;
  background: var(--surface);
  color: var(--text-soft);
  cursor: pointer;
  font-weight: 850;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.filter-btn:hover,
.filter-btn:focus-visible,
.filter-btn.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-strong);
  outline: none;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.project-card {
  display: grid;
  min-height: 100%;
  padding: 1.25rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.project-card.featured {
  grid-column: span 2;
  border-color: var(--accent);
  background:
    linear-gradient(135deg, var(--accent-soft) 0%, var(--surface) 42%),
    var(--surface);
}

.project-kicker {
  margin: 0 0 0.45rem;
  color: var(--accent-strong);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.project-summary {
  margin: 0 0 0.75rem;
  color: var(--text-soft);
}

.package-command {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
  width: fit-content;
  margin-top: 0.95rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.55rem 0.7rem;
  background: var(--surface);
  color: var(--text-soft);
  font-size: 0.85rem;
  font-weight: 850;
}

.package-command code {
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.84rem;
}

.project-card:hover,
.project-card:focus-within {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.project-card.is-hidden {
  display: none;
}

.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.9rem;
}

.project-link {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 0.78rem;
  background: var(--surface-soft);
  color: var(--accent-strong);
  font-size: 0.82rem;
  font-weight: 850;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.project-link:hover,
.project-link:focus-visible {
  transform: translateY(-1px);
  border-color: var(--accent);
  background: var(--accent-soft);
  outline: none;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: auto;
  padding-top: 1rem;
}

.tag {
  border-radius: 999px;
  padding: 0.25rem 0.55rem;
  background: var(--surface-soft);
  color: var(--text-soft);
  font-size: 0.78rem;
  font-weight: 800;
}

.tag.accent {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.skill-group {
  padding: 1.25rem;
}

.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.skill-list li {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.34rem 0.62rem;
  background: var(--surface-soft);
  color: var(--text-soft);
  font-size: 0.88rem;
  font-weight: 750;
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1rem;
}

.teaching-grid {
  grid-template-columns: 1fr;
}

.teaching-card,
.publication-card {
  padding: 1.25rem;
}

.teaching-card.featured {
  border-color: var(--accent);
  background:
    linear-gradient(135deg, var(--accent-soft) 0%, var(--surface) 44%),
    var(--surface);
}

.teaching-kicker {
  margin: 0 0 0.45rem;
  color: var(--accent-strong);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.teaching-card p,
.publication-card p {
  color: var(--text-soft);
}

.teaching-list {
  display: grid;
  gap: 0.45rem;
  margin: 0.85rem 0 1rem;
  padding-left: 1.1rem;
  color: var(--text-soft);
}

.text-link {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  color: var(--accent-strong);
  font-weight: 850;
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-underline-offset: 0.24em;
}

.contact-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1.5rem;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2rem;
  background: var(--surface-strong);
  color: var(--text-inverse);
  box-shadow: var(--shadow);
}

.contact-panel h2 {
  color: var(--text-inverse);
}

.contact-panel .kicker,
.contact-copy {
  color: var(--text-inverse);
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.65rem;
}

.contact-actions .primary-link {
  border-color: var(--text-inverse);
  background: var(--text-inverse);
  color: var(--surface-strong);
}

.contact-actions .secondary-link {
  border-color: var(--text-inverse);
  background: transparent;
  color: var(--text-inverse);
}

.site-footer {
  width: min(calc(100% - 2rem), var(--max));
  margin: 0 auto;
  padding: 2rem 0 2.5rem;
  color: var(--text-soft);
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid var(--line);
}

.top-link {
  color: var(--accent-strong);
  font-weight: 850;
}

.toast {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 90;
  max-width: min(320px, calc(100vw - 2rem));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.8rem 1rem;
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal {
  opacity: 1;
  transform: none;
}

.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .nav-links {
    position: absolute;
    inset: 72px 1rem auto;
    display: none;
    flex-direction: column;
    align-items: stretch;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 0.5rem;
    background: var(--surface);
    box-shadow: var(--shadow);
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-links a {
    justify-content: center;
    border-radius: var(--radius);
  }

  .menu-btn {
    display: inline-flex;
  }

  h1 {
    font-size: 3.4rem;
  }

  .hero {
    min-height: 760px;
    background-position: 58% center;
  }

  .hero-metrics,
  .skills-grid,
  .project-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .about-grid,
  .contact-panel {
    grid-template-columns: 1fr;
  }

  .contact-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 680px) {
  .nav-shell {
    width: min(calc(100% - 1rem), var(--max));
    flex-wrap: wrap;
    gap: 0.25rem 0.75rem;
    padding: 0.6rem 0 0;
  }

  .brand-role {
    display: none;
  }

  .control-btn {
    min-height: 40px;
    padding: 0 0.75rem;
    font-size: 0.84rem;
  }

  .theme-btn {
    display: none;
  }

  .menu-btn {
    display: none;
  }

  .nav-links {
    position: static;
    display: flex;
    flex: 0 0 100%;
    flex-direction: row;
    justify-content: flex-start;
    order: 3;
    width: 100%;
    margin-left: 0;
    overflow-x: auto;
    border: 0;
    border-radius: 0;
    padding: 0.1rem 0 0.65rem;
    background: transparent;
    box-shadow: none;
    scrollbar-width: none;
  }

  .nav-links::-webkit-scrollbar {
    display: none;
  }

  .nav-links a {
    flex: 0 0 auto;
    min-height: 36px;
  }

  .hero {
    min-height: 680px;
    background:
      linear-gradient(180deg, rgba(16, 20, 17, 0.2) 0%, rgba(16, 20, 17, 0.74) 48%, rgba(16, 20, 17, 0.92) 100%),
      url("../images/faisal.jpg");
    background-size: cover;
    background-position: center top;
  }

  .hero-inner {
    width: calc(100vw - 2rem);
    max-width: calc(100vw - 2rem);
    padding: 16rem 0 2.5rem;
  }

  .eyebrow,
  h1,
  .hero-subtitle {
    max-width: 100%;
  }

  h1 {
    font-size: 2.75rem;
  }

  .hero-subtitle {
    font-size: 1.05rem;
  }

  h2 {
    font-size: 1.85rem;
  }

  .section {
    padding: 4rem 0;
  }

  .hero-metrics,
  .focus-list,
  .skills-grid,
  .project-grid,
  .two-column,
  .link-grid {
    grid-template-columns: 1fr;
  }

  .project-card.featured {
    grid-column: auto;
  }

  .hero-actions,
  .contact-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .primary-link,
  .secondary-link,
  .contact-actions .primary-link,
  .contact-actions .secondary-link {
    width: 100%;
  }

  .timeline-meta {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.15rem;
  }

  .contact-panel {
    padding: 1.35rem;
  }

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .js .reveal,
  .reveal {
    opacity: 1;
    transform: none;
  }
}