/* Imam Hasan — portfolio
   Light, developer-focused system: IBM Plex Sans + JetBrains Mono
   Monochrome zinc + blue CTA
*/

:root {
  --bg: #fafafa;
  --bg-alt: #f4f4f5;
  --ink: #09090b;
  --ink-2: #3f3f46;
  --ink-3: #71717a;
  --line: #e4e4e7;
  --surface: #ffffff;
  --primary: #18181b;
  --cta: #2563eb;
  --cta-hover: #1d4ed8;
  --cta-soft: #eff6ff;
  --radius: 10px;
  --shell: min(1120px, calc(100% - 2.5rem));
  --header-h: 68px;
  --font: "IBM Plex Sans", "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --focus: 0 0 0 3px rgba(37, 99, 235, 0.35);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(37, 99, 235, 0.08), transparent 55%),
    linear-gradient(180deg, #fafafa 0%, #f4f4f5 100%);
  background-attachment: fixed;
  line-height: 1.6;
  font-size: 1.05rem;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--cta);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--cta-hover);
}

:focus-visible {
  outline: none;
  box-shadow: var(--focus);
}

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100px;
  z-index: 1000;
  background: var(--primary);
  color: #fff;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  text-decoration: none;
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  backdrop-filter: blur(12px);
  background: rgba(250, 250, 250, 0.86);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(250, 250, 250, 0.94);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
}

.brand:hover {
  color: var(--ink);
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  background: var(--primary);
  color: #fafafa;
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.brand-name {
  font-size: 1rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.35rem 1.15rem;
}

.nav a {
  color: var(--ink-2);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.35rem 0;
  position: relative;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--cta);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s var(--ease);
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--ink);
}

.nav a:hover::after,
.nav a:focus-visible::after {
  transform: scaleX(1);
}

.nav-resume {
  color: #fff !important;
  background: var(--cta);
  padding: 0.55rem 0.95rem !important;
  border-radius: 8px;
  text-decoration: none !important;
}

.nav-resume::after {
  display: none !important;
}

.nav-resume:hover {
  background: var(--cta-hover);
  color: #fff !important;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  cursor: pointer;
  padding: 0;
  place-items: center;
  gap: 5px;
  flex-direction: column;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
  transition: transform 0.25s var(--ease), opacity 0.2s;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Hero */
.hero {
  position: relative;
  min-height: calc(100svh - var(--header-h));
  display: grid;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
  padding: clamp(2rem, 5vw, 3.5rem) 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
}

.hero-media {
  position: relative;
  margin: 0;
  border-radius: 18px;
  overflow: hidden;
  aspect-ratio: 4 / 5;
  max-height: min(72vh, 640px);
  background: var(--bg-alt);
  border: 1px solid var(--line);
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  /* Head through torso — not a tight face crop */
  object-position: 50% 12%;
  filter: grayscale(0.08) contrast(1.04);
}

.hero-content {
  padding: 0;
  max-width: 38rem;
  width: auto;
  margin: 0;
}

.hero-eyebrow {
  margin: 0 0 1rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.hero-brand {
  margin: 0;
  font-size: clamp(3rem, 8vw, 5.25rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
  font-weight: 700;
  color: var(--ink);
}

.hero-role {
  margin: 1.15rem 0 0;
  font-size: clamp(1.15rem, 2.4vw, 1.45rem);
  font-weight: 600;
  color: var(--ink-2);
  line-height: 1.35;
  max-width: 28ch;
}

.hero-tagline {
  margin: 1.1rem 0 0;
  color: var(--ink-2);
  max-width: 38rem;
  font-size: 1.05rem;
}

.hero-actions {
  margin-top: 1.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero-content,
.section .section-label,
.section .section-title,
.section .section-lead,
.stack-block,
.about-copy,
.about-aside,
.project-card,
.contact-layout > * {
  animation: rise 0.8s var(--ease) both;
}

.hero-content {
  animation-delay: 0.05s;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 44px;
  padding: 0.7rem 1.15rem;
  border-radius: 8px;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease), transform 0.15s var(--ease);
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--cta);
  color: #fff;
}

.btn-primary:hover {
  background: var(--cta-hover);
  color: #fff;
}

.btn-secondary {
  background: var(--primary);
  color: #fafafa;
}

.btn-secondary:hover {
  background: #27272a;
  color: #fff;
}

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: var(--ink-3);
  color: var(--ink);
}

/* Sections */
.section {
  padding: clamp(3.5rem, 8vw, 6rem) 0;
}

.section-alt {
  background: color-mix(in srgb, var(--bg-alt) 88%, transparent);
  border-block: 1px solid var(--line);
}

.section-label {
  margin: 0 0 0.65rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--cta);
  font-weight: 500;
}

.section-title {
  margin: 0;
  font-size: clamp(1.85rem, 4vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  max-width: 18ch;
}

.section-lead {
  margin: 0.9rem 0 0;
  color: var(--ink-2);
  max-width: 46rem;
}

/* Stack */
.stack-grid {
  margin-top: 2.25rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.stack-block {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.35rem 1.25rem 1.45rem;
}

.stack-block h3 {
  margin: 0 0 1rem;
  font-size: 1rem;
  letter-spacing: -0.01em;
}

.stack-block-accent {
  background: var(--cta-soft);
  border-color: color-mix(in srgb, var(--cta) 22%, var(--line));
}

.tag-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.tag-list li {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-2);
  background: var(--bg-alt);
  border: 1px solid var(--line);
  padding: 0.35rem 0.55rem;
  border-radius: 6px;
}

.stack-block-accent .tag-list li {
  background: #fff;
  border-color: color-mix(in srgb, var(--cta) 18%, var(--line));
  color: #1e3a8a;
}

.tag-list-sm li {
  font-size: 0.7rem;
}

/* About */
.about-layout {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.about-copy p {
  color: var(--ink-2);
  margin: 1rem 0 0;
  max-width: 42rem;
}

.about-copy strong {
  color: var(--ink);
  font-weight: 600;
}

.stat-list {
  margin: 0;
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: grid;
  gap: 1.1rem;
}

.stat-list div {
  display: grid;
  gap: 0.2rem;
}

.stat-list dt {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.stat-list dd {
  margin: 0;
  font-weight: 600;
  color: var(--ink);
}

/* Projects — cards are interaction containers */
.project-grid {
  margin-top: 2.25rem;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.35rem 1.3rem 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: border-color 0.2s var(--ease), transform 0.25s var(--ease);
}

.project-card:hover {
  border-color: color-mix(in srgb, var(--cta) 35%, var(--line));
  transform: translateY(-2px);
}

.project-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}

.project-type {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.project-link {
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
}

.project-link.muted {
  color: var(--ink-3);
  font-weight: 500;
  pointer-events: none;
}

.project-card h3 {
  margin: 0;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.project-card p {
  margin: 0;
  color: var(--ink-2);
  font-size: 0.98rem;
  flex: 1;
}

.client-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.55rem;
}

.client-links a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0.25rem 0.55rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: 6px;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background 0.2s var(--ease);
}

.client-links a:hover,
.client-links a:focus-visible {
  color: var(--cta);
  border-color: color-mix(in srgb, var(--cta) 35%, var(--line));
  background: var(--cta-soft);
}

/* Contact */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.contact-list {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.contact-list li {
  display: grid;
  gap: 0.15rem;
}

.contact-list span {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.contact-list a {
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
}

.contact-list a:hover {
  color: var(--cta);
}

.contact-form {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.35rem;
  display: grid;
  gap: 0.95rem;
}

.botcheck {
  position: absolute;
  left: -9999px;
  opacity: 0;
  height: 0;
  width: 0;
}

.field {
  display: grid;
  gap: 0.4rem;
}

.field label {
  font-size: 0.9rem;
  font-weight: 600;
}

.field input,
.field textarea {
  width: 100%;
  font: inherit;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.75rem 0.85rem;
  min-height: 44px;
  resize: vertical;
}

.field input:focus-visible,
.field textarea:focus-visible {
  border-color: var(--cta);
}

.form-status {
  margin: 0;
  min-height: 1.25rem;
  font-size: 0.92rem;
  color: var(--ink-2);
}

.form-status.is-error {
  color: #b91c1c;
}

.form-status.is-success {
  color: #15803d;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--primary);
  color: #d4d4d8;
  padding: 2.5rem 0 2rem;
}

.footer-inner {
  display: grid;
  gap: 1.5rem;
}

.footer-brand {
  display: flex;
  gap: 0.85rem;
  align-items: center;
}

.footer-brand strong {
  display: block;
  color: #fafafa;
}

.footer-brand p {
  margin: 0.15rem 0 0;
  font-size: 0.9rem;
  color: #a1a1aa;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
}

.footer-nav a {
  color: #e4e4e7;
  text-decoration: none;
  font-weight: 500;
}

.footer-nav a:hover {
  color: #fff;
}

.footer-copy {
  margin: 0;
  font-size: 0.88rem;
  color: #a1a1aa;
}

.footer-copy a {
  color: #e4e4e7;
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* Responsive */
@media (max-width: 960px) {
  .stack-grid,
  .project-grid,
  .about-layout,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    align-items: start;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .hero-media {
    order: -1;
    max-height: min(52vh, 420px);
    aspect-ratio: 5 / 4;
    width: 100%;
  }

  .hero-media img {
    object-position: 50% 18%;
  }

  .hero-content {
    max-width: none;
    width: 100%;
    margin: 0;
    padding: 0;
  }
}

@media (max-width: 780px) {
  :root {
    --shell: min(1120px, calc(100% - 1.5rem));
  }

  .nav-toggle {
    display: grid;
  }

  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.75rem;
    background: rgba(250, 250, 250, 0.98);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 12px 30px rgba(9, 9, 11, 0.08);
  }

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

  .nav a {
    padding: 0.9rem 0.85rem;
  }

  .nav a::after {
    display: none;
  }

  .nav-resume {
    text-align: center;
    margin-top: 0.35rem;
  }

  .hero {
    min-height: auto;
  }

  .hero-role {
    max-width: none;
  }

  .hero-actions .btn {
    flex: 1 1 auto;
  }
}

@media (max-width: 480px) {
  .hero-brand {
    font-size: clamp(2.6rem, 14vw, 3.4rem);
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }
}