/* ==========================================================================
   Shawon Hasan — personal site
   Typography: system serif (display) + system sans (body/UI).
   No external font requests — chosen deliberately for speed and longevity.
   ========================================================================== */

:root {
  --font-serif: ui-serif, Georgia, "Iowan Old Style", "Palatino Linotype", Palatino, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --color-bg: #FAF9F6;
  --color-bg-alt: #F1EFEA;
  --color-ink: #1C1B18;
  --color-ink-soft: #55524A;
  --color-line: #DDD9CF;
  --color-line-strong: #B9B4A6;

  --content-width: 760px;
  --wide-width: 980px;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.75rem;
  --space-4: 2.75rem;
  --space-5: 4.5rem;
  --space-6: 7rem;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: 1.15;
  margin: 0 0 var(--space-2);
  color: var(--color-ink);
}

h1 { font-size: clamp(2.5rem, 5.5vw + 1rem, 4.25rem); font-weight: 500; letter-spacing: -0.01em; }
h2 { font-size: clamp(1.6rem, 2.2vw + 1rem, 2.15rem); }
h3 { font-size: 1.2rem; font-style: italic; font-weight: 500; }

p { margin: 0 0 var(--space-2); max-width: 62ch; }

a { color: var(--color-ink); }

ul { list-style: none; margin: 0; padding: 0; }

button { font-family: inherit; }

/* ---------- utility ---------- */
.wrap {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

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

.skip-link {
  position: absolute;
  left: var(--space-2);
  top: -3rem;
  background: var(--color-ink);
  color: var(--color-bg);
  padding: 0.6rem 1rem;
  z-index: 100;
  transition: top 0.15s ease;
  text-decoration: none;
  border-radius: 2px;
}
.skip-link:focus { top: var(--space-2); }

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

/* ---------- header ---------- */
.site-header {
  border-bottom: 1px solid var(--color-line);
  padding: var(--space-2) 0;
  position: relative;
}

.header-inner {
  max-width: var(--wide-width);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.wordmark {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  text-decoration: none;
  color: var(--color-ink);
  letter-spacing: -0.01em;
}

.site-nav {
  display: flex;
  gap: var(--space-3);
}

.site-nav a {
  text-decoration: none;
  color: var(--color-ink-soft);
  font-size: 0.95rem;
  padding: 0.25rem 0;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

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

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  position: relative;
}

.menu-toggle span {
  position: absolute;
  left: 0.4rem;
  right: 0.4rem;
  height: 1px;
  background: var(--color-ink);
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.menu-toggle span:nth-child(1) { top: 0.8rem; }
.menu-toggle span:nth-child(2) { top: 1.15rem; }
.menu-toggle span:nth-child(3) { top: 1.5rem; }

.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(0.35rem) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-0.35rem) rotate(-45deg); }

/* ---------- hero ---------- */
.hero {
  padding: var(--space-6) var(--space-3) var(--space-5);
}

.eyebrow {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-ink-soft);
  margin: 0 0 var(--space-1);
}

.hero-lede {
  font-size: 1.15rem;
  color: var(--color-ink-soft);
  max-width: 46ch;
  margin-top: var(--space-2);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

@media (prefers-reduced-motion: no-preference) {
  .hero { animation: rise 0.6s ease both; }
}
@keyframes rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- buttons ---------- */
.btn {
  display: inline-block;
  text-decoration: none;
  font-size: 0.95rem;
  padding: 0.85rem 1.5rem;
  border-radius: 3px;
  border: 1px solid var(--color-ink);
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
  background: var(--color-ink);
  color: var(--color-bg);
}
.btn-primary:hover,
.btn-primary:focus-visible { background: #34322C; }

.btn-secondary {
  background: transparent;
  color: var(--color-ink);
}
.btn-secondary:hover,
.btn-secondary:focus-visible { background: var(--color-ink); color: var(--color-bg); }

/* ---------- philosophy statement ---------- */
.philosophy {
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  background: var(--color-bg-alt);
  padding: var(--space-4) 0;
}

.philosophy-line {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1.25rem, 2.2vw + 0.75rem, 1.9rem);
  text-align: center;
  margin: 0;
  color: var(--color-ink);
  max-width: none;
}

.philosophy-line span[aria-hidden] {
  color: var(--color-line-strong);
  margin: 0 0.35em;
  font-style: normal;
}

/* ---------- about ---------- */
.about { padding: var(--space-5) var(--space-3); }

.about-grid {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: var(--space-4);
  align-items: start;
}

.portrait-frame {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-line);
}

.portrait-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%);
}

.portrait-frame.portrait-empty img { display: none; }
.portrait-frame.portrait-empty {
  display: flex;
  align-items: center;
  justify-content: center;
}
.portrait-frame.portrait-empty::after {
  content: "S H";
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--color-line-strong);
  font-size: 1.5rem;
  letter-spacing: 0.1em;
}

.about-copy h2 { margin-bottom: var(--space-2); }

/* ---------- focus grid ---------- */
.focus { padding: var(--space-5) var(--space-3); max-width: var(--wide-width); }

.focus h2 { margin-bottom: var(--space-4); }

.focus-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: var(--space-4);
}

.focus-item {
  border-top: 1px solid var(--color-line);
  padding: var(--space-3) 0;
}

.focus-item h3 { margin-bottom: 0.4rem; }
.focus-item p { margin: 0; color: var(--color-ink-soft); max-width: 42ch; }

/* ---------- generic sections ---------- */
.section { padding: var(--space-5) var(--space-3); }

.section-band {
  background: var(--color-bg-alt);
  padding: var(--space-5) 0;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.section-intro { color: var(--color-ink-soft); }

.placeholder-note {
  font-style: italic;
  color: var(--color-line-strong);
  border-left: 2px solid var(--color-line);
  padding-left: var(--space-2);
}

.contact-placeholder { color: var(--color-ink-soft); }
.contact-placeholder [data-placeholder] { color: var(--color-ink); }
.placeholder-tag { font-size: 0.85rem; color: var(--color-line-strong); }

/* ---------- social list ---------- */
.social-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--color-line);
  max-width: 32ch;
}

.social-list li { border-bottom: 1px solid var(--color-line); }

.social-list a {
  display: block;
  padding: var(--space-2) 0;
  text-decoration: none;
  font-family: var(--font-serif);
  font-size: 1.1rem;
  transition: padding-left 0.15s ease, color 0.15s ease;
}

.social-list a:hover,
.social-list a:focus-visible {
  padding-left: 0.5rem;
  color: var(--color-ink-soft);
}

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-line);
  padding-top: var(--space-4);
  margin-top: var(--space-3);
  color: var(--color-ink-soft);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding-bottom: var(--space-3);
}

.footer-name {
  font-family: var(--font-serif);
  margin: 0;
  color: var(--color-ink);
}
.footer-tagline { margin: 0.15rem 0 0; font-size: 0.9rem; }

.footer-social {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.footer-social a {
  text-decoration: none;
  color: var(--color-ink-soft);
  font-size: 0.9rem;
}
.footer-social a:hover,
.footer-social a:focus-visible { color: var(--color-ink); }

.copyright {
  font-size: 0.85rem;
  border-top: 1px solid var(--color-line);
  padding: var(--space-2) 0 var(--space-4);
}

/* ---------- responsive ---------- */
@media (min-width: 700px) {
  .about-grid { grid-template-columns: 220px 1fr; }
  .portrait-frame { width: 220px; height: 220px; }
}

@media (max-width: 700px) {
  .site-nav {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-line);
    padding: var(--space-2) var(--space-3) var(--space-3);
    gap: var(--space-2);
  }
  .site-nav.is-open { display: flex; }
  .menu-toggle { display: block; }

  .about-grid { grid-template-columns: 1fr; }
  .portrait-frame { width: 140px; height: 140px; }

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

  .hero { padding-top: var(--space-5); }
}

@media (max-width: 420px) {
  body { font-size: 1rem; }
  .wrap { padding: 0 var(--space-2); }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

html { scroll-behavior: smooth; }