/* ==========================================================================
   Portfolio — Md. Ahshan Hafiz Fuad
   White theme · charcoal accent · simple & clean · light animations only
   ========================================================================== */

/* ---------- Design tokens ---------- */
:root {
  --bg: #ffffff;
  --surface: #fafafa;
  --text: #161616;          /* charcoal */
  --text-muted: #6b6b6b;
  --border: #e8e8e8;
  --border-strong: #161616;

  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          Helvetica, Arial, sans-serif;

  --radius: 12px;
  --radius-sm: 8px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.08);

  --header-h: 64px;
}

/* ---------- Reset & base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
}

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

a {
  color: var(--text);
  text-decoration: none;
}

ul {
  list-style: none;
}

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

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

/* ==========================================================================
   Header / navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.logo-dot {
  color: var(--border-strong);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.1rem;
}

.site-nav a {
  padding: 0.4rem 0.7rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  position: relative;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0.7rem;
  right: 0.7rem;
  bottom: 0.15rem;
  height: 2px;
  background: var(--border-strong);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.site-nav a:hover {
  color: var(--text);
}

.site-nav a:hover::after {
  transform: scaleX(1);
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  max-width: 1080px;
  margin: 0 auto;
  padding: 6.5rem 1.5rem 4.5rem;
  text-align: center;
}

/* Monochrome mini portrait */
.hero-avatar {
  display: block;
  width: 112px;
  height: 112px;
  margin: 0 auto 1.75rem;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.hero-kicker {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.hero-name {
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.hero-role {
  margin-top: 0.75rem;
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  font-weight: 600;
  color: var(--text);
}

.hero-tagline {
  max-width: 34rem;
  margin: 1rem auto 0;
  color: var(--text-muted);
  font-size: 1.05rem;
}

.hero-actions {
  margin-top: 2rem;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- One-time entrance animation (on page load only, not scroll) ---------- */
.hero > * {
  opacity: 0;
  animation: rise 0.6s ease forwards;
}

.hero-avatar { animation-delay: 0s; }
.hero-kicker { animation-delay: 0.05s; }
.hero-name   { animation-delay: 0.15s; }
.hero-role   { animation-delay: 0.25s; }
.hero-tagline{ animation-delay: 0.35s; }
.hero-actions{ animation-delay: 0.45s; }

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-block;
  padding: 0.7rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease,
              background-color 0.2s ease, color 0.2s ease;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: var(--bg);
  color: var(--text);
  border-color: var(--border);
}

.btn-outline:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   Sections (shared)
   ========================================================================== */

.section {
  max-width: 1080px;
  margin: 0 auto;
  padding: 4.5rem 1.5rem;
  border-top: 1px solid var(--border);
}

.section-head {
  margin-bottom: 2.5rem;
}

.kicker {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.section-head h2 {
  font-size: clamp(1.7rem, 3.5vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  position: relative;
  padding-bottom: 0.9rem;
}

.section-head h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 48px;
  height: 3px;
  background: var(--border-strong);
}

.section-sub {
  margin-top: 1rem;
  color: var(--text-muted);
  max-width: 40rem;
}

.prose {
  max-width: 60rem;
  color: var(--text-muted);
}

.prose p + p {
  margin-top: 1rem;
}

/* ==========================================================================
   Stats (professional summary)
   ========================================================================== */

.stats {
  margin-top: 2.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
}

.stat {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.25rem;
  text-align: center;
  background: var(--bg);
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.stat:hover {
  transform: translateY(-3px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

.stat-value {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.stat-label {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Projects
   ========================================================================== */

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.project-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

/* Mock browser preview (pure CSS, no images needed) */
.project-preview {
  display: block;
  border-bottom: 1px solid var(--border);
}

.preview-bar {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  height: 30px;
  padding: 0 0.75rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.preview-bar i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #d9d9d9;
}

.preview-bar i:first-child { background: #e0c3c3; }
.preview-bar i:nth-child(2) { background: #d6d6b8; }
.preview-bar i:nth-child(3) { background: #c3e0c3; }

.preview-bar em {
  margin-left: 0.5rem;
  font-style: normal;
  font-size: 0.7rem;
  color: var(--text-muted);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.1rem 0.6rem;
}

.preview-body {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 50px;
  background: linear-gradient(135deg, #f7f7f7 0%, #ececec 100%);
  transition: background 0.3s ease;
}

.preview-body strong {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #9c9c9c;
  transition: color 0.3s ease, transform 0.3s ease;
}

.project-card:hover .preview-body {
  background: linear-gradient(135deg, #161616 0%, #3a3a3a 100%);
}

.project-card:hover .preview-body strong {
  color: #fff;
  transform: scale(1.04);
}

.project-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 1.25rem;
}

.project-title {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.project-desc {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  flex: 1;
}

.tags {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.chip {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.25rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-muted);
  background: var(--bg);
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.chip:hover {
  background: var(--border-strong);
  border-color: var(--border-strong);
  color: #fff;
}

.project-links {
  margin-top: 1.25rem;
  display: flex;
  gap: 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
}

.project-links a {
  position: relative;
  color: var(--text);
}

.project-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -3px;
  height: 2px;
  background: var(--border-strong);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.project-links a:hover::after {
  transform: scaleX(1);
}

/* ==========================================================================
   Timelines (experience & education)
   ========================================================================== */

.timeline {
  position: relative;
  padding-left: 2.5rem;
  max-width: 46rem;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0.5rem;
  bottom: 0.5rem;
  left: 0.5rem;
  width: 2px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  padding-bottom: 2.75rem;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

/* Dot on the line */
.timeline-item::before {
  content: "";
  position: absolute;
  top: 0.4rem;
  left: 0.125rem;
  width: 0.875rem;
  height: 0.875rem;
  border-radius: 50%;
  background: var(--border-strong);
  box-shadow: 0 0 0 2px var(--bg);
  transition: transform 0.25s ease;
}

.timeline-item:hover::before {
  transform: scale(1.25);
}

.timeline-date {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.15rem 0.7rem;
  margin-bottom: 0.75rem;
}

.timeline-title {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.timeline-place {
  margin-top: 0.15rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.timeline-desc {
  margin-top: 0.75rem;
  font-size: 0.925rem;
  color: var(--text-muted);
}

.timeline-desc li {
  position: relative;
  padding-left: 1.1rem;
  margin-top: 0.35rem;
}

.timeline-desc li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--text);
}

/* ==========================================================================
   Technical skills
   ========================================================================== */

.skill-groups {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
}

.skill-group-title {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.9rem;
}

/* ==========================================================================
   Languages I learnt (programming) — bars
   ========================================================================== */

.lang-list {
  max-width: 46rem;
  display: grid;
  gap: 1.25rem;
}

.lang-top {
  display: flex;
  justify-content: space-between;
  font-size: 0.925rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
}

.lang-top span:last-child {
  color: var(--text-muted);
  font-weight: 400;
}

.bar {
  height: 6px;
  border-radius: 999px;
  background: var(--border);
  overflow: hidden;
}

.bar-fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: var(--border-strong);
}

/* ==========================================================================
   Speaking languages
   ========================================================================== */

.speak-list {
  max-width: 46rem;
  display: grid;
  gap: 0.75rem;
}

.speak-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.speak-row:hover {
  transform: translateX(4px);
  border-color: var(--border-strong);
}

.speak-name {
  font-weight: 600;
}

.level-tag {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 0.2rem 0.8rem;
}

/* ==========================================================================
   Hobbies
   ========================================================================== */

.hobby-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.25rem;
}

.hobby-card {
  display: block;
  padding: 1.75rem 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.hobby-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

.hobby-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  font-size: 1.3rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  margin-bottom: 1rem;
}

.hobby-title {
  font-size: 1rem;
  font-weight: 600;
}

.hobby-desc {
  margin-top: 0.35rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Contact
   ========================================================================== */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 3rem;
  align-items: start;
}

.contact-info {
  display: grid;
  gap: 1.5rem;
}

.contact-row {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
}

.contact-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
}

.contact-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.15rem;
}

.contact-value {
  font-size: 0.95rem;
  font-weight: 500;
  word-break: break-word;
  position: relative;
}

.contact-row a.contact-value::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--border-strong);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.contact-row a.contact-value:hover::after {
  transform: scaleX(1);
}

/* ---------- Contact form ---------- */

.contact-form {
  display: grid;
  gap: 1.1rem;
  padding: 1.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.form-group {
  display: grid;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
}

.form-group input,
.form-group textarea {
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.7rem 0.9rem;
  resize: vertical;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #a8a8a8;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--border-strong);
  box-shadow: 0 0 0 3px rgba(22, 22, 22, 0.08);
}

.contact-form .btn {
  justify-self: start;
  margin-top: 0.25rem;
}

.contact-form .btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* ---------- Form success message ---------- */

.form-success {
  display: none;
  padding: 2.5rem 2rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  text-align: center;
}

.form-success.visible {
  display: block;
  animation: fadeUp 0.4s ease forwards;
}

.form-success-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--border-strong);
  color: #fff;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.form-success h3 {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
}

.form-success p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.form-success-btn {
  margin-top: 1.25rem;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  max-width: 1080px;
  margin: 0 auto;
  padding: 2rem 1.5rem 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  border-top: 1px solid var(--border);
  font-size: 0.875rem;
  color: var(--text-muted);
}

.back-to-top {
  font-weight: 600;
  color: var(--text);
  transition: opacity 0.2s ease;
}

.back-to-top:hover {
  opacity: 0.6;
}

/* ==========================================================================
   Certifications & lightbox
   ========================================================================== */

body.no-scroll {
  overflow: hidden;
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.cert-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.cert-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

.cert-thumb {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  border: none;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  cursor: zoom-in;
  overflow: hidden;
}

.cert-thumb img {
  width: 100%;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.cert-card:hover .cert-thumb img {
  transform: scale(1.04);
}

.cert-zoom {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(22, 22, 22, 0.35);
  color: #fff;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.cert-thumb:hover .cert-zoom,
.cert-thumb:focus-visible .cert-zoom {
  opacity: 1;
}

.cert-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 1.25rem;
}

.cert-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.cert-title {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.cert-issuer {
  margin-top: 0.3rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.cert-actions {
  margin-top: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.btn-sm {
  padding: 0.5rem 1.1rem;
  font-size: 0.85rem;
}

/* ---------- Lightbox ---------- */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.lightbox.open {
  opacity: 1;
  visibility: visible;
}

.lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 15, 15, 0.88);
}

.lightbox-btn {
  position: absolute;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, opacity 0.2s ease;
}

.lightbox-btn:hover {
  background: #fff;
  border-color: #fff;
  color: var(--text);
}

.lightbox-btn:disabled {
  opacity: 0.35;
  cursor: default;
}

.lightbox-btn:disabled:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.25);
  color: #fff;
}

.lightbox-close {
  top: 1.25rem;
  right: 1.5rem;
}

.lightbox-prev {
  left: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
}

.lightbox-next {
  right: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
}

.lightbox-stage {
  position: relative;
  z-index: 1;
  max-width: min(90vw, 920px);
  max-height: 84vh;
  margin: 0 5rem;
  text-align: center;
}

.lightbox-stage img {
  display: block;
  max-width: 100%;
  max-height: 74vh;
  margin: 0 auto;
  object-fit: contain;
  background: #fff;
  border-radius: 6px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.55);
}

.lightbox-caption {
  margin-top: 1rem;
  color: #fff;
  font-size: 0.925rem;
  font-weight: 500;
}

.lightbox-caption .lightbox-pdf {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.lightbox-caption .lightbox-pdf:hover {
  opacity: 0.8;
}

@media (max-width: 520px) {
  .lightbox-stage {
    margin: 0 2.75rem;
  }

  .lightbox-close {
    top: 0.9rem;
    right: 1rem;
  }

  .lightbox-prev {
    left: 0.9rem;
  }

  .lightbox-next {
    right: 0.9rem;
  }
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 820px) {
  html {
    /* Header becomes a taller two-row column on mobile */
    scroll-padding-top: 110px;
  }

  .header-inner {
    height: auto;
    padding: 0.75rem 1.5rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .site-nav {
    justify-content: flex-start;
    width: 100%;
  }

  .hero {
    padding-top: 4.5rem;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 480px) {
  html {
    /* Nav can wrap to two rows on very small screens */
    scroll-padding-top: 140px;
  }

  .section {
    padding: 3.5rem 1.25rem;
  }

  .hero {
    padding: 3.5rem 1.25rem 3rem;
  }

  .site-nav a {
    padding: 0.35rem 0.55rem;
    font-size: 0.8rem;
  }

  .preview-body {
    height: 110px;
  }
}

/* ==========================================================================
   Reduced motion — honour user preference
   ========================================================================== */

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .hero > * {
    opacity: 1;
  }
}