/* =========================================================
   Isaac Brasil — folha de estilos
   1. Variáveis (cores, fontes, espaçamentos)
   2. Base
   3. Componentes (botões, cabeçalho, cartões…)
   4. Seções
   5. Responsividade e movimento
   ========================================================= */

/* ---------- 1. Variáveis ---------- */
:root {
  --navy-900: #0b1a31;
  --navy-800: #0f2340;
  --navy-700: #1a3358;
  --navy-100: #e6ebf2;
  --accent: #0f7c82;        /* turquesa — contraste AA sobre fundos claros */
  --accent-light: #6fd0d4;  /* turquesa claro — usado sobre o azul-marinho */
  --accent-soft: #e2f3f3;
  --bg: #f8f7f3;            /* off-white */
  --bg-tint: #eff1f3;
  --surface: #ffffff;
  --text: #16202e;
  --text-muted: #555f6d;
  --line: #d9dde3;

  --font-head: "Manrope", "Segoe UI", system-ui, sans-serif;
  --font-body: "Source Sans 3", "Segoe UI", system-ui, sans-serif;

  --radius: 6px;
  --container: 1160px;
  --gutter: clamp(16px, 4vw, 40px);
  --section-y: clamp(72px, 10vw, 128px);
}

/* ---------- 2. Base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-head);
  color: var(--navy-800);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 0.6em;
}
h1 { font-size: clamp(2.3rem, 4.8vw, 3.9rem); font-weight: 800; letter-spacing: -0.035em; }
h2 { font-size: clamp(1.85rem, 3.6vw, 2.75rem); font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 700; letter-spacing: -0.01em; }

p { margin: 0 0 1em; }
a { color: var(--accent); text-underline-offset: 3px; }
img { max-width: 100%; display: block; }
[hidden] { display: none !important; }
ul, ol { padding: 0; margin: 0; }

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

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: 16px; top: -60px;
  z-index: 100;
  background: var(--navy-800);
  color: #fff;
  padding: 10px 16px;
  border-radius: var(--radius);
  font-weight: 600;
}
.skip-link:focus { top: 12px; }

/* ---------- 3. Componentes ---------- */

/* Botões */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 12px 24px;
  border: 2px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-head);
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background-color .2s, color .2s, border-color .2s, transform .2s;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--navy-800); color: #fff; }
.btn-primary:hover { background: var(--navy-700); }
.btn-outline { background: transparent; color: var(--navy-800); border-color: var(--navy-800); }
.btn-outline:hover { background: var(--navy-800); color: #fff; }
.btn-small {
  min-height: 44px;
  padding: 10px 18px;
  font-size: 0.92rem;
  background: transparent;
  color: var(--navy-800);
  border-color: var(--line);
}
.btn-small:hover { border-color: var(--navy-800); background: var(--navy-800); color: #fff; }

.text-link { font-weight: 600; color: var(--navy-800); }
.text-link:hover { color: var(--accent); }

/* Cabeçalho */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(248, 247, 243, 0.92);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}
.site-header.is-scrolled { border-bottom-color: var(--line); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--navy-800);
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px; height: 38px;
  border-radius: var(--radius);
  background: var(--navy-800);
  color: #fff;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
}
.brand-name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}
.site-nav a {
  display: block;
  padding: 10px 12px;
  color: var(--text);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border-radius: var(--radius);
}
.site-nav a:hover { color: var(--accent); }
.site-nav a.is-active { color: var(--accent); }
.site-nav .nav-cta {
  margin-left: 8px;
  background: var(--navy-800);
  color: #fff;
  padding: 10px 18px;
}
.site-nav .nav-cta:hover,
.site-nav .nav-cta.is-active { background: var(--navy-700); color: #fff; }

.nav-toggle {
  display: none;
  width: 48px; height: 48px;
  border: 0;
  background: transparent;
  border-radius: var(--radius);
  cursor: pointer;
  position: relative;
}
.nav-toggle-bar,
.nav-toggle-bar::before,
.nav-toggle-bar::after {
  position: absolute;
  left: 13px;
  width: 22px; height: 2px;
  background: var(--navy-800);
  content: "";
  transition: transform .25s, opacity .2s;
}
.nav-toggle-bar { top: 23px; }
.nav-toggle-bar::before { left: 0; top: -7px; }
.nav-toggle-bar::after { left: 0; top: 7px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::before { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::after { transform: translateY(-7px) rotate(-45deg); }

/* Cabeçalhos de seção */
.section { padding: var(--section-y) 0; }
.section-tinted { background: var(--bg-tint); }

.section-index {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  font-family: var(--font-head);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}
.section-index span {
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}
.section-index::after {
  content: "";
  width: 40px; height: 1px;
  background: currentColor;
  opacity: .5;
}

.section-head-wide { max-width: 780px; margin-bottom: clamp(40px, 6vw, 64px); }
.section-intro { color: var(--text-muted); font-size: 1.15rem; }

.eyebrow {
  font-family: var(--font-head);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 24px;
}

.lead {
  font-size: 1.3rem;
  line-height: 1.55;
  color: var(--navy-800);
}

.card-tag {
  font-family: var(--font-head);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

/* ---------- 4. Seções ---------- */

/* A — Início */
.hero { padding: clamp(48px, 8vw, 96px) 0 0; }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
  gap: clamp(40px, 6vw, 88px);
  align-items: center;
}
.hero h1 { max-width: 19ch; margin-bottom: 28px; }
.hero-lead {
  font-size: clamp(1.15rem, 1.8vw, 1.35rem);
  line-height: 1.6;
  color: var(--text-muted);
  max-width: 38em;
  margin-bottom: 36px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 32px; }

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.95rem;
}
.hero-links a {
  color: var(--navy-800);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
}
.hero-links a::after { content: " ↗"; color: var(--accent); }
.hero-links a:hover { border-color: var(--accent); color: var(--accent); }

.hero-portrait { margin: 0; justify-self: end; width: 100%; max-width: 400px; }
.portrait-frame {
  position: relative;
  aspect-ratio: 4 / 5;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--navy-800);
}
.portrait-frame::after {         /* linha editorial deslocada */
  content: "";
  position: absolute;
  inset: 14px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 3px;
  pointer-events: none;
}
.portrait-frame img { width: 100%; height: 100%; object-fit: cover; }
.portrait-placeholder {
  width: 100%; height: 100%;
  display: grid;
  place-items: center;
  background:
    linear-gradient(160deg, var(--navy-700) 0%, var(--navy-900) 100%);
}
.portrait-placeholder span {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(4rem, 9vw, 6.5rem);
  letter-spacing: -0.04em;
  color: rgba(255, 255, 255, 0.92);
}
.hero-portrait figcaption {
  display: flex;
  flex-direction: column;
  padding: 16px 2px 0;
  font-size: 0.95rem;
  line-height: 1.4;
}
.hero-portrait figcaption strong { font-family: var(--font-head); color: var(--navy-800); }
.hero-portrait figcaption span { color: var(--text-muted); }

.topic-strip {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin-top: clamp(56px, 8vw, 96px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.topic-strip li {
  flex: 1 1 auto;
  padding: 18px 20px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--navy-800);
  text-align: center;
  border-left: 1px solid var(--line);
}
.topic-strip li:first-child { border-left: 0; }

/* B — Sobre */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  grid-template-areas:
    "head head"
    "body facts";
  gap: 16px clamp(40px, 6vw, 88px);
}
.about-grid > .section-head { grid-area: head; max-width: 780px; }
.about-body { grid-area: body; }
.about-body p:not(.lead) { color: var(--text); }
.about-body .btn { margin-top: 12px; }

.about-facts {
  grid-area: facts;
  align-self: start;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
}
.about-facts h3 {
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.about-facts h3:not(:first-child) { margin-top: 32px; }

.timeline { list-style: none; position: relative; }
.timeline li {
  position: relative;
  padding: 0 0 18px 24px;
  display: flex;
  flex-direction: column;
  line-height: 1.4;
}
.timeline li::before {
  content: "";
  position: absolute;
  left: 0; top: 7px;
  width: 9px; height: 9px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: var(--surface);
}
.timeline li:first-child::before { background: var(--accent); }
.timeline li:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 4px; top: 20px; bottom: 2px;
  width: 1px;
  background: var(--line);
}
.t-label { font-family: var(--font-head); font-weight: 700; font-size: 0.98rem; color: var(--navy-800); }
.t-desc { color: var(--text-muted); font-size: 0.98rem; }

.plain-list { list-style: none; }
.plain-list li {
  padding: 8px 0;
  border-top: 1px solid var(--line);
  font-size: 1rem;
}
.plain-list li:first-child { border-top: 0; padding-top: 0; }

/* C — Palestras */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 3px solid var(--navy-800);
  border-radius: var(--radius);
  padding: 32px 28px 28px;
  transition: border-color .2s, transform .2s;
}
.card:hover { border-top-color: var(--accent); }
.card h3 { font-size: 1.3rem; }
.card > p:not(.card-tag) { color: var(--text-muted); font-size: 1.05rem; }

.meta { margin: auto 0 24px; padding-top: 16px; }
.meta div { padding: 12px 0; border-top: 1px solid var(--line); }
.meta dt {
  font-family: var(--font-head);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--navy-800);
  margin-bottom: 2px;
}
.meta dd { margin: 0; font-size: 1rem; line-height: 1.5; }
.card .btn { align-self: flex-start; }

/* D — Oficinas */
.workshop-list { display: grid; gap: 24px; }
.workshop {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
  gap: clamp(24px, 4vw, 56px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(28px, 4vw, 44px);
}
.workshop-head h3 { font-size: 1.45rem; }
.workshop-head p:not(.card-tag) { color: var(--text-muted); }
.workshop-head .btn { margin-top: 8px; }

.workshop-details { margin: 0; }
.workshop-details > div {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 16px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}
.workshop-details > div:first-child { border-top: 0; padding-top: 0; }
.workshop-details dt {
  font-family: var(--font-head);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--navy-800);
  padding-top: 3px;
}
.workshop-details dd { margin: 0; font-size: 1.02rem; line-height: 1.55; }
.workshop-details ul { list-style: none; }
.workshop-details li { position: relative; padding-left: 18px; margin-bottom: 6px; }
.workshop-details li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.72em;
  width: 8px; height: 2px;
  background: var(--accent);
}

/* E — Como trabalho */
.section-dark { background: var(--navy-800); color: #dfe6ef; }
.section-dark h2, .section-dark h3 { color: #fff; }
.section-dark .section-index { color: var(--accent-light); }
.section-dark .section-index span { color: #a9b6c8; }
.section-dark .section-intro { color: #c3cedc; }

.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}
.step {
  position: relative;
  padding: 32px 28px 8px 0;
}
.step + .step { padding-left: 28px; border-left: 1px solid rgba(255, 255, 255, 0.18); }
.step-num {
  display: block;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 2.75rem;
  line-height: 1;
  color: var(--accent-light);
  margin-bottom: 20px;
}
.step h3 { font-size: 1.15rem; line-height: 1.3; }
.step p { color: #c3cedc; font-size: 1.02rem; }

.steps-note {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  color: #c3cedc;
  max-width: 760px;
}

/* F — Pesquisa */
.research-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
  gap: 16px clamp(40px, 6vw, 88px);
  align-items: start;
}
.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin-top: 24px;
}
.chip-list li {
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: #0b5c61;
  font-family: var(--font-head);
  font-size: 0.86rem;
  font-weight: 600;
}

.channel-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-top: clamp(40px, 6vw, 64px);
}
.channel {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
  transition: border-color .2s, transform .2s;
}
.channel:hover { border-color: var(--navy-800); transform: translateY(-2px); }
.channel-icon {
  width: 32px; height: 32px;
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  margin-bottom: 8px;
}
.channel-title { font-family: var(--font-head); font-weight: 700; font-size: 1.2rem; color: var(--navy-800); }
.channel-desc { color: var(--text-muted); font-size: 1rem; line-height: 1.5; flex: 1; }
.channel-cta { font-family: var(--font-head); font-weight: 700; font-size: 0.92rem; color: var(--accent); margin-top: 8px; }

/* G — Contato */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
  gap: clamp(40px, 6vw, 88px);
  align-items: start;
}
.contact-how {
  margin-top: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  font-size: 1.02rem;
}
.contact-how h3 { font-size: 1.05rem; }
.contact-how p { color: var(--text-muted); }

.contact-form {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(24px, 4vw, 40px);
}
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 20px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0 20px; }
.field label {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--navy-800);
}
.req { color: #b4232a; }
.optional { color: var(--text-muted); font-weight: 500; }

.field input,
.field select,
.field textarea {
  width: 100%;
  min-height: 48px;
  padding: 11px 14px;
  border: 1px solid #b9c0ca;
  border-radius: var(--radius);
  background: #fff;
  color: var(--text);
  font: inherit;
  font-size: 1rem;
  transition: border-color .2s, box-shadow .2s;
}
.field textarea { resize: vertical; min-height: 130px; line-height: 1.5; }
.field select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%230f2340' stroke-width='2'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; padding-right: 40px; }
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(15, 124, 130, 0.22);
}
.field [aria-invalid="true"] { border-color: #b4232a; }
.field-error { color: #b4232a; font-size: 0.9rem; }

.form-hint { color: var(--text-muted); font-size: 0.9rem; }
.form-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 8px; }

.form-status { min-height: 1.5em; margin-top: 16px; font-size: 0.98rem; }
.form-status.is-ok { color: #0b6b4a; }
.form-status.is-error { color: #b4232a; }

.preview { margin-top: 8px; font-size: 0.95rem; }
.preview summary { cursor: pointer; color: var(--navy-800); font-weight: 600; padding: 6px 0; }
.preview-text {
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--bg-tint);
  border-radius: var(--radius);
  padding: 16px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.55;
  margin: 8px 0 0;
}

.contact-flash { animation: flash 1.2s ease; }
@keyframes flash {
  0% { box-shadow: 0 0 0 0 rgba(15, 124, 130, 0.45); }
  100% { box-shadow: 0 0 0 14px rgba(15, 124, 130, 0); }
}

/* Rodapé */
.site-footer {
  background: var(--navy-900);
  color: #c3cedc;
  padding: 56px 0 32px;
  font-size: 1rem;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}
.footer-name { font-family: var(--font-head); font-weight: 800; font-size: 1.2rem; color: #fff; margin-bottom: 4px; }
.footer-desc { margin: 0; }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 28px; list-style: none; align-items: center; }
.footer-links a { color: #fff; text-decoration: none; font-weight: 600; }
.footer-links a:hover { color: var(--accent-light); text-decoration: underline; }
.footer-copy { margin: 24px 0 0; font-size: 0.92rem; color: #a9b6c8; }

/* ---------- 5. Responsividade e movimento ---------- */

/* Animação de entrada (ativada somente via JS) */
.js .reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 1040px) {
  .card-grid, .channel-grid { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .step:nth-child(3) { border-left: 0; padding-left: 0; }
  .step:nth-child(n+3) { border-top: 1px solid rgba(255, 255, 255, 0.18); margin-top: 8px; }
  .workshop { grid-template-columns: 1fr; }
}

@media (max-width: 880px) {
  .nav-toggle { display: block; }
  .site-nav {
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    display: none;
  }
  .site-nav.is-open { display: block; }
  .site-nav ul { flex-direction: column; align-items: stretch; padding: 8px var(--gutter) 20px; gap: 0; }
  .site-nav a { padding: 14px 4px; border-bottom: 1px solid var(--line); border-radius: 0; font-size: 1.05rem; }
  .site-nav .nav-cta { margin: 16px 0 0; text-align: center; border-radius: var(--radius); border: 0; }

  .hero-grid { grid-template-columns: 1fr; }
  .hero-portrait { justify-self: start; max-width: 320px; order: -1; }
  .hero-portrait { display: grid; grid-template-columns: 112px 1fr; gap: 16px; align-items: center; max-width: none; }
  .hero-portrait .portrait-frame { aspect-ratio: 1; }
  .hero-portrait .portrait-frame::after { inset: 6px; }
  .portrait-placeholder span { font-size: 2.4rem; }
  .hero-portrait figcaption { padding: 0; }

  .about-grid { grid-template-columns: 1fr; grid-template-areas: "head" "body" "facts"; }
  .research-grid, .contact-grid { grid-template-columns: 1fr; }
  .topic-strip li { flex: 1 1 33%; border-top: 1px solid var(--line); margin-top: -1px; }
}

@media (max-width: 640px) {
  body { font-size: 1.0625rem; }
  .card-grid, .channel-grid, .steps { grid-template-columns: 1fr; }
  .step, .step + .step { padding: 28px 0 8px; border-left: 0; }
  .step + .step { border-top: 1px solid rgba(255, 255, 255, 0.18); }
  .step:nth-child(n+3) { margin-top: 0; }
  .hero-actions .btn { width: 100%; }
  .field-row { grid-template-columns: 1fr; }
  .workshop-details > div { grid-template-columns: 1fr; gap: 4px; }
  .topic-strip li { flex: 1 1 50%; padding: 14px 10px; font-size: 0.85rem; }
  .topic-strip li:nth-child(odd) { border-left: 0; }
  .form-actions .btn { width: 100%; }
  .about-facts { padding: 24px; }
}

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

@media print {
  .site-header, .nav-toggle, .form-actions, .preview, .skip-link { display: none !important; }
  .section-dark, .site-footer { background: none; color: #000; }
  .section-dark h2, .section-dark h3 { color: #000; }
  .js .reveal { opacity: 1; transform: none; }
}