/* ============================================================
   Sistema de design — Portfolio de Desenvolvimento Educacional
   Direção: profissional + jovem. Neutro quente, accent lima,
   tipografia em camadas: serif display + sans corpo + mono.
   ============================================================ */

@import url("https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap");

:root {
  /* Paleta — neutros quentes, alto contraste, accent lima vibrante */
  --bg: #F4F1EA;            /* off-white quente */
  --bg-elev: #FBF9F3;       /* surface levemente mais clara */
  --paper: #FFFFFF;
  --ink: #14140F;           /* preto verdoso muito sutil */
  --ink-2: #2C2C24;
  --ink-3: #565649;
  --ink-4: #8A8A78;
  --line: #E1DCCE;
  --line-2: #CFC8B5;

  --accent: #C9F25C;        /* lima vibrante, jovem */
  --accent-ink: #14140F;
  --accent-deep: #84A828;

  --warn: #E8553C;
  --info: #2E5BFF;

  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 36px;

  --shadow-sm: 0 1px 2px rgba(20, 20, 15, 0.04), 0 1px 0 rgba(20, 20, 15, 0.03);
  --shadow-md: 0 8px 24px -12px rgba(20, 20, 15, 0.18), 0 2px 6px rgba(20, 20, 15, 0.04);
  --shadow-lg: 0 30px 60px -30px rgba(20, 20, 15, 0.35);

  --font-serif: "Instrument Serif", "Times New Roman", serif;
  --font-sans: "Inter", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", monospace;

  --max: 1200px;
  --gutter: clamp(20px, 4vw, 56px);

  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* Tema escuro (acessibilidade + tweak) */
[data-theme="dark"] {
  --bg: #0E0F0B;
  --bg-elev: #15170F;
  --paper: #1B1D14;
  --ink: #F4F1EA;
  --ink-2: #DAD6C5;
  --ink-3: #ADA992;
  --ink-4: #6E6B58;
  --line: #2A2C20;
  --line-2: #3D4030;
}

/* Reset essencial */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: inherit;
  text-decoration: none;
  text-underline-offset: 3px;
}

button {
  font: inherit;
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection { background: var(--accent); color: var(--accent-ink); }

/* ============== Layout primitives ============== */

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

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  display: inline-block;
}

.divider {
  height: 1px;
  background: var(--line);
  border: 0;
  margin: 0;
}

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

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--bg) 85%, transparent);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 24px;
}

.nav-inner nav {
  margin-left: auto;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-serif);
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--ink);
  white-space: nowrap;
  flex-shrink: 0;
}
.brand .brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px; height: 28px;
  background: var(--ink);
  color: var(--accent);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  transform: translateY(0);
}
.brand i {
  font-style: italic;
  color: var(--ink-3);
  font-size: 18px;
}

.nav-links {
  display: flex;
  gap: 4px;
  list-style: none;
  margin: 0; padding: 0;
}
.nav-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  color: var(--ink-3);
  font-size: 13.5px;
  font-weight: 500;
  transition: color 160ms var(--ease), background 160ms var(--ease);
}
.nav-links a:hover { color: var(--ink); background: var(--bg-elev); }
.nav-links a[aria-current="page"] {
  color: var(--ink);
  background: var(--bg-elev);
}
.nav-links a[aria-current="page"]::before {
  content: "";
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
}
.nav-links .num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-4);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--ink);
  color: var(--bg);
  border: 0;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  flex-shrink: 0;
  transition: transform 160ms var(--ease), background 160ms var(--ease);
}
.nav-cta:hover { transform: translateY(-1px); }

.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--line);
  padding: 8px 12px;
  border-radius: 999px;
  color: var(--ink);
}

/* ============== Type ============== */

h1, h2, h3, h4 {
  margin: 0;
  color: var(--ink);
  letter-spacing: -0.015em;
}
h1 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(48px, 7vw, 104px);
  line-height: 0.98;
  letter-spacing: -0.02em;
}
h1 em { font-style: italic; color: var(--ink-2); }
h1 .accent {
  background-image: linear-gradient(transparent 62%, var(--accent) 62%);
  background-repeat: no-repeat;
  background-size: 100% 100%;
  padding: 0 0.06em;
  border-radius: 2px;
  font-style: italic;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}

h2 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(32px, 4vw, 56px);
  line-height: 1.05;
}
h2 em { font-style: italic; color: var(--ink-3); }

h3 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 19px;
  line-height: 1.3;
  letter-spacing: -0.005em;
}

h4 {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
}

p { margin: 0 0 1em; color: var(--ink-2); max-width: 64ch; }
.lede { font-size: clamp(18px, 1.6vw, 22px); line-height: 1.5; color: var(--ink-2); max-width: 50ch; }
small, .small { font-size: 12.5px; color: var(--ink-3); }

/* ============== Page sections ============== */

.section {
  padding: clamp(72px, 10vw, 140px) 0;
}
.section--tight { padding: clamp(48px, 6vw, 80px) 0; }
.section--ink { background: var(--ink); color: var(--bg); }
.section--ink h1, .section--ink h2, .section--ink h3 { color: var(--bg); }
.section--ink p { color: color-mix(in oklab, var(--bg) 85%, var(--ink)); }
.section--paper { background: var(--paper); }

/* ============== Hero (homepage) ============== */

.hero {
  padding: clamp(48px, 8vw, 120px) 0 clamp(56px, 7vw, 96px);
  position: relative;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}
.hero-meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 20px 0;
}
.hero-meta > div {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--ink-3);
}
.hero-meta strong {
  display: block;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 13.5px;
  color: var(--ink);
  margin-top: 4px;
  letter-spacing: 0;
  text-transform: none;
}

/* ============== Pillar grid ============== */

.pillars {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
}
.pillar-card {
  grid-column: span 12;
  display: grid;
  grid-template-columns: 80px 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
  position: relative;
  text-decoration: none;
  color: var(--ink);
  transition: padding 220ms var(--ease);
}
.pillar-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--bg-elev);
  z-index: -1;
  opacity: 0;
  transition: opacity 220ms var(--ease);
}
.pillar-card:hover::after { opacity: 1; }
.pillar-card:hover { padding-left: 16px; padding-right: 16px; }
.pillar-card:hover .pillar-arrow { transform: translateX(6px); }

.pillar-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-3);
  letter-spacing: 0.05em;
}
.pillar-body h3 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}
.pillar-body p {
  margin: 0;
  font-size: 15px;
  color: var(--ink-3);
  max-width: 60ch;
}
.pillar-arrow {
  width: 44px; height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  transition: transform 220ms var(--ease), background 220ms var(--ease), border-color 220ms var(--ease);
}
.pillar-card:hover .pillar-arrow {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--accent);
}
.pillar-arrow svg { width: 18px; height: 18px; }

/* ============== Block / cards system ============== */

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: transform 180ms var(--ease), box-shadow 180ms var(--ease);
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.card .num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-4);
  letter-spacing: 0.1em;
}
.card h3 { margin-top: 14px; }
.card p { margin-top: 8px; font-size: 14.5px; color: var(--ink-3); }

/* ============== Intro / lede block ============== */

.intro {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 48px;
  padding: clamp(56px, 8vw, 100px) 0;
  border-bottom: 1px solid var(--line);
}
.intro h2 { font-size: clamp(36px, 4.5vw, 60px); }
.intro p { font-size: 17px; line-height: 1.55; color: var(--ink-2); }

/* ============== Pillar page hero ============== */

.pillar-hero {
  padding: clamp(56px, 9vw, 120px) 0 clamp(40px, 6vw, 72px);
}
.pillar-hero .meta {
  display: flex;
  gap: 24px;
  align-items: baseline;
  margin-bottom: 32px;
}
.pillar-hero .index-pill {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--accent);
}
.pillar-hero h1 {
  font-size: clamp(56px, 9vw, 140px);
}
.pillar-hero .lede { margin-top: 24px; max-width: 56ch; }

/* ============== Two-column section ============== */

.split {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: clamp(32px, 5vw, 80px);
  padding: clamp(48px, 7vw, 96px) 0;
  border-top: 1px solid var(--line);
}
.split .label {
  position: sticky;
  top: 100px;
  align-self: start;
}
.split .label h2 { font-size: clamp(28px, 3.2vw, 40px); }
.split .label .eyebrow { margin-bottom: 12px; }

/* List of practices */
.practices {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}
.practice {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}
.practice:last-child { border-bottom: 0; }
.practice .pn {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-4);
  padding-top: 4px;
}
.practice h3 { margin-bottom: 6px; }
.practice p { margin: 0; font-size: 15px; color: var(--ink-3); max-width: 60ch; }

/* Concept tags */
.concepts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.concept {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  transition: border-color 180ms var(--ease);
}
.concept:hover { border-color: var(--ink); }
.concept .name {
  font-family: var(--font-serif);
  font-size: 22px;
  font-style: italic;
  color: var(--ink);
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}
.concept .desc { font-size: 14px; color: var(--ink-3); }

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

.foot {
  background: var(--ink);
  color: var(--bg);
  padding: 80px 0 32px;
  margin-top: 80px;
}
.foot h2 {
  color: var(--bg);
  font-size: clamp(40px, 6vw, 88px);
  max-width: 18ch;
  margin-bottom: 32px;
}
.foot h2 .accent { background: var(--accent); color: var(--accent-ink); padding: 0 0.1em; border-radius: 6px; }
.foot-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-top: 56px;
  border-top: 1px solid color-mix(in oklab, var(--bg) 18%, var(--ink));
}
.foot-grid h4 { color: color-mix(in oklab, var(--bg) 60%, var(--ink)); margin-bottom: 12px; }
.foot ul { list-style: none; margin: 0; padding: 0; }
.foot li { padding: 6px 0; font-size: 14px; color: color-mix(in oklab, var(--bg) 80%, var(--ink)); }
.foot li a:hover { color: var(--accent); }
.foot-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid color-mix(in oklab, var(--bg) 18%, var(--ink));
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: color-mix(in oklab, var(--bg) 60%, var(--ink));
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--bg);
  transition: transform 160ms var(--ease), background 160ms var(--ease), color 160ms var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--bg); }
.btn--accent { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

.btn-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }

/* ============== Marquee / running line ============== */

.marquee {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
  overflow: hidden;
  white-space: nowrap;
  font-family: var(--font-serif);
  font-size: clamp(28px, 4vw, 56px);
  font-style: italic;
  letter-spacing: -0.02em;
  color: var(--ink-3);
}
.marquee-track {
  display: inline-flex;
  gap: 48px;
  animation: marquee 38s linear infinite;
}
.marquee-track span { display: inline-flex; align-items: center; gap: 48px; }
.marquee-track .dot {
  display: inline-block;
  width: 10px; height: 10px;
  background: var(--accent);
  border-radius: 50%;
  vertical-align: middle;
}
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ============== Misc utilities ============== */

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  background: var(--bg-elev);
}
.kicker .dot {
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

.callout {
  background: var(--accent);
  color: var(--accent-ink);
  border-radius: var(--radius-lg);
  padding: 32px;
}
.callout .eyebrow { color: rgba(20,20,15,0.7); }
.callout .eyebrow::before { background: var(--ink); }

/* Tag pill list */
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
.tag-list li {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 6px 12px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink-2);
}

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

@media (max-width: 1180px) {
  .brand i { display: none; }
  .nav-links a { padding: 8px 10px; font-size: 13px; }
  .nav-links { gap: 0; }
}

@media (max-width: 960px) {
  .hero-meta { grid-template-columns: repeat(2, 1fr); }
  .grid-2, .grid-3, .concepts { grid-template-columns: 1fr; }
  .intro { grid-template-columns: 1fr; gap: 24px; }
  .split { grid-template-columns: 1fr; gap: 24px; }
  .split .label { position: static; }
  .pillar-card { grid-template-columns: 60px 1fr 44px; padding: 22px 0; gap: 16px; }
  .foot-grid { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 720px) {
  .nav-links { display: none; }
  .menu-toggle { display: inline-flex; }
  .nav-cta { display: inline-flex; }
  .nav.open .nav-links {
    display: flex;
    position: absolute;
    top: 68px; left: 0; right: 0;
    flex-direction: column;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: 12px var(--gutter);
    align-items: stretch;
  }
  .nav.open .nav-links a { padding: 12px; border-radius: 12px; }
}