/* ==========================================================================
   Instituto Triângulo Tech — estilos globais
   Design: dark, minimalista, acento teal (#4FD1C5)
   ========================================================================== */

:root {
  --bg: #0b0e11;
  --bg-raised: #12161a;
  --bg-card: #14181d;
  --border: #232a31;
  --text: #e7ecef;
  --text-muted: #9aa4ae;
  --text-faint: #626c76;
  --accent: #4fd1c5;
  --accent-dim: #2f7d76;
  --accent-glow: rgba(79, 209, 197, 0.15);
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --radius: 6px;
  --max-width: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

h1, h2, h3, h4 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 0 0 0.6em;
}

h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.5rem, 3.2vw, 2.1rem); }
h3 { font-size: 1.25rem; }

p { margin: 0 0 1.2em; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1em;
}

.mono { font-family: var(--font-mono); }

.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;
}

.text-muted { color: var(--text-muted); }

.badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid var(--accent-dim);
  border-radius: 999px;
  padding: 0.25em 0.8em;
}

.badge.status-prep {
  color: #e0b25a;
  background: rgba(224, 178, 90, 0.12);
  border-color: rgba(224, 178, 90, 0.4);
}

/* ---------- Header ---------- */

.site-header {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(11, 14, 17, 0.85);
  backdrop-filter: blur(8px);
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-top: 16px;
  padding-bottom: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo:hover { text-decoration: none; }

.logo svg { display: block; }

.logo-text {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  letter-spacing: 0.02em;
}

.main-nav {
  display: flex;
  gap: 28px;
  flex: 1;
  justify-content: center;
}

.main-nav a {
  color: var(--text-muted);
  font-size: 0.94rem;
  white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--text);
  text-decoration: none;
}

.main-nav a.active {
  color: var(--accent);
}

.lang-toggle {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  flex-shrink: 0;
}

.lang-btn {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  background: transparent;
  color: var(--text-muted);
  border: none;
  padding: 6px 12px;
  cursor: pointer;
}

.lang-btn.active {
  background: var(--accent);
  color: #04211f;
  font-weight: 700;
}

.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius);
  font-size: 1.1rem;
  padding: 4px 10px;
  cursor: pointer;
}

/* ---------- Hero ---------- */

.hero {
  padding: 96px 0 72px;
  border-bottom: 1px solid var(--border);
}

.hero h1 {
  max-width: 16ch;
}

.manifesto {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 62ch;
  margin-top: 1.4em;
}

/* ---------- Sections ---------- */

.section {
  padding: 72px 0;
  border-bottom: 1px solid var(--border);
}

.section:last-of-type { border-bottom: none; }

.section-head {
  max-width: 62ch;
  margin-bottom: 2.4em;
}

/* ---------- Axis cards / grid ---------- */

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

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.15s ease;
}

.card:hover {
  border-color: var(--accent-dim);
}

.card .card-index {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.85rem;
  margin-bottom: 0.8em;
  display: block;
}

.card h3 { margin-bottom: 0.5em; }

.card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1em;
}

.card .card-link {
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

/* ---------- Research detail blocks ---------- */

.axis-block {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 32px;
  padding: 40px 0;
  border-bottom: 1px solid var(--border);
}

.axis-block:last-child { border-bottom: none; }

.axis-block .axis-label {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.axis-block h3 { margin-top: 0.2em; }

.future-list {
  display: grid;
  gap: 20px;
  margin-top: 1.6em;
}

.future-item {
  border-left: 2px solid var(--accent-dim);
  padding: 4px 0 4px 20px;
}

.future-item h4 {
  margin-bottom: 0.3em;
  font-size: 1.05rem;
}

.future-item p {
  color: var(--text-muted);
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* ---------- Publications ---------- */

.pub-layers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 3em;
}

.pub-layer {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.pub-layer h3 {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent);
}

.pub-list {
  display: grid;
  gap: 16px;
}

.pub-card {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 26px;
  flex-wrap: wrap;
}

.pub-card .pub-id {
  font-family: var(--font-mono);
  color: var(--text-faint);
  font-size: 0.78rem;
  display: block;
  margin-bottom: 0.4em;
}

.pub-card h4 {
  margin: 0 0 0.5em;
  font-size: 1.05rem;
  max-width: 46ch;
}

.pub-card .pub-meta {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

/* ---------- Notes empty state ---------- */

.empty-state {
  text-align: center;
  padding: 88px 24px;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
}

.empty-state .eyebrow { margin-bottom: 0.4em; }

/* ---------- About ---------- */

.about-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  align-items: start;
}

.avatar-placeholder {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius);
  border: 1px dashed var(--border);
  background: var(--bg-raised);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-align: center;
  padding: 16px;
}

.social-links {
  display: flex;
  gap: 14px;
  margin-top: 20px;
}

.social-links a {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 14px;
}

.social-links a:hover {
  color: var(--accent);
  border-color: var(--accent-dim);
  text-decoration: none;
}

.solo-note {
  margin-top: 2em;
  padding: 20px 24px;
  border-left: 2px solid var(--accent);
  background: var(--accent-glow);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 0.95rem;
}

/* ---------- Transparency ---------- */

.transparency-block {
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
}

.transparency-block:last-child { border-bottom: none; }

.transparency-block h3 {
  display: flex;
  align-items: center;
  gap: 10px;
}

.status-honest {
  background: var(--bg-card);
  border: 1px solid var(--accent-dim);
  border-radius: var(--radius);
  padding: 24px 28px;
}

/* ---------- Email capture ---------- */

.capture {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 44px;
  text-align: center;
}

.capture h2 { margin-bottom: 0.3em; }

.capture p {
  color: var(--text-muted);
  max-width: 50ch;
  margin: 0 auto 1.6em;
}

.capture-form {
  display: flex;
  justify-content: center;
  gap: 10px;
  max-width: 460px;
  margin: 0 auto;
  flex-wrap: wrap;
}

.capture-form input[type="email"] {
  flex: 1;
  min-width: 220px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.95rem;
}

.capture-form input[type="email"]:focus {
  outline: none;
  border-color: var(--accent);
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: #04211f;
  font-weight: 700;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  border: none;
  border-radius: var(--radius);
  padding: 12px 22px;
  cursor: pointer;
}

.btn:hover {
  background: #6bdbd0;
  text-decoration: none;
}

.form-note {
  font-size: 0.78rem;
  color: var(--text-faint);
  margin-top: 1em;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 48px 0;
  margin-top: 40px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-brand strong {
  display: block;
  font-family: var(--font-mono);
  margin-bottom: 4px;
}

.footer-brand span {
  color: var(--text-faint);
  font-size: 0.85rem;
}

.footer-nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.footer-nav a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-meta {
  display: flex;
  gap: 18px;
  align-items: center;
  color: var(--text-faint);
  font-size: 0.85rem;
  flex-wrap: wrap;
}

/* ---------- Page header (non-home) ---------- */

.page-hero {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--border);
}

.page-hero p {
  max-width: 62ch;
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  .grid { grid-template-columns: 1fr; }
  .axis-block { grid-template-columns: 1fr; gap: 8px; }
  .pub-layers { grid-template-columns: 1fr; }
  .about-layout { grid-template-columns: 1fr; }
  .avatar-placeholder { max-width: 220px; }
}

@media (max-width: 720px) {
  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 24px;
    gap: 14px;
    display: none;
  }
  .main-nav.open { display: flex; }
  .mobile-menu-toggle { display: inline-block; }
  .header-inner { flex-wrap: wrap; }
}