/* =========================================================
   ACONSTY — folha de estilo
   Estética: "blueprint técnico" — grade sutil, mono para
   detalhes, acento verde.
   ========================================================= */

/* ===== Fontes locais (Inter + Montserrat, variable) ===== */
@font-face {
  font-family: 'Inter';
  src: url('fonts/Inter.ttf') format('truetype-variations');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Montserrat';
  src: url('fonts/Montserrat.ttf') format('truetype-variations');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

:root {
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-display: 'Montserrat', 'Inter', sans-serif;
  --font-mono:    'Inter', ui-monospace, SFMono-Regular, monospace;

  --bg: #0c0e0d;
  --bg-elev: #141715;
  --surface: #161a18;
  --line: #262b28;
  --line-strong: #333a36;
  --ink: #e8ece9;
  --ink-soft: #a3aaa5;
  --ink-faint: #6b726d;
  --accent: #259261;
  --accent-deep: #218759;
  --accent-ink: #fbfbf8;
  --grid: rgba(255,255,255,0.025);
  --glow: rgba(198,242,78,0.10);
  --shadow: 0 20px 60px -20px rgba(0,0,0,0.6);
  color-scheme: dark;
}
[data-theme="light"] {
  --bg: #f4f3ee;
  --bg-elev: #fbfbf8;
  --surface: #fbfbf8;
  --line: #e0ddd2;
  --line-strong: #cbc7b8;
  --ink: #1c1f1b;
  --ink-soft: #565b53;
  --ink-faint: #8c8f85;
  --accent: #259261;
  --accent-deep: #218759;
  --accent-ink: #fbfbf8;
  --grid: rgba(0,0,0,0.03);
  --glow: rgba(91,124,18,0.10);
  --shadow: 0 20px 60px -24px rgba(40,42,30,0.22);
  color-scheme: light;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background .5s ease, color .5s ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 64px 64px;
  z-index: 0;
  pointer-events: none;
}
::selection { background: var(--accent); color: var(--accent-ink); }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.wrap { max-width: 880px; margin: 0 auto; padding: 0 32px; position: relative; z-index: 1; width: 100%; }
.page { flex: 1 0 auto; }

.mono {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* ---------- NAV ---------- */
nav {
  position: sticky;
  top: 0;
  z-index: 60;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}
.brand-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--glow);
}

.nav-tools {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* lang select */
.lang-select { position: relative; }
.lang-btn {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink);
  padding: 8px 12px;
  border-radius: 100px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body);
  font-size: .82rem;
  transition: border-color .2s, color .2s;
}
.lang-btn:hover { border-color: var(--line-strong); color: var(--ink); }
.lang-btn svg { width: 14px; height: 14px; }
.lang-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 6px;
  display: none;
  flex-direction: column;
  min-width: 160px;
  box-shadow: var(--shadow);
}
.lang-menu.open { display: flex; }
.lang-menu a {
  padding: 9px 12px;
  border-radius: 8px;
  font-size: .9rem;
  color: var(--ink-soft);
  transition: background .15s, color .15s;
}
.lang-menu a:hover { background: var(--surface); color: var(--ink); }
.lang-menu a.active { color: var(--accent); }

/* theme toggle */
.theme-toggle {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink);
  width: 36px; height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: border-color .2s, color .2s;
}
.theme-toggle:hover { border-color: var(--line-strong); }
.theme-toggle svg { width: 16px; height: 16px; }
[data-theme="light"] .theme-toggle .icon-sun  { display: none; }
[data-theme="light"] .theme-toggle .icon-moon { display: block; }
[data-theme="dark"]  .theme-toggle .icon-sun  { display: block; }
[data-theme="dark"]  .theme-toggle .icon-moon { display: none; }

/* ---------- PAGE HEAD ---------- */
.page-head {
  padding: 80px 0 24px;
}
.page-head .mono { display: block; margin-bottom: 16px; }
.page-head h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
  color: var(--ink);
}
.page-head p {
  font-size: 1.05rem;
  color: var(--ink-soft);
  max-width: 60ch;
}

/* ---------- SECTION ---------- */
section { padding: 32px 0 80px; }

/* ---------- BUTTONS ---------- */
.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: .95rem;
  padding: 15px 30px;
  border-radius: 100px;
  border: none;
  cursor: pointer;
  transition: transform .2s, box-shadow .2s;
  box-shadow: 0 8px 28px -8px var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  text-align: center;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 34px -8px var(--accent); }
.btn-primary:disabled { opacity: .6; cursor: not-allowed; transform: none; box-shadow: none; }

/* spinner */
.btn-spinner {
  width: 14px; height: 14px;
  border: 2px solid rgba(255,255,255,.4);
  border-top-color: #fff;
  border-radius: 50%;
  display: none;
  animation: spin .8s linear infinite;
}
.btn-primary.is-loading .btn-spinner { display: inline-block; }
.btn-primary.is-loading .btn-label   { opacity: .7; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- FORM ---------- */
form.contact-form {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 46px 42px;
}
.field { margin-bottom: 20px; }
.field .lbl {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  display: block;
  margin-bottom: 9px;
}
.field .lbl em {
  font-style: normal;
  color: var(--accent-deep);
  margin-left: 4px;
}
[data-theme="dark"] .field .lbl em { color: var(--accent); }
.field input,
.field select,
.field textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  padding: 13px 15px;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: .95rem;
  font-weight: 300;
  transition: border-color .2s, box-shadow .2s;
}
.field textarea { resize: vertical; min-height: 140px; }
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--glow);
}
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

/* captcha */
.captcha-field .captcha-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.captcha-q {
  font-family: var(--font-mono);
  font-size: .95rem;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  padding: 13px 16px;
  white-space: nowrap;
}
.captcha-row input[type="number"] {
  max-width: 140px;
}

/* submit + feedback */
.form-submit { margin-top: 6px; }
.form-feedback {
  margin-top: 16px;
  padding: 14px 17px;
  border-radius: 9px;
  font-size: .9rem;
  display: none;
}
.form-feedback:not(:empty) { display: block; }
.form-feedback-ok {
  border: 1px solid var(--accent);
  background: var(--glow);
  color: var(--ink);
}
.form-feedback-err {
  border: 1px solid #e0563f;
  background: rgba(224,86,63,.1);
  color: var(--ink);
}
.form-note {
  font-size: .78rem;
  color: var(--ink-faint);
  max-width: 44ch;
  margin-top: 14px;
}

/* ---------- FOOTER ---------- */
footer {
  border-top: 1px solid var(--line);
  background: var(--bg-elev);
  padding: 28px 0;
  margin-top: auto;
}
.foot-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: .82rem;
  color: var(--ink-faint);
}
.foot-inner a { color: var(--ink-soft); }
.foot-inner a:hover { color: var(--accent); }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 720px) {
  .wrap { padding: 0 20px; }
  form.contact-form { padding: 32px 22px; }
  .field-row { grid-template-columns: 1fr; }
  .page-head { padding: 48px 0 16px; }
  .nav-inner { height: 64px; }
  .brand { font-size: 1.05rem; }
}