/* ============================================================
   TERMOPLAS — Base, layout, navbar, botões, microinterações
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: auto; /* Lenis controla o scroll */
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Lenis */
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
.lenis.lenis-stopped { overflow: hidden; }

img, picture, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
input, textarea, select { font: inherit; color: inherit; }
::selection { background: var(--bordo); color: #fff; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--ink);
}

/* ---------- Layout primitives ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { position: relative; padding-block: var(--section-y); }
.section--dark { background: var(--graphite-900); color: var(--on-dark); }
.section--dark h1,
.section--dark h2,
.section--dark h3 { color: var(--white); }
.section--paper { background: var(--paper); }

/* ---------- Eyebrow / rótulos ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  font-size: var(--fs-eyebrow);
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--muted);
}
.section--dark .eyebrow { color: var(--on-dark-70); }

.section-head { max-width: 62ch; }
.section-head h2 { font-size: var(--fs-h2); margin-top: 1.1rem; }
.section-head .lead {
  margin-top: 1.4rem;
  font-size: var(--fs-lead);
  color: var(--muted);
  max-width: 46ch;
  font-weight: 400;
}
.section--dark .section-head .lead { color: var(--on-dark-70); }

.dot { color: var(--bordo); }

/* ---------- Botões ---------- */
.btn {
  --bg: var(--graphite);
  --fg: #fff;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.7em;
  padding: 1.05em 1.9em;
  border-radius: 100px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.98rem;
  letter-spacing: 0.01em;
  color: var(--fg);
  background: var(--bg);
  overflow: hidden;
  isolation: isolate;
  transition: color var(--dur) var(--ease), transform var(--dur-fast) var(--ease);
  will-change: transform;
}
.btn > span { position: relative; z-index: 1; }
.btn::after {
  content: "";
  position: absolute; inset: 0; z-index: 0;
  background: var(--bordo);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn:hover::after { transform: scaleX(1); }
.btn .btn__arrow { transition: transform var(--dur) var(--ease); }
.btn:hover .btn__arrow { transform: translateX(4px); }

.btn--ghost {
  --fg: var(--ink);
  background: transparent;
  border: 1px solid var(--line-strong);
}
.btn--ghost::after { background: var(--graphite); }
.btn--ghost:hover { --fg: #fff; border-color: transparent; }

.section--dark .btn--ghost { --fg: #fff; border-color: var(--line-dark); }
.section--dark .btn--ghost::after { background: var(--bordo); }

/* link com sublinhado bordô */
.link-underline {
  position: relative;
  font-weight: 500;
}
.link-underline::after {
  content: "";
  position: absolute; left: 0; bottom: -3px;
  width: 100%; height: 1px;
  background: var(--bordo);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--dur) var(--ease);
}
.link-underline:hover::after { transform: scaleX(1); transform-origin: left; }

/* ---------- Ring (motivo do logo) ---------- */
.ring {
  display: inline-block;
  border-radius: 50%;
  border: 1.5px solid currentColor;
  position: relative;
}
.ring::before {
  content: "";
  position: absolute; inset: 3px;
  border-radius: 50%;
  border: 1.5px solid var(--bordo);
  clip-path: inset(0 0 55% 0);
}
@keyframes ring-spin { to { transform: rotate(360deg); } }

/* ============================================================
   NAVBAR
   ============================================================ */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: background var(--dur) var(--ease), backdrop-filter var(--dur) var(--ease), border-color var(--dur) var(--ease);
  border-bottom: 1px solid transparent;
}
.nav__inner {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.nav.is-scrolled {
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  border-bottom-color: var(--line);
}
.nav__logo img { height: 30px; width: auto; transition: opacity var(--dur) var(--ease); }
.nav__logo .logo-white { display: none; }

/* topo (hero escuro): usa logo branca */
.nav.at-top .logo-dark { opacity: 0; position: absolute; }
.nav.at-top .logo-white { display: block; }
.nav.at-top { color: var(--white); }

.nav__menu {
  display: flex;
  align-items: center;
  gap: clamp(1.5rem, 2.5vw, 2.8rem);
}
.nav__link {
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: inherit;
  opacity: 0.85;
  transition: opacity var(--dur-fast) var(--ease);
}
.nav.is-scrolled .nav__link { color: var(--ink); }
.nav__link:hover { opacity: 1; }

.nav__cta { display: flex; align-items: center; gap: 1.2rem; }
.nav .btn { padding: 0.75em 1.4em; font-size: 0.9rem; }
.nav.at-top .btn { --bg: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.28); }
.nav.at-top .btn::after { background: var(--bordo); }

.nav__toggle { display: none; }

/* menu mobile fullscreen */
.nav__overlay {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: var(--graphite-900);
  color: var(--white);
  padding: calc(var(--nav-h) + 3rem) var(--gutter) 3rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.2rem;
  clip-path: inset(0 0 100% 0);
  transition: clip-path 0.8s var(--ease);
  pointer-events: none;
}
.nav__overlay.is-open { clip-path: inset(0 0 0% 0); pointer-events: auto; }
.nav__overlay a {
  font-family: var(--font-display);
  font-size: clamp(2rem, 9vw, 3.6rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  padding: 0.28em 0;
  border-bottom: 1px solid var(--line-dark);
  display: flex;
  justify-content: space-between;
  align-items: center;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.nav__overlay.is-open a { opacity: 1; transform: none; transition-delay: calc(0.1s + var(--i) * 0.06s); }
.nav__overlay a span { color: var(--on-dark-40); font-family: var(--font-body); font-size: 0.9rem; }

/* ============================================================
   Cursor customizado (ring)
   ============================================================ */
.cursor {
  position: fixed;
  top: 0; left: 0;
  width: 34px; height: 34px;
  border: 1.5px solid var(--bordo);
  border-radius: 50%;
  pointer-events: none;
  z-index: 1000;
  transform: translate(-50%, -50%);
  transition: width 0.35s var(--ease), height 0.35s var(--ease), background 0.35s var(--ease), opacity 0.35s var(--ease), border-color 0.35s var(--ease);
  mix-blend-mode: difference;
  opacity: 0;
}
.cursor.is-visible { opacity: 1; }
.cursor.is-active { width: 66px; height: 66px; background: rgba(141,23,57,0.12); }
.cursor__dot {
  position: fixed;
  top: 0; left: 0;
  width: 5px; height: 5px;
  background: var(--bordo);
  border-radius: 50%;
  pointer-events: none;
  z-index: 1000;
  transform: translate(-50%, -50%);
  opacity: 0;
}
.cursor__dot.is-visible { opacity: 1; }
@media (hover: none), (pointer: coarse) {
  .cursor, .cursor__dot { display: none; }
}

/* ============================================================
   Reveals (estado inicial; JS remove)
   ============================================================ */
.js [data-reveal] { opacity: 0; will-change: transform, opacity; }
.js .hero h1 .line > span { transform: translateY(110%); }

/* Scroll cue */
.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: clamp(1.5rem, 4vh, 2.6rem);
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
  color: var(--on-dark-70);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}
.scroll-cue__line {
  width: 1px; height: 46px;
  background: linear-gradient(var(--on-dark-40), transparent);
  position: relative;
  overflow: hidden;
}
.scroll-cue__line::after {
  content: "";
  position: absolute; top: -50%; left: 0;
  width: 100%; height: 50%;
  background: var(--bordo);
  animation: cue 2.4s var(--ease) infinite;
}
@keyframes cue {
  0% { transform: translateY(-100%); }
  60%, 100% { transform: translateY(300%); }
}

/* ============================================================
   Utilidades
   ============================================================ */
.u-mask { overflow: hidden; display: block; }
.u-line-fill {
  height: 1px;
  background: var(--line);
  position: relative;
}
.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;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
}