/* =========================================================
   DIOTEC Climatização — Estilos (mobile-first, tema escuro)
   Identidade: navy profundo + azul-tech, estética de circuito.
   ========================================================= */

/* ---------- Variáveis / Design tokens ---------- */
:root {
  /* Cores da marca (extraídas da identidade DIOTEC) */
  --cor-primaria: #1E9BE0;        /* azul-tech vibrante */
  --cor-primaria-clara: #4FC3F7;  /* azul claro / brilho */
  --cor-primaria-escura: #0F6FB0; /* azul profundo */
  --cor-secundaria: #7EC8E8;      /* azul de "CLIMATIZAÇÃO" */

  --cor-bg: #071426;              /* navy profundo (fundo) */
  --cor-bg-2: #0B2038;            /* seções alternadas */
  --cor-bg-3: #0E2A47;            /* cards / superfícies elevadas */
  --cor-bg-4: #12385f;            /* hover / ícones */

  --cor-texto: #E8F1FA;           /* branco frio */
  --cor-texto-suave: #9DB4CC;     /* cinza-azulado */
  --cor-borda: rgba(120, 170, 220, 0.16);
  --cor-branco: #ffffff;
  --cor-whatsapp: #25d366;

  /* Tipografia */
  --fonte-display: "Saira Condensed", "Arial Narrow", system-ui, sans-serif;
  --fonte-marca: "Rajdhani", system-ui, sans-serif;
  --fonte-corpo: "Inter", "Segoe UI", system-ui, sans-serif;

  /* Escala tipográfica */
  --fs-hero: clamp(2.4rem, 6vw + 1rem, 4.5rem);
  --fs-h2: clamp(1.9rem, 4vw + 0.5rem, 3rem);
  --fs-h3: 1.2rem;
  --fs-base: 1rem;
  --fs-sm: 0.875rem;

  /* Espaçamentos */
  --sp-1: 0.5rem;
  --sp-2: 1rem;
  --sp-3: 1.5rem;
  --sp-4: 2rem;
  --sp-5: 3rem;
  --sp-6: 4.5rem;

  /* Layout */
  --container: 1140px;
  --raio: 14px;
  --sombra: 0 10px 30px rgba(2, 10, 24, 0.5);
  --sombra-azul: 0 8px 30px rgba(30, 155, 224, 0.25);
  --header-h: 70px;
  --transicao: 0.25s ease;
}

/* ---------- Reset básico ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  margin: 0;
  font-family: var(--fonte-corpo);
  font-size: var(--fs-base);
  line-height: 1.65;
  color: var(--cor-texto);
  background: var(--cor-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; height: auto; }
a { color: inherit; text-decoration: none; }

h1, h2, h3 {
  font-family: var(--fonte-display);
  line-height: 1.05;
  margin: 0 0 var(--sp-2);
  letter-spacing: 0.01em;
}

p { margin: 0 0 var(--sp-2); }

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

/* Palavra com gradiente azul (destaque) */
.grad {
  background: linear-gradient(90deg, var(--cor-primaria-clara), var(--cor-primaria));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Utilitários ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-3);
}
.hidden { display: none !important; }

/* ---------- Botões ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.5rem;
  font-family: var(--fonte-corpo);
  font-weight: 600;
  font-size: var(--fs-base);
  border: 2px solid transparent;
  border-radius: var(--raio);
  cursor: pointer;
  transition: background var(--transicao), color var(--transicao),
              transform var(--transicao), box-shadow var(--transicao), border-color var(--transicao);
}
.btn:active { transform: translateY(1px); }

.btn--primary {
  background: linear-gradient(135deg, var(--cor-primaria-clara), var(--cor-primaria-escura));
  color: var(--cor-branco);
  box-shadow: var(--sombra-azul);
}
.btn--primary:hover { filter: brightness(1.08); transform: translateY(-2px); }

.btn--ghost {
  background: transparent;
  color: var(--cor-primaria-clara);
  border-color: var(--cor-borda);
}
.btn--ghost:hover { border-color: var(--cor-primaria); background: rgba(30, 155, 224, 0.08); }

.btn--whatsapp {
  background: var(--cor-whatsapp);
  color: var(--cor-branco);
  padding: 0.6rem 1.1rem;
}
.btn--whatsapp:hover { filter: brightness(1.05); transform: translateY(-2px); }

.btn--lg { padding: 1rem 1.8rem; font-size: 1.1rem; }
.btn--block { width: 100%; }
.icon { flex-shrink: 0; }

/* ---------- Marca (logo textual + chip) ---------- */
.brand { display: inline-flex; align-items: center; gap: 0.6rem; }
.brand__mark { display: inline-flex; filter: drop-shadow(0 0 6px rgba(79, 195, 247, 0.4)); }
.brand__text { display: flex; flex-direction: column; line-height: 1; }
.brand__name {
  font-family: var(--fonte-marca);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: 0.14em;
  color: var(--cor-branco);
}
.brand__tag {
  font-family: var(--fonte-marca);
  font-weight: 600;
  font-size: 0.62rem;
  letter-spacing: 0.34em;
  color: var(--cor-secundaria);
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  background: rgba(7, 20, 38, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--cor-borda);
  z-index: 100;
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav__toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  background: transparent;
  border: 0;
  cursor: pointer;
}
.nav__toggle-bar {
  height: 2px;
  width: 100%;
  background: var(--cor-texto);
  border-radius: 2px;
  transition: transform var(--transicao), opacity var(--transicao);
}
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav__menu {
  position: fixed;
  inset: var(--header-h) 0 auto 0;
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  margin: 0;
  padding: var(--sp-3);
  list-style: none;
  background: var(--cor-bg-2);
  border-bottom: 1px solid var(--cor-borda);
  box-shadow: var(--sombra);
  transform: translateY(-120%);
  opacity: 0;
  visibility: hidden;
  transition: transform var(--transicao), opacity var(--transicao), visibility var(--transicao);
}
.nav__menu.is-open { transform: translateY(0); opacity: 1; visibility: visible; }
.nav__link {
  display: block;
  padding: 0.6rem 0.4rem;
  font-weight: 500;
  color: var(--cor-texto);
  border-radius: 8px;
}
.nav__link:hover, .nav__link.is-active { color: var(--cor-primaria-clara); }
.nav__cta { margin-top: var(--sp-1); }
.nav__cta .btn { width: 100%; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding-top: calc(var(--header-h) + var(--sp-5));
  padding-bottom: var(--sp-4);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(30, 155, 224, 0.18), transparent 60%),
    linear-gradient(180deg, var(--cor-bg-2), var(--cor-bg));
  overflow: hidden;
}
.hero__glow {
  position: absolute;
  top: -140px; right: -120px;
  width: 460px; height: 460px;
  background: radial-gradient(circle, rgba(79, 195, 247, 0.35), transparent 70%);
  filter: blur(30px);
  pointer-events: none;
}
.hero__inner {
  position: relative;
  display: grid;
  gap: var(--sp-4);
  align-items: center;
}
.hero__eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--cor-primaria-clara);
  margin-bottom: var(--sp-2);
}
.hero__title { font-size: var(--fs-hero); text-transform: uppercase; }
.hero__subtitle {
  font-size: 1.1rem;
  color: var(--cor-texto-suave);
  max-width: 48ch;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-3);
}
.hero__badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-1) var(--sp-3);
  margin: var(--sp-4) 0 0;
  padding: 0;
  list-style: none;
}
.hero__badges li {
  position: relative;
  padding-left: 1.4rem;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--cor-texto);
}
.hero__badges li::before {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--cor-primaria-clara);
  box-shadow: 0 0 8px var(--cor-primaria-clara);
}
.hero__panel {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-2);
  padding: var(--sp-3);
  background: var(--cor-bg-3);
  border: 1px solid var(--cor-borda);
  border-radius: var(--raio);
  box-shadow: var(--sombra-azul);
}
.hero__panel-tile {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  padding: var(--sp-3);
  background: var(--cor-bg-2);
  border: 1px solid var(--cor-borda);
  border-radius: 12px;
  transition: border-color var(--transicao), transform var(--transicao);
}
.hero__panel-tile:hover { border-color: var(--cor-primaria); transform: translateY(-3px); }
.hero__panel-tile svg { color: var(--cor-primaria-clara); }
.hero__panel-tile span {
  font-family: var(--fonte-display);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-size: 1.05rem;
  color: var(--cor-texto);
  line-height: 1.1;
}
.hero__tagline {
  position: relative;
  text-align: center;
  margin: var(--sp-4) 0 0;
  font-family: var(--fonte-display);
  letter-spacing: 0.35em;
  font-size: var(--fs-sm);
  color: var(--cor-secundaria);
  text-transform: uppercase;
}

/* ---------- Seções genéricas ---------- */
.section { padding-block: var(--sp-6); }
.section--alt { background: var(--cor-bg-2); }

.section__head {
  max-width: 680px;
  margin: 0 auto var(--sp-5);
  text-align: center;
}
.section__eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--cor-primaria-clara);
  margin-bottom: var(--sp-1);
}
.section__title { font-size: var(--fs-h2); text-transform: uppercase; }
.section__lead { color: var(--cor-texto-suave); }

/* ---------- Sobre ---------- */
.sobre__grid { display: grid; gap: var(--sp-4); }
.sobre__photo { margin: 0; }
.sobre__photo img {
  width: 100%;
  border-radius: var(--raio);
  border: 1px solid var(--cor-borda);
  box-shadow: var(--sombra);
  object-fit: cover;
  background: var(--cor-bg-3);
}
.sobre__photo figcaption {
  margin-top: var(--sp-2);
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}
.sobre__photo figcaption strong { color: var(--cor-texto); }
.sobre__photo figcaption span { font-size: var(--fs-sm); color: var(--cor-primaria-clara); }
/* ---------- Cards de serviços ---------- */
.cards { display: grid; gap: var(--sp-3); }
.card {
  padding: var(--sp-4);
  background: var(--cor-bg-3);
  border: 1px solid var(--cor-borda);
  border-radius: var(--raio);
  box-shadow: var(--sombra);
  transition: transform var(--transicao), border-color var(--transicao), box-shadow var(--transicao);
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--cor-primaria);
  box-shadow: var(--sombra-azul);
}
.card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px; height: 56px;
  margin-bottom: var(--sp-2);
  border-radius: 14px;
  background: rgba(30, 155, 224, 0.14);
  border: 1px solid var(--cor-borda);
  color: var(--cor-primaria-clara);
}
.card__title { font-size: var(--fs-h3); text-transform: none; }
.card__text { color: var(--cor-texto-suave); margin: 0; }

/* ---------- Benefícios ---------- */
.features { display: grid; gap: var(--sp-3); }
.feature { display: flex; gap: var(--sp-2); align-items: flex-start; }
.feature__icon {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  border-radius: 12px;
  background: rgba(30, 155, 224, 0.14);
  border: 1px solid var(--cor-borda);
  color: var(--cor-primaria-clara);
}
.feature__title { font-size: var(--fs-h3); text-transform: none; margin-bottom: 0.25rem; }
.feature__text { color: var(--cor-texto-suave); margin: 0; }

/* ---------- Diferenciais ---------- */
.diferenciais { display: grid; gap: var(--sp-3); }
.dif {
  text-align: center;
  padding: var(--sp-4) var(--sp-3);
  background: var(--cor-bg-3);
  border: 1px solid var(--cor-borda);
  border-radius: var(--raio);
  transition: transform var(--transicao), border-color var(--transicao);
}
.dif:hover { transform: translateY(-4px); border-color: var(--cor-primaria); }
.dif__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 68px; height: 68px;
  margin-bottom: var(--sp-2);
  border-radius: 50%;
  background: rgba(30, 155, 224, 0.12);
  border: 1px solid var(--cor-borda);
  color: var(--cor-primaria-clara);
}
.dif h3 { font-size: var(--fs-h3); text-transform: none; margin-bottom: 0.3rem; }
.dif p { color: var(--cor-texto-suave); margin: 0; font-size: 0.95rem; }

/* ---------- Contato / Vitrine WhatsApp ---------- */
.whatsapp-cta {
  background:
    radial-gradient(900px 400px at 50% 0%, rgba(30, 155, 224, 0.16), transparent 60%),
    var(--cor-bg);
}
.whatsapp-card {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  padding: var(--sp-5) var(--sp-4);
  background: var(--cor-bg-3);
  border: 1px solid var(--cor-primaria);
  border-radius: var(--raio);
  box-shadow: var(--sombra-azul);
}
.whatsapp-card__lead {
  color: var(--cor-texto-suave);
  max-width: 48ch;
  margin: 0 auto var(--sp-4);
}
.whatsapp-card .btn--whatsapp { box-shadow: 0 8px 24px rgba(37, 211, 102, 0.35); }
.whatsapp-card__phone {
  margin: var(--sp-3) 0 var(--sp-4);
  font-family: var(--fonte-display);
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 2.6rem);
  line-height: 1;
}
.whatsapp-card__phone a { color: var(--cor-branco); }
.whatsapp-card__phone a:hover { color: var(--cor-primaria-clara); }
.whatsapp-card__chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--sp-1) var(--sp-2);
  margin: 0;
  padding: 0;
  list-style: none;
}
.whatsapp-card__chips li {
  font-size: var(--fs-sm);
  color: var(--cor-texto);
  background: rgba(30, 155, 224, 0.12);
  border: 1px solid var(--cor-borda);
  border-radius: 999px;
  padding: 0.35rem 0.9rem;
}

/* ---------- Footer ---------- */
.site-footer { background: #050f1e; color: #9db4cc; border-top: 1px solid var(--cor-borda); }
.site-footer__inner {
  display: grid;
  gap: var(--sp-3);
  padding-block: var(--sp-5);
}
.brand--footer { margin-bottom: var(--sp-2); }
.site-footer__brand p { color: #7f97b0; max-width: 42ch; margin-top: var(--sp-2); }
.site-footer__nav { display: flex; flex-wrap: wrap; gap: var(--sp-2); }
.site-footer__nav a:hover { color: var(--cor-primaria-clara); }
.site-footer__social { display: flex; gap: var(--sp-2); }
.site-footer__social a {
  display: inline-flex;
  padding: 8px;
  border: 1px solid var(--cor-borda);
  border-radius: 10px;
  color: var(--cor-secundaria);
  transition: color var(--transicao), border-color var(--transicao);
}
.site-footer__social a:hover { color: var(--cor-primaria-clara); border-color: var(--cor-primaria); }
.site-footer__bottom {
  border-top: 1px solid var(--cor-borda);
  padding-block: var(--sp-2);
  font-size: var(--fs-sm);
}
.site-footer__bottom p { margin: 0; color: #6b83a0; }

/* ---------- Botão flutuante WhatsApp ---------- */
.whatsapp-float {
  position: fixed;
  right: 18px; bottom: 18px;
  z-index: 90;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 58px; height: 58px;
  border-radius: 50%;
  background: var(--cor-whatsapp);
  color: var(--cor-branco);
  box-shadow: 0 8px 22px rgba(37, 211, 102, 0.45);
  transition: transform var(--transicao);
}
.whatsapp-float:hover { transform: scale(1.08); }

/* =========================================================
   BREAKPOINTS
   ========================================================= */
@media (min-width: 720px) {
  .hero__inner { grid-template-columns: 1.1fr 0.9fr; }
  .sobre__grid { grid-template-columns: 0.85fr 1.15fr; align-items: start; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .features { grid-template-columns: repeat(2, 1fr); gap: var(--sp-4); }
  .diferenciais { grid-template-columns: repeat(2, 1fr); }
  .site-footer__inner { grid-template-columns: 1.4fr 1fr auto; align-items: center; }
}

@media (min-width: 960px) {
  .cards { grid-template-columns: repeat(4, 1fr); }
  .cards--3 { grid-template-columns: repeat(3, 1fr); }
  .diferenciais { grid-template-columns: repeat(4, 1fr); }

  .nav__toggle { display: none; }
  .nav__menu {
    position: static;
    flex-direction: row;
    align-items: center;
    gap: var(--sp-1);
    padding: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
    transform: none;
    opacity: 1;
    visibility: visible;
  }
  .nav__cta { margin-top: 0; margin-left: var(--sp-1); }
  .nav__cta .btn { width: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}