/* ==============================================================
   Laboratório de História — IFPR • Campus Curitiba
   CSS completo — menu fixo com sombra suave + hero proporcional
   ============================================================== */

/* ---------- VARIÁVEIS GLOBAIS ---------- */
:root {
  --bg: #ffffff;
  --bg-soft: #f5ede7;
  --fg: #3e2a1a;
  --muted: #8b5e3c;
  --accent: #5c3b24;
  --accent-2: #8b5e3c;

  --card: #f9f6f2;
  --border: #d8c4b0;
  --shadow: rgba(0, 0, 0, .15);
  --shadow-strong: rgba(0, 0, 0, .25);

  /* Efeitos glass */
  --glass-bg: linear-gradient(180deg, rgba(92,59,36,.88), rgba(92,59,36,.96));
  --glass-panel: linear-gradient(180deg, rgba(92,59,36,.92), rgba(62,42,26,.98));
  --glass-border: rgba(216,196,176,.85);

  /* Altura da barra de navegação */
  --nav-h: clamp(56px, 7vh, 80px);
}

/* ---------- RESET BÁSICO ---------- */
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; padding: 0; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, Helvetica, Arial;
  color: var(--fg);
  background-color: var(--bg);
  padding-top: var(--nav-h); /* compensa menu fixo */
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-2); }

/* ==============================================================
   CABEÇALHO / MENU FIXO COM SOMBRA
   ============================================================== */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 100;
  background: var(--glass-bg);
  border-bottom: 2px solid var(--glass-border);
  color: #fff;
  backdrop-filter: blur(10px) saturate(1.15);
  -webkit-backdrop-filter: blur(10px) saturate(1.15);
  transition: all 0.25s ease;
  box-shadow: 0 0 0 transparent; /* inicia sem sombra */
}

/* Adiciona sombra suave ao rolar a página */
header.scrolled {
  box-shadow: 0 6px 18px var(--shadow-strong);
  border-bottom-color: rgba(216,196,176,1);
  backdrop-filter: blur(12px) saturate(1.2);
  -webkit-backdrop-filter: blur(12px) saturate(1.2);
}

.container { max-width: 1080px; margin: 0 auto; padding: 0 1rem; }

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--nav-h);
  padding: 0;
  transition: min-height 0.25s ease;
}

/* ---------- LOGO E TÍTULO ---------- */
.brand {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: #fff;
  text-decoration: none;
}

.brand-logo {
  width: 250px;
  height: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border-radius: 0;
  box-shadow: none;
}

.brand-logo img {
  width: 100%;
  height: auto;
  object-fit: contain;
  display: block;
}

.brand b { letter-spacing: .3px; }

/* ---------- LINKS DO MENU (DESKTOP) ---------- */
nav ul {
  display: flex;
  gap: 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
nav a {
  color: #fff;
  opacity: .95;
  line-height: 1;
  transition: color .2s ease, opacity .2s ease;
}
nav a:hover,
nav a:focus,
nav a[aria-current="page"] {
  opacity: 1;
  color: #ffe9d2;
}

/* Compactação ao rolar */
@media (min-width: 801px) {
  header.scrolled .nav { min-height: calc(var(--nav-h) * 0.85); }
}

/* ==============================================================
   MENU HAMBÚRGUER (RESPONSIVO)
   ============================================================== */
.nav-toggle { display: none; }

.hamburger {
  display: none;
  width: 44px;
  height: 44px;
  margin-left: .25rem;
  border-radius: 10px;
  cursor: pointer;
  position: relative;
}
.hamburger span {
  position: absolute;
  left: 10px;
  right: 10px;
  height: 2px;
  background: #fff;
  transform-origin: center;
  transition: transform .25s ease, opacity .2s ease, top .25s ease;
}
.hamburger span:nth-child(1) { top: 14px; }
.hamburger span:nth-child(2) { top: 21px; }
.hamburger span:nth-child(3) { top: 28px; }

@media (max-width: 880px) {
  .brand b { font-size: .95rem; }
  nav ul { gap: .75rem; }
}

@media (max-width: 800px) {
  :root { --nav-h: clamp(52px, 8vh, 68px); }

  .brand-text {
    position: absolute;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    width: 1px;
    height: 1px;
    overflow: hidden;
    white-space: nowrap;
  }

  .hamburger { display: inline-block; }
  nav ul { display: block; }
  nav a { display: block; padding: 0.95rem 1rem; }

  nav {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    background: var(--glass-panel);
    border-bottom: 2px solid var(--glass-border);
    box-shadow: 0 10px 24px var(--shadow);
    backdrop-filter: blur(12px) saturate(1.1);
    -webkit-backdrop-filter: blur(12px) saturate(1.1);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .22s ease, transform .22s ease;
  }

  .nav-toggle:checked ~ nav {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-toggle:checked + .hamburger span:nth-child(1) {
    top: 21px; transform: rotate(45deg);
  }
  .nav-toggle:checked + .hamburger span:nth-child(2) { opacity: 0; }
  .nav-toggle:checked + .hamburger span:nth-child(3) {
    top: 21px; transform: rotate(-45deg);
  }

  nav ul {
    max-height: calc(100dvh - var(--nav-h) - 12px);
    overflow-y: auto;
  }

  body { padding-top: var(--nav-h); }
}

/* ==============================================================
   HERO (BANNER PRINCIPAL AJUSTADO)
   ============================================================== */
.hero {
  height: 520px; /* altura ajustada */
  border-bottom: 2px solid var(--border);
  background-image: url("../img/Banner_mate.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;

  color: #000;
  text-align: center;
  padding: 2.5rem 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;

  position: relative;
  transition: opacity .3s ease, transform .3s ease;
  will-change: opacity, transform;
}

/* Altura reduzida em telas menores */
@media (max-width: 768px) {
  .hero {
    height: 300px;
    padding: 2rem 0;
    background-position: center top;
  }
}

/* ==============================================================
   CONTEÚDO / SEÇÕES
   ============================================================== */
h1 {
  font-size: clamp(1.8rem, 2.4vw + 1rem, 3rem);
  line-height: 1.15;
  margin: .6rem 0;
}
.lead { color: #f8e9dc; font-size: 1.07rem; }

section {
  padding: 3rem 0;
  border-bottom: 1px solid var(--border);
  background: #fff;
}
h2 {
  font-size: 1.6rem;
  margin: 0 0 1rem;
  color: var(--accent);
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1rem;
  box-shadow: 0 10px 24px var(--shadow);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .75rem 1rem;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 600;
  border: 1px solid var(--border);
  box-shadow: 0 6px 16px var(--shadow);
}
.btn.primary {
  background: linear-gradient(180deg, var(--accent), #3e2a1a);
  color: #fff;
}
.btn.ghost {
  background: transparent;
  color: var(--accent);
}

/* ==============================================================
   RODAPÉ
   ============================================================== */
footer {
  background: #5c3b24;
  color: #fff;
  text-align: center;
  padding: 2rem 0;
  font-size: .9rem;
}

/* ===== Justificação dos textos das seções Projeto e Acervo ===== */
#projeto p,
#acervo p {
  text-align: justify;
  text-justify: inter-word; /* distribui melhor o espaçamento entre as palavras */
  line-height: 1.6;         /* melhora a leitura */
}

/* ==============================================================
   ACESSIBILIDADE / REDUÇÃO DE MOVIMENTO
   ============================================================== */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}