:root {
  --primary: #005f87;
  --accent: #008cba;
  --bg: #f5f8fb;
  --card: #fff;
  --text: #263238;
  --radius: 12px;
  --maxw: 1200px;
  --shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
}

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

body {
  font-family: 'Roboto', sans-serif;
  color: var(--text);
  background: var(--bg);
  /* Espaço padrão para o header desktop */
  padding-top: 80px;
  -webkit-font-smoothing: antialiased;
}

/* ===========================
   HEADER & NAV
=========================== */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 80px;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
  transition: all .3s ease;
  z-index: 1000;
}

header.scrolled {
  height: 70px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
}

.nav-container {
  width: 100%;
  max-width: var(--maxw);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
}

.nav-logo {
  color: var(--primary);
  font-size: 1.3rem;
  font-weight: 700;
}

/* Botão Hambúrguer (Oculto no Desktop) */
.menu-toggle {
  display: none;
  font-size: 1.8rem;
  cursor: pointer;
  color: var(--primary);
  background: none;
  border: none;
  z-index: 1100;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1.8rem;
}

nav ul li a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  position: relative;
}

nav ul li a::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width .3s;
}

nav ul li a:hover::after,
nav ul li a.active::after {
  width: 100%;
}

/* ===========================
   HERO
=========================== */
.hero {
  max-width: var(--maxw);
  margin: 2rem auto;
  background: linear-gradient(135deg, #0077a8 0%, #003f5c 100%);
  color: #fff;
  border-radius: var(--radius);
  padding: 3rem 2rem;
  box-shadow: var(--shadow);
  text-align: center;
}

.hero h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  margin-bottom: .8rem;
}

.hero p {
  max-width: 720px;
  margin: 0 auto 1.5rem auto;
  font-size: 1.05rem;
  line-height: 1.6;
}

/* ===========================
   SEÇÃO DE PALETES
=========================== */
.paletes {
  max-width: var(--maxw);
  margin: 2rem auto;
  padding: 0 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.palete-card {
  display: flex;
  flex-direction: row;
  gap: 2rem;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform .3s, box-shadow .3s;
}

.palete-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
}

.palete-card img {
  width: 360px;
  height: 260px;
  object-fit: cover;
}

.palete-info {
  flex: 1;
  padding: 1.8rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.palete-info h3 {
  color: var(--primary);
  margin-bottom: .6rem;
  font-size: 1.4rem;
}

.palete-info p {
  margin-bottom: 1rem;
  line-height: 1.6;
  color: #444;
}

.btn {
  display: inline-block;
  align-self: flex-start;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  padding: .7rem 1.2rem;
  border-radius: 8px;
  font-weight: 600;
  transition: background .3s;
}

.btn:hover {
  background: #ff5a5a;
}

/* FOOTER */
footer {
  margin-top: 3rem;
  background: var(--primary);
  color: #fff;
  text-align: center;
  padding: 2rem 1rem;
  line-height: 1.6;
}

/* ===========================
   RESPONSIVIDADE
=========================== */

@media (max-width: 1200px) {
  .nav-container, 
  .hero {
    padding-left: 1rem;
    padding-right: 1rem;
  }
}

@media (max-width: 980px) {
  /* Ajuste dos cards para coluna em tablets/mobile */
  .palete-card {
    flex-direction: column;
  }
  
  .palete-card img {
    width: 100%;
    height: 240px; /* Altura ajustada para mobile */
  }

  .palete-info {
    padding: 1.5rem;
  }
}

@media (max-width: 780px) {
  /* Ajuste do corpo para header menor */
  body {
    padding-top: 70px;
  }

  /* Header Mobile */
  header, 
  header.scrolled {
    height: 70px;
  }

  /* Exibe botão hambúrguer */
  .menu-toggle {
    display: block;
  }

  /* Menu Mobile Dropdown */
  nav ul {
    position: absolute;
    top: 70px; /* Altura do header mobile */
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    background-color: #f8f9fa;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;

    /* Estado fechado */
    max-height: 0;
    opacity: 0;
    padding: 0;
    overflow: hidden;
    transition: all 0.3s ease;
  }

  /* Estado aberto (via JS) */
  nav ul.open {
    max-height: 600px;
    opacity: 1;
    padding: 1rem 0;
    overflow: visible;
  }

  nav ul li {
    width: 100%;
    text-align: center;
  }

  nav ul li a {
    display: block;
    width: 100%;
    padding: 12px 0;
  }
  
  nav ul li a:hover {
    background: #e9ecef;
  }

  nav ul li a::after {
    display: none;
  }
}