/* =========================
   VARIABLES (CORES)
========================= */
:root {
  --green-dark: #24332a;
  --green-main: #4f6b5a;
  --green-soft: #8fa89a;

  --accent: #c79a63;
  --accent-dark: #a67945;

  --bg-light: #f7f5f2;
  --white: #ffffff;
  --dark: #1e1e1e;

  --radius: 14px;
  --shadow: 0 10px 30px rgba(0,0,0,0.08);
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Segoe UI", system-ui, sans-serif;
  background: var(--bg-light);
  color: var(--dark);
  line-height: 1.6;
  font-size: 16px;
}

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius);
}

a {
  text-decoration: none;
  color: inherit;
}

/* =========================
   HEADER / NAV
========================= */
header {
  background: var(--green-dark);
  position: sticky;
  top: 0;
  z-index: 1000;
}

nav {
  max-width: 1200px;
  margin: auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* LOGO */
.logo {
  background: var(--white);
  padding: 0.4rem 0.6rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.logo img {
  max-height: 45px;
}

/* LINKS */
.nav-links {
  list-style: none;
  display: flex;
  gap: 2rem;
}

.nav-links a {
  color: #ffffff;
  font-weight: 700;
  font-size: 0.95rem;
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: var(--transition);
}

.nav-links a:hover::after {
  width: 100%;
}

/* MENU BURGER */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 6px;
}

.nav-toggle span {
  width: 26px;
  height: 3px;
  background: white;
  border-radius: 2px;
  transition: var(--transition);
}

/* =========================
   HERO
========================= */
.hero {
  background: linear-gradient(180deg, var(--green-main), var(--bg-light));
  padding: 4rem 1.5rem;
  text-align: center;
  border-radius: 0 0 40px 40px;
}

.hero-content {
  max-width: 650px;
  margin: auto;
}

.hero h1 {
  font-size: clamp(1.8rem, 5vw, 3rem); /* tipografia fluida: escala suave entre telas */
  color: white;
  margin-bottom: 1rem;
}

.hero p {
  color: #f0f0f0;
  margin-bottom: 2rem;
}

.hero .btn {
  background: var(--accent);
  color: white;
  padding: 0.9rem 1.8rem;
  border-radius: 999px;
  font-weight: 700;
  transition: var(--transition);
}

.hero .btn:hover {
  background: var(--accent-dark);
}

/* =========================
   SECTIONS
========================= */
section {
  max-width: 1200px;
  margin: auto;
  padding: 4rem 1.5rem;
  text-align: center;
}

h2 {
  font-size: 2.2rem;
  margin-bottom: 2.5rem;
  color: var(--green-dark);
}

/* =========================
   CARDS
========================= */
.cards-container,
.card-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.card {
  background: var(--white);
  padding: 1.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  text-align: left;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.12);
}

.card h3 {
  margin-top: 1rem;
  color: var(--green-dark);
}

.card p {
  color: #444;
}

/* =========================
   AVIS / CAROUSEL
========================= */
/* =========================
   AVIS / TESTIMONIALS
========================= */

.avis {
  background: #4f6b5a;
  padding: 4rem 1rem;
  overflow: hidden;
}

.avis h2 {
  text-align: center;
  font-size: 2.2rem;
  margin-bottom: 3rem;
  color: var(--white); /* corrigido: #1f2a24 sobre #4f6b5a falhava WCAG AA (ratio ~2.9:1) */
}

.avis-wrapper {
  max-width: 100%;
  overflow: hidden;
  position: relative;
}

.carousel-track {
  display: flex;
  gap: 2rem;
  width: max-content;
  animation: avis-scroll 25s linear infinite;
  will-change: transform; /* dica ao browser para usar GPU no scroll */
}

.carousel-track:hover {
  animation-play-state: paused;
}

.testimonial {
  background: #ffffff;
  min-width: 320px;
  max-width: 320px;
  padding: 2rem;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  color: #2b2b2b;
}

.testimonial p {
  font-style: italic;
  margin-bottom: 1rem;
  line-height: 1.5;
}

.testimonial span {
  font-weight: 600;
  color: #5c7a67;
}

/* Animation infinie */
@keyframes avis-scroll {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}


/* =========================
   CONTACT FORM
========================= */
form {
  max-width: 600px;
  margin: auto;
  display: grid;
  gap: 1rem;
  text-align: left;
}

input,
textarea {
  padding: 0.8rem;
  border-radius: var(--radius);
  border: 1px solid #ccc;
  font-size: 1rem;
}

button[type="submit"] {
  background: var(--green-main);
  color: white;
  border: none;
  padding: 0.9rem;
  border-radius: var(--radius);
  font-weight: bold;
  cursor: pointer;
}

button[type="submit"]:hover {
  background: var(--green-dark);
}

/* =========================
   FOOTER
========================= */
footer {
  background: var(--green-dark);
  color: white;
  padding: 3rem 1.5rem;
}

.footer-grid {
  max-width: 1200px;
  margin: auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: center;
}

.footer-grid a {
  color: white;
  font-weight: 600;
}

/* =========================
   BACK TO TOP
========================= */
#backToTop {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 50%;
  width: 45px;
  height: 45px;
  font-size: 1.4rem;
  cursor: pointer;
  display: none;
  box-shadow: 0 10px 25px rgba(0,0,0,0.3);
}

/* =========================
   ANIMATION
========================= */
@keyframes scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-300%); }
}

/* =========================
   FOOTER DESKTOP
========================= */
@media (min-width: 769px) {
  .footer-grid {
    flex-direction: row;
    justify-content: space-around;
    align-items: flex-start;
  }
}

/* =========================
   RESPONSIVE — Tablet e Mobile
========================= */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background: var(--green-dark);
    flex-direction: column;
    align-items: center;
    display: none;
    padding: 1.5rem 0;
    z-index: 999;
  }

  .nav-links.active {
    display: flex;
  }

  .hero h1 {
    font-size: 2.2rem;
  }
}

/* =========================
   RESPONSIVE — Pequenos ecrãs (<480px)
========================= */
@media (max-width: 480px) {
  section {
    padding: 2.5rem 1rem; /* reduz padding lateral em telemóveis pequenos */
  }

  .hero {
    padding: 3rem 1rem;
  }

  .testimonial {
    min-width: 260px;
    max-width: 260px; /* cards de testimonial mais estreitos em ecrãs pequenos */
  }

  .cards-container,
  .card-container {
    grid-template-columns: 1fr; /* 1 coluna garantida em telemóveis pequenos */
  }
}