/* Variabel Global untuk Tema Warna dan Font */
:root {
  --primary-color: #C00000; /* Merah khas */
  --secondary-color: #767676; /* Abu-abu untuk header atau aksen */
  --light-gray-color: #f4f4f4; /* Latar belakang body atau elemen ringan */
  --dark-gray-color: #333;    /* Teks utama */
  --white-color: #fff;
  --black-color: #000;

  --font-primary: 'Helvetica Neue', Helvetica, Arial, sans-serif;

  --header-bg: var(--secondary-color);
  --header-text-color: var(--white-color);

  --nav-bg: var(--primary-color);
  --nav-text-color: var(--white-color);
  --nav-hover-bg: #920000; /* Merah lebih gelap untuk hover */
  --nav-active-bg: #800000; /* Warna untuk link navigasi aktif */
  --nav-height-desktop: 60px;
  --nav-height-mobile: 50px;


  --section-title-color: var(--primary-color);
  --content-bg: var(--white-color);

  --button-bg: var(--primary-color);
  --button-text-color: var(--white-color);
  --button-hover-bg: var(--nav-hover-bg);
  --button-active-bg: #800000;

  --link-color: var(--primary-color);
  --link-hover-color: var(--nav-hover-bg);

  --footer-bg: var(--primary-color);
  --footer-text-color: var(--white-color);

  --placeholder-bg: #e9e9e9;
  --focus-ring-color: rgba(192, 0, 0, 0.3);
}

/* Reset Dasar & Pengaturan Body */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth; /* Scroll halus saat klik navigasi internal */
}

body {
  font-family: var(--font-primary);
  background-color: var(--light-gray-color);
  color: var(--dark-gray-color);
  line-height: 1.6;
  font-size: 16px;
}

/* Header */
header {
  background-color: var(--header-bg);
  color: var(--header-text-color);
  padding: 20px 15px;
  animation: fadeIn 1.5s ease-in-out;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  text-align: center;
}

.pt-logo-container {
  display: flex;
  align-items: center;
}

.pt-logo {
  max-height: 60px;
  margin-right: 15px;
}

.pt-text h1 {
  font-size: clamp(1.5em, 4vw, 1.8em);
  margin: 0;
  line-height: 1.2;
}

.tagline {
  font-size: clamp(0.8em, 2.5vw, 0.9em);
  font-style: italic;
  margin-top: 5px;
}

/* Navigasi */
nav {
  background-color: var(--nav-bg);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 5px rgba(0,0,0,0.15);
  min-height: var(--nav-height-mobile);
  padding: 0 15px;
  display: flex;
  align-items: center;
  justify-content: center; /* Default untuk desktop, ul akan terpusat */
}

.nav-brand { /* Jika Anda memutuskan menggunakan brand/logo di nav */
  color: var(--nav-text-color);
  font-weight: bold;
  font-size: 1.2em;
  text-decoration: none;
  margin-right: auto; /* Dorong brand ke kiri */
  display: none; /* Sembunyikan jika tidak dipakai, atau atur di mobile */
}

nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
}

nav ul li {
  margin: 0 5px;
}

nav ul li a {
  color: var(--nav-text-color);
  text-decoration: none;
  padding: 15px 15px; /* Sesuaikan dengan --nav-height-desktop jika perlu */
  display: block;
  border-radius: 5px;
  transition: background-color 0.2s ease, color 0.2s ease;
  font-weight: 500;
}

nav ul li a:hover,
nav ul li a:focus {
  background-color: var(--nav-hover-bg);
  color: var(--white-color); /* Pastikan warna teks tetap kontras saat hover */
  outline: none;
}
nav ul li a:focus-visible { /* Style focus yang lebih jelas untuk keyboard user */
    outline: 2px solid var(--white-color);
    outline-offset: 2px;
}

/* Style untuk link navigasi aktif (ditambahkan oleh JS scroll-spy) */
nav ul li a.active {
  background-color: var(--nav-active-bg);
  font-weight: bold;
}


/* Tombol Hamburger Menu (Hanya tampil di mobile) */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  margin-left: auto; /* Dorong ke kanan jika ada .nav-brand */
  z-index: 1001;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: '';
  display: block;
  height: 3px;
  width: 25px;
  background: var(--nav-text-color);
  border-radius: 2px;
  position: relative;
  transition: all 0.3s ease-in-out;
}

.nav-toggle span::before { top: -8px; }
.nav-toggle span::after { top: 8px; }

/* Konten Utama (Main) */
main { display: block; }

/* Sections */
section {
  padding: 40px 20px;
  background-color: var(--content-bg);
  margin: 25px auto;
  border-radius: 10px;
  max-width: 950px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

section h2 {
  color: var(--section-title-color);
  font-size: clamp(1.6em, 5vw, 2em);
  text-align: center;
  margin-top: 0;
  margin-bottom: 30px;
}

.about-content h3 {
  color: var(--section-title-color);
  margin-top: 25px;
  margin-bottom: 10px;
  font-size: clamp(1.1em, 3.5vw, 1.3em);
}
.about-content ul {
  list-style-position: outside;
  padding-left: 20px;
  margin-bottom: 15px;
}
.about-content ul li { margin-bottom: 8px; }

.experience-category {
  margin-top: 20px;
  padding: 20px;
  border-radius: 8px;
  background-color: var(--light-gray-color);
}
.experience-category h3 {
  color: var(--section-title-color);
  margin-top: 0;
  margin-bottom: 15px;
  font-size: clamp(1.1em, 3.5vw, 1.3em);
}
.experience-category ul {
  list-style: disc outside;
  padding-left: 20px;
  margin-left: 0;
}
.experience-category ul li { margin-bottom: 8px; }

.products-content .product-category { margin-bottom: 40px; }
.products-content .product-category h3 {
  font-size: clamp(1.2em, 4vw, 1.5em);
  color: var(--dark-gray-color);
  margin-bottom: 10px;
}
.products-content .product-category p {
  margin-bottom: 20px;
  font-size: 0.95em;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 25px;
}

.product-item {
  text-align: center;
  background-color: var(--content-bg);
  padding: 15px;
  border-radius: 8px;
  box-shadow: 0 3px 6px rgba(0,0,0,0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.product-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 12px rgba(0,0,0,0.12);
}

.product-item img.lazyload {
  width: 100%;
  height: 180px;
  object-fit: contain;
  display: block;
  margin: 0 auto 15px auto;
  background-color: var(--placeholder-bg);
  border-radius: 5px;
}

.product-caption {
  font-size: 1em;
  color: var(--dark-gray-color);
  font-weight: 600;
}

/* Tombol */
.btn {
  display: inline-block;
  text-decoration: none;
  background-color: var(--button-bg);
  color: var(--button-text-color);
  padding: 12px 25px;
  border-radius: 5px;
  border: none;
  cursor: pointer;
  font-weight: bold;
  text-align: center;
  transition: background-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  font-size: 0.95em;
}

.btn:hover,
.btn:focus {
  background-color: var(--button-hover-bg);
  transform: translateY(-2px);
  outline: none;
}
.btn:focus-visible { /* Style focus yang lebih jelas */
    box-shadow: 0 0 0 3px var(--focus-ring-color);
}
.btn:active {
  background-color: var(--button-active-bg);
  transform: translateY(0); /* Efek tombol ditekan kembali ke posisi awal */
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.2);
}

.download-btn { margin-top: 15px; }

/* Form Kontak */
#contact address p {
  margin-bottom: 10px;
  font-style: normal;
}
#contact address p strong {
  min-width: 80px;
  display: inline-block;
}

#contact a {
  color: var(--link-color);
  text-decoration: none;
}
#contact a:hover,
#contact a:focus {
  color: var(--link-hover-color);
  text-decoration: underline;
  outline: none;
}
#contact a:focus-visible {
    outline: 1px dashed var(--link-hover-color);
    outline-offset: 2px;
}

form {
  display: flex;
  flex-direction: column;
  max-width: 600px;
  margin: 30px auto 0 auto;
}

form div { margin-bottom: 15px; }

form label {
  display: block;
  margin-bottom: 5px;
  font-weight: bold;
  color: var(--dark-gray-color);
}

form input[type="text"],
form input[type="email"],
form textarea {
  width: 100%;
  padding: 12px;
  border-radius: 5px;
  border: 1px solid #ccc;
  font-size: 1em;
  font-family: var(--font-primary);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
form input[type="text"]:focus,
form input[type="email"]:focus,
form textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px var(--focus-ring-color);
}

form textarea {
  min-height: 120px;
  resize: vertical;
}

form button.btn { align-self: flex-start; }

/* Footer */
footer {
  background-color: var(--footer-bg);
  padding: 25px 15px;
  color: var(--footer-text-color);
  text-align: center;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 15px;
}

.footer-logos {
  display: flex;
  align-items: center;
  gap: 15px;
}

.footer-logo { max-height: 35px; }
.footer-content p {
  margin: 0;
  font-size: 0.9em;
}

/* Tombol WhatsApp Mengambang */
.whatsapp-button {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 60px;
  height: 60px;
  background-color: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0px 4px 12px rgba(0,0,0,0.3);
  z-index: 9999;
  transition: transform 0.2s ease-out, bottom 0.2s ease-out;
}

.whatsapp-button img {
  width: 32px;
  height: 32px;
}

.whatsapp-button:hover,
.whatsapp-button:focus {
  transform: scale(1.1);
  outline: none;
}
.whatsapp-button:focus-visible {
    outline: 2px solid var(--black-color);
    outline-offset: 2px;
}

/* Animasi */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.slide-up {
  opacity: 0;
  transform: translateY(25px);
  animation: slideUp 0.8s 0.2s ease-out forwards;
}
@keyframes slideUp { from { opacity: 0; transform: translateY(25px); } to { opacity: 1; transform: translateY(0); } }

/* Penyesuaian Responsif */
@media screen and (max-width: 992px) {
  .product-grid { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); }
}

@media screen and (max-width: 768px) { /* Mobile besar dan di bawahnya */
  body { font-size: 15px; }
  .header-top { flex-direction: column; }
  .pt-logo { margin-right: 0; margin-bottom: 10px; }

  nav {
    justify-content: space-between; /* Untuk brand di kiri (jika ada) dan toggle di kanan */
    min-height: var(--nav-height-mobile);
  }
  /* Uncomment .nav-brand jika Anda menggunakannya di HTML
  .nav-brand {
    display: block;
  } */
  .nav-toggle { display: block; }

  nav ul {
    display: none;
    position: absolute;
    top: var(--nav-height-mobile);
    left: 0;
    right: 0;
    background-color: var(--nav-bg);
    flex-direction: column;
    align-items: stretch;
    padding: 10px 0;
    box-shadow: 0 3px 5px rgba(0,0,0,0.1);
    border-top: 1px solid rgba(255,255,255,0.1);
  }

  nav.nav-open ul { display: flex; }

  nav.nav-open .nav-toggle span { background: transparent; }
  nav.nav-open .nav-toggle span::before { transform: rotate(45deg) translate(5px, 6px); }
  nav.nav-open .nav-toggle span::after { transform: rotate(-45deg) translate(5px, -6px); }

  nav ul li {
    width: 100%;
    margin: 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
  }
  nav ul li:last-child { border-bottom: none; }
  nav ul li a {
    text-align: left;
    padding: 12px 20px; /* Target sentuh yang baik */
    font-size: 0.95em;
    border-radius: 0;
    width: 100%;
  }
  nav ul li a.active { /* Style active di mobile bisa sedikit berbeda */
    background-color: var(--nav-active-bg);
    /* font-weight: bold; sudah diatur global */
  }


  section { padding: 30px 15px; margin: 20px auto; }
  .product-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 15px;
  }
  .product-item img.lazyload { height: 150px; }
  form button.btn { width: 100%; }
}

@media screen and (max-width: 480px) { /* Mobile kecil */
  .product-grid { grid-template-columns: 1fr; }
  .product-item img.lazyload { height: 170px; }
  .whatsapp-button {
    width: 50px;
    height: 50px;
    bottom: 15px;
    right: 15px;
  }
  .whatsapp-button img { width: 28px; height: 28px; }
  nav ul li a {
    padding: 10px 15px;
    font-size: 0.9em;
  }
}