/* ---------------------------------- */
/* Modern CSS Reset          */
/* ---------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; }
body { line-height: 1.6; -webkit-font-smoothing: antialiased; }
img, picture, video, canvas, svg { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; }
p, h1, h2, h3, h4, h5, h6 { overflow-wrap: break-word; }

/* ---------------------------------- */
/* Global Variables (Light Blue & Orange Theme) */
/* ---------------------------------- */
:root{
  --primary-dark: #003249;   /* Deep Ocean Blue */
  --primary-light: #007EA7;  /* Bright Sea Blue */
  --accent: #F9A03F;        /* Sunset Orange */
  --accent-light: #ffb76b;
  --bg-light: #F0F4F8;       /* Very Light Blue-Gray */
  --bg-white: #FFFFFF;
  --ink: #333333;
  --ink-light: #6c757d;
  --border-color: #d8e2ec;
  --success: #28a745;
  --error: #dc3545;
  --shadow: 0 8px 25px rgba(0, 50, 73, 0.1);
  --shadow-sm: 0 4px 12px rgba(0, 50, 73, 0.07);
}

/* ---------------------------------- */
/* Base Typography          */
/* ---------------------------------- */
body {
  font-family: 'Sora', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg-white);
}

a { color: var(--primary-light); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--accent); }
h1, h2, h3 { font-weight: 700; color: var(--primary-dark); }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); line-height: 1.1; }
h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); margin-bottom: 1rem; }
h3 { font-size: 1.25rem; }
p { margin-bottom: 1rem; max-width: 65ch; }
.muted { color: var(--ink-light); }
.wrap { max-width: 1200px; margin: auto; padding: 0 24px; }

/* ---------------------------------- */
/* Header & Nav           */
/* ---------------------------------- */
header {
  position: sticky; top: 0;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
  transition: box-shadow 0.3s ease;
}
header.scrolled { box-shadow: var(--shadow-sm); }
.topbar { display: flex; align-items: center; justify-content: space-between; padding: 1rem 0; }
.logo { font-weight: 700; font-size: 1.1rem; color: var(--primary-dark); }
.logo:hover { color: var(--primary-dark); }
.desktop-nav a { margin: 0 1rem; font-weight: 600; color: var(--primary-light); }
.desktop-nav a.active { color: var(--accent); }

/* ---------------------------------- */
/* Buttons               */
/* ---------------------------------- */
.btn {
  display: inline-block; background: var(--accent); color: #fff;
  padding: 0.75rem 1.5rem; border-radius: 8px; font-weight: 700;
  border: 2px solid transparent; cursor: pointer; text-align: center;
  transition: all 0.3s ease;
}
.btn:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.btn-outline {
  background: transparent; color: var(--bg-white);
  border-color: var(--bg-white);
}
.btn-outline:hover { background: rgba(255, 255, 255, 0.1); }
.btn-nav { padding: 0.5rem 1rem; }

/* ---------------------------------- */
/* Layout & Sections        */
/* ---------------------------------- */
.hero {
  position: relative; min-height: 70vh; display: grid; place-items: center;
  text-align: center; color: var(--bg-white);
  background: linear-gradient(0deg, rgba(0, 50, 73, 0.7), rgba(0, 50, 73, 0.7)), url('/assets/hero-kata-karon-sunset.jpg') center/cover no-repeat;
  padding: 4rem 0;
}
.hero p { max-width: 600px; margin: 1rem auto 1.5rem; opacity: 0.9; }
.badges { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

section { padding: 5rem 0; }
section:nth-of-type(odd) { background-color: var(--bg-light); }
.section-header { text-align: center; margin-bottom: 3rem; }
.section-header p { max-width: 600px; margin: 0.5rem auto 0; color: var(--ink-light); }
.grid { display: grid; gap: 1.5rem; }
.cols-3 { grid-template-columns: repeat(3, 1fr); }
.cols-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--bg-white); border-radius: 12px;
  padding: 2rem; border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm); transition: transform 0.3s, box-shadow 0.3s;
}
.card:hover { transform: translateY(-8px); box-shadow: var(--shadow); }
.card h3 { margin-bottom: 0.75rem; }
.card p { font-size: 0.95rem; }

.price-card {
  text-align: center;
  position: relative; /* Needed for the popular tab */
  overflow: hidden;   /* Needed for the popular tab */
}
.price-card.popular {
  border-color: var(--accent);
  transform: scale(1.05);
}
.price-card.popular::before {
  content: "POPULAR";
  position: absolute;
  top: 18px;
  right: -30px;
  background: var(--accent);
  color: #fff;
  padding: 5px 30px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1px;
  transform: rotate(45deg);
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}
.price-card .price { font-size: 2.5rem; font-weight: 700; color: var(--primary-dark); margin: 1rem 0; }
ul.check { list-style: none; padding: 0; margin: 1rem 0; text-align: left; }
ul.check li { padding-left: 28px; position: relative; margin: 8px 0; }
ul.check li:before { content:"✓"; position: absolute; left: 0; top: 0; color: var(--accent); font-weight: 800; }

/* ---------------------------------- */
/* Gallery               */
/* ---------------------------------- */
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.gallery a { display: block; overflow: hidden; border-radius: 12px; box-shadow: var(--shadow-sm); }
.gallery img { width: 100%; height: 280px; object-fit: cover; transition: transform 0.5s ease; }
.gallery a:hover img { transform: scale(1.08); }

/* ---------------------------------- */
/* FAQ Section            */
/* ---------------------------------- */
.faq details {
  background: var(--bg-white); border: 1px solid var(--border-color);
  border-radius: 12px; padding: 1.25rem; margin: 1rem 0;
}
.faq summary { cursor: pointer; font-weight: 600; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
    content: '+'; font-size: 1.5rem; color: var(--accent);
    transition: transform 0.2s ease;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--border-color); }

/* ---------------------------------- */
/* Modern Contact Form          */
/* ---------------------------------- */
.contact-form {
  background: var(--bg-white); border-radius: 12px; padding: 2rem;
  border: 1px solid var(--border-color); box-shadow: var(--shadow);
}
.form-group { position: relative; margin-bottom: 1.5rem; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 1rem; border-radius: 8px;
  border: 1px solid var(--border-color); background: var(--bg-light);
  font-size: 1rem; outline: none; transition: all 0.2s ease;
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-group select { appearance: none; cursor: pointer; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(0, 126, 167, 0.15);
  background: var(--bg-white);
}
.form-group label {
  position: absolute; left: 1rem; top: 1rem;
  padding: 0 0.25rem; color: var(--ink-light);
  background: var(--bg-light); pointer-events: none;
  transition: all 0.2s ease;
}
/* Floating label logic */
.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label,
.form-group select.has-value + label {
  top: 0; transform: translateY(-50%) scale(0.9);
  color: var(--primary-light); background: var(--bg-white);
  font-weight: 600;
}
input.error, select.error, textarea.error { border-color: var(--error) !important; }
.form-footer { display: flex; align-items: center; gap: 1.5rem; margin-top: 1rem; }
.form-status { margin: 0; font-weight: 600; }
.form-status.success { color: var(--success); }
.form-status.error { color: var(--error); }


/* ---------------------------------- */
/* Footer                */
/* ---------------------------------- */
footer {
  padding: 3rem 0; background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.7);
}
footer h3 { color: var(--bg-white); margin-bottom: 1rem; }
footer a { color: rgba(255, 255, 255, 0.7); }
footer a:hover { color: var(--bg-white); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 2rem; }
.copyright {
  text-align: center; margin-top: 3rem; padding-top: 1rem;
  border-top: 1px solid var(--primary-light); font-size: 0.9rem;
}

/* ---------------------------------- */
/* Mobile & Helper Classes       */
/* ---------------------------------- */
.mobile-menu-btn {
  display: none; background: none; border: none; cursor: pointer;
  width: 24px; height: 24px; position: relative; z-index: 101;
}
.mobile-menu-btn span {
  display: block; width: 100%; height: 2px; background: var(--primary-dark);
  position: absolute; left: 0; transition: all 0.3s ease;
}
.mobile-menu-btn span:nth-child(1) { top: 4px; }
.mobile-menu-btn span:nth-child(2) { top: 11px; }
.mobile-menu-btn span:nth-child(3) { bottom: 4px; }
.mobile-menu-btn.open span:nth-child(1) { transform: rotate(45deg); top: 11px; }
.mobile-menu-btn.open span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.open span:nth-child(3) { transform: rotate(-45deg); top: 11px; }

.mobile-nav {
  display: none; position: absolute; top: 100%; left: 0;
  width: 100%; background: var(--bg-white);
  box-shadow: var(--shadow);
}
.mobile-nav.open { display: block; }
.mobile-nav a { display: block; padding: 1rem 1.5rem; font-weight: 600; }

.fade-in { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease-out, transform 0.6s ease-out; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

.back-to-top {
  position: fixed; bottom: 20px; right: 20px;
  background: var(--primary-dark); color: #fff;
  width: 44px; height: 44px; border-radius: 50%;
  display: grid; place-items: center; text-decoration: none;
  opacity: 0; visibility: hidden; transition: all 0.3s;
}
.back-to-top:hover { background: var(--primary-light); }
.back-to-top.visible { opacity: 1; visibility: visible; }

/* ---------------------------------- */
/* Responsive Breakpoints      */
/* ---------------------------------- */
@media (max-width: 960px) {
  .cols-3 { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .desktop-nav { display: none; }
  .mobile-menu-btn { display: block; }
  .cols-2 { grid-template-columns: 1fr; }
  .form-footer { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
    .gallery { grid-template-columns: 1fr; }
}