/* ===== Reset & Base ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: Arial, Helvetica, sans-serif; line-height: 1.6; color: #333; background: #f9f9f9; }
.container { width: 90%; max-width: 1200px; margin: auto; }

/* ===== Header ===== */
header { background: #004080; color: white; padding: 15px 0; position: sticky; top: 0; z-index: 1000; }
.header-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; }
.logo { display: flex; align-items: center; gap: 15px; }
.logo img { width: 100px; height: auto; border-radius: 10px; }
.site-title h1 { font-size: 1.6rem; margin-bottom: 5px; }
.site-title p { font-size: 0.9rem; opacity: 0.9; }

/* ===== Navigation ===== */
nav { display: flex; align-items: center; flex-wrap: wrap; gap: 15px; }
nav a { color: white; text-decoration: none; padding: 8px 14px; transition: background 0.3s; }
nav a:hover { background: #0066cc; border-radius: 4px; }
nav .btn { background: #ffcc00; color: #333; border-radius: 4px; font-weight: bold; }
nav .btn:hover { background: #ffdb4d; }

/* Hamburger Menu */
.hamburger { display: none; font-size: 28px; cursor: pointer; color: white; }

/* ===== Banner Slider ===== */
.slider { position: relative; width: 100%; height: 450px; overflow: hidden; }
.slider .slide { position: absolute; width: 100%; height: 100%; opacity: 0; transition: opacity 1s ease-in-out; }
.slider .slide.active { opacity: 1; z-index: 1; }
.slider .slide img { width: 100%; height: 100%; object-fit: cover; }
.caption { position: absolute; bottom: 50px; left: 50px; color: white; font-size: 32px; font-weight: bold; background: rgba(0,0,0,0.4); padding: 10px 20px; border-radius: 6px; opacity: 0; }
.caption.active { opacity: 1; }
.fade-left { animation: fadeLeft 1s forwards; }
.fade-bottom { animation: fadeBottom 1s forwards; }
.fade-zoom { animation: fadeZoom 1s forwards; }
@keyframes fadeLeft { from {opacity:0; transform:translateX(-50px);} to {opacity:1; transform:translateX(0);} }
@keyframes fadeBottom { from {opacity:0; transform:translateY(50px);} to {opacity:1; transform:translateY(0);} }
@keyframes fadeZoom { from {opacity:0; transform:scale(0.8);} to {opacity:1; transform:scale(1);} }

/* ===== Sections ===== */
.section-white, .section-gray { padding: 60px 20px; text-align: center; }
.section-white { background: #fff; }
.section-gray { background: #f1f1f1; }
.section-white h2, .section-gray h2 { margin-bottom: 20px; color: #004080; }
ul { list-style: none; padding: 0; }
ul li { margin: 8px 0; font-size: 1.1rem; }

/* ===== Gallery Carousel ===== */
.carousel { position: relative; overflow: hidden; max-width: 900px; margin: auto; }
.carousel-track { display: flex; transition: transform 0.5s ease-in-out; }
.carousel-slide { min-width: 100%; height: 400px; object-fit: cover; }
.carousel button { position: absolute; top: 50%; transform: translateY(-50%); background: rgba(0,0,0,0.6); color: white; border: none; padding: 10px; cursor: pointer; font-size: 24px; }
.carousel .prev { left: 10px; }
.carousel .next { right: 10px; }

/* ===== Forms ===== */
form { max-width: 500px; margin: auto; display: flex; flex-direction: column; gap: 12px; }
form input, form textarea { padding: 10px; border: 1px solid #ccc; border-radius: 4px; }
form textarea { height: 120px; resize: vertical; }
form button { padding: 12px; background: #004080; color: white; border: none; cursor: pointer; border-radius: 4px; }
form button:hover { background: #0066cc; }

/* ===== Footer ===== */
footer { background: #004080; color: white; text-align: center; padding: 15px 0; margin-top: 20px; }

/* ===== Back-to-Top Button ===== */
#back-to-top { position: fixed; bottom: 25px; right: 25px; display: none; background: #004080; color: white; border: none; padding: 10px 14px; border-radius: 50%; cursor: pointer; font-size: 22px; z-index: 100; }
#back-to-top:hover { background: #0066cc; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .header-inner { flex-direction: column; align-items: flex-start; }
  .hamburger { display: block; }

  nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0, 64, 128, 0.95);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    display: none;
    z-index: 9999;
  }

  nav.active { display: flex; }
  nav a, nav .btn {
    width: 80%;
    text-align: center;
    padding: 15px 0;
    font-size: 1.3rem;
    border-bottom: 1px solid rgba(255,255,255,0.3);
  }

  .slider { height: 300px; }
  .caption { font-size: 1.2rem; bottom: 20px; left: 20px; }
  .carousel-slide { height: 250px; }
}

@media (max-width: 480px) {
  .caption { left: 50%; transform: translateX(-50%); bottom: 15px; font-size: 1rem; }
  nav { gap: 8px; }
}