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

/* ===== ROOT ===== */
:root {
  --bg: #0b0806;
  --accent: #C5BF65;
  --accent-dark: #b21e1e;
  --muted: #e6d9b0;
  --glass: rgba(255,255,255,0.04);

  --nav-h: 64px;
  --radius: 12px;

  font-family: "Be Vietnam Pro", sans-serif;
}

/* ===== BODY ===== */
body {
  background:
    linear-gradient(180deg, rgba(0,0,0,0.55), rgba(0,0,0,0.8)),
    url("img/nen2.jpg");

  background-size: cover;
  background-position: center;
  background-attachment: fixed;

  color: var(--muted);
  line-height: 1.6;
}

/* ===== NAVBAR ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-h);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
}

.navbar ul {
  display: flex;
  gap: 26px;
  list-style: none;
}

.navbar a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  font-size: 18px;
  padding: 6px 10px;
  border-radius: 8px;
}

.navbar a:hover,
.navbar a.active {
  background: rgba(197,191,101,0.12);
  color: #fff;
}

/* ===== VISIT BOX ===== */
.visit-box {
  position: fixed;
  right: 5px;
  bottom: 10px;
  display: inline-flex;
  align-items: center;
  gap: 10px;

  padding: 10px 16px;
  border-radius: 999px;

  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(6px);

  border: 1px solid rgba(197,191,101,0.35);
  box-shadow: 0 0 16px rgba(197,191,101,0.25);

  font-size: 14px;
  color: var(--muted);

}

.visit-box span {
  font-weight: 800;
  font-size: 17px;
  color: var(--accent);
  text-shadow: 0 0 6px rgba(197,191,101,0.6);
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  padding: calc(var(--nav-h) + 60px) 6% 60px;

  display: flex;
  align-items: center;
  justify-content: space-between;

  gap: 40px;
}

/* ===== HERO LEFT ===== */
.hero-left {
  max-width: 46%;
}

.hero-left h1 {
  font-family: "MyCustomFont", serif;
  font-size: 88px;
  line-height: 1.05;
  color: var(--accent);
  margin-bottom: 10px;
}

.hero-left h1 span {
  display: block;
  font-size: 96px;
  color: var(--accent-dark);
  margin-left: 36px;
  text-shadow: 0 0 18px rgba(216,54,54,0.25);
}

.hero-left p {
  font-size: 20px;
  max-width: 520px;
  color: rgba(255,255,255,0.88);
  margin: 22px 0 32px;
}

/* ===== CTA ===== */
.cta {
  display: inline-block;

  padding: 14px 30px;
  border-radius: 14px;

  background: linear-gradient(135deg, #8c1616, #b21e1e);
  color: #fff;
  text-decoration: none;

  font-size: 18px;
  font-weight: 600;

  border: 1.5px solid rgba(197,191,101,0.45);
  box-shadow: 0 0 14px rgba(197,191,101,0.35);

  transition: 0.25s ease;
}

.cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 22px rgba(197,191,101,0.6);
}

/* ===== HERO IMAGE ===== */
.trangchu {
  width: 54%;
  display: flex;
  justify-content: center;
}

.trangchu img {
  width: 100%;
  max-width: 680px;

  border-radius: 14px;
  border: 4px solid rgba(197,191,101,0.12);

  box-shadow: 0 18px 40px rgba(0,0,0,0.65);
}

/* ===== INTRO CARDS ===== */
.intro-cards {
  padding: 60px 6%;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.card {
  background: var(--glass);
  padding: 24px;
  border-radius: 14px;
  text-align: center;
  text-decoration: none;
  color: var(--muted);

  transition: 0.25s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.45);
}

.card h3 {
  font-family: "Noto Serif", serif;
  color: var(--accent);
  margin-bottom: 8px;
}

/* ===== FOOTER ===== */
.foot {
  padding: 50px 8%;
  margin-top: 80px;

  background: linear-gradient(180deg, #3a1f1f36, #2c1b1b0e);
  border-top: 2px solid var(--accent);
}

.foot-content {
  display: flex;
  justify-content: space-between;
  gap: 60px;
  flex-wrap: wrap;
}

.foot-section h4 {
  font-size: 1.4rem;
  color: var(--accent);
  margin-bottom: 12px;
}

.foot-section p {
  font-size: 1rem;
  margin-bottom: 8px;
}

.copyright {
  text-align: center;
  font-size: 16px;
  margin-top: 32px;
  opacity: 0.85;
}

.comment-box {
  max-width: 760px;
  margin: 120px auto 80px;
  padding: 32px 28px;

  background: linear-gradient(
    180deg,
    rgba(24,18,15,0.9),
    rgba(10,7,6,0.85)
  );

  border-radius: 22px;
  border: 1px solid rgba(197,191,101,0.25);
  box-shadow:
    0 25px 60px rgba(0,0,0,0.65),
    inset 0 0 0 1px rgba(255,255,255,0.03);

  backdrop-filter: blur(6px);
}

.comment-box h3 {
  text-align: center;
  margin-bottom: 22px;

  font-family: 'Noto Serif', serif;
  font-size: 1.25rem;
  font-weight: 600;

  color: #e6e1b5;
}

/* input + textarea */
.comment-box input,
.comment-box textarea {
  width: 100%;
  padding: 14px 16px;
  margin-bottom: 16px;

  background: rgba(0,0,0,0.45);
  color: #f2f2f2;

  border: 1px solid rgba(197,191,101,0.25);
  border-radius: 14px;

  font-family: 'Be Vietnam Pro', sans-serif;
  font-size: 0.95rem;

  outline: none;
  transition: 0.25s ease;
}

.comment-box input:focus,
.comment-box textarea:focus {
  border-color: #c5bf65;
  box-shadow: 0 0 0 2px rgba(197,191,101,0.15);
}

/* button */
.comment-box button {
  width: 100%;
  padding: 14px;

  background: linear-gradient(135deg, #c5bf65, #9f994c);
  color: #1a140f;

  border: none;
  border-radius: 16px;

  font-weight: 600;
  cursor: pointer;
  transition: 0.25s ease;
}

.comment-box button:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 25px rgba(197,191,101,0.35);
}

#cmtStatus {
  margin-top: 10px;
  text-align: center;
  font-size: 0.85rem;
  color: #c5bf65;
}


/* ===== FONT ===== */
@font-face {
  font-family: "MyCustomFont";
  src: url("font/font1.ttf") format("truetype");
}
/* ===============================
   EXHIBIT START OVERLAY
================================ */

#exhibitStart {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at center, rgba(199,167,108,0.08), transparent 60%),
    linear-gradient(180deg, #0b0806, #070504);
  z-index: 99999;

  display: flex;
  justify-content: center;
  align-items: center;

  font-family: 'Be Vietnam Pro', sans-serif;
  color: #e8dfd6;
}

/* Khu chạm */
.tap-zone {
  text-align: center;
  cursor: pointer;
}

/* Vòng gợn */
.tap-zone .ring {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  border: 1.5px solid rgba(199,167,108,0.5);
  animation: ripple 1.8s infinite;
}

/* Tay chạm */
.tap-zone .hand {
  position: relative;
  top: -110px;
  font-size: 2.6rem;
  animation: tap 1.2s infinite;
}

/* Text */
.tap-zone p {
  margin-top: -60px;
  font-size: 1rem;
  letter-spacing: 0.5px;
}

.tap-zone span {
  font-size: 0.9rem;
  color: #c7a76c;
}

/* Animations */
@keyframes ripple {
  0% { transform: scale(0.95); opacity: 0.4; }
  50% { transform: scale(1.15); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.4; }
}

@keyframes tap {
  0% { transform: translateY(0); opacity: 0.6; }
  50% { transform: translateY(-10px); opacity: 1; }
  100% { transform: translateY(0); opacity: 0.6; }
}

/* Khi mở không gian */
#exhibitStart.opened {
  opacity: 0;
  pointer-events: none;
  transition: 0.6s ease;
}