:root {
  --primary-gold: #ffd700;
  --secondary-gold: #daa520;
  --orange: #ff8c00;
  --black: #000000;
  --dark-gray: #1a1a1a;
  --white: #ffffff;
  --light-gray: #cccccc;
  --muted-gray: #a0a0a0;
  --font-family: "Montserrat", "Segoe UI", sans-serif;

  /* Thêm các biến màu cho phần rules/accordion/tab */
  --rules-bg: #fff8dc;
  --rules-shadow: rgba(0, 0, 0, 0.03);
  --rules-title: var(--primary-gold);
  --tab-active: var(--primary-gold);
  --tab-inactive: var(--primary-gold);
  --accordion-border: #f3e5ab;
  --accordion-header: #35523d;
  --accordion-arrow: #bdb76b;
  --accordion-body: #444;

  --max-width: 600px;
}

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

body {
  font-family: var(--font-family);
  color: var(--dark-gray);
  margin: 0;
  padding: 0;
}

label,
h2 {
  font-size: 1.5rem;
  color: var(--primary-gold);
}

p {
  font-size: 1.2rem;
}

button:disabled,
button[disabled] {
  background: var(--muted-gray) !important;
  color: #fff !important;
  cursor: not-allowed !important;
  opacity: 1 !important;
}

/* From Uiverse.io by Wendell47 */
.btn-login,
.play,
.voucher-exchange-btn,
.code-submit-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 15px 30px;
  font-size: 1.4rem;
  border: 0;
  position: relative;
  overflow: hidden;
  border-radius: 10rem;
  transition: all 0.3s ease;
  font-weight: bold;
  cursor: pointer;
  color: var(--white);
  background: var(--primary-gold);
  opacity: 0.9;
  z-index: 0;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-login:hover,
.play:hover,
.voucher-exchange-btn:hover,
.code-submit-btn:hover {
  background: var(--secondary-gold);
  color: #5c3b00; /* Màu chữ tối hơn */
  box-shadow: 0 6px 20px rgba(255, 200, 114, 0.5);
}

.btn-login:active,
.play:active,
.voucher-exchange-btn:active,
.code-submit-btn:active {
  transform: scale(0.97);
}

.hoverEffect {
  position: absolute;
  bottom: 0;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
  pointer-events: none;
}

.hoverEffect div {
  background: linear-gradient(
    90deg,
    #FFB3C2 0%,
    #FFC872 50%,
    #752092 100%
  );
  border-radius: 40rem;
  width: 10rem;
  height: 10rem;
  transition: width 0.4s ease, height 0.4s ease;
  filter: blur(20px);
  animation: effect infinite 3s linear;
  opacity: 0.4;
}

.btn-login:hover .hoverEffect div,
.play:hover .hoverEffect div,
.voucher-exchange-btn:hover .hoverEffect div,
.code-submit-btn:hover .hoverEffect div {
  width: 8rem;
  height: 8rem;
}

@keyframes effect {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}