/* Premium Promocode Design */
:root {
    --primary: #22c55e; /* PUBG Green */
    --primary-glow: rgba(34, 197, 94, 0.4);
    --bg-dark: #0b0e14;
    --card-bg: rgba(20, 25, 33, 0.8);
    --text-main: #ffffff;
    --text-dim: #a0aec0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Rajdhani', 'Orbitron', sans-serif;
}

body {
    background: var(--bg-dark);
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(34, 197, 94, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(34, 197, 94, 0.05) 0%, transparent 40%);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-main);
    overflow: hidden;
}

.promo-container {
    width: 100%;
    max-width: 450px;
    padding: 20px;
    perspective: 1000px;
}

.promo-box {
    background: var(--card-bg);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 40px 30px;
    border-radius: 24px;
    text-align: center;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    animation: slideUp 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(50px) rotateX(-10deg); }
    to { opacity: 1; transform: translateY(0) rotateX(0); }
}

.promo-icon {
    font-size: 60px;
    color: var(--primary);
    margin-bottom: 20px;
    filter: drop-shadow(0 0 15px var(--primary-glow));
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); filter: drop-shadow(0 0 5px var(--primary-glow)); }
    50% { transform: scale(1.1); filter: drop-shadow(0 0 20px var(--primary-glow)); }
    100% { transform: scale(1); filter: drop-shadow(0 0 5px var(--primary-glow)); }
}

h1 {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 10px;
    text-transform: uppercase;
    background: linear-gradient(to right, #fff, var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

p {
    color: var(--text-dim);
    font-size: 16px;
    margin-bottom: 30px;
}

/* Input Styles */
.input-group {
    position: relative;
    margin-bottom: 25px;
}

#promoInput {
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 15px 20px;
    color: #fff;
    font-size: 18px;
    font-weight: 600;
    text-align: center;
    letter-spacing: 4px;
    transition: 0.3s;
    outline: none;
}

#promoInput:focus {
    border-color: var(--primary);
    box-shadow: 0 0 15px var(--primary-glow);
    background: rgba(0, 0, 0, 0.5);
}

#promoInput::placeholder {
    letter-spacing: normal;
    font-weight: 400;
    font-size: 14px;
    color: #555;
}

/* Button Styles */
#activateBtn {
    width: 100%;
    background: var(--primary);
    color: #000;
    border: none;
    padding: 16px;
    border-radius: 12px;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    transition: 0.4s;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

#activateBtn:hover {
    box-shadow: 0 0 30px var(--primary);
    transform: translateY(-2px);
}

#activateBtn:active {
    transform: translateY(0);
}

#activateBtn::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(45deg);
    transition: 0.5s;
    opacity: 0;
}

#activateBtn:hover::after {
    left: 100%;
    opacity: 1;
}

.back-link {
    display: inline-block;
    margin-top: 25px;
    color: var(--text-dim);
    text-decoration: none;
    font-size: 14px;
    transition: 0.3s;
    border-bottom: 1px solid transparent;
}

.back-link:hover {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

/* Mobile Responsive */
@media (max-width: 480px) {
    .promo-box {
        padding: 30px 20px;
    }
    h1 { font-size: 22px; }
}