:root {
    --primary-color: #4361ee;
    --secondary-color: #3f37c9;
    --accent-color: #4cc9f0;
    --success-color: #4ade80;
    --danger-color: #f43f5e;
    --warning-color: #fb923c;
    --dark-color: #1e293b;
    --light-color: #f8fafc;
    --gray-color: #64748b;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: #f1f5f9;
    color: #334155;
    line-height: 1.6;
    padding-top: 0;
    position: relative;
    min-height: 100vh;
}

.language-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 25px;
    padding: 5px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    backdrop-filter: blur(10px);
}

.language-toggle .btn {
    border-radius: 20px;
    padding: 8px 16px;
    font-size: 0.9rem;
    margin: 0 2px;
}

.header {
    background: url('../images/header.png') no-repeat center center / cover, 
                linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 3rem 0;
    margin-bottom: 2rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    position: relative;
    overflow: hidden;
}

.header::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1;
}

.header h1 {
    font-size: 3rem;
    font-weight: bold;
    text-transform: uppercase;
    position: relative;
    animation: glow 1.5s infinite alternate;
}

@keyframes glow {
    from {
        text-shadow: 0 0 5px var(--accent-color), 0 0 10px var(--accent-color), 0 0 20px var(--accent-color), 0 0 40px var(--primary-color), 0 0 80px var(--primary-color);
    }
    to {
        text-shadow: 0 0 10px var(--accent-color), 0 0 20px var(--accent-color), 0 0 30px var(--accent-color), 0 0 50px var(--primary-color), 0 0 100px var(--primary-color);
    }
}

.header .container {
    position: relative;
    z-index: 2;
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.price-tag {
    background: linear-gradient(135deg, var(--success-color) 0%, #10b981 100%);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    font-weight: 600;
    margin-left: 0.5rem;
    display: inline-block;
    font-size: 0.9rem;
}

.contact-card {
    transition: all 0.3s ease;
    border-radius: 12px;
    border: none;
    overflow: hidden;
}

.contact-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
}

#keyCheckResult,
#keyInfoResult {
    border-radius: 8px;
    margin-top: 15px;
}

.card {
    margin-bottom: 25px;
    border-radius: 12px;
    border: none;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    overflow: hidden;
}

.card:hover {
    box-shadow: 0 15px 60px rgba(0,0,0,0.1);
    transform: translateY(-5px);
}

.card-header {
    border-bottom: none;
    padding: 1.5rem;
}

.card-body {
    padding: 1.5rem;
}

.btn {
    border-radius: 8px;
    padding: 0.6rem 1.5rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background: var(--secondary-color);
    border-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(67, 97, 238, 0.3);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #10b981 100%);
    border: none;
}

.btn-success:hover {
    background: linear-gradient(135deg, #10b981 0%, var(--success-color) 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn-info {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
}

.btn-info:hover {
    background: #38bdf8;
    border-color: #38bdf8;
    color: white;
}

.btn-outline-primary {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.form-control, .form-select {
    border-radius: 8px;
    padding: 0.75rem 1rem;
    border: 1px solid #e2e8f0;
    background-color: #fff;
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(67, 97, 238, 0.1);
}

.input-group {
    border-radius: 8px;
    overflow: hidden;
}

footer {
    background: var(--dark-color);
    color: white;
    padding: 2rem 0;
    margin-top: 3rem;
}

.section-title {
    position: relative;
    padding-bottom: 15px;
    margin-bottom: 30px;
    font-weight: 600;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    border-radius: 3px;
}

/* Animation Effects */
@keyframes fadeInUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

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

.fade-in.show {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 768px) {
    .header {
        padding: 2rem 0;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
    }

    .language-toggle {
        top: 10px;
        right: 10px;
    }

    .language-toggle .btn {
        padding: 6px 12px;
        font-size: 0.8rem;
    }
}

.referral-result {
    margin-top: 25px !important;
    margin-bottom: 15px !important;
}

#keyCheckResult,
#keyInfoResult,
#referralResult,
#referralInfoResult {
    border-radius: 8px;
    margin-top: 20px !important;
}

.buy-key-text {
    margin-top: 10px;
    text-align: left;
    font-size: 14px;
    color: #6c757d;
}

.buy-key-text a {
    color: #28a745;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.buy-key-text a:hover {
    color: #20c997;
    text-decoration: underline;
}

.buy-key-btn {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 25px;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(40, 167, 69, 0.3);
    text-decoration: none;
    display: inline-block;
}

.buy-key-btn:hover {
    background: linear-gradient(135deg, #218838 0%, #1abc9c 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(40, 167, 69, 0.4);
    color: white;
    text-decoration: none;
}

.buy-key-btn:active {
    transform: translateY(0);
}

.buy-key-btn i {
    margin-right: 8px;
}

@media (max-width: 768px) {
    .buy-key-btn {
        padding: 15px 25px;
        font-size: 14px;
        width: 100%;
        text-align: center;
    }
}