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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #e0e0e0;
}

.container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: 32px 24px;
    text-align: center;
}

.logo {
    margin-bottom: 16px;
}

h1 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 4px;
    background: linear-gradient(90deg, #4CAF50, #81C784);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 14px;
    color: #9e9e9e;
    margin-bottom: 24px;
}

.timer {
    background: rgba(76, 175, 80, 0.15);
    border: 1px solid rgba(76, 175, 80, 0.3);
    border-radius: 16px;
    padding: 16px;
    margin-bottom: 24px;
}

.timer-label {
    font-size: 12px;
    color: #81C784;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.timer-value {
    font-size: 36px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: #4CAF50;
}

.pricing {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.plan {
    flex: 1;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 16px 12px;
    cursor: pointer;
    transition: all 0.2s;
}

.plan:hover {
    border-color: rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.06);
}

.plan.featured {
    border-color: rgba(76, 175, 80, 0.4);
    position: relative;
}

.plan.selected {
    border-color: #4CAF50;
    background: rgba(76, 175, 80, 0.1);
}

.plan-name {
    font-size: 13px;
    color: #bdbdbd;
    margin-bottom: 8px;
}

.plan-price .price {
    font-size: 28px;
    font-weight: 700;
    color: #fff;
}

.plan-price {
    font-size: 16px;
    color: #9e9e9e;
}

.plan-badge {
    position: absolute;
    top: -8px;
    right: 8px;
    background: #4CAF50;
    color: #fff;
    font-size: 10px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 8px;
}

.btn {
    width: 100%;
    padding: 16px;
    background: #4CAF50;
    color: #fff;
    border: none;
    border-radius: 16px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn:hover:not(:disabled) {
    background: #388E3C;
    transform: translateY(-1px);
}

.btn:disabled {
    background: #1b5e20;
    opacity: 0.5;
    cursor: not-allowed;
}

.qr-container {
    margin-top: 20px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
}

.qr-label {
    font-size: 13px;
    color: #9e9e9e;
    margin-bottom: 12px;
}

.payment-status {
    margin-top: 12px;
    font-size: 13px;
    color: #81C784;
}

.footer {
    margin-top: 24px;
}

.free-link {
    font-size: 13px;
    color: #616161;
    cursor: pointer;
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color 0.2s;
}

.free-link:hover {
    color: #9e9e9e;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.loading {
    animation: pulse 1.5s ease-in-out infinite;
}