:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --secondary: #10b981;
    --bg-dark: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-main: #f8fafc;
    --text-dim: #94a3b8;
    --danger: #ef4444;
    --success: #10b981;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Inter", sans-serif;
}

[v-cloak] {
    display: none;
}

body {
    background-color: var(--bg-dark);
    background-image:
        radial-gradient(
            circle at 0% 0%,
            rgba(99, 102, 241, 0.15) 0%,
            transparent 40%
        ),
        radial-gradient(
            circle at 100% 100%,
            rgba(16, 185, 129, 0.1) 0%,
            transparent 40%
        );
    background-attachment: fixed;
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

#app {
    width: 100%;
    max-width: 500px;
    perspective: 1000px;
}

.payment-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 40px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    animation: card-entry 0.6s ease-out;
}

@keyframes card-entry {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.header {
    text-align: center;
    margin-bottom: 32px;
}

.header h1 {
    font-family: "Outfit", sans-serif;
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #fff 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header p {
    color: var(--text-dim);
    font-size: 14px;
}

.logo-container {
    display: flex;
    justify-content: center;
    margin-bottom: 24px;
}

.logo {
    max-height: 64px;
    width: auto;
    filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.2));
    transition: var(--transition);
}

.logo:hover {
    transform: scale(1.05);
}

.submit-btn {
    width: 100%;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 14px;
    padding: 18px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 10px 20px -5px rgba(99, 102, 241, 0.4);
}

.submit-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 15px 25px -5px rgba(99, 102, 241, 0.5);
}

.branding {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 24px;
    opacity: 0.6;
    transition: var(--transition);
}

.branding:hover {
    opacity: 1;
}

.branding span {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.branding i {
    color: #635bff;
    font-size: 32px;
}

.stripe-logo {
    font-family: "Outfit", sans-serif;
    font-weight: 700;
    font-size: 24px;
    color: #fff;
    letter-spacing: -0.02em;
}

@media (max-width: 480px) {
    .payment-card {
        padding: 24px;
    }
    .header h1 {
        font-size: 24px;
    }
}