: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;
}

/* Glassmorphism Card */
.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: 80px;
    width: auto;
    filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.2));
    transition: var(--transition);
}

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

/* Mode Badge */
.mode-badge {
    position: absolute;
    top: 4px;
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 12px;
    border-radius: 8px;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: 1px solid transparent;
    z-index: 10;
}

.mode-badge.test {
    background: rgba(245, 158, 11, 0.1);
    color: #f59e0b;
    border-color: rgba(245, 158, 11, 0.2);
}

.mode-badge.live {
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
    border-color: rgba(16, 185, 129, 0.2);
}

/* Payment Type Tabs */
.tabs {
    display: flex;
    background: rgba(15, 23, 42, 0.4);
    border-radius: 12px;
    padding: 4px;
    margin-bottom: 24px;
    border: 1px solid var(--card-border);
}

.tab {
    flex: 1;
    padding: 10px;
    text-align: center;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dim);
    transition: var(--transition);
}

.tab.active {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* Amount Selection */
.section-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dim);
    margin-bottom: 12px;
    display: block;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.amount-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 20px;
    margin-top: 20px;
}

.amount-btn {
    background: var(--glass-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 14px;
    color: var(--text-main);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.amount-btn .interval {
    font-size: 10px;
    font-weight: 400;
    color: var(--text-dim);
}

.amount-btn:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
}

.amount-btn.active {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--primary);
    color: var(--primary);
}

.custom-amount-container {
    margin-bottom: 24px;
    position: relative;
}

.custom-amount-input {
    width: 100%;
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 16px 16px 16px 40px;
    color: var(--text-main);
    font-size: 18px;
    font-weight: 600;
    outline: none;
    transition: var(--transition);
}

.custom-amount-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.1);
}

.currency-symbol,
.input-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-dim);
    font-size: 18px;
    font-weight: 600;
}

.input-icon {
    font-size: 16px;
}

.field-container {
    margin-bottom: 24px;
    position: relative;
}

.text-input {
    width: 100%;
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 16px 16px 16px 44px;
    color: var(--text-main);
    font-size: 16px;
    font-weight: 500;
    outline: none;
    transition: var(--transition);
}

.text-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.1);
}

.text-input.error {
    border-color: var(--danger);
}

/* Currency Select */
.currency-select {
    width: 100%;
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 16px;
    color: var(--text-main);
    font-size: 16px;
    font-weight: 500;
    outline: none;
    transition: var(--transition);
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%2394a3b8' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 12px center;
    background-repeat: no-repeat;
    background-size: 16px;
    cursor: pointer;
}

.currency-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.1);
}

/* Interval Selector */
.interval-selector {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.interval-btn {
    background: var(--glass-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-dim);
    cursor: pointer;
    transition: var(--transition);
}

.interval-btn.active {
    border-color: var(--secondary);
    color: var(--secondary);
    background: rgba(16, 185, 129, 0.05);
}

/* Stripe Element */
.stripe-container {
    margin-bottom: 32px;
}

#card-element {
    padding: 16px;
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    transition: var(--transition);
}

#card-element.StripeElement--focus {
    border-color: var(--primary);
}

.error-message {
    color: var(--danger);
    font-size: 12px;
    margin-top: 8px;
    min-height: 18px;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Submit Button */
.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:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 15px 25px -5px rgba(99, 102, 241, 0.5);
}

.submit-btn:active:not(:disabled) {
    transform: translateY(0);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background: #475569;
    box-shadow: none;
}

.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Status Toast */
.toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: 16px 24px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
    transition:
        transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275),
        opacity 0.3s;
    z-index: 1000;
    width: calc(100% - 40px);
    max-width: 400px;
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
}

.toast.visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    pointer-events: all;
    visibility: visible;
}

.toast.success {
    background: #064e3b;
    border: 1px solid #10b981;
    color: #d1fae5;
}

.toast.error {
    background: #450a0a;
    border: 1px solid #ef4444;
    color: #fee2e2;
}

.toast i {
    font-size: 20px;
}

/* Branding */
.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;
    /* Stripe Purple */
    font-size: 32px;
}

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

/* Mobile Adjustments */
@media (max-width: 480px) {
    .payment-card {
        padding: 24px;
    }

    .header h1 {
        font-size: 24px;
    }

    .amount-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}