:root {
    --bg-color: #0f111a;
    --card-bg: rgba(23, 25, 35, 0.7);
    --primary: #635bff;
    --primary-hover: #7a73ff;
    --text-main: #ffffff;
    --text-muted: #a0aec0;
    --border: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.05);
    --danger: #ef4444;
    --success: #10b981;
    --radius: 16px;
    --font-family: 'Outfit', sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    overflow-x: hidden;
    padding: 2rem;
}

/* Background Blobs */
.background-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 10s infinite ease-in-out;
}

.blob-1 {
    width: 400px;
    height: 400px;
    background: #635bff;
    top: -50px;
    left: -100px;
}

.blob-2 {
    width: 300px;
    height: 300px;
    background: #00d4ff;
    bottom: 100px;
    right: -50px;
    animation-delay: -2s;
}

.blob-3 {
    width: 250px;
    height: 250px;
    background: #ff00bf;
    top: 40%;
    left: 40%;
    opacity: 0.2;
    animation-delay: -5s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(30px, -30px); }
}

/* App Container */
.app-container {
    width: 100%;
    max-width: 1100px;
    z-index: 1;
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
    font-size: 2rem;
    color: var(--primary);
}

.logo h1 {
    color: var(--text-main);
    font-weight: 700;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Cards & Layout */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    margin-bottom: 1.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.config-section h2, .section-header h2, .output-section h2 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-main);
}

.split-view {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 900px) {
    .split-view {
        grid-template-columns: 1fr;
    }
}

/* Inputs */
.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 1rem;
    color: var(--text-muted);
    font-size: 1.2rem;
    pointer-events: none;
}

input[type="text"] {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 1rem 1rem 1rem 3rem;
    border-radius: 12px;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.2s;
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 91, 255, 0.2);
}

.hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* Stripe Elements */
.stripe-input {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border);
    padding: 1rem;
    border-radius: 12px;
    margin-bottom: 0.5rem;
}

.StripeElement--focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 91, 255, 0.2);
}

.StripeElement--invalid {
    border-color: var(--danger);
}

#card-errors {
    color: var(--danger);
    font-size: 0.9rem;
    margin-top: 0.5rem;
    min-height: 20px;
}

/* Buttons */
.btn {
    cursor: pointer;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 12px;
    font-family: inherit;
    font-weight: 600;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary);
    color: white;
    width: 100%;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 91, 255, 0.3);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-main);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
}

.btn-ghost {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

.btn-ghost:hover {
    color: var(--text-main);
    border-color: var(--text-muted);
}

.test-cards {
    margin-top: 2rem;
    margin-bottom: 2rem;
}

.test-cards h3 {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.8rem;
}

.test-card-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    padding: 0.8rem;
    border-radius: 10px;
    cursor: pointer;
    text-align: left;
    transition: all 0.2s;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    gap: 4px;
    position: relative;
    overflow: hidden;
}

.test-card-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--primary);
}

.test-card-btn i {
    position: absolute;
    top: 8px;
    right: 8px;
    opacity: 0;
    transition: opacity 0.2s;
}

.test-card-btn:hover i {
    opacity: 1;
}

.card-brand {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-main);
}

.card-number {
    font-family: monospace;
    font-size: 0.9rem;
}

.hint-text {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.8rem;
    font-style: italic;
}

/* Console Output */
.console-window {
    background: #000;
    border-radius: 8px;
    border: 1px solid var(--border);
    height: 400px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.console-header {
    background: #1a1a1a;
    padding: 0.8rem;
    display: flex;
    gap: 6px;
    border-bottom: 1px solid var(--border);
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.red { background: #ff5f56; }
.yellow { background: #ffbd2e; }
.green { background: #27c93f; }

pre {
    padding: 1rem;
    color: #00ff9d;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9rem;
    overflow-y: auto;
    flex: 1;
    white-space: pre-wrap;
    line-height: 1.4;
}

/* Utilities */
.disabled {
    opacity: 0.5;
    pointer-events: none;
    filter: grayscale(1);
}

.hidden {
    display: none;
}

.badge {
    background: rgba(255, 189, 46, 0.2);
    color: #ffbd2e;
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-main);
    color: var(--bg-color);
    padding: 0.8rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 100;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}