:root {
    --primary: #2563eb;
    --primary-glow: rgba(37, 99, 235, 0.4);
    --primary-soft: rgba(37, 99, 235, 0.1);
    --secondary: #6366f1;
    --bg: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --border: rgba(255, 255, 255, 0.1);
    --success: #10b981;
    --error: #ef4444;
    --radius: 16px;
    --font: 'Outfit', sans-serif;
}

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

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--font);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

.glow-bg {
    position: fixed;
    top: -10%;
    left: -10%;
    width: 120%;
    height: 120%;
    background: radial-gradient(circle at 20% 30%, rgba(37, 99, 235, 0.15) 0%, transparent 40%),
                radial-gradient(circle at 80% 70%, rgba(99, 102, 241, 0.15) 0%, transparent 40%);
    z-index: -1;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 4px 15px var(--primary-glow);
}

.logo span span {
    color: var(--primary);
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-link:hover {
    color: var(--text);
}

main {
    animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.test-panel {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 2rem;
}

.card {
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.glass {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.card-header {
    margin-bottom: 2rem;
}

.card-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.card-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.card-header p {
    color: var(--text-muted);
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
}

.required {
    color: var(--error);
}

input {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border);
    padding: 0.75rem 1rem;
    border-radius: 10px;
    color: white;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s;
}

input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-soft);
    background: rgba(0, 0, 0, 0.3);
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 1rem;
}

.btn-primary {
    width: 100%;
    background: var(--primary);
    color: white;
    border: none;
    padding: 1rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 1rem;
}

.btn-primary:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px var(--primary-glow);
}

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

.btn-secondary {
    display: block;
    text-align: center;
    background: var(--secondary);
    color: white;
    text-decoration: none;
    padding: 0.75rem;
    border-radius: 10px;
    font-weight: 600;
    margin-top: 1rem;
    transition: all 0.3s;
}

.btn-secondary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.btn-outline {
    width: 100%;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
    padding: 0.75rem;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

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

.results-column {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.result-card {
    flex: 1;
}

.status-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    background: var(--border);
    color: var(--text-muted);
}

.status-success {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success);
}

.status-error {
    background: rgba(239, 68, 68, 0.2);
    color: var(--error);
}

.placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 0;
    color: var(--text-muted);
    text-align: center;
}

.placeholder svg {
    width: 48px;
    height: 48px;
    margin-bottom: 1rem;
    opacity: 0.3;
}

.hidden {
    display: none;
}

.payment-link-box {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 1.5rem;
    border: 1px dashed var(--primary);
}

.link-input {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
    margin-bottom: 1rem;
}

.link-input input {
    background: rgba(255, 255, 255, 0.05);
    font-size: 0.9rem;
}

.copy-btn {
    background: var(--primary-soft);
    border: 1px solid var(--primary);
    color: var(--primary);
    width: 44px;
    height: 44px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}

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

.json-output {
    max-height: 200px;
    overflow-y: auto;
}

pre {
    background: #000;
    padding: 1rem;
    border-radius: 8px;
    font-family: monospace;
    font-size: 0.85rem;
    margin-top: 0.5rem;
    color: #a5f3fc;
}

footer {
    margin-top: 4rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    padding-bottom: 2rem;
}

/* Loader */
.loader {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
    display: none;
}

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

@media (max-width: 868px) {
    .test-panel {
        grid-template-columns: 1fr;
    }
}