:root {
    --bg-color: #0c0c0e;
    --card-bg: rgba(24, 24, 27, 0.7);
    --border-color: rgba(63, 63, 70, 0.5);
    --text-primary: #f4f4f5;
    --text-secondary: #a1a1aa;
    --accent: #6366f1;
    --accent-glow: rgba(99, 102, 241, 0.4);
    --success: #22c55e;
    --error: #ef4444;
    --input-bg: rgba(39, 39, 42, 0.5);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(124, 58, 237, 0.1) 0%, transparent 40%);
}

.container {
    width: 100%;
    max-width: 600px;
    animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 3rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(to right, #818cf8, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
    letter-spacing: -0.025em;
}

.header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.user-info-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.25rem;
    border-radius: 99px;
    margin-bottom: 2rem;
    font-size: 0.85rem;
}

.user-actions {
    display: flex;
    gap: 1.25rem;
    align-items: center;
}

.user-actions a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s;
    display: flex;
    align-items: center;
}

.user-actions a:hover {
    color: var(--text-primary);
    transform: translateY(-1px);
}

.user-actions i {
    width: 20px;
    height: 20px;
}

.upgrade-link {
    color: var(--accent) !important;
    font-weight: 600;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-left: 0.25rem;
}

input[type="text"],
input[type="email"],
input[type="password"],
textarea {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0.875rem 1rem;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.2s ease;
    outline: none;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-glow);
    background: rgba(39, 39, 42, 0.8);
}

textarea {
    resize: vertical;
    min-height: 120px;
}

.submit-btn {
    width: 100%;
    background: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    color: white;
    border: none;
    border-radius: 12px;
    padding: 1rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 1rem;
    box-shadow: 0 10px 15px -3px rgba(99, 102, 241, 0.3);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 25px -5px rgba(99, 102, 241, 0.4);
    filter: brightness(1.1);
}

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

.status-message {
    padding: 1rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: slideDown 0.4s ease-out;
}

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

.status-success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.2);
    color: var(--success);
}

.status-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: var(--error);
}

.footer-text {
    text-align: center;
    margin-top: 2rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.preview-container {
    margin-top: 1.5rem;
    background: #ffffff;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    animation: fadeIn 0.5s ease-out;
}

.preview-header {
    background: #f8fafc;
    padding: 0.6rem 1rem;
    border-bottom: 1px solid #e2e8f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.preview-header span {
    font-size: 0.75rem;
    font-weight: 600;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

#htmlPreview {
    width: 100%;
    height: 300px;
    border: none;
    display: block;
}

@media (max-width: 640px) {
    body {
        padding: 1rem;
    }
    .card {
        padding: 1.5rem;
        border-radius: 16px;
    }
    .header h1 {
        font-size: 2rem;
    }
}