:root {
    --bg-color: #0F1219;
    --surface-color: #1A1D24;
    --surface-hover: #232730;
    --primary-color: #D4AF37;
    --primary-hover: #E5C354;
    --text-main: #FFFFFF;
    --text-muted: #9BA3AF;
    --border-color: #2A2F3A;
    --error-color: #EF4444;
    --success-color: #10B981;
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;
    --transition: all 0.3s ease;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
}

.app-container {
    display: flex;
    width: 100%;
    min-height: 100vh;
}

/* Sidebar */
.visual-section {
    flex: 1;
    background: linear-gradient(135deg, rgba(11,14,20,0.9) 0%, rgba(15,18,25,0.7) 100%), url('https://images.unsplash.com/photo-1589829085413-56de8ae18c73?q=80&w=2112&auto=format&fit=crop') center/cover;
    position: relative;
    padding: 4rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    border-right: 1px solid var(--border-color);
}

.visual-section .brand h1 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    letter-spacing: 1px;
}

.visual-section .brand p {
    color: var(--text-muted);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.visual-section .value-prop h2 {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.visual-section .value-prop p {
    font-size: 1.125rem;
    color: var(--text-muted);
    max-width: 80%;
}

/* Form Section */
.form-section {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4rem;
    background-color: var(--bg-color);
    position: relative;
    overflow-y: auto;
}

.form-container {
    width: 100%;
    max-width: 550px;
    position: relative;
}

.progress-bar {
    width: 100%;
    height: 4px;
    background-color: var(--surface-color);
    border-radius: 2px;
    margin-bottom: 1rem;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--primary-color);
    width: 33.33%;
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.step-indicator {
    font-size: 0.875rem;
    color: var(--primary-color);
    margin-bottom: 3rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.form-step {
    display: none;
    animation: fadeIn 0.5s ease;
}

.form-step.active {
    display: block;
}

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

.form-step h2 {
    font-family: var(--font-heading);
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.subtitle {
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    font-size: 1rem;
}

.form-group {
    margin-bottom: 2rem;
}

.form-group label {
    display: block;
    margin-bottom: 1rem;
    font-weight: 500;
    font-size: 0.95rem;
    color: #E2E8F0;
}

/* Radio & Checkbox Cards */
.radio-group, .checkbox-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.radio-group.vertical {
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.checkbox-group {
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.radio-card, .checkbox-card {
    position: relative;
    cursor: pointer;
    display: block;
}

.radio-card input, .checkbox-card input {
    position: absolute;
    opacity: 0;
}

.card-content {
    display: flex;
    align-items: center;
    padding: 1rem 1.25rem;
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: var(--transition);
    font-size: 0.9rem;
    color: var(--text-muted);
}

.radio-card input:checked + .card-content,
.checkbox-card input:checked + .card-content {
    background-color: rgba(212, 175, 55, 0.1);
    border-color: var(--primary-color);
    color: var(--text-main);
}

.radio-card:hover .card-content,
.checkbox-card:hover .card-content {
    border-color: var(--text-muted);
}

/* Radio rows for vertical lists */
.radio-row {
    display: flex;
    align-items: center;
    padding: 1rem 1.25rem;
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.95rem;
}

.radio-row:hover {
    border-color: var(--text-muted);
}

.radio-row input {
    margin-right: 1rem;
    accent-color: var(--primary-color);
    width: 1.2rem;
    height: 1.2rem;
}

.radio-row:has(input:checked) {
    background-color: rgba(212, 175, 55, 0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Select */
.select-wrapper {
    position: relative;
}

.select-wrapper::after {
    content: '▼';
    position: absolute;
    right: 1.2rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
    font-size: 0.7rem;
}

select {
    width: 100%;
    appearance: none;
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 1rem 1.25rem;
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
}

select:focus {
    outline: none;
    border-color: var(--primary-color);
}

select option {
    background-color: var(--surface-color);
    color: var(--text-main);
}

/* Inputs */
.text-input {
    width: 100%;
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 1rem 1.25rem;
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.text-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1);
}

.text-input::placeholder {
    color: #4B5563;
}

/* Buttons */
.actions {
    margin-top: 3rem;
    display: flex;
    justify-content: flex-end;
}

.actions.split {
    justify-content: space-between;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 8px;
    font-family: inherit;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--bg-color);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -10px rgba(212, 175, 55, 0.5);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

.btn-outline:hover {
    background-color: var(--surface-color);
    border-color: var(--text-muted);
}

/* Error States */
.error-state {
    animation: shake 0.5s;
}

.error-state .radio-card,
.error-state .radio-row,
.error-state .checkbox-card,
.error-state .card-content {
    border-color: var(--error-color) !important;
}

.error-state select,
.error-state input[type="text"],
.error-state input[type="email"],
.error-state input[type="tel"] {
    border-color: var(--error-color);
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Warning & Success States */
.pf-warning, .success-state {
    text-align: center;
    padding: 2rem 0;
}

.icon-warning, .icon-success {
    font-size: 4rem;
    margin-bottom: 1.5rem;
}

.icon-success {
    color: var(--success-color);
}

.pf-warning p, .success-state p {
    color: var(--text-muted);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

/* Responsive */
@media (max-width: 992px) {
    .app-container {
        flex-direction: column;
    }
    
    .visual-section {
        padding: 3rem 2rem;
        min-height: 40vh;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .visual-section .value-prop h2 {
        font-size: 2.5rem;
    }
    
    .form-section {
        padding: 3rem 2rem;
    }
}