/* === CSS Variables === */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #16161f;
    --bg-input: #1c1c28;
    --border-color: #2a2a3a;
    --border-focus: #6366f1;
    
    --text-primary: #f1f1f4;
    --text-secondary: #9393a8;
    --text-muted: #5c5c72;
    
    --accent-primary: #6366f1;
    --accent-secondary: #818cf8;
    --accent-glow: rgba(99, 102, 241, 0.3);
    
    --success: #22c55e;
    --success-bg: rgba(34, 197, 94, 0.1);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --danger: #ef4444;
    
    --nitro-color: #00d4ff;
    --prolific-color: #ff6b35;
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 40px var(--accent-glow);
}

/* === Lock Screen === */
.lock-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.lock-container {
    text-align: center;
    padding: 3rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    max-width: 400px;
    width: 90%;
}

.lock-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.lock-logo .logo-icon {
    font-size: 2.5rem;
}

.lock-logo .logo-text {
    font-size: 1.75rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.lock-message {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.lock-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.lock-form input {
    text-align: center;
    font-size: 1.1rem;
    letter-spacing: 2px;
    padding: 1rem;
}

.lock-btn {
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--accent-primary) 0%, #4f46e5 100%);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.lock-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
}

.lock-error {
    color: var(--danger);
    margin-top: 1rem;
    font-size: 0.9rem;
    min-height: 1.5rem;
}

.lock-screen.hidden {
    display: none;
}

/* === Reset & Base === */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* === App Container === */
.app {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* === Header === */
.header {
    text-align: center;
    margin-bottom: 3rem;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.logo-icon {
    font-size: 2.5rem;
}

.logo-text {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.admin-link {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.5rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--accent-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.admin-link:hover {
    background: var(--bg-input);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* === Cards === */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-card);
    overflow: hidden;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.card-header h2 {
    font-size: 1.15rem;
    font-weight: 600;
    flex: 1;
}

.header-actions {
    display: flex;
    gap: 0.5rem;
}

.step-badge {
    background: var(--accent-primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.step-badge.success {
    background: var(--success);
}

.step-badge.warning {
    background: var(--warning);
}

.card-body {
    padding: 1.5rem;
}

/* === Forms === */
.form-row {
    margin-bottom: 1.25rem;
}

.form-row:last-child {
    margin-bottom: 0;
}

.form-row.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

@media (max-width: 600px) {
    .form-row.two-col {
        grid-template-columns: 1fr;
    }
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

input, select, textarea {
    font-family: inherit;
    font-size: 1rem;
    padding: 0.85rem 1rem;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    transition: all 0.2s ease;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

input::placeholder, textarea::placeholder {
    color: var(--text-muted);
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%239393a8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

textarea {
    resize: vertical;
    min-height: 80px;
}

/* === Toggle Buttons === */
.button-group {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.button-group.small {
    gap: 0.5rem;
}

.toggle-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 1.25rem;
    background: var(--bg-input);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.toggle-btn.small {
    padding: 0.65rem 1rem;
    font-size: 0.875rem;
}

.toggle-btn:hover {
    border-color: var(--text-muted);
    color: var(--text-primary);
}

.toggle-btn.active {
    border-color: var(--accent-primary);
    background: var(--accent-glow);
    color: var(--text-primary);
}

.toggle-btn[data-value="nitro"].active {
    border-color: var(--nitro-color);
    background: rgba(0, 212, 255, 0.15);
}

.toggle-btn[data-value="prolific"].active {
    border-color: var(--prolific-color);
    background: rgba(255, 107, 53, 0.15);
}

.btn-icon {
    font-size: 1.1rem;
}

/* === Generate Button === */
.generate-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    width: 100%;
    padding: 1.15rem 2rem;
    background: linear-gradient(135deg, var(--accent-primary) 0%, #4f46e5 100%);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-family: inherit;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 2rem;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(99, 102, 241, 0.5);
}

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

.generate-btn .btn-icon {
    font-size: 1.3rem;
}

/* === Action Buttons === */
.action-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 0.85rem;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.action-btn:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.action-btn.copied {
    background: var(--success-bg);
    border-color: var(--success);
    color: var(--success);
}

/* === Output Section === */
.output-card {
    border-color: var(--success);
    box-shadow: 0 4px 30px rgba(34, 197, 94, 0.15);
}

.response-output {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    line-height: 1.8;
    white-space: pre-wrap;
    color: var(--text-primary);
    max-height: 500px;
    overflow-y: auto;
}

/* === Checklist === */
.checklist-card {
    border-color: var(--warning);
    box-shadow: 0 4px 30px rgba(245, 158, 11, 0.15);
}

.checklist-intro {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.checklist {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.checklist-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
}

.checklist-item:hover {
    border-color: var(--text-muted);
}

.checklist-item.checked {
    background: var(--success-bg);
    border-color: var(--success);
}

.checklist-checkbox {
    width: 22px;
    height: 22px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.2s ease;
}

.checklist-item.checked .checklist-checkbox {
    background: var(--success);
    border-color: var(--success);
}

.checklist-checkbox::after {
    content: '✓';
    color: white;
    font-size: 0.85rem;
    font-weight: 700;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.checklist-item.checked .checklist-checkbox::after {
    opacity: 1;
}

.checklist-content {
    flex: 1;
}

.checklist-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.checklist-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* === Footer === */
.footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

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

.card {
    animation: fadeIn 0.4s ease;
}

#outputSection, #checklistSection {
    animation: fadeIn 0.5s ease;
}

/* === Scrollbar === */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* === Stripe Fields Section === */
.output-intro {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.stripe-field {
    margin-bottom: 1.25rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.stripe-field:last-child {
    margin-bottom: 0;
}

.stripe-field.full-response {
    border-color: var(--accent-primary);
    margin-top: 2rem;
}

.stripe-field-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background: var(--bg-input);
    border-bottom: 1px solid var(--border-color);
}

.field-label {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.copy-field-btn {
    padding: 0.4rem 0.75rem;
    background: var(--accent-primary);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.copy-field-btn:hover {
    background: var(--accent-secondary);
    transform: translateY(-1px);
}

.copy-field-btn.copied {
    background: var(--success);
}

.stripe-field-content {
    padding: 1rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    line-height: 1.7;
    white-space: pre-wrap;
    color: var(--text-primary);
    max-height: 300px;
    overflow-y: auto;
}

.full-response .stripe-field-content {
    max-height: 400px;
}

/* === Checklist Upload Info === */
.checklist-upload {
    font-size: 0.8rem;
    color: var(--accent-secondary);
    margin-top: 0.35rem;
}

/* === Screenshot Upload Section === */
.section-intro {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 1rem 0;
}

.upload-zone:hover {
    border-color: var(--accent-primary);
    background: rgba(99, 102, 241, 0.05);
}

.upload-zone.dragover {
    border-color: var(--accent-primary);
    background: rgba(99, 102, 241, 0.1);
}

.upload-prompt {
    pointer-events: none;
}

.upload-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 0.5rem;
}

.upload-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
    margin: 1rem 0;
}

.preview-item {
    position: relative;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
    aspect-ratio: 4/3;
}

.preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.preview-remove {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 24px;
    height: 24px;
    background: var(--danger);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-remove:hover {
    background: #dc2626;
}

.generate-btn.secondary {
    background: linear-gradient(135deg, var(--success) 0%, #16a34a 100%);
    box-shadow: 0 4px 20px rgba(34, 197, 94, 0.4);
}

.generate-btn.secondary:hover {
    box-shadow: 0 6px 30px rgba(34, 197, 94, 0.5);
}