/* RASCAL-FAB Clean UI - Chat-Centric Design */
:root {
    --rascal-black: #0f0f0f;
    --rascal-iron: #1a1a1a;
    --rascal-steel: #2a2a2a;
    --rascal-graphite: #888888;
    --rascal-mint: #00ff88;
    --rascal-teal: #00ccaa;
    --rascal-gold: #ffd700;
}

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

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    background: linear-gradient(135deg, var(--rascal-black) 0%, #1a1a1a 100%);
    color: var(--rascal-mint);
    min-height: 100vh;
    overflow-x: hidden;
}

.rascal-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.rascal-header {
    text-align: center;
    margin-bottom: 40px;
    padding: 20px 0;
}

.rascal-header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -1px;
}

.gradient-text {
    background: linear-gradient(45deg, var(--rascal-mint), var(--rascal-teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

.rascal-header p {
    font-size: 1.1rem;
    color: var(--rascal-graphite);
    font-weight: 400;
}

/* Main Chat Interface */
.chat-interface {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Unified File Drop Zone */
.unified-drop-zone {
    background: var(--rascal-iron);
    border: 3px dashed var(--rascal-steel);
    border-radius: 20px;
    padding: 60px 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.unified-drop-zone:hover {
    border-color: var(--rascal-teal);
    background: rgba(0, 204, 170, 0.05);
    transform: translateY(-2px);
}

.unified-drop-zone.drag-hover {
    border-color: var(--rascal-mint);
    background: rgba(0, 255, 136, 0.1);
    transform: scale(1.02);
    box-shadow: 0 10px 30px rgba(0, 255, 136, 0.2);
}

.drop-zone-content h2 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--rascal-mint);
}

.drop-zone-content p {
    font-size: 1rem;
    color: var(--rascal-graphite);
    line-height: 1.5;
}

.drop-icon {
    font-size: 4rem;
    margin-bottom: 16px;
    opacity: 0.8;
}

/* File Selected State */
.file-selected {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.file-selected .file-icon {
    font-size: 3rem;
}

.file-selected h3 {
    font-size: 1.4rem;
    color: var(--rascal-mint);
    font-weight: 600;
}

.file-selected p {
    color: var(--rascal-teal);
    font-weight: 500;
}

/* Instruction Section */
.instruction-section {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

#instruction-input {
    background: var(--rascal-iron);
    border: 2px solid var(--rascal-steel);
    border-radius: 12px;
    padding: 16px;
    color: var(--rascal-mint);
    font-size: 1rem;
    font-family: inherit;
    resize: vertical;
    min-height: 60px;
    transition: border-color 0.3s ease;
}

#instruction-input:focus {
    outline: none;
    border-color: var(--rascal-teal);
    box-shadow: 0 0 0 3px rgba(0, 204, 170, 0.1);
}

#instruction-input::placeholder {
    color: var(--rascal-graphite);
}

.process-button {
    background: linear-gradient(135deg, var(--rascal-mint), var(--rascal-teal));
    color: var(--rascal-black);
    border: none;
    border-radius: 12px;
    padding: 16px 32px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.process-button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 255, 136, 0.3);
}

.process-button:active {
    transform: translateY(0);
}

.process-button:disabled {
    background: var(--rascal-steel);
    color: var(--rascal-graphite);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Chat Input Section */
.chat-input-section {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.chat-input-container {
    background: var(--rascal-iron);
    border: 2px solid var(--rascal-steel);
    border-radius: 16px;
    padding: 16px;
}

#chat-input {
    background: transparent;
    border: none;
    color: var(--rascal-mint);
    font-size: 1rem;
    font-family: inherit;
    resize: vertical;
    min-height: 60px;
    width: 100%;
    outline: none;
    margin-bottom: 12px;
}

#chat-input::placeholder {
    color: var(--rascal-graphite);
}

.input-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

.chat-send-button {
    background: linear-gradient(135deg, var(--rascal-teal), var(--rascal-mint));
    color: var(--rascal-black);
    border: none;
    border-radius: 8px;
    padding: 8px 16px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 80px;
}

.chat-send-button:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 204, 170, 0.3);
}

.generation-buttons {
    display: flex;
    gap: 8px;
}

.generation-button {
    background: linear-gradient(135deg, var(--rascal-steel), var(--rascal-graphite));
    color: var(--rascal-mint);
    border: 2px solid var(--rascal-steel);
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 60px;
}

.generation-button:disabled {
    background: var(--rascal-steel);
    color: var(--rascal-graphite);
    cursor: not-allowed;
    opacity: 0.5;
}

.stl-button:not(:disabled) {
    background: linear-gradient(135deg, var(--rascal-mint), var(--rascal-teal));
    color: var(--rascal-black);
    border-color: var(--rascal-teal);
}

.stl-button:hover:not(:disabled) {
    box-shadow: 0 4px 12px rgba(0, 255, 136, 0.3);
    transform: translateY(-1px);
}

.svg-button:not(:disabled) {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: white;
    border-color: #6366f1;
}

.svg-button:hover:not(:disabled) {
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
    transform: translateY(-1px);
}

/* Chat Focus State */
#chat-input:focus {
    border-color: var(--rascal-teal);
    box-shadow: 0 0 0 3px rgba(0, 204, 170, 0.1);
}

.chat-input-container:focus-within {
    border-color: var(--rascal-teal);
    box-shadow: 0 0 0 3px rgba(0, 204, 170, 0.1);
}

/* Chat Log */
.chat-log {
    background: rgba(26, 26, 26, 0.5);
    border-radius: 16px;
    padding: 20px;
    max-height: 600px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 20px;
}

.chat-log::-webkit-scrollbar {
    width: 6px;
}

.chat-log::-webkit-scrollbar-track {
    background: var(--rascal-steel);
    border-radius: 3px;
}

.chat-log::-webkit-scrollbar-thumb {
    background: var(--rascal-teal);
    border-radius: 3px;
}

/* Chat Messages */
.chat-message {
    background: var(--rascal-iron);
    border-radius: 12px;
    padding: 16px;
    border-left: 4px solid var(--rascal-teal);
    position: relative;
}

.chat-message.system-message {
    border-left-color: var(--rascal-mint);
}

.chat-message.user-message {
    border-left-color: #6366f1;
    background: rgba(99, 102, 241, 0.1);
}

.message-content {
    font-size: 1rem;
    line-height: 1.5;
    margin-bottom: 8px;
}

.message-time {
    font-size: 0.8rem;
    color: var(--rascal-graphite);
    text-align: right;
    opacity: 0.7;
}

/* Download Card */
.download-card {
    background: linear-gradient(135deg, var(--rascal-iron), var(--rascal-steel));
    border: 2px solid var(--rascal-teal);
    border-radius: 16px;
    padding: 24px;
    margin: 16px 0;
}

.download-header h3 {
    font-size: 1.4rem;
    color: var(--rascal-mint);
    margin-bottom: 16px;
    text-align: center;
}

.file-details {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--rascal-steel);
}

.detail-row:last-child {
    border-bottom: none;
}

.detail-row span:first-child {
    color: var(--rascal-graphite);
}

.detail-row span:last-child {
    color: var(--rascal-mint);
    font-weight: 600;
}

.download-btn {
    display: block;
    width: 100%;
    background: linear-gradient(135deg, var(--rascal-mint), var(--rascal-teal));
    color: var(--rascal-black);
    text-decoration: none;
    text-align: center;
    padding: 16px;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 700;
    transition: all 0.3s ease;
    margin-bottom: 16px;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 255, 136, 0.3);
}

.analysis-text {
    background: var(--rascal-black);
    padding: 16px;
    border-radius: 8px;
    border-left: 4px solid var(--rascal-mint);
    font-size: 0.9rem;
    line-height: 1.5;
    white-space: pre-line;
}

/* File Preview Styles */
.file-preview-section {
    margin: 16px 0;
    border: 2px dashed var(--rascal-steel);
    border-radius: 8px;
    padding: 8px;
    background: rgba(0, 0, 0, 0.2);
}

.preview-placeholder {
    width: 100%;
    height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--rascal-black);
    border-radius: 6px;
}

.preview-loading {
    color: var(--rascal-graphite);
    font-size: 0.9rem;
}

.preview-error {
    color: #ff6b6b;
    font-size: 0.8rem;
}

.file-preview-thumbnail {
    max-width: 100%;
    max-height: 140px;
    border-radius: 6px;
    cursor: pointer;
    transition: transform 0.2s ease;
    object-fit: contain;
}

.file-preview-thumbnail:hover {
    transform: scale(1.05);
}

.download-actions {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.preview-btn {
    flex: 1;
    background: linear-gradient(135deg, var(--rascal-steel), var(--rascal-graphite));
    color: var(--rascal-mint);
    border: 1px solid var(--rascal-teal);
    padding: 10px 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    text-decoration: none;
    text-align: center;
    display: inline-block;
}

.preview-btn:hover {
    background: linear-gradient(135deg, var(--rascal-graphite), var(--rascal-steel));
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 255, 136, 0.2);
}

.download-btn {
    flex: 2;
}

/* Preview Modal Styles */
.preview-modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    align-items: center;
    justify-content: center;
}

.preview-modal-content {
    background: linear-gradient(135deg, var(--rascal-iron), var(--rascal-steel));
    border: 2px solid var(--rascal-teal);
    border-radius: 16px;
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.preview-modal-header {
    padding: 20px;
    border-bottom: 1px solid var(--rascal-steel);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.preview-modal-header h3 {
    color: var(--rascal-mint);
    margin: 0;
    font-size: 1.2rem;
}

.modal-close {
    background: none;
    border: none;
    color: var(--rascal-mint);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease;
}

.modal-close:hover {
    background: rgba(255, 107, 107, 0.2);
}

.preview-modal-body {
    flex: 1;
    padding: 20px;
    overflow: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
}

.modal-preview-image {
    max-width: 100%;
    max-height: 100%;
    border-radius: 8px;
    transition: transform 0.2s ease;
    object-fit: contain;
}

.svg-preview {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.svg-preview svg {
    max-width: 100%;
    max-height: 100%;
}

.loading-spinner {
    color: var(--rascal-graphite);
    font-size: 1.1rem;
}

.preview-modal-footer {
    padding: 20px;
    border-top: 1px solid var(--rascal-steel);
}

.preview-controls {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.preview-controls button {
    background: linear-gradient(135deg, var(--rascal-steel), var(--rascal-graphite));
    color: var(--rascal-mint);
    border: 1px solid var(--rascal-teal);
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

.preview-controls button:hover {
    background: linear-gradient(135deg, var(--rascal-graphite), var(--rascal-steel));
    transform: translateY(-1px);
}

/* Help Section */
.help-section {
    margin: 12px 0;
}

.help-toggle {
    font-size: 0.9rem;
    color: var(--rascal-mint);
    cursor: pointer;
    padding: 8px 12px;
    background: rgba(0, 204, 170, 0.1);
    border: 1px solid var(--rascal-teal);
    border-radius: 8px;
    text-align: center;
    transition: all 0.3s ease;
}

.help-toggle:hover {
    background: rgba(0, 204, 170, 0.2);
    transform: translateY(-1px);
}

.help-content {
    display: none;
    background: rgba(26, 26, 26, 0.8);
    border: 1px solid var(--rascal-steel);
    border-radius: 8px;
    padding: 16px;
    margin-top: 8px;
    font-size: 0.85rem;
    line-height: 1.4;
}

.help-item {
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--rascal-steel);
}

.help-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.help-item strong {
    color: var(--rascal-mint);
    display: block;
    margin-bottom: 4px;
}

/* File List for Multiple Downloads */
.file-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin: 16px 0;
}

.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(26, 26, 26, 0.3);
    border: 1px solid var(--rascal-steel);
    border-radius: 8px;
    padding: 12px 16px;
}

.download-btn.mini {
    width: auto;
    padding: 8px 16px;
    font-size: 0.9rem;
    border-radius: 8px;
    min-width: 120px;
}

/* Reset Button */
.reset-button {
    background: linear-gradient(135deg, var(--rascal-steel), var(--rascal-graphite));
    color: var(--rascal-mint);
    border: 2px solid var(--rascal-teal);
    border-radius: 12px;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

.reset-button:hover {
    background: linear-gradient(135deg, var(--rascal-teal), var(--rascal-mint));
    color: var(--rascal-black);
    transform: translateY(-2px);
}

/* Feedback Prompt */
.feedback-prompt {
    background: rgba(0, 204, 170, 0.1);
    border: 2px solid var(--rascal-teal);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
}

.feedback-prompt h4 {
    color: var(--rascal-mint);
    margin-bottom: 16px;
    font-size: 1.2rem;
}

.star-rating {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 16px;
    font-size: 1.8rem;
}

.star {
    cursor: pointer;
    transition: all 0.2s ease;
    opacity: 0.3;
}

.star:hover,
.star.active {
    opacity: 1;
    transform: scale(1.2);
}

.feedback-prompt textarea {
    width: 100%;
    background: var(--rascal-iron);
    border: 2px solid var(--rascal-steel);
    border-radius: 8px;
    padding: 12px;
    color: var(--rascal-mint);
    font-family: inherit;
    margin-bottom: 16px;
    resize: vertical;
}

.feedback-prompt textarea:focus {
    outline: none;
    border-color: var(--rascal-teal);
}

.feedback-submit {
    background: var(--rascal-teal);
    color: var(--rascal-black);
    border: none;
    border-radius: 8px;
    padding: 10px 20px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.feedback-submit:hover {
    background: var(--rascal-mint);
    transform: translateY(-2px);
}

/* Footer */
.rascal-footer {
    text-align: center;
    padding: 40px 20px 20px;
    color: var(--rascal-graphite);
    font-size: 0.9rem;
    border-top: 1px solid var(--rascal-steel);
    margin-top: 40px;
}

.copyright-notice {
    margin-top: 20px;
    padding: 16px;
    background: rgba(26, 26, 26, 0.6);
    border: 1px solid var(--rascal-steel);
    border-radius: 8px;
    font-size: 0.75rem;
    line-height: 1.4;
    color: var(--rascal-graphite);
}

.copyright-notice p {
    margin: 6px 0;
}

.copyright-notice p:first-child {
    color: var(--rascal-mint);
    font-weight: 600;
}

/* Responsive Design */
@media (max-width: 768px) {
    .rascal-container {
        padding: 16px;
    }
    
    .rascal-header h1 {
        font-size: 2.2rem;
    }
    
    .unified-drop-zone {
        padding: 40px 20px;
    }
    
    .drop-zone-content h2 {
        font-size: 1.4rem;
    }
    
    .drop-icon {
        font-size: 3rem;
    }
    
    .instruction-section {
        gap: 12px;
    }
    
    .process-button {
        padding: 14px 24px;
        font-size: 1rem;
    }
    
    .input-actions {
        flex-direction: column;
        gap: 12px;
        align-items: stretch;
    }
    
    .generation-buttons {
        justify-content: center;
        gap: 12px;
    }
    
    .generation-button {
        flex: 1;
        max-width: 120px;
    }
}

@media (max-width: 480px) {
    .rascal-header h1 {
        font-size: 1.8rem;
    }
    
    .unified-drop-zone {
        padding: 30px 16px;
    }
    
    .drop-zone-content h2 {
        font-size: 1.2rem;
    }
    
    .chat-log {
        padding: 16px;
    }
    
    .download-card {
        padding: 20px;
    }
    
    .star-rating {
        font-size: 1.5rem;
        gap: 4px;
    }
    
    .chat-input-container {
        padding: 12px;
    }
    
    #chat-input {
        min-height: 80px;
        font-size: 0.9rem;
    }
    
    .generation-button {
        padding: 8px 10px;
        font-size: 0.8rem;
        min-width: 50px;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.chat-message {
    animation: fadeInUp 0.4s ease-out;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.process-button:disabled {
    animation: pulse 2s infinite;
}