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

:root {
    --bg-primary: #0a0a0b;
    --bg-secondary: #141416;
    --bg-tertiary: #1c1c1f;
    --bg-hover: #242428;
    --border-color: #2a2a2e;
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --accent-color: #8b5cf6;
    --accent-hover: #7c3aed;
    --success-color: #22c55e;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
}

/* Main Container */
.container {
    display: grid;
    grid-template-columns: 40fr 60fr;
    min-height: 100vh;
    gap: 1px;
    background-color: var(--border-color);
}

/* Panels */
.panel {
    background-color: var(--bg-primary);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.panel h2 {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Upload Section */
.upload-section {
    flex-shrink: 0;
}

.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    background-color: var(--bg-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-area:hover {
    border-color: var(--accent-color);
    background-color: var(--bg-tertiary);
}

.upload-area.drag-over {
    border-color: var(--accent-color);
    background-color: rgba(139, 92, 246, 0.1);
}

.upload-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    padding: 32px;
    text-align: center;
}

.upload-placeholder svg {
    color: var(--text-muted);
}

.upload-placeholder p {
    font-size: 14px;
}

.upload-hint {
    font-size: 12px;
    color: var(--text-muted);
}

/* Upload Progress */
.upload-progress {
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 32px;
    width: 100%;
}

.upload-progress.active {
    display: flex;
}

.progress-bar {
    width: 100%;
    max-width: 200px;
    height: 4px;
    background-color: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--accent-color);
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Preview Container */
.preview-container {
    display: none;
    position: relative;
    width: 100%;
    padding: 16px;
}

.preview-container.active {
    display: block;
}

.preview-container img {
    width: 100%;
    max-height: 180px;
    object-fit: contain;
    border-radius: 8px;
}

.remove-image {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, 0.7);
    border: none;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s ease;
}

.remove-image:hover {
    background-color: var(--error-color);
}

/* Prompt Section */
.prompt-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.prompt-section label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

.prompt-wrapper {
    position: relative;
}

.prompt-wrapper textarea {
    width: 100%;
    padding: 16px;
    padding-right: 48px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    resize: vertical;
    min-height: 120px;
    transition: border-color 0.2s ease;
}

.prompt-wrapper textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.prompt-wrapper textarea::placeholder {
    color: var(--text-muted);
}

.magic-wand-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.magic-wand-btn:hover {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
}

.magic-wand-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.magic-wand-btn.loading svg {
    animation: spin 1s linear infinite;
}

.prompt-hint {
    font-size: 12px;
    color: var(--text-muted);
}

/* Input Actions */
.input-actions {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 8px;
    margin-top: auto;
}

/* Reset Button */
.reset-btn {
    padding: 16px 20px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

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

/* Generate Button */
.generate-btn {
    padding: 16px 24px;
    background-color: var(--accent-color);
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.generate-btn:hover:not(:disabled) {
    background-color: var(--accent-hover);
}

.generate-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.generate-btn .btn-loading {
    display: none;
    align-items: center;
    gap: 8px;
}

.generate-btn.loading .btn-text {
    display: none;
}

.generate-btn.loading .btn-loading {
    display: flex;
}

/* Spinner */
.spinner {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Result Panel */
.result-panel {
    background-color: var(--bg-secondary);
}

/* Empty State */
.empty-state {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    color: var(--text-muted);
    text-align: center;
}

.empty-state.hidden {
    display: none;
}

.empty-state svg {
    opacity: 0.5;
}

.empty-state p {
    font-size: 14px;
}

/* Loading State */
.loading-state {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 20px;
    color: var(--text-secondary);
    text-align: center;
}

.loading-state.hidden {
    display: none;
}

.loading-state .spinner {
    width: 64px;
    height: 64px;
    border: 4px solid var(--bg-secondary);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-state p {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    margin: 0;
}

.loading-state .loading-subtext {
    font-size: 13px;
    color: var(--text-muted);
}

/* Result Display */
.result-display {
    display: none;
    flex-direction: column;
    gap: 16px;
    flex: 1;
}

.result-display.active {
    display: flex;
}

.result-image-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-tertiary);
    border-radius: 12px;
    overflow: hidden;
    min-height: 200px;
    max-height: 400px;
}

.result-image-container img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

/* Download Button */
.download-btn {
    width: 100%;
    padding: 14px 24px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s ease;
}

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

/* Action Buttons */
.action-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.action-btn {
    padding: 12px 16px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s ease;
}

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

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 1000;
}

.toast {
    padding: 14px 20px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideIn 0.3s ease;
    max-width: 360px;
}

.toast.success {
    border-color: var(--success-color);
}

.toast.error {
    border-color: var(--error-color);
}

.toast.warning {
    border-color: var(--warning-color);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto;
    }

    .panel {
        padding: 20px;
    }

    .upload-area {
        min-height: 150px;
    }

    .input-actions {
        grid-template-columns: 1fr;
    }

    .action-buttons {
        grid-template-columns: 1fr;
    }
}