/** 
 * Notion / Google Docs inspired minimalist design system 
 */

:root {
    /* Color Palette - Light Theme */
    --bg-main: #fcfcfc;
    --bg-card: #ffffff;
    --bg-input: #f7f7f5;
    --bg-hover: #f1f1ef;
    
    --text-primary: #37352f;
    --text-secondary: #787774;
    --text-muted: #9f9e9a;
    
    --border-color: #e9e9e7;
    --border-focus: #2da1f8;
    
    --primary-action: #2383e2;
    --primary-action-hover: #1e70c1;
    --primary-action-text: #ffffff;

    /* Semantic Colors */
    --color-blue-ink: #0033a0;
    --color-black-ink: #222222;

    /* Shadow & Radii (Modern soft aesthetics) */
    --shadow-soft: 0 4px 12px rgba(0, 0, 0, 0.05);
    --shadow-inner: inset 0 2px 4px rgba(0,0,0,0.06);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-full: 9999px;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, "Apple Color Emoji", Arial, sans-serif;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

body.theme-dark {
    --bg-main: #191919;
    --bg-card: #202020;
    --bg-input: #2f2f2f;
    --bg-hover: #3a3a3a;
    
    --text-primary: #ffffff;
    --text-secondary: #a3a3a3;
    --text-muted: #737373;
    
    --border-color: #3b3b3b;
    --border-focus: #4b9cff;
    
    --primary-action: #4b9cff;
    --primary-action-hover: #3682de;
    --primary-action-text: #ffffff;
    
    --shadow-soft: 0 4px 12px rgba(0, 0, 0, 0.4);
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: transparent;
}

/* Typography Utilities */
.mb-16 { margin-bottom: 1rem; }
.mt-16 { margin-top: 1rem; }
.mt-20 { margin-top: 1.25rem; }
.mt-24 { margin-top: 1.5rem; }
.text-muted { color: var(--text-muted); }

/* Layout Structure */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 1.125rem;
}

.logo-icon {
    color: var(--primary-action);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.github-star-btn {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: background var(--transition-fast);
}

.github-star-btn:hover {
    background: var(--bg-hover);
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.hidden {
    display: none !important;
}

/* Dashboard Layout */
.dashboard-container {
    display: flex;
    flex: 1;
    gap: 1.5rem;
    padding: 1.5rem;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    align-items: stretch;
}

.panel {
    display: flex;
    flex-direction: column;
}

.col-input {
    flex: 1 1 50%;
}

.col-output {
    flex: 1 1 50%;
}

/* Shared Components & Styles */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
}

.shadow-soft { box-shadow: var(--shadow-soft); }
.rounded { border-radius: var(--radius-md); }
.flex-fill { flex: 1; }

.card-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.status-badge {
    font-size: 0.75rem;
    font-weight: 500;
    background: var(--primary-action);
    color: var(--primary-action-text);
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-full);
    animation: pulse 1.5s infinite;
}

/* Specific Sections: Drag & Drop */
.upload-area {
    border: 2px dashed var(--border-color);
    background-color: var(--bg-input);
    text-align: center;
    padding: 2.5rem 1rem;
    cursor: pointer;
    transition: border-color var(--transition-fast), background var(--transition-fast);
}

.upload-area:hover, .upload-area.drag-over {
    border-color: var(--primary-action);
    background-color: var(--bg-hover);
}

.upload-icon {
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.upload-text {
    font-weight: 500;
    font-size: 0.95rem;
    margin-bottom: 0.25rem;
}

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

.text-btn {
    color: var(--primary-action);
    font-weight: 500;
}

.text-btn:hover {
    text-decoration: underline;
}

/* Extracted Text Area */
.editor-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 250px;
}

.relative-wrapper {
    position: relative;
}

.notepad-input {
    flex: 1;
    width: 100%;
    resize: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 1rem;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.95rem;
    line-height: 1.6;
    background: transparent;
    color: var(--text-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.notepad-input:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 2px rgba(45, 161, 248, 0.2);
}

/* Settings Form Elements */
.settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.settings-row {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.select-wrapper {
    position: relative;
    width: 100%;
}

.modern-select {
    width: 100%;
    appearance: none;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    padding: 0.625rem 0.75rem;
    font-size: 0.9rem;
    cursor: pointer;
    font-family: var(--font-sans);
    transition: border-color var(--transition-fast);
}

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

.select-chevron {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    color: var(--text-secondary);
}

/* Color Swatches */
.swatch-container {
    display: flex;
    gap: 0.75rem;
}

.color-swatch {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid transparent;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.color-swatch:hover {
    transform: scale(1.1);
}

.color-swatch.active {
    box-shadow: 0 0 0 2px var(--bg-card), 0 0 0 4px var(--border-focus);
}

.swatch-blue { background-color: var(--color-blue-ink); }
.swatch-black { background-color: var(--color-black-ink); }

/* Slider */
.slider-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 0.5rem;
}

.slider-value {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary-action);
}

.modern-slider {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    outline: none;
    margin: 0.5rem 0;
}

.modern-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 2px solid var(--primary-action);
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform var(--transition-fast);
}

.modern-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.helper-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* Buttons */
.btn-primary {
    background-color: var(--primary-action);
    color: var(--primary-action-text);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}

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

.btn-primary:active {
    transform: scale(0.98);
}

.full-width {
    width: 100%;
}

.btn-secondary {
    background-color: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 0.375rem;
    transition: background-color var(--transition-fast);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--bg-hover);
}

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

.btn-icon {
    opacity: 0.8;
}

/* Preview Area */
.preview-window {
    flex: 1;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 250px;
    overflow: hidden;
    position: relative;
}

.preview-state {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.empty-state {
    color: var(--text-muted);
    text-align: center;
}

.empty-icon {
    margin-bottom: 0.75rem;
    opacity: 0.5;
}

.download-actions {
    display: flex;
    gap: 1rem;
}

/* Skeleton Loaders */
@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

.skeleton-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--bg-card);
    padding: 1rem;
    z-index: 10;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    border-radius: var(--radius-sm);
}

.skeleton-line {
    height: 12px;
    background: var(--bg-hover);
    border-radius: 4px;
    animation: pulse 1.5s infinite ease-in-out;
}

.skeleton-line.full { width: 100%; }
.skeleton-line.three-quarter { width: 75%; }
.skeleton-line.half { width: 50%; }
.skeleton-line.thick { height: 24px; width: 60%; margin-bottom: 1rem; }

.skeleton-state {
    background: var(--bg-input);
}

.skeleton-page {
    background: var(--bg-card);
    width: 80%;
    height: 90%;
    border-radius: 4px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin: auto;
}

/* Mock Generated Document */
.result-state {
    padding: 1.5rem;
}

.mock-generated-doc {
    width: 100%;
    height: 100%;
    background-color: #fdfaf6; /* Default paper */
    border-radius: 4px;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    position: relative;
    overflow: hidden;
}

.bg-lined {
    background-image: linear-gradient(#e5e5e5 1px, transparent 1px);
    background-size: 100% 1.5rem;
    background-position: 0 1.2rem;
}

.color-blue .written-text { color: var(--color-blue-ink); }
.color-black .written-text { color: var(--color-black-ink); }

.font-messy {
    font-family: 'Caveat', cursive, sans-serif;
    font-size: 1.5rem;
    line-height: 1.5rem;
    transform: rotate(-1deg);
}

/* Media Queries for Mobile Responsiveness */
@media (max-width: 768px) {
    .dashboard-container {
        flex-direction: column;
    }
    
    .settings-grid, .settings-row {
        flex-direction: column;
        align-items: stretch;
    }
    
    .settings-grid {
        display: flex;
    }
    
    .col-input, .col-output {
        flex: 1 1 auto;
    }
}