/* ==========================================================================
   Document Sleeve Designer - Stylesheet
   Priory Hospital
   ========================================================================== */

:root {
    /* Colours - Professional, clinical palette */
    --colour-primary: #1a365d;
    --colour-primary-light: #2c5282;
    --colour-secondary: #4a5568;
    --colour-accent: #1a365d;
    --colour-danger: #c53030;
    --colour-success: #276749;
    
    --colour-bg: #f7f8fa;
    --colour-surface: #ffffff;
    --colour-border: #e2e8f0;
    --colour-border-dark: #cbd5e0;
    --colour-text: #1a202c;
    --colour-text-muted: #718096;
    
    /* Typography */
    --font-sans: 'Source Sans 3', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Source Serif 4', Georgia, serif;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    
    /* Borders */
    --radius-sm: 4px;
    --radius-md: 6px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-sans);
    font-weight: 400;
    line-height: 1.5;
    color: var(--colour-text);
    background: var(--colour-bg);
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
    margin: 0;
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: 1.2;
}

p {
    margin: 0;
}

ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

button {
    cursor: pointer;
    font-family: inherit;
}

input, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* ==========================================================================
   Layout
   ========================================================================== */

.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-header {
    background: var(--colour-primary);
    color: white;
    padding: var(--space-md) var(--space-xl);
    border-bottom: 3px solid var(--colour-primary-light);
}

.app-header h1 {
    font-size: 1.5rem;
    font-family: var(--font-sans);
    font-weight: 600;
    letter-spacing: -0.01em;
}

.app-header .subtitle {
    font-size: 0.875rem;
    opacity: 0.8;
    margin-top: var(--space-xs);
}

.main-content {
    flex: 1;
    display: grid;
    grid-template-columns: 280px 1fr 400px;
    gap: 0;
    height: calc(100vh - 80px);
}

/* ==========================================================================
   Template Panel (Left)
   ========================================================================== */

.template-panel {
    background: var(--colour-surface);
    border-right: 1px solid var(--colour-border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.panel-header {
    padding: var(--space-md);
    border-bottom: 1px solid var(--colour-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-header h2 {
    font-size: 0.875rem;
    font-family: var(--font-sans);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--colour-secondary);
}

.template-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-sm);
}

.template-item {
    padding: var(--space-md);
    border: 1px solid var(--colour-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-sm);
    cursor: pointer;
    transition: all 0.15s ease;
    background: var(--colour-surface);
}

.template-item:hover {
    border-color: var(--colour-border-dark);
    box-shadow: var(--shadow-sm);
}

.template-item.active {
    border-color: var(--colour-primary);
    box-shadow: 0 0 0 2px rgba(26, 54, 93, 0.1);
}

.template-item-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.template-item-colour {
    width: 12px;
    height: 12px;
    border-radius: 2px;
    flex-shrink: 0;
}

.template-item-title {
    font-weight: 600;
    font-size: 0.9375rem;
    color: var(--colour-text);
}

.template-item-description {
    font-size: 0.8125rem;
    color: var(--colour-text-muted);
    margin-top: var(--space-xs);
    line-height: 1.4;
}

.template-list-empty {
    padding: var(--space-xl);
    text-align: center;
    color: var(--colour-text-muted);
    font-size: 0.875rem;
}

/* ==========================================================================
   Editor Panel (Centre)
   ========================================================================== */

.editor-panel {
    background: var(--colour-bg);
    padding: var(--space-xl);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.editor-placeholder {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--colour-text-muted);
    font-size: 0.9375rem;
}

.editor-form {
    max-width: 560px;
}

.editor-form h3 {
    font-size: 1.125rem;
    margin-bottom: var(--space-lg);
    color: var(--colour-primary);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 120px;
    gap: var(--space-md);
}

.form-group {
    margin-bottom: var(--space-md);
}

.form-group label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--colour-secondary);
    margin-bottom: var(--space-xs);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.form-group input[type="text"],
.form-group textarea {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--colour-border);
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
    background: var(--colour-surface);
}

.form-group input[type="text"]:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--colour-primary);
    box-shadow: 0 0 0 3px rgba(26, 54, 93, 0.1);
}

.form-group input[type="color"] {
    width: 36px;
    height: 36px;
    padding: 2px;
    border: 1px solid var(--colour-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    background: var(--colour-surface);
}

.colour-picker {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    align-items: center;
}

.colour-swatch {
    width: 36px;
    height: 36px;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.15s ease;
    padding: 0;
}

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

.colour-swatch.selected {
    border-color: var(--colour-text);
    box-shadow: 0 0 0 2px var(--colour-surface), 0 0 0 4px var(--colour-text);
}

.form-group textarea {
    resize: vertical;
    min-height: 60px;
}

.form-actions {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--colour-border);
}

.form-actions .btn-danger {
    margin-left: auto;
}

/* ==========================================================================
   Preview Panel (Right)
   ========================================================================== */

.preview-panel {
    background: var(--colour-surface);
    border-left: 1px solid var(--colour-border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.preview-placeholder {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--colour-text-muted);
    font-size: 0.875rem;
}

.preview-container {
    flex: 1;
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.print-controls {
    display: flex;
    gap: var(--space-md);
    align-items: flex-end;
    margin-bottom: var(--space-md);
}

.print-controls .patient-input {
    flex: 1;
    margin-bottom: 0;
}

.patient-input {
    margin-bottom: var(--space-md);
}

.patient-input label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--colour-secondary);
    margin-bottom: var(--space-xs);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.patient-input input {
    width: 100%;
    padding: var(--space-sm);
    border: 1px solid var(--colour-border);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

.preview-wrapper {
    flex: 1;
    background: #e2e8f0;
    border-radius: var(--radius-md);
    padding: var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.sleeve-preview {
    /* A4 landscape aspect ratio: 297mm x 210mm */
    width: 100%;
    aspect-ratio: 297 / 210;
    max-height: 100%;
    background: white;
    box-shadow: var(--shadow-md);
    display: flex;
    font-size: 6px; /* Scale down for preview */
    overflow: hidden;
}

.preview-note {
    font-size: 0.75rem;
    color: var(--colour-text-muted);
    text-align: center;
    margin-top: var(--space-sm);
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    transition: all 0.15s ease;
}

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

.btn-primary {
    background: var(--colour-primary);
    color: white;
    border-color: var(--colour-primary);
}

.btn-primary:hover:not(:disabled) {
    background: var(--colour-primary-light);
    border-color: var(--colour-primary-light);
}

.btn-secondary {
    background: var(--colour-surface);
    color: var(--colour-secondary);
    border-color: var(--colour-border);
}

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

.btn-danger {
    background: var(--colour-surface);
    color: var(--colour-danger);
    border-color: var(--colour-danger);
}

.btn-danger:hover:not(:disabled) {
    background: var(--colour-danger);
    color: white;
}

.btn-print {
    background: var(--colour-primary);
    color: white;
    border-color: var(--colour-primary);
    padding: var(--space-md) var(--space-lg);
    font-size: 0.9375rem;
}

.btn-print:hover:not(:disabled) {
    background: var(--colour-primary-light);
    border-color: var(--colour-primary-light);
}

.btn-print:disabled {
    background: var(--colour-border);
    border-color: var(--colour-border);
    color: var(--colour-text-muted);
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

.hidden {
    display: none !important;
}

/* ==========================================================================
   Sleeve Preview Styles (Screen)
   ========================================================================== */

.sleeve-preview .preview-back,
.sleeve-preview .preview-spine,
.sleeve-preview .preview-front {
    height: 100%;
    box-sizing: border-box;
}

.sleeve-preview .preview-back {
    flex: 0 0 calc(50% - 1.5mm);
    border-right: 1px dashed #ccc;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2em;
}

.sleeve-preview .preview-spine {
    flex: 0 0 3mm;
    background: var(--sleeve-colour, var(--colour-primary));
}

.sleeve-preview .preview-front {
    flex: 0 0 calc(50% - 1.5mm);
    border-left: 1px dashed #ccc;
    padding: 2em;
    display: flex;
    flex-direction: column;
}

.sleeve-preview .preview-logo {
    width: 8em;
    height: auto;
    margin-bottom: 1em;
}

.sleeve-preview .preview-title {
    font-family: var(--font-serif);
    font-size: 2.5em;
    font-weight: 600;
    color: var(--sleeve-colour, var(--colour-primary));
    margin-bottom: 0.5em;
    border-bottom: 2px solid var(--sleeve-colour, var(--colour-primary));
    padding-bottom: 0.5em;
}

.sleeve-preview .preview-description {
    font-size: 1.3em;
    font-weight: 600;
    color: var(--colour-secondary);
    margin-top: 1.5em;
    margin-bottom: 1.5em;
    padding-top: 1em;
    padding-bottom: 1em;
    border-top: 1px solid var(--colour-border);
    border-bottom: 1px solid var(--colour-border);
}

.sleeve-preview .preview-content {
    font-size: 1.1em;
    color: var(--colour-text);
    line-height: 1.4;
}

.sleeve-preview .preview-patient {
    margin-top: auto;
    padding-top: 2em;
}

.sleeve-preview .preview-patient-label {
    font-size: 1em;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--colour-secondary);
    margin-bottom: 0.5em;
}

.sleeve-preview .preview-patient-line {
    height: 2em;
    border-bottom: 1px solid var(--colour-border-dark);
}

.sleeve-preview .preview-patient-name {
    font-size: 1.5em;
    color: var(--colour-text);
    padding: 0.5em 0;
    border-bottom: 1px solid var(--colour-border-dark);
    min-height: 2em;
}

.sleeve-preview .preview-footer {
    margin-top: 2em;
    padding-top: 1em;
    border-top: 1px solid var(--colour-border);
    font-size: 1em;
    color: var(--colour-text-muted);
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

.print-area {
    display: none;
}

@media print {
    /* Hide everything except print area */
    body * {
        visibility: hidden;
    }
    
    .print-area,
    .print-area * {
        visibility: visible;
    }
    
    .print-area {
        display: block;
        position: absolute;
        left: 0;
        top: 0;
        width: 297mm;
        height: 210mm;
    }
    
    @page {
        size: A4 landscape;
        margin: 0;
    }
    
    .sleeve-print {
        width: 297mm;
        height: 210mm;
        display: flex;
        font-family: 'Source Sans 3', Arial, sans-serif;
        background: white;
    }
    
    .sleeve-back {
        width: calc(50% - 1.5mm);
        height: 100%;
        border-right: 0.5pt dashed #999;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        padding: 15mm;
        box-sizing: border-box;
    }
    
    .sleeve-back .logo-area {
        margin-bottom: 10mm;
    }
    
    .sleeve-back .logo {
        width: 40mm;
        height: auto;
    }
    
    .sleeve-back .back-title {
        font-family: 'Source Serif 4', Georgia, serif;
        font-size: 14pt;
        color: #1a365d;
        text-align: center;
    }
    
    .sleeve-spine {
        width: 3mm;
        height: 100%;
        background: var(--print-colour, #1a365d);
    }
    
    .sleeve-front {
        width: calc(50% - 1.5mm);
        height: 100%;
        border-left: 0.5pt dashed #999;
        padding: 12mm 15mm;
        box-sizing: border-box;
        display: flex;
        flex-direction: column;
    }
    
    .sleeve-front .front-header {
        margin-bottom: 6mm;
    }
    
    .sleeve-front .logo {
        width: 30mm;
        height: auto;
        margin-bottom: 6mm;
        display: block;
    }
    
    .sleeve-front .front-title-block {
        /* No longer flex child */
    }
    
    .sleeve-front .front-title {
        font-family: 'Source Serif 4', Georgia, serif;
        font-size: 28pt;
        font-weight: 600;
        color: var(--print-colour, #1a365d);
        margin: 0 0 4mm 0;
        padding-bottom: 4mm;
        border-bottom: 1.5pt solid var(--print-colour, #1a365d);
        line-height: 1.1;
    }
    
    .sleeve-front .front-description {
        font-size: 12pt;
        font-weight: 600;
        color: #374151;
        margin: 0;
        margin-top: 5mm;
        padding-top: 4mm;
        padding-bottom: 5mm;
        margin-bottom: 5mm;
        border-top: 0.5pt solid #e2e8f0;
        border-bottom: 0.5pt solid #e2e8f0;
        line-height: 1.4;
    }
    
    .sleeve-front .front-body {
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    
    .sleeve-front .front-content {
        font-size: 11pt;
        color: #374151;
        line-height: 1.6;
        margin-bottom: 8mm;
    }
    
    .sleeve-front .patient-field {
        margin-top: auto;
        padding-top: 8mm;
    }
    
    .sleeve-front .patient-field label {
        display: block;
        font-size: 10pt;
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 0.5pt;
        color: #4a5568;
        margin-bottom: 3mm;
    }
    
    .sleeve-front .patient-line {
        height: 12mm;
        border-bottom: 0.5pt solid #718096;
    }
    
    .sleeve-front .patient-line.filled {
        border-bottom: none;
        font-size: 16pt;
        color: #1a202c;
        padding-top: 2mm;
    }
    
    .sleeve-front .front-footer {
        padding-top: 5mm;
        margin-top: 5mm;
        border-top: 0.5pt solid #e2e8f0;
        font-size: 9pt;
        color: #718096;
    }
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media screen and (max-width: 1200px) {
    .main-content {
        grid-template-columns: 240px 1fr 320px;
    }
}

@media screen and (max-width: 900px) {
    .main-content {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr auto;
        height: auto;
    }
    
    .template-panel {
        border-right: none;
        border-bottom: 1px solid var(--colour-border);
        max-height: 200px;
    }
    
    .preview-panel {
        border-left: none;
        border-top: 1px solid var(--colour-border);
        min-height: 400px;
    }
}