/* ========================================
   SMART DOCUMENT EDITOR - MAIN STYLESHEET
   ======================================== */

/* CSS Variables for Theme Management */
:root {
    /* Light Mode Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --text-primary: #333333;
    --text-secondary: #666666;
    --border-color: #dddddd;
    --toolbar-bg: #f8f9fa;
    --button-hover: #e9ecef;
    --accent-color: #4a90e2;
    
    /* Layout */
    --header-height: 60px;
    --toolbar-height: 50px;
    --footer-height: 40px;
    --spacing: 16px;
    
    /* Transitions */
    --transition-speed: 0.3s;
}

/* Dark Mode Variables */
body.dark-mode {
    --bg-primary: #1e1e1e;
    --bg-secondary: #252526;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --border-color: #3e3e42;
    --toolbar-bg: #2d2d30;
    --button-hover: #3e3e42;
    --accent-color: #569cd6;
}

/* ========================================
   RESET & BASE STYLES
   ======================================== */

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    transition: background-color var(--transition-speed), color var(--transition-speed);
    overflow-x: hidden;
}

/* ========================================
   ACCESSIBILITY - SKIP LINK
   ======================================== */

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--accent-color);
    color: white;
    padding: 8px 16px;
    text-decoration: none;
    z-index: 100;
    border-radius: 0 0 4px 0;
}

.skip-link:focus {
    top: 0;
}

/* ========================================
   MAIN CONTAINER
   ======================================== */

.container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 100%;
}

/* ========================================
   HEADER SECTION
   ======================================== */

.header {
    height: var(--header-height);
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 var(--spacing);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.app-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.header-right {
    display: flex;
    gap: 10px;
}

/* ========================================
   TOOLBAR SECTION
   ======================================== */

.toolbar {
    background-color: var(--toolbar-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 8px var(--spacing);
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
}

.toolbar-group {
    display: flex;
    gap: 6px;
    align-items: center;
    padding-right: 12px;
    border-right: 1px solid var(--border-color);
}

.toolbar-group:last-child {
    border-right: none;
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 8px 14px;
    min-height: 36px;  /* Touch-friendly minimum */
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.2s, transform 0.1s;
    white-space: nowrap;  /* Prevent text wrapping in buttons */
}

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

.btn:active {
    transform: scale(0.95);
}

.btn:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

.btn-icon {
    width: 40px;  /* Larger for touch */
    height: 40px;
    padding: 0;
    font-size: 18px;
}

/* ========================================
   EDITOR SECTION
   ======================================== */

.editor-wrapper {
    flex: 1;
    overflow-y: auto;
    background-color: var(--bg-secondary);
    padding: var(--spacing);
    display: flex;
    justify-content: center;
}

.editor-content {
    width: 100%;
    max-width: 900px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    min-height: calc(100vh - var(--header-height) - var(--toolbar-height) - var(--footer-height) - 32px);
}

/* Quill Editor Customization */
.ql-container {
    font-size: 16px;
    font-family: 'Georgia', serif;
    min-height: 500px;
}

.ql-editor {
    padding: 40px;
    line-height: 1.6;
}

.ql-editor:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: -2px;
}

.ql-editor.ql-blank::before {
    color: var(--text-secondary);
    font-style: italic;
}

/* Dark mode adjustments for Quill */
body.dark-mode .ql-toolbar {
    background-color: var(--toolbar-bg);
    border-color: var(--border-color);
}

body.dark-mode .ql-stroke {
    stroke: var(--text-primary);
}

body.dark-mode .ql-fill {
    fill: var(--text-primary);
}

body.dark-mode .ql-picker-label {
    color: var(--text-primary);
}

body.dark-mode .ql-editor {
    color: var(--text-primary);
}

/* ========================================
   FOOTER SECTION
   ======================================== */

.footer {
    height: var(--footer-height);
    background-color: var(--toolbar-bg);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 var(--spacing);
    font-size: 13px;
    color: var(--text-secondary);
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

/* Tablet and below */
@media (max-width: 768px) {
    .app-title {
        font-size: 16px;
    }
    
    .toolbar {
        padding: 8px;
        gap: 8px;
    }
    
    .toolbar-group {
        gap: 4px;
        padding-right: 8px;
    }
    
    /* Make buttons more touch-friendly */
    .btn {
        min-height: 44px;  /* Apple/Android touch target guideline */
        padding: 10px 16px;
        font-size: 15px;
    }
    
    .btn-icon {
        width: 44px;
        height: 44px;
        font-size: 20px;
    }
    
    .editor-content {
        max-width: 100%;
        border-radius: 0;
    }
    
    .ql-editor {
        padding: 20px;
        font-size: 16px;  /* Prevent zoom on iOS */
    }
    
    /* Stack footer items on very small screens */
    .footer {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
        height: auto;
        padding: 12px var(--spacing);
    }
}

/* Mobile phones */
@media (max-width: 480px) {
    .header {
        padding: 0 12px;
    }
    
    .app-title {
        font-size: 14px;
    }
    
    /* Hide button text on very small screens, keep icons */
    .toolbar-group .btn:not(.btn-icon):not(#newDoc):not(#saveDoc) {
        padding: 10px 12px;
        font-size: 14px;
    }
    
    .editor-wrapper {
        padding: 8px;
    }
    
    .ql-editor {
        padding: 16px;
    }
}

/* ========================================
   UTILITY CLASSES
   ======================================== */

.hidden {
    display: none !important;
}

.disabled {
    opacity: 0.5;
    pointer-events: none;
}

/* Improve focus visibility for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Remove outline for mouse users */
*:focus:not(:focus-visible) {
    outline: none;
}