/* 
 * Elegant Notepad - Stylesheet
 * Refined minimalism with editorial sensibility
 */

:root {
    /* Light theme colors */
    --bg-primary: #fafafa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f5f5f5;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --border-color: #e0e0e0;
    --accent-color: #2563eb;
    --accent-hover: #1d4ed8;
    --success-color: #059669;
    --error-color: #dc2626;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    --font-serif: 'Source Serif 4', 'Iowan Old Style', 'Palatino Linotype', 'URW Palladio L', P052, serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    
    /* Font sizes */
    --font-size-small: 15px;
    --font-size-medium: 18px;
    --font-size-large: 21px;
    --font-size-xlarge: 24px;
    
    /* Spacing */
    --toolbar-height: 56px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #262626;
    --text-primary: #e5e5e5;
    --text-secondary: #a3a3a3;
    --text-tertiary: #737373;
    --border-color: #2a2a2a;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
}

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

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color var(--transition-base), color var(--transition-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* App Container */
.app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Toolbar */
.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--toolbar-height);
    padding: 0 var(--spacing-lg);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

.toolbar-left,
.toolbar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.note-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-right: var(--spacing-md);
}

.note-name {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-secondary);
    letter-spacing: -0.01em;
    border: none;
    background: transparent;
    outline: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    transition: all var(--transition-fast);
    min-width: 100px;
    max-width: 200px;
}

.note-name:hover {
    background: var(--bg-tertiary);
}

.note-name:focus {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.toolbar-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.toolbar-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

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

.icon {
    width: 20px;
    height: 20px;
    stroke-width: 2;
    transition: all var(--transition-fast);
}

/* Theme toggle icons */
.toolbar-btn .icon-moon {
    display: none;
}

[data-theme="dark"] .toolbar-btn .icon-sun {
    display: none;
}

[data-theme="dark"] .toolbar-btn .icon-moon {
    display: block;
}

/* Lock button states */
.toolbar-btn .icon-lock {
    display: none;
}

.toolbar-btn.locked .icon-unlock {
    display: none;
}

.toolbar-btn.locked .icon-lock {
    display: block;
}

.toolbar-btn.locked {
    color: var(--accent-color);
}

/* Status Indicator */
.status {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0 var(--spacing-sm);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.status.show {
    opacity: 1;
}

.status-text {
    font-size: 13px;
    color: var(--text-tertiary);
}

.status.saving .status-text {
    color: var(--accent-color);
}

.status.saved .status-text {
    color: var(--success-color);
}

.status.error .status-text {
    color: var(--error-color);
}

/* Editor Container */
.editor-container {
    flex: 1;
    overflow: hidden;
    display: flex;
    justify-content: center;
    background: var(--bg-primary);
}

.editor {
    width: 100%;
    max-width: 800px;
    height: 100%;
    padding: var(--spacing-xl);
    border: none;
    outline: none;
    background: transparent;
    color: var(--text-primary);
    font-family: var(--font-serif);
    font-size: var(--font-size-medium);
    line-height: 1.7;
    resize: none;
    transition: font-size var(--transition-base), color var(--transition-base);
}

.editor:focus {
    outline: none;
    border: none;
}

.editor::placeholder {
    color: var(--text-tertiary);
    opacity: 0.6;
}

/* Font size variations */
.editor[data-font-size="small"] {
    font-size: var(--font-size-small);
    line-height: 1.6;
}

.editor[data-font-size="medium"] {
    font-size: var(--font-size-medium);
    line-height: 1.7;
}

.editor[data-font-size="large"] {
    font-size: var(--font-size-large);
    line-height: 1.75;
}

.editor[data-font-size="xlarge"] {
    font-size: var(--font-size-xlarge);
    line-height: 1.8;
}

/* Readonly state */
.editor:read-only {
    cursor: not-allowed;
    opacity: 0.7;
}

/* Dropdown */
.dropdown {
    position: fixed;
    top: calc(var(--toolbar-height) + var(--spacing-sm));
    right: var(--spacing-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: var(--spacing-xs);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    z-index: 1000;
}

.dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    width: 140px;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--text-primary);
    text-align: left;
    font-family: var(--font-sans);
    font-size: 14px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.dropdown-item:hover {
    background: var(--bg-tertiary);
}

.dropdown-item.active {
    background: var(--accent-color);
    color: white;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 2000;
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    width: 100%;
    max-height: 80vh;
    overflow: auto;
    transform: scale(0.95);
    transition: transform var(--transition-base);
}

.modal.show .modal-content {
    transform: scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-body p {
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
    color: var(--text-secondary);
}

.modal-body h3 {
    font-size: 16px;
    font-weight: 600;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.modal-body ul {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.modal-body li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
}

.modal-body kbd {
    display: inline-block;
    padding: 2px 6px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-primary);
}

.note-url {
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 14px;
    word-break: break-all;
    color: var(--accent-color);
}

.raw-url {
    font-size: 14px;
    color: var(--text-tertiary);
}

.raw-url a {
    color: var(--accent-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-fast);
}

.raw-url a:hover {
    border-bottom-color: var(--accent-color);
}

.modal-input {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 15px;
    margin-bottom: var(--spacing-md);
    transition: all var(--transition-fast);
}

.modal-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.modal-btn {
    width: 100%;
    padding: var(--spacing-md);
    border: none;
    border-radius: 6px;
    background: var(--accent-color);
    color: white;
    font-family: var(--font-sans);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-btn:hover {
    background: var(--accent-hover);
}

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

.error-message {
    margin-top: var(--spacing-sm);
    color: var(--error-color);
    font-size: 14px;
    min-height: 20px;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.saving-pulse {
    animation: pulse 1.5s ease-in-out infinite;
}

/* Desktop: Hide mobile button by default */
@media (min-width: 769px) {
    .toolbar-btn-mobile {
        display: none;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .toolbar {
        padding: 0 var(--spacing-md);
    }
    
    .note-info {
        margin-right: var(--spacing-sm);
    }
    
    .note-name {
        font-size: 12px;
        max-width: 120px;
    }
    
    /* Hide desktop-only buttons on mobile */
    .toolbar-btn-desktop {
        display: none;
    }
    
    /* Hide info button on mobile */
    #infoBtn {
        display: none;
    }
    
    /* Show mobile-only button */
    .toolbar-btn-mobile {
        display: flex !important;
    }
    
    .editor {
        padding: var(--spacing-lg);
        max-width: 100%;
    }
    
    .dropdown {
        right: var(--spacing-md);
    }
    
    .modal {
        padding: var(--spacing-md);
    }
}