/*
 * Ink & Paper - Base Styles
 * Editorial-inspired design system
 */

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
    letter-spacing: -0.01em;
}

/* Selection styling */
::selection {
    background-color: var(--color-accent-muted);
    color: var(--color-text-primary);
}

/* Utilities */
.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
}

h1 { font-size: var(--text-4xl); font-weight: 700; }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

p {
    font-size: var(--text-base);
    line-height: 1.7;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-accent-hover);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.125rem;
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition:
        background-color var(--transition-fast),
        color var(--transition-fast),
        transform var(--transition-fast),
        box-shadow var(--transition-fast);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn:focus {
    outline: none;
    box-shadow: var(--shadow-glow);
}

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

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-primary {
    background-color: var(--color-accent);
    color: var(--color-text-inverse);
}

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

.btn-secondary {
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

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

.btn-ghost {
    background-color: transparent;
    color: var(--color-text-secondary);
}

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

.btn-danger {
    color: var(--color-danger);
}

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

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: var(--text-xs);
}

.btn-block {
    width: 100%;
}

/* Button icon styling */
.btn i {
    font-size: 0.9em;
    opacity: 0.85;
}

/* Form Elements */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label:not(.checkbox-label) {
    display: block;
    margin-bottom: 0.5rem;
    font-family: var(--font-display);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    letter-spacing: 0.02em;
}

.form-group input:not([type="checkbox"]),
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: var(--font-body);
    font-size: var(--text-base);
    background-color: var(--color-bg-elevated);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition:
        border-color var(--transition-fast),
        box-shadow var(--transition-fast),
        background-color var(--transition-fast);
}

.form-group input:not([type="checkbox"]):hover,
.form-group textarea:hover,
.form-group select:hover {
    border-color: var(--color-border-light);
}

.form-group input:not([type="checkbox"]):focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow);
    background-color: var(--color-bg-primary);
}

.form-group input:not([type="checkbox"])::placeholder {
    color: var(--color-text-tertiary);
}

.form-hint {
    display: block;
    margin-top: 0.375rem;
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
    font-style: italic;
}

.form-checkbox {
    display: flex;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.checkbox-label {
    display: inline-flex;
    align-items: center;
    gap: 0.625rem;
    cursor: pointer;
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 1.125rem;
    height: 1.125rem;
    margin: 0;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    background-color: var(--color-bg-elevated);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.checkbox-label input[type="checkbox"]:checked {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
}

.checkbox-label input[type="checkbox"]:checked::after {
    content: '✓';
    color: white;
    font-size: 0.75rem;
    font-weight: bold;
}

.checkbox-label span {
    padding-top: 1px;
}

/* App Layout */
.app-container {
    min-height: 100vh;
}

.view {
    min-height: 100vh;
}

/* Auth View */
.auth-view {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    min-height: 100vh;
    background:
        radial-gradient(ellipse at 30% 20%, var(--color-accent-light) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, var(--color-accent-light) 0%, transparent 40%),
        var(--color-bg-secondary);
}

.auth-card {
    width: 100%;
    max-width: 420px;
    padding: 3rem;
    background-color: var(--color-bg-elevated);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-border-subtle);
    position: relative;
}

/* Decorative corner accent */
.auth-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, transparent 50%, var(--color-accent-light) 50%);
    border-radius: 0 var(--radius-xl) 0 0;
    opacity: 0.5;
}

.auth-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 700;
    letter-spacing: -0.03em;
}

.auth-title i {
    color: var(--color-accent);
    font-size: 0.85em;
}

.auth-subtitle {
    text-align: center;
    color: var(--color-text-secondary);
    margin-bottom: 2.5rem;
    font-size: var(--text-base);
    font-style: italic;
}

.auth-form {
    margin-bottom: 1.5rem;
}

.auth-toggle {
    text-align: center;
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.auth-toggle a {
    font-weight: 500;
}

.auth-error {
    margin-top: 1.25rem;
    padding: 0.875rem 1rem;
    background-color: rgba(168, 50, 50, 0.08);
    color: var(--color-danger);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    text-align: center;
    border: 1px solid rgba(168, 50, 50, 0.15);
}

/* Main View Layout */
.main-view {
    display: flex;
    min-height: 100vh;
}

/* Content Area */
.content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    margin-left: var(--sidebar-width);
    background-color: var(--color-bg-primary);
}

/* Empty State */
.empty-state {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    text-align: center;
    color: var(--color-text-secondary);
}

.empty-state > i {
    font-size: 3rem;
    margin-bottom: 1.25rem;
    color: var(--color-text-tertiary);
    opacity: 0.5;
}

.empty-state h2 {
    margin-bottom: 0.5rem;
    font-family: var(--font-display);
    font-size: var(--text-xl);
    color: var(--color-text-primary);
    font-weight: 500;
}

.empty-state p {
    margin-bottom: 1.5rem;
    font-size: var(--text-sm);
    max-width: 260px;
    line-height: 1.5;
}

.empty-state .btn {
    display: inline-flex;
    flex-direction: row;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: var(--text-sm);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 1000;
    display: flex;
    flex-direction: column-reverse;
    gap: 0.75rem;
}

.toast {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    padding: 1rem 1.25rem;
    background-color: var(--color-bg-elevated);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
    font-size: var(--text-sm);
    opacity: 0;
    transform: translateX(100%);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.toast.visible {
    opacity: 1;
    transform: translateX(0);
}

.toast::before {
    content: '';
    width: 4px;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.toast.success::before { background-color: var(--color-success); }
.toast.error::before { background-color: var(--color-danger); }
.toast.warning::before { background-color: var(--color-warning); }
.toast.info::before { background-color: var(--color-info); }

.toast.fade-out {
    opacity: 0;
    transform: translateX(100%);
}

/* Responsive Styles */
@media (max-width: 768px) {
    :root {
        --sidebar-width: 100%;
    }

    .main-view {
        flex-direction: column;
    }

    .content {
        margin-left: 0;
    }

    .sidebar {
        position: fixed;
        left: -100%;
        transition: left var(--transition-slow);
        z-index: 100;
    }

    .sidebar.open {
        left: 0;
    }

    .toast-container {
        left: 1rem;
        right: 1rem;
        bottom: 1rem;
    }

    .auth-card {
        padding: 2rem;
    }
}


/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

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

/* Context Menu */
.context-menu {
    position: fixed;
    min-width: 180px;
    padding: 0.5rem;
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    animation: contextMenuIn 0.15s ease;
}

@keyframes contextMenuIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.context-menu-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-family: var(--font-body);
    font-size: var(--text-sm);
    color: var(--color-text-primary);
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-align: left;
    transition: background-color var(--transition-fast);
}

.context-menu-item:hover {
    background-color: var(--color-bg-hover);
}

.context-menu-item.danger {
    color: var(--color-danger);
}

.context-menu-item.danger:hover {
    background-color: rgba(168, 50, 50, 0.08);
}

.context-menu-item i {
    width: 1rem;
    text-align: center;
    opacity: 0.7;
}

.context-menu-divider {
    height: 1px;
    margin: 0.375rem 0;
    background-color: var(--color-border-light);
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background-color: var(--color-border);
    border-radius: var(--radius-full);
    border: 3px solid transparent;
    background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
    background-color: var(--color-text-tertiary);
}

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

/* Tag Badge Styles */
.tag-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.125rem 0.5rem;
    font-size: var(--text-xs);
    font-weight: 500;
    color: #fff;
    background-color: var(--color-accent);
    border-radius: var(--radius-full);
    white-space: nowrap;
    line-height: 1.4;
}

.tag-badge .tag-remove {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1rem;
    height: 1rem;
    padding: 0;
    margin-left: 0.125rem;
    margin-right: -0.25rem;
    background: transparent;
    border: none;
    color: inherit;
    cursor: pointer;
    opacity: 0.7;
    border-radius: 50%;
    transition: opacity var(--transition-fast), background-color var(--transition-fast);
}

.tag-badge .tag-remove:hover {
    opacity: 1;
    background-color: rgba(0, 0, 0, 0.2);
}

.tag-badge .tag-remove i {
    font-size: 0.6rem;
}

/* Note Tags Container (in editor header) */
.note-tags-container {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0;
    min-height: 2rem;
}

.note-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
}

.tag-input {
    flex: 1;
    min-width: 80px;
    max-width: 150px;
    padding: 0.25rem 0.5rem;
    font-family: var(--font-body);
    font-size: var(--text-sm);
    color: var(--color-text-primary);
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.tag-input:focus {
    border-color: var(--color-border);
    background-color: var(--color-bg-elevated);
}

.tag-input::placeholder {
    color: var(--color-text-tertiary);
}

/* Tag Suggestions Dropdown */
.tag-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    max-width: 250px;
    max-height: 200px;
    overflow-y: auto;
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 100;
}

.tag-suggestion-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.tag-suggestion-item:hover {
    background-color: var(--color-bg-hover);
}

.tag-suggestion-create {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

.tag-suggestion-create i {
    font-size: 0.75rem;
    opacity: 0.7;
}

/* Tag Filter Panel (in sidebar) */
.tag-filter-panel {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border-subtle);
}

.tag-filter-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.tag-filter-clear {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 1.25rem;
    height: 1.25rem;
    padding: 0;
    background: transparent;
    border: none;
    color: var(--color-text-tertiary);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.tag-filter-clear:hover {
    color: var(--color-text-primary);
    background-color: var(--color-bg-hover);
}

.tag-filter-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
}

.tag-filter-empty {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
    font-style: italic;
}

.tag-filter-item {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.125rem 0.25rem;
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.tag-filter-item:hover {
    background-color: var(--color-bg-hover);
}

.tag-filter-item.selected {
    border-color: var(--color-accent);
    background-color: var(--color-accent-light);
}

.tag-filter-item .tag-badge {
    font-size: 0.65rem;
    padding: 0.0625rem 0.375rem;
}

.tag-count {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
}

.folder-tree-empty {
    padding: 1rem;
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    text-align: center;
    font-style: italic;
}