/* ============================================================
   فایل CSS اصلی — کاملاً Local، بدون هیچ CDN
   شامل: Reset، متغیرها، Typography فارسی، Layout، Components
   ============================================================ */

/* ── @font-face فونت وزیرمتن (Local) ──────────────────── */
@font-face {
    font-family: 'Vazirmatn';
    src: url('../fonts/vazirmatn/Vazirmatn-Regular.woff2') format('woff2');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'Vazirmatn';
    src: url('../fonts/vazirmatn/Vazirmatn-Medium.woff2') format('woff2');
    font-weight: 500;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'Vazirmatn';
    src: url('../fonts/vazirmatn/Vazirmatn-Bold.woff2') format('woff2');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

/* ── CSS Variables ─────────────────────────────────────── */
:root {
    --color-primary:       #6366f1;
    --color-primary-dark:  #4f46e5;
    --color-primary-light: #e0e7ff;
    --color-secondary:     #10b981;
    --color-danger:        #ef4444;
    --color-warning:       #f59e0b;
    --color-info:          #3b82f6;

    --color-bg:            #f8fafc;
    --color-surface:       #ffffff;
    --color-border:        #e2e8f0;
    --color-border-dark:   #cbd5e1;

    --color-text:          #1e293b;
    --color-text-muted:    #64748b;
    --color-text-light:    #94a3b8;

    --sidebar-width:       260px;
    --notelist-width:      300px;
    --header-height:       56px;

    --radius-sm:   4px;
    --radius-md:   8px;
    --radius-lg:   12px;
    --radius-xl:   16px;
    --radius-full: 9999px;

    --shadow-sm:   0 1px 2px rgba(0,0,0,.06);
    --shadow-md:   0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
    --shadow-lg:   0 10px 15px rgba(0,0,0,.08), 0 4px 6px rgba(0,0,0,.05);

    --font-family: 'Vazirmatn', Tahoma, Arial, sans-serif;
    --font-size-xs:   11px;
    --font-size-sm:   13px;
    --font-size-base: 15px;
    --font-size-lg:   17px;
    --font-size-xl:   20px;
    --font-size-2xl:  24px;

    --transition: 150ms ease;
}

/* ── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: var(--font-size-base); scroll-behavior: smooth; }
body {
    font-family: var(--font-family);
    background: var(--color-bg);
    color: var(--color-text);
    direction: rtl;
    text-align: right;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: var(--font-family); }
input, textarea, select { font-family: var(--font-family); }

/* ── Typography ─────────────────────────────────────────── */
h1 { font-size: var(--font-size-2xl); font-weight: 700; line-height: 1.3; }
h2 { font-size: var(--font-size-xl);  font-weight: 700; line-height: 1.3; }
h3 { font-size: var(--font-size-lg);  font-weight: 600; line-height: 1.4; }
h4 { font-size: var(--font-size-base);font-weight: 600; }
p  { margin-bottom: .75rem; }
p:last-child { margin-bottom: 0; }
.text-muted  { color: var(--color-text-muted); }
.text-light  { color: var(--color-text-light); }
.text-sm     { font-size: var(--font-size-sm); }
.text-xs     { font-size: var(--font-size-xs); }
.text-lg     { font-size: var(--font-size-lg); }
.font-bold   { font-weight: 700; }
.font-medium { font-weight: 500; }

/* ── Layout ─────────────────────────────────────────────── */
.app-shell {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* ── Sidebar ────────────────────────────────────────────── */
.sidebar {
    width: var(--sidebar-width);
    background: var(--color-surface);
    border-left: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    overflow-y: auto;
    transition: transform var(--transition);
    z-index: 100;
}
.sidebar-logo {
    display: flex;
    align-items: center;
    gap: .75rem;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--color-border);
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-primary);
}
.sidebar-logo svg { width: 28px; height: 28px; }

.sidebar-section { padding: .5rem 0; }
.sidebar-section-title {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: .05em;
    padding: .5rem 1.25rem .25rem;
}
.sidebar-item {
    display: flex;
    align-items: center;
    gap: .625rem;
    padding: .5rem 1.25rem;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    border-radius: 0;
    transition: background var(--transition), color var(--transition);
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
    text-align: right;
}
.sidebar-item:hover { background: var(--color-bg); color: var(--color-text); }
.sidebar-item.active {
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
    font-weight: 500;
}
.sidebar-item svg { width: 16px; height: 16px; flex-shrink: 0; }
.sidebar-item .badge {
    margin-right: auto;
    margin-left: 0;
    font-size: var(--font-size-xs);
    background: var(--color-border);
    color: var(--color-text-muted);
    padding: 1px 6px;
    border-radius: var(--radius-full);
}
.sidebar-item.active .badge {
    background: var(--color-primary);
    color: #fff;
}
.sidebar-divider {
    height: 1px;
    background: var(--color-border);
    margin: .5rem 1.25rem;
}

/* ── Main Area ──────────────────────────────────────────── */
.main-area {
    flex: 1;
    display: flex;
    overflow: hidden;
    min-width: 0;
}

/* ── Note List Panel ────────────────────────────────────── */
.note-list-panel {
    width: var(--notelist-width);
    border-left: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    background: #f1f5f9;
    flex-shrink: 0;
    overflow: hidden;
}
.note-list-header {
    padding: .875rem 1rem;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-surface);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .5rem;
}
.note-list-header h2 { font-size: var(--font-size-base); margin: 0; }
.note-list-scroll { flex: 1; overflow-y: auto; padding: .5rem; }

/* ── Note Card ──────────────────────────────────────────── */
.note-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: .875rem 1rem;
    margin-bottom: .5rem;
    cursor: pointer;
    transition: border-color var(--transition), box-shadow var(--transition);
    position: relative;
}
.note-card:hover { border-color: var(--color-primary); box-shadow: var(--shadow-sm); }
.note-card.active {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
    box-shadow: var(--shadow-sm);
}
.note-card-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: .25rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.note-card-preview {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: .5rem;
}
.note-card-meta {
    display: flex;
    align-items: center;
    gap: .375rem;
    flex-wrap: wrap;
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
}
.note-card-pin {
    position: absolute;
    top: .5rem;
    left: .75rem;
    color: var(--color-warning);
    font-size: 14px;
}

/* ── Editor Panel ───────────────────────────────────────── */
.editor-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--color-surface);
}
.editor-toolbar {
    padding: .625rem 1.25rem;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .5rem;
    flex-shrink: 0;
    min-height: var(--header-height);
}
.editor-title-input {
    font-size: var(--font-size-xl);
    font-weight: 700;
    border: none;
    outline: none;
    width: 100%;
    padding: 1rem 1.5rem .5rem;
    font-family: var(--font-family);
    color: var(--color-text);
    background: transparent;
    direction: rtl;
}
.editor-title-input::placeholder { color: var(--color-text-light); }
.editor-meta-bar {
    padding: .375rem 1.5rem;
    display: flex;
    align-items: center;
    gap: .75rem;
    flex-wrap: wrap;
    border-bottom: 1px solid var(--color-border);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}
.editor-content {
    flex: 1;
    overflow: hidden;
    position: relative;
}
.editor-content .tox-tinymce {
    border: none !important;
    border-radius: 0 !important;
}

/* ── Buttons ────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .375rem;
    padding: .5rem 1rem;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    font-family: var(--font-family);
    border: 1px solid transparent;
    transition: background var(--transition), border-color var(--transition),
                box-shadow var(--transition), opacity var(--transition);
    cursor: pointer;
    white-space: nowrap;
    line-height: 1.4;
}
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn svg { width: 15px; height: 15px; }

.btn-primary   { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.btn-primary:hover { background: var(--color-primary-dark); border-color: var(--color-primary-dark); }

.btn-secondary { background: var(--color-surface); color: var(--color-text); border-color: var(--color-border-dark); }
.btn-secondary:hover { background: var(--color-bg); }

.btn-danger    { background: var(--color-danger); color: #fff; border-color: var(--color-danger); }
.btn-danger:hover { background: #dc2626; }

.btn-ghost     { background: transparent; color: var(--color-text-muted); border-color: transparent; }
.btn-ghost:hover { background: var(--color-bg); color: var(--color-text); }

.btn-sm { padding: .3rem .7rem; font-size: var(--font-size-xs); }
.btn-lg { padding: .7rem 1.5rem; font-size: var(--font-size-base); }
.btn-icon { padding: .4rem; border-radius: var(--radius-md); }
.btn-icon svg { width: 18px; height: 18px; }

/* ── Form Elements ──────────────────────────────────────── */
.form-group { margin-bottom: 1.25rem; }
.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: .375rem;
}
.form-label .required { color: var(--color-danger); margin-right: .2rem; }
.form-control {
    display: block;
    width: 100%;
    padding: .55rem .875rem;
    font-size: var(--font-size-sm);
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border-dark);
    border-radius: var(--radius-md);
    transition: border-color var(--transition), box-shadow var(--transition);
    direction: rtl;
    line-height: 1.6;
}
.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99,102,241,.15);
}
.form-control.is-invalid {
    border-color: var(--color-danger);
    box-shadow: 0 0 0 3px rgba(239,68,68,.12);
}
.form-control::placeholder { color: var(--color-text-light); }
.form-error {
    font-size: var(--font-size-xs);
    color: var(--color-danger);
    margin-top: .3rem;
}
.form-hint {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: .3rem;
}
textarea.form-control { resize: vertical; min-height: 100px; }
select.form-control { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3E%3Cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: left .75rem center; background-size: 1.1em; padding-left: 2.5rem; appearance: none; }

/* ── Tags ───────────────────────────────────────────────── */
.tag-badge {
    display: inline-flex;
    align-items: center;
    gap: .25rem;
    padding: .15rem .55rem;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 500;
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
    line-height: 1.6;
}
.tag-badge .remove-tag {
    cursor: pointer;
    opacity: .6;
    font-size: 14px;
    line-height: 1;
    margin-right: .125rem;
}
.tag-badge .remove-tag:hover { opacity: 1; }
.tags-input-wrapper {
    border: 1px solid var(--color-border-dark);
    border-radius: var(--radius-md);
    padding: .375rem .625rem;
    display: flex;
    flex-wrap: wrap;
    gap: .375rem;
    align-items: center;
    min-height: 40px;
    cursor: text;
    transition: border-color var(--transition), box-shadow var(--transition);
}
.tags-input-wrapper:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99,102,241,.15);
}
.tags-input-wrapper input {
    border: none;
    outline: none;
    font-size: var(--font-size-sm);
    font-family: var(--font-family);
    flex: 1;
    min-width: 80px;
    direction: rtl;
    background: transparent;
}

/* ── Alert / Flash ──────────────────────────────────────── */
.alert {
    display: flex;
    align-items: flex-start;
    gap: .625rem;
    padding: .75rem 1rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    font-size: var(--font-size-sm);
    margin-bottom: .75rem;
}
.alert-success { background: #f0fdf4; border-color: #bbf7d0; color: #15803d; }
.alert-error   { background: #fef2f2; border-color: #fecaca; color: #b91c1c; }
.alert-warning { background: #fffbeb; border-color: #fde68a; color: #b45309; }
.alert-info    { background: #eff6ff; border-color: #bfdbfe; color: #1d4ed8; }
.alert-icon    { flex-shrink: 0; font-size: 16px; margin-top: .1rem; }

/* ── Modal ──────────────────────────────────────────────── */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.45);
    z-index: 900;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity .2s, visibility .2s;
}
.modal-backdrop.open { opacity: 1; visibility: visible; }
.modal {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 540px;
    max-height: 90vh;
    overflow-y: auto;
    transform: translateY(20px) scale(.97);
    transition: transform .2s;
}
.modal-backdrop.open .modal { transform: translateY(0) scale(1); }
.modal-header {
    padding: 1.25rem 1.5rem 1rem;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.modal-header h3 { margin: 0; font-size: var(--font-size-lg); }
.modal-close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-muted);
    padding: .25rem;
    border-radius: var(--radius-sm);
    line-height: 1;
    font-size: 20px;
    transition: color var(--transition);
}
.modal-close:hover { color: var(--color-text); }
.modal-body    { padding: 1.25rem 1.5rem; }
.modal-footer  { padding: 1rem 1.5rem; border-top: 1px solid var(--color-border); display: flex; gap: .625rem; justify-content: flex-end; }

/* ── Dropdown ───────────────────────────────────────────── */
.dropdown { position: relative; display: inline-block; }
.dropdown-menu {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    min-width: 180px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    z-index: 500;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: all .15s;
}
.dropdown-menu.open { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown-item {
    display: flex;
    align-items: center;
    gap: .5rem;
    padding: .55rem 1rem;
    font-size: var(--font-size-sm);
    color: var(--color-text);
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
    text-align: right;
    transition: background var(--transition);
}
.dropdown-item:hover { background: var(--color-bg); }
.dropdown-item.danger { color: var(--color-danger); }
.dropdown-divider { height: 1px; background: var(--color-border); margin: .25rem 0; }

/* ── Kanban Board ───────────────────────────────────────── */
.kanban-board {
    display: flex;
    gap: 1rem;
    padding: 1.25rem;
    overflow-x: auto;
    align-items: flex-start;
    min-height: calc(100vh - var(--header-height));
    flex-direction: row-reverse; /* RTL */
}
.kanban-col {
    background: #f1f5f9;
    border-radius: var(--radius-lg);
    width: 272px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    max-height: calc(100vh - var(--header-height) - 2.5rem);
}
.kanban-col-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: .75rem 1rem;
    border-bottom: 1px solid var(--color-border);
}
.kanban-col-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: .5rem;
}
.kanban-col-title .col-count {
    background: var(--color-border);
    color: var(--color-text-muted);
    border-radius: var(--radius-full);
    padding: 1px 7px;
    font-size: var(--font-size-xs);
}
.kanban-col-cards { flex: 1; overflow-y: auto; padding: .5rem; display: flex; flex-direction: column; gap: .5rem; }
.kanban-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: .75rem;
    cursor: grab;
    transition: box-shadow var(--transition), border-color var(--transition);
    user-select: none;
}
.kanban-card:hover { box-shadow: var(--shadow-md); border-color: var(--color-primary); }
.kanban-card.dragging { opacity: .5; cursor: grabbing; }
.kanban-card-title { font-size: var(--font-size-sm); font-weight: 500; margin-bottom: .5rem; }
.kanban-card-meta  { display: flex; align-items: center; gap: .375rem; flex-wrap: wrap; font-size: var(--font-size-xs); color: var(--color-text-muted); }
.kanban-add-col {
    background: rgba(255,255,255,.6);
    border: 2px dashed var(--color-border-dark);
    border-radius: var(--radius-lg);
    width: 240px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 60px;
    cursor: pointer;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    transition: background var(--transition), border-color var(--transition);
    gap: .375rem;
}
.kanban-add-col:hover { background: rgba(255,255,255,.9); border-color: var(--color-primary); color: var(--color-primary); }

/* ── Priority Badges ────────────────────────────────────── */
.priority { display: inline-flex; align-items: center; gap: .25rem; padding: .15rem .5rem; border-radius: var(--radius-full); font-size: var(--font-size-xs); font-weight: 500; }
.priority-low      { background: #f0fdf4; color: #15803d; }
.priority-medium   { background: #fffbeb; color: #b45309; }
.priority-high     { background: #fff7ed; color: #c2410c; }
.priority-critical { background: #fef2f2; color: #b91c1c; }

/* ── Search ─────────────────────────────────────────────── */
.search-box {
    position: relative;
    display: flex;
    align-items: center;
}
.search-box input {
    padding-right: 2.5rem;
    padding-left: .875rem;
}
.search-box .search-icon {
    position: absolute;
    right: .75rem;
    color: var(--color-text-light);
    pointer-events: none;
    width: 16px;
    height: 16px;
}
.search-results-dropdown {
    position: absolute;
    top: calc(100% + 4px);
    right: 0;
    left: 0;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 600;
    max-height: 360px;
    overflow-y: auto;
}
.search-result-item {
    display: flex;
    align-items: flex-start;
    gap: .75rem;
    padding: .625rem 1rem;
    border-bottom: 1px solid var(--color-border);
    cursor: pointer;
    transition: background var(--transition);
    text-decoration: none;
    color: inherit;
}
.search-result-item:last-child { border-bottom: none; }
.search-result-item:hover { background: var(--color-bg); }
.search-result-type {
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
    flex-shrink: 0;
    padding-top: .15rem;
}
.search-result-title { font-size: var(--font-size-sm); font-weight: 500; }
.search-result-preview { font-size: var(--font-size-xs); color: var(--color-text-muted); margin-top: .15rem; }
mark { background: #fef08a; border-radius: 2px; padding: 0 2px; color: inherit; }

/* ── Empty State ────────────────────────────────────────── */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 1.5rem;
    text-align: center;
    color: var(--color-text-muted);
}
.empty-state svg { width: 56px; height: 56px; color: var(--color-text-light); margin-bottom: 1rem; }
.empty-state h3  { font-size: var(--font-size-base); font-weight: 600; color: var(--color-text); margin-bottom: .5rem; }
.empty-state p   { font-size: var(--font-size-sm); }

/* ── Utilities ──────────────────────────────────────────── */
.d-flex { display: flex; }
.d-none { display: none !important; }
.d-block { display: block; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: .25rem; }
.gap-2 { gap: .5rem; }
.gap-3 { gap: .75rem; }
.gap-4 { gap: 1rem; }
.flex-1 { flex: 1; }
.flex-wrap { flex-wrap: wrap; }
.w-100 { width: 100%; }
.mt-1 { margin-top: .25rem; }
.mt-2 { margin-top: .5rem; }
.mt-3 { margin-top: .75rem; }
.mt-4 { margin-top: 1rem; }
.mb-1 { margin-bottom: .25rem; }
.mb-2 { margin-bottom: .5rem; }
.mb-3 { margin-bottom: .75rem; }
.mb-4 { margin-bottom: 1rem; }
.p-3  { padding: .75rem; }
.p-4  { padding: 1rem; }
.rounded { border-radius: var(--radius-md); }
.truncate { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.overflow-hidden { overflow: hidden; }
.sr-only { position: absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); border:0; }

/* ── Scrollbar ──────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--color-border-dark); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-light); }

/* ── Loading Spinner ────────────────────────────────────── */
.spinner {
    width: 20px; height: 20px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin .7s linear infinite;
    display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Toast Notification ─────────────────────────────────── */
#toast-container {
    position: fixed;
    bottom: 1.25rem;
    left: 1.25rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: .5rem;
    pointer-events: none;
}
.toast {
    background: var(--color-text);
    color: #fff;
    padding: .625rem 1rem;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    box-shadow: var(--shadow-lg);
    min-width: 220px;
    pointer-events: auto;
    animation: toastIn .25s ease forwards;
}
.toast.success { background: #15803d; }
.toast.error   { background: #b91c1c; }
.toast.warning { background: #b45309; }
@keyframes toastIn { from { opacity:0; transform: translateY(10px); } to { opacity:1; transform: translateY(0); } }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 900px) {
    .sidebar { position: fixed; right: 0; top: 0; height: 100%; transform: translateX(100%); box-shadow: var(--shadow-lg); }
    .sidebar.open { transform: translateX(0); }
    .note-list-panel { width: 100%; position: fixed; inset: 0; z-index: 200; transform: translateX(100%); transition: transform .25s; }
    .note-list-panel.open { transform: translateX(0); }
    :root { --notelist-width: 100%; }
}
@media (max-width: 480px) {
    .kanban-col { width: 240px; }
    .modal { max-width: 100%; border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
}

/* ── Fallback اگر فونت woff2 لود نشد ──────────────────── */
@supports not (src: url('') format('woff2')) {
    body { font-family: Tahoma, Arial, sans-serif; }
}

/* ── Upload Drop Zone ───────────────────────────────────── */
.upload-dropzone {
    border: 2px dashed var(--color-border-dark);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: border-color var(--transition), background var(--transition);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}
.upload-dropzone:hover,
.upload-dropzone.dragover {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
}
.upload-dropzone svg { margin: 0 auto .5rem; display: block; width: 32px; height: 32px; }

/* ── Attachment Panel ───────────────────────────────────── */
.attachment-panel {
    border-top: 1px solid var(--color-border);
    padding: .875rem 1.5rem;
    background: var(--color-bg);
}
.attachment-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: .625rem;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-muted);
}
.attachment-item {
    transition: border-color var(--transition);
}
.attachment-item:hover { border-color: var(--color-border-dark) !important; }

/* ── Notebook Card hover ────────────────────────────────── */
.notebook-card { transition: box-shadow var(--transition), transform var(--transition); }
.notebook-card:hover { transform: translateY(-2px); }

/* ── Search highlight ───────────────────────────────────── */
mark {
    background: #fef08a;
    border-radius: 2px;
    padding: 0 2px;
    color: inherit;
}