/* ================================================================
   StudentOS — patches30.css
   1.  Undo bar notification (block deleted / undo)
   2.  Formula modal tab badge (custom formula count)
   3.  Worksheet title input (editable, above board)
   4.  Block type left-border colour coding
   5.  Duplicate button — subtle style in action strip
   6.  Print styles (@media print)
   7.  Minor layout polish — sticky toolbar, wider board
   ================================================================ */

/* ================================================================
   1.  UNDO BAR
   ================================================================ */
#p30-undo-bar {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 9950;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 11px 18px;
    border-radius: 13px;
    background: var(--glass-panel);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(28px);
    -webkit-backdrop-filter: blur(28px);
    box-shadow: 0 8px 32px rgba(0,0,0,.30);
    font-size: .82rem;
    color: var(--text-main);
    white-space: nowrap;
    animation: p30-bar-in .22s cubic-bezier(.34,1.56,.64,1) both;
}
@keyframes p30-bar-in {
    from { opacity: 0; transform: translateX(-50%) translateY(14px) scale(.96); }
    to   { opacity: 1; transform: translateX(-50%) translateY(0)    scale(1);   }
}
#p30-undo-bar.p30-undo-hide {
    opacity: 0;
    transform: translateX(-50%) translateY(8px);
    transition: opacity .28s, transform .28s;
}

#p30-undo-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 12px;
    border-radius: 8px;
    border: 1.5px solid var(--accent);
    background: color-mix(in srgb, var(--accent) 12%, transparent);
    color: var(--accent);
    font-size: .78rem;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: background .12s;
}
#p30-undo-btn:hover {
    background: color-mix(in srgb, var(--accent) 22%, transparent);
}

/* ================================================================
   2.  FORMULA MODAL — TAB BADGE
   ================================================================ */
.p30-tab-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 16px;
    height: 16px;
    padding: 0 5px;
    margin-left: 6px;
    border-radius: 99px;
    background: color-mix(in srgb, var(--accent) 18%, transparent);
    border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
    font-size: .6rem;
    font-weight: 800;
    color: var(--accent);
    vertical-align: middle;
}
.p28-modal-tab.active .p30-tab-badge {
    background: var(--accent);
    border-color: transparent;
    color: #fff;
}

/* ================================================================
   3.  WORKSHEET TITLE INPUT
   ================================================================ */
#p30-ws-title {
    display: block;
    width: 100%;
    background: none;
    border: none;
    border-bottom: 1.5px solid transparent;
    outline: none;
    font-size: 1.55rem;
    font-weight: 300;
    color: var(--text-main);
    font-family: inherit;
    padding: 2px 0 6px;
    margin-bottom: 10px;
    transition: border-color .15s;
    flex-shrink: 0;
}
#p30-ws-title:hover {
    border-bottom-color: var(--glass-border);
}
#p30-ws-title:focus {
    border-bottom-color: var(--accent);
}
#p30-ws-title::placeholder {
    color: var(--text-muted);
    opacity: .35;
    font-weight: 300;
}

/* ================================================================
   4.  BLOCK TYPE — LEFT-BORDER COLOUR CODING
       Each block type gets a subtle 3-px left accent so users
       can scan block types at a glance without heavy chrome.
   ================================================================ */

/* Heading — accent colour (already has border-left from patches19) */
.p19-ws-block.heading-block {
    border-left-width: 4px;
    border-left-color: var(--accent);
}

/* Text / note — muted teal */
.p19-ws-block.note-block {
    border-left: 3px solid rgba(20, 184, 166, .5);
}

/* Formula — accent (blue by default) */
.p19-ws-block.formula-block {
    border-left: 3px solid color-mix(in srgb, var(--accent) 60%, transparent);
}

/* Checklist — green */
.p28-checklist-block.p19-ws-block,
.p19-ws-block:has(.p28-checklist-block) {
    border-left: 3px solid rgba(34, 197, 94, .55);
}

/* Code block — amber */
.p28-code-block.p19-ws-block,
.p19-ws-block:has(.p28-code-block) {
    border-left: 3px solid rgba(245, 158, 11, .55);
}

/* Table block (patches27) — purple */
.p27-table-block.p19-ws-block,
.p19-ws-block:has(.p27-table-block) {
    border-left: 3px solid rgba(139, 92, 246, .55);
}

/* Callout block (patches27) — inherit from callout variant */
.p27-callout-block.p19-ws-block {
    border-left-width: 3px;
}

/* ================================================================
   5.  DUPLICATE BUTTON — ACTION STRIP
       The duplicate button reuses .p19-ws-block-btn already defined
       in patches19.css.  This only overrides the hover colour so it
       is visually distinct from the drag-handle and delete button.
   ================================================================ */
.p19-ws-block-btn[title="Duplicate block"]:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: color-mix(in srgb, var(--accent) 10%, transparent);
}

/* ================================================================
   6.  TOOLBAR — PRINT BUTTON SPACING
   ================================================================ */
#p19-ws-toolbar .p19-ws-tb-btn[title="Print worksheet"] {
    /* Same style as the existing toolbar buttons; no extra rules needed.
       Gap is handled by flexbox.  This selector is here as a hook for
       future customisation. */
}

/* ================================================================
   7.  LAYOUT POLISH
   ================================================================ */

/* Give the board a small horizontal scroll boundary on narrow
   screens so long formula expressions don't clip */
#p19-ws-board {
    overflow-x: hidden;
}

/* Formula block result value — slightly larger on wide screens */
@media (min-width: 900px) {
    .p29-result-val {
        font-size: 1.55rem;
    }
}

/* Block insertion animation */
.p19-ws-block {
    animation: p30-block-in .18s ease both;
}
@keyframes p30-block-in {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0);   }
}
/* Only animate newly-added blocks, not re-renders.
   We can't reliably distinguish, so keep the duration very short to avoid
   jarring full-board re-render flash. */

/* ================================================================
   8.  PRINT STYLES
   ================================================================ */
@media print {
    /* Hide navigation, sidebar, modals, overlays */
    #sidebar, #modal-overlay, #p30-undo-bar,
    #p19-ws-toolbar, #p19-ws-sv-bar,
    .p19-ws-block-actions, .p28-resize-handle,
    #p19-ws-add-btn-fixed, #p28-ws-shortcut-hint,
    #p28-ws-empty-state {
        display: none !important;
    }

    /* Make the board fill the page */
    #p19-ws-board {
        overflow: visible !important;
        padding: 0 !important;
    }

    .p19-ws-block {
        border: 1px solid #e2e8f0 !important;
        border-left-width: 3px !important;
        break-inside: avoid;
        box-shadow: none !important;
        animation: none !important;
    }

    /* Reset glass backgrounds to white for print */
    .p19-ws-block,
    .p29-result-panel,
    .p28-code-textarea {
        background: #fff !important;
    }
}