/* ================================================================
   StudentOS — patches19.css
   1.  Background tint — apply user colour via CSS variable
   2.  Worksheet whiteboard — full-width block canvas
   3.  Formula modal — cleaner variable inputs
   4.  Task drag-and-drop — pointer event fallback
   5.  Routine — improved weekly layout
   6.  Avatar preview — larger, more reliable
   ================================================================ */

/* ================================================================
   1.  BACKGROUND TINT
       Override patches17 !important by using the CSS variable that
       the .ambient-light gradient already consumes.
       p19 patches setBg() to write --custom-bg instead of inline.
   ================================================================ */
.ambient-light {
    background: var(--custom-bg,
        radial-gradient(ellipse at 25% 0%,   rgba(59,130,246,.42),  transparent 52%),
        radial-gradient(ellipse at 90% 92%,  rgba(236,72,153,.32),  transparent 48%),
        radial-gradient(ellipse at 62% 50%,  rgba(139,92,246,.18),  transparent 42%),
        radial-gradient(ellipse at 5%  80%,  rgba(20,184,166,.12),  transparent 38%)
    ) !important;
}
[data-theme="light"] .ambient-light {
    background: var(--custom-bg,
        radial-gradient(ellipse at 25% 0%,   rgba(59,130,246,.24),  transparent 52%),
        radial-gradient(ellipse at 90% 92%,  rgba(236,72,153,.18),  transparent 48%),
        radial-gradient(ellipse at 62% 50%,  rgba(139,92,246,.12),  transparent 42%),
        radial-gradient(ellipse at 5%  80%,  rgba(20,184,166,.08),  transparent 38%)
    ) !important;
}

/* ================================================================
   2.  WORKSHEET WHITEBOARD
   ================================================================ */
#view-worksheet.p19-ws-active .p16-ws-layout { display: none !important; }
#view-worksheet.p19-ws-active #p16-ws-canvas { display: none !important; }

/* Full-width whiteboard canvas */
#p19-ws-board {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 4px 2px 60px;
    scroll-behavior: smooth;
}

/* Saved-values chip bar */
#p19-ws-sv-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 8px 2px;
    min-height: 32px;
    flex-shrink: 0;
}
.p19-ws-sv-chip {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 9px 3px 8px;
    border-radius: 99px;
    font-size: .68rem;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    background: color-mix(in srgb, var(--accent) 12%, transparent);
    border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
    color: var(--accent);
    cursor: default;
}
.p19-ws-sv-chip button {
    background: none;
    border: none;
    cursor: pointer;
    opacity: .55;
    padding: 0;
    font-size: .6rem;
    color: inherit;
    line-height: 1;
    display: flex;
}
.p19-ws-sv-chip button:hover { opacity: 1; }

/* Toolbar */
#p19-ws-toolbar {
    display: flex;
    align-items: center;
    gap: 6px;
    padding-bottom: 10px;
    flex-shrink: 0;
    flex-wrap: wrap;
}
.p19-ws-tb-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 10px;
    font-size: .74rem;
    font-weight: 600;
    cursor: pointer;
    background: var(--glass-panel);
    border: 1px solid var(--glass-border);
    color: var(--text-muted);
    transition: all .14s;
    white-space: nowrap;
}
.p19-ws-tb-btn:hover {
    background: var(--glass-hover);
    color: var(--text-main);
    border-color: color-mix(in srgb, var(--accent) 30%, transparent);
}
.p19-ws-tb-btn.primary {
    background: var(--accent);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 2px 10px rgba(59,130,246,.25);
}
.p19-ws-tb-btn.primary:hover { opacity: .9; }
.p19-ws-tb-btn.danger {
    background: rgba(239,68,68,.1);
    color: #f87171;
    border-color: rgba(239,68,68,.2);
}
.p19-ws-tb-btn.danger:hover { background: rgba(239,68,68,.2); }

/* Block common */
.p19-ws-block {
    background: var(--glass-panel);
    border: 1.5px solid var(--glass-border);
    border-radius: 16px;
    padding: 16px 18px;
    position: relative;
    transition: border-color .15s, box-shadow .15s;
}
.p19-ws-block:hover {
    border-color: color-mix(in srgb, var(--accent) 22%, transparent);
}
.p19-ws-block.drag-over {
    border-color: var(--accent) !important;
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 20%, transparent);
}
.p19-ws-block.drag-src { opacity: .4; }

/* Block action row */
.p19-ws-block-actions {
    position: absolute;
    top: 10px;
    right: 12px;
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: opacity .15s;
}
.p19-ws-block:hover .p19-ws-block-actions { opacity: 1; }
.p19-ws-block-btn {
    width: 26px;
    height: 26px;
    border-radius: 7px;
    background: var(--glass-hover);
    border: 1px solid var(--glass-border);
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .65rem;
    transition: all .12s;
}
.p19-ws-block-btn:hover { background: var(--glass-hover); color: var(--text-main); border-color: var(--accent); }
.p19-ws-block-btn.del:hover { background: rgba(239,68,68,.15); color: #f87171; border-color: #f87171; }
.p19-ws-block-btn.handle { cursor: grab; }
.p19-ws-block-btn.handle:active { cursor: grabbing; }

/* Heading block */
.p19-ws-block.heading-block {
    border-left: 4px solid var(--accent);
    padding-left: 16px;
}
.p19-ws-heading-input {
    background: none;
    border: none;
    outline: none;
    width: 100%;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.25;
    padding: 0;
    font-family: inherit;
}
.p19-ws-heading-input::placeholder { color: var(--text-muted); opacity: .45; }

/* Text note block */
.p19-ws-block.note-block {
    padding-top: 14px;
}
.p19-ws-note-textarea {
    background: none;
    border: none;
    outline: none;
    width: 100%;
    min-height: 72px;
    resize: none;
    font-size: .88rem;
    color: var(--text-main);
    line-height: 1.6;
    padding: 0;
    font-family: inherit;
    field-sizing: content;
}
.p19-ws-note-textarea::placeholder { color: var(--text-muted); opacity: .45; }

/* Divider block */
.p19-ws-block.divider-block {
    padding: 10px 18px;
    background: transparent;
    border-color: transparent;
}
.p19-ws-block.divider-block hr {
    border: none;
    border-top: 1px solid var(--glass-border);
    margin: 0;
}
.p19-ws-block.divider-block:hover { background: transparent; border-color: var(--glass-border); }

/* Formula block */
.p19-ws-block.formula-block {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.p19-ws-formula-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 10px;
    flex-wrap: wrap;
}
.p19-ws-formula-title {
    font-size: .88rem;
    font-weight: 700;
    color: var(--text-main);
    flex: 1;
    min-width: 0;
}
.p19-ws-formula-expr {
    font-size: .78rem;
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent);
    background: color-mix(in srgb, var(--accent) 8%, transparent);
    border: 1px solid color-mix(in srgb, var(--accent) 18%, transparent);
    border-radius: 8px;
    padding: 5px 10px;
    line-height: 1.5;
    word-break: break-all;
    max-width: 100%;
}
.p19-ws-vars-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 8px;
}
.p19-ws-var-row {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--glass-hover);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 7px 10px;
    transition: border-color .13s;
}
.p19-ws-var-row:focus-within { border-color: var(--accent); }
.p19-ws-var-sym {
    font-size: .78rem;
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent);
    min-width: 28px;
    flex-shrink: 0;
}
.p19-ws-var-eq { font-size: .7rem; color: var(--text-muted); flex-shrink: 0; }
.p19-ws-var-input {
    flex: 1;
    min-width: 0;
    background: none;
    border: none;
    outline: none;
    font-size: .8rem;
    color: var(--text-main);
    font-family: 'JetBrains Mono', monospace;
    text-align: right;
}
.p19-ws-var-input::placeholder { color: var(--text-muted); opacity: .5; font-size: .72rem; font-family: inherit; }
.p19-ws-var-solve-ring {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 2px solid var(--glass-border);
    flex-shrink: 0;
    cursor: pointer;
    transition: all .13s;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .52rem;
    color: transparent;
}
.p19-ws-var-solve-ring.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}
.p19-ws-var-solve-ring:hover:not(.active) { border-color: var(--accent); }

/* Formula actions */
.p19-ws-formula-actions {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}
.p19-ws-formula-solve-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 14px;
    border-radius: 9px;
    font-size: .76rem;
    font-weight: 600;
    background: var(--accent);
    color: #fff;
    border: none;
    cursor: pointer;
    transition: opacity .12s;
}
.p19-ws-formula-solve-btn:hover { opacity: .88; }

/* Result display */
.p19-ws-result {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: 12px;
    background: color-mix(in srgb, var(--accent) 8%, transparent);
    border: 1.5px solid color-mix(in srgb, var(--accent) 22%, transparent);
    flex-wrap: wrap;
    gap: 8px;
}
.p19-ws-result-val {
    font-size: 1.35rem;
    font-weight: 800;
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent);
    line-height: 1;
}
.p19-ws-result-sym {
    font-size: .75rem;
    font-weight: 700;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
}
.p19-ws-saveas-row {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-left: auto;
}
.p19-ws-saveas-inp {
    padding: 4px 9px;
    border-radius: 7px;
    border: 1px solid var(--glass-border);
    background: var(--glass-hover);
    font-size: .73rem;
    color: var(--text-main);
    outline: none;
    width: 120px;
    transition: border-color .12s;
}
.p19-ws-saveas-inp:focus { border-color: var(--accent); }
.p19-ws-saveas-btn {
    padding: 4px 9px;
    border-radius: 7px;
    border: 1px solid var(--glass-border);
    background: var(--glass-hover);
    font-size: .72rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: all .12s;
    display: flex;
    align-items: center;
    gap: 4px;
}
.p19-ws-saveas-btn:hover { border-color: var(--accent); color: var(--accent); }

/* Formula picker sheet */
#p19-ws-picker {
    position: fixed;
    inset: 0;
    z-index: 900;
    display: flex;
    align-items: flex-end;
    pointer-events: none;
    opacity: 0;
    transition: opacity .2s;
}
#p19-ws-picker.open {
    pointer-events: auto;
    opacity: 1;
}
#p19-ws-picker-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,.45);
    backdrop-filter: blur(4px);
}
#p19-ws-picker-sheet {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 560px;
    margin: 0 auto;
    background: var(--bg-color);
    border-radius: 20px 20px 0 0;
    border: 1px solid var(--glass-border);
    padding: 20px 20px 32px;
    max-height: 70vh;
    overflow-y: auto;
    transform: translateY(100%);
    transition: transform .26s cubic-bezier(.22,1,.36,1);
}
#p19-ws-picker.open #p19-ws-picker-sheet { transform: translateY(0); }
.p19-picker-section {
    margin-bottom: 18px;
}
.p19-picker-section-hdr {
    font-size: .62rem;
    text-transform: uppercase;
    letter-spacing: .07em;
    font-weight: 700;
    color: var(--text-muted);
    margin-bottom: 8px;
}
.p19-picker-block-types {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 7px;
}
.p19-picker-type-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    padding: 11px 6px;
    border-radius: 12px;
    background: var(--glass-panel);
    border: 1.5px solid var(--glass-border);
    cursor: pointer;
    transition: all .14s;
    font-size: .66rem;
    color: var(--text-muted);
    font-weight: 600;
}
.p19-picker-type-btn i { font-size: .95rem; color: var(--accent); }
.p19-picker-type-btn:hover { background: var(--glass-hover); border-color: var(--accent); color: var(--text-main); }
.p19-picker-formula-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 7px;
}
.p19-picker-formula-card {
    padding: 10px 12px;
    border-radius: 11px;
    background: var(--glass-panel);
    border: 1.5px solid var(--glass-border);
    cursor: pointer;
    transition: all .14s;
}
.p19-picker-formula-card:hover { background: var(--glass-hover); border-color: var(--accent); }
.p19-picker-formula-title { font-size: .78rem; font-weight: 600; color: var(--text-main); margin-bottom: 2px; }
.p19-picker-formula-expr  { font-size: .67rem; font-family: 'JetBrains Mono', monospace; color: var(--text-muted); word-break: break-all; }

/* Add block button at bottom of board */
#p19-ws-add-btn-fixed {
    position: sticky;
    bottom: 16px;
    align-self: flex-start;
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 8px 16px;
    border-radius: 99px;
    background: var(--accent);
    color: #fff;
    font-size: .78rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(59,130,246,.35);
    transition: opacity .14s, transform .14s;
    z-index: 10;
}
#p19-ws-add-btn-fixed:hover { opacity: .9; transform: translateY(-1px); }

/* ================================================================
   3.  FORMULA MODAL — hide unit and category selects to reduce clutter
   ================================================================ */
/* Hide category and unit select columns in the variable rows */
#p16-fv-rows .p16-fv-ci,
#p16-fv-rows .p16-fv-ui {
    display: none !important;
}
/* Shrink the grid accordingly: sym | name | delete */
#p16-fv-rows .p16-fv-row {
    grid-template-columns: 48px 1fr 26px !important;
}

/* ================================================================
   4.  TASK DRAG AND DROP — pointer events fallback
   ================================================================ */
#full-task-list .task-row { touch-action: none; user-select: none; }
#full-task-list .task-row[data-dragstate="src"]  { opacity: .35; }
#full-task-list .task-row[data-dragstate="over"] {
    background: color-mix(in srgb, var(--accent) 10%, transparent) !important;
    border-radius: 12px;
    outline: 2px dashed var(--accent);
    outline-offset: -2px;
}
.task-drag-handle {
    cursor: grab !important;
    touch-action: none;
    color: var(--text-muted);
    opacity: .4;
    transition: opacity .15s;
}
.task-drag-handle:hover { opacity: .9 !important; }

/* ================================================================
   5.  ROUTINE — better weekly layout
   ================================================================ */
/* Today column highlight */
.p16-day-col .p16-day-hdr.today {
    color: var(--accent) !important;
    font-weight: 800;
}
.p16-day-col:has(.p16-day-hdr.today) {
    background: color-mix(in srgb, var(--accent) 5%, transparent);
    border-radius: 12px;
}

/* Routine block polish */
.p16-routine-block {
    transition: transform .12s, box-shadow .12s;
}
.p16-routine-block:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 18px rgba(0,0,0,.18);
}

/* Progress bar colour */
.p18-routine-progress {
    background: var(--glass-panel);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 9px 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    flex-shrink: 0;
}
.p18-routine-progress-bar {
    flex: 1;
    height: 5px;
    border-radius: 99px;
    background: var(--glass-hover);
    overflow: hidden;
}
.p18-routine-progress-fill {
    height: 100%;
    border-radius: 99px;
    background: var(--accent);
    transition: width .35s;
}
.p18-routine-progress-lbl {
    font-size: .7rem;
    font-weight: 700;
    color: var(--text-muted);
    white-space: nowrap;
    font-family: 'JetBrains Mono', monospace;
}
/* Done-today block style */
.p16-routine-block.p18-done-today {
    opacity: .55;
}
.p16-routine-block.p18-done-today .p16-rb-label {
    text-decoration: line-through;
}
.p18-rb-done-btn {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 1.5px solid var(--glass-border);
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .55rem;
    color: transparent;
    transition: all .13s;
}
.p18-rb-done-btn:hover { border-color: #22c55e; color: #22c55e; }
.p18-rb-done-btn.done { background: #22c55e; border-color: #22c55e; color: #fff; }

/* ================================================================
   6.  AVATAR PREVIEW — large reliable display
   ================================================================ */
#p16-settings-avatar,
#p19-settings-avatar {
    width: 80px !important;
    height: 80px !important;
    border-radius: 20px !important;
    flex-shrink: 0 !important;
    overflow: hidden !important;
    background: var(--accent);
    display: flex !important;
    align-items: center;
    justify-content: center;
    font-size: 2.2rem;
    box-shadow: 0 4px 20px rgba(0,0,0,.22);
    cursor: pointer;
    transition: box-shadow .2s;
}
#p16-settings-avatar:hover,
#p19-settings-avatar:hover { box-shadow: 0 6px 28px rgba(0,0,0,.32); }
#p16-settings-avatar img,
#p19-settings-avatar img {
    width: 100% !important;
    height: 100% !important;
    object-fit: cover !important;
}

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 600px) {
    .p19-picker-block-types { grid-template-columns: repeat(2, 1fr); }
    .p19-ws-vars-grid { grid-template-columns: 1fr; }
    #p19-ws-picker-sheet { border-radius: 16px 16px 0 0; }
}