/* ================================================================
   PK Simulator v3 – pks.css
   Theme: White / light, clinical precision
================================================================ */
@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Syne:wght@700;800&family=Inter:wght@300;400;500;600&display=swap');

/* ── Variables ── */
:root {
    --bg:       #ffffff;
    --surf:     #f8f9fb;
    --surf2:    #f0f2f6;
    --border:   #dde1ea;
    --border2:  #c8cdd9;
    --text:     #1a1f2e;
    --muted:    #6b7384;
    --accent:   #0d7a5f;       /* teal, clinical */
    --accent2:  #1e62d0;       /* blue  */
    --danger:   #d63b3b;
    --warn:     #c47a00;
    --bolus:    #b45c00;       /* amber on white */
    --infusion: #1e62d0;
    --shadow:   0 1px 4px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.05);

    --hdr-h:    52px;
    --sidebar:  256px;
    --r:        7px;
    --ff:       'Inter', sans-serif;
    --mono:     'DM Mono', monospace;
    --display:  'Syne', sans-serif;
}

/* ── Reset ── */
#pks-app, #pks-app * { box-sizing: border-box; margin: 0; padding: 0; }
#pks-app {
    font-family: var(--ff);
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--r);
    overflow: hidden;
    min-height: 88vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow);
}

/* ================================================================
   HEADER
================================================================ */
.pks-header {
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: stretch;
    flex-shrink: 0;
    flex-wrap: nowrap;      /* keep all sections on one row so upload stays right */
    min-height: var(--hdr-h);
    position: relative;
    z-index: 10;
    overflow-x: auto;       /* allow horizontal scroll on very narrow screens */
}

/* Branding */
.pks-logo {
    display: flex;
    align-items: center;
    padding: 0 20px;
    border-right: 1px solid var(--border);
    flex-shrink: 0;
}
.pks-logo-text {
    font-family: var(--display);
    font-size: 17px;
    font-weight: 800;
    letter-spacing: -.3px;
    color: var(--accent);
    white-space: nowrap;
}

/* Sections */
.pks-hdr-section {
    display: flex;
    align-items: stretch;
    border-right: 1px solid var(--border);
}
/* Upload section — pinned to far right of header */
.pks-hdr-upload {
    margin-left: auto;       /* push to right edge */
    border-right: none;
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: row;
    align-items: center;
    padding: 0;
    flex-shrink: 0;          /* never collapse below button width */
}
.pks-hdr-upload .pks-hdr-actions {
    padding: 0 14px;
    display: flex;
    align-items: center;
}

.pks-hdr-label {
    font-size: 9px;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--muted);
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    padding: 10px 7px;
    border-right: 1px solid var(--border);
    background: var(--surf);
    flex-shrink: 0;
    user-select: none;
}

.pks-hdr-fields {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 14px;
    flex-wrap: wrap;
}
.pks-hdr-fields label {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.pks-hdr-fields label span {
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--muted);
    font-weight: 600;
}
.pks-hdr-fields input,
.pks-hdr-fields select {
    background: var(--surf2);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 4px;
    padding: 4px 7px;
    font-family: var(--mono);
    font-size: 12px;
    width: 74px;
    outline: none;
    transition: border-color .15s;
}
.pks-hdr-fields select { width: 82px; }
.pks-hdr-fields input:focus,
.pks-hdr-fields select:focus { border-color: var(--accent); }

.pks-hdr-actions {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 0 14px;
    flex-wrap: wrap;
}

/* Upload feedback label below button */
#pks-upload-feedback {
    font-size: 9px;
    color: var(--accent);
    padding: 2px 14px 0;
    white-space: nowrap;
    text-align: right;
}

/* ── Buttons ── */
.pks-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    border-radius: 5px;
    padding: 6px 13px;
    font-family: var(--ff);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all .14s;
    letter-spacing: .02em;
    white-space: nowrap;
    border: 1px solid transparent;
    height: 30px;           /* uniform height for all header buttons */
}
.pks-btn svg { width: 13px; height: 13px; flex-shrink: 0; }

.pks-btn-accent   { background: var(--accent); color: #fff; border-color: var(--accent); }
.pks-btn-accent:hover { filter: brightness(1.1); }

.pks-btn-bolus    { background: rgba(180,92,0,.08); color: var(--bolus); border-color: rgba(180,92,0,.30); }
.pks-btn-bolus:hover  { background: rgba(180,92,0,.16); }

.pks-btn-infusion { background: rgba(30,98,208,.08); color: var(--infusion); border-color: rgba(30,98,208,.28); }
.pks-btn-infusion:hover { background: rgba(30,98,208,.16); }

.pks-btn-upload   { background: var(--surf2); color: var(--accent2); border-color: var(--border2); }
.pks-btn-upload:hover { background: var(--accent2); color: #fff; border-color: var(--accent2); }

.pks-btn-ghost    { background: none; color: var(--muted); border-color: var(--border); }
.pks-btn-ghost:hover { border-color: var(--danger); color: var(--danger); }

/* Toggles */
.pks-toggle-group { display: flex; gap: 4px; }
.pks-toggle {
    background: var(--surf2);
    border: 1px solid var(--border);
    color: var(--muted);
    border-radius: 4px;
    padding: 4px 11px;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--ff);
    transition: all .14s;
    height: 28px;
}
.pks-toggle.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

/* ================================================================
   BODY
================================================================ */
.pks-body {
    display: flex;
    flex: 1;
    overflow: hidden;
    min-height: 0;
}

/* ================================================================
   SIDEBAR
================================================================ */
.pks-sidebar {
    width: var(--sidebar);
    flex-shrink: 0;
    background: var(--surf);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.pks-sidebar-header {
    padding: 11px 12px 8px;
    border-bottom: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 7px;
    background: var(--bg);
}
.pks-sidebar-header > span {
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: var(--muted);
    font-weight: 700;
}
#pks-search {
    background: var(--surf2);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 5px 9px;
    color: var(--text);
    font-family: var(--ff);
    font-size: 12px;
    outline: none;
    width: 100%;
    transition: border-color .15s;
}
#pks-search:focus { border-color: var(--accent); }

.pks-model-list {
    flex: 1;
    overflow-y: auto;
    padding: 5px 0;
}
.pks-model-list::-webkit-scrollbar { width: 3px; }
.pks-model-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.pks-drug-heading {
    font-size: 9px;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--muted);
    padding: 8px 12px 3px;
    user-select: none;
}

.pks-model-item {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 6px 12px;
    cursor: pointer;
    transition: background .1s;
    user-select: none;
}
.pks-model-item:hover  { background: var(--surf2); }
.pks-model-item.selected { background: rgba(13,122,95,.07); }

.pks-model-check {
    width: 15px; height: 15px;
    border-radius: 3px;
    flex-shrink: 0;
    border: 2px solid var(--border2);
    transition: all .14s;
    position: relative;
}
.pks-model-item.selected .pks-model-check {
    background: var(--accent);
    border-color: var(--accent);
}
.pks-model-item.selected .pks-model-check::after {
    content: '';
    position: absolute;
    left: 2px; top: 0;
    width: 5px; height: 8px;
    border: 2px solid #fff;
    border-top: none; border-left: none;
    transform: rotate(45deg);
}
.pks-model-swatch {
    width: 4px; height: 22px;
    border-radius: 2px;
    flex-shrink: 0;
    background: var(--border);
}
.pks-model-info { flex: 1; min-width: 0; }
.pks-model-drug {
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text);
}
.pks-model-sub {
    font-size: 10px;
    color: var(--muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.pks-compartment-badge {
    font-size: 9px;
    font-family: var(--mono);
    background: var(--surf2);
    border: 1px solid var(--border);
    border-radius: 3px;
    padding: 1px 4px;
    color: var(--muted);
    flex-shrink: 0;
}
.pks-evt-dot {
    width: 7px; height: 7px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
    box-shadow: 0 0 0 2px rgba(13,122,95,.25);
}
.pks-spinner { padding: 14px 12px; color: var(--muted); font-size: 12px; }

/* ================================================================
   MAIN
================================================================ */
.pks-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    padding: 13px;
    background: var(--bg);
}

.pks-chart-controls {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 9px;
    flex-wrap: wrap;
}
.pks-chart-meta {
    font-size: 11px;
    color: var(--muted);
    font-family: var(--mono);
}

.pks-chart-wrap {
    flex: 1;
    position: relative;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--r);
    overflow: hidden;
    min-height: 300px;
}
#pks-chart { width: 100% !important; height: 100% !important; }

.pks-chart-empty {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--muted);
    font-size: 13px;
    pointer-events: none;
    padding: 20px;
    line-height: 1.7;
}
.pks-chart-empty strong { color: var(--text); }

.pks-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin-top: 9px;
}
.pks-legend-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 11px;
    background: var(--surf);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 3px 9px;
    color: var(--text);
}
.pks-legend-swatch { width: 18px; height: 3px; border-radius: 2px; }
.pks-legend-dash   { width: 18px; height: 0; border-bottom: 2px dashed; opacity: .7; }
.pks-legend-name   { font-weight: 600; }
.pks-legend-type   { color: var(--muted); }

/* ── Event panel ── */
#pks-event-panel {
    background: var(--surf);
    border: 1px solid var(--border);
    border-radius: var(--r);
    margin-top: 9px;
    overflow: hidden;
}
.pks-event-panel-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 13px;
    border-bottom: 1px solid var(--border);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--muted);
    background: var(--bg);
}
.pks-event-panel-header > span:first-child { flex: 1; }
.pks-ep-legend { font-size: 10px; color: var(--muted); text-transform: none; letter-spacing: 0; }

#pks-event-list { max-height: 190px; overflow-y: auto; }
#pks-event-list::-webkit-scrollbar { width: 3px; }
#pks-event-list::-webkit-scrollbar-thumb { background: var(--border); }

.pks-ev-row {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 6px 13px;
    border-bottom: 1px solid var(--border);
    font-size: 12px;
    transition: background .1s;
}
.pks-ev-row:last-child { border-bottom: none; }
.pks-ev-row:hover { background: var(--surf2); }
.pks-ev-icon  { font-size: 13px; flex-shrink: 0; }
.pks-ev-time  { font-family: var(--mono); font-size: 11px; color: var(--accent); width: 50px; flex-shrink: 0; }
.pks-ev-label { flex: 1; color: var(--text); }
.pks-ev-label strong { color: var(--text); }
.pks-ev-edit, .pks-ev-del {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 12px;
    padding: 2px 5px;
    border-radius: 3px;
    transition: all .14s;
    color: var(--muted);
}
.pks-ev-edit:hover { color: var(--accent2); background: rgba(30,98,208,.08); }
.pks-ev-del:hover  { color: var(--danger);  background: rgba(214,59,59,.08); }

/* ================================================================
   MODALS
================================================================ */
.pks-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15,20,35,.45);
    z-index: 9998;
    backdrop-filter: blur(2px);
}
.pks-modal-wrap {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    pointer-events: none;
}
.pks-modal-box {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 24px;
    max-width: 460px;
    width: 92%;
    position: relative;
    pointer-events: all;
    box-shadow: 0 8px 32px rgba(0,0,0,.14);
    animation: pks-up .17s ease;
}
@keyframes pks-up {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: none; }
}
.pks-modal-box h3 {
    font-family: var(--display);
    font-size: 16px;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--text);
}
.pks-modal-hint {
    font-size: 12px;
    color: var(--muted);
    margin-bottom: 14px;
    line-height: 1.5;
}
.pks-modal-close {
    position: absolute;
    top: 12px; right: 12px;
    background: none;
    border: none;
    color: var(--muted);
    font-size: 14px;
    cursor: pointer;
    transition: color .14s;
    line-height: 1;
    padding: 2px;
}
.pks-modal-close:hover { color: var(--text); }

.pks-form-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 12px;
}
.pks-form-field > label {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .07em;
    color: var(--muted);
}
.pks-form-row2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 11px;
}
.pks-input {
    background: var(--surf2);
    border: 1px solid var(--border);
    border-radius: 5px;
    padding: 7px 10px;
    color: var(--text);
    font-family: var(--ff);
    font-size: 13px;
    outline: none;
    transition: border-color .14s;
    width: 100%;
}
.pks-input:focus { border-color: var(--accent); }

/* ── Equal-width 3-column row (bolus: dose | unit | time) ── */
.pks-modal-row3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 6px;
}
.pks-modal-row3 .pks-modal-input {
    width: 100%;
    min-width: 0;
}
.pks-modal-row3-labels {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 6px;
    margin-top: 3px;
}
.pks-modal-row3-labels span {
    font-size: 9px;
    color: var(--muted);
    text-align: center;
    text-transform: uppercase;
    letter-spacing: .05em;
}

/* ── Equal-width 2-column row (infusion: rate | unit) ── */
.pks-modal-row2eq {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}
.pks-modal-row2eq .pks-modal-input {
    width: 100%;
    min-width: 0;
}
.pks-modal-row2eq-labels {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
    margin-top: 3px;
}
.pks-modal-row2eq-labels span {
    font-size: 9px;
    color: var(--muted);
    text-align: center;
    text-transform: uppercase;
    letter-spacing: .05em;
}

/* Input with unit badge/selector inline */
.pks-input-unit-wrap {
    display: flex;
    align-items: stretch;
    border: 1px solid var(--border);
    border-radius: 5px;
    /* NO overflow:hidden — it collapses number inputs in WordPress themes */
    transition: border-color .14s;
    width: 100%;
}
.pks-input-unit-wrap:focus-within { border-color: var(--accent); }

/* The number/text input inside the combined row */
.pks-input-unit-wrap .pks-input {
    border: none !important;  /* override WP theme borders */
    border-right: 1px solid var(--border) !important;
    border-radius: 5px 0 0 5px !important;
    flex: 1 1 0%;
    min-width: 80px;          /* guarantee it is never collapsed */
    width: 80px;              /* explicit base width; flex will grow it */
    box-sizing: border-box;
    padding: 7px 10px;
    background: #fff;
}
.pks-input-unit-wrap .pks-input:focus {
    box-shadow: none;
    outline: none;
}

.pks-unit-badge {
    display: flex;
    align-items: center;
    padding: 0 10px;
    background: var(--surf2);
    border: 1px solid var(--border);
    border-left: none;
    border-radius: 0 5px 5px 0;
    font-family: var(--mono);
    font-size: 10px;
    color: var(--muted);
    white-space: nowrap;
    user-select: none;
    flex-shrink: 0;
    box-sizing: border-box;
}
.pks-unit-select {
    border: 1px solid var(--border) !important;
    border-left: none !important;
    border-radius: 0 5px 5px 0;
    background: var(--surf2);
    color: var(--muted);
    font-family: var(--mono);
    font-size: 11px;
    padding: 0 8px;
    cursor: pointer;
    outline: none;
    flex-shrink: 0;
    height: 100%;
    min-height: 34px;
    box-sizing: border-box;
    -webkit-appearance: auto;
    appearance: auto;
}
.pks-unit-select:focus { color: var(--accent); }

.pks-modal-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 14px;
}
.pks-modal-feedback { font-size: 11px; line-height: 1.4; }

.pks-code-preview {
    background: var(--surf2);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 9px;
    font-family: var(--mono);
    font-size: 10px;
    color: var(--accent);
    max-height: 140px;
    overflow-y: auto;
    white-space: pre;
    margin-bottom: 12px;
}

/* ================================================================
   TOAST
================================================================ */
.pks-toast {
    position: fixed;
    bottom: 22px; right: 22px;
    z-index: 99999;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 9px 16px;
    font-size: 13px;
    font-family: var(--ff);
    box-shadow: 0 4px 18px rgba(0,0,0,.14);
    opacity: 0;
    transform: translateY(7px);
    transition: all .22s;
    pointer-events: none;
    color: var(--text);
}
.pks-toast.show   { opacity: 1; transform: none; }
.pks-toast-error  { border-color: var(--danger); color: var(--danger); }
.pks-toast-warn   { border-color: var(--warn);   color: var(--warn); }
.pks-toast-info   { border-color: var(--accent);  color: var(--accent); }

/* ================================================================
   RESPONSIVE
================================================================ */
@media (max-width: 800px) {
    .pks-header  { height: auto; flex-direction: column; }
    .pks-hdr-section { border-right: none; border-bottom: 1px solid var(--border); }
    .pks-hdr-upload  { margin-left: 0; border-left: none; }
    .pks-hdr-label   { writing-mode: initial; transform: none; padding: 4px 10px; border-right: none; border-bottom: 1px solid var(--border); }
    .pks-body        { flex-direction: column; }
    .pks-sidebar     { width: 100%; height: 180px; border-right: none; border-bottom: 1px solid var(--border); }
    .pks-model-list  { display: flex; flex-wrap: wrap; padding: 6px; gap: 4px; }
    .pks-drug-heading{ display: none; }
    .pks-model-item  { border: 1px solid var(--border); border-radius: 5px; padding: 4px 8px; }
    .pks-main        { padding: 8px; }
    .pks-form-row2   { grid-template-columns: 1fr; }
}