/* Deep Dive Books dashboard theme: the ONE theme file (light + dark). Modern slate/zinc "Tailwind + shadcn/ui" look.
   Every colour is a CSS variable; dark mode = html[data-theme=dark]. Loaded after app.css and Tabulator's CSS. */
/* Look: shadcn/Tailwind dashboard structure + finance-grade, dark-first metrics style (inspired by strive.com / strategy.com:
   near-black surfaces, bone-white type, one high-contrast orange accent, big tabular numbers). No third-party assets used. */
:root{
  --font:"IBM Plex Sans",Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --font-num:Inter,"IBM Plex Sans",ui-sans-serif,system-ui,sans-serif;
  --radius:12px;--radius-sm:8px;--ease:160ms cubic-bezier(.2,.7,.2,1);
  --bg:#f4f4f5;--card:#ffffff;--card-2:#fafafa;--side:#ffffff;--fg:#09090b;--fg-2:#3f3f46;--muted:#5f5f69;--line:#e4e4e7;--line-2:#d4d4d8;
  --hover:#f4f4f5;--ring:rgba(234,88,12,.35);--shadow:0 1px 2px rgba(9,9,11,.05),0 1px 3px rgba(9,9,11,.07);
  --brand:#c2410c;--brand-fg:#ffffff;--brand-soft:#fff1e6;--brand-text:#9a3412;--link:#b4400c;
  --ok:#047857;--ok-soft:#ecfdf5;--bad:#be123c;--bad-soft:#fff1f2;--warn:#a16207;--warn-soft:#fefce8;--hit:#be123c;
  --u-urgent:#e11d48;--u-urgent-bg:#ffe4e6;--u-urgent-fg:#9f1239;
  --u-soon:#eab308;--u-soon-bg:#fef9c3;--u-soon-fg:#854d0e;
  --u-whenever:#a1a1aa;--u-whenever-bg:#f4f4f5;--u-whenever-fg:#52525b;
  --c-set-bg:#e0f2fe;--c-set-fg:#075985;--c-zero-bg:#f4f4f5;--c-zero-fg:#52525b;--c-text-bg:#ede9fe;--c-text-fg:#5b21b6;
  --c-seas-bg:#dcfce7;--c-seas-fg:#166534;--c-info-bg:#f4f4f5;--c-info-fg:#3f3f46;
  --human:#fffbeb;--human-h:#fef3c7;--edited:#fff1e6;--flash:#fff1e6;--overlay:rgba(9,9,11,.5)
}
html[data-theme=dark]{color-scheme:dark;
  --bg:#0b0c0e;--card:#131418;--card-2:#17181d;--side:#0e0f12;--fg:#f4f2ee;--fg-2:#cfd1d6;--muted:#9a9ca4;--line:#24262c;--line-2:#363940;
  --hover:#1c1e23;--ring:rgba(251,146,60,.45);--shadow:0 1px 0 rgba(255,255,255,.03) inset,0 1px 2px rgba(0,0,0,.6);
  --brand:#f7931a;--brand-fg:#0b0c0e;--brand-soft:rgba(247,147,26,.13);--brand-text:#ffb25e;--link:#ffad4f;
  --ok:#34d399;--ok-soft:rgba(16,185,129,.14);--bad:#fb7185;--bad-soft:rgba(244,63,94,.15);--warn:#facc15;--warn-soft:rgba(234,179,8,.14);--hit:#fb7185;
  --u-urgent:#f43f5e;--u-urgent-bg:rgba(244,63,94,.18);--u-urgent-fg:#fda4af;
  --u-soon:#facc15;--u-soon-bg:rgba(234,179,8,.16);--u-soon-fg:#fde047;
  --u-whenever:#52525b;--u-whenever-bg:rgba(113,113,122,.22);--u-whenever-fg:#d4d4d8;
  --c-set-bg:rgba(56,189,248,.16);--c-set-fg:#7dd3fc;--c-zero-bg:rgba(113,113,122,.25);--c-zero-fg:#d4d4d8;--c-text-bg:rgba(167,139,250,.18);--c-text-fg:#c4b5fd;
  --c-seas-bg:rgba(34,197,94,.16);--c-seas-fg:#86efac;--c-info-bg:rgba(113,113,122,.2);--c-info-fg:#d4d4d8;
  --human:rgba(247,147,26,.05);--human-h:rgba(247,147,26,.12);--edited:rgba(247,147,26,.12);--flash:rgba(247,147,26,.2);--overlay:rgba(0,0,0,.72)
}
/* ---------- base */
html,body{background:var(--bg);color:var(--fg)}
body{font:14px/1.55 var(--font);-webkit-font-smoothing:antialiased;font-feature-settings:"cv11","ss01"}
a{color:var(--link);text-decoration:none;transition:color var(--ease)}a:hover{text-decoration:underline}
.muted{color:var(--muted)}.err{color:var(--bad)}
h2{font-size:26px;font-weight:700;letter-spacing:-.025em;line-height:1.15;margin:2px 0 16px;color:var(--fg)}h2 .small{font-size:13px;font-weight:500;letter-spacing:0}h3{font-size:15px;font-weight:600;color:var(--fg)}
code{background:var(--hover);padding:1px 5px;border-radius:6px;font-size:12px}
::selection{background:var(--brand-soft)}
*:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.ico{width:16px;height:16px;flex:none;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;vertical-align:-3px}
/* ---------- shell: top bar + left sidebar */
.top{position:sticky;top:0;z-index:30;height:56px;display:flex;align-items:center;gap:14px;padding:0 20px;background:color-mix(in srgb,var(--card) 85%,transparent);
  backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--line);color:var(--fg)}
.brand{display:flex;align-items:center;gap:10px;font-weight:650;letter-spacing:-.01em;width:200px}
.brand .logo{width:28px;height:28px;border-radius:8px;background:var(--brand);color:#fff;display:grid;place-items:center}
.top .who{margin-left:auto;gap:10px;color:var(--fg-2)}
#me{font-size:13px}
.top .btn{background:var(--card);color:var(--fg);border-color:var(--line)}
#nav{position:fixed;top:56px;left:0;bottom:0;width:232px;padding:14px 12px;display:flex;flex-direction:column;gap:2px;background:var(--side);
  border-right:1px solid var(--line);overflow:auto;z-index:20}
#nav a{display:flex;align-items:center;gap:10px;padding:7px 10px;border-radius:var(--radius-sm);color:var(--fg-2);font-weight:500;font-size:13.5px;
  transition:background var(--ease),color var(--ease)}
#nav a:hover{background:var(--hover);color:var(--fg);text-decoration:none}
#nav a.on{background:var(--brand-soft);color:var(--brand-text)}
#nav a.soon{opacity:1;color:var(--muted)}
#nav .navsep{height:1px;width:auto;background:var(--line);margin:10px 6px}
#nav .navlabel{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);padding:10px 10px 4px}
#nav .badge{margin-left:auto}
main{margin-left:232px;padding:22px 28px 40px;max-width:none}
@media (max-width:900px){#nav{position:static;width:auto;flex-direction:row;flex-wrap:wrap;border-right:0;border-bottom:1px solid var(--line)}main{margin-left:0;padding:14px}#nav .navsep,#nav .navlabel{display:none}.brand{width:auto}}
/* ---------- controls */
.btn{background:var(--card);color:var(--fg);border:1px solid var(--line);border-radius:var(--radius-sm);padding:6px 12px;font-weight:500;font-size:13px;line-height:1.4;
  box-shadow:0 1px 1px rgba(15,23,42,.04);transition:background var(--ease),border-color var(--ease),color var(--ease),box-shadow var(--ease)}
.btn:hover{background:var(--hover);border-color:var(--line-2)}
.btn.small{padding:3px 9px;font-size:12px;border-radius:7px}
.btn.primary{background:var(--brand);border-color:var(--brand);color:var(--brand-fg)}.btn.primary:hover{filter:brightness(1.08);background:var(--brand)}
.btn.buy{color:var(--ok);border-color:color-mix(in srgb,var(--ok) 45%,var(--line))}.btn.buy:hover{background:var(--ok-soft)}
.btn.pass{color:var(--fg-2);border-color:var(--line)}
.btn.danger{color:var(--bad);border-color:color-mix(in srgb,var(--bad) 45%,var(--line))}
.btn:disabled{opacity:.5;cursor:default}
input[type=text],input[type=search],input[type=password],input[type=email],select,textarea,.toolbar input,.acts input,.login-card input{
  background:var(--card)!important;color:var(--fg)!important;border:1px solid var(--line)!important;border-radius:var(--radius-sm)!important;padding:6px 10px!important;font:inherit;
  transition:border-color var(--ease),box-shadow var(--ease)}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand)!important;box-shadow:0 0 0 3px var(--ring)}
input::placeholder,textarea::placeholder{color:var(--muted)}
.toolbar{gap:8px;margin-bottom:12px}.count{color:var(--muted);font-size:13px}
.tabs{gap:4px;padding:4px;background:var(--hover);border-radius:10px;width:fit-content;margin-bottom:14px}
.tabs button{background:transparent;border:0;color:var(--fg-2);padding:6px 12px;border-radius:7px;font:500 13px var(--font);cursor:pointer;transition:background var(--ease),color var(--ease)}
.tabs button:hover{color:var(--fg)}.tabs button.on{background:var(--card);color:var(--fg);box-shadow:var(--shadow)}
.side .tabs{width:100%}
/* ---------- surfaces */
.card,.side,.stat,.grid-wrap,table.simple,.login-card,.modal-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.side{top:76px;padding:14px}.side h3{margin:12px 0 6px;font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.side label{font-size:13px;color:var(--fg-2)}
.banner{background:var(--brand-soft);border:1px solid color-mix(in srgb,var(--brand) 25%,var(--line));color:var(--fg-2);border-radius:var(--radius);padding:10px 14px}
.modal{background:var(--overlay);backdrop-filter:blur(2px)}.modal-card{padding:20px 22px}.modal .x{color:var(--muted)}
table.simple{border-collapse:separate;border-spacing:0;overflow:hidden}
table.simple th{background:var(--card-2);color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.04em;border-bottom:1px solid var(--line)}
table.simple td{border-bottom:1px solid var(--line);color:var(--fg)}table.simple tr:hover td{background:var(--hover)}
table.kv td{border-bottom:1px solid var(--line)}
#toast div{background:var(--fg);color:var(--bg);border-radius:10px;box-shadow:0 10px 25px rgba(0,0,0,.2)}#toast div.bad{background:var(--bad);color:#fff}
.held{background:var(--bad-soft);color:var(--bad)}
.mrow{background:var(--card-2);border:1px solid var(--line);border-radius:var(--radius-sm);color:var(--fg-2)}
.body{color:var(--fg-2)}.hist{color:var(--muted)}
/* ---------- KPI stat cards */
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:14px;margin:0 0 18px}
.kpi{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px 16px;transition:transform var(--ease),box-shadow var(--ease)}
.kpi:hover{transform:translateY(-1px)}
.kpi .k-lab{display:flex;align-items:center;gap:6px;font-size:11.5px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.07em}
.kpi .k-val{font-family:var(--font-num);font-size:34px;font-weight:700;letter-spacing:-.035em;line-height:1.15;margin-top:6px;color:var(--fg);font-variant-numeric:tabular-nums}
.kpi .k-sub{font-size:12px;color:var(--muted);margin-top:2px}
.delta{display:inline-flex;align-items:center;gap:2px;font-size:12px;font-weight:600;padding:1px 7px;border-radius:999px}
.delta.up{background:var(--ok-soft);color:var(--ok)}.delta.down{background:var(--bad-soft);color:var(--bad)}.delta.flat{background:var(--hover);color:var(--muted)}
.kpi.k-urgent .k-val{color:var(--u-urgent-fg)}html:not([data-theme=dark]) .kpi.k-urgent .k-val{color:var(--u-urgent)}
.stats .stat{padding:12px 16px}.stat b{font-size:24px;letter-spacing:-.02em}
/* ---------- pills: tags, chips, urgency, status */
.tag,.chip,.ubadge,.sbadge,.st{display:inline-flex;align-items:center;gap:4px;font-size:12px;font-weight:500;line-height:18px;padding:1px 9px;border-radius:999px;
  background:var(--c-info-bg);color:var(--c-info-fg);border:1px solid transparent;white-space:nowrap}
.tag.info{background:var(--c-info-bg);color:var(--c-info-fg)}
.tag.warn{background:var(--warn-soft);color:var(--warn);border-color:color-mix(in srgb,var(--warn) 25%,transparent)}
.tag.hit{background:var(--u-urgent-bg);color:var(--u-urgent-fg);font-weight:650}
html:not([data-theme=dark]) .tag.hit{color:var(--bad)}
.chip{font-weight:600}.chip.c-set{background:var(--c-set-bg);color:var(--c-set-fg)}.chip.c-zero{background:var(--c-zero-bg);color:var(--c-zero-fg)}
.chip.c-textbook{background:var(--c-text-bg);color:var(--c-text-fg)}.chip.c-seasonal{background:var(--c-seas-bg);color:var(--c-seas-fg)}
.chip.c-low_offers,.chip.c-warn{background:var(--warn-soft);color:var(--warn)}
.ubadge{font-weight:650;letter-spacing:.01em}.ubadge::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}
.ubadge.u-urgent{background:var(--u-urgent-bg);color:var(--u-urgent-fg)}.ubadge.u-soon{background:var(--u-soon-bg);color:var(--u-soon-fg)}
.ubadge.u-whenever{background:var(--u-whenever-bg);color:var(--u-whenever-fg)}
.sbadge{background:transparent;border-color:var(--line);color:var(--muted)}.sbadge.s-new{background:var(--brand-soft);color:var(--brand-text);border-color:transparent;font-weight:650}
.st-to-price{background:var(--brand-soft);color:var(--brand-text)}.st-priced{background:var(--ok-soft);color:var(--ok)}
.st-zero{background:var(--c-zero-bg);color:var(--c-zero-fg)}.st-gated{background:var(--bad-soft);color:var(--bad)}
.st-textbook{background:var(--c-text-bg);color:var(--c-text-fg)}.st-set,.st-set-{background:var(--c-set-bg);color:var(--c-set-fg)}
.st-counterfeit-risk{background:var(--warn-soft);color:var(--warn)}
.badge{background:var(--u-urgent);color:#fff;border-radius:999px;font-weight:600}
/* ---------- alert cards: urgency = left border + badge; interaction = weight/fade */
.card{padding:12px 16px;margin-bottom:10px;border-left-width:4px;transition:opacity var(--ease),box-shadow var(--ease),border-color var(--ease)}
.card:hover{box-shadow:0 4px 12px rgba(15,23,42,.08)}
.card[class*=" k-"]{border-left-color:var(--line)}
.card.u-urgent{border-left:4px solid var(--u-urgent)}.card.u-soon{border-left:4px solid var(--u-soon)}.card.u-whenever{border-left:4px solid var(--u-whenever)}
.card .hd{gap:8px;align-items:center}.card .kind{font-size:11px;font-weight:600;color:var(--muted);letter-spacing:.05em}
.card .ttl{font-size:15px;font-weight:550;color:var(--fg)}.card .price{font-weight:700;color:var(--fg)}
.card.s-new{background:linear-gradient(0deg,var(--card),var(--card)),var(--card);box-shadow:0 0 0 1px color-mix(in srgb,var(--brand) 22%,transparent),var(--shadow)}
.card.s-new .ttl{font-weight:750}.card.s-new .price{font-weight:800}
.card.s-seen .ttl{font-weight:550}
.card.s-acted{opacity:.55;box-shadow:none;background:var(--card-2)}.card.s-acted:hover{opacity:.95}
.card.s-acted .ttl{font-weight:500;color:var(--fg-2)}
.card.done{opacity:.55}
.card.new{animation:ddbflash 2.4s ease-out}@keyframes ddbflash{from{background:var(--flash)}to{background:var(--card)}}
.card .cardrow{display:flex;gap:12px;align-items:flex-start}.card .cardmain{flex:1;min-width:0}
.card .why{font-size:11.5px;color:var(--muted)}
.legend{font-size:12px;color:var(--fg-2)}.legend div{display:flex;gap:6px;align-items:center;margin:3px 0}
/* ---------- covers */
.cover{width:44px;height:66px;border-radius:6px;object-fit:cover;background:var(--hover);border:1px solid var(--line);cursor:zoom-in;flex:none;transition:transform var(--ease)}
.cover:hover{transform:scale(1.04)}.cover.sm{width:26px;height:38px;border-radius:4px;vertical-align:middle}
.cover-big{max-width:min(420px,80vw);max-height:70vh;border-radius:10px;display:block;margin:0 auto;box-shadow:0 20px 40px rgba(0,0,0,.3)}
/* ---------- data grid (Tabulator) */
.grid-wrap{overflow:hidden}
.tabulator{background:var(--card);border:0;color:var(--fg);font-size:13px;font-family:var(--font);font-variant-numeric:tabular-nums}
.tabulator .tabulator-header{background:var(--card-2);color:var(--muted);border-bottom:1px solid var(--line);font-weight:600;position:sticky;top:0;z-index:5}
.tabulator .tabulator-header .tabulator-col{background:var(--card-2);border-right:1px solid var(--line)}
.tabulator .tabulator-header .tabulator-col .tabulator-col-content{padding:8px 10px}
.tabulator .tabulator-header .tabulator-col .tabulator-col-title{font-size:12px;letter-spacing:.02em}
.tabulator .tabulator-header .tabulator-col.tabulator-sortable:hover{background:var(--hover)}
.tabulator .tabulator-header .tabulator-col.human{background:var(--human-h)}
.tabulator .tabulator-header-filter input,.tabulator .tabulator-header-filter select{padding:3px 7px!important;font-size:12px!important;border-radius:6px!important}
.tabulator .tabulator-tableholder{background:var(--card)}
.tabulator .tabulator-tableholder .tabulator-table{background:var(--card);color:var(--fg)}
.tabulator-row{background:var(--card);border-bottom:1px solid var(--line);min-height:36px;transition:background 80ms}
.tabulator-row.tabulator-row-even{background:var(--card)}
.tabulator-row .tabulator-cell{border-right:1px solid transparent;padding:8px 10px}
.tabulator-row.tabulator-selectable:hover,.tabulator-row:hover{background:var(--hover)!important}
.tabulator-row .tabulator-cell.human{background:var(--human)}
.tabulator .tabulator-cell.edited{box-shadow:inset 3px 0 0 var(--brand);background:var(--edited)}
.tabulator-row .tabulator-cell.tabulator-range-selected:not(.tabulator-range-only-cell-selected),.tabulator-row .tabulator-cell.tabulator-range-only-cell-selected{outline:2px solid var(--brand);outline-offset:-2px;background:var(--brand-soft)}
.tabulator .tabulator-range-overlay .tabulator-range.tabulator-range-active,.tabulator .tabulator-range-overlay .tabulator-range{border-color:var(--brand)}
.tabulator-row .tabulator-cell.tabulator-editing{border:1px solid var(--brand);background:var(--card)}
.tabulator-cell input,.tabulator-cell select,.tabulator-cell textarea{background:var(--card)!important;color:var(--fg)!important}
.tabulator .tabulator-footer{background:var(--card-2);border-top:1px solid var(--line);color:var(--muted);padding:6px 10px}
.tabulator .tabulator-footer .tabulator-page{background:var(--card);color:var(--fg-2);border:1px solid var(--line);border-radius:7px;padding:3px 9px;margin:0 2px}
.tabulator .tabulator-footer .tabulator-page.active{background:var(--brand);border-color:var(--brand);color:#fff}
.tabulator .tabulator-footer .tabulator-page:not(.disabled):hover{background:var(--hover);color:var(--fg)}
.tabulator .tabulator-footer .tabulator-page-size{background:var(--card);color:var(--fg);border:1px solid var(--line);border-radius:7px}
.tabulator .tabulator-placeholder span{color:var(--muted)!important}
.tabulator-edit-list,.tabulator-popup-container,.tabulator-menu{background:var(--card)!important;color:var(--fg)!important;border:1px solid var(--line)!important;border-radius:10px;box-shadow:0 12px 28px rgba(0,0,0,.18)}
.tabulator-edit-list .tabulator-edit-list-item{color:var(--fg)!important}.tabulator-edit-list .tabulator-edit-list-item:hover,.tabulator-edit-list .tabulator-edit-list-item.focused{background:var(--hover)!important;color:var(--fg)!important}
.tabulator-edit-list .tabulator-edit-list-item.active{background:var(--brand)!important;color:#fff!important}
.tabulator .tabulator-col-resize-handle:hover{background:var(--line-2)}
.tabulator .tabulator-header .tabulator-col .tabulator-col-content .tabulator-col-sorter .tabulator-arrow{border-bottom-color:var(--line-2)}
.tabulator .tabulator-header .tabulator-col[aria-sort=ascending] .tabulator-col-content .tabulator-col-sorter .tabulator-arrow{border-bottom-color:var(--brand)}
.tabulator .tabulator-header .tabulator-col[aria-sort=descending] .tabulator-col-content .tabulator-col-sorter .tabulator-arrow{border-top-color:var(--brand)}
/* dense mode (toggle in the top bar, saved per browser) */
html.dense .tabulator-row{min-height:26px}html.dense .tabulator-row .tabulator-cell{padding:3px 8px}
html.dense .tabulator .tabulator-header .tabulator-col .tabulator-col-content{padding:5px 8px}html.dense .tabulator{font-size:12.5px}
html.dense .card{padding:8px 12px;margin-bottom:6px}
/* ---------- inline-styled SVG charts (Business page) */
html[data-theme=dark] svg[viewBox]{background:var(--card)!important;border-color:var(--line)!important}
html[data-theme=dark] svg text{fill:var(--muted)}
/* ---------- login */
.login-body{background:var(--bg)}.login-card{padding:32px;gap:12px}.login-card h1{font-size:20px;letter-spacing:-.01em}
.theme-toggle,.dense-toggle{display:inline-flex;align-items:center;gap:6px}
.theme-toggle.floating{position:fixed;top:14px;right:14px}
.brand .logo{background:var(--brand);color:var(--brand-fg)}
html[data-theme=dark] .top{background:color-mix(in srgb,var(--bg) 88%,transparent)}
html[data-theme=dark] .kpi{background:linear-gradient(180deg,#16171c,#121317)}
.tabulator .tabulator-header .tabulator-col .tabulator-col-title{text-transform:uppercase;font-size:11px;letter-spacing:.06em}
.chip.c-grade-A{background:var(--ok-soft);color:var(--ok)}.chip.c-grade-B{background:var(--brand-soft);color:var(--brand-text)}.chip.c-grade-C{background:var(--c-info-bg);color:var(--c-info-fg)}.chip.c-grade-D{background:var(--warn-soft);color:var(--warn)}.chip.c-grade-F{background:var(--bad-soft);color:var(--bad)}
/* thin demand + grade pending + KPI sparkline (2026-10-26) */
.chip.c-thin{background:var(--c-info-bg);color:var(--c-info-fg)}
.chip.c-pending{background:transparent;color:var(--muted, #94a3b8);border:1px dashed currentColor;font-weight:500}
.spark{vertical-align:middle;color:var(--brand-text);opacity:.9;margin-left:4px}