/* Cascade — shared design system + app shell.
   Loaded by every page; page-specific CSS stays inline in each page.
   Brand-neutral: product name lives in SITE.brand (assets/shell.js). */

:root{
  --bg:#0e1417; --panel:#141d21; --panel-2:#19242a; --sidebar:#10171b; --line:#26333a;
  --ink:#d6dfe3; --ink-dim:#8b9aa1; --ink-faint:#5f6f77;
  --accent:#ff6f5b; --accent-dim:#c0503f; --accent-soft:rgba(255,111,91,.14);
  --good:#45c2b1; --warn:#e0a862;
  --frontier:#45c2b1; --flagship:#e0a862; --grid:rgba(120,150,160,.12);
  --shadow:0 1px 0 rgba(255,255,255,.03), 0 18px 40px -24px rgba(0,0,0,.7);
  --mono:ui-monospace,"SFMono-Regular","Cascadia Mono","Roboto Mono","DejaVu Sans Mono",monospace;
  --sans:"Segoe UI",-apple-system,system-ui,"Helvetica Neue",Arial,sans-serif;
  --sb-w:264px; --col:768px;
}
@media (prefers-color-scheme: light){
  :root{
    --bg:#f4f6f7; --panel:#ffffff; --panel-2:#f5f8f8; --sidebar:#eef1f2; --line:#d6dedf;
    --ink:#17242b; --ink-dim:#51646c; --ink-faint:#829099;
    --accent:#df4f3b; --accent-dim:#b23d2c; --accent-soft:rgba(223,79,59,.10);
    --good:#1a9c8c; --warn:#b3781f;
    --frontier:#1a9c8c; --flagship:#b3781f; --grid:rgba(40,70,80,.10);
    --shadow:0 1px 0 rgba(255,255,255,.6), 0 16px 34px -26px rgba(20,40,45,.4);
  }
}
:root[data-theme="dark"]{
  --bg:#0e1417; --panel:#141d21; --panel-2:#19242a; --sidebar:#10171b; --line:#26333a;
  --ink:#d6dfe3; --ink-dim:#8b9aa1; --ink-faint:#5f6f77;
  --accent:#ff6f5b; --accent-dim:#c0503f; --accent-soft:rgba(255,111,91,.14);
  --good:#45c2b1; --warn:#e0a862;
  --frontier:#45c2b1; --flagship:#e0a862; --grid:rgba(120,150,160,.12);
  --shadow:0 1px 0 rgba(255,255,255,.03), 0 18px 40px -24px rgba(0,0,0,.7);
}
:root[data-theme="light"]{
  --bg:#f4f6f7; --panel:#ffffff; --panel-2:#f5f8f8; --sidebar:#eef1f2; --line:#d6dedf;
  --ink:#17242b; --ink-dim:#51646c; --ink-faint:#829099;
  --accent:#df4f3b; --accent-dim:#b23d2c; --accent-soft:rgba(223,79,59,.10);
  --good:#1a9c8c; --warn:#b3781f;
  --frontier:#1a9c8c; --flagship:#b3781f; --grid:rgba(40,70,80,.10);
  --shadow:0 1px 0 rgba(255,255,255,.6), 0 16px 34px -26px rgba(20,40,45,.4);
}

*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);
     -webkit-font-smoothing:antialiased;line-height:1.5}
a{color:inherit}
button{font-family:inherit}
::selection{background:var(--accent-soft)}

/* ============================ app shell ============================ */
body.app{display:grid;grid-template-columns:var(--sb-w) 1fr;height:100vh;overflow:hidden}
body.app.sb-collapsed{grid-template-columns:0 1fr}

.sidebar{background:var(--sidebar);border-right:1px solid var(--line);
         display:flex;flex-direction:column;min-width:0;overflow:hidden}
.sb-top{display:flex;align-items:center;gap:10px;padding:14px 14px 10px}
.sb-brand{display:flex;align-items:center;gap:9px;font-weight:800;letter-spacing:-.01em;
          font-size:16px;color:var(--ink);text-decoration:none;min-width:0}
.sb-brand .dot{width:9px;height:9px;border-radius:50%;background:var(--accent);flex:none;
               box-shadow:0 0 0 4px var(--accent-soft)}
.sb-brand small{font-family:var(--mono);font-weight:400;font-size:10px;color:var(--ink-faint);
                letter-spacing:.14em;text-transform:uppercase;display:block;margin-top:1px}
.iconbtn{background:none;border:1px solid transparent;color:var(--ink-dim);border-radius:8px;
         width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;
         cursor:pointer;transition:.15s;flex:none}
.iconbtn:hover{background:var(--panel-2);color:var(--ink);border-color:var(--line)}
.iconbtn svg{width:18px;height:18px}

.sb-new{margin:6px 12px 8px;display:flex;align-items:center;gap:9px;padding:10px 12px;
        background:var(--panel);border:1px solid var(--line);border-radius:10px;color:var(--ink);
        font-size:13.5px;font-weight:600;cursor:pointer;text-decoration:none;transition:.15s}
.sb-new:hover{border-color:var(--accent);color:var(--accent)}
.sb-new svg{width:16px;height:16px}

.sb-nav{display:flex;flex-direction:column;gap:2px;padding:6px 8px}
.sb-nav a{display:flex;align-items:center;gap:11px;padding:9px 11px;border-radius:9px;
          color:var(--ink-dim);text-decoration:none;font-size:13.5px;transition:.12s}
.sb-nav a:hover{background:var(--panel-2);color:var(--ink)}
.sb-nav a.active{background:var(--accent-soft);color:var(--ink);font-weight:600}
.sb-nav a svg{width:17px;height:17px;flex:none;opacity:.85}

.sb-section{font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;
            color:var(--ink-faint);padding:14px 20px 6px}
.sb-scroll{flex:1;overflow-y:auto;min-height:0}
.sb-hist{display:flex;flex-direction:column;gap:1px;padding:0 8px}
.hist-item{display:flex;align-items:center;gap:8px;padding:8px 11px;border-radius:8px;
           color:var(--ink-dim);font-size:13px;cursor:pointer;transition:.12s;
           white-space:nowrap;overflow:hidden}
.hist-item:hover{background:var(--panel-2);color:var(--ink)}
.hist-item.active{background:var(--panel-2);color:var(--ink)}
.hist-item .ht{flex:1;overflow:hidden;text-overflow:ellipsis}
.hist-item .hx{opacity:0;color:var(--ink-faint);font-size:15px;line-height:1;transition:.12s}
.hist-item:hover .hx{opacity:.7}
.hist-item .hx:hover{color:var(--warn);opacity:1}
.sb-empty{color:var(--ink-faint);font-size:12px;padding:6px 20px;font-style:italic}

.sb-foot{border-top:1px solid var(--line);padding:10px 12px;display:flex;align-items:center;
         gap:8px;font-family:var(--mono);font-size:11px;color:var(--ink-faint)}
.sb-foot a{color:var(--ink-dim);text-decoration:none}
.sb-foot a:hover{color:var(--accent)}
.sb-foot .spacer{flex:1}

/* ============================ main pane ============================ */
.main{display:flex;flex-direction:column;height:100vh;min-width:0;overflow:hidden}
.topbar{height:52px;flex:none;display:flex;align-items:center;gap:12px;
        padding:0 clamp(12px,3vw,22px);border-bottom:1px solid var(--line);background:var(--bg)}
.topbar .tb-title{font-weight:700;font-size:15px;letter-spacing:-.01em}
.topbar .spacer{flex:1}
.tb-menu{display:none}
#budget{font-family:var(--mono);font-size:11.5px;color:var(--ink-faint)}
#budget b{color:var(--good);font-weight:600}
#budget.out b{color:var(--warn)}

.scrollpane{flex:1;overflow-y:auto;min-width:0}

/* backdrop for mobile drawer */
.sb-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.5);opacity:0;pointer-events:none;
             transition:.2s;z-index:40}

/* ============================ shared bits ============================ */
.btn{background:var(--accent);color:#fff;border:0;border-radius:11px;padding:10px 18px;
     font-weight:700;font-size:14px;cursor:pointer;transition:.15s}
.btn:hover{background:var(--accent-dim)}
.btn:disabled{opacity:.45;cursor:default}
.btn.ghost{background:var(--panel-2);color:var(--ink-dim);border:1px solid var(--line);font-weight:600}
.btn.ghost:hover{color:var(--ink);border-color:var(--accent)}

.seg{display:inline-flex;background:var(--panel-2);border:1px solid var(--line);border-radius:10px;padding:3px}
.seg button{font-family:var(--mono);font-size:12px;color:var(--ink-dim);background:none;border:0;
            padding:6px 12px;border-radius:7px;cursor:pointer;transition:.15s}
.seg button[aria-pressed="true"]{background:var(--accent);color:#fff;font-weight:600}

/* ============================ mobile ============================ */
@media (max-width:820px){
  body.app{grid-template-columns:1fr}
  .sidebar{position:fixed;inset:0 auto 0 0;width:var(--sb-w);z-index:50;
           transform:translateX(-100%);transition:transform .22s ease}
  body.app.sb-open .sidebar{transform:none}
  body.app.sb-open .sb-backdrop{opacity:1;pointer-events:auto}
  .tb-menu{display:inline-flex}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}