/* ==========================================================================
   Technical CSE Training — dark dashboard theme
   Deep indigo shell, pastel gradient tiles, soft rounded panels.
   ========================================================================== */

:root{
  --bg:#F3F5FB;
  --shell:#FFFFFF;
  --sidebar:#FFFFFF;
  --panel:#FFFFFF;
  --panel-2:#EDF0F9;
  --line:#E3E7F3;
  --line-2:#CFD5E8;

  --txt:#1A1E33;
  --txt-2:#575D78;
  --txt-3:#868DA6;

  --accent:#5566F5;
  --accent-soft:rgba(85,102,245,.09);
  --good:#0E9E6F;
  --good-soft:rgba(14,158,111,.11);
  --warn:#B57611;
  --warn-soft:rgba(181,118,17,.12);
  --bad:#D2445C;
  --bad-soft:rgba(210,68,92,.10);

  --field-bg:#FFFFFF;
  --th-bg:#F7F8FD;
  --track:#E7EAF5;
  --hover:rgba(85,102,245,.05);
  --scroll:#C7CDE2;
  --overlay:rgba(26,30,51,.42);

  --box-border:#B4BAD1;
  --box-fill:linear-gradient(140deg,#A78BFA,#7C5CF0);
  --box-tick:#FFFFFF;

  --chart-line:#E08A2E;
  --chart-grid:rgba(26,30,51,.09);
  --chart-dot:#FFFFFF;
  --chart-text:#868DA6;
  --chart-track:rgba(26,30,51,.07);
  --chart-centre:#1A1E33;

  --amber-a:#FBD38D; --amber-b:#F1A153;
  --mint-a:#9DECD3;  --mint-b:#40C79F;
  --violet-a:#BFA6FD; --violet-b:#7C5CF0;
  --pink-a:#FBB6DA;  --pink-b:#EE60A8;
  --sky-a:#A5DEFC;   --sky-b:#2FB3EE;
  --on-tile:#1A1136;

  --r-lg:20px;
  --r-md:14px;
  --r-sm:9px;
  --shadow:0 10px 34px rgba(26,30,51,.09);
  --page-grad:radial-gradient(900px 500px at 92% -14%,rgba(124,92,240,.10),transparent 62%),
              radial-gradient(700px 460px at -8% 106%,rgba(47,179,238,.09),transparent 62%);
}

html[data-theme="dark"]{
  --bg:#120C26;
  --shell:#1B1136;
  --sidebar:#150E2B;
  --panel:#241A4A;
  --panel-2:#2C2158;
  --line:rgba(255,255,255,.07);
  --line-2:rgba(255,255,255,.14);

  --txt:#EFEBFA;
  --txt-2:#A79FC8;
  --txt-3:#7A719C;

  --accent:#7C8CFF;
  --accent-soft:rgba(124,140,255,.10);
  --good:#34D399;
  --good-soft:rgba(52,211,153,.14);
  --warn:#FBBF24;
  --warn-soft:rgba(251,191,36,.14);
  --bad:#FB7185;
  --bad-soft:rgba(251,113,133,.12);

  --field-bg:#170F31;
  --th-bg:rgba(255,255,255,.03);
  --track:#170F31;
  --hover:rgba(255,255,255,.04);
  --scroll:#3A2C6B;
  --overlay:rgba(10,6,22,.62);

  --box-border:#5E5581;
  --box-fill:linear-gradient(140deg,#9DECD3,#4FD1AE);
  --box-tick:#16112B;

  --chart-line:#F6AD55;
  --chart-grid:rgba(255,255,255,.07);
  --chart-dot:#241A4A;
  --chart-text:#7A719C;
  --chart-track:rgba(255,255,255,.06);
  --chart-centre:#EFEBFA;

  --amber-b:#F6AD55; --mint-b:#4FD1AE; --violet-b:#8B6EF5; --pink-b:#F472B6; --sky-b:#3FBDF7;

  --shadow:0 18px 40px rgba(0,0,0,.35);
  --page-grad:radial-gradient(1100px 600px at 88% -12%,rgba(139,110,245,.22),transparent 60%),
              radial-gradient(800px 500px at -8% 108%,rgba(63,189,247,.14),transparent 60%);
}

/* The browser's own [hidden] rule loses to any class that sets `display`,
   which is why .shell / .auth stayed visible. Make [hidden] authoritative. */
[hidden]{display:none!important}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--page-grad),var(--bg);
  color:var(--txt);
  font-family:'Plus Jakarta Sans',system-ui,-apple-system,sans-serif;
  font-size:14px;line-height:1.5;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
h1,h2,h3,h4,.display{font-family:'Outfit',sans-serif;font-weight:600;letter-spacing:-.01em;margin:0}
a{color:var(--accent);text-decoration:none}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:var(--scroll);border-radius:20px;border:3px solid transparent;background-clip:content-box}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* ---------------- auth screens ---------------- */
.auth{min-height:100vh;display:grid;place-items:center;padding:24px}
.auth-card{
  width:100%;max-width:420px;background:var(--shell);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:30px 28px;box-shadow:var(--shadow);
}
.auth-card .brand{display:flex;align-items:center;gap:11px;margin-bottom:22px}
.logo{
  width:38px;height:38px;border-radius:12px;flex:0 0 auto;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--violet-a),var(--violet-b));
  font-family:'Outfit',sans-serif;font-weight:700;color:#fff;font-size:15px;
}
.brand b{font-family:'Outfit',sans-serif;font-size:15px;display:block;line-height:1.15}
.brand span{font-size:11px;color:var(--txt-3);letter-spacing:.05em;text-transform:uppercase}
.auth h1{font-size:23px;margin-bottom:5px}
.auth .lede{color:var(--txt-2);font-size:13px;margin:0 0 20px}
.tabs{display:flex;gap:6px;background:var(--panel-2);border:1px solid var(--line);padding:4px;border-radius:12px;margin-bottom:20px}
.tabs button{
  flex:1;background:none;border:0;color:var(--txt-2);font:inherit;font-size:12.5px;font-weight:600;
  padding:9px;border-radius:9px;cursor:pointer;
}
.tabs button[aria-selected=true]{background:var(--shell);color:var(--txt);box-shadow:0 1px 4px rgba(26,30,51,.10)}

.field{margin-bottom:14px}
.field label{display:block;font-size:12px;font-weight:600;color:var(--txt-2);margin-bottom:5px}
.field .hint{font-size:11px;color:var(--txt-3);margin:5px 0 0;line-height:1.4}
input,select,textarea{
  width:100%;background:var(--field-bg);border:1px solid var(--line-2);color:var(--txt);
  border-radius:var(--r-sm);padding:10px 12px;font:inherit;font-size:13.5px;
}
input::placeholder{color:var(--txt-3);opacity:.75}
input:focus,select:focus{border-color:var(--accent);outline:none}
select option{background:var(--shell);color:var(--txt)}
.row2{display:flex;gap:10px}
.row2>*{flex:1;min-width:0}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  background:linear-gradient(135deg,var(--violet-a),var(--violet-b));color:#fff;
  border:0;border-radius:var(--r-sm);padding:11px 16px;font:inherit;font-weight:700;font-size:13.5px;
  cursor:pointer;width:100%;
}
.btn:hover{filter:brightness(1.06)}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn.ghost{background:none;color:var(--txt-2);border:1px solid var(--line-2);font-weight:600}
.btn.ghost:hover{color:var(--txt);border-color:var(--accent)}
.btn.sm{width:auto;padding:7px 12px;font-size:12px}
.btn.danger{background:none;border:1px solid var(--bad);color:var(--bad)}
.msg{font-size:12.5px;border-radius:var(--r-sm);padding:9px 11px;margin-bottom:14px;display:none}
.msg.show{display:block}
.msg.err{background:var(--bad-soft);color:var(--bad);border:1px solid var(--bad)}
.msg.ok{background:var(--good-soft);color:var(--good);border:1px solid var(--good)}
.auth-foot{margin-top:18px;padding-top:14px;border-top:1px solid var(--line);font-size:12px;color:var(--txt-3);text-align:center}

/* ---------------- app shell ---------------- */
.shell{display:grid;grid-template-columns:216px 1fr;min-height:100vh;max-width:1480px;margin:0 auto;background:var(--shell)}
.side{background:var(--sidebar);border-right:1px solid var(--line);padding:22px 0;display:flex;flex-direction:column}
.side .who{display:flex;align-items:center;gap:11px;padding:0 20px 22px}
.av{
  width:40px;height:40px;border-radius:50%;flex:0 0 auto;display:grid;place-items:center;
  font-family:'Outfit',sans-serif;font-weight:700;font-size:14px;color:var(--on-tile);
  background:linear-gradient(140deg,var(--mint-a),var(--mint-b));
}
.av.v{background:linear-gradient(140deg,var(--violet-a),var(--violet-b))}
.av.p{background:linear-gradient(140deg,var(--pink-a),var(--pink-b))}
.av.a{background:linear-gradient(140deg,var(--amber-a),var(--amber-b))}
.av.s{background:linear-gradient(140deg,var(--sky-a),var(--sky-b))}
.av.sm{width:31px;height:31px;font-size:11.5px}
.who b{font-family:'Outfit',sans-serif;font-size:13.5px;display:block;line-height:1.2}
.who span{font-size:10px;color:var(--txt-3);letter-spacing:.1em;text-transform:uppercase}
.nav{display:flex;flex-direction:column;gap:2px;flex:1}
.nav a{
  display:flex;align-items:center;gap:12px;padding:11px 20px;color:var(--txt-2);
  font-size:13.5px;font-weight:500;border-left:3px solid transparent;cursor:pointer;
}
.nav a:hover{color:var(--txt);background:var(--hover)}
.nav a.on{color:var(--accent);background:var(--accent-soft);border-left-color:var(--accent);font-weight:600}
.nav a svg{width:17px;height:17px;flex:0 0 auto;stroke:currentColor;fill:none;stroke-width:1.7}
.nav .sep{height:1px;background:var(--line);margin:12px 20px}

.main{padding:24px 28px 60px;min-width:0}
.top{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:22px}
.top h1{font-size:27px}
.top .sub{color:var(--txt-3);font-size:11.5px;letter-spacing:.09em;text-transform:uppercase;margin-top:3px}
.people{display:flex;gap:14px;align-items:flex-start}
.person{text-align:center;width:52px}
.person span{display:block;font-size:10px;color:var(--txt-3);margin-top:5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.eyebrow{font-size:12.5px;color:var(--txt-2);font-weight:600;margin:0 0 11px}

/* ---------------- phase tiles ---------------- */
.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin-bottom:22px}
.tile{
  border-radius:var(--r-md);padding:15px 14px 13px;min-height:132px;color:var(--on-tile);
  display:flex;flex-direction:column;justify-content:space-between;cursor:pointer;
  border:0;font:inherit;text-align:left;transition:transform .18s ease,box-shadow .18s ease;
}
.tile:hover{transform:translateY(-3px);box-shadow:0 12px 24px rgba(26,30,51,.18)}
.tile.amber{background:linear-gradient(160deg,var(--amber-a),var(--amber-b))}
.tile.mint{background:linear-gradient(160deg,var(--mint-a),var(--mint-b))}
.tile.violet{background:linear-gradient(160deg,var(--violet-a),var(--violet-b))}
.tile.pink{background:linear-gradient(160deg,var(--pink-a),var(--pink-b))}
.tile.sky{background:linear-gradient(160deg,var(--sky-a),var(--sky-b))}
.tile .ic{width:30px;height:30px;stroke:var(--on-tile);fill:none;stroke-width:1.6;opacity:.85}
.tile b{font-family:'Outfit',sans-serif;font-size:14px;display:block;line-height:1.2}
.tile em{font-style:normal;font-size:10.5px;opacity:.72;display:block;margin-top:2px}
.tile .meter{height:5px;background:rgba(26,17,54,.2);border-radius:20px;margin-top:9px;overflow:hidden}
.tile .meter i{display:block;height:100%;background:var(--on-tile);border-radius:20px;opacity:.75}
.tile .pc{font-family:'Outfit',sans-serif;font-weight:700;font-size:11.5px;margin-top:6px;display:block}

/* ---------------- panels ---------------- */
.grid2{display:grid;grid-template-columns:1.55fr 1fr;gap:16px;margin-bottom:22px}
@media (max-width:900px){.grid2{grid-template-columns:1fr}}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--r-md);padding:16px 18px}
.panel h3{font-size:14px;margin-bottom:2px}
.panel .cap{font-size:11.5px;color:var(--txt-3)}
.panel-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:12px}
.chip{
  font-size:10.5px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;
  padding:4px 9px;border-radius:20px;background:var(--panel-2);color:var(--txt-2);white-space:nowrap;
}
.chip.good{background:var(--good-soft);color:var(--good)}
.chip.warn{background:var(--warn-soft);color:var(--warn)}
.chip.bad{background:var(--bad-soft);color:var(--bad)}
.center-num{text-align:center;margin-top:6px}
.center-num b{font-family:'Outfit',sans-serif;font-size:15px;display:block}
.center-num span{font-size:11px;color:var(--txt-3)}

/* ---------------- tables ---------------- */
.sect{margin-top:20px}
.sect-head{display:flex;align-items:baseline;gap:9px;margin-bottom:8px;flex-wrap:wrap}
.sect-head .k{font-size:11.5px;color:var(--txt-3);font-weight:700}
.sect-head h4{font-size:13.5px}
.sect-head .cnt{margin-left:auto;font-size:11px;color:var(--txt-3)}
.note{font-size:12.5px;color:var(--txt-2);margin:0 0 9px}
.flow{
  font-size:11.5px;color:var(--accent);background:var(--accent-soft);border-left:2px solid var(--accent);
  padding:8px 11px;border-radius:0 var(--r-sm) var(--r-sm) 0;margin:0 0 11px;overflow-x:auto;white-space:nowrap;
}
.tbl-wrap{background:var(--panel);border:1px solid var(--line);border-radius:var(--r-md);overflow-x:auto;-webkit-overflow-scrolling:touch}
table{min-width:100%}
table{width:100%;border-collapse:collapse}
th{
  text-align:left;font-size:10px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;
  color:var(--txt-3);padding:10px 12px;background:var(--th-bg);border-bottom:1px solid var(--line);
}
th.c,td.c{text-align:center}
td{padding:7px 12px;border-bottom:1px solid var(--line);font-size:13px;vertical-align:middle}
tr:last-child td{border-bottom:0}
tr.done td.lbl{color:var(--txt-3)}
td.no{width:40px;text-align:right;color:var(--txt-3);font-size:11.5px;padding-right:4px}
td.mini{width:110px}
td.tiny{width:78px}
td.mini input,td.tiny input,td.c select{padding:6px 8px;font-size:12px}
.box{
  -webkit-appearance:none;appearance:none;width:19px;height:19px;border:1.6px solid var(--box-border);
  border-radius:6px;background:var(--field-bg);cursor:pointer;position:relative;vertical-align:middle;
}
.box:hover{border-color:var(--accent)}
.box:checked{background:var(--box-fill);border-color:transparent}
.box:checked::after{
  content:"";position:absolute;left:5px;top:2px;width:5px;height:10px;
  border-right:2px solid var(--box-tick);border-bottom:2px solid var(--box-tick);transform:rotate(40deg);
}

/* ---------------- toolbar ---------------- */
.bar{display:flex;gap:9px;align-items:center;flex-wrap:wrap;margin-bottom:16px}
.bar input[type=search]{max-width:260px}
.seg{display:flex;background:var(--panel-2);border:1px solid var(--line-2);border-radius:var(--r-sm);overflow:hidden}
.seg button{
  background:none;border:0;color:var(--txt-2);font:inherit;font-size:11.5px;font-weight:600;
  padding:8px 13px;cursor:pointer;border-right:1px solid var(--line);
}
.seg button:last-child{border-right:0}
.seg button[aria-pressed=true]{background:var(--accent);color:#fff}
.saved{margin-left:auto;font-size:11px;color:var(--txt-3)}

/* ---------------- cards / signoff ---------------- */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:14px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r-md);padding:16px 17px}
.card h4{font-size:10.5px;letter-spacing:.11em;text-transform:uppercase;color:var(--txt-3);margin-bottom:12px}
.decl{font-size:12.5px;color:var(--txt-2);border-left:2px solid var(--line-2);padding-left:11px;margin:0 0 13px}
.lock{border-radius:var(--r-md);padding:13px 15px;margin-top:16px;font-size:12.5px;border:1px solid var(--bad);background:var(--bad-soft);color:var(--bad)}
.lock.ok{border-color:var(--good);background:var(--good-soft);color:var(--good)}
.lock b{display:block;font-family:'Outfit',sans-serif;font-size:14px;margin-bottom:5px}
.lock ul{margin:6px 0 0;padding-left:17px}
.legend{background:var(--panel);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:0 var(--r-md) var(--r-md) 0;padding:14px 16px;margin-bottom:18px}
.legend h4{font-size:10.5px;letter-spacing:.11em;text-transform:uppercase;color:var(--txt-3);margin-bottom:9px}
.legend dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:6px 14px;font-size:12.5px}
.legend dt{font-weight:700;white-space:nowrap;color:var(--txt)}
.legend dd{margin:0;color:var(--txt-2)}
@media (max-width:600px){.legend dl{grid-template-columns:1fr;gap:1px}.legend dd{margin-bottom:8px}}

/* ---------------- admin extras ---------------- */
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin-bottom:22px}
.kpi{background:var(--panel);border:1px solid var(--line);border-radius:var(--r-md);padding:15px 16px}
.kpi span{font-size:11px;color:var(--txt-3);letter-spacing:.06em;text-transform:uppercase}
.kpi b{font-family:'Outfit',sans-serif;font-size:28px;display:block;margin-top:5px;line-height:1}
.kpi i{font-style:normal;font-size:11.5px;color:var(--txt-3)}
tr.clickable{cursor:pointer}
tr.clickable:hover{background:var(--hover)}
.meter-row{display:flex;align-items:center;gap:9px;min-width:150px}
.meter-row .track{flex:1;height:6px;background:var(--track);border-radius:20px;overflow:hidden}
.meter-row .track i{display:block;height:100%;border-radius:20px;background:linear-gradient(90deg,var(--violet-b),var(--mint-b))}
.meter-row b{font-size:11.5px;width:36px;text-align:right;font-family:'Outfit',sans-serif}

.drawer-bg{position:fixed;inset:0;background:var(--overlay);backdrop-filter:blur(3px);z-index:40;display:none}
.drawer-bg.open{display:block}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(720px,100%);background:var(--shell);
  border-left:1px solid var(--line-2);z-index:50;overflow-y:auto;padding:22px 24px 60px;box-shadow:var(--shadow);
  transform:translateX(100%);transition:transform .25s ease;
}
.drawer.open{transform:none}
.drawer-head{display:flex;justify-content:space-between;align-items:flex-start;gap:14px;margin-bottom:18px}
.x{background:none;border:1px solid var(--line-2);color:var(--txt-2);border-radius:9px;width:32px;height:32px;cursor:pointer;font-size:16px;line-height:1}
.mini-bars{display:flex;flex-direction:column;gap:9px}
.mini-bar{display:flex;align-items:center;gap:10px;font-size:12.5px}
.mini-bar .nm{width:150px;color:var(--txt-2);flex:0 0 auto;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mini-bar .track{flex:1;height:6px;background:var(--track);border-radius:20px;overflow:hidden}
.mini-bar .track i{display:block;height:100%;border-radius:20px;background:linear-gradient(90deg,var(--violet-b),var(--mint-b))}

/* theme switch in the sidebar */
.theme-btn{
  display:flex;align-items:center;gap:12px;padding:11px 20px;color:var(--txt-2);
  font:inherit;font-size:13.5px;font-weight:500;background:none;border:0;
  border-left:3px solid transparent;cursor:pointer;width:100%;text-align:left;
}
.theme-btn:hover{color:var(--txt);background:var(--hover)}
.theme-btn svg{width:17px;height:17px;stroke:currentColor;fill:none;stroke-width:1.7}
.trail{list-style:none;margin:0;padding:0;font-size:12.5px}
.trail li{display:flex;gap:10px;padding:7px 0;border-bottom:1px solid var(--line);color:var(--txt-2)}
.trail li:last-child{border-bottom:0}
.trail time{color:var(--txt-3);flex:0 0 auto;width:118px;font-size:11.5px}
.pill{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;padding:2px 7px;border-radius:20px;background:var(--panel-2);color:var(--txt-2)}
.empty{text-align:center;padding:44px 20px;color:var(--txt-3)}
.empty b{display:block;font-family:'Outfit',sans-serif;font-size:16px;color:var(--txt-2);margin-bottom:6px}

.view{display:none}
.view.on{display:block}

@media (max-width:840px){
  .shell{grid-template-columns:1fr}
  .side{flex-direction:row;align-items:center;overflow-x:auto;padding:12px 0;border-right:0;border-bottom:1px solid var(--line)}
  .side .who{padding:0 14px 0 18px}
  .nav{flex-direction:row;gap:0}
  .nav a{border-left:0;border-bottom:3px solid transparent;padding:9px 14px;white-space:nowrap}
  .nav a.on{border-left:0;border-bottom-color:var(--accent)}
  .nav .sep{display:none}
  .theme-btn{width:auto;border-left:0;padding:9px 14px;white-space:nowrap}
  .main{padding:18px 16px 60px}
  td.mini{width:80px}td.tiny{width:66px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}
@media print{
  .side,.bar,.seg,.btn,.theme-btn,.people{display:none!important}
  body,.shell{background:#fff}
  .view{display:block!important}
}