/* STEM Todo - minimal UI + CSS-only logo */

:root{
  --bg: #0b1020;
  --panel: #101a33;
  --panel-2:#0f1730;
  --text:#e9eefc;
  --muted:#a9b3d6;
  --border: rgba(233,238,252,.10);
  --accent:#56d6a6;
  --accent-2:#4aa3ff;
  --danger:#ff5b6e;
  --warning:#ffd166;
  --shadow: 0 12px 30px rgba(0,0,0,.35);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background: radial-gradient(1200px 700px at 20% 0%, rgba(74,163,255,.15), transparent 60%),
              radial-gradient(900px 600px at 90% 10%, rgba(86,214,166,.16), transparent 65%),
              var(--bg);
  color:var(--text);
}

a{color:inherit}

.container{max-width:920px; margin:0 auto; padding:24px}

.topbar{
  position:sticky; top:0; z-index:5;
  background: linear-gradient(to bottom, rgba(11,16,32,.85), rgba(11,16,32,.55));
  backdrop-filter: blur(10px);
  border-bottom:1px solid var(--border);
}

.topbar .brand, .topbar .nav{
  max-width:920px;
  margin:0 auto;
}

.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px 24px;
}

.brand__link{
  display:flex;
  gap:12px;
  align-items:center;
  text-decoration:none;
}

.brand__name{font-weight:800; letter-spacing:.2px}
.brand__tag{font-size:12px; color:var(--muted)}

.nav{display:flex; gap:10px}
.nav__link{
  text-decoration:none;
  padding:8px 12px;
  border:1px solid transparent;
  border-radius:10px;
  color:var(--muted);
}
.nav__link:hover{border-color:var(--border); color:var(--text); background:rgba(255,255,255,.03)}

/* CSS-only logo - Notebook with pen */
.logo{
  width:48px; 
  height:48px;
  border-radius:6px;
  background: linear-gradient(180deg, #ffffff 0%, #f5f5f5 100%);
  border: 1px solid rgba(0,0,0,.15);
  border-left: 5px solid #56d6a6;
  box-shadow: 0 4px 12px rgba(0,0,0,.25), inset -1px 0 3px rgba(86,214,166,.2);
  position:relative;
  overflow:visible;
  padding: 4px;
}

/* Red margin line (like real notebook) */
.logo::before{
  content:"";
  position:absolute;
  left: 12px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: rgba(255,91,110,.25);
  z-index: 1;
}

/* Notebook ruled lines */
.logo::after{
  content:"";
  position:absolute;
  top: 8px;
  left: 15px;
  right: 6px;
  height: 32px;
  background: repeating-linear-gradient(
    to bottom,
    transparent,
    transparent 5px,
    rgba(74,163,255,.12) 5px,
    rgba(74,163,255,.12) 6px
  );
  z-index: 1;
}

/* Pen body */
.logo__stem{
  position:absolute;
  right: -2px;
  top: 6px;
  width: 22px;
  height: 4px;
  background: linear-gradient(90deg, #4aa3ff 0%, #2d7ac7 100%);
  border-radius: 2px 0 0 2px;
  transform: rotate(-40deg);
  box-shadow: 0 2px 6px rgba(0,0,0,.3);
  z-index: 3;
}

/* Pen tip */
.logo__stem::before{
  content:"";
  position:absolute;
  right: -4px;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-left: 5px solid #2d7ac7;
  border-top: 3px solid transparent;
  border-bottom: 3px solid transparent;
}

/* Pen clip */
.logo__stem::after{
  content:"";
  position:absolute;
  left: 3px;
  top: -2px;
  width: 2px;
  height: 8px;
  background: rgba(255,255,255,.4);
  border-radius: 1px;
}

.card{
  background: linear-gradient(180deg, rgba(16,26,51,.92), rgba(15,23,48,.92));
  border:1px solid var(--border);
  border-radius:16px;
  box-shadow: var(--shadow);
}
.card__header{
  padding:16px 18px;
  border-bottom:1px solid var(--border);
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
}
.card__body{padding:16px 18px}

.h1{font-size:18px; margin:0}
.muted{color:var(--muted)}

.flash{
  margin: 0 0 14px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
}
.flash--success{border-color: rgba(86,214,166,.35)}
.flash--error{border-color: rgba(255,91,110,.45)}

.form{
  display:flex;
  gap:10px;
  align-items:center;
}

.input{
  width:100%;
  padding: 12px 12px;
  border-radius: 12px;
  border:1px solid var(--border);
  background: rgba(255,255,255,.03);
  color: var(--text);
  outline:none;
  font-family: inherit;
  font-size: 14px;
}
.input:focus{border-color: rgba(74,163,255,.55); box-shadow: 0 0 0 4px rgba(74,163,255,.12)}
textarea.input{resize:vertical; min-height:100px}

/* Select/Dropdown specific styles */
select.input {
  background: rgba(255,255,255,.95);
  color: #000;
  cursor: pointer;
}
select.input:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
select.input:focus {
  background: rgba(255,255,255,.95);
  color: #000;
}
select.input option {
  background: #fff;
  color: #000;
  padding: 8px;
}
select.input option:hover {
  background: var(--accent);
  color: #fff;
}

.btn{
  border:1px solid var(--border);
  background: rgba(255,255,255,.04);
  color:var(--text);
  padding: 11px 14px;
  border-radius: 12px;
  cursor:pointer;
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  gap:8px;
  white-space:nowrap;
}
.btn:hover{background: rgba(255,255,255,.07)}
.btn--primary{border-color: rgba(86,214,166,.35); background: rgba(86,214,166,.12)}
.btn--primary:hover{background: rgba(86,214,166,.18)}
.btn--danger{border-color: rgba(255,91,110,.35); background: rgba(255,91,110,.10)}
.btn--danger:hover{background: rgba(255,91,110,.14)}

.table{width:100%; border-collapse:separate; border-spacing:0 10px}
.row{
  background: rgba(255,255,255,.03);
  border:1px solid var(--border);
  border-radius: 14px;
}
.table td{padding:12px 12px; vertical-align:middle}
.table tr td:first-child{border-top-left-radius:14px;border-bottom-left-radius:14px}
.table tr td:last-child{border-top-right-radius:14px;border-bottom-right-radius:14px}

.task{
  display:flex;
  align-items:center;
  gap:10px;
}
.task__title{font-weight:650; font-size:15px}
.task__meta{font-size:12px; color:var(--muted); margin-top:8px}
.task__notes{font-size:13px; color:var(--muted); margin-top:6px; font-style:italic}
.task__due{font-size:13px; color:var(--text); margin-top:6px; display:flex; gap:8px; align-items:center}
.task__due--overdue{color:var(--danger)}
.task--done .task__title{text-decoration:line-through; color:rgba(233,238,252,.65)}

.badge{
  display:inline-flex;
  padding:4px 10px;
  border-radius:999px;
  font-size:12px;
  border: 1px solid var(--border);
  color:var(--muted);
  white-space:nowrap;
}
.badge--done{border-color: rgba(86,214,166,.35); color: rgba(127,240,194,.95); background: rgba(86,214,166,.08)}
.badge--high{border-color: rgba(255,91,110,.45); color: rgba(255,91,110,.95); background: rgba(255,91,110,.10)}
.badge--medium{border-color: rgba(255,209,102,.45); color: rgba(255,209,102,.95); background: rgba(255,209,102,.10)}
.badge--low{border-color: rgba(74,163,255,.35); color: rgba(74,163,255,.95); background: rgba(74,163,255,.10)}
.badge--category{border-color: rgba(138,113,238,.35); color: rgba(138,113,238,.95); background: rgba(138,113,238,.10)}
.badge--working{border-color: rgba(138,113,238,.45); color: rgba(138,113,238,.95); background: rgba(138,113,238,.12)}

.actions{display:flex; gap:8px; justify-content:flex-end; flex-wrap:wrap}

.filters-form{margin-bottom:0}
.filters-grid{
  display:grid;
  grid-template-columns: 1fr 1fr 1fr 1fr auto auto;
  gap:10px;
  align-items:center;
}

.footer{margin-top:24px; border-top:1px solid var(--border); padding:18px 0; color:var(--muted)}
.footer__inner{display:flex; justify-content:space-between; gap:10px}

@media (max-width: 640px){
  .form{flex-direction:column; align-items:stretch}
  .actions{justify-content:flex-start}
  .topbar{flex-direction:column; align-items:stretch; gap:10px}
  .nav{justify-content:flex-start}
  .filters-grid{grid-template-columns: 1fr; gap:8px}
}