/* LAOITDEV — AI Task Operating System
   One stylesheet, no framework. Tokens first, then layout, then components. */

:root {
  color-scheme: light dark;

  --bg:        #f6f7f9;
  --surface:   #ffffff;
  --surface-2: #f0f2f5;
  --line:      #dfe3e8;
  --line-soft: #eaedf1;
  --ink:       #14181f;
  --ink-2:     #4a5563;
  --ink-3:     #79838f;

  --accent:     #2f5cff;
  --accent-ink: #ffffff;
  --accent-sub: #eaf0ff;

  --green: #0f7a46;  --green-bg: #e3f5ec;
  --amber: #9a6400;  --amber-bg: #fdf1da;
  --red:   #b3261e;  --red-bg:   #fdeceb;
  --blue:  #14568c;  --blue-bg:  #e6f0fa;
  --teal:  #0d6a6e;  --teal-bg:  #e2f4f4;
  --violet:#5b3bb5;  --violet-bg:#efeafc;
  --grey:  #55606d;  --grey-bg:  #eceff3;

  --radius: 10px;
  --radius-sm: 7px;
  --shadow: 0 1px 2px rgba(16,24,40,.06), 0 1px 3px rgba(16,24,40,.05);
  --shadow-lg: 0 12px 32px rgba(16,24,40,.16);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:        #0e1116;
    --surface:   #161a21;
    --surface-2: #1d222b;
    --line:      #2a313c;
    --line-soft: #232932;
    --ink:       #e8ecf1;
    --ink-2:     #a8b3c0;
    --ink-3:     #7c8794;

    --accent:     #6d8cff;
    --accent-ink: #0b1020;
    --accent-sub: #1b2440;

    --green: #6ddda0;  --green-bg: #11291d;
    --amber: #f0c070;  --amber-bg: #2c2210;
    --red:   #ff9a91;  --red-bg:   #2e1614;
    --blue:  #8ec1f0;  --blue-bg:  #12222f;
    --teal:  #78d5d5;  --teal-bg:  #11282a;
    --violet:#bda8f5;  --violet-bg:#1e1930;
    --grey:  #9aa5b1;  --grey-bg:  #1e242d;

    --shadow: 0 1px 2px rgba(0,0,0,.4);
    --shadow-lg: 0 16px 40px rgba(0,0,0,.55);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans Lao", sans-serif;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 { margin: 0; line-height: 1.25; font-weight: 650; letter-spacing: -.011em; }
h1 { font-size: 1.5rem; } h2 { font-size: 1.15rem; } h3 { font-size: 1rem; }
p { margin: 0 0 .6rem; }
a { color: var(--accent); }
.muted { color: var(--ink-3); }
.small { font-size: .85rem; }
.mono { font-family: var(--mono); font-size: .85em; }
.right { margin-left: auto; }
.nowrap { white-space: nowrap; }

/* ------------------------------------------------------------------ shell -- */

.topbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: .75rem;
  padding: .6rem clamp(.75rem, 3vw, 1.5rem);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: .55rem; font-weight: 700; letter-spacing: -.02em; }
.brand__mark {
  width: 26px; height: 26px; border-radius: 7px; display: grid; place-items: center;
  background: var(--accent); color: var(--accent-ink); font-size: .72rem; font-weight: 800;
}
.brand__sub { font-weight: 450; color: var(--ink-3); font-size: .78rem; }

.nav { display: flex; gap: .15rem; flex-wrap: wrap; }
.nav a {
  padding: .34rem .6rem; border-radius: var(--radius-sm); text-decoration: none;
  color: var(--ink-2); font-size: .89rem; font-weight: 500;
}
.nav a:hover { background: var(--surface-2); color: var(--ink); }
.nav a[aria-current="page"] { background: var(--accent-sub); color: var(--accent); font-weight: 600; }

.main { padding: clamp(1rem, 3vw, 1.75rem); max-width: 1180px; margin: 0 auto; }
.page-head { display: flex; align-items: flex-start; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.1rem; }
.page-head p { color: var(--ink-2); margin: .2rem 0 0; }

/* ----------------------------------------------------------------- pieces -- */

.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
}
.card__head {
  padding: .8rem 1rem; border-bottom: 1px solid var(--line-soft);
  display: flex; align-items: center; gap: .6rem; flex-wrap: wrap;
}
.card__body { padding: 1rem; }
.card + .card { margin-top: 1rem; }

.grid { display: grid; gap: 1rem; }
.grid--stats { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
.grid--cards { grid-template-columns: repeat(auto-fill, minmax(310px, 1fr)); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.row { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; }
.stack { display: grid; gap: .75rem; }

.stat { padding: .85rem 1rem; }
.stat__n { font-size: 1.7rem; font-weight: 700; letter-spacing: -.02em; }
.stat__l { color: var(--ink-3); font-size: .82rem; }
.stat--alert .stat__n { color: var(--red); }
.stat--warn  .stat__n { color: var(--amber); }

.badge {
  display: inline-flex; align-items: center; gap: .3rem;
  padding: .12rem .45rem; border-radius: 999px;
  font-size: .74rem; font-weight: 600; white-space: nowrap;
  background: var(--grey-bg); color: var(--grey);
}
.badge--green{background:var(--green-bg);color:var(--green)}
.badge--amber{background:var(--amber-bg);color:var(--amber)}
.badge--red{background:var(--red-bg);color:var(--red)}
.badge--blue{background:var(--blue-bg);color:var(--blue)}
.badge--teal{background:var(--teal-bg);color:var(--teal)}
.badge--violet{background:var(--violet-bg);color:var(--violet)}
.badge--grey{background:var(--grey-bg);color:var(--grey)}

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  padding: .46rem .8rem; border-radius: var(--radius-sm); border: 1px solid var(--line);
  background: var(--surface); color: var(--ink);
  font: inherit; font-size: .89rem; font-weight: 550; cursor: pointer;
  text-decoration: none; transition: background .12s, border-color .12s;
}
.btn:hover:not(:disabled) { background: var(--surface-2); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn--primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn--primary:hover:not(:disabled) { filter: brightness(1.08); background: var(--accent); }
.btn--danger { background: var(--red-bg); border-color: transparent; color: var(--red); }
.btn--ghost { background: transparent; border-color: transparent; color: var(--ink-2); }
.btn--ghost:hover:not(:disabled) { background: var(--surface-2); }
.btn--sm { padding: .28rem .55rem; font-size: .82rem; }
.btn--block { width: 100%; }

.icon-btn {
  border: 0; background: transparent; color: var(--ink-3); cursor: pointer;
  font-size: 1.35rem; line-height: 1; padding: .1rem .35rem; border-radius: 6px;
}
.icon-btn:hover { background: var(--surface-2); color: var(--ink); }

label { display: block; font-size: .84rem; font-weight: 600; color: var(--ink-2); margin-bottom: .25rem; }
label .hint { display: block; font-weight: 400; color: var(--ink-3); font-size: .8rem; margin-top: .1rem; }
input[type=text], input[type=email], input[type=password], input[type=date],
input[type=number], textarea, select {
  width: 100%; padding: .48rem .6rem; font: inherit; font-size: .92rem;
  color: var(--ink); background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius-sm);
}
textarea { min-height: 84px; resize: vertical; line-height: 1.5; }
input:focus-visible, textarea:focus-visible, select:focus-visible, .btn:focus-visible, a:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 1px;
}
.field { margin-bottom: .85rem; }
.field--inline { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: .75rem; }

/* ------------------------------------------------------------ task pieces -- */

.tasklist { display: grid; gap: .5rem; }
.taskrow {
  display: grid; grid-template-columns: 1fr auto; gap: .5rem 1rem; align-items: center;
  padding: .7rem .85rem; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius);
  text-decoration: none; color: inherit; transition: border-color .12s, transform .06s;
}
.taskrow:hover { border-color: var(--accent); }
.taskrow:active { transform: translateY(1px); }
.taskrow__title { font-weight: 600; }
.taskrow__meta { color: var(--ink-3); font-size: .83rem; display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; }
.taskrow__side { display: flex; gap: .35rem; align-items: center; flex-wrap: wrap; justify-content: flex-end; }

.taskcard { display: flex; flex-direction: column; gap: .55rem; padding: .95rem; height: 100%; }
.taskcard__outcome { color: var(--ink-2); font-size: .88rem; }

.deadline { font-weight: 600; font-size: .83rem; }
.deadline--red { color: var(--red); } .deadline--amber { color: var(--amber); }
.deadline--green { color: var(--ink-2); } .deadline--grey { color: var(--ink-3); }

/* definition list used across the task page */
.dl { display: grid; gap: .8rem; }
.dl__k { font-size: .78rem; font-weight: 700; color: var(--ink-3); text-transform: uppercase; letter-spacing: .05em; }
.dl__v { margin-top: .15rem; }

.timeline { display: grid; gap: 0; position: relative; }
.timeline__item { display: grid; grid-template-columns: 92px 1fr; gap: .7rem; padding: .45rem 0; font-size: .88rem; }
.timeline__when { color: var(--ink-3); font-size: .79rem; padding-top: .1rem; }
.timeline__what { border-left: 2px solid var(--line); padding-left: .7rem; }
.timeline__kind { font-size: .7rem; font-weight: 700; color: var(--ink-3); letter-spacing: .04em; }

.chat { display: grid; gap: .6rem; max-height: 460px; overflow-y: auto; padding-right: .2rem; }
.msg { padding: .6rem .75rem; border-radius: var(--radius); font-size: .91rem; }
.msg--ai { background: var(--surface-2); }
.msg--user { background: var(--accent-sub); color: var(--ink); justify-self: end; max-width: 85%; }
.msg__role { font-size: .72rem; font-weight: 700; color: var(--ink-3); margin-bottom: .2rem; letter-spacing: .04em; }

.qbox { border: 1px solid var(--line); border-radius: var(--radius); padding: .8rem; background: var(--surface); }
.qbox + .qbox { margin-top: .6rem; }
.qbox__head { display: flex; gap: .5rem; align-items: center; margin-bottom: .4rem; flex-wrap: wrap; }
.qbox__name { font-weight: 650; }
.qbox--off { opacity: .62; }

.pill-list { display: flex; gap: .35rem; flex-wrap: wrap; }

.score-row { display: grid; grid-template-columns: 165px 1fr 46px; gap: .6rem; align-items: center; }
.score-row input[type=range] { width: 100%; accent-color: var(--accent); }
.score-row__n { font-variant-numeric: tabular-nums; font-weight: 700; text-align: right; }
.score-total { font-size: 1.9rem; font-weight: 750; letter-spacing: -.02em; }

.alert { padding: .7rem .85rem; border-radius: var(--radius); display: grid; gap: .2rem; font-size: .9rem; }
.alert--error { background: var(--red-bg); color: var(--red); }
.alert--warn  { background: var(--amber-bg); color: var(--amber); }
.alert--info  { background: var(--blue-bg); color: var(--blue); }
.alert--ok    { background: var(--green-bg); color: var(--green); }

.empty { text-align: center; padding: 2.2rem 1rem; color: var(--ink-3); }
.empty__title { font-weight: 600; color: var(--ink-2); margin: 0; }
.empty__body { margin: .3rem 0 0; font-size: .9rem; }

.loading { display: flex; gap: .5rem; align-items: center; color: var(--ink-3); padding: .8rem 0; font-size: .9rem; }
.spinner {
  width: 15px; height: 15px; border-radius: 50%; flex: none;
  border: 2px solid var(--line); border-top-color: var(--accent);
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.toast {
  position: fixed; left: 50%; bottom: 1.25rem; transform: translate(-50%, 140%);
  background: var(--ink); color: var(--bg); padding: .6rem 1rem; border-radius: 999px;
  font-size: .9rem; font-weight: 550; box-shadow: var(--shadow-lg); z-index: 90;
  transition: transform .22s cubic-bezier(.2,.8,.3,1); max-width: min(92vw, 520px); text-align: center;
}
.toast--on { transform: translate(-50%, 0); }
.toast--error { background: var(--red); color: #fff; }

.modal-backdrop {
  position: fixed; inset: 0; background: rgba(10,14,20,.55); z-index: 80;
  display: grid; place-items: center; padding: 1rem;
}
.modal {
  background: var(--surface); border-radius: 13px; box-shadow: var(--shadow-lg);
  width: min(620px, 100%); max-height: 88vh; display: flex; flex-direction: column;
}
.modal__head { padding: .9rem 1.1rem; border-bottom: 1px solid var(--line-soft); display: flex; align-items: center; }
.modal__head h2 { flex: 1; font-size: 1.05rem; }
.modal__body { padding: 1.1rem; overflow-y: auto; }
.modal__foot { padding: .8rem 1.1rem; border-top: 1px solid var(--line-soft); display: flex; gap: .5rem; justify-content: flex-end; }

/* --------------------------------------------------------------- calendar -- */

.cal { display: grid; grid-template-columns: repeat(7, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.cal__dow { background: var(--surface-2); padding: .4rem; text-align: center; font-size: .74rem; font-weight: 700; color: var(--ink-3); text-transform: uppercase; letter-spacing: .05em; }
.cal__day { background: var(--surface); min-height: 92px; padding: .35rem; display: flex; flex-direction: column; gap: .2rem; }
.cal__day--out { background: var(--surface-2); opacity: .55; }
.cal__day--today { box-shadow: inset 0 0 0 2px var(--accent); }
.cal__n { font-size: .76rem; color: var(--ink-3); font-weight: 600; }
.cal__ev {
  font-size: .72rem; padding: .12rem .3rem; border-radius: 4px; text-decoration: none;
  background: var(--accent-sub); color: var(--accent); overflow: hidden;
  text-overflow: ellipsis; white-space: nowrap; display: block;
}
.cal__ev--red { background: var(--red-bg); color: var(--red); }
.cal__ev--amber { background: var(--amber-bg); color: var(--amber); }
.cal__ev--done { background: var(--green-bg); color: var(--green); }

/* ------------------------------------------------------------------ login -- */

.login-wrap { min-height: 100dvh; display: grid; place-items: center; padding: 1.25rem; }
.login { width: min(420px, 100%); }
.login__brand { text-align: center; margin-bottom: 1.25rem; }
.login__brand .brand { justify-content: center; font-size: 1.3rem; }
.login__demo { margin-top: .9rem; font-size: .82rem; color: var(--ink-3); }
.login__demo button { background: none; border: 0; color: var(--accent); cursor: pointer; font: inherit; padding: 0; text-decoration: underline; }

table.data { width: 100%; border-collapse: collapse; font-size: .89rem; }
table.data th, table.data td { text-align: left; padding: .5rem .6rem; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
table.data th { font-size: .76rem; text-transform: uppercase; letter-spacing: .05em; color: var(--ink-3); }
.table-scroll { overflow-x: auto; }

@media (max-width: 640px) {
  .topbar { flex-wrap: wrap; }
  .timeline__item { grid-template-columns: 1fr; gap: .1rem; }
  .timeline__what { border-left: 0; padding-left: 0; }
  .score-row { grid-template-columns: 1fr 46px; }
  .score-row label { grid-column: 1 / -1; margin-bottom: 0; }
  .cal__day { min-height: 64px; }
}

@media print {
  .topbar, .btn, .nav { display: none !important; }
  body { background: #fff; }
}