:root {
  --bg: #f7f4ef;
  --surface: #ffffff;
  --surface-2: #efe9e1;
  --ink: #1f1d1a;
  --ink-2: #5b554d;
  --line: #ddd5ca;
  --accent: #b8533a;
  --accent-ink: #ffffff;
  --accent-soft: #f6e3dc;
  --ok: #2f6f4f;
  --ok-soft: #e1f0e7;
  --warn: #8a5a00;
  --warn-soft: #fbefd4;
  --bad: #9b2c2c;
  --bad-soft: #f8e1e1;
  --info-soft: #e3ecf7;
  --radius: 14px;
  --font: system-ui, -apple-system, 'Segoe UI', Roboto, 'Atkinson Hyperlegible', sans-serif;
  --fs: 18px;
  color-scheme: light;
}
:root[data-contrast='alto'] { --bg: #fff; --surface: #fff; --surface-2: #f1f1f1; --ink: #000; --ink-2: #222; --line: #555; --accent: #8f3420; }
:root[data-size='grande'] { --fs: 21px; }
@media (prefers-color-scheme: dark) {
  :root:not([data-contrast='alto']) {
    --bg: #1c1a18; --surface: #262320; --surface-2: #312d29; --ink: #f3eee8; --ink-2: #c4bbb0; --line: #4a443d;
    --accent: #e07a5f; --accent-ink: #1c1a18; --accent-soft: #4a2a20; --ok: #7fc9a0; --ok-soft: #1f3a2c;
    --warn: #f0c060; --warn-soft: #3d3016; --bad: #f19a9a; --bad-soft: #452222; --info-soft: #23303f; color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { font-size: var(--fs); }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--font); line-height: 1.55; -webkit-text-size-adjust: 100%; }
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5rem; }
h1 { font-size: 1.5rem; } h2 { font-size: 1.25rem; } h3 { font-size: 1.05rem; }
p { margin: .35rem 0 .75rem; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 6px; }
.skip { position: absolute; left: -999px; top: 0; } .skip:focus { left: 8px; top: 8px; background: var(--surface); padding: 8px 12px; z-index: 10; }

/* --- Estructura --- */
.top { position: sticky; top: 0; z-index: 5; background: var(--bg); border-bottom: 1px solid var(--line); }
.top-in { max-width: 760px; margin: 0 auto; display: flex; align-items: center; gap: .5rem; padding: .5rem 1rem; }
.brand { font-weight: 700; text-decoration: none; color: var(--ink); margin-right: auto; display: flex; gap: .4rem; align-items: center; }
.brand-dot { width: 12px; height: 12px; border-radius: 50%; background: var(--accent); display: inline-block; }
.mini-timer { font-variant-numeric: tabular-nums; background: var(--accent-soft); color: var(--ink); border-radius: 999px; padding: .2rem .7rem; text-decoration: none; font-weight: 600; }
.mini-timer[hidden] { display: none; }
main { max-width: 760px; margin: 0 auto; padding: 1rem 1rem 6rem; }
.nav { position: fixed; bottom: 0; left: 0; right: 0; background: var(--surface); border-top: 1px solid var(--line); z-index: 5; }
.nav-in { max-width: 760px; margin: 0 auto; display: grid; grid-template-columns: repeat(5, 1fr); }
.nav a { text-decoration: none; color: var(--ink-2); text-align: center; padding: .45rem .2rem .55rem; font-size: .78rem; display: flex; flex-direction: column; align-items: center; gap: 2px; min-height: 56px; justify-content: center; }
.nav a[aria-current='page'] { color: var(--accent); font-weight: 700; }
.nav .ico { font-size: 1.25rem; line-height: 1; }

/* --- Componentes --- */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.1rem; margin: 0 0 1rem; }
.card.main { border: 2px solid var(--accent); }
.card.soft { background: var(--surface-2); border-color: transparent; }
.row { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; }
.row.end { justify-content: flex-end; }
.row.between { justify-content: space-between; }
.stack > * + * { margin-top: .6rem; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: .6rem; }
@media (max-width: 480px) { .grid2 { grid-template-columns: 1fr; } }
.muted { color: var(--ink-2); }
.small { font-size: .85rem; }
.center { text-align: center; }
.big { font-size: 1.3rem; }
.huge { font-size: 3rem; font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: .02em; }

button, .btn { font: inherit; border: 1px solid var(--line); background: var(--surface); color: var(--ink); border-radius: 12px; padding: .65rem 1rem; min-height: 48px; cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; justify-content: center; gap: .4rem; }
button:hover, .btn:hover { border-color: var(--accent); }
button:disabled { opacity: .55; cursor: not-allowed; }
.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 700; }
.ghost { background: transparent; border-color: transparent; color: var(--accent); }
.danger { color: var(--bad); border-color: var(--bad); }
.wide { width: 100%; }
.chip { border-radius: 999px; min-height: 44px; padding: .4rem .9rem; }
.chip[aria-pressed='true'] { background: var(--accent-soft); border-color: var(--accent); font-weight: 700; }
.icon-btn { min-width: 48px; padding: .5rem; }

label { display: block; font-weight: 600; margin: .6rem 0 .25rem; }
input[type=text], input[type=password], input[type=date], input[type=number], select, textarea {
  font: inherit; width: 100%; padding: .6rem .7rem; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); color: var(--ink); min-height: 48px; }
textarea { min-height: 7rem; resize: vertical; line-height: 1.5; }
input[type=checkbox] { width: 22px; height: 22px; accent-color: var(--accent); vertical-align: middle; }
.check { display: flex; gap: .5rem; align-items: center; font-weight: 500; }

.badge { display: inline-block; font-size: .78rem; border-radius: 999px; padding: .1rem .55rem; background: var(--surface-2); color: var(--ink-2); font-weight: 600; }
.badge.ok { background: var(--ok-soft); color: var(--ok); }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
.badge.bad { background: var(--bad-soft); color: var(--bad); }
.badge.l1 { background: var(--info-soft); color: var(--ink); }
.badge.l2 { background: var(--accent-soft); color: var(--ink); }
.badge.l3 { background: var(--ok-soft); color: var(--ink); }
.note { border-radius: 12px; padding: .7rem .9rem; margin: .5rem 0 1rem; background: var(--info-soft); }
.note.warn { background: var(--warn-soft); }
.note.bad { background: var(--bad-soft); }
.note.ok { background: var(--ok-soft); }
.pending-feature { border: 2px dashed var(--line); border-radius: var(--radius); padding: 1rem; background: var(--surface); }

.steps { display: flex; gap: .35rem; margin: 0 0 1rem; }
.steps span { flex: 1; height: 6px; border-radius: 4px; background: var(--line); }
.steps span.on { background: var(--accent); }
.progress { height: 10px; border-radius: 6px; background: var(--surface-2); overflow: hidden; }
.progress > div { height: 100%; background: var(--accent); width: 0; transition: width .4s; }

.flash { text-align: center; min-height: 12rem; display: flex; flex-direction: column; justify-content: center; gap: .6rem; }
.flash .q { font-size: 1.3rem; font-weight: 700; }
.flash .a { font-size: 1.1rem; }
.source { font-size: .85rem; color: var(--ink-2); border-left: 3px solid var(--line); padding-left: .6rem; margin-top: .6rem; text-align: left; }
.source blockquote { margin: .4rem 0 0; padding: .5rem .7rem; background: var(--surface-2); border-radius: 8px; color: var(--ink); white-space: pre-wrap; }
.opt { width: 100%; justify-content: flex-start; text-align: left; margin: .35rem 0; }
.opt.right { background: var(--ok-soft); border-color: var(--ok); }
.opt.wrong { background: var(--bad-soft); border-color: var(--bad); }
.term { background: var(--accent-soft); border: 0; border-bottom: 2px dotted var(--accent); border-radius: 4px; padding: 0 .15rem; min-height: 0; font: inherit; color: inherit; display: inline; cursor: help; }
.popover { background: var(--surface); border: 2px solid var(--accent); border-radius: 12px; padding: .8rem 1rem; margin: .6rem 0; }

.plan-day { margin: 0 0 1.2rem; }
.plan-day h3 { font-size: .95rem; color: var(--ink-2); }
.plan-day.today h3 { color: var(--accent); }
.task { border: 1px solid var(--line); border-radius: 12px; padding: .75rem .9rem; background: var(--surface); margin: .4rem 0; }
.task.hecho { opacity: .65; }
.task.hecho .t-title { text-decoration: line-through; }
.task .t-title { font-weight: 700; }

.chat { display: flex; flex-direction: column; gap: .6rem; margin-bottom: 1rem; }
.msg { max-width: 92%; padding: .7rem .9rem; border-radius: 14px; white-space: pre-wrap; }
.msg.user { align-self: flex-end; background: var(--accent-soft); }
.msg.assistant { align-self: flex-start; background: var(--surface); border: 1px solid var(--line); }

.micro { display: flex; gap: .6rem; align-items: center; font-size: 1.1rem; }
.micro-list { list-style: none; padding: 0; margin: .5rem 0; }
.micro-list li { padding: .35rem 0; color: var(--ink-2); }
.micro-list li.done { text-decoration: line-through; }
.micro-list li.now { color: var(--ink); font-weight: 700; }
.toast { position: fixed; left: 50%; bottom: 76px; transform: translateX(-50%); background: var(--ink); color: var(--bg); padding: .6rem 1rem; border-radius: 12px; z-index: 20; max-width: 90vw; }
dialog { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); color: var(--ink); max-width: 520px; width: calc(100% - 2rem); }
dialog::backdrop { background: rgba(0, 0, 0, .4); }
.spinner { width: 22px; height: 22px; border: 3px solid var(--line); border-top-color: var(--accent); border-radius: 50%; animation: spin 1s linear infinite; display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }
.drop { border: 2px dashed var(--line); border-radius: var(--radius); padding: 1.2rem; text-align: center; }
.drop.over { border-color: var(--accent); background: var(--accent-soft); }
.file-list { list-style: none; padding: 0; }
.file-list li { padding: .3rem 0; border-bottom: 1px solid var(--line); }
table { border-collapse: collapse; width: 100%; }
td, th { text-align: left; padding: .4rem; border-bottom: 1px solid var(--line); }