:root {
  --paper: oklch(96.2% 0.014 88);
  --panel: oklch(99% 0.006 88);
  --hover: oklch(97.8% 0.011 88);
  --line: oklch(88% 0.02 88);
  --line-strong: oklch(78% 0.025 88);
  --ink: oklch(23% 0.025 170);
  --muted: oklch(45% 0.025 160);
  --accent: oklch(40% 0.09 170);
  --accent-soft: oklch(92% 0.04 170);

  --rail-bg: oklch(24% 0.04 170);
  --rail-ink: oklch(94% 0.02 100);
  --rail-muted: oklch(77% 0.03 150);
  --rail-active: oklch(33% 0.05 170);

  --todo: oklch(44% 0.03 250);
  --todo-bg: oklch(93% 0.012 250);
  --progress: oklch(45% 0.15 255);
  --progress-bg: oklch(93% 0.035 255);
  --blocked: oklch(48% 0.18 32);
  --blocked-bg: oklch(94% 0.04 32);
  --done: oklch(42% 0.11 155);
  --done-bg: oklch(93% 0.04 155);

  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --rail-w: 15rem;
  --detail-w: 29rem;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.5;
  font-variant-numeric: tabular-nums;
  caret-color: var(--accent);
  scrollbar-color: var(--line-strong) transparent;
}
::selection { background: oklch(86% 0.07 170); color: var(--ink); }
h1, h2, h3, p, ul { margin: 0; padding: 0; }
ul { list-style: none; }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }

:focus-visible {
  outline: 3px solid oklch(55% 0.16 255);
  outline-offset: 2px;
  border-radius: 4px;
}
.skip {
  position: absolute; left: 0.5rem; top: -4rem; z-index: 100;
  background: var(--ink); color: var(--paper); padding: 0.6rem 1rem; border-radius: 6px;
}
.skip:focus { top: 0.5rem; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Layout ------------------------------------------------------------ */
.app {
  display: grid;
  grid-template-columns: var(--rail-w) minmax(0, 1fr);
  min-height: 100vh;
  min-height: 100dvh;
}
.app.has-detail { grid-template-columns: var(--rail-w) minmax(0, 1fr) var(--detail-w); }
.slot:empty { display: none; }

.rail {
  background: var(--rail-bg);
  color: var(--rail-ink);
  padding: 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100dvh;
}
.brand { display: flex; align-items: center; gap: 0.7rem; padding: 0 0.5rem; }
.brand-mark { color: oklch(84% 0.12 130); flex: none; }
.brand-name { font-family: var(--serif); font-size: 1.4rem; font-weight: 700; letter-spacing: -0.01em; line-height: 1.1; }
.brand-sub { font-size: 0.8rem; color: var(--rail-muted); }
.rail-head { font-size: 0.8rem; font-weight: 600; color: var(--rail-muted); padding: 0 0.5rem 0.5rem; letter-spacing: 0.02em; }
.views-list { display: grid; gap: 2px; }
.view-btn {
  width: 100%;
  display: flex; align-items: center; gap: 0.7rem;
  padding: 0.55rem 0.5rem;
  background: none; border: 0; border-radius: 8px;
  color: var(--rail-ink); text-align: left;
  transition: background-color 0.15s;
}
.view-btn:hover { background: oklch(29% 0.045 170); }
.view-btn[aria-pressed="true"] { background: var(--rail-active); font-weight: 600; }
.view-btn .n { margin-left: auto; color: var(--rail-muted); font-size: 0.9rem; }
.view-btn[aria-pressed="true"] .n { color: var(--rail-ink); }
.rail :focus-visible { outline-color: oklch(85% 0.12 130); }
.rail-foot { margin-top: auto; font-size: 0.8rem; color: var(--rail-muted); padding: 0 0.5rem; }

.main { padding: 2rem clamp(1.25rem, 3vw, 3rem) 4rem; min-width: 0; }
.main > * { max-width: 60rem; }
.mobile-brand { display: none; }

.main-head { display: flex; align-items: baseline; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.25rem; }
.main-head h1 {
  font-family: var(--serif); font-weight: 700; font-size: 2.4rem; line-height: 1.1;
  letter-spacing: -0.02em; text-wrap: balance;
}
.count { color: var(--muted); font-size: 0.95rem; }

/* Tools ------------------------------------------------------------- */
.tools { display: flex; gap: 0.75rem; margin-bottom: 1rem; align-items: end; }
.field { display: grid; gap: 0.3rem; }
.field label { font-size: 0.8rem; font-weight: 600; color: var(--muted); }
.field-search { flex: 1 1 auto; min-width: 0; }
.field-filter { flex: 0 0 11.5rem; }
.search-wrap { position: relative; }
.search-wrap svg { position: absolute; left: 0.8rem; top: 50%; translate: 0 -50%; color: var(--muted); pointer-events: none; }
input[type="search"], select {
  width: 100%; height: 2.75rem;
  border: 1px solid var(--line-strong); border-radius: 8px;
  background: var(--panel); padding: 0 0.85rem;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input[type="search"] { padding-left: 2.4rem; appearance: none; -webkit-appearance: none; }
input[type="search"]::placeholder { color: oklch(47% 0.02 160); opacity: 1; }
input[type="search"]::-webkit-search-cancel-button { cursor: pointer; }
input:hover, select:hover { border-color: var(--muted); }
select {
  appearance: none; -webkit-appearance: none; padding-right: 2.2rem; cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='m5 8 5 5 5-5' fill='none' stroke='%23465' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 0.6rem center; background-size: 1.1rem;
}

/* List -------------------------------------------------------------- */
.list-wrap { border-top: 2px solid var(--ink); }
.task {
  position: relative;
  display: grid;
  grid-template-columns: 1.5rem minmax(0, 1fr) auto;
  gap: 0.25rem 1rem;
  padding: 1.05rem 0.75rem;
  border-bottom: 1px solid var(--line);
  transition: background-color 0.15s;
}
.task:hover { background: var(--hover); }
.task[aria-current="true"] { background: var(--accent-soft); }
.task.flash { animation: flash 1.4s var(--ease); }
@keyframes flash { from { background: oklch(90% 0.1 100); } }

.s-ico { grid-row: 1 / span 2; padding-top: 0.2rem; }
.s-ico svg { display: block; }
[data-status="todo"] { --c: var(--todo); --cb: var(--todo-bg); }
[data-status="in-progress"] { --c: var(--progress); --cb: var(--progress-bg); }
[data-status="blocked"] { --c: var(--blocked); --cb: var(--blocked-bg); }
[data-status="done"] { --c: var(--done); --cb: var(--done-bg); }
.s-ico { color: var(--c); }

.task-title { font-size: 1.1rem; font-weight: 600; line-height: 1.3; }
.open {
  all: unset; cursor: pointer; text-wrap: pretty;
}
.open::after { content: ""; position: absolute; inset: 0; }
.open:focus-visible { outline: 3px solid oklch(55% 0.16 255); outline-offset: -3px; border-radius: 4px; }
.task[data-status="done"] .open { color: var(--muted); text-decoration: line-through; text-decoration-color: var(--line-strong); text-decoration-thickness: 1px; }
.task-sum {
  color: var(--muted); font-size: 0.95rem; max-width: 65ch;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.task-main { grid-column: 2; min-width: 0; display: grid; gap: 0.3rem; }
.task-meta { display: flex; flex-wrap: wrap; gap: 0.25rem 0.9rem; font-size: 0.85rem; color: var(--muted); align-items: center; margin-top: 0.15rem; }
.who { display: inline-flex; align-items: center; gap: 0.4rem; }
.avatar {
  width: 1.4rem; height: 1.4rem; border-radius: 50%;
  display: inline-grid; place-items: center;
  font-size: 0.65rem; font-weight: 700; letter-spacing: 0.02em;
  background: oklch(88% 0.05 var(--h, 150)); color: oklch(28% 0.06 var(--h, 150));
}
.tag { padding: 0 0.45rem; border: 1px solid var(--line-strong); border-radius: 99px; font-size: 0.78rem; line-height: 1.4; }

.task-side { grid-column: 3; grid-row: 1 / span 2; display: grid; gap: 0.4rem; justify-items: end; align-content: start; font-size: 0.85rem; color: var(--muted); }
.chip {
  display: inline-flex; align-items: center; gap: 0.35rem;
  padding: 0.15rem 0.6rem; border-radius: 99px;
  background: var(--cb); color: var(--c); font-weight: 600; font-size: 0.82rem; white-space: nowrap;
}
.due, .comments, .prio { display: inline-flex; align-items: center; gap: 0.35rem; white-space: nowrap; }
.prio-high { color: var(--blocked); font-weight: 600; }

/* Empty ------------------------------------------------------------- */
.empty { padding: 3.5rem 1rem; text-align: center; display: grid; justify-items: center; gap: 0.6rem; color: var(--muted); }
.empty[hidden] { display: none; }
.empty h2 { font-family: var(--serif); font-size: 1.6rem; color: var(--ink); }
.empty p { max-width: 38ch; }
.btn {
  margin-top: 0.5rem; height: 2.75rem; padding: 0 1.2rem;
  background: var(--ink); color: var(--paper); border: 0; border-radius: 8px; font-weight: 600;
  transition: background-color 0.15s;
}
.btn:hover { background: var(--accent); }

/* Detail ------------------------------------------------------------ */
.detail {
  position: sticky; top: 0;
  height: 100vh; height: 100dvh;
  overflow-y: auto;
  background: var(--panel);
  border-left: 1px solid var(--line-strong);
  padding: 1.25rem 1.5rem 3rem;
  animation: slide-in 0.35s var(--ease);
}
@keyframes slide-in { from { opacity: 0; translate: 1.5rem 0; } }
.detail-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.25rem; gap: 1rem; }
.detail-id { font-size: 0.85rem; color: var(--muted); }
.close {
  display: inline-flex; align-items: center; gap: 0.4rem;
  height: 2.5rem; padding: 0 0.9rem 0 0.7rem;
  background: none; border: 1px solid var(--line-strong); border-radius: 8px; font-weight: 600;
  transition: background-color 0.15s;
}
.close:hover { background: var(--hover); border-color: var(--muted); }
.detail h2 {
  font-family: var(--serif); font-size: 1.9rem; line-height: 1.15; font-weight: 700;
  letter-spacing: -0.015em; text-wrap: balance; margin-bottom: 1.25rem;
}
.detail h2:focus { outline: none; }
.status-box { background: var(--cb); border-radius: 10px; padding: 0.9rem 1rem 1rem; display: grid; gap: 0.4rem; margin-bottom: 1.5rem; transition: background-color 0.3s; }
.status-box label { font-size: 0.8rem; font-weight: 700; color: var(--c); }
.status-box select { border-color: var(--c); font-weight: 600; }
.saved { font-size: 0.88rem; color: var(--c); min-height: 1.3em; display: flex; align-items: center; gap: 0.4rem; }
.saved:empty { display: none; }
.hidden-note { font-size: 0.88rem; color: var(--muted); }
.facts { display: grid; grid-template-columns: 7rem 1fr; gap: 0.7rem 1rem; margin: 0 0 1.5rem; padding: 1rem 0; border-block: 1px solid var(--line); font-size: 0.95rem; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; display: flex; flex-wrap: wrap; gap: 0.3rem 0.5rem; align-items: center; }
.body-head { font-size: 0.8rem; font-weight: 700; color: var(--muted); margin-bottom: 0.5rem; }
.body { white-space: pre-line; max-width: 65ch; font-size: 1.02rem; line-height: 1.65; }

/* Toast ------------------------------------------------------------- */
.toast-region { position: fixed; z-index: 60; left: 50%; bottom: 1.25rem; translate: -50% 0; width: min(28rem, calc(100vw - 1.5rem)); display: grid; gap: 0.5rem; pointer-events: none; }
.toast {
  pointer-events: auto;
  display: flex; align-items: center; gap: 0.75rem;
  background: var(--ink); color: var(--paper);
  padding: 0.7rem 0.75rem 0.7rem 1rem; border-radius: 10px;
  box-shadow: 0 10px 30px -8px oklch(20% 0.03 170 / 0.45), 0 2px 6px oklch(20% 0.03 170 / 0.2);
  animation: toast-in 0.4s var(--ease);
}
.toast p { flex: 1; font-size: 0.95rem; }
.toast button { background: none; border: 1px solid oklch(80% 0.03 100); color: var(--paper); border-radius: 6px; height: 2.25rem; padding: 0 0.8rem; font-weight: 600; }
.toast button:hover { background: oklch(32% 0.04 170); }
.toast :focus-visible { outline-color: oklch(85% 0.12 130); }
@keyframes toast-in { from { opacity: 0; translate: 0 1rem; } }

/* Responsive -------------------------------------------------------- */
@media (max-width: 1100px) {
  .app.has-detail { grid-template-columns: var(--rail-w) minmax(0, 1fr); }
  .detail {
    position: fixed; inset: 0; z-index: 40; height: auto;
    border-left: 0; padding-inline: max(1.25rem, calc((100vw - 40rem) / 2));
  }
}
@media (max-width: 820px) {
  .app, .app.has-detail { grid-template-columns: minmax(0, 1fr); }
  .rail { display: none; }
  .main { padding: 1rem 1rem 5rem; }
  .mobile-brand { display: flex; align-items: center; gap: 0.5rem; width: 100%; font-family: var(--serif); font-weight: 700; font-size: 1.1rem; color: var(--accent); margin-bottom: 0.25rem; }
  .main-head { gap: 0.25rem 0.75rem; margin-bottom: 1rem; }
  .main-head h1 { font-size: 1.9rem; }
  .tools { flex-direction: column; align-items: stretch; gap: 0.6rem; }
  .field-filter { flex: none; }
  .task { grid-template-columns: 1.5rem minmax(0, 1fr); padding: 0.95rem 0.25rem; }
  .task-side {
    grid-column: 2; grid-row: auto; display: flex; flex-wrap: wrap; justify-items: initial;
    gap: 0.3rem 0.9rem; align-items: center; margin-top: 0.3rem;
  }
  .task-side .chip { order: -1; }
  .detail { padding-block: 1rem 3rem; padding-inline: 1.1rem; }
  .detail h2 { font-size: 1.6rem; }
  .facts { grid-template-columns: 6rem 1fr; }
  .toast-region { bottom: 0.75rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}