:root {
  --cream: #f6efe3;
  --paper: #fffdf6;
  --navy: #1d2f4b;
  --navy-soft: #2c4568;
  --orange: #ff6a2b;
  --orange-dark: #d94f16;
  --ink: #1d2f4b;
  --muted: #6b6257;
  --green: #2f7d4f;
  --shadow: 6px 6px 0 var(--navy);
  --shadow-sm: 4px 4px 0 var(--navy);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  font-size: 18px;
  line-height: 1.45;
}

.hidden { display: none !important; }
.muted { color: var(--muted); font-size: 0.9rem; }
.error { color: #b3261e; font-weight: 600; padding: 8px 0; }

.topbar {
  background: var(--navy);
  border-bottom: 4px solid var(--orange);
  padding: 18px 16px 14px;
}
.topbar-inner { max-width: 1100px; margin: 0 auto; }
.topbar h1 {
  margin: 0;
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--cream);
}
.tagline { margin: 4px 0 12px; color: #cfd8e6; font-size: 1rem; }
.top-actions { display: flex; flex-wrap: wrap; gap: 10px; }

.btn {
  appearance: none;
  border: 3px solid var(--navy);
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  font-weight: 700;
  font-size: 1rem;
  padding: 10px 16px;
  min-height: 46px;
  border-radius: 10px;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform 0.06s ease, box-shadow 0.06s ease;
}
.btn:active { transform: translate(2px, 2px); box-shadow: 2px 2px 0 var(--navy); }
.btn-primary { background: var(--orange); color: #fff; }
.btn-primary:active { box-shadow: 2px 2px 0 var(--orange-dark); }
.btn-secondary { background: var(--paper); }
.btn-ghost { background: transparent; color: var(--cream); border-color: var(--cream); box-shadow: none; }
.btn-big { width: 100%; font-size: 1.1rem; }

main { max-width: 1100px; margin: 0 auto; padding: 20px 16px 40px; }

.login-card {
  max-width: 420px;
  margin: 48px auto;
  background: var(--paper);
  border: 3px solid var(--navy);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 28px 24px;
}
.login-card h2 { margin: 0 0 4px; font-size: 1.6rem; font-weight: 900; }
.login-card label { display: block; font-weight: 700; margin: 16px 0 6px; }
.login-card input {
  width: 100%;
  font: inherit;
  padding: 12px 14px;
  border: 3px solid var(--navy);
  border-radius: 10px;
  background: #fff;
  margin-bottom: 16px;
}

.add-panel {
  background: var(--paper);
  border: 3px solid var(--navy);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 16px;
  margin-bottom: 24px;
}
.add-panel label { font-weight: 700; display: block; margin-bottom: 8px; }
.add-panel input {
  font: inherit;
  padding: 10px 12px;
  border: 3px solid var(--navy);
  border-radius: 10px;
  background: #fff;
  width: 100%;
  min-height: 46px;
}
.add-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 10px; }
.add-row input { flex: 1 1 140px; width: auto; }

.group-banner {
  display: inline-block;
  background: var(--navy);
  color: var(--cream);
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: 0.03em;
  padding: 8px 18px;
  border-radius: 10px;
  border: 3px solid var(--navy);
  box-shadow: var(--shadow-sm);
  margin: 28px 0 16px;
}
.group-banner.due-now { background: var(--orange); border-color: var(--orange-dark); box-shadow: 4px 4px 0 var(--orange-dark); }
.group-banner.done-banner { background: var(--muted); box-shadow: 4px 4px 0 var(--navy); }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 18px;
}

.card {
  position: relative;
  background: var(--paper);
  border: 3px solid var(--navy);
  border-radius: 6px 14px 14px 14px;
  box-shadow: var(--shadow);
  padding: 18px 16px 14px;
  min-height: 150px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.card:nth-child(odd) { transform: rotate(-0.6deg); }
.card:nth-child(even) { transform: rotate(0.6deg); }
.card.overdue { background: #ffe9df; }
.card.done-card { opacity: 0.72; }
.card.done-card .card-text { text-decoration: line-through; }
.card.clearing { transition: opacity 0.25s ease, transform 0.25s ease; opacity: 0; transform: translateY(-14px) rotate(-3deg); }

.tick {
  position: absolute;
  top: -12px;
  right: -12px;
  width: 34px;
  height: 34px;
  border: 3px solid var(--navy);
  border-radius: 50%;
  background: var(--paper);
  box-shadow: 3px 3px 0 var(--navy);
  cursor: pointer;
  font-size: 1.1rem;
  font-weight: 900;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: transparent;
}
.tick.ticked { background: var(--green); color: #fff; }

.card-text { font-size: 1.15rem; font-weight: 700; margin-top: 6px; overflow-wrap: anywhere; }

.card-meta { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-size: 0.9rem; }
.due-label { font-weight: 800; color: var(--navy-soft); }
.due-label.overdue { color: #b3261e; }
.due-label button {
  font: inherit; font-weight: 800; color: inherit;
  background: none; border: none; padding: 4px; margin: -4px;
  text-decoration: underline; text-decoration-style: solid;
  text-decoration-thickness: 1.5px; text-underline-offset: 3px;
  cursor: pointer; min-height: 0;
}

.status-pill {
  font-size: 0.8rem;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: 999px;
  border: 2px solid var(--navy);
  background: #e9eef6;
}
.status-pill.in_progress { background: #ffe1c9; }
.status-pill.done { background: #d7ecd9; }

.card-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: auto; }
.card-actions .btn { font-size: 0.95rem; padding: 8px 12px; min-height: 44px; flex: 1 1 auto; }

.date-editor { display: flex; flex-wrap: wrap; gap: 8px; }
.date-echo { margin-top: 6px; font-size: 0.9rem; font-weight: 600; }

.date-editor input {
  font: inherit; font-size: 0.95rem; padding: 6px 8px;
  border: 2px solid var(--navy); border-radius: 8px; background: #fff;
  flex: 1 1 130px; min-height: 40px;
}

.empty { text-align: center; padding: 60px 16px; }
.empty-note {
  display: inline-block;
  background: var(--paper);
  border: 3px solid var(--navy);
  border-radius: 6px 14px 14px 14px;
  box-shadow: var(--shadow);
  padding: 22px 28px;
  font-size: 1.3rem;
  font-weight: 800;
  transform: rotate(-1deg);
  margin-bottom: 16px;
}

.footer { text-align: center; padding: 24px 16px 40px; }

@media (max-width: 640px) {
  .topbar h1 { font-size: 1.6rem; }
  .card-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
  .card { min-height: 140px; padding: 14px 12px 12px; }
  .card-text { font-size: 1.05rem; }
}
@media (max-width: 420px) {
  .card-grid { grid-template-columns: 1fr; }
}