/* ── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:         #f0f2f5;
  --surface:    #ffffff;
  --col-bg:     #e8eaed;
  --border:     #d8dbe0;
  --text:       #1a1b1e;
  --text-mid:   #555768;
  --text-dim:   #8b8fa8;

  --col-open:        #2563eb;
  --col-open-bg:     #eff4ff;
  --col-progress:    #d97706;
  --col-progress-bg: #fffbeb;
  --col-done:        #16a34a;
  --col-done-bg:     #f0fdf4;

  --accent:     #2563eb;
  --danger:     #dc2626;

  --radius:     10px;
  --card-shadow: 0 1px 3px rgba(0,0,0,.10), 0 1px 8px rgba(0,0,0,.06);
  --font: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
}

html { font-size: 16px; }

body {
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
  min-height: 100dvh;
}

/* ── Header ────────────────────────────────────────────── */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-inner {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 60px;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -.02em;
}

.nav-link {
  font-size: .9375rem;
  font-weight: 500;
  color: var(--text-mid);
  text-decoration: none;
  flex: 1;
}
.nav-link:hover { color: var(--text); }

/* ── Buttons ───────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .55rem 1.1rem;
  border-radius: 7px;
  border: 1px solid transparent;
  font: inherit;
  font-size: .9375rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: all .14s;
  white-space: nowrap;
  line-height: 1;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #1d4ed8; }

.btn-ghost {
  background: transparent;
  color: var(--text-mid);
  border-color: var(--border);
}
.btn-ghost:hover { background: var(--col-bg); color: var(--text); }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; }

.btn-sm { padding: .35rem .75rem; font-size: .875rem; }

/* Icon-only move buttons on kanban cards */
.btn-move {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px; height: 28px;
  padding: 0;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-mid);
  font-size: .875rem;
  cursor: pointer;
  transition: all .14s;
  line-height: 1;
}
.btn-move:hover { background: var(--col-bg); color: var(--text); border-color: #b0b4c0; }

/* ── Main wrapper ──────────────────────────────────────── */
.page-body {
  max-width: 1300px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 3rem;
}

/* ── Toolbar / filters ─────────────────────────────────── */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  align-items: center;
  margin-bottom: 1.5rem;
}

.filter-form {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  align-items: center;
  flex: 1;
}


select.filter-select {
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: .5rem .85rem;
  font: inherit;
  font-size: .9375rem;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  box-shadow: var(--card-shadow);
}

/* ── Kanban board ──────────────────────────────────────── */
.board {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1.25rem;
  align-items: start;
}

.column {
  border-radius: var(--radius);
  background: var(--col-bg);
  padding: .75rem;
  min-height: 200px;
}

.column-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .3rem .4rem .75rem;
}

.column-title {
  display: flex;
  align-items: center;
  gap: .55rem;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -.01em;
}

.col-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.column-open     .col-dot { background: var(--col-open); }
.column-progress .col-dot { background: var(--col-progress); }
.column-done     .col-dot { background: var(--col-done); }

.column-count {
  font-size: .8125rem;
  font-weight: 600;
  color: var(--text-dim);
  background: var(--surface);
  border-radius: 20px;
  padding: .1rem .5rem;
}

.add-card-btn {
  display: flex;
  align-items: center;
  gap: .35rem;
  width: 100%;
  padding: .55rem .65rem;
  margin-top: .5rem;
  border: 1.5px dashed var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--text-dim);
  font: inherit;
  font-size: .9rem;
  cursor: pointer;
  text-decoration: none;
  transition: all .14s;
  justify-content: center;
}
.add-card-btn:hover {
  background: rgba(255,255,255,.7);
  border-color: #b0b4c0;
  color: var(--text-mid);
}

/* ── Kanban card ───────────────────────────────────────── */
.kcard {
  background: var(--surface);
  border-radius: 8px;
  padding: .9rem 1rem;
  margin-bottom: .6rem;
  box-shadow: var(--card-shadow);
  border: 1px solid rgba(0,0,0,.06);
  transition: box-shadow .14s, transform .12s;
}
.kcard:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,.13), 0 1px 4px rgba(0,0,0,.08);
  transform: translateY(-1px);
}

.kcard-title {
  display: block;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  margin-bottom: .45rem;
  line-height: 1.35;
}
.kcard-title:hover { color: var(--accent); }

.kcard-meta {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
  margin-bottom: .6rem;
  font-size: .875rem;
}

.kcard-project {
  display: inline-block;
  padding: .15rem .55rem;
  border-radius: 20px;
  font-size: .8rem;
  font-weight: 600;
  background: #eff4ff;
  color: var(--col-open);
}

.kcard-person,
.kcard-date {
  font-size: .875rem;
  color: var(--text-mid);
}

.kcard-date.overdue { color: var(--danger); font-weight: 600; }

.kcard-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: .3rem;
  margin-top: .4rem;
}

.empty-col {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--text-dim);
  font-size: .9375rem;
}

/* ── Detail ────────────────────────────────────────────── */
.detail-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  max-width: 720px;
}

.detail-header {
  padding: 1.75rem;
  border-bottom: 1px solid var(--border);
}

.detail-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: .65rem;
  line-height: 1.25;
}

.detail-meta { display: flex; flex-wrap: wrap; gap: .4rem; }

.status-pill {
  display: inline-block;
  padding: .25rem .7rem;
  border-radius: 20px;
  font-size: .85rem;
  font-weight: 600;
}
.status-open     { background: var(--col-open-bg);     color: var(--col-open); }
.status-inprogress { background: var(--col-progress-bg); color: var(--col-progress); }
.status-done     { background: var(--col-done-bg);     color: var(--col-done); }

.badge-project {
  display: inline-block;
  padding: .25rem .7rem;
  border-radius: 20px;
  font-size: .85rem;
  font-weight: 600;
  background: #eff4ff;
  color: var(--col-open);
}

.badge-overdue {
  display: inline-block;
  padding: .25rem .7rem;
  border-radius: 20px;
  font-size: .85rem;
  font-weight: 600;
  background: #fef2f2;
  color: var(--danger);
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1.25rem;
  padding: 1.5rem 1.75rem;
  border-bottom: 1px solid var(--border);
}

.detail-field label {
  display: block;
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-dim);
  margin-bottom: .25rem;
}

.detail-field span {
  display: block;
  font-size: 1rem;
  color: var(--text);
}

.detail-description {
  padding: 1.5rem 1.75rem;
  white-space: pre-wrap;
  line-height: 1.75;
  color: var(--text-mid);
  font-size: 1rem;
  border-bottom: 1px solid var(--border);
}

.detail-actions {
  padding: 1.1rem 1.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.share-box {
  margin: 0 1.75rem 1.5rem;
  background: var(--col-bg);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: .65rem .9rem;
  display: flex;
  gap: .5rem;
  align-items: center;
  flex-wrap: wrap;
}
.share-box-label { font-size: .85rem; color: var(--text-dim); white-space: nowrap; }
.share-box input {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: .35rem .6rem;
  font: inherit;
  font-size: .875rem;
  background: var(--surface);
  color: var(--text-mid);
  min-width: 0;
}

/* ── Form ──────────────────────────────────────────────── */
.form-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  padding: 2rem;
  max-width: 680px;
}

.form-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 1.75rem;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-group { display: flex; flex-direction: column; gap: .35rem; }
.form-group.full { grid-column: 1 / -1; }

.form-group label {
  font-size: .8125rem;
  font-weight: 600;
  color: var(--text-mid);
  text-transform: uppercase;
  letter-spacing: .06em;
}

.form-group input,
.form-group textarea,
.form-group select {
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: .6rem .85rem;
  font: inherit;
  font-size: 1rem;
  background: var(--surface);
  color: var(--text);
  transition: border-color .14s, box-shadow .14s;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}
.form-group textarea { resize: vertical; }

.form-actions {
  margin-top: 1.75rem;
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
}

.errorlist { list-style: none; color: var(--danger); font-size: .875rem; margin-top: .2rem; }

/* ── Delete ────────────────────────────────────────────── */
.delete-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  padding: 2.5rem;
  text-align: center;
  max-width: 420px;
}
.delete-card h2 { font-size: 1.35rem; margin-bottom: .5rem; }
.delete-card p  { color: var(--text-mid); margin-bottom: 1.75rem; font-size: 1rem; line-height: 1.6; }
.delete-card .actions { display: flex; gap: .75rem; justify-content: center; }

/* ── Shared banner ─────────────────────────────────────── */
.shared-banner {
  background: #eff4ff;
  border: 1px solid #bfdbfe;
  border-radius: 7px;
  padding: .65rem 1rem;
  font-size: .9375rem;
  color: var(--col-open);
  margin-bottom: 1.25rem;
  max-width: 720px;
}

/* ── User menu (header) ────────────────────────────────── */
.user-menu {
  display: flex;
  align-items: center;
  gap: .65rem;
}

.user-name {
  font-size: .9rem;
  color: var(--text-mid);
  white-space: nowrap;
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Login page ────────────────────────────────────────── */
body.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
  background: var(--bg);
}

.login-wrap {
  width: 100%;
  padding: 1.5rem;
  display: flex;
  justify-content: center;
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 4px 24px rgba(0,0,0,.09);
  padding: 2.25rem 2rem;
  width: 100%;
  max-width: 380px;
}

.login-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 1.5rem;
}

.login-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.login-error {
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: 6px;
  padding: .6rem .85rem;
  color: var(--danger);
  font-size: .9rem;
  margin-bottom: 1rem;
}

/* ── Private badge ─────────────────────────────────────── */
.badge-private {
  display: inline-block;
  padding: .25rem .7rem;
  border-radius: 20px;
  font-size: .85rem;
  font-weight: 600;
  background: #fdf4ff;
  color: #7e22ce;
}

.kcard-private-badge {
  font-size: .85rem;
  opacity: .75;
}

/* ── Private toggle in form ────────────────────────────── */
.toggle-label {
  display: flex;
  align-items: center;
  gap: .55rem;
  cursor: pointer;
  font-size: .9375rem;
  color: var(--text-mid);
  padding-top: 1.5rem;
  user-select: none;
}

.toggle-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
  cursor: pointer;
  flex-shrink: 0;
}

/* ── Responsive ────────────────────────────────────────── */
@media (max-width: 860px) {
  .board { grid-template-columns: 1fr 1fr; }
  .column-done { grid-column: 1 / -1; }
}

@media (max-width: 560px) {
  .board { grid-template-columns: 1fr; }
  .column-done { grid-column: auto; }
  .form-grid { grid-template-columns: 1fr; }
  .form-group.full { grid-column: 1; }

}