:root {
  --brand-50: #f0fdfa;
  --brand-100: #ccfbf1;
  --brand-500: #14b8a6;
  --brand-600: #0d9488;
  --brand-700: #0f766e;
  --brand-900: #134e4a;
  --accent-500: #f59e0b;
  --accent-600: #d97706;
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-400: #94a3b8;
  --slate-600: #475569;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --danger-600: #dc2626;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--slate-50);
  color: var(--slate-900);
  line-height: 1.55;
}

.container { width: min(1100px, 92vw); margin: 0 auto; }
.stack > * + * { margin-block-start: var(--gap, 1rem); }
.row { display: flex; flex-wrap: wrap; gap: var(--gap, 1rem); align-items: center; }
.grid { display: grid; gap: var(--gap, 1rem); }
.grid-stack > * + * { margin-block-start: var(--gap, 1rem); }

a { color: var(--brand-700); }
a:hover { text-decoration: underline; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: .65rem 1.1rem; border-radius: .45rem; border: none;
  font-weight: 600; cursor: pointer; text-decoration: none;
  transition: transform .08s ease, background .15s ease;
}
.btn-primary { background: var(--brand-600); color: #fff; }
.btn-primary:hover { background: var(--brand-700); }
.btn-secondary { background: #fff; color: var(--brand-700); border: 1px solid var(--slate-200); }
.btn-danger { background: var(--danger-600); color: #fff; }
.btn-sm { padding: .45rem .85rem; font-size: .875rem; }
.btn-xs { padding: .3rem .6rem; font-size: .8rem; }

.btn-form { display: inline; }

.card {
  background: #fff; border: 1px solid var(--slate-200); border-radius: .75rem;
  padding: 1.25rem; box-shadow: 0 1px 2px rgba(15, 23, 42, .05);
}
.card-centered { max-width: 520px; margin-left: auto; margin-right: auto; margin-top: 2rem; margin-bottom: 2rem; }
.card-narrow { max-width: 420px; }
.card-wide { max-width: 560px; }
.card-full { max-width: 640px; }
.card + .card-push-top { margin-top: 1.5rem; }

.stack-gap-sm { --gap: .6rem; }
.stack-gap-md { --gap: .75rem; }
.stack-gap-lg { --gap: 1rem; }

.search-form { margin-bottom: 1rem; }
.search-input { max-width: 300px; }

.grid-dashboard { grid-template-columns: repeat(auto-fit,minmax(260px,1fr)); }
.grid-spaces { grid-template-columns: repeat(auto-fit,minmax(260px,1fr)); margin-top: 1.25rem; }
.grid-space-detail { grid-template-columns: repeat(auto-fit,minmax(300px,1fr)); }
.grid-admin { grid-template-columns: repeat(auto-fit,minmax(300px,1fr)); }

.space-between { justify-content: space-between; }

.checkbox-label {
  display: flex; gap: .5rem; align-items: flex-start; font-weight: 400;
}
.checkbox-label input[type="checkbox"] {
  width: auto; margin-top: .25rem;
}
.radio-label { font-weight: 400; }

.inline-form { display: inline; }

.plain-list { max-height: 30rem; overflow: auto; }

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .95rem;
}
.admin-table th,
.admin-table td {
  padding: .65rem .5rem;
  border-bottom: 1px solid var(--slate-200);
  text-align: left;
  vertical-align: top;
}
.admin-table th {
  font-weight: 600;
  color: var(--slate-600);
}
.admin-table tbody tr:last-child td {
  border-bottom: none;
}

.pagination {
  margin-top: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: .75rem;
}
.pagination p { margin: 0; color: var(--slate-600); }
.page-links { display: flex; gap: .5rem; }

.empty-state {
  text-align: center;
  color: var(--slate-600);
}
.empty-state h2 {
  color: var(--slate-800);
  margin-top: 0;
}

.invite-result { margin-top: .75rem; }

input, textarea, select {
  width: 100%; padding: .6rem .75rem; border: 1px solid var(--slate-200);
  border-radius: .45rem; font: inherit; background: #fff;
}
input:focus, textarea:focus, select:focus { outline: 2px solid var(--brand-500); outline-offset: 1px; }
label { display: block; font-size: .875rem; font-weight: 600; margin-bottom: .35rem; color: var(--slate-600); }

.topbar {
  background: #fff; border-bottom: 1px solid var(--slate-200);
  position: sticky; top: 0; z-index: 20;
}
.topbar .container { display: flex; align-items: center; justify-content: space-between; min-height: 3.5rem; }
.topbar a.logo { font-weight: 800; color: var(--brand-700); text-decoration: none; font-size: 1.25rem; }
.topbar nav { display: flex; gap: 1.25rem; align-items: center; }
.topbar nav a { color: var(--slate-600); text-decoration: none; font-size: .95rem; font-weight: 500; }
.topbar nav a:hover { color: var(--brand-700); }

.page { padding: 2rem 0 4rem; }
.page h1 { font-size: clamp(1.75rem, 5vw, 2.5rem); margin: 0 0 .5rem; }
.page h2 { font-size: 1.35rem; margin: 1.5rem 0 .5rem; }
.page p.lead { color: var(--slate-600); font-size: 1.1rem; margin: 0 0 1.5rem; }

.flash { padding: .85rem 1rem; border-radius: .45rem; margin-bottom: 1rem; }
.flash-error { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.flash-success { background: #f0fdfa; color: #115e59; border: 1px solid #99f6e4; }

.memory-list { display: grid; gap: .75rem; }
.memory-item { background: #fff; border: 1px solid var(--slate-200); border-radius: .5rem; padding: 1rem; }
.memory-item footer { font-size: .8rem; color: var(--slate-400); margin-top: .5rem; display: flex; gap: .75rem; }

@media (max-width: 640px) {
  .topbar nav { gap: .9rem; }
  .topbar nav a { font-size: .87rem; }
  .page { padding: 1.25rem 0 3rem; }
}