/* ==========================================================================
   QR Manager — design tokens
   Ink + paper palette. IBM Plex Sans for UI, IBM Plex Mono for codes/data.
   Flat hairline surfaces, no soft-shadow card kit, restrained accent color.
   ========================================================================== */

:root {
  --ink: #14161A;
  --ink-soft: #262A33;
  --paper: #FAFAF7;
  --paper-raised: #FFFFFF;
  --line: #E4E1D9;
  --line-strong: #CFCBC0;
  --text: #1B1D22;
  --text-muted: #6B6B63;
  --text-faint: #9B968A;

  --accent: #2B5FFF;
  --accent-ink: #14205C;
  --accent-tint: #EAEFFF;

  --success: #1F9D55;
  --success-tint: #E7F6ED;
  --warning: #C77D19;
  --warning-tint: #FBF0DE;
  --danger: #C4432B;
  --danger-tint: #FBEAE5;

  --radius-sm: 5px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --shadow-pop: 0 8px 24px rgba(20, 22, 26, 0.10);

  --font-ui: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 14.5px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { font-weight: 600; margin: 0 0 4px; color: var(--ink); letter-spacing: -0.01em; }
h1 { font-size: 22px; }
h2 { font-size: 18px; }
h3 { font-size: 15px; }
p { margin: 0 0 10px; }

code, .mono, .short-code, .kpi-value, .table td.num { font-family: var(--font-mono); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ---------------- App shell ---------------- */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
  width: 236px;
  flex-shrink: 0;
  background: var(--ink);
  color: #D8DAE2;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
}

.sidebar-brand {
  padding: 20px 20px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-brand .mark {
  width: 30px; height: 30px;
  border-radius: 7px;
  background: var(--accent);
  display: grid;
  place-items: center;
  color: white;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
}
.sidebar-brand .name { color: #fff; font-weight: 600; font-size: 15px; }
.sidebar-brand .sub { font-size: 11px; color: #8C90A0; }

.sidebar-nav { padding: 14px 10px; flex: 1; overflow-y: auto; }
.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  margin-bottom: 2px;
  border-radius: var(--radius-sm);
  color: #C3C6D2;
  font-size: 13.5px;
  text-decoration: none;
}
.sidebar-nav a:hover { background: rgba(255,255,255,0.06); color: #fff; }
.sidebar-nav a.active { background: var(--accent); color: #fff; }
.sidebar-nav .nav-label {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #6E7284;
  padding: 14px 12px 6px;
}
.sidebar-foot {
  padding: 14px 20px 18px;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 12px;
  color: #8C90A0;
}

.main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 26px;
  border-bottom: 1px solid var(--line);
  background: var(--paper-raised);
  position: sticky;
  top: 0;
  z-index: 5;
}
.topbar .page-title { font-size: 17px; font-weight: 600; color: var(--ink); }
.topbar .user-chip {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--text-muted);
}
.topbar .avatar {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--accent-tint); color: var(--accent-ink);
  display: grid; place-items: center; font-weight: 600; font-size: 12px;
}

.content { padding: 24px 26px 60px; }

/* ---------------- Flash messages ---------------- */
.flash { padding: 11px 16px; border-radius: var(--radius-md); margin-bottom: 16px; font-size: 13.5px; border: 1px solid transparent; }
.flash-success { background: var(--success-tint); color: #14602f; border-color: #bfe6cc; }
.flash-error   { background: var(--danger-tint); color: #7c2c1b; border-color: #f0c3b6; }
.flash-warning { background: var(--warning-tint); color: #7a4d0f; border-color: #edd39d; }
.flash-info    { background: var(--accent-tint); color: var(--accent-ink); border-color: #c6d3ff; }

/* ---------------- Buttons ---------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong);
  background: var(--paper-raised);
  color: var(--text);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  line-height: 1.3;
}
.btn:hover { border-color: var(--text-muted); text-decoration: none; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: #1e4fe0; border-color: #1e4fe0; }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-danger:hover { background: #a8371f; }
.btn-ghost { background: transparent; border-color: transparent; color: var(--text-muted); }
.btn-ghost:hover { background: rgba(20,22,26,0.05); }
.btn-sm { padding: 5px 10px; font-size: 12.5px; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }
.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }

/* ---------------- Cards / panels ---------------- */
.panel {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 18px;
}
.panel-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 14px;
}
.panel-head p.sub { color: var(--text-muted); font-size: 12.5px; margin: 2px 0 0; }

.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ---------------- KPI tiles ---------------- */
.kpi {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--paper-raised);
  padding: 16px 18px;
}
.kpi .kpi-label { font-size: 12px; color: var(--text-muted); margin-bottom: 6px; }
.kpi .kpi-value { font-size: 24px; font-weight: 600; color: var(--ink); }
.kpi .kpi-delta { font-size: 11.5px; margin-top: 4px; color: var(--text-faint); }

/* ---------------- Forms ---------------- */
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 12.5px; font-weight: 600; color: var(--ink-soft); margin-bottom: 5px; }
.field .hint { font-size: 11.5px; color: var(--text-faint); margin-top: 4px; }
input[type=text], input[type=url], input[type=email], input[type=password],
input[type=number], input[type=date], input[type=datetime-local], input[type=search],
input[type=color], select, textarea {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--paper-raised);
  font-family: var(--font-ui);
  font-size: 13.5px;
  color: var(--text);
}
input[type=color] { padding: 3px; height: 38px; }
textarea { resize: vertical; min-height: 80px; }
input:focus, select:focus, textarea:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-tint); }
.form-row { display: flex; gap: 14px; }
.form-row .field { flex: 1; }
.checkbox-row { display: flex; align-items: center; gap: 8px; }
.checkbox-row input { width: auto; }

/* ---------------- Tables ---------------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius-lg); }
table.table { width: 100%; border-collapse: collapse; background: var(--paper-raised); }
table.table th {
  text-align: left; font-size: 11.5px; text-transform: none; color: var(--text-muted);
  font-weight: 600; padding: 10px 14px; border-bottom: 1px solid var(--line); white-space: nowrap;
  background: #FCFCFA;
}
table.table td { padding: 11px 14px; border-bottom: 1px solid var(--line); font-size: 13.5px; vertical-align: middle; }
table.table tr:last-child td { border-bottom: none; }
table.table tr:hover td { background: #FBFBF9; }

/* ---------------- Badges / status ---------------- */
.badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 9px; border-radius: 100px; font-size: 11.5px; font-weight: 600;
}
.badge-dot { width: 6px; height: 6px; border-radius: 50%; }
.badge-active { background: var(--success-tint); color: #14602f; }
.badge-active .badge-dot { background: var(--success); }
.badge-disabled { background: #EFEDE7; color: var(--text-muted); }
.badge-disabled .badge-dot { background: var(--text-faint); }
.badge-expired { background: var(--warning-tint); color: #7a4d0f; }
.badge-expired .badge-dot { background: var(--warning); }
.badge-archived { background: #EFEDE7; color: var(--text-faint); }

.tag-pill {
  display: inline-block; padding: 2px 8px; border-radius: 100px;
  background: var(--accent-tint); color: var(--accent-ink); font-size: 11px; margin: 0 4px 4px 0;
}

/* ---------------- Misc ---------------- */
.text-muted { color: var(--text-muted); }
.text-faint { color: var(--text-faint); }
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }
.short-link { font-family: var(--font-mono); font-size: 13px; color: var(--accent-ink); background: var(--accent-tint); padding: 3px 8px; border-radius: 5px; }

.qr-preview-box {
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-md);
  padding: 18px;
  display: grid;
  place-items: center;
  background: #fff;
  min-height: 220px;
}
.qr-preview-box img { max-width: 220px; }

.empty-state {
  text-align: center; padding: 50px 20px; color: var(--text-muted);
}
.empty-state h3 { color: var(--ink); margin-bottom: 6px; }

.pagination { display: flex; gap: 6px; margin-top: 14px; }
.pagination a, .pagination span {
  padding: 6px 11px; border: 1px solid var(--line); border-radius: var(--radius-sm);
  font-size: 12.5px; color: var(--text-muted); text-decoration: none;
}
.pagination a:hover { border-color: var(--accent); color: var(--accent); }
.pagination .current { background: var(--ink); color: #fff; border-color: var(--ink); }

.login-wrap {
  min-height: 100vh; display: grid; place-items: center; background: var(--ink);
  background-image: radial-gradient(circle at 20% 20%, rgba(43,95,255,0.25), transparent 45%),
                     radial-gradient(circle at 80% 80%, rgba(43,95,255,0.15), transparent 45%);
}
.login-card {
  width: 380px; background: var(--paper-raised); border-radius: var(--radius-lg);
  padding: 32px; box-shadow: var(--shadow-pop);
}
.login-card .mark {
  width: 40px; height: 40px; border-radius: 9px; background: var(--accent);
  color: #fff; display: grid; place-items: center; font-family: var(--font-mono); font-weight: 700; margin-bottom: 16px;
}

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 18px; }
.tabs a { padding: 9px 14px; font-size: 13px; color: var(--text-muted); text-decoration: none; border-bottom: 2px solid transparent; }
.tabs a.active { color: var(--ink); border-bottom-color: var(--accent); font-weight: 600; }

.color-swatch { display: inline-block; width: 16px; height: 16px; border-radius: 4px; border: 1px solid var(--line-strong); vertical-align: -3px; margin-right: 6px; }

.dropzone {
  border: 1.5px dashed var(--line-strong); border-radius: var(--radius-md);
  padding: 22px; text-align: center; color: var(--text-muted); font-size: 13px;
}

.stat-strip { display: flex; gap: 22px; flex-wrap: wrap; }
.stat-strip .stat { min-width: 110px; }
.stat-strip .stat .n { font-family: var(--font-mono); font-size: 20px; font-weight: 600; color: var(--ink); }
.stat-strip .stat .l { font-size: 11.5px; color: var(--text-muted); }

@media (max-width: 860px) {
  .sidebar { position: fixed; left: -236px; transition: left 0.15s ease; z-index: 40; }
  .sidebar.open { left: 0; }
  .form-row { flex-direction: column; }
}