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

:root {
  --purple:     #9333ea;
  --purple-lt:  #f5f3ff;
  --purple-bd:  #e9d5ff;
  --green:      #16a34a;
  --green-lt:   #f0fdf4;
  --red:        #dc2626;
  --red-lt:     #fef2f2;
  --yellow:     #d97706;
  --yellow-lt:  #fffbeb;
  --gray-50:    #f8fafc;
  --gray-100:   #f1f5f9;
  --gray-200:   #e2e8f0;
  --gray-300:   #cbd5e1;
  --gray-400:   #94a3b8;
  --gray-500:   #64748b;
  --gray-600:   #475569;
  --gray-700:   #334155;
  --gray-800:   #1e293b;
  --gray-900:   #0f172a;
  --radius:     8px;
  --radius-lg:  12px;
  --shadow:     0 1px 3px rgba(0,0,0,.10), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:  0 4px 6px -1px rgba(0,0,0,.10), 0 2px 4px -1px rgba(0,0,0,.06);
  --shadow-lg:  0 10px 15px -3px rgba(0,0,0,.10), 0 4px 6px -2px rgba(0,0,0,.05);
}

html { height: 100%; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--gray-800);
  background: var(--gray-50);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--purple); text-decoration: none; }
.hidden { display: none !important; }

/* ── Login Screen ─────────────────────────────────────────────────────── */
.login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1rem;
  background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
}
.login-card {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 2.5rem 2rem 2rem;
  width: 100%;
  max-width: 420px;
}
.login-logo {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: var(--purple);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; margin: 0 auto 1rem;
}
.login-title { text-align: center; font-size: 1.25rem; font-weight: 700; margin-bottom: .25rem; }
.login-sub   { text-align: center; font-size: .82rem; color: var(--gray-500); margin-bottom: 1.25rem; }
.login-tabs  { display: flex; border-bottom: 2px solid var(--gray-200); margin-bottom: 1.25rem; }
.login-tab   { flex: 1; padding: .5rem; background: none; border: none; font-size: .88rem; font-weight: 600; color: var(--gray-500); cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -2px; transition: color .15s, border-color .15s; font-family: inherit; }
.login-tab.active { color: var(--purple); border-bottom-color: var(--purple); }
.login-form  { display: flex; flex-direction: column; gap: .75rem; }
.login-field label { display: block; font-size: .8rem; font-weight: 600; color: var(--gray-600); margin-bottom: .3rem; }
.login-field input {
  width: 100%; height: 42px; padding: 0 .85rem;
  border: 1.5px solid var(--gray-300); border-radius: var(--radius);
  font-size: .9rem; font-family: inherit; outline: none;
  transition: border-color .13s, box-shadow .13s;
}
.login-field input:focus { border-color: var(--purple); box-shadow: 0 0 0 3px rgba(147,51,234,.12); }
.login-submit {
  height: 44px; background: var(--purple); color: #fff;
  border: none; border-radius: var(--radius);
  font-size: .95rem; font-weight: 700; cursor: pointer; font-family: inherit;
  transition: background .15s;
}
.login-submit:hover { background: #7e22ce; }
.login-error { font-size: .82rem; color: var(--red); background: var(--red-lt); border-radius: var(--radius); padding: .5rem .75rem; }
.login-section-label { font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--gray-400); margin-top: .25rem; }

/* ── App Layout ────────────────────────────────────────────────────────── */
#app-header {
  background: #fff;
  border-bottom: 1px solid var(--gray-200);
  box-shadow: var(--shadow);
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center;
  gap: 1rem; padding: 0 1.25rem; height: 56px;
  flex-wrap: wrap;
}
.header-logo {
  display: flex; align-items: center; gap: .5rem;
  font-weight: 800; color: var(--gray-900); font-size: 1.05rem;
  white-space: nowrap;
}
.header-logo-icon {
  width: 30px; height: 30px; border-radius: 8px; background: var(--purple);
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: .85rem; flex-shrink: 0;
}
.header-book-wrap { display: flex; align-items: center; gap: .5rem; flex: 1; min-width: 0; }
#book-select {
  max-width: 280px; flex: 1;
  height: 34px; padding: 0 .75rem;
  border: 1.5px solid var(--gray-200); border-radius: var(--radius);
  font-size: .85rem; font-family: inherit; background: var(--gray-50);
  color: var(--gray-700); outline: none;
}
.hbtn {
  height: 32px; padding: 0 .85rem;
  border: 1.5px solid var(--gray-200); border-radius: var(--radius);
  background: #fff; font-size: .82rem; font-weight: 600; cursor: pointer;
  color: var(--gray-600); font-family: inherit; white-space: nowrap;
  transition: all .13s;
}
.hbtn:hover { border-color: var(--purple); color: var(--purple); }
.hbtn-danger:hover { border-color: var(--red); color: var(--red); }
.hbtn-primary { background: var(--purple); color: #fff; border-color: var(--purple); }
.hbtn-primary:hover { background: #7e22ce; color: #fff; border-color: #7e22ce; }
#username-display { font-size: .8rem; color: var(--gray-500); white-space: nowrap; max-width: 140px; overflow: hidden; text-overflow: ellipsis; }

/* ── Tab Nav ───────────────────────────────────────────────────────────── */
.tab-nav {
  background: #fff;
  border-bottom: 2px solid var(--gray-200);
  display: flex; gap: 0;
  padding: 0 1.25rem;
  overflow-x: auto;
  scrollbar-width: none;
}
.tab-nav::-webkit-scrollbar { display: none; }
.tab-btn {
  display: flex; align-items: center; gap: .4rem;
  padding: .75rem 1.1rem;
  background: none; border: none; border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  font-size: .88rem; font-weight: 600; color: var(--gray-500);
  cursor: pointer; white-space: nowrap; font-family: inherit;
  transition: color .15s, border-color .15s;
}
.tab-btn:hover { color: var(--purple); }
.tab-btn.active { color: var(--purple); border-bottom-color: var(--purple); }
.tab-btn i { font-size: .82rem; }

/* ── Panels ────────────────────────────────────────────────────────────── */
#main-content { flex: 1; overflow: auto; }
.tab-panel { padding: 1.25rem; max-width: 1280px; margin: 0 auto; }

.panel-header {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: .75rem; margin-bottom: 1rem;
}
.panel-title { font-size: 1.05rem; font-weight: 800; color: var(--gray-900); }
.panel-sub   { font-size: .82rem; color: var(--gray-500); margin-top: .15rem; }

/* ── Oversikt – summary cards ──────────────────────────────────────────── */
.overview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}
.ov-card {
  background: #fff; border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg); padding: 1rem 1.1rem;
  box-shadow: var(--shadow);
}
.ov-card-label { font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--gray-500); margin-bottom: .25rem; }
.ov-card-val   { font-size: 1.45rem; font-weight: 800; color: var(--gray-900); }
.ov-card-sub   { font-size: .78rem; color: var(--gray-500); margin-top: .15rem; }
.ov-card.ok    { border-color: #bbf7d0; background: var(--green-lt); }
.ov-card.warn  { border-color: #fde68a; background: var(--yellow-lt); }
.ov-card.err   { border-color: #fecaca; background: var(--red-lt); }

/* ── Table wrapper ─────────────────────────────────────────────────────── */
.tbl-card {
  background: #fff; border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg); box-shadow: var(--shadow);
  overflow: hidden;
}
.tbl-card-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: .75rem 1rem; border-bottom: 1px solid var(--gray-200);
  background: var(--gray-50);
}
.tbl-card-title { font-size: .88rem; font-weight: 700; color: var(--gray-700); }
.tbl-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* ── Data tables ───────────────────────────────────────────────────────── */
.data-table {
  width: 100%; border-collapse: collapse;
  font-size: .82rem;
}
.data-table th {
  text-align: left; padding: .55rem .75rem;
  border-bottom: 2px solid var(--gray-200);
  background: var(--gray-50); color: var(--gray-500);
  font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em;
  white-space: nowrap;
}
.data-table th.num,
.data-table td.num { text-align: right; }
.data-table td {
  padding: .55rem .75rem;
  border-bottom: 1px solid var(--gray-100);
  color: var(--gray-700); white-space: nowrap;
}
.data-table tbody tr:hover td { background: var(--gray-50); }
.data-table tbody tr.totals-row td {
  font-weight: 700; background: var(--gray-50);
  border-top: 2px solid var(--gray-200); border-bottom: none;
  color: var(--gray-900);
}
.data-table tbody tr.totals-row:hover td { background: var(--gray-100); }

/* Highlight rows with issues */
.data-table tbody tr.row-warn td { background: #fffbeb; }
.data-table tbody tr.row-err  td { background: #fef2f2; }
.data-table tbody tr.row-ok   td { background: var(--green-lt); }
.data-table tbody tr.row-warn:hover td { background: #fef3c7; }
.data-table tbody tr.row-err:hover  td { background: #fee2e2; }

/* ── Diff badges ────────────────────────────────────────────────────────── */
.diff-ok   { color: var(--green); font-weight: 700; }
.diff-warn { color: var(--yellow); font-weight: 700; }
.diff-err  { color: var(--red); font-weight: 700; }
.diff-zero { color: var(--gray-400); }
.badge {
  display: inline-flex; align-items: center; gap: .2rem;
  padding: .15rem .5rem; border-radius: 999px;
  font-size: .7rem; font-weight: 700; white-space: nowrap;
}
.badge-ok   { background: var(--green-lt); color: var(--green); }
.badge-warn { background: var(--yellow-lt); color: var(--yellow); }
.badge-err  { background: var(--red-lt);   color: var(--red); }

/* ── Section group headers in table ─────────────────────────────────────── */
.data-table .tbl-section th {
  background: var(--purple-lt); color: var(--purple);
  font-size: .72rem; padding: .4rem .75rem;
  border-bottom: 1px solid var(--purple-bd);
  border-top: 1px solid var(--purple-bd);
}

/* ── Edit button ─────────────────────────────────────────────────────────── */
.edit-btn {
  height: 26px; padding: 0 .65rem;
  border: 1.5px solid var(--gray-200); border-radius: var(--radius);
  background: #fff; font-size: .75rem; font-weight: 600; cursor: pointer;
  color: var(--gray-500); font-family: inherit; transition: all .13s;
}
.edit-btn:hover { border-color: var(--purple); color: var(--purple); }

/* ── Modal ───────────────────────────────────────────────────────────────── */
.backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,.45); z-index: 200;
  backdrop-filter: blur(2px);
}
.modal {
  position: fixed; inset: 0;
  z-index: 201;
  display: flex; align-items: center; justify-content: center;
  padding: 1rem;
}
.modal-inner {
  background: #fff; border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%; max-width: 600px;
  max-height: calc(100vh - 2rem);
  overflow-y: auto;
}
.modal-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 1.25rem .875rem;
  border-bottom: 1px solid var(--gray-200);
  position: sticky; top: 0; background: #fff; z-index: 1;
}
.modal-title { font-size: 1rem; font-weight: 800; color: var(--gray-900); }
.modal-close {
  width: 30px; height: 30px; border-radius: 50%;
  border: none; background: var(--gray-100); cursor: pointer;
  font-size: 1rem; color: var(--gray-500); display: flex; align-items: center; justify-content: center;
  transition: background .13s;
}
.modal-close:hover { background: var(--gray-200); }
.modal-body   { padding: 1.1rem 1.25rem; }
.modal-footer { padding: .875rem 1.25rem; border-top: 1px solid var(--gray-200); display: flex; gap: .5rem; justify-content: flex-end; }

/* Form grid */
.form-section-label {
  font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em;
  color: var(--purple); margin: 1rem 0 .5rem; padding-top: .75rem;
  border-top: 1px solid var(--purple-bd);
}
.form-section-label:first-child { margin-top: 0; border-top: none; padding-top: 0; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .65rem; }
.form-grid .full { grid-column: 1 / -1; }
.field-grp label  { display: block; font-size: .78rem; font-weight: 600; color: var(--gray-600); margin-bottom: .25rem; }
.field-grp input, .field-grp textarea, .field-grp select {
  width: 100%; padding: .4rem .65rem; height: 36px;
  border: 1.5px solid var(--gray-300); border-radius: var(--radius);
  font-size: .88rem; font-family: inherit; outline: none;
  transition: border-color .13s, box-shadow .13s;
}
.field-grp input:focus, .field-grp textarea:focus, .field-grp select:focus {
  border-color: var(--purple); box-shadow: 0 0 0 3px rgba(147,51,234,.1);
}
.field-grp textarea { height: 60px; resize: vertical; }
.field-hint { font-size: .72rem; color: var(--gray-400); margin-top: .2rem; }

/* Modal action buttons */
.btn { height: 38px; padding: 0 1.1rem; border-radius: var(--radius); font-size: .88rem; font-weight: 700; cursor: pointer; font-family: inherit; border: none; transition: background .15s; }
.btn-primary  { background: var(--purple); color: #fff; }
.btn-primary:hover { background: #7e22ce; }
.btn-outline  { background: #fff; color: var(--gray-600); border: 1.5px solid var(--gray-300); }
.btn-outline:hover { border-color: var(--purple); color: var(--purple); }
.btn-danger   { background: var(--red); color: #fff; }
.btn-danger:hover { background: #b91c1c; }

/* ── Innstillinger ─────────────────────────────────────────────────────── */
.settings-card {
  background: #fff; border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg); box-shadow: var(--shadow);
  padding: 1.5rem; max-width: 480px;
}
.settings-card h3 { font-size: .95rem; font-weight: 800; margin-bottom: 1rem; color: var(--gray-900); }
.settings-form { display: flex; flex-direction: column; gap: .75rem; }
.rates-info {
  background: var(--purple-lt); border: 1px solid var(--purple-bd);
  border-radius: var(--radius); padding: .875rem 1rem; font-size: .8rem;
  color: var(--gray-700); line-height: 1.6; margin-top: 1.25rem;
}
.rates-info strong { color: var(--purple); }

/* ── Empty state ─────────────────────────────────────────────────────────── */
.empty-state {
  text-align: center; padding: 3rem 1rem; color: var(--gray-400);
}
.empty-state i { font-size: 2.5rem; margin-bottom: .75rem; display: block; }
.empty-state p { font-size: .9rem; margin-bottom: 1rem; }

/* ── Toasts ──────────────────────────────────────────────────────────────── */
#toast-container { position: fixed; bottom: 1.25rem; right: 1.25rem; z-index: 300; display: flex; flex-direction: column; gap: .5rem; }
.toast { padding: .65rem 1rem; border-radius: var(--radius); font-size: .84rem; font-weight: 600; box-shadow: var(--shadow-md); color: #fff; max-width: 320px; animation: fadeUp .25s ease; }
.toast.ok   { background: var(--green); }
.toast.err  { background: var(--red); }
.toast.warn { background: #d97706; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* ── Disabled button state ─────────────────────────────────────────────── */
.btn:disabled, .hbtn:disabled {
  opacity: .6;
  cursor: not-allowed;
  pointer-events: none;
}

/* ── Print / PDF ─────────────────────────────────────────────────────────── */
@media print {
  .no-print, #app-header, .tab-nav, #toast-container { display: none !important; }
  body { background: #fff; font-size: 11pt; }
  .tab-panel { padding: .5cm; max-width: none; }
  .tab-panel.hidden { display: none !important; }
  .tbl-card { box-shadow: none; border: 1px solid #ccc; }
  .tbl-card-header { background: #f4f4f4; }
  .overview-grid { grid-template-columns: repeat(4, 1fr); }
  .ov-card { break-inside: avoid; }
  .data-table th { background: #f0f0f0; font-size: 8pt; }
  .data-table td { font-size: 9pt; }
  .tbl-scroll { overflow: visible; }
  @page { margin: 1.5cm; size: A4 landscape; }
}

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .tab-btn span { display: none; }
  .tab-btn { padding: .75rem .85rem; }
  #username-display { display: none; }
  .form-grid { grid-template-columns: 1fr; }
  .form-grid .full { grid-column: 1; }
  .modal-inner { max-width: 100%; max-height: 90dvh; }
  #app-header { height: auto; padding: .5rem 1rem; }
  .header-book-wrap { flex: 0 0 100%; }
  .hbtn { height: 40px; padding: 0 .9rem; }
  .panel-header { flex-wrap: wrap; gap: .5rem; }
  .tab-panel { padding: 1rem; }
  .data-table { font-size: .8rem; }
  .data-table th, .data-table td { padding: .45rem .6rem; }
  .tbl-card-header { flex-wrap: wrap; gap: .5rem; }
  .overview-grid { grid-template-columns: 1fr 1fr; }
}