Improve overall UI visibility and color contrast

frontend/src/styles.css

@@ -1,23 +1,30 @@
 :root {
-  --bg: #f4f6fb;
+  --bg: #f3f6fb;
   --panel: #ffffff;
   --ink: #1f2937;
-  --muted: #6b7280;
+  --muted: #64748b;
-  --line: #e5e7eb;
+  --line: #d8dee9;
   --brand: #2563eb;
   --brand-soft: #eef2ff;
+  --accent: #0f766e;
+  --accent-soft: #ccfbf1;
+  --warn: #d97706;
+  --warn-soft: #fffbeb;
+  --danger: #dc2626;
+  --danger-soft: #fef2f2;
   --on: #16a34a;
 }
 
 * { box-sizing: border-box; }
-body { margin: 0; font-family: system-ui, "Segoe UI", Roboto, sans-serif; color: var(--ink); background: var(--bg); }
+body { margin: 0; font-family: system-ui, "Segoe UI", Roboto, sans-serif; color: var(--ink); background: linear-gradient(180deg, #eef4ff 0, var(--bg) 220px); }
 
 .app { min-height: 100vh; }
 
 .topbar {
   position: sticky; top: 0; z-index: 50;
-  background: rgba(255,255,255,.97); backdrop-filter: blur(10px);
+  background: rgba(255,255,255,.98); backdrop-filter: blur(10px);
-  border-bottom: 1px solid var(--line);
+  border-bottom: 1px solid #cbd5e1;
+  box-shadow: 0 1px 0 rgba(15,23,42,.03);
   padding: 8px 24px 7px;
 }
 .topbar-main { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 6px; }
@@ -41,21 +48,21 @@ body { margin: 0; font-family: system-ui, "Segoe UI", Roboto, sans-serif; color:
   background: transparent; color: var(--ink);
   padding: 6px 10px; font: inherit; font-size: 13px; cursor: pointer;
 }
-.top-tab:hover { background: var(--bg); border-color: var(--line); }
+.top-tab:hover { background: #f1f5f9; border-color: #cbd5e1; }
-.top-tab.active { background: var(--brand); color: #fff; border-color: var(--brand); font-weight: 700; }
+.top-tab.active { background: var(--brand); color: #fff; border-color: var(--brand); font-weight: 700; box-shadow: 0 1px 2px rgba(37,99,235,.2); }
 .top-tab.compact { color: var(--muted); }
 .top-tab.compact.active { color: #fff; }
 .brand { display: flex; align-items: center; gap: 10px; margin: 0; color: var(--brand); }
 .brand-logo { display: inline-flex; color: var(--brand); }
-.brand-name { font-weight: 800; font-size: 19px; letter-spacing: 0; }
+.brand-name { font-weight: 800; font-size: 19px; letter-spacing: 0; color: #1d4ed8; }
 .nav-item {
   display: flex; align-items: center; gap: 10px;
   width: 100%; text-align: left;
   background: transparent; border: 0; border-radius: 8px;
   padding: 10px 10px; font-size: 14px; color: var(--ink); cursor: pointer;
 }
-.nav-item:hover { background: var(--bg); }
+.nav-item:hover { background: #f1f5f9; }
-.nav-item.active { background: var(--brand-soft); color: var(--brand); font-weight: 600; }
+.nav-item.active { background: var(--brand-soft); color: var(--brand); font-weight: 700; box-shadow: inset 3px 0 0 var(--brand); }
 .ico { width: 18px; text-align: center; }
 .hint { margin-top: auto; font-size: 12px; color: var(--muted); padding: 12px 8px 0; }
 
@@ -64,24 +71,24 @@ body { margin: 0; font-family: system-ui, "Segoe UI", Roboto, sans-serif; color:
 h1 { margin: 0 0 6px; font-size: 24px; }
 .muted { color: var(--muted); }
 
-.banner { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; }
+.banner { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; border-left: 4px solid #94a3b8; background: #f8fafc; }
-.banner.error { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }
+.banner.error { background: var(--danger-soft); color: #991b1b; border: 1px solid #fecaca; border-left-color: var(--danger); }
 
 .cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; margin-top: 20px; }
-.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
+.card { background: var(--panel); border: 1px solid var(--line); border-top: 3px solid #cbd5e1; border-radius: 12px; padding: 16px; box-shadow: 0 1px 2px rgba(15,23,42,.04); }
-.card.on { border-color: #bbf7d0; }
+.card.on { border-color: #bbf7d0; border-top-color: var(--on); background: #f8fffb; }
 .card-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
 .card-title { font-weight: 600; }
 .card-cat { font-size: 12px; color: var(--muted); margin-top: 2px; }
 .card-desc { font-size: 14px; color: #374151; margin: 10px 0 12px; }
 .card-foot { display: flex; flex-wrap: wrap; gap: 6px; }
 
-.tag { font-size: 12px; padding: 3px 8px; border-radius: 999px; background: #f3f4f6; color: var(--muted); }
+.tag { font-size: 12px; padding: 3px 8px; border-radius: 999px; background: #f1f5f9; color: #475569; border: 1px solid #e2e8f0; }
-.tag.on { background: #dcfce7; color: var(--on); }
+.tag.on { background: #dcfce7; color: #166534; border-color: #bbf7d0; }
-.tag.core { background: var(--brand-soft); color: var(--brand); }
+.tag.core { background: var(--brand-soft); color: var(--brand); border-color: #c7d2fe; }
-.tag.dep { background: #fef9c3; color: #854d0e; }
+.tag.dep { background: #fef9c3; color: #854d0e; border-color: #fde68a; }
 
-.toggle { width: 44px; height: 26px; border-radius: 999px; border: 0; background: #d1d5db; position: relative; cursor: pointer; transition: background .15s; flex: none; }
+.toggle { width: 44px; height: 26px; border-radius: 999px; border: 0; background: #cbd5e1; position: relative; cursor: pointer; transition: background .15s; flex: none; }
 .toggle.on { background: var(--on); }
 .toggle:disabled { opacity: .5; cursor: not-allowed; }
 .knob { position: absolute; top: 3px; left: 3px; width: 20px; height: 20px; background: #fff; border-radius: 50%; transition: left .15s; }
@@ -89,18 +96,19 @@ h1 { margin: 0 0 6px; font-size: 24px; }
 
 /* --- Formulieren --- */
 .form-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin: 18px 0; }
-.form-card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 16px; margin: 18px 0; }
+.form-card { background: #ffffff; border: 1px solid var(--line); border-top: 3px solid #bfdbfe; border-radius: 12px; padding: 16px; margin: 18px 0; box-shadow: 0 1px 2px rgba(15,23,42,.04); }
 .form-card .form-row { margin: 0 0 12px; }
 input, select {
   font: inherit; padding: 9px 11px; border: 1px solid var(--line);
   border-radius: 8px; background: #fff; color: var(--ink); min-width: 150px;
 }
-input:focus, select:focus { outline: 2px solid var(--brand-soft); border-color: var(--brand); }
+input:hover, select:hover { border-color: #cbd5e1; }
+input:focus, select:focus { outline: 3px solid var(--brand-soft); border-color: var(--brand); }
 
-.btn { font: inherit; padding: 9px 14px; border-radius: 8px; border: 1px solid var(--line); background: #fff; cursor: pointer; }
+.btn { font: inherit; padding: 9px 14px; border-radius: 8px; border: 1px solid #cbd5e1; background: #fff; cursor: pointer; color: var(--ink); box-shadow: 0 1px 1px rgba(15,23,42,.04); }
-.btn:hover { background: var(--bg); }
+.btn:hover { background: #f8fafc; border-color: #94a3b8; }
 .btn.primary { background: var(--brand); color: #fff; border-color: var(--brand); }
-.btn.danger { background: #fee2e2; color: #b91c1c; border-color: #fca5a5; }
+.btn.danger { background: #fee2e2; color: #991b1b; border-color: #fca5a5; }
 .btn.danger:hover { background: #fecaca; }
 
 /* Subtiele weergave-opties (kleine icoonknopjes, rechts in de balk) */
@@ -115,9 +123,11 @@ input:focus, select:focus { outline: 2px solid var(--brand-soft); border-color:
 .link.danger { color: #b91c1c; }
 
 /* --- Tabel --- */
-.grid { width: 100%; border-collapse: collapse; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
+.grid { width: 100%; border-collapse: collapse; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; box-shadow: 0 1px 2px rgba(15,23,42,.04); }
 .grid th, .grid td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); font-size: 14px; vertical-align: top; }
-.grid th { background: #fafbff; font-size: 12px; text-transform: uppercase; letter-spacing: .4px; color: var(--muted); }
+.grid th { background: #eef4ff; font-size: 12px; text-transform: uppercase; letter-spacing: .4px; color: #334155; }
+.grid tbody tr:nth-child(even) { background: #fbfdff; }
+.grid tbody tr:hover { background: #f1f7ff; }
 .grid tr:last-child td { border-bottom: 0; }
 .row-actions { display: flex; gap: 10px; white-space: nowrap; }
 .small { font-size: 12px; }
@@ -125,9 +135,9 @@ input:focus, select:focus { outline: 2px solid var(--brand-soft); border-color:
 /* --- Chips / filters --- */
 .filterbar { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin: 8px 0 16px; }
 .chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
-.chip { font: inherit; font-size: 13px; padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line); background: #fff; cursor: pointer; }
+.chip { font: inherit; font-size: 13px; padding: 6px 12px; border-radius: 999px; border: 1px solid #cbd5e1; background: #fff; color: #334155; cursor: pointer; }
-.chip:hover { background: var(--bg); }
+.chip:hover { background: #f1f5f9; border-color: #94a3b8; }
-.chip.on { background: var(--brand); color: #fff; border-color: var(--brand); }
+.chip.on { background: var(--brand); color: #fff; border-color: var(--brand); box-shadow: 0 1px 2px rgba(37,99,235,.18); }
 .leden-keuze { margin: 4px 0 12px; }
 
 .badge { display: inline-block; min-width: 22px; text-align: center; padding: 1px 7px; border-radius: 999px; background: var(--brand-soft); color: var(--brand); font-size: 12px; font-weight: 600; }
@@ -139,7 +149,7 @@ input:focus, select:focus { outline: 2px solid var(--brand-soft); border-color:
 .rij-actief { background: var(--brand-soft); }
 input[type="color"] { padding: 2px; width: 44px; min-width: 44px; height: 38px; }
 
-.subpaneel { margin-top: 24px; padding: 18px; border: 1px solid var(--line); border-radius: 12px; background: #fafbff; }
+.subpaneel { margin-top: 24px; padding: 18px; border: 1px solid #cbd5e1; border-left: 4px solid var(--accent); border-radius: 12px; background: #f8fbff; }
 .subpaneel h2 { margin: 0 0 12px; font-size: 18px; }
 
 .tag.dag-studiedag { background: #e0e7ff; color: #3730a3; }
@@ -307,12 +317,12 @@ input[type="color"] { padding: 2px; width: 44px; min-width: 44px; height: 38px;
 .tree-subchildren { margin-top: 0; border-left-color: #dbeafe; }
 .tree-meta { padding-left: 16px; }
 .tree-empty { padding: 8px 0 8px 12px; }
-.modal-overlay { position: fixed; inset: 0; background: rgba(15,23,42,.45); display: flex; align-items: flex-start; justify-content: center; padding: 40px 16px; z-index: 900; overflow: auto; }
+.modal-overlay { position: fixed; inset: 0; background: rgba(15,23,42,.5); display: flex; align-items: flex-start; justify-content: center; padding: 40px 16px; z-index: 900; overflow: auto; }
-.modal { background: var(--panel); border-radius: 12px; padding: 18px 20px; width: min(560px, 100%); box-shadow: 0 20px 50px rgba(0,0,0,.3); }
+.modal { background: var(--panel); border: 1px solid #cbd5e1; border-top: 4px solid var(--brand); border-radius: 12px; padding: 18px 20px; width: min(560px, 100%); box-shadow: 0 20px 50px rgba(15,23,42,.28); }
 .modal-kop { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
 .modal-kop h2 { margin: 0; font-size: 18px; }
 .rooster-modal { width: min(920px, calc(100vw - 32px)); padding: 16px; }
-.modal-editor { margin-top: 0; padding: 12px; background: #f9fafb; }
+.modal-editor { margin-top: 0; padding: 12px; background: #f8fbff; border-color: #cbd5e1; }
 .modal-editor .editor-grid { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 10px; }
 .modal-editor .editor-grid input, .modal-editor .editor-grid select { font-size: 13px; padding: 9px 10px; }
 .modal-editor .editor-detail { padding-top: 10px; margin-top: 10px; }
@@ -368,10 +378,10 @@ input[type="color"] { padding: 2px; width: 44px; min-width: 44px; height: 38px;
 .nav-item.nav-sub { padding-left: 26px; font-size: 13.5px; }
 
 /* --- Tabs (o.a. in het Rooster) --- */
-.tabbar { display: flex; gap: 6px; margin: 8px 0 16px; border-bottom: 1px solid var(--line); }
+.tabbar { display: flex; gap: 6px; margin: 8px 0 16px; border-bottom: 1px solid #cbd5e1; }
-.tab { background: transparent; border: 0; border-bottom: 2px solid transparent; padding: 10px 14px; font: inherit; cursor: pointer; color: var(--muted); }
+.tab { background: transparent; border: 0; border-bottom: 3px solid transparent; padding: 10px 14px; font: inherit; cursor: pointer; color: var(--muted); border-radius: 8px 8px 0 0; }
-.tab:hover { color: var(--ink); }
+.tab:hover { color: var(--ink); background: #f8fafc; }
-.tab.on { color: var(--brand); border-bottom-color: var(--brand); font-weight: 600; }
+.tab.on { color: var(--brand); background: #eef4ff; border-bottom-color: var(--brand); font-weight: 700; }
 .instellingen > section { margin-top: 24px; padding-top: 8px; border-top: 1px dashed var(--line); }
 .instellingen > section:first-of-type { border-top: 0; }
 
@@ -441,19 +451,19 @@ input[type="color"] { padding: 2px; width: 44px; min-width: 44px; height: 38px;
 .chip-rij { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
 .chip-persoon { display: inline-flex; align-items: center; gap: 6px; padding: 3px 8px 3px 10px; border-radius: 999px; font-size: 12px; line-height: 1.6; cursor: grab; touch-action: none; user-select: none; border: 1px solid transparent; }
 .chip-persoon:active { cursor: grabbing; }
-.chip-persoon.mw { background: #3730a3; color: #fff; }          /* personeel: donker */
+.chip-persoon.mw { background: #334155; color: #fff; border-color: #334155; }          /* personeel: donker */
-.chip-persoon.ll { background: #dbeafe; color: #1e3a8a; border-color: #bfdbfe; }  /* leerling: licht */
+.chip-persoon.ll { background: #dbeafe; color: #1e3a8a; border-color: #93c5fd; }  /* leerling: licht */
 .chip-rol { font-size: 10px; font-weight: 700; opacity: .8; }
 .chip-x { border: 0; background: rgba(255,255,255,.25); color: inherit; border-radius: 999px; width: 16px; height: 16px; line-height: 14px; font-size: 13px; cursor: pointer; padding: 0; }
 .chip-persoon.ll .chip-x { background: rgba(30,58,138,.15); }
 .chip-x:hover { background: rgba(0,0,0,.25); }
 
-.bovengroep-kaart { border: 1px solid var(--line); border-left: 5px solid var(--brand); border-radius: 12px; background: var(--panel); padding: 10px 12px 12px; }
+.bovengroep-kaart { border: 1px solid var(--line); border-left: 5px solid var(--brand); border-radius: 12px; background: var(--panel); padding: 10px 12px 12px; box-shadow: 0 1px 2px rgba(15,23,42,.04); }
 .bovengroep-kaart.los { border-left-color: #f59e0b; }
 .groep-lijst { display: flex; flex-direction: column; gap: 10px; margin-top: 10px; padding-left: 12px; border-left: 2px dashed #c7d2fe; }
-.groep-kaart { border: 1px solid var(--line); border-left: 4px solid #0ea5e9; border-radius: 10px; background: #f8fbff; padding: 8px 10px 10px; }
+.groep-kaart { border: 1px solid #bae6fd; border-left: 4px solid #0ea5e9; border-radius: 10px; background: #f0f9ff; padding: 8px 10px 10px; }
 .sub-lijst { display: flex; flex-direction: column; gap: 8px; margin-top: 8px; padding-left: 12px; border-left: 2px dashed #bae6fd; }
-.subgroep-kaart { border: 1px solid var(--line); border-left: 3px solid #14b8a6; border-radius: 8px; background: #f0fdfa; padding: 6px 9px 8px; }
+.subgroep-kaart { border: 1px solid #99f6e4; border-left: 3px solid var(--accent); border-radius: 8px; background: #f0fdfa; padding: 6px 9px 8px; }
 
 .kaart-kop { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
 .bovengroep-kop strong { font-size: 16px; color: var(--brand); }
@@ -487,7 +497,7 @@ input[type="color"] { padding: 2px; width: 44px; min-width: 44px; height: 38px;
 .seg { border: 0; background: var(--panel); padding: 6px 12px; cursor: pointer; font: inherit; color: var(--ink); border-right: 1px solid var(--line); }
 .seg:last-child { border-right: 0; }
 .seg.on { background: var(--brand); color: #fff; }
-.selectie-bar { position: sticky; top: 8px; z-index: 20; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; background: var(--brand-soft); border: 1px solid var(--brand); border-radius: 10px; padding: 8px 12px; margin-bottom: 12px; }
+.selectie-bar { position: sticky; top: 8px; z-index: 20; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; background: var(--brand-soft); border: 1px solid var(--brand); border-left: 4px solid var(--brand); border-radius: 10px; padding: 8px 12px; margin-bottom: 12px; box-shadow: 0 2px 8px rgba(37,99,235,.12); }
 .selectie-bar select { min-width: 220px; }
 .chip-sel { border: 0; background: transparent; cursor: pointer; font-size: 13px; padding: 0; line-height: 1; color: inherit; }
 .chip-persoon.geselecteerd { outline: 2px solid var(--brand); outline-offset: 1px; }
@@ -558,16 +568,16 @@ input[type="color"] { padding: 2px; width: 44px; min-width: 44px; height: 38px;
 .keuze-picto { width: 48px; height: 48px; object-fit: contain; }
 .keuze-emoji { font-size: 40px; line-height: 1; }
 .bulk-invoer { width: 100%; font-family: monospace; font-size: 13px; padding: 10px; border: 1px solid var(--line); border-radius: 8px; }
-.banner.ok { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; padding: 10px 14px; border-radius: 8px; }
+.banner.ok { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; border-left: 4px solid var(--on); padding: 10px 14px; border-radius: 8px; }
 
 .chip.chip-plein { border-style: dashed; }
 
 /* Weekroostermaker (matrix: tijdvakken × klassen) */
 .wm-status { font-weight: 600; padding: 4px 10px; border-radius: 999px; font-size: 13px; }
-.wm-status.ok { background: #ecfdf5; color: #065f46; }
+.wm-status.ok { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
-.wm-status.fout { background: #fef2f2; color: #991b1b; }
+.wm-status.fout { background: var(--danger-soft); color: #991b1b; border: 1px solid #fecaca; }
 .wm-conflicten { background: #fef2f2; border: 1px solid #fca5a5; border-radius: 10px; padding: 10px 14px; margin: 0 0 14px; }
-.banner.waarschuwing { background: #fffbeb; color: #92400e; border: 1px solid #fcd34d; padding: 10px 14px; border-radius: 8px; }
+.banner.waarschuwing { background: var(--warn-soft); color: #92400e; border: 1px solid #fcd34d; border-left: 4px solid var(--warn); padding: 10px 14px; border-radius: 8px; }
 .wm-scroll { overflow-x: auto; border: 1px solid #cbd5e1; border-radius: 12px; background: #fff; }
 .wm-tabel { border-collapse: separate; border-spacing: 0; width: 100%; min-width: 720px; }
 .wm-tabel th, .wm-tabel td { border: 0; border-right: 1px solid #d8dee9; border-bottom: 1px solid #d8dee9; vertical-align: top; }
@@ -681,9 +691,9 @@ input[type="color"] { padding: 2px; width: 44px; min-width: 44px; height: 38px;
 
 /* "Genereren"-uitklap in de tabbalk (wizard + auto-rooster gebundeld) */
 .tab-dropdown { position: relative; }
-.tab-menu { position: absolute; left: 0; top: 100%; margin-top: 4px; background: var(--panel); border: 1px solid var(--line); border-radius: 10px; box-shadow: 0 10px 30px rgba(0,0,0,.15); min-width: 180px; padding: 6px; z-index: 60; display: flex; flex-direction: column; }
+.tab-menu { position: absolute; left: 0; top: 100%; margin-top: 4px; background: var(--panel); border: 1px solid #cbd5e1; border-radius: 10px; box-shadow: 0 10px 30px rgba(15,23,42,.16); min-width: 180px; padding: 6px; z-index: 60; display: flex; flex-direction: column; }
 .tab-menu-item { background: transparent; border: 0; text-align: left; padding: 8px 10px; border-radius: 8px; font: inherit; color: var(--ink); cursor: pointer; }
-.tab-menu-item:hover { background: var(--line); }
+.tab-menu-item:hover { background: #f1f5f9; }
 
 /* Conflict-melding direct boven het weekrooster + omlijning van betrokken blokken */
 .conflict-banner { border: 1px solid #fca5a5; background: #fef2f2; border-radius: 10px; margin: 0 0 14px; overflow: hidden; }