:root{--vbz-action-blue:#2856ad;--vbz-action-blue-dark:#1e438e;--vbz-action-border:#bdcada;--vbz-action-danger:#aa2337;--vbz-action-danger-soft:#fff1f3;--vbz-action-success:#147453;--vbz-action-focus:#08a4df;--vbz-action-shadow:0 1px 2px rgba(19,45,74,.08),0 4px 12px rgba(19,45,74,.06);--vbz-menu-surface:#edf3f9;--vbz-menu-border:#c7d5e4;--vbz-menu-text:#405a72;--vbz-menu-hover:#fff;--vbz-menu-active:#2555ab;--vbz-menu-active-dark:#1d438e}
.button,.ki-interface .button{min-height:38px;padding:8px 14px;display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--vbz-action-border);border-radius:10px;color:#20354b;background:linear-gradient(180deg,#fff 0%,#f8fafc 100%);box-shadow:0 1px 2px rgba(19,45,74,.05);font-size:12px;font-weight:750;line-height:1.15;letter-spacing:.005em;text-decoration:none;transition:background-color .15s ease,border-color .15s ease,color .15s ease,box-shadow .15s ease,transform .15s ease}
.button:hover:not(:disabled),.ki-interface .button:hover:not(:disabled){border-color:#8fa6bf;background:#f3f7fc;box-shadow:var(--vbz-action-shadow);transform:translateY(-1px)}
.button:active:not(:disabled){transform:translateY(0);box-shadow:inset 0 1px 2px rgba(19,45,74,.12)}
.button.primary,.ki-interface .button.primary{color:#fff;border-color:var(--vbz-action-blue-dark);background:linear-gradient(180deg,#3265c3 0%,var(--vbz-action-blue) 100%);box-shadow:0 2px 5px rgba(40,86,173,.22)}
.button.primary:hover:not(:disabled),.ki-interface .button.primary:hover:not(:disabled){color:#fff;border-color:#173a7f;background:linear-gradient(180deg,#2b5ab1 0%,var(--vbz-action-blue-dark) 100%);box-shadow:0 5px 14px rgba(40,86,173,.25)}
.button.cyan,.ki-interface .button.cyan{color:#0a3049;border-color:#0995c9;background:linear-gradient(180deg,#38b8e7,#16a6dc)}
.button.cyan:hover:not(:disabled),.ki-interface .button.cyan:hover:not(:disabled){color:#082a40;border-color:#087da8;background:linear-gradient(180deg,#2bb0e1,#0d94c8)}
.button.success{color:#fff;border-color:#0f6548;background:linear-gradient(180deg,#1a8561,var(--vbz-action-success))}
.button.success:hover:not(:disabled){background:#105f45;border-color:#0c523b}
.button.danger,.ki-interface .button.danger{color:var(--vbz-action-danger);border-color:#e4a8b2;background:var(--vbz-action-danger-soft)}
.button.danger:hover:not(:disabled),.ki-interface .button.danger:hover:not(:disabled){color:#fff;border-color:#8f182c;background:var(--vbz-action-danger);box-shadow:0 4px 12px rgba(170,35,55,.18)}
.button.ghost{border-color:transparent;background:transparent;box-shadow:none}
.button.compact{min-height:32px;padding:6px 10px;border-radius:8px;font-size:11px}
.button[aria-busy="true"]{position:relative;padding-left:34px;cursor:progress}
.button[aria-busy="true"]::before{content:"";position:absolute;left:13px;width:12px;height:12px;border:2px solid currentColor;border-right-color:transparent;border-radius:50%;animation:vbz-button-spin .75s linear infinite}
.icon-button,.ki-interface .icon-button,.ki-icon-action{width:38px;min-width:38px;height:38px;padding:0;display:inline-grid;place-items:center;border:1px solid var(--vbz-action-border);border-radius:10px;color:#294c70;background:linear-gradient(180deg,#fff,#f6f9fc);box-shadow:0 1px 2px rgba(19,45,74,.05);transition:background-color .15s ease,border-color .15s ease,color .15s ease,box-shadow .15s ease,transform .15s ease}
.icon-button:hover:not(:disabled),.ki-icon-action:hover:not(:disabled){color:var(--vbz-action-blue);border-color:#8fa6bf;background:#eef5fd;box-shadow:var(--vbz-action-shadow);transform:translateY(-1px)}
.settings-tab,.segmented-control button{min-height:36px;padding:7px 13px;border:1px solid transparent;border-radius:8px;color:#506379;background:transparent;font-size:11px;font-weight:750;transition:background-color .15s ease,color .15s ease,border-color .15s ease,box-shadow .15s ease}
.settings-tab:hover:not(:disabled),.segmented-control button:hover:not(:disabled){color:#214e91;background:#eaf2fb}
.settings-tab.active,.segmented-control button.active{color:#fff;border-color:#234d9a;background:linear-gradient(180deg,#3265c3,#2856ad);box-shadow:0 2px 5px rgba(40,86,173,.2)}
.navigation-order-buttons button{width:34px;height:34px;border-color:#b6c7da;color:#245697;background:#fff;font-weight:850}
.navigation-order-buttons button:hover:not(:disabled){background:#eaf3fd;color:#153f78}

/* Einheitliche Reiter- und Ansichtsmenüs. Verhindert native Browser-/Windows-Buttons. */
:is(.segmented,.segmented-control,.operations-tabs,.lecturer-view-switch,.student-document-tabs,.ki-assistant-tabs){
  display:inline-flex;
  align-items:center;
  gap:5px;
  max-width:100%;
  padding:5px;
  overflow-x:auto;
  border:1px solid var(--vbz-menu-border);
  border-radius:14px;
  background:linear-gradient(180deg,#f6f9fc 0%,var(--vbz-menu-surface) 100%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.92),0 2px 8px rgba(27,55,84,.06);
  scrollbar-width:thin;
}
:is(.segmented,.segmented-control,.operations-tabs,.lecturer-view-switch,.student-document-tabs,.ki-assistant-tabs)>button,
.settings-tab,
.time-tab,
.azav-tabs>button,
.person-record-tabs>button,
.instructor-editor-tabs>.button{
  position:relative;
  min-height:38px;
  padding:8px 14px;
  appearance:none;
  -webkit-appearance:none;
  border:1px solid transparent;
  border-radius:10px;
  color:var(--vbz-menu-text);
  background:transparent;
  box-shadow:none;
  font:750 12px/1.15 inherit;
  letter-spacing:.005em;
  white-space:nowrap;
  cursor:pointer;
  transition:color .15s ease,background-color .15s ease,border-color .15s ease,box-shadow .15s ease,transform .15s ease;
}
:is(.segmented,.segmented-control,.operations-tabs,.lecturer-view-switch,.student-document-tabs,.ki-assistant-tabs)>button:hover:not(:disabled),
.settings-tab:hover:not(:disabled),
.time-tab:hover:not(:disabled),
.azav-tabs>button:hover:not(:disabled),
.person-record-tabs>button:hover:not(:disabled),
.instructor-editor-tabs>.button:hover:not(:disabled){
  color:#174878;
  border-color:#c2d3e4;
  background:var(--vbz-menu-hover);
  box-shadow:0 3px 10px rgba(25,57,88,.09);
  transform:translateY(-1px);
}
:is(.segmented,.segmented-control,.operations-tabs,.lecturer-view-switch,.student-document-tabs,.ki-assistant-tabs)>button.active,
:is(.segmented,.segmented-control,.operations-tabs,.lecturer-view-switch,.student-document-tabs,.ki-assistant-tabs)>button[aria-selected="true"],
.settings-tab.active,
.settings-tab[aria-selected="true"],
.time-tab.active,
.time-tab[aria-selected="true"],
.azav-tabs>button.active,
.azav-tabs>button[aria-selected="true"],
.person-record-tabs>button.active,
.person-record-tabs>button[aria-selected="true"],
.instructor-editor-tabs>.button.active,
.instructor-editor-tabs>.button[aria-selected="true"]{
  color:#fff;
  border-color:var(--vbz-menu-active-dark);
  background:linear-gradient(180deg,#356ac7 0%,var(--vbz-menu-active) 100%);
  box-shadow:0 4px 12px rgba(37,85,171,.24),inset 0 1px 0 rgba(255,255,255,.18);
}
.settings-tabs,.azav-tabs,.person-record-tabs,.instructor-editor-tabs,.time-tabs{
  gap:6px;
}
.settings-tabs:not(.settings-tabs-categorized),.azav-tabs,.time-tabs{
  border-color:var(--vbz-menu-border);
  background:linear-gradient(180deg,rgba(249,251,254,.98),rgba(237,243,249,.98));
}
.lecturer-framework-tabs>button{
  appearance:none;
  -webkit-appearance:none;
  transition:border-color .15s ease,background-color .15s ease,box-shadow .15s ease,transform .15s ease;
}
.lecturer-framework-tabs>button:hover:not(:disabled){
  border-color:#93abc3;
  background:#fff;
  box-shadow:var(--vbz-action-shadow);
  transform:translateY(-1px);
}
.nav-item,.ki-module-item{min-height:40px;border-radius:9px;transition:background-color .15s ease,color .15s ease,box-shadow .15s ease,transform .15s ease}
.nav-item:hover:not(:disabled),.ki-module-item:hover:not(:disabled){transform:translateX(2px)}
.nav-item>span,.ki-module-item>span{width:28px;height:28px;display:inline-grid;place-items:center;flex:0 0 28px;border-radius:8px;background:rgba(255,255,255,.075)}
.nav-item.active>span,.ki-module-item.active>span{background:rgba(255,255,255,.16);box-shadow:inset 0 0 0 1px rgba(255,255,255,.12)}
.vbz-navigation-icon{width:18px;height:18px;display:block;overflow:visible;pointer-events:none}
.ki-nav-group>summary>span .vbz-navigation-icon{width:16px;height:16px}
:where(button,[role="button"],a.button,input,select,textarea):focus-visible{outline:3px solid #58c6e9;outline:3px solid color-mix(in srgb,var(--vbz-action-focus) 62%,white);outline-offset:2px;box-shadow:0 0 0 2px #fff,0 0 0 5px rgba(8,164,223,.32)}
:where(button,.button,input,select,textarea):disabled{color:#8997a6!important;border-color:#d8e0e8!important;background:#eef2f5!important;box-shadow:none!important;opacity:1!important;cursor:not-allowed!important;transform:none!important}
@keyframes vbz-button-spin{to{transform:rotate(360deg)}}
@media(pointer:coarse),(max-width:760px){.button,.settings-tab,.segmented-control button,:is(.segmented,.operations-tabs,.lecturer-view-switch,.student-document-tabs,.ki-assistant-tabs)>button,.time-tab,.azav-tabs>button,.person-record-tabs>button,.instructor-editor-tabs>.button{min-height:44px}.icon-button,.ki-icon-action{width:44px;min-width:44px;height:44px}.nav-item,.ki-module-item{min-height:44px}}
@media(max-width:620px){:is(.segmented,.segmented-control,.operations-tabs,.lecturer-view-switch,.student-document-tabs,.ki-assistant-tabs){width:100%}:is(.segmented,.segmented-control,.operations-tabs,.lecturer-view-switch,.student-document-tabs,.ki-assistant-tabs)>button{flex:1 0 auto}}
@media(prefers-reduced-motion:reduce){.button,.icon-button,.ki-icon-action,.settings-tab,.segmented-control button,.nav-item,.ki-module-item,:is(.segmented,.operations-tabs,.lecturer-view-switch,.student-document-tabs,.ki-assistant-tabs)>button,.time-tab,.azav-tabs>button,.person-record-tabs>button,.instructor-editor-tabs>.button,.lecturer-framework-tabs>button{transition:none!important}.button:hover,.icon-button:hover,.ki-icon-action:hover,.nav-item:hover,.ki-module-item:hover,:is(.segmented,.operations-tabs,.lecturer-view-switch,.student-document-tabs,.ki-assistant-tabs)>button:hover,.time-tab:hover,.azav-tabs>button:hover,.person-record-tabs>button:hover,.instructor-editor-tabs>.button:hover,.lecturer-framework-tabs>button:hover{transform:none!important}.button[aria-busy="true"]::before{animation-duration:1.5s}}
@media(forced-colors:active){.button,.icon-button,.ki-icon-action,.settings-tab,.segmented-control button,.nav-item>span,.ki-module-item>span{border:1px solid ButtonText}.button.primary,.settings-tab.active,.segmented-control button.active{background:Highlight;color:HighlightText}}