:root {
    --nt-primary: #0d6efd;
    --nt-bg: #f0f2f5;
}

body { background-color: var(--nt-bg); }

/* Grade badges */
.badge-grade-1 { background-color: #198754; color: #fff; }
.badge-grade-2 { background-color: #0dcaf0; color: #000; }
.badge-grade-3 { background-color: #ffc107; color: #000; }
.badge-grade-4 { background-color: #fd7e14; color: #fff; }
.badge-grade-5 { background-color: #dc3545; color: #fff; }

/* Grade input */
.grade-input {
    width: 70px;
    text-align: center;
    font-size: 1.1rem;
    font-weight: 600;
}
.grade-input:focus { border-color: var(--nt-primary); box-shadow: 0 0 0 0.2rem rgba(13,110,253,.25); }
.grade-input.saved { border-color: #198754; }

/* Participation buttons */
.btn-plus  { min-width: 38px; }
.btn-minus { min-width: 38px; }
.participation-count { font-weight: 700; min-width: 24px; display: inline-block; text-align: center; }

/* Dashboard cards */
.stat-card { border-left: 4px solid var(--nt-primary); }
.stat-card.green { border-left-color: #198754; }
.stat-card.orange { border-left-color: #fd7e14; }
.stat-card.red { border-left-color: #dc3545; }

/* Table enhancements */
.table-grades th, .table-grades td { vertical-align: middle; }

/* Student login page */
.login-card { max-width: 420px; margin: auto; }
.ms-btn { background: #0078d4; border-color: #0078d4; }
.ms-btn:hover { background: #006cbd; border-color: #006cbd; }

/* Sidebar class selector */
.class-selector { max-height: 300px; overflow-y: auto; }

/* Report table */
.report-avg { font-weight: 700; background: #e8f4f8; }

/* Responsive nav fixes */
@media (max-width: 768px) {
    .grade-input { width: 58px; }
    .table-responsive { font-size: 0.85rem; }
}

/* Flash messages */
.flash { animation: fadeout 4s forwards; }
@keyframes fadeout { 0%,80% { opacity: 1; } 100% { opacity: 0; pointer-events: none; } }

/* ── Noteneingabe-Matrix (grades.php) ── */

/* Scrollbarer Container */
.grade-scroll-wrapper { overflow-x: auto; }

/* Sticky erste Spalte */
.grade-matrix .grade-sticky-col {
    position: sticky;
    left: 0;
    z-index: 2;
    background: #fff;
    border-right: 2px solid #dee2e6 !important;
    min-width: 160px;
    max-width: 200px;
}
.grade-matrix thead .grade-sticky-col {
    background: #f8f9fa;
    z-index: 3;
}

/* Kompakte Spaltenköpfe */
.grade-event-th  { min-width: 78px; max-width: 96px; }
.grade-event-name { font-size: .78rem; max-width: 80px; margin: 0 auto; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.grade-event-date { font-size: .7rem; color: #6c757d; }
.grade-avg-th    { min-width: 56px; background: #f0f6ff; }
.grade-avg-cell  { background: #f0f6ff; }

/* Noteninput */
.grade-input {
    width: 48px;
    text-align: center;
    font-size: .95rem;
    font-weight: 600;
    padding: 2px 4px;
    border-radius: 4px;
    border-color: #dee2e6;
    background: transparent;
    display: block;
    margin: 0 auto;
}
.grade-input:focus  { border-color: var(--nt-primary); box-shadow: 0 0 0 .15rem rgba(13,110,253,.2); background: #fff; }
.grade-input.is-valid   { border-color: #198754; }
.grade-input.is-invalid { border-color: #dc3545; }

/* Spinner ausblenden */
.grade-input::-webkit-inner-spin-button,
.grade-input::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }
.grade-input[type=number] { -moz-appearance: textfield; }

/* Zellfarben nach Note */
.grade-bg-1 { background-color: rgba(25,135,84,.10) !important; }
.grade-bg-2 { background-color: rgba(13,202,240,.10) !important; }
.grade-bg-3 { background-color: rgba(255,193,7,.12)  !important; }
.grade-bg-4 { background-color: rgba(253,126,20,.12) !important; }
.grade-bg-5 { background-color: rgba(220,53,69,.12)  !important; }

/* Winzige Buttons für Mitarbeit */
.btn-xs {
    font-size: .72rem;
    line-height: 1.3;
    padding: .1rem .35rem;
    border-radius: 3px;
}

/* Schüler-Suchfeld */
#studentSearch { min-width: 120px; }

@media (max-width: 768px) {
    .grade-matrix .grade-sticky-col { min-width: 110px; max-width: 130px; font-size: .82rem; }
    .grade-input { width: 42px; font-size: .85rem; }
    .grade-event-th { min-width: 64px; }
}

/* Class grid cards */
.class-card { transition: transform .15s, box-shadow .15s; }
.class-card:hover { transform: translateY(-3px); box-shadow: 0 .5rem 1rem rgba(0,0,0,.12) !important; }
.class-card-name { font-size: 1.6rem; letter-spacing: .02em; }

/* Student photo thumbnail */
.student-photo-thumb { width: 36px; height: 36px; object-fit: cover; }

/* Participation inline edit */
.part-count {
    cursor: pointer;
    text-decoration: underline dotted;
    text-underline-offset: 2px;
}
.part-edit-input {
    width: 46px;
    text-align: center;
    font-size: .82rem;
    font-weight: 700;
    padding: 1px 3px;
    border: 1px solid #0d6efd;
    border-radius: 3px;
    outline: none;
}
.part-edit-input::-webkit-inner-spin-button,
.part-edit-input::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }
.part-edit-input[type=number] { -moz-appearance: textfield; }

/* CSV import area */
.import-zone {
    border: 2px dashed #ced4da;
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    transition: border-color 0.2s;
    cursor: pointer;
}
.import-zone:hover, .import-zone.dragover { border-color: var(--nt-primary); background: #f0f6ff; }