:root {
    --spf-gold:        #B28E5C;
    --spf-gold-dark:   #9a7849;
    --spf-gold-light:  #c9a97a;
    --spf-sidebar-bg:  #1a1a1a;
    --spf-sidebar-w:   260px;
    --spf-text:        #2d2d2d;
}

/* ─── Layout ─── */
body { font-family: 'Inter', system-ui, sans-serif; color: var(--spf-text); background: #f5f5f5; }
.spf-sidebar {
    width: var(--spf-sidebar-w);
    min-height: 100vh;
    background: var(--spf-sidebar-bg);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: 100;
    transition: transform .3s;
}
.spf-main {
    margin-left: var(--spf-sidebar-w);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
.spf-content { flex: 1; padding: 24px; }

/* ─── Logo ─── */
.spf-logo-area {
    padding: 20px 20px 10px;
    border-bottom: 1px solid #333;
    text-decoration: none;
    display: block;
}
.spf-logo-area img { height: 36px; filter: brightness(0) invert(1); opacity: .9; }
.spf-logo-text {
    color: #fff;
    font-size: 11px;
    line-height: 1.4;
    margin-top: 6px;
    opacity: .6;
}

/* ─── Sidebar nav ─── */
.spf-nav { padding: 12px 0; flex: 1; overflow-y: auto; }
.spf-nav-section { padding: 12px 20px 4px; font-size: 10px; text-transform: uppercase; letter-spacing: 1px; color: #666; }
.spf-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 20px;
    color: #ccc;
    text-decoration: none;
    font-size: 14px;
    transition: background .15s, color .15s;
    border-left: 3px solid transparent;
}
.spf-nav a:hover   { background: #2a2a2a; color: #fff; }
.spf-nav a.active  { background: #2a2a2a; color: var(--spf-gold); border-left-color: var(--spf-gold); }
.spf-nav a svg     { width: 16px; height: 16px; flex-shrink: 0; opacity: .7; }
.spf-nav a:hover svg, .spf-nav a.active svg { opacity: 1; }

/* ─── Sidebar footer ─── */
.spf-sidebar-footer {
    padding: 14px 20px;
    border-top: 1px solid #333;
    font-size: 13px;
    color: #888;
}
.spf-sidebar-footer .spf-user-name { color: #ddd; font-weight: 500; display: block; }
.spf-sidebar-footer .spf-role-badge {
    display: inline-block;
    background: var(--spf-gold);
    color: #fff;
    font-size: 10px;
    padding: 1px 7px;
    border-radius: 10px;
    margin-top: 3px;
}

/* ─── Topbar ─── */
.spf-topbar {
    background: #fff;
    border-bottom: 1px solid #e8e8e8;
    padding: 0 24px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 50;
}
.spf-topbar h1 { font-size: 18px; font-weight: 600; margin: 0; }
.spf-topbar-right { display: flex; align-items: center; gap: 12px; }

/* ─── Buttons ─── */
.btn-spf {
    background: var(--spf-gold);
    color: #fff;
    border: none;
    padding: 8px 20px;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    text-decoration: none;
    transition: background .15s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.btn-spf:hover { background: var(--spf-gold-dark); color: #fff; }
.btn-spf-outline {
    background: transparent;
    color: var(--spf-gold);
    border: 1px solid var(--spf-gold);
    padding: 7px 18px;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    text-decoration: none;
    transition: all .15s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.btn-spf-outline:hover { background: var(--spf-gold); color: #fff; }
.btn-sm { padding: 4px 12px !important; font-size: 13px !important; }

/* ─── Cards ─── */
.spf-card {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 1px 4px rgba(0,0,0,.08);
    padding: 20px 24px;
    margin-bottom: 20px;
}
.spf-card-title { font-size: 15px; font-weight: 600; margin-bottom: 16px; color: var(--spf-text); }

/* ─── Stats cards ─── */
.stat-card {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 1px 4px rgba(0,0,0,.08);
    padding: 20px;
    border-left: 4px solid var(--spf-gold);
}
.stat-card .stat-value { font-size: 32px; font-weight: 700; color: var(--spf-gold); }
.stat-card .stat-label { font-size: 13px; color: #777; margin-top: 2px; }

/* ─── Tables ─── */
.spf-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.spf-table th {
    background: #f8f6f2;
    color: #666;
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: .5px;
    padding: 10px 14px;
    text-align: left;
    border-bottom: 2px solid #e8e4dc;
}
.spf-table td { padding: 11px 14px; border-bottom: 1px solid #f0ede8; vertical-align: middle; }
.spf-table tr:last-child td { border-bottom: none; }
.spf-table tr:hover td { background: #fdf9f4; }

/* ─── Badges ─── */
.badge-role-admin   { background: #fef3e2; color: #a06020; }
.badge-role-teacher { background: #e8f4fd; color: #1a6fa0; }
.badge-role-student { background: #edfaf3; color: #1a8050; }
.badge-role-none    { background: #f5f5f5; color: #888; }
.badge-role {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

/* ─── Filters ─── */
.spf-filters {
    background: #fff;
    border-radius: 10px;
    padding: 14px 20px;
    margin-bottom: 16px;
    box-shadow: 0 1px 4px rgba(0,0,0,.06);
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: flex-end;
}
.spf-filters .form-control,
.spf-filters .form-select { font-size: 14px; height: 38px; border-color: #ddd; }
.spf-filters .form-control:focus,
.spf-filters .form-select:focus { border-color: var(--spf-gold); box-shadow: 0 0 0 2px rgba(178,142,92,.15); }

/* ─── Forms ─── */
.form-label { font-size: 13px; font-weight: 500; margin-bottom: 4px; color: #444; }
.form-control, .form-select {
    border-radius: 6px;
    border-color: #ddd;
    font-size: 14px;
}
.form-control:focus, .form-select:focus {
    border-color: var(--spf-gold);
    box-shadow: 0 0 0 3px rgba(178,142,92,.15);
}
.invalid-feedback { font-size: 12px; }

/* ─── Auth pages ─── */
.auth-wrap {
    min-height: 100vh;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.auth-card {
    background: #fff;
    border-radius: 14px;
    padding: 40px 36px;
    width: 100%;
    max-width: 440px;
    box-shadow: 0 20px 60px rgba(0,0,0,.3);
}
.auth-logo { text-align: center; margin-bottom: 24px; }
.auth-logo img { height: 44px; }
.auth-title { font-size: 22px; font-weight: 700; text-align: center; margin-bottom: 24px; color: var(--spf-text); }
.auth-footer-link { color: var(--spf-gold); text-decoration: none; }
.auth-footer-link:hover { color: var(--spf-gold-dark); }

/* ─── Grade table ─── */
.grade-input {
    width: 100px;
    text-align: center;
    border: 1px solid #ddd;
    border-radius: 6px;
    padding: 4px 8px;
    font-size: 14px;
}
.grade-input:focus { border-color: var(--spf-gold); outline: none; box-shadow: 0 0 0 2px rgba(178,142,92,.15); }
.grade-badge {
    display: inline-block;
    background: #fef3e2;
    color: #a06020;
    border-radius: 6px;
    padding: 3px 10px;
    font-size: 13px;
    font-weight: 500;
    min-width: 60px;
    text-align: center;
}
.grade-pass {
    background: #edfaf3;
    color: #1a8050;
}
.grade-empty {
    background: #f5f5f5;
    color: #bbb;
}

/* ─── Alert status ─── */
.alert-spf {
    background: #fef3e2;
    border: 1px solid #f0d9b0;
    color: #7a5820;
    border-radius: 8px;
    padding: 12px 16px;
    font-size: 14px;
    margin-bottom: 16px;
}

/* ─── Nav group (раскрывающийся) ─── */
.spf-nav-group-toggle {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 9px 20px;
    background: none;
    border: none;
    border-left: 3px solid transparent;
    color: #ccc;
    font-size: 14px;
    cursor: pointer;
    transition: background .15s, color .15s;
    text-align: left;
}
.spf-nav-group-toggle:hover { background: #2a2a2a; color: #fff; }
.spf-nav-group-toggle.active { color: var(--spf-gold); background: #222; border-left-color: var(--spf-gold); }
.spf-nav-group-toggle[aria-expanded="true"] .spf-chevron { transform: rotate(180deg); }

.spf-nav-group { overflow: hidden; }
.spf-nav-group a { padding-left: 36px; font-size: 13px; }

/* ─── Mobile sidebar toggle ─── */
.sidebar-toggle { display: none; }

@media (max-width: 768px) {
    .spf-sidebar { transform: translateX(-100%); }
    .spf-sidebar.open { transform: translateX(0); }
    .spf-main { margin-left: 0; }
    .sidebar-toggle { display: flex; }
}

/* ─── Pagination ─── */
.pagination { margin: 0; }
.page-link {
    color: var(--spf-gold);
    border-color: #e8e4dc;
    font-size: 13px;
    padding: 5px 11px;
}
.page-link:hover { color: var(--spf-gold-dark); background: #fdf9f4; border-color: #e8e4dc; }
.page-item.active .page-link {
    background: var(--spf-gold);
    border-color: var(--spf-gold);
    color: #fff;
}
.page-item.disabled .page-link { color: #ccc; border-color: #e8e4dc; }

/* ─── No-role screen ─── */
.no-role-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    text-align: center;
    color: #888;
}
.no-role-icon { font-size: 64px; margin-bottom: 16px; opacity: .4; }

.btn-spf-complete { background: #2f9e44; }
.btn-spf-complete:hover { background: #2b8a3e; }