:root{
    --brand-900:#00306f;
    --brand-800:#003b8a;
    --brand-700:#004aad;
    --brand-600:#0b63d6;
    --brand-500:#2b7bff;
    --bg-0:#ffffff;
    --bg-50:#f6f9ff;
    --bg-100:#eef4ff;
    --text-900:#0b1020;
    --text-700:#2b3554;
    --text-600:#46507a;
    --border:#e6eefc;
    --shadow-sm:0 10px 30px rgba(11,16,32,.08);
    --shadow-md:0 18px 60px rgba(11,16,32,.12);
    --radius-lg:18px;
    --bs-primary: var(--brand-700);
    --bs-primary-rgb: 0,74,173;
    --bs-link-color: var(--brand-700);
    --bs-link-hover-color: var(--brand-600);
}

html,body{height:100%}
body{
    font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
    color:var(--text-900);
    background:
        radial-gradient(900px 500px at 10% -10%, rgba(43,123,255,.22), transparent 60%),
        radial-gradient(800px 450px at 90% 10%, rgba(0,74,173,.18), transparent 55%),
        linear-gradient(180deg, var(--bg-0) 0%, var(--bg-50) 55%, #ffffff 100%);
    -webkit-font-smoothing:antialiased;
    -moz-osx-font-smoothing:grayscale;
}

a{color:inherit}

.text-primary{color:var(--brand-700)!important}
.text-muted{color:var(--text-600)!important}

.navbar-glass{
    background:rgba(255,255,255,.72);
    backdrop-filter:blur(14px);
    border-bottom:1px solid rgba(230,238,252,.9);
}

.navbar-glass .navbar-brand{color:var(--text-900)}
.navbar-glass .navbar-toggler{border-color:rgba(11,16,32,.12)}
.navbar-glass .navbar-toggler-icon{filter:invert(0)}

.navbar-glass .nav-link{
    color:rgba(11,16,32,.75);
    font-weight:600;
    padding:.55rem .8rem;
    border-radius:999px;
}
.navbar-glass .nav-link:hover{background:rgba(0,74,173,.06);color:var(--text-900)}
.navbar-glass .nav-link.active{background:rgba(0,74,173,.10);color:var(--brand-700)}

.brand-mark{
    width:42px;height:42px;border-radius:12px;
    background:linear-gradient(135deg, var(--brand-700), var(--brand-500));
    color:#fff;
    box-shadow:0 12px 30px rgba(43,123,255,.25);
}
.brand-mark i{font-size:20px}
.brand-title{font-size:1rem;letter-spacing:-.02em}
.brand-subtitle{font-size:.78rem;color:rgba(11,16,32,.55);font-weight:600}

.btn-brand{
    background:linear-gradient(135deg, var(--brand-700), var(--brand-500));
    border:0;
    color:#fff;
    border-radius:999px;
    box-shadow:0 14px 40px rgba(43,123,255,.25);
    transition:transform .18s ease, box-shadow .18s ease, filter .18s ease;
}
.btn-brand:hover{
    color:#fff;
    transform:translateY(-1px);
    box-shadow:0 18px 56px rgba(43,123,255,.30);
    filter:saturate(1.05);
}
.btn-brand:active{transform:translateY(0)}

.btn-soft{
    border-radius:999px;
    border:1px solid rgba(0,74,173,.18);
    background:rgba(255,255,255,.7);
    color:var(--brand-700);
    font-weight:700;
}
.btn-soft:hover{background:rgba(0,74,173,.06);color:var(--brand-800)}

.section{padding:72px 0}
.section-tight{padding:52px 0}

.hero{
    padding:64px 0 54px 0;
    position:relative;
    overflow:hidden;
}
.hero::before{
    content:"";
    position:absolute;
    inset:-2px;
    background:
        radial-gradient(500px 240px at 20% 10%, rgba(43,123,255,.16), transparent 60%),
        radial-gradient(500px 280px at 80% 0%, rgba(0,74,173,.16), transparent 60%);
    pointer-events:none;
}
.hero .container{position:relative}

.hero-title{
    letter-spacing:-.04em;
    line-height:1.06;
}
.hero-lead{color:var(--text-700);font-size:1.08rem}

.pill{
    display:inline-flex;
    align-items:center;
    gap:.5rem;
    padding:.5rem .8rem;
    border-radius:999px;
    background:rgba(255,255,255,.75);
    border:1px solid rgba(230,238,252,.95);
    box-shadow:0 10px 30px rgba(11,16,32,.06);
    font-weight:700;
    color:rgba(11,16,32,.75);
}
.pill i{color:var(--brand-600)}

.surface{
    background:rgba(255,255,255,.78);
    border:1px solid rgba(230,238,252,.95);
    border-radius:var(--radius-lg);
    box-shadow:var(--shadow-sm);
}
.surface-hover{transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease}
.surface-hover:hover{
    transform:translateY(-3px);
    box-shadow:var(--shadow-md);
    border-color:rgba(0,74,173,.18);
}

.icon-tile{
    width:44px;height:44px;border-radius:14px;
    display:flex;align-items:center;justify-content:center;
    background:linear-gradient(135deg, rgba(0,74,173,.10), rgba(43,123,255,.10));
    border:1px solid rgba(0,74,173,.12);
    color:var(--brand-700);
}
.icon-tile i{font-size:20px}

.kpi{
    display:flex;
    align-items:center;
    gap:.85rem;
    padding:14px 16px;
    border-radius:16px;
    background:rgba(255,255,255,.78);
    border:1px solid rgba(230,238,252,.95);
}
.kpi strong{font-size:1.15rem}
.kpi span{color:var(--text-600);font-weight:600;font-size:.92rem}

.badge-soft{
    background:rgba(0,74,173,.10);
    color:var(--brand-800);
    border:1px solid rgba(0,74,173,.14);
    font-weight:800;
}

.list-check{
    list-style:none;
    padding-left:0;
    margin:0;
}
.list-check li{
    display:flex;
    align-items:flex-start;
    gap:.6rem;
    padding:.4rem 0;
    color:var(--text-700);
    font-weight:600;
}
.list-check i{color:var(--brand-600)}

.site-footer{
    background:linear-gradient(180deg, #0b1020 0%, #070b16 100%);
}
.footer-title{
    color:#fff;
    font-weight:800;
    margin-bottom:.75rem;
    letter-spacing:-.02em;
}
.footer-links a{
    display:inline-flex;
    padding:.25rem 0;
    color:rgba(255,255,255,.65);
    text-decoration:none;
    font-weight:600;
}
.footer-links a:hover{color:#fff}
.border-white-10{border-color:rgba(255,255,255,.10)!important}
.icon-btn{
    width:40px;height:40px;border-radius:12px;
    display:inline-flex;align-items:center;justify-content:center;
    background:rgba(255,255,255,.08);
    border:1px solid rgba(255,255,255,.10);
    color:#fff;
    text-decoration:none;
    transition:transform .18s ease, background .18s ease;
}
.icon-btn:hover{background:rgba(255,255,255,.12);transform:translateY(-1px);color:#fff}
.footer-card{
    padding:16px;
    border-radius:18px;
    background:rgba(255,255,255,.06);
    border:1px solid rgba(255,255,255,.10);
}
.footer-badge{
    width:38px;height:38px;border-radius:12px;
    background:rgba(43,123,255,.22);
    border:1px solid rgba(43,123,255,.28);
    display:flex;align-items:center;justify-content:center;
    color:#fff;
}

.form-control,.form-select{
    border-radius:14px;
    border:1px solid rgba(230,238,252,.95);
    padding:.9rem 1rem;
}
.form-control:focus,.form-select:focus{
    border-color:rgba(43,123,255,.55);
    box-shadow:0 0 0 .25rem rgba(43,123,255,.14);
}

.accordion{
    --bs-accordion-bg: transparent;
    --bs-accordion-border-color: transparent;
    --bs-accordion-btn-bg: transparent;
    --bs-accordion-btn-focus-box-shadow: none;
    --bs-accordion-active-bg: rgba(0,74,173,.08);
    --bs-accordion-active-color: var(--brand-800);
}
.accordion-button{
    border-radius:14px!important;
    color:var(--text-900);
}
.accordion-button:not(.collapsed){box-shadow:none}
.accordion-item+.accordion-item{margin-top:.5rem}

.admin-shell{background:var(--bg-50);overflow:hidden}
.admin-topbar{
    position:sticky;
    top:0;
    z-index:1040;
    border-bottom:1px solid rgba(230,238,252,.9);
}
.admin-topbar-inner{min-height:56px}
@media (min-width: 992px){
    .admin-topbar{display:none}
}
.admin-layout{min-height:0}
.admin-sidebar{
    width:300px;
    height:100%;
    border-right:1px solid rgba(230,238,252,.95);
    background:rgba(255,255,255,.82);
    backdrop-filter:blur(14px);
}
.admin-sidebar .offcanvas-body{height:100%}
.admin-sidebar-inner{
    height:100%;
    display:flex;
    flex-direction:column;
    padding:16px;
    gap:16px;
    overflow:hidden;
}
.admin-brand{
    text-decoration:none;
    padding:10px 10px;
    border-radius:16px;
    background:rgba(255,255,255,.75);
    border:1px solid rgba(230,238,252,.95);
    box-shadow:0 10px 30px rgba(11,16,32,.06);
}
.admin-nav{
    display:flex;
    flex-direction:column;
    gap:6px;
    flex:1 1 auto;
    overflow:auto;
    padding-right:6px;
}
.admin-nav-link{
    display:flex;
    align-items:center;
    padding:10px 12px;
    border-radius:14px;
    color:rgba(11,16,32,.78);
    text-decoration:none;
    font-weight:700;
}
.admin-nav-link:hover{background:rgba(0,74,173,.06);color:var(--text-900)}
.admin-nav-link.active{
    background:linear-gradient(135deg, rgba(0,74,173,.12), rgba(43,123,255,.10));
    border:1px solid rgba(0,74,173,.16);
    color:var(--brand-800);
}
.admin-nav-link.danger{color:rgba(176, 20, 20, .86)}
.admin-nav-link.danger:hover{background:rgba(176, 20, 20, .06);color:rgba(176, 20, 20, 1)}
.admin-sidebar-footer{
    margin-top:auto;
    padding:0;
    border-radius:0;
    background:transparent;
    border:0;
    display:flex;
    flex-direction:column;
    gap:6px;
}
.admin-content{min-width:0;min-height:0;overflow:auto}

.card{border:0}

.grade-cell{position:relative}
.grade-fx-badge{
    position:absolute;
    right:0;
    top:-10px;
    padding:8px 10px;
    border-radius:14px;
    background:rgba(0,74,173,.12);
    border:1px solid rgba(0,74,173,.18);
    color:var(--brand-800);
    font-weight:800;
    transform:translateY(6px);
    animation:gradeFloat 1.1s ease-out forwards;
    pointer-events:none;
    white-space:nowrap;
}
@keyframes gradeFloat{
    0%{opacity:0;transform:translateY(10px) scale(.98)}
    20%{opacity:1;transform:translateY(0) scale(1)}
    100%{opacity:0;transform:translateY(-20px) scale(1.02)}
}

.coin-toast-overlay{
    position:fixed;
    inset:0;
    display:flex;
    align-items:center;
    justify-content:center;
    z-index:2000;
    pointer-events:none;
    opacity:0;
    transition:opacity .18s ease-out;
}
.coin-toast-overlay.show{opacity:1}
.coin-toast{
    width:min(320px, 86vw);
    padding:18px 18px 16px;
    border-radius:22px;
    background:rgba(255,255,255,.92);
    border:1px solid rgba(230,238,252,.95);
    box-shadow:0 24px 70px rgba(11,16,32,.22);
    backdrop-filter:blur(12px);
    text-align:center;
    transform:translateY(10px) scale(.96);
    opacity:0;
    animation:coinToastIn .24s ease-out forwards;
}
.coin-toast-overlay.show .coin-toast{
    opacity:1;
    transform:translateY(0) scale(1);
}
.coin-toast-img{
    width:120px;
    height:120px;
    display:block;
    margin:0 auto 8px;
    transform:translateY(0) rotateZ(-2deg);
    animation:coinBounce 1.1s cubic-bezier(.2,.75,.3,1) forwards;
    filter:drop-shadow(0 16px 24px rgba(0,0,0,.18));
}
.coin-toast-text{
    font-weight:900;
    letter-spacing:-.02em;
    font-size:40px;
    color:var(--brand-800);
    line-height:1;
}
.coin-toast-sub{
    margin-top:6px;
    font-weight:800;
    color:rgba(11,16,32,.72);
}
@keyframes coinToastIn{
    0%{opacity:0;transform:translateY(14px) scale(.94)}
    100%{opacity:1;transform:translateY(0) scale(1)}
}
@keyframes coinBounce{
    0%{transform:translateY(14px) scale(.92) rotateZ(-6deg)}
    35%{transform:translateY(-6px) scale(1.04) rotateZ(2deg)}
    70%{transform:translateY(2px) scale(1) rotateZ(-1deg)}
    100%{transform:translateY(0) scale(1) rotateZ(0deg)}
}

.attendance-radio{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
    justify-content:flex-end;
}
.attendance-radio-input{
    position:absolute;
    width:1px;
    height:1px;
    overflow:hidden;
    clip:rect(0 0 0 0);
    white-space:nowrap;
    clip-path:inset(50%);
}
.attendance-radio-pill{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    padding:8px 10px;
    border-radius:999px;
    font-weight:800;
    border:1px solid rgba(230,238,252,.95);
    background:rgba(255,255,255,.7);
    color:rgba(11,16,32,.74);
    cursor:pointer;
    transition:transform .08s ease-out, background .12s ease-out, border-color .12s ease-out, color .12s ease-out;
    user-select:none;
}
.attendance-radio-pill:hover{transform:translateY(-1px)}
.attendance-radio-input:focus-visible + .attendance-radio-pill{
    box-shadow:0 0 0 .25rem rgba(43,123,255,.14);
    border-color:rgba(43,123,255,.45);
}
.attendance-radio-input:checked + .attendance-radio-pill{
    border-color:transparent;
    color:#0b1020;
}
.attendance-radio-input:checked + .attendance-radio-pill.present{background:rgba(34,197,94,.18)}
.attendance-radio-input:checked + .attendance-radio-pill.late{background:rgba(245,158,11,.20)}
.attendance-radio-input:checked + .attendance-radio-pill.excused{background:rgba(59,130,246,.18)}
.attendance-radio-input:checked + .attendance-radio-pill.absent{background:rgba(239,68,68,.18)}