/* ---------- BASE ---------- */

body{
    margin:0;
    font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
    background:#f4f6fb;
    color:#111827;
}

a{
    color:#1f2a7a;
}

img{
    max-width:100%;
    height:auto;
}

table{
    width:100%;
    border-collapse:collapse;
}

/* ---------- HEADER ---------- */

.site-header{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    padding:14px 24px;
    border-bottom:1px solid #d7dfeb;
    background:#ffffff;
}

.logo-link{
    display:flex;
    align-items:center;
    text-decoration:none;
}

.logo-horizontal{
    display:block;
    height:42px;
    width:auto;
}

.logo-vertical{
    display:none;
    height:48px;
    width:auto;
}

.nav-menu{
    display:flex;
    gap:18px;
    flex-wrap:wrap;
    align-items:center;
}

.nav-menu a{
    text-decoration:none;
    font-weight:600;
    color:#1f2a7a;
    padding:8px 12px;
    border-radius:8px;
}

.nav-menu a:hover{
    background:#eef3fb;
}

.page-container{
    max-width:1200px;
    margin:0 auto;
    padding:24px;
}

/* ---------- BUTTON SYSTEM ---------- */

.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;

    padding:10px 18px;

    font-size:16px;
    font-weight:600;
    line-height:1;

    border-radius:12px;
    border:none;

    cursor:pointer;
    text-decoration:none;

    min-height:44px;

    box-sizing:border-box;
}

.btn-primary{
    background:#1f2a7a;
    color:#ffffff;
}

.btn-secondary{
    background:#f3f4f8;
    color:#1f2a7a;
    border:1px solid #d7dfeb;
}

.btn:hover{
    opacity:0.92;
}

/* ---------- FLASH ---------- */

.flash-message{
    padding:12px;
    border-radius:8px;
    margin-bottom:16px;
}

.flash-success{
    background:#e8f7e8;
    border:1px solid #b9dfb9;
}

.flash-error{
    background:#fdeaea;
    border:1px solid #f0b6b6;
}

.flash-info{
    background:#eef3f8;
    border:1px solid #cfd9e3;
}

/* ---------- PANELS ---------- */

.panel{
    border:1px solid #d7dfeb;
    border-radius:12px;
    background:#ffffff;
    padding:16px;
}

.panel-secondary{
    background:#fafbfd;
}

/* ---------- TABLES ---------- */

.details-table th,
.details-table td,
.loans-table th,
.loans-table td,
.edit-user-table th,
.edit-user-table td{
    border:1px solid #d7dfeb;
    padding:10px;
    text-align:left;
    vertical-align:top;
}

.details-table th,
.edit-user-table th{
    background:#f7f9fc;
    font-weight:600;
}

/* ---------- FORMS ---------- */

.user-form{
    max-width:520px;
    background:#ffffff;
    border:1px solid #d7dfeb;
    border-radius:12px;
    padding:20px;
}

.form-row{
    margin-bottom:16px;
}

.form-row label{
    display:block;
    margin-bottom:6px;
    font-weight:600;
}

.form-row input,
.form-row select,
.edit-user-table input,
.edit-user-table select{
    width:100%;
    padding:10px;
    box-sizing:border-box;
    font-size:16px;
}

.form-actions{
    margin-top:20px;
}

.auto-note{
    margin-top:8px;
    padding:12px;
    background:#f5f7fb;
    border:1px solid #dbe3ef;
    border-radius:8px;
    color:#4c5f7a;
    font-size:14px;
}

/* ---------- USERS INDEX ---------- */

.users-toolbar{
    margin-bottom:16px;
}

#userSearch{
    width:100%;
    max-width:420px;
    padding:14px 16px;
    font-size:18px;
    border:1px solid #c9d4e5;
    border-radius:12px;
    box-sizing:border-box;
    background:#fff;
}

.class-jump{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    margin-bottom:24px;
}

.class-jump-btn{
    padding:10px 14px;
    border:1px solid #b9c7dc;
    border-radius:999px;
    background:#ffffff;
    cursor:pointer;
    font-size:14px;
}

.class-jump-btn:hover{
    background:#edf3fb;
}

.class-section{
    margin-bottom:28px;
    padding:18px;
    background:#ffffff;
    border:1px solid #dbe4f0;
    border-radius:16px;
    box-shadow:0 2px 8px rgba(30,55,90,0.05);
}

.class-header{
    display:flex;
    justify-content:space-between;
    align-items:center;
    gap:12px;
    margin-bottom:16px;
}

.class-header h3{
    margin:0;
    font-size:24px;
    color:#16325c;
}

.class-count{
    font-size:13px;
    color:#5f728c;
    background:#eef3f9;
    padding:6px 10px;
    border-radius:999px;
    white-space:nowrap;
}

.users-grid{
    display:grid;
    grid-template-columns:repeat(auto-fill, minmax(120px, 1fr));
    gap:12px;
}

.user-card{
    display:flex;
    flex-direction:column;
    justify-content:center;
    align-items:center;
    min-height:76px;
    padding:10px 8px;
    border:1px solid #c9d7e8;
    border-radius:14px;
    background:#eaf2fb;
    color:#15305d;
    text-decoration:none;
    text-align:center;
    transition:transform 0.08s ease, background 0.15s ease, box-shadow 0.15s ease;
    box-shadow:0 1px 4px rgba(25,55,100,0.06);
}

.user-card:hover{
    background:#dce9f8;
    transform:translateY(-1px);
}

.user-card:active{
    transform:scale(0.98);
}

.user-first-name{
    font-size:20px;
    font-weight:700;
    line-height:1.05;
}

.user-last-name{
    margin-top:4px;
    font-size:12px;
    color:#4f6482;
    line-height:1.1;
}

.hidden-user{
    display:none;
}

.hidden-class{
    display:none;
}

/* ---------- USER SHOW ---------- */

.page-heading{
    display:flex;
    justify-content:space-between;
    align-items:flex-start;
    margin-bottom:18px;
    gap:16px;
}

.page-heading h2{
    margin:0;
    font-size:36px;
}

.user-meta{
    margin:4px 0 0;
    font-size:14px;
    color:#617089;
}

.page-actions{
    display:flex;
    gap:12px;
    flex-wrap:wrap;
}

.inline-form{
    margin:0;
}

.scan-panel{
    background:#ffffff;
    border:1px solid #d7dfeb;
    border-radius:12px;
    padding:16px;
    margin-bottom:20px;
}

.scan-form{
    display:flex;
    align-items:end;
    gap:12px;
    flex-wrap:wrap;
}

.scan-form label{
    font-weight:600;
    display:block;
}

#barcode{
    width:260px;
    padding:10px;
    font-size:18px;
    border:1px solid #cdd8e8;
    border-radius:8px;
}

.user-page-grid{
    display:grid;
    grid-template-columns:1.4fr 0.8fr;
    gap:20px;
}

.empty-state{
    color:#617089;
}

.overdue-row{
    background:#ffe2e2;
}

.overdue-label{
    color:red;
    margin-left:6px;
    font-size:12px;
}

/* ---------- EDIT USER ---------- */

.edit-user-form{
    max-width:760px;
}

.edit-user-table{
    background:#ffffff;
    border:1px solid #d7dfeb;
    border-radius:12px;
    overflow:hidden;
}

.edit-user-table th{
    width:180px;
}

/* ---------- RESPONSIVE ---------- */

@media (max-width:900px){
    .users-grid{
        grid-template-columns:repeat(auto-fill, minmax(105px, 1fr));
    }

    .user-card{
        min-height:72px;
    }

    .user-first-name{
        font-size:18px;
    }

    .class-header h3{
        font-size:22px;
    }

    .page-heading{
        flex-direction:column;
        align-items:flex-start;
    }

    .user-page-grid{
        grid-template-columns:1fr;
    }
}

@media (max-width:700px){
    .site-header{
        align-items:flex-start;
        flex-direction:column;
    }

    .logo-horizontal{
        display:none;
    }

    .logo-vertical{
        display:block;
    }
}

@media (max-width:600px){
    #userSearch{
        max-width:100%;
        font-size:16px;
    }

    .users-grid{
        grid-template-columns:repeat(3, 1fr);
    }

    .class-header{
        flex-direction:column;
        align-items:flex-start;
    }
}
.scan-section{
    margin-bottom:24px;
}

.scan-label{
    display:block;
    font-weight:600;
    margin-bottom:10px;
    font-size:18px;
}

.scan-row{
    display:flex;
    gap:12px;
    align-items:center;
}

.scan-input{
    flex:1;
    padding:14px 16px;
    font-size:18px;
    border-radius:10px;
    border:1px solid #c9d4e5;
}