*{box-sizing:border-box}body{margin:0;font:16px/1.5 system-ui,Segoe UI,Arial,sans-serif;color:#152138;background:#f5f7fb}a{color:#155bd4}button,input,select{font:inherit}button{background:#1859ba;color:white;border:0;border-radius:7px;padding:9px 14px;cursor:pointer}button:hover{background:#13468f}button:disabled{opacity:.4;cursor:default}input,select{border:1px solid #b9c4d6;padding:8px 10px;border-radius:7px;min-width:0}.top{min-height:64px;background:#0c2444;color:white;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:12px 25px}.brand{color:white;text-decoration:none;font-weight:700}.container{max-width:1200px;margin:auto;padding:25px}.catalog{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px;margin-top:22px}.bookcard,.searchpanel{padding:23px;background:white;border:1px solid #e1e7f0;border-radius:13px;box-shadow:0 4px 20px #13356209}.bookcard h2{margin:.5em 0}.bookcard a{display:inline-block;margin-top:12px;background:#1859ba;color:white;padding:9px 13px;border-radius:8px;text-decoration:none}.book-icon{font-size:40px}.searchbar{display:flex;gap:8px;margin:10px 0}.searchbar input{flex:1;width:100%}.reader{display:grid;grid-template-columns:320px minmax(0,1fr);height:calc(100dvh - 64px)}.sidebar{background:white;border-right:1px solid #dae2ec;padding:17px;overflow:auto}.sidebar h2{font-size:20px}.sidebar nav{max-height:38vh;overflow:auto}.sidebar nav a{display:block;padding:4px 5px;text-decoration:none;border-radius:4px}.sidebar nav a:hover,.hit:hover{background:#eef3fc}.viewer{display:flex;min-width:0;flex-direction:column}.toolbar{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:9px;padding:10px;background:white;border-bottom:1px solid #d9e2ee}.toolbar input{width:85px}.image-stage{flex:1;min-height:0;overflow:auto;text-align:center;padding:16px}.image-stage img{display:block;margin:auto;max-width:100%;height:auto;box-shadow:0 5px 24px #0002;background:white;user-select:none}.image-stage img.expanded{max-width:none}.image-stage p{margin:10px}.hit{padding:10px 5px;border-bottom:1px solid #e8eef6}.hit a{font-weight:600}.hit small{display:block;color:#52627c;margin-top:4px;word-break:break-word}.error{color:#b42318}.muted{color:#61718b}@media(max-width:850px){.reader{display:block;height:auto}.sidebar{border-right:0;border-bottom:1px solid #dae2ec}.sidebar nav{max-height:180px}.image-stage{height:72dvh}.top{padding:10px 14px}.container{padding:16px}.toolbar{justify-content:flex-start}.sidebar{padding:12px}}


/* Stage 3E.3-B - UI Polish v1.3 */

/* Login */
.login-card {
    width: 100%;
    max-width: 460px;
    margin: 10vh auto;
    padding: 30px 32px;
    border-radius: 16px;
}

.login-card h1 {
    margin: 0 0 14px;
    line-height: 1.25;
}

.login-card form {
    margin-top: 22px;
}

.login-card form p {
    margin: 0 0 18px;
}

.login-card label {
    display: block;
    font-weight: 600;
}

.login-card label input {
    display: block;
    width: 100%;
    min-height: 46px;
    margin-top: 7px;
    padding: 10px 12px;
    font-size: 16px;
}

.login-card button {
    min-height: 44px;
    padding: 10px 22px;
}

/* Book catalog */
.catalog {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr));
    gap: 20px;
    align-items: stretch;
}

.bookcard {
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 350px;
    padding: 24px 20px;
    border-radius: 15px;
    box-shadow: 0 3px 12px rgba(19, 53, 98, 0.06);
}

.bookcard .book-icon {
    line-height: 1.2;
    margin-bottom: 14px;
}

.bookcard h2 {
    margin: 0 0 16px;
    font-size: 19px;
    line-height: 1.4;
    overflow-wrap: anywhere;
}

.bookcard .book-author {
    margin: 0 0 8px;
    color: #44546a;
    font-size: 15px;
}

.bookcard .book-pages {
    margin: 0 0 20px;
    color: #61718b;
    font-size: 14px;
}

.bookcard .book-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    align-self: flex-start;
    min-height: 44px;
    margin-top: auto;
    padding: 10px 15px;
    text-align: center;
}

@media (max-width: 600px) {
    .login-card {
        margin: 6vh auto;
        padding: 24px 20px;
    }

    .catalog {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .bookcard {
        min-height: 0;
    }

    .bookcard .book-action {
        margin-top: 20px;
    }
}


/* LeOn v1.3.2.1 - navigation */
.nav-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 9px 14px;
    border-radius: 7px;
    background: #1859ba;
    color: #fff;
    text-decoration: none;
    font-weight: 500;
}
.nav-button:hover {
    background: #13468f;
    color: #fff;
}
.nav-button:focus-visible {
    outline: 3px solid #f1b84b;
    outline-offset: 3px;
}
.top .nav-button {
    flex-shrink: 0;
}
.back-button::before {
    content: "\2190";
    margin-right: 8px;
}
@media (max-width: 600px) {
    .top {
        flex-wrap: wrap;
    }
}


/* LeOn v1.3.2.2 - grouped navigation */
.top-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    margin-left: auto;
    flex-shrink: 0;
}
.top-actions form {
    margin: 0;
}
.top-actions .nav-button,
.top-actions button {
    min-height: 42px;
    box-sizing: border-box;
}
@media (max-width: 600px) {
    .top-actions {
        margin-left: 0;
        width: 100%;
        justify-content: flex-end;
        flex-wrap: wrap;
    }
}


/* LeOn v1.3.2.2 - admin form alignment */

.admin-form,
.admin-student-batch {
    --admin-label-width: 210px;
    --admin-field-gap: 16px;
}

.admin-form > p:has(> label),
.admin-student-batch > p:has(> label) {
    margin: 0 0 14px;
}

.admin-form > p > label,
.admin-student-batch > p > label {
    display: grid;
    grid-template-columns: 210px minmax(0, 1fr);
    column-gap: 16px;
    row-gap: 6px;
    align-items: center;
    font-weight: 400;
}

.admin-form > p > label > input,
.admin-form > p > label > select,
.admin-student-batch > p > label > input,
.admin-student-batch > p > label > select {
    display: block;
    width: min(100%, 340px);
    min-width: 0;
    min-height: 42px;
    margin: 0;
    box-sizing: border-box;
}

.admin-form input[type="date"] {
    width: min(100%, 210px);
}

.admin-form input[type="file"] {
    width: min(100%, 440px);
}

.admin-field-help {
    display: block;
    grid-column: 2;
    font-size: 12px;
    color: #607089;
    font-weight: 400;
}

.admin-form > .admin-action-button,
.admin-student-batch .admin-action-button {
    margin-left: 226px;
}

.admin-action-button {
    width: min(100%, 340px);
    min-height: 42px;
    box-sizing: border-box;
    justify-content: center;
}

.admin-table-wrap {
    max-width: 100%;
    overflow-x: auto;
    margin: 16px 0;
}

.admin-students-table {
    width: 100%;
    min-width: 850px;
    border-collapse: collapse;
}

.admin-students-table th,
.admin-students-table td {
    vertical-align: middle;
    text-align: left;
}

.admin-students-table th:first-child,
.admin-students-table td:first-child {
    width: 62px;
    text-align: center;
}

.admin-students-table input[type="checkbox"] {
    display: block;
    width: 18px;
    height: 18px;
    min-height: 0;
    margin: 0 auto;
}

.admin-students-table td:nth-child(2),
.admin-students-table td:nth-child(6),
.admin-students-table td:nth-child(7) {
    white-space: nowrap;
}

.admin-rate-form {
    display: grid;
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 14px 16px;
    align-items: center;
}

.admin-rate-form > label {
    font-weight: 400;
}

.admin-rate-form > input#user_id {
    width: min(100%, 210px);
    margin: 0;
    box-sizing: border-box;
}

.admin-rate-form > button {
    grid-column: 2;
}

.admin-rate-confirm .admin-action-button {
    width: min(100%, 340px);
}

@media (max-width: 700px) {
    .admin-form > p > label,
    .admin-student-batch > p > label {
        grid-template-columns: minmax(0, 1fr);
    }

    .admin-field-help {
        grid-column: 1;
    }

    .admin-form > .admin-action-button,
    .admin-student-batch .admin-action-button {
        margin-left: 0;
    }

    .admin-rate-form {
        grid-template-columns: minmax(0, 1fr);
    }

    .admin-rate-form > button {
        grid-column: 1;
    }
}


/* LeOn v1.3.2.2 - alignment refinement */

/* Action buttons start at the same position as form fields. */
.admin-form > p:has(> .admin-action-button),
.admin-student-batch > p:has(> .admin-action-button) {
    margin-left: 226px;
}

.admin-form > p > .admin-action-button,
.admin-student-batch > p > .admin-action-button {
    margin-left: 0;
}

/* Avoid inheriting excessive input widths in administration forms. */
.admin-form input[type="hidden"],
.admin-student-batch input[type="hidden"] {
    display: none;
}

.admin-form > p > label > input,
.admin-form > p > label > select,
.admin-student-batch > p > label > input,
.admin-student-batch > p > label > select {
    max-width: 100%;
}

/* Consistent width for navigation cards on the admin landing page. */
.admin-module-links a.nav-button {
    display: inline-flex;
    width: min(100%, 370px);
    min-height: 42px;
    box-sizing: border-box;
    justify-content: center;
    text-align: center;
}

.admin-module-links p {
    margin: 0 0 12px;
}

.admin-module-links p:last-child {
    margin-bottom: 0;
}

@media (max-width: 700px) {
    .admin-form > p:has(> .admin-action-button),
    .admin-student-batch > p:has(> .admin-action-button) {
        margin-left: 0;
    }
}

/* C5.13.48m.116t.2 RESPONSIVE FIX
   Scoped administration layout corrections.
   Preserve desktop alignment and table-local scrolling.
*/

@media (max-width: 700px) {

    main.container {
        width: 100%;
        max-width: 100%;
        min-width: 0;
    }

    main.container > .bookcard,
    main.container > .searchpanel,
    main.container section.bookcard,
    main.container section.searchpanel {
        width: 100%;
        max-width: 100%;
        min-width: 0;
    }

    main.container h1,
    main.container h2,
    main.container p,
    main.container label {
        overflow-wrap: anywhere;
    }

    .admin-module-links,
    .admin-module-links > p {
        min-width: 0;
        max-width: 100%;
    }

    .admin-module-links a.nav-button {
        max-width: 100%;
        white-space: normal;
        overflow-wrap: anywhere;
    }

    .admin-form,
    .admin-student-batch,
    .admin-rate-form {
        min-width: 0;
        max-width: 100%;
    }

    .admin-form > p,
    .admin-student-batch > p {
        min-width: 0;
        max-width: 100%;
    }

    .admin-form > p > label,
    .admin-student-batch > p > label {
        min-width: 0;
        max-width: 100%;
        grid-template-columns: minmax(0, 1fr);
    }

    .admin-form input:not([type="hidden"]),
    .admin-form select,
    .admin-student-batch input:not([type="hidden"]),
    .admin-student-batch select,
    .admin-rate-form input:not([type="hidden"]) {
        max-width: 100%;
        min-width: 0;
    }

    .admin-form input[type="file"] {
        width: 100%;
        max-width: 100%;
    }

    .admin-form .admin-action-button,
    .admin-student-batch .admin-action-button,
    .admin-rate-form .admin-action-button {
        max-width: 100%;
        white-space: normal;
        overflow-wrap: anywhere;
    }

    .admin-form > .admin-action-button,
    .admin-form > p:has(> .admin-action-button),
    .admin-student-batch > p:has(> .admin-action-button) {
        margin-left: 0;
    }

    .admin-table-wrap {
        display: block;
        width: 100%;
        max-width: 100%;
        min-width: 0;
        overflow-x: auto;
        overscroll-behavior-x: contain;
        -webkit-overflow-scrolling: touch;
    }

    .admin-students-table {
        min-width: 850px;
    }
}


/* =========================================================
   LEON V1.3.2.6 - HEADER AND ADMIN NAVIGATION
   ========================================================= */

header.top > .header-subtitle {
    font-size: 1.55rem;
    font-weight: 600;
    line-height: 1.25;
    color: #fff;
    text-align: center;
}

/* Symmetric columns keep the subtitle centered. */

@media (min-width: 1051px) {

    header.top:has(> .header-subtitle) {
        display: grid;
        grid-template-columns:
            minmax(0, 1fr)
            auto
            minmax(0, 1fr);
        align-items: center;
        column-gap: 16px;
    }

    header.top > .brand {
        grid-column: 1;
        justify-self: start;
        min-width: 0;
    }

    header.top > .header-subtitle {
        grid-column: 2;
        justify-self: center;
    }

    header.top > .top-actions {
        grid-column: 3;
        justify-self: end;
        margin-left: 0;
    }
}

/* Two-row arrangement for narrower screens. */

@media (max-width: 1050px) {

    header.top:has(> .header-subtitle) {
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        column-gap: 12px;
        row-gap: 12px;
        align-items: center;
    }

    header.top > .brand {
        grid-column: 1;
        grid-row: 1;
        min-width: 0;
    }

    header.top > .top-actions {
        grid-column: 2;
        grid-row: 1;
        width: auto;
        margin-left: 0;
        justify-self: end;
        flex-wrap: wrap;
    }

    header.top > .header-subtitle {
        grid-column: 1 / -1;
        grid-row: 2;
        justify-self: center;
        font-size: 1.45rem;
    }
}

/* Small mobile screens. */

@media (max-width: 480px) {

    header.top:has(> .header-subtitle) {
        grid-template-columns: minmax(0, 1fr);
    }

    header.top > .brand {
        grid-column: 1;
        grid-row: 1;
    }

    header.top > .header-subtitle {
        grid-column: 1;
        grid-row: 2;
        font-size: 1.35rem;
    }

    header.top > .top-actions {
        grid-column: 1;
        grid-row: 3;
        justify-self: end;
        width: 100%;
    }
}

/* Back navigation above the administration title. */

.admin-back-top {
    margin: 0 0 16px;
}

.admin-back-top > .nav-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}