html, body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

a, .btn-link {
    color: #006bb7;
}

.btn-primary {
    color: #fff;
    background-color: #1b6ec2;
    border-color: #1861ac;
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

.content {
    padding-top: 1.1rem;
}

h1:focus {
    outline: none;
}

.valid.modified:not([type=checkbox]) {
    outline: 1px solid #26b050;
}

.invalid {
    outline: 1px solid #e50000;
}

.validation-message {
    color: #e50000;
}

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, #b32121;
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
}

    .blazor-error-boundary::after {
        content: "An error has occurred."
    }

.darker-border-checkbox.form-check-input {
    border-color: #929292;
}

/* ============ Catálogo de ebooks ============ */
:root {
    --accent: #8c52ff;
    --accent-dark: #7433e6;
    --bg: #f6f7fb;
    --card: #ffffff;
    --text: #1d1f29;
    --muted: #6b7080;
    --border: #e6e8f0;
}

.home-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}
.home-header h1 { margin: 0; font-size: 1.9rem; }

.btn {
    display: inline-block;
    padding: 0.6rem 1.1rem;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--text);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
}
.btn:hover { border-color: var(--accent); }
.btn-primary {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); }

.ebook-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: 1.5rem;
}
.ebook-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.ebook-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 28px rgba(30, 30, 60, 0.12);
}
.ebook-cover {
    aspect-ratio: 3 / 4;
    background: linear-gradient(135deg, #e7dbff, #f3edff);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.ebook-cover img { width: 100%; height: 100%; object-fit: cover; }
.ebook-cover-placeholder { font-size: 3rem; opacity: 0.5; }
.ebook-body { padding: 1rem 1.1rem 1.2rem; display: flex; flex-direction: column; gap: 0.5rem; flex: 1; }
.ebook-cat {
    align-self: flex-start;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--accent);
    background: #eee6ff;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    font-weight: 700;
}
.ebook-body h3 { margin: 0; font-size: 1.05rem; line-height: 1.3; }
.ebook-desc { margin: 0; color: var(--muted); font-size: 0.88rem; flex: 1; }
.ebook-footer { display: flex; align-items: center; justify-content: space-between; margin-top: 0.4rem; }
.ebook-price { font-size: 1.25rem; font-weight: 800; color: var(--text); }

.empty-state {
    text-align: center;
    padding: 4rem 1rem;
    background: var(--card);
    border: 1px dashed var(--border);
    border-radius: 16px;
}
.empty-state p { color: var(--muted); margin-bottom: 1.2rem; }

.admin-form {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.75rem;
    max-width: 640px;
}
.form-group { margin-bottom: 1.1rem; display: flex; flex-direction: column; gap: 0.35rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group label { font-weight: 600; font-size: 0.9rem; }
.form-control {
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 0.95rem;
    font-family: inherit;
}
.form-control:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(140, 82, 255, 0.18); }

.ebook-download {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--accent);
    background: #eee6ff;
    padding: 0.3rem 0.6rem;
    border-radius: 8px;
}
.ebook-download:hover { background: #ddccff; }

.file-hint { font-size: 0.8rem; color: var(--muted); }

.alert-success {
    background: #e7f8ee;
    border: 1px solid #b6e6c9;
    color: #1d7a45;
    padding: 0.8rem 1rem;
    border-radius: 10px;
    margin-bottom: 1.25rem;
}
.alert-error {
    background: #fdecec;
    border: 1px solid #f3bcbc;
    color: #b32424;
    padding: 0.8rem 1rem;
    border-radius: 10px;
    margin-bottom: 1.25rem;
}

.login-wrap {
    max-width: 420px;
    margin: 4rem auto;
}
.login-form h1 { margin: 0 0 0.3rem; font-size: 1.6rem; }
.login-sub { color: var(--muted); margin: 0 0 1.3rem; }

/* Tabla de administración */
.admin-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
}
.admin-table th, .admin-table td {
    text-align: left;
    padding: 0.7rem 0.9rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
}
.admin-table th {
    background: #f3f4f9;
    font-weight: 700;
    color: var(--muted);
    text-transform: uppercase;
    font-size: 0.72rem;
    letter-spacing: 0.03em;
}
.admin-table tr:last-child td { border-bottom: none; }
.admin-actions { display: flex; gap: 0.4rem; align-items: center; justify-content: flex-end; }
.btn-sm { padding: 0.35rem 0.7rem; font-size: 0.82rem; border-radius: 8px; }
.btn-danger { background: #e2474733; color: #c0392b; border-color: #e0a9a9; }
.btn-danger:hover { background: #e24747; color: #fff; border-color: #e24747; }
.confirm-text { font-size: 0.82rem; color: var(--muted); }

@media (max-width: 520px) {
    .form-row { grid-template-columns: 1fr; }
}

/* ============ Admin redesign (sidebar + drawer) ============ */
.admin-shell {
    display: flex;
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

/* --- Sidebar --- */
.admin-sidebar {
    width: 248px;
    flex-shrink: 0;
    background: #14121f;
    color: #c9c6d6;
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
}
.admin-sidebar__head { padding: 24px 22px 18px; border-bottom: 1px solid rgba(255,255,255,.07); }
.admin-brand { font-family: "Dancing Script", cursive; font-size: 1.7rem; font-weight: 700; color: #fff; line-height: 1; }
.admin-brand__sub { font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: #7d7a90; margin-top: 2px; }
.admin-nav { display: flex; flex-direction: column; gap: 4px; padding: 16px 12px; flex: 1; }
.admin-nav__item {
    display: flex; align-items: center; gap: 11px;
    padding: 10px 13px; border-radius: 9px;
    font-size: .9rem; font-weight: 500; cursor: pointer;
    color: #c9c6d6; background: none; border: none; text-align: left; width: 100%;
    font-family: inherit; transition: background .15s, color .15s;
}
.admin-nav__item:hover { background: rgba(255,255,255,.05); color: #fff; }
.admin-nav__item.active { background: var(--accent); color: #fff; }
.admin-nav__icon { font-size: 1.05rem; width: 20px; text-align: center; }
.admin-user { padding: 14px 16px; border-top: 1px solid rgba(255,255,255,.07); display: flex; align-items: center; gap: 10px; }
.admin-user__avatar {
    width: 34px; height: 34px; border-radius: 50%;
    background: linear-gradient(135deg, #a77aff, var(--accent));
    color: #fff; font-weight: 700; font-size: .8rem;
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.admin-user__name { font-size: .82rem; color: #eceaf4; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.admin-user__role { font-size: .72rem; color: #7d7a90; }
.admin-logout { background: none; border: none; color: #7d7a90; cursor: pointer; font-size: 1.1rem; padding: 4px; }
.admin-logout:hover { color: #fff; }

/* --- Main --- */
.admin-main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.admin-topbar {
    display: flex; align-items: center; justify-content: space-between; gap: 16px;
    padding: 22px 32px; background: #fff; border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 20;
}
.admin-topbar h1 { font-size: 1.4rem; font-weight: 800; letter-spacing: -.02em; margin: 0; }
.admin-topbar p { font-size: .85rem; color: var(--muted); margin: 2px 0 0; }
.admin-body { padding: 26px 32px 60px; flex: 1; }

.admin-newbtn {
    padding: 9px 18px; border-radius: 10px; border: none;
    background: var(--accent); color: #fff; font-weight: 600; font-size: .88rem;
    cursor: pointer; box-shadow: 0 6px 16px rgba(140,82,255,.30); white-space: nowrap;
}
.admin-newbtn:hover { background: var(--accent-dark); }

/* --- KPIs --- */
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 16px; margin-bottom: 26px; }
.kpi-card { background: #fff; border: 1px solid var(--border); border-radius: 16px; padding: 18px 20px; }
.kpi-card__label { font-size: .75rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); font-weight: 600; }
.kpi-card__value { font-size: 1.7rem; font-weight: 800; margin-top: 6px; letter-spacing: -.02em; }

/* --- Toolbar --- */
.admin-toolbar { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.admin-search { position: relative; flex: 1; min-width: 220px; }
.admin-search input {
    width: 100%; padding: 10px 14px 10px 36px;
    border: 1px solid var(--border); border-radius: 10px; font-size: .9rem; background: #fff; font-family: inherit;
}
.admin-search input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(140,82,255,.18); }
.admin-search__icon { position: absolute; left: 13px; top: 50%; transform: translateY(-50%); color: #9aa0b0; font-size: .95rem; }
.admin-filter { padding: 10px 14px; border: 1px solid var(--border); border-radius: 10px; font-size: .9rem; background: #fff; color: var(--text); cursor: pointer; font-family: inherit; }

/* --- Table --- */
.admin-card { background: #fff; border: 1px solid var(--border); border-radius: 16px; overflow: hidden; }
.admin-table2 { width: 100%; border-collapse: collapse; }
.admin-table2 th {
    text-align: left; padding: 12px 18px; background: #f3f4f9;
    font-size: .72rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); font-weight: 700;
}
.admin-table2 td { padding: 12px 18px; border-top: 1px solid #eef0f5; vertical-align: middle; }
.admin-cell-course { display: flex; align-items: center; gap: 13px; }
.admin-cover {
    width: 40px; height: 52px; border-radius: 8px; flex-shrink: 0;
    display: flex; align-items: center; justify-content: center; font-size: 1.1rem; overflow: hidden;
}
.admin-cover img { width: 100%; height: 100%; object-fit: cover; }
.admin-course-title { font-weight: 600; font-size: .92rem; line-height: 1.2; }
.admin-course-desc { font-size: .8rem; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 340px; }
.cat-pill {
    display: inline-block; font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .03em;
    color: var(--accent); background: #eee6ff; padding: 4px 10px; border-radius: 999px; white-space: nowrap;
}
.price-now { font-weight: 800; font-size: .98rem; }
.price-orig { color: #9aa0b0; text-decoration: line-through; font-size: .82rem; margin-left: 6px; }
.pdf-yes { display: inline-block; font-size: .76rem; font-weight: 700; color: #1d7a45; background: #e7f8ee; padding: 4px 10px; border-radius: 999px; white-space: nowrap; }
.pdf-no { display: inline-block; font-size: .76rem; font-weight: 600; color: #9aa0b0; background: #f3f4f9; padding: 4px 10px; border-radius: 999px; white-space: nowrap; }
.admin-rowactions { display: flex; gap: 6px; align-items: center; justify-content: flex-end; }

.admin-empty { text-align: center; padding: 48px 20px; color: var(--muted); }
.admin-empty__icon { font-size: 2rem; margin-bottom: 10px; }
.admin-empty p { margin: 0; font-size: .92rem; }

/* --- Catalog preview --- */
.admin-catalog { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 20px; }
.admin-catalog__card {
    background: #fff; border: 1px solid var(--border); border-radius: 16px; overflow: hidden;
    display: flex; flex-direction: column; transition: transform .15s ease, box-shadow .15s ease;
}
.admin-catalog__card:hover { box-shadow: 0 12px 28px rgba(30,30,60,.12); transform: translateY(-4px); }
.admin-catalog__cover { aspect-ratio: 3 / 4; display: flex; align-items: center; justify-content: center; font-size: 2.6rem; overflow: hidden; }
.admin-catalog__cover img { width: 100%; height: 100%; object-fit: cover; }
.admin-catalog__body { padding: 14px 15px 16px; display: flex; flex-direction: column; gap: 7px; flex: 1; }
.admin-catalog__body h3 { font-size: 1.02rem; font-weight: 700; line-height: 1.28; margin: 0; }
.admin-catalog__body p { font-size: .84rem; color: var(--muted); line-height: 1.45; flex: 1; margin: 0; }

/* --- Toast --- */
.admin-toast {
    display: flex; align-items: center; gap: 10px;
    background: #e7f8ee; border: 1px solid #b6e6c9; color: #1d7a45;
    padding: 11px 15px; border-radius: 12px; margin-bottom: 20px; font-size: .9rem; font-weight: 500;
}

/* --- Drawer --- */
.admin-scrim {
    position: fixed; inset: 0; background: rgba(20,18,31,.42);
    z-index: 55; opacity: 0; pointer-events: none; transition: opacity .3s;
}
.admin-scrim.open { opacity: 1; pointer-events: auto; }
.admin-drawer {
    position: fixed; top: 0; right: 0; bottom: 0; width: min(460px, 92vw);
    background: #fff; z-index: 60; box-shadow: -18px 0 50px rgba(20,18,31,.18);
    display: flex; flex-direction: column;
    transform: translateX(105%); transition: transform .32s cubic-bezier(.4,0,.2,1);
}
.admin-drawer.open { transform: translateX(0); }
.admin-drawer form { display: flex; flex-direction: column; flex: 1; min-height: 0; }
.admin-drawer__head { display: flex; align-items: center; justify-content: space-between; padding: 22px 26px; border-bottom: 1px solid var(--border); }
.admin-drawer__head h2 { font-size: 1.15rem; font-weight: 800; letter-spacing: -.02em; margin: 0; }
.admin-drawer__close { background: none; border: none; font-size: 1.4rem; color: #9aa0b0; cursor: pointer; line-height: 1; padding: 4px; }
.admin-drawer__close:hover { color: var(--text); }
.admin-drawer__body { padding: 24px 26px; overflow-y: auto; flex: 1; }
.admin-drawer__foot { display: flex; gap: 10px; padding: 18px 26px; border-top: 1px solid var(--border); background: #fafbfd; }
.admin-drawer__foot .btn-primary { flex: 1; }

/* Flashcards: la escritura tailandesa necesita su propia fuente y algo más de
   interlineado, o los signos de tono se recortan contra la línea de arriba. */
.thai-cell {
    font-family: "Noto Sans Thai", "Inter", sans-serif;
    font-size: 1.15rem;
    line-height: 1.9;
}
.form-control--thai {
    font-family: "Noto Sans Thai", "Inter", sans-serif;
    font-size: 1.1rem;
    line-height: 1.9;
}

@media (max-width: 860px) {
    .admin-sidebar { width: 68px; }
    .admin-brand { font-size: 1.15rem; }
    .admin-brand__sub, .admin-nav__label, .admin-user__name, .admin-user__role { display: none; }
    .admin-sidebar__head { padding: 20px 12px 16px; text-align: center; }
    .admin-nav__item { justify-content: center; gap: 0; }
    .admin-user { justify-content: center; }
    .admin-topbar, .admin-body { padding-left: 20px; padding-right: 20px; }
}