:root {
    --bg: #f3f7ff;
    --ink: #13243d;
    --ink-soft: #4f5f7a;
    --brand: #0b6e80;
    --brand-strong: #0a4f6f;
    --accent: #ffc857;
    --card: #ffffff;
    --line: #d9e2f0;
    --ok: #1f9d69;
}

html,
body {
    font-family: "Segoe UI", "Poppins", Tahoma, sans-serif;
    margin: 0;
    min-height: 100%;
    color: var(--ink);
    background: radial-gradient(circle at 15% 15%, #eef7ff 0%, #f7fbff 45%, #eaf2ff 100%);
}

a {
    color: inherit;
}

.app-shell {
    display: grid;
    grid-template-columns: 300px 1fr;
    min-height: 100vh;
}

.left-rail {
    background: linear-gradient(170deg, #0d3146, #0b6e80 55%, #11999f);
    color: #fff;
    padding: 2rem 1.3rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.brand-kicker {
    letter-spacing: 0.2rem;
    font-size: 0.7rem;
    margin: 0;
    opacity: 0.85;
}

.brand-block h2 {
    margin: 0.25rem 0 0.5rem;
    line-height: 1.2;
}

.brand-sub {
    margin: 0;
    font-size: 0.92rem;
    opacity: 0.92;
}

.nav-root {
    display: grid;
    gap: 0.65rem;
    margin-top: 0.5rem;
}

.nav-link {
    text-decoration: none;
    color: #fff;
    padding: 0.7rem 0.85rem;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.08);
    transition: transform 0.2s ease, background 0.2s ease;
}

.nav-link.active,
.nav-link:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(4px);
}

.session-card {
    margin-top: auto;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    padding: 0.75rem;
}

.session-card .label {
    margin: 0;
    font-size: 0.72rem;
    opacity: 0.8;
    text-transform: uppercase;
}

.session-card .value {
    margin: 0.35rem 0 0;
    word-break: break-word;
    font-size: 0.92rem;
}

.main-pane {
    display: flex;
    flex-direction: column;
}

.top-strip {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(2px);
}

.page-content {
    padding: 1.4rem;
}

.panel {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 1.1rem;
    box-shadow: 0 8px 24px rgba(17, 55, 95, 0.08);
}

.page-head {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.page-head span.h1 {
    margin: 0;
    font-size: 1.5rem;
    pointer-events: none;
    border: none !important;
}

.muted {
    color: var(--ink-soft);
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.9rem;
}

.form-stack {
    display: grid;
    gap: 0.8rem;
}

label {
    font-weight: 600;
    font-size: 0.88rem;
}

input,
textarea,
select {
    width: 100%;
    padding: 0.62rem 0.72rem;
    border: 1px solid #c9d7ea;
    border-radius: 10px;
    font: inherit;
    margin-top: 0.35rem;
    box-sizing: border-box;
}

textarea {
    min-height: 110px;
    resize: vertical;
}

.editor-surface {
    margin-top: 0.35rem;
}

.editor-surface .ql-toolbar {
    border-radius: 10px 10px 0 0;
}

.editor-surface .ql-container {
    border-radius: 0 0 10px 10px;
    min-height: 180px;
}

.editor-surface .ql-editor {
    min-height: 180px;
}

.ql-snow .ql-picker.ql-font .ql-picker-label::before,
.ql-snow .ql-picker.ql-font .ql-picker-item::before {
    content: attr(data-value);
}

.ql-snow .ql-picker.ql-font .ql-picker-label:not([data-value])::before,
.ql-snow .ql-picker.ql-font .ql-picker-item:not([data-value])::before,
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value=""]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value=""]::before {
    content: "Default";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="arial"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="arial"]::before {
    content: "Arial";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="calibri"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="calibri"]::before {
    content: "Calibri";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="cambria"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="cambria"]::before {
    content: "Cambria";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="candara"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="candara"]::before {
    content: "Candara";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="century-gothic"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="century-gothic"]::before {
    content: "Century Gothic";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="comic-neue"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="comic-neue"]::before {
    content: "Comic Neue";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="comic-sans-ms"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="comic-sans-ms"]::before {
    content: "Comic Sans MS";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="consolas"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="consolas"]::before {
    content: "Consolas";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="courier-new"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="courier-new"]::before {
    content: "Courier New";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="georgia"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="georgia"]::before {
    content: "Georgia";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="lato"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="lato"]::before {
    content: "Lato";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="merriweather"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="merriweather"]::before {
    content: "Merriweather";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="montserrat"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="montserrat"]::before {
    content: "Montserrat";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="nunito"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="nunito"]::before {
    content: "Nunito";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="open-sans"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="open-sans"]::before {
    content: "Open Sans";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="playfair-display"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="playfair-display"]::before {
    content: "Playfair Display";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="poppins"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="poppins"]::before {
    content: "Poppins";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="roboto"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="roboto"]::before {
    content: "Roboto";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="segoe-ui"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="segoe-ui"]::before {
    content: "Segoe UI";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="source-sans-3"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="source-sans-3"]::before {
    content: "Source Sans 3";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="source-serif-4"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="source-serif-4"]::before {
    content: "Source Serif 4";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="tahoma"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="tahoma"]::before {
    content: "Tahoma";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="times-new-roman"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="times-new-roman"]::before {
    content: "Times New Roman";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="trebuchet-ms"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="trebuchet-ms"]::before {
    content: "Trebuchet MS";
}

.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="verdana"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="verdana"]::before {
    content: "Verdana";
}

.ql-font-arial {
    font-family: Arial, "Helvetica Neue", Helvetica, sans-serif;
}

.ql-font-calibri {
    font-family: Calibri, "Segoe UI", Arial, sans-serif;
}

.ql-font-cambria {
    font-family: Cambria, Georgia, "Times New Roman", serif;
}

.ql-font-candara {
    font-family: Candara, Calibri, "Segoe UI", sans-serif;
}

.ql-font-century-gothic {
    font-family: "Century Gothic", "Segoe UI", Arial, sans-serif;
}

.ql-font-comic-neue {
    font-family: "Comic Neue", "Comic Sans MS", "Segoe UI", Arial, sans-serif;
}

.ql-font-comic-sans-ms {
    font-family: "Comic Sans MS", "Comic Neue", "Segoe UI", Arial, sans-serif;
}

.ql-font-consolas {
    font-family: Consolas, "Courier New", monospace;
}

.ql-font-courier-new {
    font-family: "Courier New", Courier, monospace;
}

.ql-font-georgia {
    font-family: Georgia, "Times New Roman", serif;
}

.ql-font-lato {
    font-family: "Lato", "Segoe UI", Arial, sans-serif;
}

.ql-font-merriweather {
    font-family: "Merriweather", Georgia, "Times New Roman", serif;
}

.ql-font-montserrat {
    font-family: "Montserrat", "Segoe UI", Arial, sans-serif;
}

.ql-font-nunito {
    font-family: "Nunito", "Segoe UI", Arial, sans-serif;
}

.ql-font-open-sans {
    font-family: "Open Sans", "Segoe UI", Arial, sans-serif;
}

.ql-font-playfair-display {
    font-family: "Playfair Display", Georgia, "Times New Roman", serif;
}

.ql-font-poppins {
    font-family: "Poppins", "Segoe UI", Arial, sans-serif;
}

.ql-font-roboto {
    font-family: "Roboto", "Segoe UI", Arial, sans-serif;
}

.ql-font-segoe-ui {
    font-family: "Segoe UI", Calibri, Arial, sans-serif;
}

.ql-font-source-sans-3 {
    font-family: "Source Sans 3", "Segoe UI", Arial, sans-serif;
}

.ql-font-source-serif-4 {
    font-family: "Source Serif 4", Georgia, "Times New Roman", serif;
}

.ql-font-tahoma {
    font-family: Tahoma, "Segoe UI", Arial, sans-serif;
}

.ql-font-times-new-roman {
    font-family: "Times New Roman", Times, serif;
}

.ql-font-trebuchet-ms {
    font-family: "Trebuchet MS", "Segoe UI", Arial, sans-serif;
}

.ql-font-verdana {
    font-family: Verdana, Tahoma, Arial, sans-serif;
}

button {
    border: none;
    border-radius: 10px;
    padding: 0.62rem 0.9rem;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
}

.btn-primary {
    background: var(--brand);
    color: white;
}

.btn-primary:hover {
    background: var(--brand-strong);
}

.btn-light {
    background: #eef3fb;
    color: var(--ink);
}

.cards {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}

.card-item {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 7px 19px rgba(17, 55, 95, 0.08);
}

.card-item img {
    width: 100%;
    height: 150px;
    object-fit: cover;
}

.card-body {
    padding: 0.9rem;
}

.badge {
    display: inline-block;
    font-size: 0.72rem;
    background: #e8f3ff;
    color: #0f5a8d;
    border-radius: 999px;
    padding: 0.2rem 0.55rem;
}

.status-ok {
    color: var(--ok);
}

.table-wrap {
    overflow-x: auto;
}

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

th,
td {
    padding: 0.68rem;
    border-bottom: 1px solid #e7eef8;
    text-align: left;
    font-size: 0.9rem;
}

.viewer-frame {
    width: 100%;
    min-height: 420px;
    border: 1px solid var(--line);
    border-radius: 12px;
}

@media (max-width: 980px) {
    .app-shell {
        grid-template-columns: 1fr;
    }

    .left-rail {
        position: sticky;
        top: 0;
        z-index: 10;
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        padding: 0.85rem 1rem;
        gap: 0.75rem;
    }

    .brand-block {
        display: none;
    }

    .grid-2 {
        grid-template-columns: 1fr;
    }

    .nav-root {
        grid-auto-flow: column;
        grid-auto-columns: max-content;
        align-items: center;
        margin-top: 0;
        gap: 0.5rem;
    }

    .nav-link {
        padding: 0.55rem 0.7rem;
        transform: none;
        white-space: nowrap;
    }

    .nav-link:hover,
    .nav-link.active {
        transform: none;
    }

    .session-card {
        display: none;
    }

    .top-strip {
        padding: 0.75rem 1rem;
    }

    .page-content {
        padding: 1rem;
    }

    .page-head span.h1 {
        font-size: 1.25rem;
    }

    .viewer-frame {
        min-height: 320px;
    }
}

@media (max-width: 600px) {
    .cards {
        grid-template-columns: 1fr;
    }

    .card-item img {
        height: 170px;
    }

    th,
    td {
        padding: 0.55rem;
        font-size: 0.85rem;
    }

    .viewer-frame {
        min-height: 260px;
    }
}

#blazor-error-ui {
    display: none;
    position: fixed;
    inset: auto 1rem 1rem 1rem;
    padding: 0.85rem 1rem;
    border-radius: 12px;
    background: #b42318;
    color: #fff;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    z-index: 1000;
}

#blazor-error-ui a {
    color: #fff;
    font-weight: 700;
    margin-left: 0.75rem;
}

#blazor-error-ui .dismiss {
    float: right;
    cursor: pointer;
    font-weight: 800;
    margin-left: 0.75rem;
}