:root {
    --ev4x-bg: #081529;
    --ev4x-bg-2: #0e2746;
    --ev4x-card: #ffffff;
    --ev4x-text: #142033;
    --ev4x-muted: #68738a;
    --ev4x-gold: #d9a441;
    --ev4x-blue: #1463b8;
    --ev4x-cyan: #25b7d3;
    --ev4x-green: #1f9d73;
    --ev4x-red: #c2413b;
    --ev4x-border: #d9e2ef;
    --ev4x-shadow: 0 18px 45px rgba(7, 25, 52, .14);
}

.ev4x-admin-wrap h1 {
    font-weight: 800;
    letter-spacing: -.02em;
}

.ev4x-admin-lead {
    max-width: 920px;
    font-size: 15px;
    color: #4b5563;
}

.ev4x-tabs {
    margin-bottom: 18px;
}

.ev4x-grid {
    display: grid;
    gap: 16px;
    margin: 16px 0;
}

.ev4x-grid-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.ev4x-card,
.ev4x-panel {
    background: var(--ev4x-card);
    border: 1px solid var(--ev4x-border);
    border-radius: 18px;
    box-shadow: var(--ev4x-shadow);
}

.ev4x-panel {
    padding: 20px;
    margin: 18px 0;
}

.ev4x-metric {
    padding: 20px;
    min-height: 115px;
}

.ev4x-metric strong {
    display: block;
    font-size: 34px;
    line-height: 1;
    color: var(--ev4x-blue);
}

.ev4x-metric span {
    display: block;
    margin-top: 8px;
    font-weight: 800;
    color: var(--ev4x-text);
}

.ev4x-metric small {
    display: block;
    margin-top: 6px;
    color: var(--ev4x-muted);
}

.ev4x-toolbar {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
    margin: 18px 0;
}

.ev4x-inline-form {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}

.ev4x-inline-form input,
.ev4x-inline-form select {
    min-height: 32px;
}

.ev4x-form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.ev4x-form-grid label,
.ev4x-full-label,
.ev4x-submit-form label,
.ev4x-front-access-form label {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-weight: 700;
    color: var(--ev4x-text);
}

.ev4x-form-grid input,
.ev4x-form-grid select,
.ev4x-full-label input,
.ev4x-full-label textarea,
.ev4x-submit-form input,
.ev4x-submit-form textarea,
.ev4x-front-access-form input {
    width: 100%;
    max-width: 100%;
    border-radius: 12px;
    border: 1px solid var(--ev4x-border);
    padding: 9px 12px;
    background: #fff;
}

.ev4x-full-label {
    margin-top: 16px;
}

.ev4x-checkbox-row {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    margin: 16px 0;
    font-weight: 700;
}

.ev4x-table td,
.ev4x-table th {
    vertical-align: middle;
}

.ev4x-badge {
    display: inline-flex;
    align-items: center;
    min-height: 24px;
    padding: 3px 9px;
    border-radius: 999px;
    background: #eef4ff;
    color: #1d4d8f;
    font-size: 12px;
    font-weight: 800;
}

.ev4x-badge-published {
    background: #e7f8ee;
    color: #176b4e;
}

.ev4x-badge-draft {
    background: #f3f4f6;
    color: #4b5563;
}

.ev4x-badge-closed {
    background: #fff4e5;
    color: #935600;
}

.ev4x-danger {
    color: #a5211d !important;
    border-color: #e6aaa7 !important;
}

.ev4x-delete-form {
    display: inline-block;
    margin: 4px 0 0 0;
}

.ev4x-submission-card {
    border: 1px solid var(--ev4x-border);
    border-radius: 18px;
    padding: 18px;
    margin-bottom: 18px;
    background: #fbfdff;
}

.ev4x-submission-head,
.ev4x-assignment-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 14px;
}

.ev4x-answer-box,
.ev4x-feedback-text {
    background: #f5f7fb;
    border-left: 4px solid var(--ev4x-cyan);
    border-radius: 12px;
    padding: 12px 14px;
    margin: 12px 0;
}

.ev4x-feedback-form {
    margin-top: 12px;
}

.ev4x-feedback-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.ev4x-steps {
    margin-left: 22px;
    line-height: 1.7;
}

.ev4x-front {
    color: var(--ev4x-text);
    font-family: inherit;
}

.ev4x-hero {
    position: relative;
    overflow: hidden;
    border-radius: 26px;
    padding: 34px;
    background:
        radial-gradient(circle at 20% 20%, rgba(37, 183, 211, .45), transparent 28%),
        radial-gradient(circle at 80% 25%, rgba(217, 164, 65, .32), transparent 28%),
        linear-gradient(135deg, var(--ev4x-bg), var(--ev4x-bg-2));
    color: #fff;
    box-shadow: var(--ev4x-shadow);
    margin-bottom: 18px;
}

.ev4x-hero:after {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle, rgba(255,255,255,.95) 1px, transparent 1.6px),
        radial-gradient(circle, rgba(255,255,255,.42) 1px, transparent 1.4px);
    background-size: 42px 42px, 76px 76px;
    opacity: .34;
    pointer-events: none;
}

.ev4x-hero > div {
    position: relative;
    z-index: 1;
    max-width: 780px;
}

.ev4x-hero h2 {
    margin: 8px 0 10px;
    color: #fff;
    font-size: clamp(28px, 4vw, 44px);
    line-height: 1.05;
}

.ev4x-hero p {
    margin: 0;
    color: rgba(255,255,255,.88);
    font-size: 17px;
}

.ev4x-kicker {
    display: inline-flex;
    color: var(--ev4x-gold);
    text-transform: uppercase;
    letter-spacing: .08em;
    font-size: 12px;
    font-weight: 900;
}

.ev4x-access-card {
    padding: 18px;
    margin-bottom: 18px;
}

.ev4x-front-access-form {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 12px;
    align-items: end;
}

.ev4x-front-access-form button,
.ev4x-submit-button {
    border: none;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--ev4x-blue), var(--ev4x-cyan));
    color: #fff;
    padding: 11px 18px;
    font-weight: 900;
    cursor: pointer;
    box-shadow: 0 10px 22px rgba(20, 99, 184, .24);
}

.ev4x-privacy-note,
.ev4x-file-help,
.ev4x-muted {
    color: var(--ev4x-muted);
    font-size: 13px;
}

.ev4x-front-section {
    margin-top: 26px;
}

.ev4x-front-section h3 {
    font-size: 24px;
    margin-bottom: 14px;
}

.ev4x-assignment-card,
.ev4x-feedback-card {
    padding: 22px;
    margin-bottom: 18px;
}

.ev4x-assignment-head h4 {
    margin: 4px 0 0;
    font-size: 24px;
    line-height: 1.2;
}

.ev4x-due {
    white-space: nowrap;
    border-radius: 999px;
    padding: 7px 12px;
    background: #edf7ff;
    color: #125a9f;
    font-weight: 900;
    font-size: 13px;
}

.ev4x-due-late {
    background: #fff0ed;
    color: var(--ev4x-red);
}

.ev4x-assignment-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 12px 0;
}

.ev4x-assignment-meta span {
    border: 1px solid var(--ev4x-border);
    border-radius: 999px;
    padding: 4px 9px;
    color: var(--ev4x-muted);
    font-size: 12px;
    font-weight: 700;
}

.ev4x-description {
    line-height: 1.65;
}

.ev4x-details {
    border: 1px solid var(--ev4x-border);
    border-radius: 14px;
    padding: 10px 13px;
    margin: 14px 0;
    background: #fbfdff;
}

.ev4x-details summary {
    cursor: pointer;
    font-weight: 900;
}

.ev4x-submit-form {
    display: grid;
    gap: 12px;
    margin-top: 16px;
    border-top: 1px solid var(--ev4x-border);
    padding-top: 16px;
}

.ev4x-message {
    border-radius: 16px;
    padding: 13px 16px;
    margin: 16px 0;
    font-weight: 800;
}

.ev4x-message-success {
    background: #e7f8ee;
    color: #176b4e;
    border: 1px solid #b7e6cc;
}

.ev4x-message-error {
    background: #fff0ed;
    color: #9f211d;
    border: 1px solid #f2beb8;
}

.ev4x-score-line {
    font-weight: 900;
    color: var(--ev4x-blue);
}

.ev4x-front-footer {
    margin-top: 28px;
    text-align: center;
    color: var(--ev4x-muted);
    font-size: 13px;
}

@media (max-width: 900px) {
    .ev4x-grid-4,
    .ev4x-form-grid,
    .ev4x-feedback-grid,
    .ev4x-front-access-form {
        grid-template-columns: 1fr;
    }

    .ev4x-submission-head,
    .ev4x-assignment-head,
    .ev4x-toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .ev4x-due {
        white-space: normal;
        width: fit-content;
    }
}