.alert {
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 12px 14px;
    margin-bottom: 16px;
    background: color-mix(in srgb, var(--glass-strong) 78%, transparent);
    color: var(--text);
    font-size: 0.92rem;
}

.alert-success {
    border-color: color-mix(in srgb, #16a34a 35%, var(--line));
    background: color-mix(in srgb, #16a34a 12%, var(--glass-strong));
}

.alert-error {
    border-color: color-mix(in srgb, #ef4444 35%, var(--line));
    background: color-mix(in srgb, #ef4444 12%, var(--glass-strong));
}

.app-form {
    display: grid;
    gap: 14px;
}

.app-form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.app-field {
    display: grid;
    gap: 8px;
    font-weight: 600;
    font-size: 0.92rem;
}

.app-field input,
.app-field select,
.app-field textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: color-mix(in srgb, var(--glass) 75%, transparent);
    color: var(--text);
    font: inherit;
    padding: 0.9rem 1rem;
}

.app-field textarea {
    min-height: 120px;
    resize: vertical;
}

.app-field input:focus,
.app-field select:focus,
.app-field textarea:focus {
    outline: none;
    border-color: color-mix(in srgb, var(--accent) 60%, var(--line));
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 17%, transparent);
}

.app-card-pad {
    padding: clamp(18px, 3vw, 28px);
}

.app-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

.inline-form {
    display: inline-flex;
    margin: 0;
}

.app-toolbar {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 18px;
}

.app-table-card {
    padding: 16px;
    overflow: hidden;
}

.app-muted {
    color: var(--text-muted);
}

.app-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 1px solid var(--line);
    background: color-mix(in srgb, var(--glass) 82%, transparent);
    display: inline-grid;
    place-items: center;
    overflow: hidden;
    color: var(--text-muted);
    font-weight: 700;
}

.app-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.app-course-media {
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: 14px;
    overflow: hidden;
    border: 1px solid var(--line);
    background: color-mix(in srgb, var(--bg-soft) 86%, transparent);
}

.app-course-media img,
.app-course-media iframe {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border: 0;
}

.app-page-narrow {
    max-width: 980px;
    margin-inline: auto;
}

.app-page-wide {
    max-width: 1180px;
    margin-inline: auto;
}

.app-stack {
    display: grid;
    gap: 16px;
}

.app-two-col {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
    gap: 16px;
    align-items: start;
}

.app-three-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.app-empty {
    border: 1px dashed var(--line);
    border-radius: 16px;
    padding: 22px;
    text-align: center;
    color: var(--text-muted);
}

@media (max-width: 920px) {
    .app-form-grid,
    .app-two-col,
    .app-three-grid {
        grid-template-columns: 1fr;
    }
}