:root {
    --app-primary: #133a63;
    --app-primary-strong: #0c2743;
    --app-accent: #1d5f9c;
    --app-bg: #f2f5fa;
    --app-surface: #ffffff;
    --app-text: #1f2937;
    --app-muted: #6b7280;
    --app-border: #d7e0eb;
}

html,
body {
    height: 100%;
}

body {
    margin: 0;
    background: var(--app-bg);
    color: var(--app-text);
    font-family: "Inter", "Segoe UI", Tahoma, Arial, sans-serif;
    line-height: 1.6;
}

.top-header .navbar {
    background: linear-gradient(90deg, var(--app-primary-strong), var(--app-primary));
    min-height: 64px;
}

.app-layout {
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: 1.5rem;
    padding: 1.5rem;
    min-height: calc(100vh - 64px);
}

.sidebar-panel {
    border: 1px solid var(--app-border);
    border-radius: 14px;
    background: var(--app-surface);
    box-shadow: 0 10px 28px rgba(20, 43, 72, 0.08);
}

.sidebar-title {
    padding: 1rem 1rem 0.75rem;
    border-bottom: 1px solid var(--app-border);
    margin-bottom: 0.75rem;
}

.sidebar-panel .nav-link {
    color: #284057;
    border-radius: 10px;
    font-weight: 500;
    padding: 0.55rem 0.75rem;
}

.sidebar-panel .nav-link:hover {
    background: #e9f1fa;
    color: var(--app-primary);
}

.sidebar-panel .nav-link.active {
    background: var(--app-primary);
    color: #fff;
}

.nav-sub-item .nav-link {
    padding-left: 1.4rem;
    font-size: 0.93rem;
}

.content-area {
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.content-card {
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    border-radius: 14px;
    box-shadow: 0 12px 24px rgba(15, 36, 62, 0.06);
    padding: 1.25rem 1.5rem;
}

.app-footer {
    padding: 1rem 0.25rem 0.25rem;
    text-align: right;
}

.tm-row {
    margin: 0;
}

.tm-color-primary,
span.tm-color-primary {
    color: var(--app-primary);
}

.tm-post-title {
    font-size: 1.65rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.tm-mb-40 {
    margin-bottom: 1.5rem;
}

p,
span {
    color: var(--app-text);
}

a {
    color: var(--app-accent);
}

a:hover {
    color: var(--app-primary);
}

video {
    width: 100%;
    height: auto;
    border-radius: 12px;
    border: 1px solid var(--app-border);
    background: #0f172a;
}

.video-focus-page .app-layout {
    min-height: calc(100vh - 64px);
}

.video-focus-page .content-card {
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - 64px - 3rem - 2.5rem);
}

.video-focus-page .content-card > .tm-row:first-child {
    flex: 0 0 auto;
}

.video-focus-page .content-card > .tm-row:last-child {
    flex: 1 1 auto;
}

.video-focus-page .content-card > .tm-row:last-child .col-12 {
    height: 100%;
    display: flex;
}

.video-focus-page .content-card video {
    width: 100%;
    height: 100%;
    min-height: 60vh;
    object-fit: contain;
}

@media (min-width: 992px) {
    .sidebar-panel {
        position: sticky;
        top: 1.5rem;
        align-self: start;
        max-height: calc(100vh - 3rem - 64px);
        overflow-y: auto;
    }
}

@media (max-width: 991.98px) {
    .app-layout {
        display: block;
        padding: 1rem;
    }

    .content-card {
        padding: 1rem;
    }

    .sidebar-panel {
        width: min(86vw, 340px);
        border-radius: 0;
    }

    .video-focus-page .content-card {
        min-height: auto;
    }

    .video-focus-page .content-card video {
        min-height: auto;
        height: auto;
    }

    .app-footer {
        text-align: left;
    }
}