/**
 * Video Guide Page Styles
 * Two-column layout: video + tabs on left, tutorial sidebar list on right
 */

/* ==========================================================================
   Breadcrumb Bar
   ========================================================================== */

.vg-hero {
    padding: 80px 0 24px;
    background: var(--color-white);
}

/* ==========================================================================
   Two-Column Layout
   ========================================================================== */

.vg-section {
    padding: 32px 0 80px;
}

.vg-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 40px;
    align-items: start;
}

.vg-main {
    min-width: 0;
    /* prevent overflow from iframe */
}

/* ==========================================================================
   OS Tabs
   ========================================================================== */

.vg-tabs__bar {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--color-border, #e5e7eb);
    margin-bottom: 32px;
    overflow-x: auto;
    position: relative;
}

.vg-tabs__btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0.875rem 1.5rem;
    background: transparent;
    border: none;
    border-bottom: 2px solid var(--color-primary-blue);
    margin-bottom: 20px;
    cursor: pointer;
    font-family: var(--font-secondary);
    font-size: var(--fs-body);
    font-weight: var(--fw-medium);
    color: var(--color-text-medium);
    white-space: nowrap;
    transition: all var(--transition-fast);
    position: relative;
}

.vg-tabs__btn i {
    font-size: 1.1em;
}

.vg-tabs__btn:hover {
    color: var(--color-primary-blue);
    background: rgba(0, 173, 226, 0.05);
}

.vg-tabs__btn.is-active {
    color: var(--color-white);
    background: var(--color-primary-blue);
    font-weight: var(--fw-semibold);
    border-top-left-radius: 15px;
    border-top-right-radius: 15px;
}

.vg-tabs__btn.is-active:hover {
    background: var(--color-primary-blue);
    color: var(--color-white);
}

/* Tab Panels */
.vg-tabs__panel {
    display: none;
}

.vg-tabs__panel.is-active {
    display: block;
    animation: vgFadeIn 0.3s ease;
}

@keyframes vgFadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.vg-panel__title {
    font-size: var(--fs-h4);
    color: var(--color-text-dark);
    margin-bottom: 8px;
    line-height: var(--lh-tight);
}

.vg-panel__description {
    font-size: var(--fs-small);
    color: var(--color-text-medium);
    line-height: var(--lh-relaxed);
    margin-bottom: 24px;
}

/* Video Embed */
.vg-video {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    /* 16:9 */
    background: var(--color-black);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.vg-video iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* ==========================================================================
   Sidebar Tutorial List
   ========================================================================== */

.vg-sidebar {
    position: sticky;
    top: 100px;
    background: var(--color-white);
    border: 1px solid var(--color-bg-light);
    border-radius: 12px;
    padding: 24px;
    height: 100%;
}

.vg-sidebar__title {
    font-size: var(--fs-small);
    font-weight: var(--fw-semibold);
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-bg-light);
}

.vg-sidebar__list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.vg-sidebar__item {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 10px 14px;
    background: none;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-family: var(--font-secondary);
    font-size: var(--fs-small);
    font-weight: var(--fw-medium);
    color: var(--color-text-medium);
    text-align: left;
    transition: all var(--transition-fast);
    line-height: var(--lh-normal);
}

.vg-sidebar__item i {
    flex-shrink: 0;
    width: 18px;
    text-align: center;
    font-size: 0.85em;
    opacity: 0.6;
    transition: all var(--transition-fast);
}

.vg-sidebar__item:hover {
    background: var(--color-bg-light);
    color: var(--color-text-dark);
}

.vg-sidebar__item:hover i {
    opacity: 1;
}

/* Active / Selected State */
.vg-sidebar__item.is-current {
    background: linear-gradient(135deg, rgba(0, 173, 226, 0.08) 0%, rgba(0, 119, 182, 0.06) 100%);
    color: var(--color-primary-blue);
    font-weight: var(--fw-semibold);
}

.vg-sidebar__item.is-current i {
    opacity: 1;
    color: var(--color-primary-blue);
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1023px) {
    .vg-hero {
        padding: 100px 0 20px;
    }

    .vg-layout {
        grid-template-columns: 1fr 260px;
        gap: 28px;
    }

    .vg-sidebar {
        padding: 20px;
    }

    .vg-sidebar__item {
        padding: 8px 12px;
        font-size: 0.85rem;
    }
}

@media (max-width: 767px) {
    .vg-hero {
        padding: 80px 0 16px;
    }

    .vg-layout {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .vg-section {
        padding: 24px 0 60px;
    }

    .vg-sidebar {
        position: static;
        border-radius: 10px;
    }

    .vg-tabs__btn {
        padding: 0.75rem 1rem;
        font-size: var(--fs-small);
    }

    .vg-panel__description {
        margin-bottom: 20px;
    }

    .vg-video {
        border-radius: 8px;
    }
}