/* =====================================================================
   SelfLearnHub — Blog (Phase 10.5)
   Стили витрины блога: grid layout, карточки, sidebar (календарь + recent).
   Подключается в _Layout.cshtml как ~/css/blog.css.
   ===================================================================== */

/* === Layout: main + sidebar === */
.blog-grid {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
    gap: 2rem;
    align-items: start;
}

.blog-grid__main { min-width: 0; }

.blog-grid__sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    position: sticky;
    top: 1rem;
}

@media (max-width: 900px) {
    .blog-grid {
        grid-template-columns: 1fr;
    }
    .blog-grid__sidebar {
        position: static;
    }
}

/* === Card === */
.blog-card {
    background: var(--blog-surface, #fff);
    border: 1px solid var(--blog-border, #e1e4e8);
    border-radius: 8px;
    margin-bottom: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    transition: box-shadow 0.2s ease, transform 0.2s ease;
    overflow: hidden;
}

.blog-card:hover {
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.blog-card__cover {
    width: 100%;
    height: 240px;
    overflow: hidden;
    background: #f5f5f5;
    display: block;
}

.blog-card__cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.blog-card__header { padding: 1rem 1.5rem 0.5rem; }

.blog-card__title {
    font-size: 1.4rem;
    margin: 0 0 0.5rem;
    line-height: 1.3;
}

.blog-card__title a {
    color: #24292e;
    text-decoration: none;
}

.blog-card__title a:hover {
    color: #0366d6;
    text-decoration: underline;
}

.blog-card__meta {
    display: flex;
    gap: 0.75rem 1rem;
    flex-wrap: wrap;
    color: #586069;
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
}

.blog-card__date::before { content: "📅 "; }
.blog-card__category::before { content: "📂 "; }
.blog-card__level::before { content: "📊 "; }

.blog-card__level[data-level="Easy"] { color: #28a745; }
.blog-card__level[data-level="Medium"] { color: #d29922; }
.blog-card__level[data-level="Hard"] { color: #d73a49; }

.blog-card__excerpt {
    padding: 0 1.5rem 1rem;
    color: #24292e;
    line-height: 1.55;
    font-size: 0.95rem;
}

.blog-card__footer {
    padding: 0 1.5rem 1.25rem;
}

.blog-card__read-more {
    color: #0366d6;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
}

.blog-card__read-more {
    color: #0366d6; text-decoration: none; font-weight: 500;
}
.blog-card__read-more:hover { text-decoration: underline; }

/* === Tags (Phase 10.9) === */
.blog-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    padding: 0 1.5rem;
    margin-bottom: 0.5rem;
}

.blog-tag-badge {
    display: inline-block;
    padding: 0.125rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 500;
    color: #586069;
    background: #f1f8ff;
    border: 1px solid #c8e1ff;
    border-radius: 12px;
    text-decoration: none;
    line-height: 1.4;
    transition: background 0.15s ease, color 0.15s ease;
}

.blog-tag-badge:hover {
    background: #ddeeff;
    color: #0366d6;
}

.blog-tag-badge--active {
    background: #0366d6;
    color: #fff;
    border-color: #0366d6;
}

.blog-list__active-filter {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0.5rem 0;
    padding: 0.5rem 0.75rem;
    background: #f6f8fa;
    border-radius: 6px;
    font-size: 0.875rem;
}

.blog-list__filter-label {
    color: #586069;
    font-weight: 500;
}

.blog-list__clear-filter {
    margin-left: auto;
    color: #586069;
    text-decoration: none;
    font-size: 0.8125rem;
}

.blog-list__clear-filter:hover {
    color: #d73a49;
    text-decoration: underline;
}
/* === Sidebar shared === */
.blog-sidebar-section {
    background: var(--blog-surface, #fff);
    border: 1px solid var(--blog-border, #e1e4e8);
    border-radius: 8px;
    padding: 1rem 1.25rem;
}

.text-muted {
    color: #6a737d;
    font-size: 0.875rem;
    margin: 0.5rem 0;
}

/* === Calendar === */
.blog-calendar { background: transparent; border: none; padding: 0; }

.blog-calendar__nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.blog-calendar__title {
    text-align: center;
    margin: 0;
    font-size: 1.05rem;
    flex: 1;
}

.blog-calendar__nav-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border-radius: 4px;
    background: #f6f8fa;
    color: #24292e;
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: 700;
    line-height: 1;
    transition: background 0.15s ease;
}

.blog-calendar__nav-btn:hover {
    background: #e1e4e8;
    color: #0366d6;
}

.blog-calendar__today-link {
    display: block;
    text-align: center;
    margin-bottom: 0.5rem;
    font-size: 0.8rem;
    color: #0366d6;
    text-decoration: none;
}

.blog-calendar__today-link:hover {
    text-decoration: underline;
}

.blog-calendar__grid {
    width: 100%;
    border-collapse: collapse;
    table-layout: fixed;
}

.blog-calendar__weekday {
    text-align: center;
    padding: 0.4rem 0;
    color: #586069;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
}

.blog-calendar__day {
    text-align: center;
    padding: 0.4rem 0;
    font-size: 0.85rem;
    border: 1px solid transparent;
    border-radius: 4px;
    transition: background 0.15s ease;
}

.blog-calendar__day--empty {
    background: transparent;
    border: none;
}

.blog-calendar__day--published {
    border-bottom: 2px solid #0366d6; /* подчёркнутый день */
    background: #f1f8ff;
    font-weight: 500;
}

.blog-calendar__day--today {
    background: #fff5b1;
    font-weight: 700;
    border: 1px solid #f1c40f;
}

.blog-calendar__day--published.blog-calendar__day--today {
    background: #ffeb99;
    border-bottom: 2px solid #0366d6;
}

.blog-calendar__day-link {
    display: block;
    color: #0366d6;
    text-decoration: none;
}

.blog-calendar__day-link:hover {
    text-decoration: underline;
    color: #0246a8;
}

.blog-calendar__empty {
    text-align: center;
    margin-top: 0.75rem;
}

/* === Recent posts === */
.blog-recent { background: transparent; border: none; padding: 0; }
.blog-recent__title { margin: 0 0 0.75rem; font-size: 1.05rem; }

.blog-recent__list { list-style: none; padding: 0; margin: 0; }

.blog-recent__item {
    padding: 0.5rem 0;
    border-bottom: 1px solid #f0f0f0;
}

.blog-recent__item:last-child { border-bottom: none; }

.blog-recent__link {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    text-decoration: none;
    color: #24292e;
}

.blog-recent__link:hover .blog-recent__post-title {
    color: #0366d6;
    text-decoration: underline;
}

.blog-recent__post-title {
    font-weight: 500;
    font-size: 0.95rem;
    line-height: 1.3;
}

.blog-recent__meta {
    font-size: 0.75rem;
    color: #586069;
    display: flex;
    gap: 0.5rem;
}

.blog-recent__level[data-level="Easy"] { color: #28a745; }
.blog-recent__level[data-level="Medium"] { color: #d29922; }
.blog-recent__level[data-level="Hard"] { color: #d73a49; }