/* ============================================
   子页面通用样式 (projects.html / notes.html)
   ============================================ */

/* Page Navigation */
.page-nav {
    padding: 20px 0 0;
}

.page-nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.page-nav__back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-muted);
    text-decoration: none;
    padding: 6px 0;
    transition: color var(--transition-fast);
}

.page-nav__back svg {
    width: 16px;
    height: 16px;
}

.page-nav__back:hover {
    color: var(--color-accent);
}

.page-nav__back:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: 4px;
}

.page-nav__current {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
}

/* Page Header */
.page-header {
    padding: 40px 0 60px;
    text-align: center;
}

.page-header__title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.2;
    margin-bottom: 12px;
}

.page-header__subtitle {
    font-size: 1rem;
    color: var(--color-muted);
}

/* Visually Hidden (for screen readers) */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================
   Projects List Page
   ============================================ */
.projects-list {
    padding: 0 0 80px;
}

.project-detail {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 32px;
    padding: 32px 0;
    border-bottom: 1px solid var(--color-border);
}

.project-detail:first-child {
    padding-top: 0;
}

.project-detail:last-child {
    border-bottom: none;
}

.project-detail__image { width: 100%; aspect-ratio: 4 / 3; background-color: var(--color-avatar-bg); border-radius: var(--radius-card); display: flex; align-items: center; justify-content: center; overflow: hidden; }
.project-detail__image img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--transition-base); }
.project-detail:hover .project-detail__image img { transform: scale(1.02); }
.project-detail__placeholder { color: var(--color-muted); opacity: 0.4; }
.project-detail__placeholder svg { width: 48px; height: 48px; }

.project-detail__title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 12px;
}

.project-detail__desc {
    font-size: 0.9375rem;
    color: var(--color-muted);
    line-height: 1.7;
    margin-bottom: 20px;
}

.project-detail__meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.project-detail__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.project-detail__year {
    font-size: 0.875rem;
    color: var(--color-muted);
    font-weight: 500;
}

/* ============================================
   Notes List Page
   ============================================ */
.notes-list {
    padding: 0 0 80px;
}

.note-item {
    padding: 28px 0;
    border-bottom: 1px solid var(--color-border);
}

.note-item:first-child {
    padding-top: 0;
}

.note-item:last-child {
    border-bottom: none;
}

.note-item__date {
    display: block;
    font-size: 0.8125rem;
    color: var(--color-muted);
    margin-bottom: 8px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.note-item__title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 10px;
    line-height: 1.4;
}

.note-item__link {
    color: var(--color-text);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.note-item__link:hover {
    color: var(--color-accent);
}

.note-item__link:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: 2px;
}

.note-item__excerpt {
    font-size: 0.9375rem;
    color: var(--color-muted);
    line-height: 1.7;
    margin-bottom: 14px;
}

.note-item__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 640px) {
    .page-header {
        padding: 24px 0 40px;
    }

    .project-detail {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 24px 0;
    }

    .project-detail__image {
        aspect-ratio: 16 / 10;
    }

    .project-detail__meta {
        flex-direction: column;
        align-items: flex-start;
    }

    .note-item {
        padding: 20px 0;
    }

    .note-item__title {
        font-size: 1rem;
    }
}

@media (min-width: 641px) and (max-width: 1023px) {
    .project-detail {
        grid-template-columns: 220px 1fr;
        gap: 24px;
    }
}