/* ====================================
   Projects Page Styles
   ==================================== */

/* Single project detail: fix hero title line-height */
.project-single-hero .hero-main-text {
    line-height: 1.05;
    letter-spacing: -0.02em;
}

/* Single project detail: disable scroll colorization */
.single-project img {
    filter: none !important;
    transition: none !important;
}

/* ====================================
   Filter Bar
   ==================================== */
.filter-bar {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 0;
}

.filter-btn {
    font-family: var(--font-secondary);
    font-size: 0.9rem;
    font-weight: 700;
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--color-steel);
    background: transparent;
    color: var(--color-steel);
    cursor: pointer;
    letter-spacing: 0.05em;
    transition: all var(--transition-base);
    text-transform: uppercase;
}

.filter-btn.active,
.filter-btn:hover {
    background: var(--color-black);
    color: var(--color-white);
    border-color: var(--color-black);
}

/* ====================================
   Projects Grid（統一サイズ）
   ==================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

/* ====================================
   Project Card（top.cssを拡張）
   ==================================== */
.project-card {
    position: relative;
    aspect-ratio: auto;
    background: var(--bg-card-dark);
    overflow: hidden;
    transition: transform var(--transition-base);
}

.project-card.reveal {
    opacity: 1;
    transform: translateY(0);
}

.project-card:hover {
    transform: translateY(-8px);
}

.project-link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.project-img-wrapper {
    aspect-ratio: 16 / 10;
    overflow: hidden;
    position: relative;
}

.project-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%) contrast(1.1);
    transition: filter var(--transition-base), transform var(--transition-slow);
}

.project-card:hover .project-img {
    transform: scale(1.08);
}

.project-info {
    position: static;
    inset: auto;
    background: none;
    display: block;
    opacity: 1;
    color: inherit;
    text-align: left;
    padding: var(--spacing-md);
}

.project-card:hover .project-info {
    opacity: 1;
}

.project-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    color: var(--color-silver);
}

.project-date {
    font-family: var(--font-secondary);
    letter-spacing: 0.05em;
}

.project-category {
    font-family: var(--font-secondary);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.project-title {
    font-size: var(--text-xl);
    font-weight: 900;
    margin-bottom: 0.75rem;
    color: var(--color-white);
}

.project-desc {
    color: var(--color-gray);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.spec-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.spec-tag {
    font-family: var(--font-secondary);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.4rem 0.8rem;
    border: 1px solid var(--color-silver);
    color: var(--color-silver);
    letter-spacing: 0.05em;
}

.spec-tag.highlight {
    background-color: var(--color-white);
    color: var(--color-black);
    border-color: var(--color-white);
}

/* ====================================
   Detail Page Styles
   ==================================== */
.project-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.project-gallery .main-image {
    width: 100%;
    height: auto;
    filter: grayscale(100%) contrast(1.1);
    transition: filter var(--transition-base);
}

.project-details {
    padding: var(--spacing-md);
}

.detail-item {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-steel);
}

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

.detail-item h4 {
    font-size: var(--text-base);
    font-weight: 700;
    color: var(--color-steel);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.detail-item p,
.detail-item ul {
    color: var(--color-black);
    line-height: 1.8;
}

.detail-item ul {
    list-style: none;
    padding-left: 0;
}

.detail-item ul li {
    padding-left: 1.5rem;
    position: relative;
}

.detail-item ul li::before {
    content: "■";
    position: absolute;
    left: 0;
    color: var(--color-steel);
}

/* ====================================
   Responsive
   ==================================== */
@media (max-width: 1024px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .project-detail-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .projects-grid {
        grid-template-columns: 1fr;
    }

    .filter-bar {
        gap: 0.5rem;
    }

    .filter-btn {
        font-size: 0.8rem;
        padding: 0.6rem 1rem;
    }
}

/* ====================================
   Single Project Layout (with sidebar)
   ==================================== */
.single-project-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 3rem;
    align-items: flex-start;
}

/* Sidebar */
.project-sidebar {
    position: sticky;
    top: 2rem;
}

.sidebar-inner {
    border: 1px solid var(--color-border-dark);
    padding: 1.5rem;
}

.sidebar-title {
    font-family: var(--font-secondary);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-gray);
    border-bottom: 2px solid var(--color-steel);
    padding-bottom: 0.75rem;
    margin-bottom: 1.25rem;
}

.sidebar-project-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.sidebar-project-link {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
    text-decoration: none;
    color: var(--color-dark);
    transition: opacity var(--transition-fast);
}

.sidebar-project-link:hover {
    opacity: 0.6;
}

.sidebar-project-img-wrap {
    flex: 0 0 72px;
    height: 54px;
    overflow: hidden;
}

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

.sidebar-project-info {
    flex: 1;
    min-width: 0;
}

.sidebar-project-cat {
    font-size: 0.7rem;
    color: var(--color-gray);
    display: block;
    margin-bottom: 0.2rem;
}

.sidebar-project-title {
    font-size: 0.85rem;
    font-weight: 700;
    line-height: 1.4;
    color: var(--color-dark);
}

.sidebar-empty {
    font-size: 0.85rem;
    color: var(--color-gray);
}

/* Sidebar item divider */
.sidebar-project-item + .sidebar-project-item {
    padding-top: 1rem;
    border-top: 1px solid var(--color-border-dark);
}

@media (max-width: 1024px) {
    .single-project-layout {
        grid-template-columns: 1fr;
    }

    .project-sidebar {
        position: static;
    }
}