/* =============================================================
 * Ryukio Widget – Shared CSS (ryukio-shared.css)
 * 모든 스킨이 공통으로 로드하는 스타일시트.
 * 2026 트렌드: Liquid Glass · Jelly Animation · Glassmorphism
 * ============================================================= */

/* ── 1. CSS Reset & Base ─────────────────────────────────── */
.ryukio-widget *,
.ryukio-widget *::before,
.ryukio-widget *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

.ryukio-widget {
    /* 2026 기본 팔레트 (JS/PHP inline override 가능) */
    --ryw-color-title:   #1a1a2e;
    --ryw-color-content: #4a4a6a;
    --ryw-color-accent:  #6C63FF;
    --ryw-color-accent2: #FF6B9D;
    --ryw-glass-bg:      rgba(255, 255, 255, 0.15);
    --ryw-blur:          18px;
    --ryw-radius:        20px;
    --ryw-jelly-tension: 1.0;

    /* 파생 변수 */
    --ryw-shadow:        0 8px 32px rgba(108, 99, 255, 0.12);
    --ryw-border-glass:  1px solid rgba(255, 255, 255, 0.35);
    --ryw-transition:    all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);

    font-family: 'Pretendard', 'Noto Sans KR', -apple-system, BlinkMacSystemFont,
                 'Segoe UI', sans-serif;
    color: var(--ryw-color-content);
    line-height: 1.6;
    position: relative;
    overflow: hidden;
}

/* ── 2. Liquid Glass 배경 ────────────────────────────────── */
.ryukio-glass-wrap {
    position: relative;
    border-radius: var(--ryw-radius);
    overflow: hidden;
}

/* 배경 이미지 레이어 */
.ryukio-glass-wrap .ryw-bg-layer {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    z-index: 0;
    transform: scale(1.05); /* 블러 가장자리 가림 */
    filter: blur(var(--ryw-blur));
}

/* 글래스 오버레이 */
.ryukio-glass-wrap .ryw-glass-overlay {
    position: absolute;
    inset: 0;
    background: var(--ryw-glass-bg);
    backdrop-filter: blur(var(--ryw-blur)) saturate(180%);
    -webkit-backdrop-filter: blur(var(--ryw-blur)) saturate(180%);
    border: var(--ryw-border-glass);
    border-radius: var(--ryw-radius);
    z-index: 1;
}

/* 콘텐츠 레이어 */
.ryukio-glass-wrap .ryw-content-layer {
    position: relative;
    z-index: 2;
}

/* ── 3. 카드 공통 ────────────────────────────────────────── */
.ryw-card {
    background: var(--ryw-glass-bg);
    backdrop-filter: blur(calc(var(--ryw-blur) * 0.6)) saturate(160%);
    -webkit-backdrop-filter: blur(calc(var(--ryw-blur) * 0.6)) saturate(160%);
    border: var(--ryw-border-glass);
    border-radius: var(--ryw-radius);
    box-shadow: var(--ryw-shadow);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    display: block;
    transition: var(--ryw-transition);
    will-change: transform;
}

/* ── 4. Jelly (Elastic) 애니메이션 ──────────────────────── */
.ryukio-widget.jelly-on .ryw-card:hover,
.ryukio-widget.jelly-on .ryw-card:focus-within {
    transform: scale(1.03) translateY(-4px);
    box-shadow: 0 20px 48px rgba(108, 99, 255, 0.22);
}

/* 젤리 탄성: CSS custom property 기반 */
.ryukio-widget.jelly-on .ryw-card {
    transition: transform 0.5s cubic-bezier(0.34, calc(1.3 * var(--ryw-jelly-tension)), 0.64, 1),
                box-shadow 0.4s ease,
                filter 0.3s ease;
}

/* 클릭 시 눌리는 효과 */
.ryukio-widget.jelly-on .ryw-card:active {
    transform: scale(0.97) translateY(0px);
    transition: transform 0.12s ease;
}

/* ── 5. 썸네일 공통 ─────────────────────────────────────── */
.ryw-thumb {
    width: 100%;
    aspect-ratio: 3 / 2;
    object-fit: cover;
    display: block;
    background-color: rgba(108, 99, 255, 0.08);
    transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.ryw-card:hover .ryw-thumb {
    transform: scale(1.06);
}

.ryw-thumb-wrap {
    overflow: hidden;
    border-radius: var(--ryw-radius) var(--ryw-radius) 0 0;
    flex-shrink: 0;
}

/* ── 6. 텍스트 요소 공통 ─────────────────────────────────── */
.ryw-category {
    display: inline-block;
    background: linear-gradient(135deg, var(--ryw-color-accent), var(--ryw-color-accent2));
    color: #fff;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 2px 10px;
    border-radius: 50px;
    margin-bottom: 6px;
}

.ryw-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--ryw-color-title);
    line-height: 1.4;
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.ryw-summary {
    font-size: 0.85rem;
    color: var(--ryw-color-content);
    line-height: 1.55;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 8px;
}

.ryw-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    color: var(--ryw-color-content);
    opacity: 0.75;
}

.ryw-meta span {
    display: flex;
    align-items: center;
    gap: 3px;
}

/* ── 7. 더보기 버튼 ──────────────────────────────────────── */
.ryw-loadmore-wrap {
    text-align: center;
    margin-top: 24px;
}

.ryw-btn-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 12px 32px;
    background: linear-gradient(135deg, var(--ryw-color-accent), var(--ryw-color-accent2));
    color: #fff;
    font-size: 0.9rem;
    font-weight: 700;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    text-decoration: none;
    box-shadow: 0 4px 20px rgba(108, 99, 255, 0.35);
    transition: var(--ryw-transition);
    letter-spacing: 0.04em;
}

.ryukio-widget.jelly-on .ryw-btn-more:hover {
    transform: scale(1.05) translateY(-2px);
    box-shadow: 0 8px 28px rgba(108, 99, 255, 0.5);
}

.ryukio-widget.jelly-on .ryw-btn-more:active {
    transform: scale(0.97);
}

.ryw-btn-more:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* AJAX 로딩 스피너 */
.ryw-btn-more.loading::after {
    content: '';
    width: 14px;
    height: 14px;
    border: 2px solid rgba(255,255,255,0.5);
    border-top-color: #fff;
    border-radius: 50%;
    display: inline-block;
    animation: ryw-spin 0.7s linear infinite;
}

@keyframes ryw-spin {
    to { transform: rotate(360deg); }
}

/* ── 8. 빈 상태 표시 ─────────────────────────────────────── */
.ryw-empty {
    padding: 48px 24px;
    text-align: center;
    color: var(--ryw-color-content);
    opacity: 0.55;
    font-size: 0.9rem;
}

/* ── 9. 반응형 그리드 헬퍼 ──────────────────────────────── */
.ryw-grid {
    display: grid;
    gap: 18px;
}

.ryw-grid-1 { grid-template-columns: 1fr; }
.ryw-grid-2 { grid-template-columns: repeat(2, 1fr); }
.ryw-grid-3 { grid-template-columns: repeat(3, 1fr); }
.ryw-grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
    .ryw-grid-4 { grid-template-columns: repeat(3, 1fr); }
    .ryw-grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .ryw-grid-4,
    .ryw-grid-3,
    .ryw-grid-2 { grid-template-columns: 1fr; }
    .ryw-title   { font-size: 0.95rem; }
}

/* ── 10. 스킨별 패딩 래퍼 ───────────────────────────────── */
.ryw-inner {
    padding: 24px;
}

@media (max-width: 480px) {
    .ryw-inner { padding: 16px; }
}