/* 주간 국민보 온라인 신문 스타일 */

:root {
    /* 모던 모드 색상 */
    --modern-bg: #ffffff;
    --modern-text: #1a1a1a;
    --modern-secondary: #666666;
    --modern-border: #e0e0e0;
    --modern-accent: #ef4444;

    /* 레트로 모드 색상 (빈티지 신문) */
    --retro-bg: #e8dcc8;
    --retro-paper: #f5ead5;
    --retro-text: #3d2817;
    --retro-ink: #2a1810;
    --retro-border: #b8a88a;
    --retro-accent: #6b4423;

    /* 기본값은 모던 */
    --bg-primary: var(--modern-bg);
    --bg-secondary: #f9fafb;
    --text-primary: var(--modern-text);
    --text-secondary: var(--modern-secondary);
    --border-color: var(--modern-border);
    --accent-color: var(--modern-accent);
}

/* 레트로 모드 - 빈티지 신문 스타일 (이미지 참고) */
body.retro-mode {
    --bg-primary: var(--retro-bg);
    --bg-secondary: var(--retro-paper);
    --text-primary: var(--retro-text);
    --text-secondary: var(--retro-ink);
    --border-color: var(--retro-border);
    --accent-color: var(--retro-accent);

    font-family: 'Nanum Myeongjo', 'Batang', serif;

    /* 빈티지 신문지 텍스처 - 이미지와 유사하게 */
    background-color: #e8dcc8;
    background-image:
        /* 가장자리 비네팅 효과 (어두운 테두리) */
        radial-gradient(ellipse at center, transparent 0%, transparent 60%, rgba(80, 50, 30, 0.15) 100%),
        /* 큰 얼룩들 (커피 자국, 시간 변색) */
        radial-gradient(ellipse at 12% 18%, rgba(120, 85, 60, 0.12) 0%, transparent 35%),
        radial-gradient(ellipse at 88% 75%, rgba(140, 100, 65, 0.10) 0%, transparent 40%),
        radial-gradient(ellipse at 35% 88%, rgba(110, 80, 55, 0.09) 0%, transparent 30%),
        radial-gradient(ellipse at 75% 15%, rgba(130, 95, 60, 0.08) 0%, transparent 32%),
        radial-gradient(ellipse at 50% 45%, rgba(125, 90, 58, 0.06) 0%, transparent 50%),
        /* 작은 얼룩들 */
        radial-gradient(circle at 25% 60%, rgba(100, 70, 45, 0.08) 0%, transparent 15%),
        radial-gradient(circle at 65% 35%, rgba(105, 75, 50, 0.07) 0%, transparent 12%),
        radial-gradient(circle at 80% 50%, rgba(95, 65, 42, 0.06) 0%, transparent 10%),
        /* 종이 섬유질 텍스처 */
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(0,0,0,0.025) 2px,
            rgba(0,0,0,0.025) 3px
        ),
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 2px,
            rgba(0,0,0,0.018) 2px,
            rgba(0,0,0,0.018) 3px
        ),
        /* 종이 노이즈 */
        url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200"><filter id="noise"><feTurbulence type="fractalNoise" baseFrequency="0.95" numOctaves="5" stitchTiles="stitch"/></filter><rect width="100%" height="100%" filter="url(%23noise)" opacity="0.06"/></svg>');
    background-blend-mode: multiply, multiply, multiply, multiply, multiply, multiply, multiply, multiply, multiply, normal, normal, normal;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Serif KR', 'Nanum Myeongjo', serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.8;
    transition: background 0.3s, color 0.3s;
}

.retro-mode body {
    font-family: 'Nanum Myeongjo', 'Batang', serif;
}

/* 헤더 */
.newspaper-header {
    background: var(--bg-primary);
    border-bottom: 3px solid var(--accent-color);
    padding: 24px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.retro-mode .newspaper-header {
    border-bottom: 2px double var(--border-color);
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);

    /* 헤더에 오래된 종이 효과 */
    background: var(--retro-paper);
    position: relative;
}

.retro-mode .newspaper-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    background:
        radial-gradient(ellipse at 10% 30%, rgba(120, 85, 60, 0.10) 0%, transparent 40%),
        radial-gradient(ellipse at 90% 70%, rgba(140, 100, 65, 0.08) 0%, transparent 35%);
    box-shadow: inset 0 0 150px rgba(80, 50, 30, 0.05);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.newspaper-title {
    text-align: center;
    flex: 1;
}

.title-main {
    font-size: 48px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
    letter-spacing: 8px;
}

.retro-mode .title-main {
    font-size: 52px;
    font-weight: 900;
    letter-spacing: 12px;
    text-shadow: 2px 2px 0 rgba(0,0,0,0.1);
}

.title-sub {
    font-size: 14px;
    color: var(--text-secondary);
    letter-spacing: 2px;
}

.retro-mode .title-sub {
    font-size: 16px;
    letter-spacing: 4px;
}

.header-actions {
    display: flex;
    gap: 12px;
}

.mode-toggle {
    padding: 10px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.mode-toggle:hover {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

/* 컨테이너 */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 24px;
}

/* 연도 네비게이션 */
.year-nav {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 32px;
}

.retro-mode .year-nav {
    border-radius: 4px;
    border: 2px solid var(--border-color);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.05);

    /* 네비게이션에 종이 얼룩 */
    background: var(--retro-paper);
    position: relative;
}

.retro-mode .year-nav::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    background:
        radial-gradient(ellipse at 80% 15%, rgba(120, 85, 60, 0.08) 0%, transparent 45%),
        radial-gradient(ellipse at 20% 80%, rgba(110, 80, 55, 0.06) 0%, transparent 40%);
}

.year-nav-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.year-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 12px;
}

.year-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    color: var(--text-primary);
}

.year-card:hover {
    border-color: var(--accent-color);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transform: translateY(-2px);
}

.year-card.active {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.year-number {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 4px;
}

.year-info {
    font-size: 12px;
    color: var(--text-secondary);
}

.year-card.active .year-info {
    color: rgba(255,255,255,0.9);
}

/* 발행일 그리드 */
.issues-section {
    margin-bottom: 40px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-color);
}

.section-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
}

.issues-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.issue-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    color: var(--text-primary);
}

.retro-mode .issue-card,
.retro-mode .year-card,
.retro-mode .article-card {
    border-radius: 4px;
    box-shadow: 2px 2px 8px rgba(0,0,0,0.1);

    /* 카드에 빈티지 종이 효과 */
    background: var(--retro-paper);
    position: relative;
    overflow: hidden;
}

.retro-mode .issue-card::before,
.retro-mode .year-card::before,
.retro-mode .article-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    background:
        /* 가장자리 어둡게 */
        radial-gradient(ellipse at center, transparent 30%, rgba(80, 50, 30, 0.08) 100%),
        radial-gradient(ellipse at 75% 25%, rgba(120, 85, 60, 0.07) 0%, transparent 45%),
        radial-gradient(ellipse at 25% 75%, rgba(140, 100, 65, 0.06) 0%, transparent 40%);
    box-shadow: inset 0 0 60px rgba(80, 50, 30, 0.04);
}

.retro-mode .issue-card:hover,
.retro-mode .year-card:hover {
    box-shadow: 4px 4px 12px rgba(0,0,0,0.15);
}

.issue-card:hover {
    border-color: var(--accent-color);
    box-shadow: 0 8px 16px rgba(0,0,0,0.15);
    transform: translateY(-4px);
}

.issue-date {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--accent-color);
}

.retro-mode .issue-date {
    font-size: 24px;
    letter-spacing: 2px;
}

.issue-meta {
    font-size: 14px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.issue-thumbnail {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: 8px;
    margin-top: 12px;
    border: 1px solid var(--border-color);
}

.retro-mode .issue-thumbnail {
    border-radius: 2px;
    filter: sepia(20%);
}

/* 기사 목록 */
.articles-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.article-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    transition: all 0.2s;
    cursor: pointer;
}

.retro-mode .article-card {
    border-radius: 4px;
    border-left: 4px solid var(--accent-color);
}

.article-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.article-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
    line-height: 1.4;
}

.retro-mode .article-title {
    font-size: 24px;
    letter-spacing: 1px;
}

.article-preview {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 12px;
    max-height: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.article-meta {
    display: flex;
    gap: 16px;
    font-size: 13px;
    color: var(--text-secondary);
}

/* 로딩 */
.loading {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.loading i {
    font-size: 48px;
    margin-bottom: 16px;
}

/* 반응형 */
@media (max-width: 768px) {
    .title-main {
        font-size: 32px;
        letter-spacing: 4px;
    }

    .retro-mode .title-main {
        font-size: 36px;
        letter-spacing: 6px;
    }

    .year-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 8px;
    }

    .issues-grid {
        grid-template-columns: 1fr;
    }
}