@import url('https://fonts.googleapis.com/css2?family=Paytone+One&family=Be+Vietnam+Pro:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');

/* ===== Guards: chống tràn ngang + ảnh co giãn ===== */
html, body { overflow-x: hidden; }
img { max-width: 100%; height: auto; }

/* ============================================================
   MOSS & SAND — Pinterest-style waterfall theme (Moban 8-10-12)
   ============================================================ */
:root {
    --moss: #7A8450;
    --moss-deep: #5C643B;
    --moss-ink: #3C4228;
    --sand: #D8C9A3;
    --sand-soft: #EDE4CC;
    --cream: #FAF7F0;
    --card: #FFFDF8;
    --line: rgba(122, 132, 80, 0.18);
    --line-strong: rgba(122, 132, 80, 0.35);
    --radius: 12px;
    --font-display: 'Paytone One', 'Be Vietnam Pro', sans-serif;
    --font-body: 'Be Vietnam Pro', 'Roboto', sans-serif;
    --shadow-soft: 0 6px 24px rgba(60, 66, 40, 0.08);
    --shadow-lift: 0 14px 34px rgba(60, 66, 40, 0.16);
}

*, *::before, *::after { box-sizing: border-box; }

body {
    background-color: var(--cream);
    background-image:
        radial-gradient(circle at 12% 8%, rgba(216, 201, 163, 0.28) 0, transparent 34%),
        radial-gradient(circle at 88% 30%, rgba(122, 132, 80, 0.10) 0, transparent 40%),
        radial-gradient(circle at 30% 90%, rgba(216, 201, 163, 0.20) 0, transparent 38%);
    background-attachment: fixed;
    color: var(--moss-ink);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.65;
}

a { color: var(--moss-deep); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--moss); }

.container { width: 100%; max-width: 1280px; margin: 0 auto; padding: 0 20px; }

/* ===== Thanh tiến trình đọc (trên cùng) ===== */
.reading-progress {
    position: fixed; top: 0; left: 0; right: 0; height: 4px;
    background: rgba(122, 132, 80, 0.12); z-index: 999;
}
.reading-progress-bar {
    display: block; height: 100%; width: 0%;
    background: linear-gradient(90deg, var(--moss) 0%, var(--sand) 100%);
    border-radius: 0 4px 4px 0;
    transition: width .08s linear;
}

/* ===== Header ===== */
.site-header {
    position: sticky; top: 4px; z-index: 90;
    background: rgba(250, 247, 240, 0.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
}
.header-inner {
    display: flex; align-items: center; gap: 24px;
    padding: 14px 0;
}
.site-logo { flex-shrink: 0; }
.logo-img { max-height: 48px; width: auto; display: block; }

.mobile-nav { display: none; }

.header-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }

.nav-toggle {
    display: none; background: none; border: 1px solid var(--line-strong);
    border-radius: var(--radius); width: 42px; height: 42px;
    cursor: pointer; position: relative;
}
.nav-toggle-icon, .nav-toggle-icon::before, .nav-toggle-icon::after {
    content: ''; display: block; width: 20px; height: 2px;
    background: var(--moss-deep); margin: 0 auto; border-radius: 2px;
    transition: transform .25s ease;
}
.nav-toggle-icon::before { transform: translateY(-6px); }
.nav-toggle-icon::after { transform: translateY(4px); }
.nav-toggle.is-open .nav-toggle-icon { background: transparent; }
.nav-toggle.is-open .nav-toggle-icon::before { transform: rotate(45deg); }
.nav-toggle.is-open .nav-toggle-icon::after { transform: rotate(-45deg); }

/* ===== Nút ===== */
.btn {
    display: inline-block; padding: 10px 22px; border-radius: var(--radius);
    font-family: var(--font-body); font-weight: 700; font-size: 14px;
    border: 1px solid transparent; cursor: pointer; text-align: center;
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-soft); }
.btn-cta { background: var(--moss); color: #FFFDF8; border-color: var(--moss-deep); }
.btn-cta:hover { background: var(--moss-deep); color: #FFFDF8; }
.btn-outline { background: transparent; color: var(--moss-deep); border-color: var(--line-strong); }
.btn-outline:hover { background: var(--sand-soft); color: var(--moss-ink); }
.btn-login { background: transparent; color: var(--moss-deep); border-color: var(--line-strong); }
.btn-login:hover { background: var(--sand-soft); }
.btn-register { background: var(--sand); color: var(--moss-ink); border-color: var(--sand); }
.btn-register:hover { background: #cbb98d; }
.btn-sm { padding: 7px 16px; font-size: 13px; }
.btn-block { display: block; width: 100%; }

/* ===== Bố cục 2 cột: nội dung + sidebar dán dính ===== */
.layout-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    grid-template-areas: "main side";
    gap: 32px;
    padding: 32px 0 60px;
    align-items: start;
}
.main-col { grid-area: main; min-width: 0; }
.side-col { grid-area: side; min-width: 0; }
.side-stick { position: sticky; top: 96px; display: grid; gap: 20px; }

/* ===== Thẻ sidebar ===== */
.side-card {
    background: var(--card); border: 1px solid var(--line);
    border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow-soft);
}
.side-card-title {
    font-family: var(--font-display); font-size: 15px; letter-spacing: .06em;
    text-transform: uppercase; color: var(--moss-deep);
    margin: 0 0 14px; padding-bottom: 10px; border-bottom: 1px dashed var(--line-strong);
}
.side-nav .nav-menu, .mobile-nav .nav-menu { list-style: none; margin: 0; padding: 0; }
.side-nav .nav-menu li a {
    display: block; padding: 9px 12px; border-radius: 10px;
    font-weight: 600; font-size: 14px; color: var(--moss-ink);
    transition: background .2s ease, padding-left .2s ease;
}
.side-nav .nav-menu li a:hover,
.side-nav .nav-menu li.current-menu-item a {
    background: var(--sand-soft); padding-left: 18px; color: var(--moss-deep);
}
.side-cta-card {
    background: linear-gradient(160deg, var(--moss) 0%, var(--moss-deep) 100%);
    border-color: var(--moss-deep); text-align: center; color: #FFFDF8;
}
.side-cta-leaf { font-size: 22px; color: var(--sand); }
.side-cta-title { font-family: var(--font-display); font-size: 20px; margin: 8px 0 6px; color: #FFFDF8; }
.side-cta-desc { font-size: 13px; opacity: .85; margin: 0 0 14px; }
.side-cta-img { border-radius: 10px; border: 1px solid rgba(216, 201, 163, .4); margin-bottom: 14px; }
.side-cta-card .btn-cta { background: var(--sand); color: var(--moss-ink); border-color: var(--sand); }
.side-cta-card .btn-cta:hover { background: #cbb98d; }
.side-popular { list-style: none; margin: 0; padding: 0; }
.side-popular li { padding: 8px 0; border-bottom: 1px dotted var(--line); font-size: 14px; }
.side-popular li:last-child { border-bottom: 0; }
.side-popular li a::before { content: '✦ '; color: var(--sand); }

/* ===== Hero banner ===== */
.hero-board {
    position: relative; border-radius: var(--radius); overflow: hidden;
    border: 1px solid var(--line); box-shadow: var(--shadow-soft); margin-bottom: 40px;
}
.hero-board-media img { display: block; width: 100%; aspect-ratio: 21 / 8; object-fit: cover; }
.hero-board-caption {
    position: absolute; inset: auto 0 0 0; padding: 34px 30px 26px;
    background: linear-gradient(180deg, transparent 0%, rgba(60, 66, 40, 0.82) 100%);
    color: #FFFDF8;
}
.hero-tag {
    display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: .12em;
    text-transform: uppercase; background: var(--sand); color: var(--moss-ink);
    padding: 4px 12px; border-radius: 999px; margin-bottom: 10px;
}
.hero-title { font-family: var(--font-display); font-size: clamp(24px, 4vw, 40px); margin: 0 0 8px; color: #FFFDF8; }
.hero-desc { margin: 0 0 16px; max-width: 560px; opacity: .9; font-size: 15px; }

/* ===== Tiêu đề khối ===== */
.board-section { margin-bottom: 48px; }
.board-title {
    font-family: var(--font-display); font-size: clamp(20px, 3vw, 28px);
    color: var(--moss-deep); margin: 0 0 22px; position: relative; padding-left: 18px;
}
.board-title::before {
    content: ''; position: absolute; left: 0; top: 8px; bottom: 8px; width: 6px;
    border-radius: 4px; background: linear-gradient(180deg, var(--moss), var(--sand));
}
.board-more { text-align: center; margin-top: 26px; }

/* ===== Thác nước masonry ===== */
.masonry {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-auto-rows: 8px;
    gap: 20px;
    align-items: start;
}
.masonry > * { min-width: 0; }
.masonry-poster { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.m-card {
    background: var(--card); border: 1px solid var(--line);
    border-radius: var(--radius); overflow: hidden;
    box-shadow: var(--shadow-soft);
    transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.m-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lift); border-color: var(--line-strong); }

.m-card-media { display: block; overflow: hidden; }
.m-card-media img {
    display: block; width: 100%; height: 100%; object-fit: cover;
    aspect-ratio: 4 / 3; transition: transform .4s ease;
}
.m-card-media.m-ratio-tall img { aspect-ratio: 3 / 4; }
.m-card-media.m-ratio-short img { aspect-ratio: 16 / 10; }
.m-card:hover .m-card-media img { transform: scale(1.05); }

.m-card-body { padding: 16px 18px 18px; }
.m-card-title { font-family: var(--font-display); font-size: 17px; line-height: 1.35; margin: 0 0 8px; color: var(--moss-ink); }
.m-card-title a { color: inherit; }
.m-card-title a:hover { color: var(--moss); }
.m-card-rating { color: #C99A2C; font-size: 13px; font-weight: 700; margin-bottom: 12px; }
.m-card-excerpt { font-size: 14px; color: #6B7053; margin: 0 0 10px; }
.m-card-date { font-size: 12px; color: #9a9478; letter-spacing: .04em; }

/* ===== Trang chuyên mục (archive) ===== */
.archive-board {
    background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
    padding: 30px 32px; margin-bottom: 34px; box-shadow: var(--shadow-soft);
}
.archive-tag {
    font-size: 12px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
    color: var(--sand); background: var(--moss-deep); padding: 4px 12px; border-radius: 999px;
}
.archive-title { font-family: var(--font-display); font-size: clamp(24px, 3.5vw, 36px); color: var(--moss-deep); margin: 14px 0 6px; }
.archive-desc { color: #6B7053; }

/* ===== Trang bài viết (single) ===== */
.post-board {
    background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
    padding: 34px 38px; box-shadow: var(--shadow-soft); margin-bottom: 30px;
}
.post-cats { margin-bottom: 12px; }
.post-cats a {
    display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: .08em;
    background: var(--sand-soft); color: var(--moss-deep); padding: 4px 12px;
    border-radius: 999px; border: 1px solid var(--line); margin-right: 6px;
}
.post-board-title { font-family: var(--font-display); font-size: clamp(26px, 4vw, 40px); line-height: 1.25; color: var(--moss-ink); margin: 0 0 12px; }
.post-board-meta { display: flex; gap: 18px; font-size: 13px; color: #6B7053; margin-bottom: 22px; }
.post-board-cover { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); margin-bottom: 26px; }
.post-board-cover img { display: block; width: 100%; }
.post-board-content { font-size: 17px; line-height: 1.8; }
.post-board-content h2, .post-board-content h3 { font-family: var(--font-display); color: var(--moss-deep); }
.post-board-content img { border-radius: var(--radius); }
.post-board-content blockquote {
    border-left: 4px solid var(--sand); background: var(--sand-soft);
    margin: 20px 0; padding: 16px 22px; border-radius: 0 var(--radius) var(--radius) 0;
}
.post-tags { margin-bottom: 20px; }
.post-tags a {
    display: inline-block; font-size: 12px; background: var(--sand-soft);
    border: 1px solid var(--line); border-radius: 999px; padding: 4px 12px; margin: 0 6px 6px 0;
}
.post-download-cta {
    background: linear-gradient(140deg, var(--moss) 0%, var(--moss-deep) 100%);
    border-radius: var(--radius); color: #FFFDF8; padding: 26px 30px; text-align: center;
}
.post-download-cta h3 { font-family: var(--font-display); margin: 0 0 8px; color: #FFFDF8; }
.post-download-cta p { opacity: .9; margin: 0 0 16px; }
.post-download-cta .btn-cta { background: var(--sand); color: var(--moss-ink); border-color: var(--sand); }

.post-pager { display: flex; justify-content: space-between; gap: 16px; margin-bottom: 40px; font-size: 14px; }
.post-pager a {
    display: block; background: var(--card); border: 1px solid var(--line);
    border-radius: var(--radius); padding: 12px 18px; box-shadow: var(--shadow-soft);
}
.post-pager a:hover { background: var(--sand-soft); }
.post-pager-next { text-align: right; }
.post-pager-prev, .post-pager-next { min-width: 0; flex: 1; }

/* ===== Phân trang ===== */
.pagination-wrap .nav-links { display: flex; justify-content: center; gap: 8px; flex-wrap: wrap; }
.pagination-wrap .page-numbers {
    display: inline-block; min-width: 40px; padding: 8px 12px; text-align: center;
    background: var(--card); border: 1px solid var(--line); border-radius: 10px;
    font-weight: 600; color: var(--moss-deep);
}
.pagination-wrap .page-numbers.current { background: var(--moss); color: #FFFDF8; border-color: var(--moss-deep); }
.pagination-wrap .page-numbers:hover { background: var(--sand-soft); }

/* ===== Widget ===== */
.widget { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow-soft); }
.widget-title {
    font-family: var(--font-display); font-size: 15px; letter-spacing: .06em;
    text-transform: uppercase; color: var(--moss-deep); margin: 0 0 14px;
    padding-bottom: 10px; border-bottom: 1px dashed var(--line-strong);
}
.widget ul { list-style: none; margin: 0; padding: 0; }
.widget ul li { padding: 7px 0; border-bottom: 1px dotted var(--line); font-size: 14px; }
.widget ul li:last-child { border-bottom: 0; }

/* ===== Footer ===== */
.site-footer { background: var(--moss-ink); color: var(--sand-soft); margin-top: 20px; }
.footer-widgets {
    display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 30px;
    padding: 46px 0 30px;
}
.footer-widgets > * { min-width: 0; }
.footer-widget .widget { background: transparent; border: 0; box-shadow: none; padding: 0; }
.footer-widget .widget-title { color: var(--sand); border-color: rgba(216, 201, 163, .35); }
.footer-widget a { color: var(--sand-soft); }
.footer-widget a:hover { color: #fff; }
.footer-widget ul li { border-color: rgba(216, 201, 163, .18); }
.footer-bottom { border-top: 1px solid rgba(216, 201, 163, .2); padding: 24px 0 30px; text-align: center; }
.disclaimer-text { font-size: 13px; line-height: 1.7; color: rgba(237, 228, 204, .85); max-width: 820px; margin: 16px auto 0; }

/* ===== Hiệu ứng xuất hiện khi cuộn ===== */
.scroll-reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.scroll-reveal.is-visible { opacity: 1; transform: translateY(0); }
.no-js .scroll-reveal, .scroll-reveal.reduced { opacity: 1; transform: none; }

/* ============================================================
   Cấu trúc responsive (grid-template-areas chỉ tồn tại ở đây)
   ============================================================ */
@media (max-width: 1024px) {
    .layout-grid {
        grid-template-columns: minmax(0, 1fr);
        grid-template-areas: "side" "main";
        gap: 24px;
    }
    .side-stick { position: static; grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .side-stick > * { min-width: 0; }
    .side-nav-card { grid-column: 1 / -1; }
    .side-nav .nav-menu { display: flex; flex-wrap: wrap; gap: 6px; }
    .side-nav .nav-menu li a { padding: 8px 14px; }
    .masonry { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .masonry-poster { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 768px) {
    .site-header { position: static; }
    .header-inner { flex-wrap: wrap; }
    .nav-toggle { display: block; }
    .mobile-nav { display: none; width: 100%; order: 3; border-top: 1px solid var(--line); padding-top: 12px; }
    .mobile-nav.is-open { display: block; }
    .mobile-nav .nav-menu { display: flex; flex-wrap: wrap; gap: 6px; }
    .mobile-nav .nav-menu li a { display: block; padding: 8px 14px; border-radius: 10px; background: var(--sand-soft); font-weight: 600; }
    .hero-board-media img { aspect-ratio: 16 / 9; }
    .hero-board-caption { position: static; background: var(--moss-deep); padding: 22px; }
    .side-stick { grid-template-columns: minmax(0, 1fr); }
    .footer-widgets { grid-template-columns: minmax(0, 1fr); }
    .post-board { padding: 24px 20px; }
}

@media (max-width: 560px) {
    .masonry, .masonry-poster { grid-template-columns: minmax(0, 1fr); }
    .post-pager { flex-direction: column; }
}