/*
 * MLNU Blog Hub
 * File: /blog/blog.css
 * Stage: 1.2
 * Status: Working draft — pending approval
 *
 * Design:
 * - MLNU navy, white and gold branding
 * - Light article-reading area
 * - Three-column desktop grid
 * - Responsive tablet and mobile layouts
 * - Namespaced selectors to reduce CSS collisions
 */

/* ======================================================
   1. DESIGN TOKENS
   ====================================================== */

.mlnu-blog {
    --blog-navy: #0b1830;
    --blog-navy-light: #152744;
    --blog-gold: #d6b45c;
    --blog-gold-hover: #c5a347;

    --blog-page-bg: #f5f6f8;
    --blog-card-bg: #ffffff;
    --blog-text: #252b35;
    --blog-muted: #626b78;
    --blog-border: #e0e4e9;
    --blog-error: #9f2929;

    --blog-container-width: 1200px;
    --blog-content-padding: 24px;

    --blog-radius-sm: 6px;
    --blog-radius-md: 12px;

    --blog-shadow-card:
        0 4px 16px rgba(11, 24, 48, 0.07);

    margin: 0;
    min-height: 100vh;
    background: var(--blog-page-bg);
    color: var(--blog-text);

    font-family:
        Arial,
        Helvetica,
        sans-serif;

    font-size: 16px;
    line-height: 1.6;
}


/* ======================================================
   2. BASE AND ACCESSIBILITY
   ====================================================== */

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

.mlnu-blog img {
    display: block;
    max-width: 100%;
}

.mlnu-blog a {
    color: inherit;
}

.mlnu-blog a:focus-visible,
.mlnu-blog button:focus-visible {
    outline: 3px solid var(--blog-gold);
    outline-offset: 4px;
}

.mlnu-blog h1,
.mlnu-blog h2,
.mlnu-blog h3,
.mlnu-blog p {
    margin-top: 0;
}

.mlnu-blog h1,
.mlnu-blog h2,
.mlnu-blog h3 {
    line-height: 1.25;
}


/* ======================================================
   3. HEADER
   ====================================================== */

.mlnu-blog .blog-header {
    position: sticky;
    top: 0;
    z-index: 1000;

    width: 100%;
    background: var(--blog-navy);
    color: #ffffff;

    border-bottom: 3px solid var(--blog-gold);
}

.mlnu-blog .blog-header__inner {
    width: min(
        100% - 48px,
        var(--blog-container-width)
    );

    min-height: 88px;
    margin-inline: auto;

    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
}

.mlnu-blog .blog-brand {
    display: inline-flex;
    align-items: center;
    flex: 0 0 auto;

    text-decoration: none;
}

.mlnu-blog .blog-brand__logo {
    width: 76px;
    height: 76px;
    object-fit: contain;
}


/* ======================================================
   4. NAVIGATION
   ====================================================== */

.mlnu-blog .blog-navigation {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 8px 22px;
}

.mlnu-blog .blog-navigation a {
    display: inline-flex;
    align-items: center;

    min-height: 42px;
    padding: 8px 0;

    color: #ffffff;
    font-size: 0.94rem;
    font-weight: 600;

    text-decoration: none;
    transition: color 160ms ease;
}

.mlnu-blog .blog-navigation a:hover {
    color: var(--blog-gold);
}

.mlnu-blog .blog-navigation a[aria-current="page"] {
    color: var(--blog-gold);
}

.mlnu-blog .blog-navigation .blog-navigation__login {
    padding: 10px 15px;

    border: 1px solid var(--blog-gold);
    border-radius: var(--blog-radius-sm);

    color: var(--blog-gold);
}

.mlnu-blog .blog-navigation .blog-navigation__login:hover {
    background: var(--blog-gold);
    color: var(--blog-navy);
}


/* ======================================================
   5. MAIN CONTENT CONTAINER
   ====================================================== */

.mlnu-blog .blog-main {
    width: min(
        100% - 48px,
        var(--blog-container-width)
    );

    margin-inline: auto;
}


/* ======================================================
   6. INTRODUCTION / HERO
   ====================================================== */

.mlnu-blog .blog-intro {
    padding: 76px 24px 64px;
    text-align: center;
}

.mlnu-blog .blog-intro__eyebrow,
.mlnu-blog .blog-section__eyebrow {
    margin-bottom: 12px;

    color: #8a6b19;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.13em;
    line-height: 1.4;
}

.mlnu-blog .blog-intro h1 {
    max-width: 850px;
    margin: 0 auto 20px;

    color: var(--blog-navy);
    font-size: clamp(2.2rem, 4.2vw, 3.6rem);
    font-weight: 750;
    letter-spacing: -0.035em;
}

.mlnu-blog .blog-intro__description {
    max-width: 740px;
    margin: 0 auto;

    color: var(--blog-muted);
    font-size: clamp(1rem, 1.5vw, 1.15rem);
    line-height: 1.8;
}


/* ======================================================
   7. ARTICLE SECTION
   ====================================================== */

.mlnu-blog .blog-articles {
    padding: 0 0 80px;
}

.mlnu-blog .blog-articles__heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;

    margin-bottom: 28px;
    padding-bottom: 18px;

    border-bottom: 1px solid var(--blog-border);
}

.mlnu-blog .blog-articles__heading h2 {
    margin-bottom: 0;

    color: var(--blog-navy);
    font-size: clamp(1.7rem, 2.6vw, 2.2rem);
    letter-spacing: -0.025em;
}

.mlnu-blog .blog-category-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 0 0 28px;
}

.mlnu-blog .blog-category-filter__button {
    min-height: 44px;
    padding: 9px 16px;
    background: #ffffff;
    border: 1px solid var(--blog-navy);
    border-radius: var(--blog-radius-full, 9999px);
    color: var(--blog-navy);
    cursor: pointer;
    font: inherit;
    font-size: 0.9rem;
    font-weight: 700;
    line-height: 1.35;
    text-align: center;
}

.mlnu-blog .blog-category-filter__button:hover,
.mlnu-blog .blog-category-filter__button[aria-pressed="true"] {
    background: var(--blog-navy);
    color: #ffffff;
    box-shadow: inset 0 -3px 0 var(--blog-gold);
}


/* ======================================================
   8. ARTICLE GRID
   ====================================================== */

.mlnu-blog .blog-articles__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
    align-items: stretch;
}


/* ======================================================
   9. ARTICLE CARD
   ====================================================== */

/*
 * These styles are prepared for the article-card markup
 * that blog.js will generate in Stage 1.3.
 */

.mlnu-blog .blog-card {
    min-width: 0;
    overflow: hidden;

    display: flex;
    flex-direction: column;

    background: var(--blog-card-bg);
    border: 1px solid var(--blog-border);
    border-radius: var(--blog-radius-md);

    box-shadow: var(--blog-shadow-card);

    transition:
        transform 180ms ease,
        box-shadow 180ms ease;
}

.mlnu-blog .blog-card:hover {
    transform: translateY(-4px);

    box-shadow:
        0 10px 26px rgba(11, 24, 48, 0.12);
}

.mlnu-blog .blog-card__image-link {
    display: block;
    overflow: hidden;

    background: #e8ebef;
    aspect-ratio: 16 / 9;
}

.mlnu-blog .blog-card__image {
    width: 100%;
    height: 100%;

    object-fit: cover;
    object-position: center;

    transition: transform 220ms ease;
}

.mlnu-blog .blog-card:hover .blog-card__image {
    transform: scale(1.025);
}

.mlnu-blog .blog-card__content {
    display: flex;
    flex: 1;
    flex-direction: column;
    align-items: flex-start;

    padding: 24px;
}

.mlnu-blog .blog-card__meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 12px;

    margin-bottom: 14px;

    color: var(--blog-muted);
    font-size: 0.78rem;
}

.mlnu-blog .blog-card__category {
    display: inline-block;

    padding: 4px 9px;

    background: #f7f0dd;
    border-radius: 4px;

    color: #705515;
    font-size: 0.74rem;
    font-weight: 700;
}

.mlnu-blog .blog-card__date {
    line-height: 1.5;
}

.mlnu-blog .blog-card__title {
    margin-bottom: 13px;

    color: var(--blog-navy);
    font-size: 1.3rem;
    font-weight: 700;
    line-height: 1.35;
}

.mlnu-blog .blog-card__title a {
    color: inherit;
    text-decoration: none;
}

.mlnu-blog .blog-card__title a:hover {
    color: #8a6b19;
}

.mlnu-blog .blog-card__excerpt {
    margin-bottom: 24px;

    color: var(--blog-muted);
    font-size: 0.95rem;
    line-height: 1.75;
}

.mlnu-blog .blog-card__read-more {
    display: inline-flex;
    align-items: center;
    gap: 8px;

    margin-top: auto;
    padding: 10px 15px;

    background: var(--blog-navy);
    border: 1px solid var(--blog-navy);
    border-radius: var(--blog-radius-sm);

    color: #ffffff;
    font-size: 0.9rem;
    font-weight: 700;
    text-decoration: none;

    transition:
        background 160ms ease,
        border-color 160ms ease,
        color 160ms ease;
}

.mlnu-blog .blog-card__read-more:hover {
    background: var(--blog-gold);
    border-color: var(--blog-gold);
    color: var(--blog-navy);
}

.mlnu-blog .blog-card__read-more::after {
    content: "\2192";
    font-size: 1.1em;
    line-height: 1;
}


/* ======================================================
   10. LOADING, EMPTY AND ERROR STATES
   ====================================================== */

.mlnu-blog .blog-status {
    color: var(--blog-muted);
    text-align: center;
}

.mlnu-blog .blog-status--loading {
    grid-column: 1 / -1;

    margin: 0;
    padding: 50px 24px;

    background: var(--blog-card-bg);
    border: 1px solid var(--blog-border);
    border-radius: var(--blog-radius-md);
}

.mlnu-blog .blog-status--empty {
    grid-column: 1 / -1;

    margin: 0;
    padding: 48px 24px;

    background: var(--blog-card-bg);
    border: 1px solid var(--blog-border);
    border-radius: var(--blog-radius-md);
}

.mlnu-blog .blog-status--error {
    margin: 24px 0;
    padding: 24px;

    background: #fff3f3;
    border: 1px solid #e6baba;
    border-left: 4px solid var(--blog-error);
    border-radius: var(--blog-radius-sm);

    color: #5f2020;
}

.mlnu-blog .blog-status--error h3 {
    margin-bottom: 8px;
    color: var(--blog-error);
}

.mlnu-blog .blog-status--error p {
    margin-bottom: 0;
}

.mlnu-blog [hidden] {
    display: none !important;
}


/* ======================================================
   ARTICLE READING PAGE
   ====================================================== */

.mlnu-blog .blog-article-main {
    padding-block: 48px 80px;
}

.mlnu-blog .blog-article {
    max-width: 900px;
    margin-inline: auto;
    overflow: hidden;
    background: var(--blog-card-bg);
    border: 1px solid var(--blog-border);
    border-radius: var(--blog-radius-md);
    box-shadow: var(--blog-shadow-card);
}

.mlnu-blog .blog-article__header {
    padding: 44px 64px 30px;
}

.mlnu-blog .blog-article__back,
.mlnu-blog .blog-article__home {
    color: #705515;
    font-weight: 700;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

.mlnu-blog .blog-article__cta {
    display: inline-block;
    margin-top: 12px;
    padding: 12px 20px;
    border-radius: var(--blog-radius-sm);
    background: var(--blog-navy);
    color: #ffffff;
    font-weight: 700;
    text-decoration: none;
}

.mlnu-blog .blog-article__cta:hover {
    background: var(--blog-navy-light);
}

.mlnu-blog .blog-article__category {
    margin: 28px 0 10px;
    color: #705515;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.mlnu-blog .blog-article__title {
    margin-bottom: 14px;
    color: var(--blog-navy);
    font-size: clamp(2rem, 4.5vw, 3.25rem);
    letter-spacing: -0.03em;
    overflow-wrap: anywhere;
}

.mlnu-blog .blog-article__byline {
    margin-bottom: 0;
    color: var(--blog-muted);
}

.mlnu-blog .blog-article__featured {
    margin: 0;
    background: #e8ebef;
}

.mlnu-blog .blog-article__image {
    width: 100%;
    max-height: 520px;
    aspect-ratio: 16 / 9;
    object-fit: cover;
}

.mlnu-blog .blog-article__image-placeholder {
    display: grid;
    min-height: 240px;
    aspect-ratio: 16 / 9;
    place-items: center;
    padding: 24px;
    background: var(--blog-navy);
    border-bottom: 3px solid var(--blog-gold);
    color: #ffffff;
    font-weight: 700;
    text-align: center;
}

.mlnu-blog .blog-article__content {
    max-width: 760px;
    margin-inline: auto;
    padding: 42px 36px 24px;
    color: var(--blog-text);
    font-size: 1.08rem;
    line-height: 1.85;
    overflow-wrap: anywhere;
}

.mlnu-blog .blog-article__content h2,
.mlnu-blog .blog-article__content h3 {
    margin: 1.8em 0 0.55em;
    color: var(--blog-navy);
}

.mlnu-blog .blog-article__content p,
.mlnu-blog .blog-article__content ul,
.mlnu-blog .blog-article__content ol,
.mlnu-blog .blog-article__content blockquote {
    margin-bottom: 1.25em;
}

.mlnu-blog .blog-article__content a {
    color: #705515;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

.mlnu-blog .blog-article__content blockquote {
    padding: 4px 0 4px 20px;
    border-left: 4px solid var(--blog-gold);
    color: var(--blog-muted);
}

.mlnu-blog .blog-article__footer {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 16px;
    margin: 0 64px;
    padding: 24px 0 36px;
    border-top: 1px solid var(--blog-border);
}

@media (max-width: 640px) {
    .mlnu-blog .blog-article-main {
        padding-block: 28px 48px;
    }

    .mlnu-blog .blog-article__header {
        padding: 28px 22px 24px;
    }

    .mlnu-blog .blog-article__category {
        margin-top: 22px;
    }

    .mlnu-blog .blog-article__content {
        padding: 28px 22px 12px;
        font-size: 1rem;
        line-height: 1.75;
    }

    .mlnu-blog .blog-article__footer {
        flex-direction: column;
        margin-inline: 22px;
        padding-bottom: 28px;
    }
}


/* ======================================================
   11. FOOTER
   ====================================================== */

.mlnu-blog .blog-footer {
    padding: 36px 24px 28px;

    background: var(--blog-navy);
    border-top: 3px solid var(--blog-gold);

    color: #ffffff;
    text-align: center;
}

.mlnu-blog .blog-footer__inner {
    width: min(100%, 800px);
    margin-inline: auto;
}

.mlnu-blog .blog-footer__brand {
    margin-bottom: 8px;

    color: var(--blog-gold);
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.mlnu-blog .blog-footer__inner > p:not(.blog-footer__brand) {
    color: #e0e5ec;
    font-size: 0.92rem;
}

.mlnu-blog .blog-footer .blog-footer__copyright {
    margin: 22px 0 0;
    padding-top: 18px;

    border-top: 1px solid rgba(255, 255, 255, 0.18);

    color: #c4ccd8;
    font-size: 0.82rem;
}


/* ======================================================
   12. TABLET
   ====================================================== */

@media (max-width: 1024px) {
    .mlnu-blog .blog-header__inner {
        width: min(100% - 36px, var(--blog-container-width));
        gap: 20px;
    }

    .mlnu-blog .blog-navigation {
        gap: 6px 14px;
    }

    .mlnu-blog .blog-navigation a {
        font-size: 0.88rem;
    }

    .mlnu-blog .blog-main {
        width: min(100% - 36px, var(--blog-container-width));
    }

    .mlnu-blog .blog-articles__grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 22px;
    }

    .mlnu-blog .blog-intro {
        padding: 64px 20px 54px;
    }
}


/* ======================================================
   13. MOBILE
   ====================================================== */

@media (max-width: 640px) {
    .mlnu-blog {
        --blog-content-padding: 18px;
    }

    .mlnu-blog .blog-header__inner {
        width: calc(100% - 32px);

        min-height: auto;
        padding: 12px 0 16px;

        flex-direction: column;
        align-items: center;
        gap: 10px;
    }

    .mlnu-blog .blog-brand__logo {
        width: 66px;
        height: 66px;
    }

    .mlnu-blog .blog-navigation {
        width: 100%;

        display: flex;
        justify-content: center;
        flex-wrap: wrap;
        gap: 4px 16px;
    }

    .mlnu-blog .blog-navigation a {
        min-height: 36px;
        padding: 5px 0;
        font-size: 0.84rem;
    }

    .mlnu-blog .blog-navigation .blog-navigation__login {
        padding: 7px 10px;
    }

    .mlnu-blog .blog-main {
        width: calc(100% - 32px);
    }

    .mlnu-blog .blog-intro {
        padding: 48px 4px 42px;
    }

    .mlnu-blog .blog-intro h1 {
        font-size: clamp(2rem, 8vw, 2.7rem);
    }

    .mlnu-blog .blog-intro__description {
        font-size: 1rem;
        line-height: 1.7;
    }

    .mlnu-blog .blog-articles {
        padding-bottom: 54px;
    }

    .mlnu-blog .blog-articles__heading {
        margin-bottom: 22px;
        padding-bottom: 15px;
    }

    .mlnu-blog .blog-category-filter {
        gap: 8px;
        margin-bottom: 22px;
    }

    .mlnu-blog .blog-category-filter__button {
        flex: 1 1 auto;
        padding-inline: 12px;
        font-size: 0.84rem;
    }

    .mlnu-blog .blog-articles__grid {
        grid-template-columns: minmax(0, 1fr);
        gap: 20px;
    }

    .mlnu-blog .blog-card__content {
        padding: 20px;
    }

    .mlnu-blog .blog-card__title {
        font-size: 1.2rem;
    }

    .mlnu-blog .blog-footer {
        padding: 30px 18px 24px;
    }
}


/* ======================================================
   14. REDUCED MOTION
   ====================================================== */

@media (prefers-reduced-motion: reduce) {
    .mlnu-blog *,
    .mlnu-blog *::before,
    .mlnu-blog *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}