:root {
    --blog-bg: #f3f7fc;
    --blog-surface: #ffffff;
    --blog-border: #d9e3f2;
    --blog-shadow: 0 8px 20px rgba(15, 38, 77, 0.08);
    --blog-text: #1a1a1b;
    --blog-muted: #5b6472;
    --blog-primary: #1f5ea8;
    --blog-primary-strong: #174a84;
    --blog-danger: #d92d20;
    --blog-danger-strong: #b42318;
}

* {
    box-sizing: border-box;
}

html {
    background: linear-gradient(135deg, #d8dde5 0%, #e3e7ed 55%, #edf1f6 100%);
}

body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--blog-text);
    background: linear-gradient(135deg, #d8dde5 0%, #e3e7ed 55%, #edf1f6 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header gris anthracite -> gris clair */
.header {
    background: linear-gradient(180deg, #2c3136 0%, #4a5057 46%, #d6d9df 100%);
    color: #ffffff;
    padding: 2rem;
    height: 220px;
    box-sizing: border-box;
    text-align: center;
    position: relative;
    border-radius: 0 0 24px 24px;
    border-bottom: 1px solid #cfd4db;
    box-shadow: 0 8px 22px rgba(17, 24, 39, 0.14);
}

.header-nav {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 1rem;
    max-width: 1200px;
    margin: 0 auto;
}

.header-left-links {
    display: inline-flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0.55rem;
    width: max-content;
    margin-left: calc(150px - (50vw - 50%));
}

.header-left-top,
.header-left-bottom {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.header-left-bottom {
    width: 100%;
}

.header-left-bottom .home-btn {
    flex: 1 1 0;
}

.nav-links {
    display: flex;
    gap: 0.8rem;
}

.header-main {
    max-width: 1200px;
    margin: 0 auto;
}

.header-title-stack {
    position: absolute;
    top: 50%;
    right: 200px;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.35rem;
    text-align: center;
}

.header-title-stack .nav-links {
    justify-content: center;
    margin-bottom: 0.35rem;
}

.home-btn,
.nav-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #111827;
    text-decoration: none;
    height: 38px;
    min-height: 38px;
    padding: 0 1.2rem;
    border-radius: 999px;
    border: 1px solid #d4deed;
    background: #ffffff;
    font-size: 1rem;
    line-height: 1.1;
    font-weight: 500;
    box-sizing: border-box;
    transition: 0.2s ease;
}

.home-btn:hover,
.nav-link:hover {
    background: #4a5155;
    border-color: #3f4549;
    color: #ffffff;
    transform: translateY(-1px);
}

.header-title-stack .nav-link {
    font-weight: 600;
}

.header-left-links .home-btn {
    font-weight: 500;
}

.header-nav .header-left-links > .a11y-toggle-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #111827;
    background: #ffffff;
    border: 1px solid #d4deed;
    border-radius: 999px;
    width: 100%;
    height: 38px;
    min-height: 38px;
    padding: 0 1.2rem;
    font-size: 1rem;
    line-height: 1.1;
    font-weight: 700;
    box-sizing: border-box;
    transition: 0.2s ease;
}

.header-nav .header-left-links > .a11y-toggle-btn:hover,
.header-nav .header-left-links > .a11y-toggle-btn:focus-visible {
    background: #4a5155;
    border-color: #3f4549;
    color: #ffffff;
    transform: translateY(-1px);
    outline: none;
}

.header h1 {
    margin: 0 0 0.35rem;
    text-align: center;
    font-size: clamp(1.9rem, 4vw, 2.7rem);
    line-height: 1.15;
}

.header .subtitle {
    margin: 0;
    text-align: center;
    font-size: 1rem;
    opacity: 0.96;
}

.container {
    max-width: 1680px;
    width: min(98vw, 1680px);
    margin: 2rem auto;
    padding: 0 8rem;
    display: grid;
    grid-template-columns: 420px minmax(0, 1fr);
    gap: 2rem;
    align-items: start;
}

.create-post {
    background: #fcfdff;
    border: 2px solid #3f4549;
    border-radius: 14px;
    box-shadow: 0 10px 24px rgba(24, 30, 38, 0.16);
    padding: 1rem;
}

.blog-feed-column {
    display: grid;
    gap: 1rem;
    min-width: 0;
}

.blog-posts-panel {
    background: #fcfdff;
    border: 2px solid #3f4549;
    border-radius: 14px;
    box-shadow: 0 10px 24px rgba(24, 30, 38, 0.16);
    padding: 0.95rem;
    min-width: 0;
}

.create-post h2 {
    margin: 0 0 0.8rem;
    color: #2f353a;
    font-size: 1.25rem;
}

.search-posts {
    margin: 0 0 0.8rem;
    padding: 0;
}

.blog-feed-title {
    margin: 0 0 0.75rem;
    color: #2f353a;
    font-size: 1.2rem;
}

.search-posts-controls {
    display: grid;
    grid-template-columns: minmax(180px, 220px) 1fr auto;
    gap: 0.6rem;
    align-items: end;
}

.search-field {
    display: grid;
    gap: 0.32rem;
}

.search-field label {
    font-size: 0.88rem;
    font-weight: 700;
    color: #2f353a;
}

.search-field select,
.search-field input {
    width: 100%;
    border: 1px solid #c8d6ea;
    border-radius: 10px;
    padding: 0.62rem 0.75rem;
    font: inherit;
    background: #ffffff;
}

.search-field select:focus,
.search-field input:focus {
    outline: 2px solid rgba(31, 94, 168, 0.2);
    border-color: var(--blog-primary);
}

.search-reset-btn {
    border: 1px solid #bfcbdc;
    border-radius: 10px;
    padding: 0.62rem 0.9rem;
    background: #f6f9ff;
    color: #2f353a;
    font-weight: 700;
    cursor: pointer;
}

.search-reset-btn:hover {
    background: #e9f0fb;
    border-color: #a8b8ce;
}

#postForm {
    display: grid;
    gap: 0.65rem;
}

#postForm input,
#postForm textarea,
#postForm select,
.add-comment input {
    width: 100%;
    border: 1px solid #c8d6ea;
    border-radius: 10px;
    padding: 0.62rem 0.75rem;
    font: inherit;
    background: #ffffff;
}

#postForm textarea {
    min-height: 120px;
    resize: vertical;
}

#postForm input:focus,
#postForm textarea:focus,
#postForm select:focus,
.add-comment input:focus {
    outline: 2px solid rgba(31, 94, 168, 0.2);
    border-color: var(--blog-primary);
}

.event-date-group {
    display: grid;
    gap: 0.35rem;
}

.event-date-group label {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--blog-primary);
}

#postForm button[type='submit'] {
    justify-self: start;
    border: 0;
    border-radius: 10px;
    padding: 0.62rem 0.95rem;
    background: var(--blog-primary);
    color: #ffffff;
    font-weight: 700;
    cursor: pointer;
}

#postForm button[type='submit']:hover {
    background: var(--blog-primary-strong);
}

.posts-container {
    display: grid;
    gap: 0.9rem;
}

.posts-empty {
    margin: 0;
    padding: 1rem;
    border: 1px dashed #c4d4ea;
    border-radius: 12px;
    background: #f8fbff;
    color: #4f5e73;
    font-weight: 600;
}

.post {
    background: var(--blog-surface);
    border: 3px solid var(--blog-border);
    border-radius: 14px;
    box-shadow: var(--blog-shadow);
    padding: 0.95rem;
}

.post.post-cat-announcements {
    background: #ffffff;
    border-color: #9fc7ee;
}

.post.post-cat-activities {
    background: #ffffff;
    border-color: #9fd2ac;
}

.post.post-cat-education {
    background: #ffffff;
    border-color: #dfadc6;
}

.post.post-cat-general {
    background: #ffffff;
    border-color: #ddc77f;
}

.post.post-cat-resources {
    background: #ffffff;
    border-color: #b8c0cc;
}

.post-highlight {
    border-color: #7ba7e1;
    box-shadow: 0 0 0 3px rgba(31, 94, 168, 0.15);
}

.post-header {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 0.55rem 0.7rem;
    align-items: start;
}

.post-title-wrap {
    min-width: 0;
}

.post-header h3 {
    margin: 0;
    font-size: 1.15rem;
    line-height: 1.25;
    color: #0f2c52;
}

.post-meta-row {
    margin-top: 0.35rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem 0.55rem;
    align-items: center;
}

.post-category {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    background: #e8f2ff;
    color: #0f4f96;
    border: 1px solid #c9ddfb;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: capitalize;
    letter-spacing: 0.01em;
}

.post-date {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    border: 1px solid #dce6f5;
    background: #f8fbff;
    color: #4f5e73;
    font-size: 0.75rem;
    font-weight: 700;
}

.delete-btn {
    align-self: start;
    background: #ffe2e0;
    color: var(--blog-danger-strong);
    border: 1px solid #ffb3ae;
    padding: 0.33rem 0.62rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.78rem;
    font-weight: 700;
    margin: 0;
}

.delete-btn:hover {
    background: #ffd0cb;
    color: var(--blog-danger);
}

.post-content {
    margin: 0.75rem 0 0;
    line-height: 1.58;
    white-space: pre-wrap;
    color: #1f2937;
}

.post-event-date {
    margin: 0.62rem 0 0;
    font-size: 0.86rem;
    font-weight: 700;
    color: #14559f;
}

.post-author {
    display: block;
    margin-top: 0.75rem;
    padding-top: 0.55rem;
    border-top: 1px dashed #dbe4f3;
    font-size: 0.82rem;
    color: var(--blog-muted);
}

.post-actions {
    margin-top: 0.6rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
}

.post-action-btn {
    border: 1px solid #bfd2eb;
    border-radius: 8px;
    background: #f7fbff;
    color: #1d3d65;
    font-size: 0.8rem;
    font-weight: 700;
    padding: 0.34rem 0.62rem;
    cursor: pointer;
}

.post-action-btn:hover {
    background: #e9f2ff;
}

.post-favorite-btn.is-active {
    border-color: #caa95f;
    background: #fff7e1;
    color: #7c5b14;
}

.profile-link {
    color: #114e96;
    text-decoration: none;
    font-weight: 700;
}

.profile-link:hover {
    text-decoration: underline;
}

.comments-section {
    margin-top: 0.75rem;
    padding-top: 0.55rem;
    border-top: 1px solid #ecf1f8;
}

.comment-list {
    display: grid;
    gap: 0.45rem;
    margin-bottom: 0.6rem;
}

.comment-item {
    margin: 0;
    padding: 0.55rem 0.65rem;
    border-radius: 10px;
    border: 1px solid #dbe5f4;
    background: #f8fbff;
    line-height: 1.45;
    color: #24364d;
}

.comment-item strong {
    color: #164b8b;
}

.delete-comment-btn {
    margin-left: 0.6rem;
    border: 1px solid #ffb3ae;
    background: #ffe2e0;
    color: var(--blog-danger-strong);
    border-radius: 7px;
    padding: 0.18rem 0.45rem;
    font-size: 0.72rem;
    font-weight: 700;
    cursor: pointer;
}

.delete-comment-btn:hover {
    background: #ffd0cb;
}

.add-comment input {
    font-size: 0.92rem;
}

.footer {
    background: #2f353a;
    color: #ffffff;
    text-align: center;
    padding: 0.7rem 1rem;
    margin-top: auto;
    border-top: 1px solid #24292e;
}

.footer p {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 600;
}

@media (max-width: 768px) {
    .header {
        height: auto;
        min-height: 220px;
    }

    .header-nav {
        flex-direction: column;
        gap: 0.6rem;
    }

    .header-left-links {
        margin-left: 0;
        width: 100%;
        align-items: center;
        justify-content: center;
    }

    .header-left-top,
    .header-left-bottom {
        justify-content: center;
        flex-wrap: wrap;
    }

    .header-nav .header-left-links > .a11y-toggle-btn {
        width: auto;
    }

    .header-title-stack {
        position: static;
        transform: none;
        gap: 0.3rem;
    }

    .header-title-stack .nav-links {
        justify-content: center;
        flex-wrap: wrap;
        margin-bottom: 0.15rem;
    }

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

    .post-header {
        grid-template-columns: 1fr;
    }

    .delete-btn {
        justify-self: start;
    }

    .search-posts-controls {
        grid-template-columns: 1fr;
        align-items: stretch;
    }

    .search-reset-btn {
        justify-self: start;
    }
}

@media (max-width: 580px) {
    .container {
        padding: 0 0.7rem;
    }

    .create-post,
    .blog-posts-panel,
    .post {
        padding: 0.85rem;
    }

    .header h1 {
        font-size: 1.8rem;
    }

    .header .subtitle {
        font-size: 0.92rem;
    }
}