/* ==========================================
   FORUM.CSS - DIỄN ĐÀN VĂN HỌC VIỆT NAM
   ========================================== */

   :root {
    --vn-red:    #D32F2F;
    --vn-gold:   #D4AF37;
    --vn-brown:  #6D4C41;
    --vn-cream:  #FFF8E1;
    --vn-dark:   #3E2723;
    --g-hero:    linear-gradient(135deg, #8B4513 0%, #D2691E 100%);
}
body {
    background:
        linear-gradient(to bottom, #f8f5ef, #f3eee6);
}
/* ===== HERO ===== */
.forum-hero {
    background:
        linear-gradient(rgba(0,0,0,.08), rgba(0,0,0,.08)),
        linear-gradient(135deg, #8B4513 0%, #C56A1A 100%);
    padding: 2.2rem 0 2.2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    border-bottom: 4px solid rgba(212,175,55,.35);
}
.forum-hero::before {
    content: '';
    position: absolute; inset: 0;
    background: repeating-linear-gradient(90deg,
        rgba(255,255,255,.03) 0, transparent 1px, transparent 40px,
        rgba(255,255,255,.03) 41px),
        repeating-linear-gradient(0deg,
        rgba(255,255,255,.03) 0, transparent 1px, transparent 40px,
        rgba(255,255,255,.03) 41px);
}
.forum-hero h1 {
    font-family: 'Playfair Display', serif;
    font-size: 3.2rem;
    font-weight: 700;
    letter-spacing: .5px;
    color: #fff;
    position: relative;
    text-shadow:
        0 2px 4px rgba(0,0,0,.25),
        0 8px 20px rgba(0,0,0,.18);
    margin-bottom: .8rem;
}
.forum-hero p {
    color: rgba(255,255,255,.92);
    font-size: 1.08rem;
    font-family: 'Merriweather', serif;
    line-height: 1.7;
}

/* ===== LAYOUT ===== */
.forum-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 2rem;
    padding: 2rem 0 4rem;
    align-items: start;
}

@media (max-width: 900px) {
    .forum-layout { grid-template-columns: 1fr; }
    .forum-sidebar { order: -1; }
}

/* ===== CREATE POST BOX ===== */
.create-post-box {
    background: rgba(255,255,255,.95);
    border-radius: 22px;
    padding: 1.6rem;
    margin-bottom: 1.8rem;

    border: 1px solid rgba(212,175,55,.25);

    box-shadow:
        0 8px 24px rgba(139,69,19,.08);

    position: relative;
}
.create-post-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}
.avatar-circle {
    width: 46px; height: 46px;
    border-radius: 50%;
    background: var(--g-hero);
    color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.1rem; font-weight: 700;
    flex-shrink: 0;
    border: 2px solid var(--vn-gold);
}
.create-post-trigger {
    flex: 1;
    background: #faf7f2;
    border: 1.5px solid #e7dccd;
    border-radius: 25px;
    padding: .8rem 1.5rem;
    text-align: left;
    color: #999;
    cursor: pointer;
    font-size: .95rem;
    transition: all .25s;
}
 
.create-post-trigger:hover {
    border-color: #c89b3c;
    background: #fffdf8;
    color: var(--vn-brown);
}
.create-post-shortcuts {
    display: flex;
    gap: .8rem;
    flex-wrap: wrap;
    border-top: 1px solid #f0f0f0;
    padding-top: 1rem;
}
.create-post-shortcuts button {
    flex: 1; min-width: 130px;
    padding: .6rem 1rem;
    border: 2px solid rgba(212,175,55,.4);
    border-radius: 8px;
    background: transparent;
    cursor: pointer;
    font-size: .9rem;
    color: var(--vn-brown);
    transition: all .25s;
}
.create-post-shortcuts button:hover {
    background: var(--vn-cream);
    border-color: var(--vn-gold);
}

/* Login prompt */
.login-prompt {
    display: flex; align-items: center; justify-content: space-between;
    background: var(--vn-cream);
    border: 2px dashed var(--vn-gold);
    border-radius: 12px;
    padding: 1.2rem 1.5rem;
    margin-bottom: 1.5rem;
    font-size: 1rem; color: var(--vn-brown);
}
.btn-login-prompt {
    background: var(--g-hero);
    color: #fff; padding: .5rem 1.2rem;
    border-radius: 8px; text-decoration: none;
    font-weight: 600; font-size: .9rem;
}

/* ===== FEED TABS ===== */
.feed-tabs {
    display: flex; gap: .5rem;
    margin-bottom: 1.5rem;
}
.feed-tab {
    padding: .72rem 1.5rem;
    border-radius: 999px;
    border: 1px solid #e5d7c7;
    background: rgba(255,255,255,.88);
    backdrop-filter: blur(4px);
    font-weight: 600;
}
.feed-tab.active,
.feed-tab:hover {
    background: linear-gradient(135deg, #a85714, #d07b26);
    color: #fff;
    border-color: transparent;
}
/* ===== POST CARD ===== */
.post-card {
    background: #fff;
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 16px rgba(139,69,19,.08);
    border: 1px solid rgba(212,175,55,.2);
    transition: box-shadow .3s, transform .3s;
    animation: fadeUp .4s ease;
}
.post-card:hover {
    transform: translateY(-4px);
    box-shadow:
        0 12px 28px rgba(90,60,20,.12),
        0 4px 10px rgba(0,0,0,.06);
}
@keyframes fadeUp {
    from { opacity:0; transform: translateY(16px); }
    to   { opacity:1; transform: translateY(0); }
}
.post-card:hover {
    box-shadow: 0 8px 24px rgba(139,69,19,.15);
    transform: translateY(-2px);
}

/* Post header */
.post-header {
    display: flex; align-items: center;
    gap: .8rem; margin-bottom: 1rem;
}
.post-avatar {
    width: 44px; height: 44px; border-radius: 50%;
    background: var(--g-hero); color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 1rem; flex-shrink: 0;
    border: 2px solid var(--vn-gold);
    overflow: hidden;
}
.post-avatar img { width:100%; height:100%; object-fit:cover; }
.post-meta { flex: 1; }
.post-author {
    font-weight: 700; color: var(--vn-dark);
    font-size: 1rem; font-family: 'Playfair Display', serif;
}
.post-time { font-size: .82rem; color: #999; margin-top: 2px; }
.post-tag-badge {
    display: inline-block;
    padding: .25rem .7rem;
    border-radius: 12px;
    font-size: .8rem; font-weight: 600;
    background: var(--vn-cream);
    color: var(--vn-brown);
    border: 1px solid var(--vn-gold);
    cursor: pointer;
    transition: background .2s;
}
.post-tag-badge:hover { background: var(--vn-gold); color: #fff; }

/* Post delete btn */
.post-delete-btn {
    background: none; border: none;
    color: #ccc; cursor: pointer; font-size: 1.2rem;
    padding: .3rem; border-radius: 6px; transition: color .2s;
}
.post-delete-btn:hover { color: var(--vn-red); }

/* Post content */
.post-title {
    font-family: 'Playfair Display', serif;
    font-size: 1.25rem; font-weight: 700;
    color: var(--vn-dark); margin-bottom: .6rem;
}
.post-content {
    font-family: 'Merriweather', serif;
    font-size: .97rem; line-height: 1.85;
    color: #444; white-space: pre-wrap;
    margin-bottom: 1rem;
}
.post-content.collapsed {
    display: -webkit-box;
    -webkit-line-clamp: 5;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.read-more-btn {
    background: none; border: none;
    color: var(--vn-brown); font-size: .9rem;
    cursor: pointer; font-weight: 600; padding: 0;
    margin-bottom: 1rem;
}
.read-more-btn:hover { color: var(--vn-red); }

/* ===== REACTIONS BAR ===== */
.reactions-bar {
    display: flex; align-items: center;
    gap: .5rem; flex-wrap: wrap;
    padding: .8rem 0;
    border-top: 1px solid #f0f0f0;
    border-bottom: 1px solid #f0f0f0;
    margin-bottom: 1rem;
}
.reaction-summary {
    display: flex; align-items: center;
    gap: .3rem; font-size: .88rem; color: #666;
    flex: 1;
}
.emoji-reactions {
    display: flex; gap: .4rem;
}
.emoji-btn {
    padding: .4rem .8rem;
    border: 2px solid transparent;
    border-radius: 20px;
    background: #f5f5f5;
    cursor: pointer; font-size: .95rem;
    transition: all .2s; display: flex;
    align-items: center; gap: .3rem;
}
.emoji-btn:hover {
    background: var(--vn-cream);
    border-color: var(--vn-gold);
    transform: scale(1.1);
}
.emoji-btn.active {
    background: var(--vn-cream);
    border-color: var(--vn-gold);
    font-weight: 700;
}
.emoji-btn .count {
    font-size: .8rem; color: #666;
}

/* Comment toggle */
.comment-toggle-btn {
    background: none; border: none;
    color: var(--vn-brown); font-size: .9rem;
    cursor: pointer; font-weight: 600;
    padding: .3rem .6rem; border-radius: 8px;
    transition: background .2s;
}
.comment-toggle-btn:hover { background: var(--vn-cream); }

/* ===== COMMENTS SECTION ===== */
.comments-section {
    display: none;
    border-top: 1px solid #f5f5f5;
    padding-top: 1rem;
    animation: fadeIn .3s ease;
}
.comments-section.open { display: block; }

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.comment-item {
    display: flex; gap: .8rem;
    margin-bottom: 1rem;
    animation: fadeUp .3s ease;
}
.comment-avatar {
    width: 36px; height: 36px; border-radius: 50%;
    background: var(--g-hero); color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: .85rem; flex-shrink: 0;
    border: 2px solid var(--vn-gold); overflow: hidden;
}
.comment-avatar img { width:100%; height:100%; object-fit:cover; }
.comment-bubble {
    flex: 1;
    background: #f8f8f8;
    border-radius: 12px;
    padding: .8rem 1rem;
    border: 1px solid #eee;
    position: relative;
}
.comment-author {
    font-weight: 700; font-size: .9rem;
    color: var(--vn-dark); margin-bottom: .3rem;
}
.comment-text {
    font-size: .92rem; line-height: 1.6; color: #444;
    white-space: pre-wrap;
}
.comment-time {
    font-size: .78rem; color: #bbb; margin-top: .4rem;
}
.comment-del-btn {
    position: absolute; top: .5rem; right: .7rem;
    background: none; border: none;
    color: #ddd; cursor: pointer; font-size: 1rem;
    transition: color .2s;
}
.comment-del-btn:hover { color: var(--vn-red); }

/* Comment input */
.comment-input-row {
    display: flex; gap: .7rem;
    align-items: flex-start;
    margin-top: .5rem;
}
.comment-input-row textarea {
    flex: 1;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    padding: .7rem 1rem;
    font-size: .92rem;
    resize: none;
    min-height: 44px;
    max-height: 120px;
    font-family: 'Merriweather', serif;
    transition: border-color .25s;
}
.comment-input-row textarea:focus {
    outline: none;
    border-color: var(--vn-gold);
}
.comment-submit-btn {
    padding: .7rem 1.2rem;
    background: var(--g-hero);
    color: #fff; border: none;
    border-radius: 10px;
    cursor: pointer; font-weight: 600;
    font-size: .9rem;
    transition: opacity .2s, transform .2s;
    white-space: nowrap;
}
.comment-submit-btn:hover { opacity: .9; transform: scale(1.04); }

/* ===== MODAL ===== */
.modal-overlay {
    position: fixed; inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 2000;
    display: flex; align-items: center; justify-content: center;
    padding: 1rem;
}
.modal-box {
    background: #fff;
    border-radius: 20px;
    width: 100%; max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0,0,0,.3);
    animation: modalIn .3s ease;
}
@keyframes modalIn {
    from { opacity:0; transform: scale(.92) translateY(-20px); }
    to   { opacity:1; transform: scale(1) translateY(0); }
}
.modal-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 1.5rem 1.5rem 1rem;
    border-bottom: 2px solid var(--vn-gold);
}
.modal-header h3 {
    font-family: 'Playfair Display', serif;
    font-size: 1.4rem; color: var(--vn-dark); margin: 0;
}
.modal-close {
    background: none; border: none; cursor: pointer;
    font-size: 1.4rem; color: #999;
    width: 36px; height: 36px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    transition: background .2s;
}
.modal-close:hover { background: #f0f0f0; color: var(--vn-red); }
.modal-body { padding: 1.5rem; }
.tag-selector { margin-bottom: 1rem; }
.tag-selector label {
    display: block; font-size: .9rem;
    color: var(--vn-brown); margin-bottom: .4rem; font-weight: 600;
}
.tag-row { display: flex; gap: .8rem; }
.tag-row select, .tag-row input {
    flex: 1; padding: .6rem 1rem;
    border: 2px solid #e0e0e0; border-radius: 8px;
    font-size: .9rem;
    transition: border-color .25s;
}
.tag-row select:focus, .tag-row input:focus {
    outline: none; border-color: var(--vn-gold);
}
.post-title-input {
    width: 100%;
    padding: .8rem 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 10px; font-size: 1rem;
    margin-bottom: .8rem;
    font-family: 'Playfair Display', serif;
    transition: border-color .25s;
    box-sizing: border-box;
}
.post-title-input:focus { outline: none; border-color: var(--vn-gold); }
.post-content-input {
    width: 100%;
    padding: .8rem 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 10px; font-size: .95rem;
    line-height: 1.7; resize: vertical;
    font-family: 'Merriweather', serif;
    transition: border-color .25s;
    box-sizing: border-box;
}
.post-content-input:focus { outline: none; border-color: var(--vn-gold); }
.char-count {
    text-align: right; font-size: .82rem;
    color: #aaa; margin-top: .3rem;
}
.modal-footer {
    display: flex; align-items: center; justify-content: flex-end;
    gap: .8rem; padding: 1rem 1.5rem 1.5rem;
    border-top: 1px solid #f0f0f0;
}
.modal-error { flex: 1; font-size: .88rem; color: var(--vn-red); }
.btn-cancel {
    padding: .7rem 1.4rem;
    border: 2px solid #e0e0e0;
    background: #fff; border-radius: 10px;
    cursor: pointer; font-size: .95rem; color: #666;
    transition: border-color .2s;
}
.btn-cancel:hover { border-color: #ccc; }
.btn-submit {
    padding: .7rem 1.8rem;
    background: var(--g-hero); color: #fff;
    border: none; border-radius: 10px;
    cursor: pointer; font-size: .95rem; font-weight: 700;
    transition: opacity .2s, transform .2s;
}
.btn-submit:hover { opacity: .9; transform: scale(1.04); }
.btn-submit:disabled { opacity: .6; cursor: not-allowed; transform: none; }

/* ===== SIDEBAR ===== */
.sidebar-card {
    background: rgba(255,255,255,.93);
    backdrop-filter: blur(6px);

    border-radius: 20px;
    padding: 1.5rem;

    border: 1px solid rgba(212,175,55,.2);

    box-shadow:
        0 8px 24px rgba(90,60,20,.06);
}
.sidebar-card h3 {
    font-family: 'Playfair Display', serif;
    font-size: 1.1rem; color: var(--vn-dark);
    margin-bottom: 1rem; padding-bottom: .6rem;
    border-bottom: 2px solid var(--vn-gold);
}
.stat-row {
    display: flex; align-items: center; justify-content: space-between;
    padding: .5rem 0;
    font-size: .95rem; color: #555;
    border-bottom: 1px solid #f5f5f5;
}
.stat-row strong { color: var(--vn-dark); font-size: 1.1rem; }
.hot-tags { display: flex; flex-wrap: wrap; gap: .5rem; }
.hot-tag {
    padding: .35rem .8rem;
    background: var(--vn-cream);
    border: 1px solid var(--vn-gold);
    border-radius: 15px; font-size: .85rem;
    color: var(--vn-brown); cursor: pointer;
    transition: all .2s;
}
.hot-tag:hover { background: var(--vn-gold); color: #fff; }
.guide-list {
    list-style: none; padding: 0; margin: 0;
}
.guide-list li {
    padding: .45rem 0;
    border-bottom: 1px solid #f5f5f5;
    font-size: .88rem; color: #555;
}

/* ===== LOADING & EMPTY ===== */
.feed-loading {
    display: flex; align-items: center; justify-content: center;
    gap: 1rem; padding: 4rem;
    color: var(--vn-brown); font-size: 1rem;
}
.spinner {
    width: 32px; height: 32px;
    border: 3px solid rgba(139,69,19,.2);
    border-top-color: var(--vn-brown);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.empty-feed {
    text-align: center; padding: 4rem 2rem;
    color: #aaa;
}
.empty-feed .empty-icon { font-size: 4rem; margin-bottom: 1rem; }
.empty-feed p { font-size: 1rem; }

.btn-load-more {
    padding: .8rem 2.5rem;
    background: var(--vn-cream);
    border: 2px solid var(--vn-gold);
    border-radius: 25px; cursor: pointer;
    font-size: .95rem; color: var(--vn-brown);
    font-weight: 600; transition: all .25s;
}
.btn-load-more:hover {
    background: var(--vn-gold); color: #fff;
}
.post-content::first-letter {
    font-size: 1.35rem;
    font-weight: 700;
    color: #8B4513;
}

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #f3ede3;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(#c58a3d, #8B4513);
    border-radius: 20px;
}