/* forum.css */

/* --- Tái sử dụng Variables --- */
:root {
    --f-primary: #2563eb;
    --f-primary-hover: #1d4ed8;
    --f-border: #e5e7eb;
    --f-bg-light: #f9fafb;
    --f-text-main: #1f2937;
    --f-text-sub: #6b7280;
    --f-red: #ef4444;
}

/* --- Common Buttons & Elements --- */
.btn-primary {
    background: var(--f-primary);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}
.btn-primary:hover {
    background: var(--f-primary-hover);
}

.btn-outline {
    background: white;
    color: var(--f-text-main);
    border: 1px solid var(--f-border);
    padding: 8px 15px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}
.btn-outline:hover {
    background: var(--f-bg-light);
    border-color: #d1d5db;
}

.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.1em;
    padding: 5px;
    opacity: 0.7;
    transition: opacity 0.2s;
}
.btn-icon:hover {
    opacity: 1;
}

.badge {
    background: var(--f-red);
    color: white;
    font-size: 0.75em;
    padding: 2px 6px;
    border-radius: 10px;
    margin-left: 5px;
    font-weight: bold;
}

/* --- TAB: Chat Công Khai --- */
.chat-container {
    display: flex;
    flex-direction: column;
    height: 500px;
    border: 1px solid var(--f-border);
    border-radius: 12px;
    overflow: hidden;
    background: var(--f-bg-light);
}

.chat-messages {
    flex: 1;
    padding: 15px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.chat-msg {
    display: flex;
    flex-direction: column;
    max-width: 80%;
}
.chat-msg.mine {
    align-self: flex-end;
}
.chat-msg.others {
    align-self: flex-start;
}

.msg-info {
    font-size: 0.75em;
    color: var(--f-text-sub);
    margin-bottom: 3px;
    display: flex;
    gap: 5px;
}
.chat-msg.mine .msg-info {
    justify-content: flex-end;
}

.msg-bubble {
    padding: 10px 15px;
    border-radius: 15px;
    font-size: 0.95em;
    line-height: 1.4;
    word-break: break-word;
}
.chat-msg.mine .msg-bubble {
    background: var(--f-primary);
    color: white;
    border-bottom-right-radius: 3px;
}
.chat-msg.others .msg-bubble {
    background: white;
    color: var(--f-text-main);
    border: 1px solid var(--f-border);
    border-bottom-left-radius: 3px;
}

.chat-input-area {
    display: flex;
    padding: 15px;
    background: white;
    border-top: 1px solid var(--f-border);
    gap: 10px;
}

.chat-input-area input {
    flex: 1;
    padding: 12px 15px;
    border: 1px solid var(--f-border);
    border-radius: 20px;
    outline: none;
    font-size: 0.95em;
}
.chat-input-area input:focus {
    border-color: var(--f-primary);
}

.chat-input-area button {
    background: var(--f-primary);
    color: white;
    border: none;
    padding: 0 20px;
    border-radius: 20px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.2s;
}
.chat-input-area button:hover {
    background: var(--f-primary-hover);
}

/* --- TAB: Hỏi Đáp --- */
.qa-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    gap: 15px;
    flex-wrap: wrap;
}

.qa-search {
    flex: 1;
    min-width: 200px;
}
.qa-search input {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid var(--f-border);
    border-radius: 8px;
    outline: none;
    box-sizing: border-box;
}

.qa-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.qa-post-card {
    border: 1px solid var(--f-border);
    border-radius: 10px;
    padding: 15px;
    cursor: pointer;
    transition: box-shadow 0.2s, transform 0.2s;
    background: white;
}
.qa-post-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    transform: translateY(-2px);
    border-color: #d1d5db;
}

.qa-post-title {
    font-size: 1.1em;
    font-weight: 700;
    margin: 0 0 8px 0;
    color: var(--f-text-main);
}

.qa-post-preview {
    color: var(--f-text-sub);
    font-size: 0.95em;
    margin: 0 0 10px 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.qa-post-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.8em;
    color: #9ca3af;
}
.qa-post-meta .author {
    font-weight: 600;
    color: var(--f-text-main);
}

/* Post Detail View (Rendered via SweetAlert or dynamically inside the tab) */
.post-detail-container {
    text-align: left;
}
.post-detail-title {
    font-size: 1.5em;
    font-weight: bold;
    margin-bottom: 10px;
}
.post-detail-meta {
    font-size: 0.85em;
    color: var(--f-text-sub);
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--f-border);
}
.post-detail-content {
    font-size: 1em;
    line-height: 1.6;
    margin-bottom: 30px;
    white-space: pre-wrap;
}
.replies-section {
    margin-top: 20px;
    border-top: 2px dashed var(--f-border);
    padding-top: 20px;
}
.reply-item {
    background: var(--f-bg-light);
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 10px;
}
.reply-meta {
    font-size: 0.8em;
    color: var(--f-text-sub);
    margin-bottom: 5px;
}
.reply-meta strong {
    color: var(--f-text-main);
}
.reply-text {
    font-size: 0.95em;
}


/* --- TAB: Bạn Bè & Nhắn Tin --- */
.friends-layout {
    display: flex;
    gap: 20px;
    height: 600px;
}

.friends-sidebar {
    width: 280px;
    border: 1px solid var(--f-border);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    background: white;
}

.friends-actions {
    padding: 15px;
    border-bottom: 1px solid var(--f-border);
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.friends-actions button {
    flex: 1;
    font-size: 0.85em;
}

.sidebar-title {
    font-size: 0.9em;
    font-weight: 700;
    color: var(--f-text-sub);
    text-transform: uppercase;
    margin: 15px 15px 10px 15px;
}

.friends-list {
    flex: 1;
    overflow-y: auto;
    padding: 0 10px 10px 10px;
}

.friend-item {
    display: flex;
    align-items: center;
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    transition: 0.2s;
    margin-bottom: 5px;
}
.friend-item:hover, .friend-item.active {
    background: var(--f-bg-light);
}
.friend-avatar {
    width: 40px;
    height: 40px;
    background: #e0e7ff;
    color: var(--f-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2em;
    margin-right: 12px;
}
.friend-info {
    flex: 1;
    overflow: hidden;
}
.friend-name {
    font-weight: 600;
    font-size: 0.95em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.friend-status {
    font-size: 0.75em;
    color: #10b981; /* Default online color or just text */
}

.friends-main {
    flex: 1;
    border: 1px solid var(--f-border);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    background: white;
}
.friends-main.placeholder-view {
    justify-content: center;
    align-items: center;
    background: var(--f-bg-light);
}

.dm-header {
    padding: 15px 20px;
    border-bottom: 1px solid var(--f-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.dm-header h3 {
    margin: 0;
    font-size: 1.1em;
}

.dm-messages {
    flex: 1;
    padding: 15px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: var(--f-bg-light);
}

@media (max-width: 768px) {
    .friends-layout {
        flex-direction: column;
        height: 700px;
    }
    .friends-sidebar {
        width: 100%;
        height: 300px;
    }
    .friends-main {
        height: 400px;
    }
}