.main-career {
    padding-top: 160px;
    padding-bottom: 60px;
    min-height: 100vh;
}
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 24px;
}
.chat-card {
    background: var(--card-bg, #0d1117);
    border: 1px solid var(--border-soft, rgba(255,255,255,0.08));
    border-radius: 32px;
    box-shadow: var(--white-glow, 0 10px 30px -5px rgba(0,0,0,0.3));
    overflow: hidden;
    display: flex;
    flex-direction: column;
    /* dvh tính theo viewport thật trên mobile (trừ thanh địa chỉ Safari/Chrome);
       dòng 100vh phía trên là fallback cho trình duyệt cũ */
    height: calc(100vh - 220px);
    height: calc(100dvh - 220px);
    min-height: 500px;
}
.chat-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-soft, rgba(255,255,255,0.08));
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}
.header-info {
    display: flex;
    align-items: center;
    gap: 16px;
}
.header-info h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text-white, #ffffff);
}
.header-info p {
    color: var(--text-gray, rgba(255,255,255,0.6));
    font-size: 0.85rem;
}
.btn-reset {
    background: rgba(255, 77, 77, 0.2);
    border: 1px solid rgba(255, 77, 77, 0.5);
    color: #ff9999;
    padding: 8px 16px;
    border-radius: 30px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: 0.2s;
}
.btn-reset:hover {
    background: #ff4d4d;
    color: white;
    border-color: #ff4d4d;
}
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.message {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    max-width: 85%;
}
.message.user {
    align-self: flex-end;
    flex-direction: row-reverse;
}
.message .avatar {
    width: 36px;
    height: 36px;
    background: var(--primary-blue, #007AFF);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.message.user .avatar {
    background: #2c3e66;
}
.message .avatar i {
    font-size: 1.2rem;
    color: white;
}
.message .content {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 18px;
    padding: 12px 18px;
    border: 1px solid var(--border-soft, rgba(255,255,255,0.08));
    color: var(--text-white, #ffffff);
    line-height: 1.5;
    font-size: 0.9rem;
}
.message.user .content {
    background: var(--user-bubble-bg, var(--primary-blue, #007AFF));
    border-color: var(--user-bubble-bg, var(--primary-blue, #007AFF));
    color: #ffffff;
}
.message .content p {
    margin: 0;
    white-space: pre-wrap;
}
.chat-input-area {
    padding: 20px 24px;
    border-top: 1px solid var(--border-soft, rgba(255,255,255,0.08));
    display: flex;
    gap: 12px;
    background: var(--card-bg, #0d1117);
}
.chat-input-area textarea {
    flex: 1;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-soft, rgba(255,255,255,0.08));
    border-radius: 24px;
    padding: 12px 18px;
    color: white;
    font-family: inherit;
    font-size: 0.9rem;
    resize: none;
    outline: none;
    transition: 0.2s;
}
.chat-input-area textarea:focus {
    border-color: var(--primary-blue, #007AFF);
}
.btn-send {
    background: var(--primary-blue, #007AFF);
    border: none;
    padding: 0 24px;
    border-radius: 40px;
    font-weight: 600;
    color: white;
    cursor: pointer;
    transition: 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}
.btn-send:hover {
    transform: scale(1.02);
    box-shadow: 0 4px 12px rgba(var(--primary-rgb), 0.4);
}
.chat-messages::-webkit-scrollbar {
    width: 6px;
}
.chat-messages::-webkit-scrollbar-track {
    background: rgba(255,255,255,0.05);
    border-radius: 10px;
}
.chat-messages::-webkit-scrollbar-thumb {
    background: var(--primary-blue, #007AFF);
    border-radius: 10px;
}
.quick-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 0 24px 12px;
    background: var(--card-bg, #0d1117);
}
.quick-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(var(--primary-rgb), 0.12);
    border: 1px solid rgba(var(--primary-rgb), 0.35);
    color: var(--primary-blue, #007AFF);
    padding: 7px 14px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 500;
    cursor: pointer;
    transition: 0.2s;
    font-family: inherit;
}
.quick-action-btn:hover {
    background: var(--primary-blue, #007AFF);
    color: white;
    border-color: var(--primary-blue, #007AFF);
    transform: translateY(-1px);
}
@media (max-width: 768px) {
    .main-career { padding-top: 100px; padding-bottom: 16px; } /* navbar mobile cao 64px */
    .container { padding: 0 12px; }
    .chat-card {
        height: calc(100vh - 132px);
        height: calc(100dvh - 132px);
        min-height: 420px;
        border-radius: 20px;
    }
    .chat-header { flex-direction: column; align-items: flex-start; padding: 14px 16px; }
    .header-info h2 { font-size: 1.15rem; }
    .header-info p { font-size: 0.75rem; }
    .header-info i { font-size: 22px !important; }
    .chat-messages { padding: 14px 12px; gap: 14px; }
    .message { max-width: 95%; }
    .message .content { font-size: 0.88rem; padding: 10px 14px; }
    .chat-input-area { padding: 12px 12px calc(12px + env(safe-area-inset-bottom)); }
    /* 16px để iOS Safari không tự zoom khi focus vào ô nhập */
    .chat-input-area textarea { font-size: 16px; padding: 10px 14px; }
    .btn-send { padding: 0 16px; font-size: 0.85rem; }
    .quick-actions { padding: 0 12px 10px; }
}