.messenger-window {
    max-width: 720px;
    margin: 2rem auto;
    border: 1px solid var(--muted-color, #ddd);
    border-radius: 8px;
    background: white;
}

.messenger-header {
    padding: 1rem;
    border-bottom: 1px solid #eee;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.tutor-status {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #22c55e;
}

.tutor-status.offline {
    background: #94a3b8;
}

.messenger-messages {
    max-height: 400px;
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.messenger-message {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
}

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #e2e8f0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.message-content {
    flex: 1;
    background: #f8fafc;
    padding: 0.75rem;
    border-radius: 8px;
    max-width: 80%;
}

.message-sender {
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.message-time {
    font-size: 0.875rem;
    color: #64748b;
    margin-top: 0.25rem;
}

.messenger-form {
    padding: 1rem;
    border-top: 1px solid #eee;
    display: flex;
    gap: 0.75rem;
}

.messenger-input {
    flex: 1;
    padding: 0.75rem;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    min-height: 42px;
    resize: vertical;
}

.messenger-send {
    padding: 0.75rem 1.5rem;
    background: var(--accent, #1e88e5);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    font-family: 'Roboto', sans-serif;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.messenger-send:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

.messenger-send:active {
    transform: translateY(0);
}

/* Responsive Styles for Tablets */
@media screen and (max-width: 768px) {
    .messenger-window {
        max-width: 100%;
        margin: 1rem;
        border-radius: 6px;
    }

    .messenger-header {
        padding: 0.75rem;
    }

    .messenger-messages {
        max-height: 300px;
        padding: 0.75rem;
        gap: 0.75rem;
    }

    .message-content {
        max-width: 85%;
        padding: 0.6rem;
        font-size: 0.95rem;
    }

    .message-avatar {
        width: 28px;
        height: 28px;
    }

    .messenger-form {
        padding: 0.75rem;
        gap: 0.5rem;
    }

    .messenger-input {
        padding: 0.6rem;
        font-size: 0.95rem;
        min-height: 38px;
    }

    .messenger-send {
        padding: 0.6rem 1rem;
        font-size: 0.95rem;
    }
}

/* Responsive Styles for Small Phones */
@media screen and (max-width: 480px) {
    .messenger-window {
        margin: 0.75rem;
    }

    .messenger-header {
        padding: 0.5rem;
    }

    .messenger-messages {
        max-height: 250px;
        padding: 0.5rem;
        gap: 0.5rem;
    }

    .message-content {
        max-width: 90%;
        padding: 0.5rem;
        font-size: 0.85rem;
        border-radius: 6px;
    }

    .message-avatar {
        width: 24px;
        height: 24px;
        font-size: 0.8rem;
    }

    .message-sender {
        font-size: 0.9rem;
    }

    .message-time {
        font-size: 0.75rem;
    }

    .messenger-form {
        padding: 0.5rem;
        gap: 0.3rem;
        flex-wrap: wrap;
    }

    .messenger-input {
        flex: 1;
        min-width: 150px;
        padding: 0.5rem;
        font-size: 0.85rem;
        min-height: 36px;
    }

    .messenger-send {
        padding: 0.5rem 0.75rem;
        font-size: 0.85rem;
        flex-shrink: 0;
    }

    .messenger-send span:not(.material-icons) {
        display: none;
    }

    .messenger-send .material-icons {
        margin: 0;
    }
}