:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --body-bg: #f4f7f6;
    --card-bg: #ffffff;
    --sent-bg: #007bff;
    --received-bg: #e9ecef;
    --font-family: 'Poppins', sans-serif;
}

body {
    background-color: var(--body-bg);
    font-family: var(--font-family);
    padding-top: 56px;
}

.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,.05);
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    transition: all 0.3s ease;
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

/* Chat Page Styles */
.chat-container {
    padding-top: 2rem;
    padding-bottom: 2rem;
}

#chat-card {
    border-radius: 1rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    height: 80vh;
    display: flex;
    flex-direction: column;
    background-color: var(--card-bg);
}

#chat-box {
    flex-grow: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.message {
    display: flex;
    align-items: flex-end;
    max-width: 75%;
    gap: 0.75rem;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    color: white;
    flex-shrink: 0;
}

.message-body {
    padding: 0.75rem 1.25rem;
    border-radius: 1.5rem;
    position: relative;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    line-height: 1.6;
}

.message-text {
    margin-bottom: 0;
}

.message-time {
    font-size: 0.7rem;
    color: #adb5bd;
    display: block;
    margin-top: 0.25rem;
}

.message.sent {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message.sent .message-body {
    background: var(--sent-bg);
    color: white;
    border-radius: 1.5rem 1.5rem 0.5rem 1.5rem;
}

.message.sent .message-time {
    color: var(--light-color);
    opacity: 0.8;
    text-align: right;
}

.message.received {
    align-self: flex-start;
}

.message.received .message-body {
    background-color: var(--received-bg);
    color: var(--dark-color);
    border-radius: 1.5rem 1.5rem 1.5rem 0.5rem;
}

.message.received .avatar {
    background-color: var(--secondary-color);
}

#message-form .form-control {
    border-radius: 2rem;
    border: 1px solid #ced4da;
    padding: 0.75rem 1.25rem;
}

#message-form .form-control:focus {
    box-shadow: 0 0 0 0.25rem rgba(0, 123, 255, 0.25);
    border-color: var(--primary-color);
}

#send-button {
    border-radius: 2rem;
}

/* Typing Indicator Styles */
.typing-indicator-container {
    padding: 0.5rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.typing-indicator {
    display: flex;
    align-items: center;
    background-color: var(--received-bg);
    border-radius: 1.5rem;
    padding: 0.75rem 1.25rem;
}

.typing-indicator span {
    height: 8px;
    width: 8px;
    background-color: #999;
    border-radius: 50%;
    display: inline-block;
    margin: 0 2px;
    animation: typing 1.2s infinite ease-in-out;
}

.typing-indicator span:nth-of-type(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-of-type(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 100% {
        transform: translateY(0);
        opacity: 0.4;
    }
    50% {
        transform: translateY(-6px);
        opacity: 1;
    }
}

.message.error .message-body {
    background: #dc3545a1;
}

/* Security Page Styles */
.security-tool-card {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.security-tool-card h5 {
    font-weight: 600;
    margin-bottom: 1rem;
}

.security-tool-card p {
    color: var(--secondary-color);
    flex-grow: 1;
}

.security-tool-card .form-control {
    border-radius: 0.5rem;
}

#vpn-status p,
#antivirus-result p {
    padding: 1rem;
    border-radius: 0.5rem;
    background-color: var(--light-color);
    margin-bottom: 0;
    transition: all 0.3s ease;
}

#vpn-status p.connecting,
#antivirus-result p.scanning {
    background-color: #fff3cd; /* Bootstrap warning yellow */
    color: #664d03;
}

#vpn-status p.connected {
    background-color: #d1e7dd; /* Bootstrap success green */
    color: #0f5132;
}