body {
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, #e0e7ff 0%, #f4f6fb 100%);
    margin: 0;
    padding: 0;
    min-height: 100vh;
}
.navbar {
    width: 100%;
    background: rgba(255,255,255,0.85);
    box-shadow: 0 2px 8px rgba(60,60,120,0.08);
    padding: 0 0 0 0;
    position: sticky;
    top: 0;
    z-index: 10;
}
.nav-content {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
    height: 64px;
}
.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1a237e;
    letter-spacing: 1px;
}
.nav-links {
    display: flex;
    gap: 32px;
}
.nav-links a {
    text-decoration: none;
    color: #1565c0;
    font-weight: 500;
    font-size: 1.08rem;
    transition: color 0.2s;
}
.nav-links a:hover {
    color: #0d47a1;
}
.main-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 0 0 0;
}
.container {
    max-width: 500px;
    margin: 48px auto;
    background: rgba(255,255,255,0.7);
    border-radius: 24px;
    box-shadow: 0 8px 32px rgba(60,60,120,0.12);
    padding: 20px 32px 24px 32px;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(200,200,255,0.18);
}
h1 {
    text-align: center;
    color: #1a237e;
    margin-bottom: 24px;
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: 1px;
}
.chatbox {
    height: 400px;
    overflow-y: auto;
    border-radius: 16px;
    padding: 20px;
    background: rgba(245,247,255,0.85);
    margin-bottom: 20px;
    box-shadow: 0 2px 12px rgba(60,60,120,0.06);
    border: 1px solid rgba(200,200,255,0.12);
}
.message {
    margin-bottom: 20px;
    display: flex;
    animation: fadeIn 0.5s;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.user {
    justify-content: flex-end;
}
.user .bubble {
    background: linear-gradient(135deg, #90caf9 0%, #1565c0 100%);
    color: #111;
    align-self: flex-end;
    box-shadow: 0 2px 8px rgba(21,101,192,0.08);
}
.assistant .bubble {
    background: linear-gradient(135deg, #c8e6c9 0%, #388e3c 100%);
    color: #111;
    align-self: flex-start;
    box-shadow: 0 2px 8px rgba(56,142,60,0.08);
}
.bubble {
    padding: 14px 22px;
    border-radius: 20px;
    max-width: 75%;
    word-break: break-word;
    font-size: 1.08rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    transition: box-shadow 0.2s;
}
.bubble:hover {
    box-shadow: 0 4px 16px rgba(60,60,120,0.12);
}
.input-row {
    display: flex;
    gap: 10px;
    margin-top: 8px;
}
input[type="text"] {
    flex: 1;
    padding: 14px 16px;
    border-radius: 12px;
    border: 1px solid #bdbdbd;
    font-size: 1.08rem;
    background: rgba(255,255,255,0.9);
    box-shadow: 0 1px 4px rgba(60,60,120,0.04);
    outline: none;
    transition: border 0.2s, box-shadow 0.2s;
}
input[type="text"]:focus {
    border: 1.5px solid #1565c0;
    box-shadow: 0 2px 8px rgba(21,101,192,0.08);
}
button {
    padding: 14px 28px;
    border-radius: 12px;
    border: none;
    background: linear-gradient(135deg, #1565c0 0%, #90caf9 100%);
    color: #111;
    font-size: 1.08rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(21,101,192,0.08);
    transition: background 0.2s, box-shadow 0.2s;
}
button:hover {
    background: linear-gradient(135deg, #0d47a1 0%, #64b5f6 100%);
    box-shadow: 0 4px 16px rgba(21,101,192,0.12);
}
.disclaimer {
    font-size: 13px;
    color: #666;
    margin-top: 18px;
    text-align: center;
    background: rgba(255,255,255,0.6);
    border-radius: 8px;
    padding: 8px 12px;
    box-shadow: 0 1px 4px rgba(60,60,120,0.04);
}
.about, .contact {
    max-width: 600px;
    margin: 48px auto;
    background: rgba(255,255,255,0.7);
    border-radius: 24px;
    box-shadow: 0 8px 32px rgba(60,60,120,0.12);
    padding: 40px 32px 24px 32px;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(200,200,255,0.18);
}
.about h2, .contact h2 {
    color: #1a237e;
    font-size: 1.5rem;
    margin-bottom: 16px;
}
.about p, .contact p {
    color: #222;
    font-size: 1.08rem;
    margin-bottom: 12px;
}
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.contact-form input, .contact-form textarea {
    padding: 12px;
    border-radius: 8px;
    border: 1px solid #bdbdbd;
    font-size: 1rem;
    background: rgba(255,255,255,0.9);
    box-shadow: 0 1px 4px rgba(60,60,120,0.04);
    outline: none;
    transition: border 0.2s, box-shadow 0.2s;
}
.contact-form input:focus, .contact-form textarea:focus {
    border: 1.5px solid #1565c0;
    box-shadow: 0 2px 8px rgba(21,101,192,0.08);
}
.contact-form button {
    align-self: flex-end;
    padding: 10px 24px;
    border-radius: 8px;
    border: none;
    background: linear-gradient(135deg, #1565c0 0%, #90caf9 100%);
    color: #111;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(21,101,192,0.08);
    transition: background 0.2s, box-shadow 0.2s;
}
.contact-form button:hover {
    background: linear-gradient(135deg, #0d47a1 0%, #64b5f6 100%);
    box-shadow: 0 4px 16px rgba(21,101,192,0.12);
}
@media (max-width: 800px) {
    .nav-content {
        padding: 0 12px;
        height: 56px;
    }
    .nav-logo {
        font-size: 1.15rem;
    }
    .main-content {
        max-width: 100%;
        padding: 0 6px;
    }
    .container, .about, .contact {
        max-width: 98vw;
        margin: 18px auto;
        padding: 16px 8px 18px 8px;
        border-radius: 14px;
    }
    h1 {
        font-size: 1.35rem;
        margin-bottom: 16px;
    }
    .chatbox {
        height: 400px;
        padding: 10px;
        font-size: 0.98rem;
    }
    .bubble {
        font-size: 0.98rem;
        padding: 10px 12px;
        border-radius: 14px;
        max-width: 95vw;
    }
    .input-row {
        flex-direction: column;
        gap: 6px;
    }
    input[type="text"], .contact-form input, .contact-form textarea {
        font-size: 0.98rem;
        padding: 10px;
        border-radius: 8px;
    }
    button, .contact-form button {
        font-size: 0.98rem;
        padding: 10px 18px;
        border-radius: 8px;
    }
    .about, .contact {
        padding: 18px 8px 18px 8px;
    }
    .about h2, .contact h2 {
        font-size: 1.15rem;
        margin-bottom: 10px;
    }
    .about p, .contact p {
        font-size: 0.98rem;
        margin-bottom: 8px;
    }
    .footer nav {
        flex-direction: column;
        gap: 8px;
    }
    .footer {
        padding: 16px 0 8px 0;
    }
    .mobile-menu {
        padding: 16px 0 8px 0;
    }
    .mobile-menu a {
        font-size: 1.05rem;
        margin: 8px 0;
    }
}