* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: #10121b;
    color: white;
    font-family: Arial, sans-serif;
}

header {
    text-align: center;
    padding: 25px;
    background: #191d2b;
    border-bottom: 1px solid #30364a;
}

header h1 {
    margin: 0;
    font-size: 36px;
}

header h1 span {
    color: #65aaff;
}

header p {
    color: #aab2c5;
}

main {
    max-width: 850px;
    margin: 30px auto;
    padding: 15px;
}

#chat {
    height: 400px;
    overflow-y: auto;
    background: #191d2b;
    border: 1px solid #30364a;
    border-radius: 12px;
    padding: 20px;
}

.message {
    padding: 13px 16px;
    margin-bottom: 15px;
    border-radius: 12px;
    max-width: 80%;
    line-height: 1.5;
    overflow-wrap: anywhere;
    white-space: pre-wrap;
}

.ai {
    background: #29344a;
    margin-right: auto;
}

.user {
    background: #2469bd;
    margin-left: auto;
}

.input-area {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

input {
    flex: 1;
    min-width: 0;
    padding: 15px;
    border: 1px solid #30364a;
    border-radius: 10px;
    background: #191d2b;
    color: white;
    font-size: 16px;
}

button {
    padding: 15px 22px;
    background: #3987e8;
    border: none;
    border-radius: 10px;
    color: white;
    font-size: 16px;
    cursor: pointer;
}

button:hover {
    background: #2670cc;
}

footer {
    text-align: center;
    color: #778096;
    padding: 20px;
}

.chat-toolbar {
    display: flex;
    gap: 10px;
    margin-bottom: 12px;
}

.chat-toolbar button {
    background: #29344a;
    border: 1px solid #46536d;
}

.chat-toolbar button:hover {
    background: #3b4b68;
}

#status {
    color: #aab2c5;
    font-size: 13px;
    min-height: 18px;
}