:root {
    color-scheme: light;
    font-family: Inter, system-ui, sans-serif;
    background: #f4f7fb;
    color: #1c1f2a;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
}

.app-shell {
    max-width: 960px;
    margin: 0 auto;
    padding: 24px;
}

.topbar {
    padding: 18px 20px;
    background: #3446f3;
    color: white;
    border-radius: 18px;
    margin-bottom: 16px;
}

.topbar h1 {
    margin: 0 0 8px;
    font-size: 1.6rem;
}

.topbar p {
    margin: 0;
    opacity: 0.85;
}

.card {
    background: white;
    border-radius: 18px;
    padding: 20px;
    box-shadow: 0 18px 45px rgba(25, 41, 112, 0.08);
    margin-bottom: 16px;
}

label {
    display: block;
    margin-bottom: 12px;
    font-size: 0.95rem;
}

input, textarea, button {
    width: 100%;
    font: inherit;
}

input, textarea {
    margin-top: 6px;
    padding: 12px 14px;
    border: 1px solid #d8dbe5;
    border-radius: 14px;
    background: #f9fbff;
}

textarea {
    min-height: 96px;
}

button {
    cursor: pointer;
    padding: 12px 18px;
    border: none;
    border-radius: 14px;
    background: #3446f3;
    color: white;
    font-weight: 600;
    transition: transform 0.15s ease, background 0.15s ease;
}

button.secondary {
    background: #eef2ff;
    color: #26386b;
}

button:hover {
    transform: translateY(-1px);
}

.notice {
    margin-top: 16px;
    padding: 12px 14px;
    border-radius: 14px;
    background: #eef2ff;
    color: #1d2a52;
}

.hidden {
    display: none !important;
}

.divider {
    border-top: 1px solid #e3e7f2;
    margin: 18px 0;
}

.user-info {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
}

.user-info div {
    font-size: 0.95rem;
}

.panel {
    margin-top: 18px;
}

.panel-grid {
    display: grid;
    gap: 16px;
    grid-template-columns: 1fr;
}

.list-item {
    border: 1px solid #edf0f7;
    border-radius: 14px;
    padding: 14px;
    margin-bottom: 14px;
}

.list-button {
    display: block;
    width: 100%;
    text-align: left;
    padding: 12px 14px;
    border: 1px solid #d8dbe5;
    border-radius: 14px;
    margin-bottom: 10px;
    background: white;
}

.chat-box {
    min-height: 220px;
    border: 1px solid #d8dbe5;
    border-radius: 14px;
    padding: 12px;
    margin-bottom: 12px;
    overflow-y: auto;
    background: #f9fbff;
}

.chat-message {
    margin: 10px 0;
    font-size: 0.95rem;
}

@media (min-width: 768px) {
    .panel-grid {
        grid-template-columns: 1fr 1fr;
    }
}