body {
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    margin: 0;
    color: #111;
}

.container {
    display: grid;
    grid-template-columns: 320px 1fr;
    height: 100vh;
}

.sidebar {
    border-right: 1px solid #e5e5e5;
    padding: 16px;
    overflow: auto;
}

.content {
    display: grid;
    grid-template-rows: auto 1fr auto;
    height: 100vh;
}

.topbar {
    padding: 12px 16px;
    border-bottom: 1px solid #e5e5e5;
    background: #fafafa;
}

.chat {
    padding: 16px;
    overflow: auto;
    background: #f6f7f9;
}

.composer {
    display: flex;
    gap: 8px;
    padding: 12px;
    border-top: 1px solid #e5e5e5;
    background: #fff;
}

.composer input[type="text"] {
    flex: 1;
    padding: 10px;
    border: 1px solid #d0d7de;
    border-radius: 8px;
}

.composer button {
    padding: 10px 12px;
    border: 1px solid #d0d7de;
    border-radius: 8px;
    background: #111;
    color: white;
    cursor: pointer;
}

.composer input[type="file"] {
    display: none;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 10px;
    border: 1px solid #d0d7de;
    border-radius: 8px;
    background: white;
    cursor: pointer;
}

.btn.active {
    background: #111;
    color: white;
    border-color: #111;
}

.list {
    display: grid;
    gap: 8px;
}

.list-item {
    padding: 10px;
    border: 1px solid #e5e5e5;
    border-radius: 8px;
    background: white;
    cursor: pointer;
    transition: background 0.15s, box-shadow 0.15s;
    display: grid;
    gap: 4px;
}

.list-item.active {
    border-color: #111;
}

.list-item.highlight {
    background: #1e3a5f;
    color: white;
    box-shadow: 0 0 0 1px #0d47a1;
}

.list-item.highlight * {
    color: white !important;
}

.list-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 6px;
}

.copy-btn {
    font-size: 11px;
    padding: 4px 6px;
    border-radius: 6px;
    border: 1px solid #d0d7de;
    background: #f5f5f5;
    cursor: pointer;
}

.msg {
    max-width: 70%;
    margin: 6px 0;
    padding: 10px 12px;
    border-radius: 12px;
    background: white;
    border: 1px solid #e5e5e5;
}

.msg.me {
    background: #e7f0ff;
    border-color: #c9dcff;
}

.msg img {
    max-width: 280px;
    border-radius: 8px;
}

.meta {
    font-size: 12px;
    color: #666;
    margin-bottom: 2px;
}

.row {
    display: grid;
    gap: 8px;
}

.row2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.field {
    display: grid;
    gap: 6px;
}

.field input {
    padding: 8px 10px;
    border: 1px solid #d0d7de;
    border-radius: 6px;
}

.actions {
    display: flex;
    gap: 8px;
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: white;
    padding: 24px;
    border-radius: 12px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.modal-content h3 {
    margin-top: 0;
}

#settingsBtn {
    background: #28a745;
    color: white;
    border-color: #28a745;
}

#depositBtn {
    background: #28a745;
    color: white;
    border-color: #28a745;
}

#withdrawBtn {
    background: #dc3545;
    color: white;
    border-color: #dc3545;
}