* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: #f4f7f6;
    color: #17211d;
    font-family: Arial, Helvetica, sans-serif;
}

a {
    color: inherit;
    text-decoration: none;
}

.app {
    min-height: 100vh;
    display: flex;
}

.sidebar {
    width: 270px;
    background: #0d1f18;
    color: #fff;
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0 auto 0 0;
}

.brand {
    padding: 24px;
    display: flex;
    gap: 14px;
    align-items: center;
    border-bottom: 1px solid rgba(255,255,255,.08);
}

.brand-icon {
    width: 46px;
    height: 46px;
    border-radius: 16px;
    background: #25d366;
    color: #062116;
    display: grid;
    place-items: center;
    font-weight: 800;
    font-size: 22px;
}

.brand strong {
    display: block;
    font-size: 18px;
}

.brand span {
    display: block;
    color: rgba(255,255,255,.65);
    font-size: 13px;
    margin-top: 4px;
}

.menu {
    padding: 18px 14px;
    display: grid;
    gap: 6px;
}

.menu a {
    padding: 13px 14px;
    border-radius: 12px;
    color: rgba(255,255,255,.76);
    font-size: 15px;
}

.menu a:hover,
.menu a.active {
    background: rgba(37,211,102,.14);
    color: #fff;
}

.sidebar-user {
    margin-top: auto;
    padding: 20px 24px;
    border-top: 1px solid rgba(255,255,255,.08);
}

.sidebar-user small {
    display: block;
    color: rgba(255,255,255,.55);
    margin-top: 4px;
}

.sidebar-user a {
    display: inline-block;
    margin-top: 12px;
    color: #25d366;
    font-size: 14px;
}

.main {
    margin-left: 270px;
    width: calc(100% - 270px);
}

.topbar {
    padding: 28px 34px 10px;
}

.topbar h1 {
    margin: 0;
    font-size: 30px;
    letter-spacing: -0.8px;
}

.topbar p {
    margin: 8px 0 0;
    color: #65736d;
}

.content {
    padding: 18px 34px 40px;
}

.grid {
    display: grid;
    gap: 18px;
}

.grid-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
    background: #fff;
    border: 1px solid #e2e8e5;
    border-radius: 22px;
    padding: 22px;
    box-shadow: 0 18px 45px rgba(12, 31, 25, .06);
}

.stat-value {
    font-size: 34px;
    font-weight: 800;
    letter-spacing: -1px;
}

.stat-label {
    color: #66756f;
    margin-top: 8px;
}

.table-wrap {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th {
    text-align: left;
    color: #66756f;
    font-size: 13px;
    font-weight: 700;
    padding: 12px 10px;
    border-bottom: 1px solid #e4ebe7;
}

.table td {
    padding: 14px 10px;
    border-bottom: 1px solid #edf2ef;
    vertical-align: middle;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 10px;
    border-radius: 99px;
    font-size: 12px;
    font-weight: 700;
    background: #eef4f1;
    color: #32443c;
}

.badge.green {
    background: #dff8e9;
    color: #14733b;
}

.badge.red {
    background: #fde5e5;
    color: #a92d2d;
}

.badge.dark {
    background: #162820;
    color: #fff;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 0;
    border-radius: 12px;
    padding: 10px 14px;
    background: #17211d;
    color: #fff;
    cursor: pointer;
    font-weight: 700;
}

.btn.secondary {
    background: #eef4f1;
    color: #17211d;
}

.form-row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 18px;
}

.input,
.select {
    width: 100%;
    max-width: 320px;
    border: 1px solid #dbe5e0;
    background: #fff;
    border-radius: 12px;
    padding: 12px 14px;
    font-size: 14px;
}

.login-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    background:
        radial-gradient(circle at 20% 20%, rgba(37,211,102,.25), transparent 30%),
        #0d1f18;
}

.login-card {
    width: min(440px, calc(100% - 32px));
    background: #fff;
    padding: 34px;
    border-radius: 26px;
    box-shadow: 0 30px 80px rgba(0,0,0,.25);
}

.login-card h1 {
    margin: 0 0 8px;
}

.login-card p {
    margin: 0 0 24px;
    color: #66756f;
}

.login-card label {
    display: block;
    margin: 14px 0 7px;
    font-weight: 700;
}

.login-card input {
    width: 100%;
    border: 1px solid #dbe5e0;
    border-radius: 12px;
    padding: 13px 14px;
    font-size: 15px;
}

.login-card button {
    margin-top: 20px;
    width: 100%;
}

.alert {
    border-radius: 14px;
    padding: 13px 15px;
    margin-bottom: 16px;
}

.alert.error {
    background: #fde5e5;
    color: #982424;
}

.alert.success {
    background: #dff8e9;
    color: #14733b;
}

.chat-layout {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 18px;
}

.chat-list {
    display: grid;
    gap: 8px;
    max-height: calc(100vh - 185px);
    overflow-y: auto;
}

.chat-item {
    display: flex;
    gap: 12px;
    align-items: center;
    padding: 12px;
    border-radius: 16px;
    border: 1px solid #edf2ef;
    background: #fff;
}

.chat-item:hover,
.chat-item.active {
    border-color: #25d366;
    background: #f4fff8;
}

.avatar {
    width: 46px;
    height: 46px;
    border-radius: 16px;
    background: #dff8e9;
    color: #14733b;
    display: grid;
    place-items: center;
    font-weight: 800;
    flex: 0 0 auto;
}

.chat-meta {
    min-width: 0;
    flex: 1;
}

.chat-meta strong {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.chat-meta small {
    display: block;
    color: #66756f;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-top: 4px;
}

.messages-box {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-height: calc(100vh - 220px);
    overflow-y: auto;
    padding: 8px;
}

.message {
    max-width: 72%;
    padding: 12px 14px;
    border-radius: 16px;
    background: #fff;
    border: 1px solid #e7eeea;
}

.message.me {
    margin-left: auto;
    background: #dff8e9;
    border-color: #c9f2d9;
}

.message small {
    display: block;
    color: #66756f;
    margin-top: 8px;
    font-size: 11px;
}

.empty {
    text-align: center;
    padding: 44px;
    color: #66756f;
}

pre.json {
    white-space: pre-wrap;
    word-break: break-word;
    background: #0d1f18;
    color: #dff8e9;
    padding: 16px;
    border-radius: 16px;
    max-height: 460px;
    overflow: auto;
}

@media (max-width: 1000px) {
    .sidebar {
        position: static;
        width: 100%;
    }

    .app {
        display: block;
    }

    .main {
        margin-left: 0;
        width: 100%;
    }

    .grid-4,
    .grid-2,
    .chat-layout {
        grid-template-columns: 1fr;
    }
}


.codebox {
    background: #f4f7f6;
    border: 1px solid #dfe9e4;
    border-radius: 16px;
    padding: 14px 16px;
    word-break: break-all;
    color: #17211d;
}