:root {
    --bg: #f4f6f8;
    --panel: #ffffff;
    --ink: #18212f;
    --muted: #657084;
    --line: #d8dee7;
    --brand: #0f6b6f;
    --brand-strong: #0a4a4e;
    --accent: #b52d36;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: Arial, Helvetica, sans-serif;
    letter-spacing: 0;
}

.app-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 250px minmax(0, 1fr);
}

.sidebar {
    background: #10242b;
    color: #fff;
    padding: 18px 14px;
}

.brand {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-bottom: 20px;
}

.brand-mark {
    width: 42px;
    height: 42px;
    flex: 0 0 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #fff;
    border: 1px solid rgba(16,36,43,.12);
    border-radius: 6px;
    overflow: hidden;
}

.brand-mark img {
    display: block;
    width: 34px;
    height: 34px;
    object-fit: contain;
}

.brand small,
.topbar p,
.hint {
    display: block;
    color: var(--muted);
}

.sidebar .brand small {
    color: #b8c6ce;
}

.sidebar nav {
    display: grid;
    gap: 4px;
}

.sidebar a {
    color: #dce7ed;
    text-decoration: none;
    padding: 10px 12px;
    border-radius: 6px;
    font-weight: 600;
}

.sidebar a.active,
.sidebar a:hover {
    color: #fff;
    background: rgba(255,255,255,.12);
}

.content {
    padding: 18px;
    min-width: 0;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 16px;
}

.topbar h1 {
    font-size: 1.45rem;
    margin: 0;
}

.topbar p {
    margin: 2px 0 0;
}

.panel,
.metric {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 16px;
}

.panel h2 {
    font-size: 1.05rem;
    margin: 0 0 12px;
}

.metric span {
    display: block;
    color: var(--muted);
    font-size: .84rem;
}

.metric strong {
    display: block;
    font-size: 1.5rem;
    line-height: 1.2;
}

.workflow {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
}

.workflow div {
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 12px;
    min-height: 92px;
}

.workflow strong,
.workflow span {
    display: block;
}

.workflow span {
    color: var(--muted);
    margin-top: 4px;
}

.mono {
    font-family: Consolas, "Liberation Mono", monospace;
}

.download-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 10px 0 14px;
}

.status-ok {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #e6f6ef;
    color: #116b42;
    border: 1px solid #a9dec6;
    border-radius: 8px;
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.login-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-panel {
    width: min(420px, 100%);
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 22px;
}

.login-brand {
    color: var(--ink);
}

@media (max-width: 860px) {
    .app-shell {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
        padding: 12px;
    }

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

    .content {
        padding: 12px;
    }

    .topbar {
        align-items: flex-start;
        flex-direction: column;
    }

    .workflow {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 420px) {
    .sidebar nav {
        grid-template-columns: 1fr;
    }

    .metric strong {
        font-size: 1.25rem;
    }
}