* { box-sizing: border-box; }
html, body {
    margin: 0; padding: 0; height: 100%;
    background: var(--color-background);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: var(--fs-body);
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
button, input {
    font-family: inherit; font-size: inherit; color: inherit;
    background: transparent; border: none;
}
::selection { background: var(--color-accent-soft); }

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

.sidebar {
    width: var(--sidebar-width); flex-shrink: 0;
    background: var(--color-surface-solid);
    border-right: 1px solid var(--color-border);
    padding: 1.5rem 1rem; display: flex; flex-direction: column; gap: 0.25rem;
}
.sidebar-brand {
    font-family: var(--font-display); font-weight: 700; letter-spacing: var(--tracking-wide);
    text-transform: uppercase; font-size: var(--fs-small); color: var(--color-text-muted);
    padding: 0 0.75rem 1.5rem;
}
.sidebar-brand strong { color: var(--color-text); }
.nav-link {
    display: flex; align-items: center; gap: 0.6rem;
    padding: 0.6rem 0.75rem; border-radius: var(--radius-small);
    color: var(--color-text-muted); text-decoration: none; font-size: var(--fs-small);
    cursor: pointer; transition: background 0.15s var(--ease-out), color 0.15s var(--ease-out);
}
.nav-link:hover { background: var(--color-surface); color: var(--color-text); }
.nav-link.active { background: var(--color-surface-hover); color: var(--color-text); box-shadow: var(--glow-card); }
.nav-link.logout { margin-top: auto; }

.main { flex: 1; padding: 2rem 2.5rem; max-width: 1400px; }
.page-title { font-family: var(--font-display); font-size: var(--fs-h1); font-weight: 700; margin: 0 0 1.5rem; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; margin-bottom: 2rem; }

.card {
    background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--radius-medium); padding: 1.25rem; box-shadow: var(--glow-card);
}
.card-label { font-size: var(--fs-tiny); text-transform: uppercase; letter-spacing: var(--tracking-wide); color: var(--color-text-faint); margin-bottom: 0.5rem; }
.card-value { font-family: var(--font-display); font-size: 1.8rem; font-weight: 700; }
.card-sub { font-size: var(--fs-small); color: var(--color-text-muted); margin-top: 0.25rem; }

.status-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 0.4rem; }
.status-dot.ok { background: var(--color-ok); box-shadow: 0 0 8px var(--color-ok); }
.status-dot.warn { background: var(--color-warn); }
.status-dot.error { background: var(--color-error); }
.status-dot.unknown { background: var(--color-unknown); }

.badge {
    display: inline-block; font-size: var(--fs-tiny); padding: 0.2rem 0.6rem;
    border-radius: 999px; border: 1px solid var(--color-border-strong); color: var(--color-text-muted);
    text-transform: uppercase; letter-spacing: 0.05em;
}

table { width: 100%; border-collapse: collapse; font-size: var(--fs-small); }
th { text-align: left; color: var(--color-text-faint); font-weight: 500; text-transform: uppercase; font-size: var(--fs-tiny); letter-spacing: var(--tracking-wide); padding: 0.6rem 0.75rem; border-bottom: 1px solid var(--color-border); }
td { padding: 0.6rem 0.75rem; border-bottom: 1px solid var(--color-border); color: var(--color-text-muted); }
tr:hover td { background: var(--color-surface); color: var(--color-text); }

.empty-state {
    color: var(--color-text-faint); font-size: var(--fs-small);
    border: 1px dashed var(--color-border-strong); border-radius: var(--radius-medium);
    padding: 2rem; text-align: center;
}

/* --- Login page --- */
.login-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.login-card {
    width: 340px; background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--radius-large); padding: 2.5rem; box-shadow: var(--shadow-large), var(--glow-card);
}
.login-title { font-family: var(--font-display); font-size: var(--fs-h2); font-weight: 700; margin: 0 0 0.25rem; }
.login-sub { color: var(--color-text-muted); font-size: var(--fs-small); margin-bottom: 1.5rem; }
.field { margin-bottom: 1rem; }
.field label { display: block; font-size: var(--fs-tiny); color: var(--color-text-faint); text-transform: uppercase; letter-spacing: var(--tracking-wide); margin-bottom: 0.4rem; }
.field input {
    width: 100%; padding: 0.65rem 0.8rem; background: rgba(255,255,255,0.02);
    border: 1px solid var(--color-border); border-radius: var(--radius-small);
}
.field input:focus { outline: none; border-color: var(--color-border-strong); box-shadow: var(--glow-accent); }
.btn-primary {
    width: 100%; padding: 0.7rem; background: var(--color-text); color: #000;
    border-radius: var(--radius-small); font-weight: 600; cursor: pointer;
    transition: opacity 0.15s;
}
.btn-primary:hover { opacity: 0.85; }
.login-error { color: var(--color-error); font-size: var(--fs-small); margin-top: 0.75rem; min-height: 1.2em; }