:root {
    --navy: #1f4e79;
    --navy-dark: #17375a;
    --bg: #f4f6f8;
    --card: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --border: #e5e7eb;
    --green: #16a34a;
    --red: #dc2626;
    --amber: #d97706;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}

a { color: var(--navy); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 20px 60px;
}

.topbar {
    background: var(--navy);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 24px;
}

.brand {
    color: #fff;
    font-weight: 700;
    font-size: 18px;
}
.brand:hover { text-decoration: none; opacity: 0.9; }

.topnav {
    display: flex;
    align-items: center;
    gap: 14px;
}
.topnav .muted { color: #cbd5e1; }
.navlink { color: #e2e8f0; font-size: 14px; font-weight: 600; }
.navlink:hover { color: #fff; }

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
    margin: 20px 0 28px;
}
.stat-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 18px 20px;
    text-align: center;
}
.stat-value { font-size: 32px; font-weight: 700; color: var(--navy); }
.stat-value.online { color: var(--green); }
.stat-value.blocked { color: var(--red); }
.stat-label { color: var(--muted); font-size: 13px; margin-top: 4px; }

h1, h2 { color: var(--navy-dark); }
h2 { font-size: 18px; margin-top: 32px; }

.table-wrap {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow-x: auto;
}

table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { background: #fafbfc; color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; }
tr:last-child td { border-bottom: none; }

.device-link { font-weight: 600; color: var(--text); }
.device-link:hover { color: var(--navy); }

.muted { color: var(--muted); }
.small { font-size: 12px; }
.nowrap { white-space: nowrap; }

.dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; }
.dot-online { background: var(--green); }
.dot-offline { background: #cbd5e1; }

.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
}
.badge-active { background: #dcfce7; color: var(--green); }
.badge-blocked { background: #fee2e2; color: var(--red); }

.btn {
    display: inline-block;
    border: none;
    border-radius: 6px;
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
}
.btn-small { padding: 6px 12px; font-size: 13px; }
.btn-block { background: var(--red); color: #fff; }
.btn-unblock { background: var(--green); color: #fff; }
.btn-ghost { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,0.5); }
.btn-ghost:hover { background: rgba(255,255,255,0.1); text-decoration: none; }

.inline-form { display: flex; gap: 6px; align-items: center; }
.reason-input {
    padding: 6px 8px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 13px;
    width: 140px;
}

.detail-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px 24px;
    margin-top: 12px;
}
.detail-header { display: flex; align-items: center; gap: 12px; }
.detail-header h1 { margin: 0; font-size: 20px; }

.detail-grid {
    display: grid;
    grid-template-columns: 140px 1fr;
    row-gap: 8px;
    column-gap: 12px;
    margin: 16px 0;
}
.detail-grid dt { color: var(--muted); font-size: 13px; }
.detail-grid dd { margin: 0; }

/* Auth pages (login / setup) */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--navy) 0%, var(--navy-dark) 100%);
}
.auth-card {
    background: var(--card);
    border-radius: 12px;
    padding: 36px 32px;
    width: 100%;
    max-width: 360px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}
.auth-card h1 { margin: 0 0 4px; font-size: 22px; }
.auth-card .subtitle { color: var(--muted); margin: 0 0 20px; font-size: 14px; }
.auth-card form { display: flex; flex-direction: column; gap: 14px; }
.auth-card label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
.auth-card input {
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
}
.auth-card button {
    margin-top: 6px;
    background: var(--navy);
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 11px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
}
.auth-card button:hover { background: var(--navy-dark); }
.auth-card .error { color: var(--red); font-size: 13px; }
.auth-card .success { color: var(--green); font-size: 14px; }
.auth-card .warn { background: #fffbeb; border: 1px solid #fde68a; padding: 10px 12px; border-radius: 6px; font-size: 13px; }