:root {
    --color-bg: #0f1720;
    --color-surface: #17212c;
    --color-surface-alt: #1e2b38;
    --color-border: #2a3a48;
    --color-text: #e6edf3;
    --color-text-muted: #93a3b0;
    --color-accent: #3fa9f5;
    --color-accent-dark: #2b7fc0;
    --color-success: #3fbf6f;
    --color-danger: #e5534b;
    --radius: 6px;
}

* { box-sizing: border-box; }

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

.topbar {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 12px 24px;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.brand {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--color-accent);
    text-decoration: none;
}

.topbar nav { display: flex; gap: 16px; flex: 1; }
.topbar nav a { color: var(--color-text-muted); text-decoration: none; font-size: 0.9rem; }
.topbar nav a:hover { color: var(--color-text); }

.user-info { display: flex; align-items: center; gap: 12px; font-size: 0.85rem; color: var(--color-text-muted); }
.user-info a { color: var(--color-accent); text-decoration: none; }

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

h1, h2, h3 { font-weight: 600; }

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
}

table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--color-border); }
th { color: var(--color-text-muted); font-weight: 600; text-transform: uppercase; font-size: 0.75rem; letter-spacing: 0.03em; }
tr:hover td { background: var(--color-surface-alt); }

.btn {
    display: inline-block;
    background: var(--color-accent);
    color: #05202f;
    border: none;
    border-radius: var(--radius);
    padding: 8px 16px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
}
.btn:hover { background: var(--color-accent-dark); color: #fff; }
.btn-secondary { background: var(--color-surface-alt); color: var(--color-text); border: 1px solid var(--color-border); }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 0.75rem; font-weight: 600; }
.badge-success { background: rgba(63,191,111,0.15); color: var(--color-success); }
.badge-danger { background: rgba(229,83,75,0.15); color: var(--color-danger); }
.badge-muted { background: rgba(147,163,176,0.15); color: var(--color-text-muted); }

.flash { padding: 12px 16px; border-radius: var(--radius); margin-bottom: 16px; }
.flash-info { background: rgba(63,169,245,0.12); color: var(--color-accent); }
.flash-success { background: rgba(63,191,111,0.12); color: var(--color-success); }
.flash-error { background: rgba(229,83,75,0.12); color: var(--color-danger); }

.form-group { margin-bottom: 14px; }
.form-group label { display: block; margin-bottom: 6px; font-size: 0.85rem; color: var(--color-text-muted); }
.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 8px 10px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-text);
    font-size: 0.9rem;
}

.login-shell { max-width: 360px; margin: 80px auto; }

.tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.tabs a { padding: 6px 14px; border-radius: var(--radius); text-decoration: none; color: var(--color-text-muted); font-size: 0.85rem; }
.tabs a.active { background: var(--color-accent); color: #05202f; }