* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: #0f172a;
    color: #e2e8f0;
    min-height: 100vh;
}
a { color: #38bdf8; }

.omds-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 2rem;
    background: linear-gradient(135deg, #1e3a8a, #0369a1);
    border-bottom: 1px solid #1e293b;
}
.omds-header h1 { font-size: 1.4rem; letter-spacing: 0.02em; }
.btn-ghost {
    background: rgba(255,255,255,0.1);
    color: #fff;
    border: 1px solid rgba(255,255,255,0.25);
    border-radius: 8px;
    padding: 0.45rem 0.9rem;
    cursor: pointer;
    font-size: 0.85rem;
}
.btn-ghost:hover { background: rgba(255,255,255,0.2); }

.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.25rem;
    max-width: 1100px;
    margin: 2.5rem auto;
    padding: 0 1.5rem;
}
.tool-card {
    display: block;
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 14px;
    padding: 1.5rem;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.15s ease, transform 0.15s ease;
}
.tool-card:hover { border-color: #38bdf8; transform: translateY(-2px); }
.tool-card h2 { color: #38bdf8; font-size: 1.15rem; margin-bottom: 0.5rem; }
.tool-card p { color: #94a3b8; font-size: 0.9rem; line-height: 1.4; }
.tool-card-placeholder { opacity: 0.6; }
.tool-card-placeholder:hover { transform: none; border-color: #334155; }

.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}
.login-card {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    width: min(340px, 90vw);
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 14px;
    padding: 2rem;
}
.login-card h1 { text-align: center; color: #38bdf8; }
.login-card .subtitle { text-align: center; color: #94a3b8; font-size: 0.9rem; margin-bottom: 0.5rem; }
.login-card input {
    padding: 0.6rem 0.75rem;
    border-radius: 8px;
    border: 1px solid #475569;
    background: #0f172a;
    color: #e2e8f0;
    font-size: 1rem;
}
.login-card button {
    padding: 0.65rem;
    border-radius: 8px;
    border: none;
    background: #0369a1;
    color: #fff;
    font-weight: 600;
    cursor: pointer;
}
.login-card button:hover { background: #0284c7; }
.login-card .error { color: #f87171; text-align: center; font-size: 0.85rem; }