* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #f4f6f9;
    color: #1f2937;
}
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #eef2f7, #dfe7ef);
}
.login-card {
    width: 400px;
    max-width: 92%;
    background: #fff;
    padding: 38px;
    border-radius: 14px;
    box-shadow: 0 12px 40px rgba(0,0,0,.12);
}
.brand-mark {
    width: 58px;
    height: 58px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #1f4e79;
    color: #fff;
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 18px;
}
h1 { margin: 0 0 7px; font-size: 27px; }
.subtitle { margin: 0 0 28px; color: #6b7280; }
label { display: block; margin: 15px 0 7px; font-weight: 600; }
input {
    width: 100%;
    padding: 12px 13px;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    font-size: 15px;
}
input:focus { outline: none; border-color: #1f4e79; }
.btn {
    border: 0;
    padding: 12px 18px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 700;
}
.primary { background: #1f4e79; color: #fff; }
.full { width: 100%; margin-top: 24px; }
.alert { padding: 11px 13px; border-radius: 8px; margin-bottom: 15px; }
.error { background: #fee2e2; color: #991b1b; }
.login-note { text-align: center; color: #9ca3af; font-size: 13px; margin: 22px 0 0; }

.topbar {
    height: 64px;
    background: #1f4e79;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 25px;
}
.topbar-brand { font-size: 20px; font-weight: 700; }
.topbar-user { display: flex; align-items: center; gap: 15px; font-size: 14px; }
.topbar-user span { opacity: .75; }
.topbar-user a { color: #fff; text-decoration: none; font-weight: 700; }

.layout { display: flex; min-height: calc(100vh - 64px); }
.sidebar {
    width: 220px;
    background: #fff;
    border-right: 1px solid #e5e7eb;
    padding: 20px 12px;
}
.sidebar a {
    display: block;
    padding: 12px 14px;
    margin-bottom: 5px;
    border-radius: 7px;
    color: #374151;
    text-decoration: none;
}
.sidebar a:hover, .sidebar a.active { background: #e8f0f7; color: #1f4e79; font-weight: 700; }
.content { flex: 1; padding: 30px; }
.page-heading { margin-bottom: 25px; }
.page-heading h2 { margin: 0 0 5px; font-size: 28px; }
.page-heading p { margin: 0; color: #6b7280; }

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 18px;
}
.stat-card {
    background: #fff;
    border-radius: 12px;
    padding: 22px;
    box-shadow: 0 2px 10px rgba(0,0,0,.05);
    border: 1px solid #e5e7eb;
}
.stat-card.warning { border-left: 5px solid #d97706; }
.stat-label { color: #6b7280; font-size: 14px; }
.stat-value { font-size: 32px; font-weight: 700; margin-top: 9px; }
.welcome-panel {
    background: #fff;
    margin-top: 25px;
    padding: 25px;
    border-radius: 12px;
    border: 1px solid #e5e7eb;
}
.welcome-panel h3 { margin-top: 0; }

@media (max-width: 700px) {
    .sidebar { width: 180px; }
    .topbar-user span { display: none; }
}