* { box-sizing: border-box; }

body {
    font-family: Arial, sans-serif;
    margin: 20px;
    background-color: #f4f6f9;
    color: #333;
}

h1, h2, h3 { color: #333; margin: 0; }

a { color: inherit; }

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: white;
    padding: 15px 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 6px;
    margin-bottom: 20px;
    background: white;
    padding: 6px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.tab-btn {
    flex: 1;
    padding: 10px 15px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: #555;
    font-weight: bold;
    cursor: pointer;
    font-size: 14px;
}
.tab-btn:hover { background: #f0f2f5; }
.tab-btn.active { background: #007bff; color: white; }

.tab-content { display: none; }
.tab-content.active { display: block; }

/* Cards */
.card {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

/* Stat cards (dashboard) */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 15px;
}
.stat-card {
    background: white;
    padding: 18px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.stat-label { color: #777; font-size: 13px; font-weight: bold; text-transform: uppercase; }
.stat-value { font-size: 28px; font-weight: bold; color: #333; }
.stat-up .stat-value { color: #28a745; }
.stat-down .stat-value { color: #dc3545; }

/* Tables */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; margin-top: 10px; min-width: 700px; }
th, td { border: 1px solid #ddd; padding: 10px; text-align: left; }
th { background-color: #007bff; color: white; }
tr.row-inactive { opacity: 0.5; }

/* Badges */
.badge { font-weight: bold; padding: 3px 8px; border-radius: 4px; font-size: 12px; }
.badge-up { color: #28a745; }
.badge-down { color: #dc3545; }
.badge-inactive { color: #999; }

/* Forms */
label { display: block; margin-top: 10px; font-weight: bold; color: #555; font-size: 13px; }
input[type=text], input[type=password], input[type=number] {
    padding: 8px;
    margin: 5px 0;
    border: 1px solid #ccc;
    border-radius: 4px;
    width: 100%;
}
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { margin-bottom: 10px; }
.hint { color: #888; display: block; margin-top: 4px; }
.saved-msg { color: #28a745; font-weight: bold; margin-left: 10px; }

/* Buttons */
.btn {
    display: inline-block;
    background-color: #28a745;
    color: white;
    border: none;
    padding: 8px 15px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    text-decoration: none;
    font-size: 13px;
}
.btn:hover { background-color: #218838; }
.btn-primary { background-color: #007bff; }
.btn-primary:hover { background-color: #0069d9; }
.btn-secondary { background-color: #6c757d; }
.btn-secondary:hover { background-color: #5a6268; }
.btn-danger { background-color: #dc3545; }
.btn-danger:hover { background-color: #c82333; }
.btn-warning { background-color: #ffc107; color: #333; }
.btn-warning:hover { background-color: #e0a800; }
.btn-info { background-color: #17a2b8; }
.btn-info:hover { background-color: #138496; }
.btn-sm { padding: 4px 8px; font-size: 12px; margin-right: 6px; }
.btn-block { width: 100%; margin-top: 10px; }
.actions-cell { white-space: nowrap; }

select { padding: 4px; margin-right: 5px; border: 1px solid #ccc; border-radius: 4px; }

/* Sparkline */
.sparkline { display: block; }
.sparkline-empty { color: #aaa; font-size: 12px; }

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}
/* [hidden] and .modal-overlay have equal specificity; without this the modal's
   own display:flex wins the cascade and the "hidden" attribute is ignored. */
.modal-overlay[hidden] { display: none; }
.modal {
    background: white;
    padding: 25px;
    border-radius: 8px;
    width: 380px;
    max-width: 90vw;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
.modal-actions { text-align: right; margin-top: 20px; }
.modal-actions .btn { margin-left: 8px; }

/* Login page */
.login-body {
    background-color: #f4f6f9;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}
.login-box {
    background: white;
    padding: 35px 30px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    width: 360px;
    max-width: 90vw;
    border: 1px solid #eaedf2;
}
.login-box h2 {
    text-align: center;
    color: #333;
    font-size: 22px;
    font-weight: bold;
    margin-bottom: 6px;
}
.login-subtitle {
    text-align: center;
    color: #666;
    margin: 0 0 22px;
    font-size: 13px;
}
.login-box label {
    color: #555;
    font-size: 13px;
    font-weight: bold;
    margin-bottom: 6px;
}
.login-box input[type=password] {
    background: #fff;
    border: 1px solid #ccc;
    color: #333;
    padding: 10px 12px;
    font-size: 14px;
    border-radius: 4px;
    width: 100%;
    margin-top: 4px;
    margin-bottom: 16px;
}
.login-box input[type=password]:focus {
    border-color: #007bff;
    outline: none;
    box-shadow: 0 0 0 2px rgba(0,123,255,0.25);
}
.login-box .btn-primary {
    background-color: #007bff;
    color: white;
    padding: 10px 15px;
    font-size: 14px;
    border-radius: 4px;
    font-weight: bold;
}
.login-box .btn-primary:hover {
    background-color: #0069d9;
}
.error-msg {
    color: #dc3545;
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    padding: 8px 12px;
    border-radius: 4px;
    margin-bottom: 16px;
    font-size: 13px;
    font-weight: bold;
    text-align: center;
}