html, body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    color: #222;
    background: #f7f8fa;
}

.layout {
    display: flex;
    min-height: 100vh;
}

.nav-menu {
    width: 220px;
    background: #1f2937;
    color: #e5e7eb;
    padding: 24px 16px;
    box-sizing: border-box;
    flex-shrink: 0;
}

.nav-menu .brand a {
    color: #fff;
    font-size: 1.2em;
    font-weight: bold;
    text-decoration: none;
}

.nav-menu ul {
    list-style: none;
    padding: 0;
    margin: 24px 0 0;
}

.nav-menu li { margin: 4px 0; }

.nav-menu a {
    display: block;
    padding: 8px 12px;
    color: #d1d5db;
    text-decoration: none;
    border-radius: 6px;
}

.nav-menu a:hover {
    background: #374151;
    color: #fff;
}

.nav-menu a.active {
    background: #2563eb;
    color: #fff;
}

.content {
    flex: 1;
    padding: 32px 40px;
    max-width: 1100px;
}

h1 { margin-top: 0; }
h2 { margin-top: 32px; }

.subtitle { color: #6b7280; margin-top: -8px; font-size: 1.1em; }

.stat-row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin: 16px 0 24px;
}

.stat {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 16px 24px;
    min-width: 140px;
}

.stat-label { color: #6b7280; font-size: 0.85em; }
.stat-value { font-size: 1.6em; font-weight: bold; margin-top: 4px; }

.table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    overflow: hidden;
}

.table th, .table td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid #f1f5f9;
}

.table th {
    background: #f9fafb;
    font-weight: 600;
    font-size: 0.9em;
    color: #374151;
}

.table tr:last-child td { border-bottom: none; }

.btn {
    display: inline-block;
    padding: 8px 16px;
    background: #fff;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    color: #111827;
    text-decoration: none;
    cursor: pointer;
    font-size: 0.95em;
}

.btn:hover { background: #f3f4f6; }

.btn.primary {
    background: #2563eb;
    border-color: #2563eb;
    color: #fff;
}

.btn.primary:hover { background: #1d4ed8; }

.btn.small { padding: 4px 10px; font-size: 0.85em; }

.form-row {
    margin: 12px 0;
    max-width: 480px;
}

.form-row label {
    display: block;
    font-size: 0.9em;
    font-weight: 600;
    margin-bottom: 4px;
}

.form-row input,
.form-row textarea,
.form-row select {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    box-sizing: border-box;
    font-family: inherit;
    font-size: 1em;
}

.form-row small {
    display: block;
    color: #6b7280;
    font-size: 0.8em;
    margin-top: 2px;
}

.error { color: #b91c1c; }

.token-box {
    background: #fef3c7;
    border: 1px solid #fcd34d;
    border-radius: 8px;
    padding: 16px;
    margin: 16px 0;
}

.token-box pre {
    background: #fff;
    padding: 12px;
    border-radius: 6px;
    overflow-x: auto;
    font-size: 1em;
    margin: 8px 0;
}

.token-box .hint { color: #78350f; font-size: 0.9em; }

code {
    background: #f1f5f9;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.92em;
}

h1:focus { outline: none; }

.valid.modified:not([type=checkbox]) {
    outline: 1px solid #26b050;
}

.invalid { outline: 1px solid #e50000; }

.validation-message { color: #e50000; }

.range-buttons {
    display: flex;
    gap: 8px;
    margin: 12px 0;
}

.series-toggles {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 8px 0 16px;
}

.toggle-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
    padding: 8px 14px;
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
}

.toggle-label {
    font-weight: 600;
    color: #6b7280;
    font-size: 0.8em;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: 0.95em;
    user-select: none;
}

.toggle input {
    margin: 0;
    cursor: pointer;
}

.toggle:hover {
    color: #2563eb;
}

.chart-wrap {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 16px;
    height: 380px;
    position: relative;
    margin-bottom: 24px;
}

.nav-menu {
    display: flex;
    flex-direction: column;
}

.logout-form {
    margin-top: auto;
    padding-top: 16px;
}

.logout-btn {
    width: 100%;
    padding: 8px 12px;
    background: transparent;
    color: #d1d5db;
    border: 1px solid #374151;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9em;
}

.logout-btn:hover {
    background: #374151;
    color: #fff;
}

.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f7f8fa;
    padding: 16px;
}

.login-card {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 32px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.login-card h1 {
    margin: 0 0 4px;
    font-size: 1.5em;
}

.login-card .subtitle {
    margin: 0 0 24px;
    color: #6b7280;
}

.error-banner {
    background: #fee2e2;
    border: 1px solid #fca5a5;
    color: #991b1b;
    padding: 10px 14px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 0.9em;
}