:root {
    --primary: #1E88E5;
    --primary-dark: #1565c0;
    --bg: #f5f7fb;
    --text: #1f2d3d;
    --muted: #5c6775;
    --card: #ffffff;
    --border: #e3e7ef;
    --shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
.container {
    width: min(1100px, 92vw);
    margin: 0 auto;
}
.site-header {
    background: var(--card);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 10;
}
.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 0;
}
.logo {
    font-weight: 800;
    letter-spacing: -0.02em;
    font-size: 1.2rem;
    color: var(--primary);
}
.main-nav ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 14px;
}
.main-nav a {
    padding: 8px 12px;
    border-radius: 10px;
    color: var(--text);
    transition: background 0.2s ease, color 0.2s ease;
}
.main-nav a:hover { background: rgba(30, 136, 229, 0.1); color: var(--primary-dark); }
.menu-toggle {
    display: none;
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 10px 12px;
    border-radius: 10px;
    font-size: 1rem;
    cursor: pointer;
}
.page {
    padding: 28px 0 60px;
}
.hero {
    background: linear-gradient(135deg, rgba(30,136,229,0.1), rgba(21,101,192,0.15));
    padding: 40px 0;
    border-radius: 18px;
    margin-bottom: 28px;
    box-shadow: var(--shadow);
    text-align: center;
}
.hero h1 { margin: 0 0 4px; font-size: 2rem; line-height: 1.2; }
.hero p { max-width: 720px; color: var(--muted); margin: 0 auto 6px; }
.hero .flex { justify-content: center; }
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
}
.card {
    background: var(--card);
    padding: 18px;
    border-radius: 14px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.card h3 { margin: 0; }
.card p { margin: 0; color: var(--muted); }
.card .pill { align-self: flex-start; padding: 4px 10px; border-radius: 20px; background: rgba(30,136,229,0.12); color: var(--primary-dark); font-size: 0.85rem; }
main section { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 20px; box-shadow: var(--shadow); margin-bottom: 18px; }
form { display: grid; gap: 12px; }
form.calculator-form {
    background: linear-gradient(180deg, rgba(30,136,229,0.04), rgba(30,136,229,0.01));
    border: 1px solid rgba(30,136,229,0.18);
    border-radius: 14px;
    padding: 16px;
}
form.calculator-form > div,
.field-group {
    display: grid;
    gap: 6px;
}
label { font-weight: 600; }
input, select, textarea {
    width: 100%;
    padding: 10px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: #fff;
    font-size: 1rem;
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: rgba(30,136,229,0.55);
    box-shadow: 0 0 0 3px rgba(30,136,229,0.14);
}
.field-hint {
    color: var(--muted);
    font-size: 0.88rem;
}
.is-hidden { display: none !important; }
button, .btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 700;
    transition: transform 0.1s ease, box-shadow 0.2s ease, background 0.2s ease;
}
button:hover, .btn:hover { background: var(--primary-dark); box-shadow: var(--shadow); }
button:active, .btn:active { transform: translateY(1px); }
table { width: 100%; border-collapse: collapse; margin-top: 10px; }
th, td { padding: 10px; border: 1px solid var(--border); text-align: left; }
th { background: rgba(30,136,229,0.08); }
.notice { padding: 12px; border-radius: 10px; background: rgba(30,136,229,0.08); color: var(--primary-dark); }
.site-footer { background: #0f1623; color: #f4f6fb; padding: 32px 0 12px; margin-top: 40px; }
.site-footer a { color: #d5e6ff; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px,1fr)); gap: 18px; }
.footer-grid h4 { margin-bottom: 8px; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.footer-banner { margin: 18px 0; text-align: center; }
.footer-cta { display: inline-block; background: #1E88E5; color: #fff; padding: 10px 16px; border-radius: 10px; }
.footer-bottom { text-align: center; border-top: 1px solid rgba(255,255,255,0.08); padding-top: 10px; color: #9fb3d8; }
.affiliate-block { background: linear-gradient(135deg, rgba(30,136,229,0.12), rgba(21,101,192,0.1)); border: 1px solid var(--border); border-radius: 14px; padding: 16px; box-shadow: var(--shadow); }
.affiliate-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px,1fr)); gap: 10px; margin-top: 10px; }
.affiliate-card { display: block; background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 12px; color: var(--text); box-shadow: var(--shadow); }
.ad-slot { border: 1px dashed var(--border); padding: 10px; text-align: center; color: var(--muted); border-radius: 10px; background: #fff; }
.flex { display: flex; gap: 10px; flex-wrap: wrap; }
.badge { padding: 4px 10px; background: rgba(30,136,229,0.12); color: var(--primary-dark); border-radius: 14px; }
.summary-box { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px,1fr)); gap: 10px; margin-top: 12px; }
.summary-item { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 12px; box-shadow: var(--shadow); }
.result-panel {
    margin-top: 12px;
    display: grid;
    gap: 12px;
}
.result-highlight {
    background: linear-gradient(135deg, rgba(30,136,229,0.12), rgba(21,101,192,0.2));
    border: 1px solid rgba(30,136,229,0.22);
    border-radius: 12px;
    padding: 14px;
}
.result-highlight h3 {
    margin: 0;
    font-size: 0.95rem;
    color: var(--primary-dark);
}
.result-highlight p {
    margin: 6px 0 0;
    font-size: 1.45rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}
.result-table th {
    background: rgba(30,136,229,0.12);
}
.result-table td:last-child,
.result-table th:last-child {
    text-align: right;
    white-space: nowrap;
}
.notice.notice-error {
    background: rgba(211, 47, 47, 0.1);
    color: #8e1111;
}
@media (max-width: 960px) {
    .main-nav { display: none; position: absolute; top: 62px; left: 0; right: 0; background: #fff; box-shadow: var(--shadow); padding: 14px 0; }
    .main-nav.open { display: block; }
    .main-nav ul { flex-direction: column; gap: 8px; padding: 0 18px; }
    .menu-toggle { display: inline-flex; }
}
@media (max-width: 600px) {
    .hero h1 { font-size: 1.5rem; }
    .header-content { padding: 10px 0; }
}