:root {
    --nav-accent: #851762;
    --card-bg: #ffffff;
    --nav-bg: #176d85;
    --text: #0c272e;
    --muted: #5b6b7b;
    --shadow: 0 4px 20px rgba(30, 58, 95, 0.12);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", Calibri, Arial, Helvetica, sans-serif;
    background: linear-gradient(160deg, #e8f1fb 0%, #f0f4f8 100%);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header.site-header {
    background: var(--nav-bg);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 10;
}

.header-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0.9rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: #fff;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.3px;
}

.brand .logo {
    line-height: 1;
}

nav.main-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

nav.main-nav a {
    color: #d5e4f5;
    text-decoration: none;
    padding: 0.5rem 0.9rem;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: background 0.2s ease, color 0.2s ease;
}

nav.main-nav a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

nav.main-nav a.active {
    background: var(--nav-accent);
    color: #fff;
}

main {
    flex: 1;
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.page-title {
    text-align: center;
    margin: 0 0 1.5rem;
}

.page-title h1 {
    margin: 0;
    font-size: 1.8rem;
    color: var(--nav-bg);
}

.page-title p {
    margin: 0.4rem 0 0;
    color: var(--muted);
    font-size: 1rem;
}

.data-card {
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: var(--shadow);
    padding: 0.5rem;
    overflow: hidden;
}

iframe.data-frame {
    width: 100%;
    min-height: 780px;
    border: none;
    display: block;
    border-radius: 12px;
}

.charts {
    display: flex;
    flex-direction: column;
}

.chart-card {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 1rem;
    text-align: center;
}

.chart-card img {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 0 auto;
}

.chart-sep {
    border: none;
    border-top: 1px solid #e3e9ef;
    margin: 1.5rem 0;
    width: 100%;
}

footer.site-footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--muted);
    font-size: 0.85rem;
}

@media (max-width: 640px) {
    .header-inner {
        flex-direction: column;
        align-items: flex-start;
    }
    nav.main-nav {
        width: 100%;
    }
}