body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f7f9fb;
    color: #333;
}

header {
    background: #1a3d6f;
    padding: 10px 20px;
    color: white;
}

.header-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: bold;
    letter-spacing: 0.05em;
}

.logo-mark {
    width: 28px;
    height: 28px;
    border-radius: 4px;
    border: 2px solid #ffffff;
    position: relative;
}

.logo-mark::before {
    content: "";
    position: absolute;
    left: 4px;
    right: 4px;
    bottom: 4px;
    height: 2px;
    background: #ffffff;
}

.logo-mark::after {
    content: "";
    position: absolute;
    left: 6px;
    bottom: 4px;
    width: 14px;
    height: 2px;
    background: #ffffff;
    transform: rotate(25deg);
    transform-origin: left center;
}

nav {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
}

nav a:hover {
    text-decoration: underline;
}

.hero {
    padding: 70px 20px;
    text-align: center;
    background: #eef3f8;
}

.hero-inner {
    max-width: 900px;
    margin: 0 auto;
}

.hero img {
    max-width: 100%;
    border-radius: 8px;
    margin-top: 25px;
}

.hero h1 {
    font-size: 2.3rem;
    margin-bottom: 10px;
}

.hero p {
    font-size: 1.1rem;
    margin-bottom: 25px;
}

.btn {
    background: #1a3d6f;
    color: white;
    padding: 12px 24px;
    border-radius: 6px;
    text-decoration: none;
    display: inline-block;
    font-size: 0.95rem;
}

.btn:hover {
    background: #16345d;
}

.section {
    padding: 50px 20px;
    max-width: 900px;
    margin: auto;
}

.section img {
    max-width: 100%;
    border-radius: 8px;
    margin: 15px 0;
}

.section h1,
.section h2 {
    color: #1a3d6f;
}

ul {
    padding-left: 20px;
}

footer {
    text-align: center;
    padding: 20px;
    background: #1a3d6f;
    color: white;
    margin-top: 60px;
    font-size: 0.85rem;
}

/* Forms */
input, textarea, select {
    width: 100%;
    padding: 10px;
    margin-top: 4px;
    border-radius: 4px;
    border: 1px solid #ccc;
    box-sizing: border-box;
    font-family: inherit;
}

/* Calculator layout */
.calculator {
    background: #ffffff;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}

.calculator-row {
    margin-bottom: 15px;
}

.calculator-result {
    margin-top: 20px;
    font-weight: bold;
    color: #1a3d6f;
    background: #eef3f8;
    padding: 12px;
    border-radius: 6px;
    word-wrap: break-word;
}

.small-text {
    font-size: 0.8rem;
    color: #666;
    margin-top: 10px;
}