body {
    margin: 0;
    font-family: Arial, sans-serif;
    color: #1f2933;
    background-color: #f5f7fa;
}

.navbar {
    background-color: #2c3e50;
    padding: 12px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.navbar-left,
.navbar-right {
    display: flex;
    align-items: center;
    gap: 18px;
}

.navbar a {
    color: #ffffff;
    text-decoration: none;
}

.navbar a:hover {
    text-decoration: underline;
}

.content {
    max-width: 900px;
    margin: 32px auto;
    padding: 0 20px;
}

h1 {
    margin-top: 0;
}

.calculator-layout {
    display: grid;
    grid-template-columns: minmax(320px, 420px) 1fr;
    gap: 28px;
    align-items: start;
}

.calculator-form {
    max-width: 420px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.calculator-form label {
    font-weight: 600;
    margin-top: 8px;
}

.calculator-form input {
    padding: 8px 10px;
    border: 1px solid #c6d0db;
    border-radius: 4px;
    font-size: 14px;
}

.calculator-form button {
    margin-top: 14px;
    width: fit-content;
    padding: 10px 14px;
    border: 0;
    border-radius: 4px;
    background-color: #2c3e50;
    color: #ffffff;
    cursor: pointer;
}

.calculator-form button:hover {
    background-color: #1f2d3a;
}

.calculator-result {
    margin-top: 20px;
    padding: 14px 16px;
    border-left: 6px solid #1f7a3f;
    border-radius: 6px;
    background-color: #eaf7ef;
    color: #0f5132;
    font-family: "Georgia", "Times New Roman", serif;
    font-size: 30px;
    font-weight: 700;
    line-height: 1.3;
}

.calculator-result-label {
    font-weight: 700;
}

.calculator-result-value {
    font-weight: 800;
    color: #0b7a30;
}

.calculator-description {
    padding: 16px 18px;
    border: 1px solid #d6e0ea;
    border-radius: 8px;
    background-color: #ffffff;
}

.calculator-description h2 {
    margin-top: 0;
    margin-bottom: 10px;
    font-size: 20px;
}

.calculator-description p {
    margin: 0;
    line-height: 1.6;
}

@media (max-width: 900px) {
    .calculator-layout {
        grid-template-columns: 1fr;
    }
}

.contact-hero {
    margin-bottom: 26px;
    padding: 22px 24px;
    border-radius: 12px;
    background: linear-gradient(135deg, #183a5a 0%, #2f5f85 55%, #3f8ab7 100%);
    color: #ffffff;
}

.contact-hero h1 {
    margin: 0;
    font-size: 48px;
    line-height: 1.1;
}

.contact-hero p {
    margin: 14px 0 0;
    max-width: 760px;
    font-size: 20px;
    line-height: 1.5;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.contact-card {
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-areas:
        "icon label"
        "icon value";
    gap: 4px 12px;
    padding: 18px 16px;
    border-radius: 12px;
    color: #102a43;
    text-decoration: none;
    background-color: #ffffff;
    box-shadow: 0 6px 18px rgba(16, 42, 67, 0.12);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.contact-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 22px rgba(16, 42, 67, 0.16);
}

.contact-icon {
    grid-area: icon;
    width: 46px;
    height: 46px;
    border-radius: 10px;
    display: grid;
    place-items: center;
}

.contact-icon svg {
    width: 26px;
    height: 26px;
    fill: currentColor;
}

.contact-label {
    grid-area: label;
    font-size: 26px;
    font-weight: 700;
    line-height: 1.2;
}

.contact-value {
    grid-area: value;
    font-size: 16px;
    line-height: 1.4;
}

.contact-card.facebook .contact-icon {
    background-color: #e8f0fe;
    color: #1877f2;
}

.contact-card.email .contact-icon {
    background-color: #fef3e8;
    color: #d9480f;
}

.contact-card.linkedin .contact-icon {
    background-color: #e8f4fb;
    color: #0a66c2;
}

.auth-section {
    max-width: 520px;
}

.auth-form {
    margin-top: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.auth-form label {
    font-weight: 600;
    margin-top: 10px;
}

.auth-form input {
    padding: 10px 12px;
    border: 1px solid #c6d0db;
    border-radius: 4px;
    font-size: 15px;
}

.auth-form button {
    margin-top: 14px;
    width: fit-content;
    padding: 10px 16px;
    border: 0;
    border-radius: 4px;
    background-color: #2c3e50;
    color: #ffffff;
    cursor: pointer;
}

.auth-form button:hover {
    background-color: #1f2d3a;
}

@media (max-width: 900px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .contact-hero h1 {
        font-size: 38px;
    }

    .contact-hero p {
        font-size: 18px;
    }

    .navbar {
        justify-content: flex-start;
    }
}