:root {
    --green-900: #1b4332;
    --green-700: #2d6a4f;
    --green-600: #40916c;
    --green-500: #52b788;
    --green-100: #d8f3dc;
    --cream: #f8faf8;
    --text: #1f2937;
    --muted: #6b7280;
    --white: #ffffff;
    --shadow: 0 10px 30px rgba(27, 67, 50, 0.12);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text);
    background: var(--cream);
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    width: min(1140px, calc(100% - 32px));
    margin: 0 auto;
}

.top-bar {
    background: var(--green-900);
    color: var(--white);
    font-size: 14px;
    padding: 10px 0;
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.top-bar a {
    color: var(--white);
}

.site-header {
    background: var(--white);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 14px 0;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand img {
    height: 52px;
    width: auto;
    object-fit: contain;
}

.brand-text strong {
    display: block;
    font-size: 20px;
    color: var(--green-900);
}

.brand-text span {
    font-size: 12px;
    color: var(--muted);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 24px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    font-weight: 600;
    color: var(--text);
}

.nav-links a.active,
.nav-links a:hover {
    color: var(--green-700);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 22px;
    border-radius: 999px;
    font-weight: 700;
    border: none;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn-primary {
    background: var(--green-700);
    color: var(--white);
    box-shadow: var(--shadow);
}

.btn-outline {
    background: transparent;
    color: var(--green-700);
    border: 2px solid var(--green-700);
}

.hero {
    padding: 72px 0;
    background: linear-gradient(135deg, #d8f3dc 0%, #ffffff 55%, #ecfdf5 100%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 32px;
    align-items: center;
}

.hero h1 {
    font-size: clamp(32px, 5vw, 48px);
    line-height: 1.15;
    margin: 0 0 16px;
    color: var(--green-900);
}

.hero p {
    font-size: 18px;
    color: var(--muted);
    margin-bottom: 24px;
}

.hero-card {
    background: var(--white);
    border-radius: 18px;
    padding: 24px;
    box-shadow: var(--shadow);
}

.section {
    padding: 64px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 36px;
}

.section-title h2 {
    margin: 0 0 8px;
    font-size: 32px;
    color: var(--green-900);
}

.section-title p {
    margin: 0;
    color: var(--muted);
}

.feature-grid,
.product-grid,
.info-grid {
    display: grid;
    gap: 24px;
}

.feature-grid {
    grid-template-columns: repeat(3, 1fr);
}

.product-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
}

.info-grid {
    grid-template-columns: 1fr 1fr;
}

.card {
    background: var(--white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.feature-card {
    padding: 28px;
}

.feature-card h3 {
    margin-top: 0;
    color: var(--green-700);
}

.product-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    background: var(--green-100);
}

.product-card .body {
    padding: 18px;
}

.product-card h3 {
    margin: 0 0 8px;
    font-size: 18px;
}

.price {
    font-size: 20px;
    font-weight: 700;
    color: var(--green-700);
}

.price del {
    color: var(--muted);
    font-size: 14px;
    font-weight: 500;
    margin-left: 8px;
}

.download-banner {
    background: linear-gradient(90deg, var(--green-900), var(--green-600));
    color: var(--white);
    border-radius: 20px;
    padding: 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
}

.contact-form label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #d1d5db;
    border-radius: 10px;
    margin-bottom: 16px;
    font: inherit;
}

.contact-form textarea {
    min-height: 140px;
    resize: vertical;
}

.alert {
    padding: 14px 16px;
    border-radius: 10px;
    margin-bottom: 20px;
}

.alert-success {
    background: #ecfdf5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.site-footer {
    background: var(--green-900);
    color: var(--white);
    padding: 40px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 24px;
    margin-bottom: 24px;
}

.site-footer a {
    color: #d8f3dc;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    padding-top: 16px;
    font-size: 14px;
    color: #b7e4c7;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: var(--green-900);
}

@media (max-width: 900px) {
    .hero-grid,
    .feature-grid,
    .info-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .menu-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 16px;
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-wrap {
        position: relative;
        flex-wrap: wrap;
    }
}