:root {
    --primary: #128c7e;
    --primary-dark: #075e54;
    --primary-light: #dcf8c6;
    --accent: #25d366;
    --background: #f7f9f8;
    --surface: #ffffff;
    --text: #172b26;
    --text-muted: #60736d;
    --border: #dce5e1;
    --danger: #b42318;
    --warning-bg: #fff8e6;
    --warning-border: #f5c451;
    --radius: 14px;
    --shadow: 0 8px 30px rgba(7, 94, 84, 0.08);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--background);
    color: var(--text);
    font-family: Tahoma, Arial, sans-serif;
    line-height: 1.8;
}

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

button,
input,
textarea,
select {
    font: inherit;
}

.container {
    width: min(1120px, calc(100% - 32px));
    margin-inline: auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(12px);
}

.header-content {
    min-height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--primary-dark);
}

.logo-mark {
    display: grid;
    width: 38px;
    height: 38px;
    place-items: center;
    border-radius: 50%;
    background: var(--accent);
    color: #063d32;
    font-weight: 900;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 22px;
}

.main-nav a {
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 700;
}

.main-nav a:hover,
.main-nav a:focus-visible {
    color: var(--primary);
}

.menu-button {
    display: none;
    border: 1px solid var(--border);
    background: var(--surface);
    border-radius: 10px;
    padding: 8px 12px;
    cursor: pointer;
}

.hero {
    padding: 80px 0 60px;
    background:
        radial-gradient(circle at 80% 20%, rgba(37, 211, 102, 0.16), transparent 28%),
        radial-gradient(circle at 10% 80%, rgba(18, 140, 126, 0.12), transparent 25%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1.25fr 0.75fr;
    align-items: center;
    gap: 48px;
}

.eyebrow {
    display: inline-block;
    margin-bottom: 12px;
    padding: 5px 12px;
    border-radius: 999px;
    background: var(--primary-light);
    color: var(--primary-dark);
    font-size: 0.86rem;
    font-weight: 800;
}

.hero h1 {
    margin: 0;
    max-width: 720px;
    font-size: clamp(2rem, 5vw, 4rem);
    line-height: 1.25;
}

.hero p {
    max-width: 680px;
    margin: 20px 0 28px;
    color: var(--text-muted);
    font-size: 1.1rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.button {
    display: inline-flex;
    min-height: 46px;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: 0;
    border-radius: 11px;
    cursor: pointer;
    font-weight: 800;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

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

.button-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 8px 20px rgba(18, 140, 126, 0.22);
}

.button-secondary {
    background: var(--surface);
    color: var(--primary-dark);
    border: 1px solid var(--border);
}

.hero-card {
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: 22px;
    background: var(--surface);
    box-shadow: var(--shadow);
}

.mock-chat {
    display: grid;
    gap: 14px;
}

.chat-bubble {
    width: fit-content;
    max-width: 90%;
    padding: 12px 15px;
    border-radius: 14px;
    font-size: 0.92rem;
}

.chat-bubble.received {
    background: #f0f2f1;
}

.chat-bubble.sent {
    margin-right: auto;
    background: var(--primary-light);
}

.section {
    padding: 64px 0;
}

.section-heading {
    max-width: 700px;
    margin-bottom: 32px;
}

.section-heading h2 {
    margin: 0 0 10px;
    font-size: clamp(1.6rem, 3vw, 2.4rem);
}

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

.tools-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.tool-card {
    display: flex;
    min-height: 230px;
    flex-direction: column;
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: 0 4px 18px rgba(7, 94, 84, 0.04);
    transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.tool-icon {
    display: grid;
    width: 48px;
    height: 48px;
    margin-bottom: 18px;
    place-items: center;
    border-radius: 13px;
    background: var(--primary-light);
    font-size: 1.35rem;
}

.tool-card h3 {
    margin: 0 0 8px;
}

.tool-card p {
    margin: 0 0 20px;
    color: var(--text-muted);
}

.tool-link {
    margin-top: auto;
    color: var(--primary);
    font-weight: 800;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.info-card {
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
}

.info-card h3 {
    margin-top: 0;
}

.info-card p {
    margin-bottom: 0;
    color: var(--text-muted);
}

.notice {
    padding: 18px 20px;
    border: 1px solid var(--warning-border);
    border-radius: var(--radius);
    background: var(--warning-bg);
}

.site-footer {
    margin-top: 60px;
    padding: 40px 0 24px;
    border-top: 1px solid var(--border);
    background: var(--surface);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 30px;
}

.footer-links {
    display: grid;
    gap: 8px;
}

.footer-links a {
    color: var(--text-muted);
}

.footer-links a:hover {
    color: var(--primary);
}

.copyright {
    margin-top: 30px;
    padding-top: 18px;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.9rem;
    text-align: center;
}

@media (max-width: 850px) {
    .hero-content,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .tools-grid,
    .info-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .main-nav {
        position: absolute;
        top: 70px;
        right: 16px;
        left: 16px;
        display: none;
        padding: 18px;
        border: 1px solid var(--border);
        border-radius: var(--radius);
        background: var(--surface);
        box-shadow: var(--shadow);
        flex-direction: column;
        align-items: stretch;
    }

    .main-nav.is-open {
        display: flex;
    }

    .menu-button {
        display: inline-flex;
    }
}

@media (max-width: 560px) {
    .container {
        width: min(100% - 22px, 1120px);
    }

    .hero {
        padding-top: 48px;
    }

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

    .hero-actions {
        display: grid;
    }

    .button {
        width: 100%;
    }
}