/* =========================
   PERUSASETUKSET
   ========================= */

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: #263238;
    background: #f7f9f9;
    line-height: 1.7;
}

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

a {
    color: #176b73;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}


/* =========================
   NAVIGOINTI
   ========================= */

header {
    background: #ffffff;
    border-bottom: 1px solid #e4e9e9;
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar {
    max-width: 1180px;
    margin: 0 auto;
    padding: 18px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 21px;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: #173f43;
}

.nav-links {
    display: flex;
    gap: 30px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: #405154;
    font-size: 15px;
    font-weight: 600;
}

.nav-links a:hover {
    color: #176b73;
    text-decoration: none;
}


/* =========================
   HERO
   ========================= */

.hero {
    background: linear-gradient(135deg, #eaf3f3, #f8fbfb);
    padding: 90px 25px;
}

.hero-inner {
    max-width: 1180px;
    margin: 0 auto;
}

.hero h1 {
    max-width: 800px;
    margin: 0 0 20px;
    color: #173f43;
    font-size: clamp(38px, 6vw, 68px);
    line-height: 1.08;
    font-weight: 600;
}

.hero p {
    max-width: 700px;
    margin: 0;
    font-size: 19px;
    color: #526467;
}


/* =========================
   SISÄLTÖ
   ========================= */

.container {
    max-width: 1050px;
    margin: 0 auto;
    padding: 70px 25px;
}

.section {
    margin-bottom: 90px;
}

.section h2 {
    color: #173f43;
    font-size: 34px;
    line-height: 1.2;
    margin-bottom: 25px;
    font-weight: 600;
}

.section h3 {
    color: #176b73;
    font-size: 24px;
    margin-top: 50px;
}

.section p {
    font-size: 17px;
    color: #4b5b5e;
}


/* =========================
   KUVAPAIKAT
   ========================= */

.image-placeholder {
    margin: 35px 0;
    min-height: 300px;
    border: 2px dashed #b8c8c9;
    border-radius: 12px;
    background: #eef3f3;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #718284;
    text-align: center;
    padding: 30px;
}

.image-placeholder img {
    width: 100%;
    border-radius: 10px;
}

.image-caption {
    margin-top: 10px;
    font-size: 14px;
    color: #758486;
}


/* =========================
   TUOTEKORTTI
   ========================= */

.product {
    background: #ffffff;
    border-radius: 16px;
    padding: 45px;
    margin-bottom: 55px;
    box-shadow: 0 8px 35px rgba(28, 55, 58, 0.07);
}

.product h2 {
    margin-top: 0;
}


/* =========================
   VIDEO
   ========================= */

.video-wrapper {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: 12px;
    margin: 35px 0;
    background: #111;
}

.video-wrapper iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}


/* =========================
   TUOTETIEDOT
   ========================= */

.info-box {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.info-item {
    background: #eef4f4;
    border-radius: 10px;
    padding: 22px 25px;
}

.info-item strong {
    display: block;
    color: #173f43;
    margin-bottom: 4px;
}


/* =========================
   YHTEYSTIEDOT
   ========================= */

.contact-box {
    background: #ffffff;
    padding: 45px;
    border-radius: 16px;
    box-shadow: 0 8px 35px rgba(28, 55, 58, 0.07);
    max-width: 700px;
}

.contact-box p {
    margin: 8px 0;
}


/* =========================
   FOOTER
   ========================= */

footer {
    background: #173f43;
    color: #dbe6e6;
    padding: 35px 25px;
    margin-top: 40px;
}

.footer-inner {
    max-width: 1050px;
    margin: 0 auto;
}

footer p {
    margin: 4px 0;
    font-size: 14px;
}


/* =========================
   MOBIILI
   ========================= */

@media (max-width: 700px) {

    .navbar {
        flex-direction: column;
        gap: 14px;
        padding: 15px 20px;
    }

    .nav-links {
        gap: 18px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav-links a {
        font-size: 14px;
    }

    .hero {
        padding: 65px 20px;
    }

    .hero h1 {
        font-size: 42px;
    }

    .hero p {
        font-size: 17px;
    }

    .container {
        padding: 50px 20px;
    }

    .section {
        margin-bottom: 65px;
    }

    .section h2 {
        font-size: 29px;
    }

    .section p {
        font-size: 16px;
    }

    .product {
        padding: 25px;
        border-radius: 12px;
    }

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

    .contact-box {
        padding: 30px 25px;
    }

    .image-placeholder {
        min-height: 220px;
    }
}