diff --git a/css/style.css b/css/style.css
new file mode 100644
index 0000000..733ecc8
--- /dev/null
+++ b/css/style.css
@@ -0,0 +1,365 @@
+:root {
+    color-scheme: dark;
+    --background: #0d0d1a;
+    --text: #f8fafc;
+    --muted: #c1c9d2;
+    --accent: #10b981;
+    --border: rgb(255 255 255 / 16%);
+    font-family: system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
+    color: var(--text);
+    background: var(--background);
+}
+
+*,
+*::before,
+*::after {
+    box-sizing: border-box;
+}
+
+body {
+    display: flex;
+    flex-direction: column;
+    min-height: 100vh;
+    min-height: 100svh;
+    margin: 0;
+    line-height: 1.6;
+}
+
+p,
+h1 {
+    margin: 0;
+}
+
+.container {
+    width: min(1680px, calc(100% - clamp(40px, 10vw, 192px)));
+    margin-inline: auto;
+}
+
+.site-header {
+    border-top: 3px solid var(--accent);
+}
+
+.brand {
+    display: flex;
+    align-items: center;
+    gap: 24px;
+    min-height: 88px;
+}
+
+.brand__name {
+    font-size: 30px;
+    font-weight: 750;
+    line-height: 1;
+    letter-spacing: -1.5px;
+}
+
+.brand__name span {
+    color: var(--accent);
+}
+
+.brand__label {
+    padding-left: 24px;
+    border-left: 1px solid var(--border);
+    color: var(--muted);
+    font-size: 13px;
+    letter-spacing: 0.025em;
+}
+
+main {
+    display: flex;
+    flex: 1;
+}
+
+.hero {
+    position: relative;
+    isolation: isolate;
+    display: flex;
+    flex: 1;
+    min-width: 0;
+    border-block: 1px solid var(--border);
+}
+
+.hero__image,
+.hero::after {
+    position: absolute;
+    z-index: -1;
+    inset: 0;
+    width: 100%;
+    height: 100%;
+}
+
+.hero__image {
+    object-fit: cover;
+    object-position: center 42%;
+}
+
+.hero::after {
+    background:
+        linear-gradient(0deg, rgb(13 13 26 / 96%), transparent 42%),
+        linear-gradient(90deg, rgb(13 13 26 / 94%) 0%, rgb(13 13 26 / 79%) 35%, rgb(13 13 26 / 38%) 72%, rgb(13 13 26 / 25%) 100%);
+    content: "";
+}
+
+.hero__inner {
+    display: flex;
+    flex-direction: column;
+    padding-block: clamp(32px, 5vh, 64px) 28px;
+}
+
+.hero__content {
+    width: min(100%, 1000px);
+    margin-block: auto;
+    padding-block: 24px 64px;
+}
+
+.hero__eyebrow {
+    display: flex;
+    align-items: center;
+    gap: 12px;
+    margin-bottom: 26px;
+    color: #64e5b7;
+    font-size: 11px;
+    font-weight: 650;
+    letter-spacing: 0.16em;
+    text-transform: uppercase;
+}
+
+.hero__eyebrow::before {
+    width: 28px;
+    height: 1px;
+    flex-shrink: 0;
+    background: currentColor;
+    content: "";
+}
+
+h1 {
+    max-width: 100%;
+    font-size: clamp(42px, 4.9vw, 88px);
+    font-weight: 550;
+    line-height: 1.1;
+    letter-spacing: -0.055em;
+    text-wrap: balance;
+    overflow-wrap: break-word;
+}
+
+h1 span {
+    display: block;
+    margin-top: 8px;
+    color: var(--accent);
+}
+
+.hero__description {
+    max-width: 65ch;
+    margin-top: 30px;
+    color: #d1d7df;
+    font-size: clamp(16px, 1.15vw, 19px);
+    line-height: 1.85;
+}
+
+.hero__details {
+    display: grid;
+    grid-template-columns: minmax(0, 1fr) 250px;
+    align-items: center;
+    gap: 48px;
+    padding-top: 28px;
+    border-top: 1px solid var(--border);
+}
+
+.benefits {
+    display: grid;
+    grid-template-columns: repeat(3, minmax(0, 1fr));
+    gap: 24px;
+    margin: 0;
+    padding: 0;
+    list-style: none;
+}
+
+.benefits li {
+    display: flex;
+    align-items: baseline;
+    gap: 14px;
+}
+
+.benefits__number {
+    color: #64e5b7;
+    font-size: 11px;
+    font-variant-numeric: tabular-nums;
+}
+
+.benefits p {
+    font-size: 14px;
+    font-weight: 500;
+}
+
+.benefits p span {
+    display: block;
+    margin-top: 4px;
+    color: var(--muted);
+    font-size: 12px;
+    font-weight: 400;
+}
+
+.hero__caption {
+    padding-left: 24px;
+    border-left: 1px solid var(--border);
+}
+
+.hero__caption-label {
+    color: var(--muted);
+    font-size: 10px;
+    letter-spacing: 0.12em;
+    text-transform: uppercase;
+}
+
+.hero__slogan {
+    margin-top: 8px;
+    font-size: 22px;
+    font-weight: 450;
+    line-height: 1.4;
+    letter-spacing: -0.025em;
+}
+
+.site-footer__inner {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    gap: 24px;
+    min-height: 88px;
+    padding-block: 24px;
+    font-size: 12px;
+}
+
+.site-footer__inner p > span {
+    margin-left: 12px;
+    color: var(--muted);
+}
+
+.site-footer__note {
+    display: flex;
+    align-items: center;
+    gap: 9px;
+    color: var(--muted);
+}
+
+.site-footer__note > span {
+    width: 5px;
+    height: 5px;
+    flex-shrink: 0;
+    border-radius: 50%;
+    background: var(--accent);
+}
+
+@media (max-width: 1100px) {
+    .hero__image {
+        object-position: 80% center;
+    }
+
+    .hero::after {
+        background:
+            linear-gradient(0deg, rgb(13 13 26 / 96%), transparent 42%),
+            linear-gradient(90deg, rgb(13 13 26 / 92%), rgb(13 13 26 / 70%) 65%, rgb(13 13 26 / 48%));
+    }
+
+    .hero__content {
+        max-width: 85%;
+    }
+
+    .hero__details {
+        grid-template-columns: minmax(0, 1fr) 200px;
+        gap: 28px;
+    }
+
+    .benefits li {
+        flex-direction: column;
+        gap: 8px;
+    }
+}
+
+@media (max-width: 700px) {
+    .brand {
+        min-height: 76px;
+        gap: 16px;
+    }
+
+    .brand__label {
+        padding-left: 16px;
+        font-size: 11px;
+    }
+
+    .hero__image {
+        object-position: 85% center;
+    }
+
+    .hero::after {
+        background: linear-gradient(90deg, rgb(13 13 26 / 87%), rgb(13 13 26 / 65%)),
+            linear-gradient(0deg, var(--background), transparent 55%);
+    }
+
+    .hero__content {
+        max-width: 100%;
+        padding-block: 12px 40px;
+    }
+
+    .hero__eyebrow {
+        gap: 8px;
+        font-size: 10px;
+        letter-spacing: 0.11em;
+    }
+
+    .hero__eyebrow::before {
+        width: 20px;
+    }
+
+    .hero__description {
+        margin-top: 24px;
+    }
+
+    .hero__details {
+        grid-template-columns: 1fr;
+        gap: 28px;
+        padding-top: 24px;
+    }
+
+    .benefits {
+        gap: 16px;
+    }
+
+    .benefits p {
+        font-size: 12px;
+    }
+
+    .hero__caption {
+        padding-left: 16px;
+        border-left-color: var(--accent);
+    }
+
+    .hero__slogan {
+        font-size: 20px;
+    }
+
+    .site-footer__inner {
+        align-items: flex-start;
+        flex-direction: column;
+        gap: 14px;
+    }
+
+    .site-footer__inner p > span {
+        margin-left: 0;
+    }
+
+    .site-footer__inner > p:first-child span {
+        display: block;
+        margin-top: 4px;
+    }
+}
+
+@media (max-width: 360px) {
+    .benefits {
+        grid-template-columns: 1fr;
+    }
+
+    .benefits li {
+        flex-direction: row;
+        gap: 14px;
+    }
+}
diff --git a/images/hero-triathlon.webp b/images/hero-triathlon.webp
new file mode 100644
index 0000000..239ac6d
Binary files /dev/null and b/images/hero-triathlon.webp differ
diff --git a/index.html b/index.html
index c8edbe7..79f200f 100644
--- a/index.html
+++ b/index.html
@@ -4,26 +4,70 @@
 <head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
-    <title>Ernährungsberater</title>
+    <title>Ernährungsberatung für Triathleten | tri-hub</title>
+    <link rel="stylesheet" href="css/style.css">
 </head>
 
 <body>
-    <!-- Leistungsübersicht Vincent-->
-    <section>
+    <header class="site-header">
+        <div class="container brand">
+            <span class="brand__name">tri-hub<span aria-hidden="true">.</span></span>
+            <span class="brand__label">Ernährungsberatung</span>
+        </div>
+    </header>
 
-    </section>
-    <!-- Berater & Qualifikationen Ahmad -->
-    <section>
+    <main>
+        <section class="hero" id="produktuebersicht" aria-labelledby="hero-title">
+            <img class="hero__image"
+                 src="images/hero-triathlon.webp"
+                 alt="Gruppe beim Radfahren und Laufen in einer Berglandschaft im Abendlicht"
+                 width="1920" height="1080" fetchpriority="high">
 
-    </section>
-    <!-- Info über Beratung Dennis-->
-    <section>
+            <div class="container hero__inner">
+                <div class="hero__content">
+                    <p class="hero__eyebrow">Der Text wärmt sich noch auf</p>
+                    <h1 id="hero-title">
+                        Überschrift. Weitere Zeile.
+                        <span>Akzentzeile.</span>
+                    </h1>
+                    <p class="hero__description">
+                        Hier folgt eine kurze Beschreibung der Ernährungsberatung.
+                        Dieser Platz ist für den finalen Text vorgesehen und wird ergänzt,
+                        sobald die Inhalte vorliegen.
+                    </p>
+                </div>
 
-    </section>
-    <!-- Produktsübersicht Shahnam -->
-    <section>
+                <div class="hero__details">
+                    <ul class="benefits" aria-label="Platzhalter für die Vorteile der Beratung">
+                        <li>
+                            <span class="benefits__number" aria-hidden="true">01</span>
+                            <p>Erster Vorteil <span>Text folgt</span></p>
+                        </li>
+                        <li>
+                            <span class="benefits__number" aria-hidden="true">02</span>
+                            <p>Zweiter Vorteil <span>Text folgt</span></p>
+                        </li>
+                        <li>
+                            <span class="benefits__number" aria-hidden="true">03</span>
+                            <p>Dritter Vorteil <span>Text folgt</span></p>
+                        </li>
+                    </ul>
 
-    </section>
+                    <div class="hero__caption">
+                        <p class="hero__caption-label">Bildunterschrift folgt</p>
+                        <p class="hero__slogan">Slogan folgt. Weitere Zeile.</p>
+                    </div>
+                </div>
+            </div>
+        </section>
+    </main>
+
+    <footer>
+        <div class="container site-footer__inner">
+            <p>Abschlusstext folgt. <span>Ergänzender Text folgt.</span></p>
+            <p class="site-footer__note"><span aria-hidden="true"></span>Kurzhinweis folgt.</p>
+        </div>
+    </footer>
 </body>
 
-</html>
\ No newline at end of file
+</html>
diff --git a/script.js b/script.js
deleted file mode 100644
index e69de29..0000000
diff --git a/style.css b/style.css
deleted file mode 100644
index e69de29..0000000