Fix SUNDAY navigation stacking across sections

templates/landing-pages/sunday/site/index.html

@@ -1,5 +1,5 @@
 <!doctype html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width,initial-scale=1"><meta name="theme-color" content="#f5f2ed"><meta name="description" content="SUNDAY Motor Atelier. Explore the Porsche 911 in three dimensions, discover the details, and begin your next automotive chapter."><title>SUNDAY — For the love of the drive</title><link rel="icon" type="image/svg+xml" href="./brand-icon.svg"><link rel="icon" type="image/x-icon" sizes="32x32" href="./favicon.ico"><link rel="apple-touch-icon" sizes="180x180" href="./apple-touch-icon.png"><link rel="manifest" href="./site.webmanifest"><link rel="stylesheet" href="./fonts.css"><link rel="stylesheet" href="./styles.css"><link rel="stylesheet" href="./showroom.css"><link rel="stylesheet" href="./editorial.css"><script src="./app.js" defer></script><script type="module" src="./showroom.js"></script></head>
-<body><a class="skip" href="#main">Skip to content</a><main id="main"><section class="restoration-journey" id="return" aria-labelledby="hero-title"><div class="showroom" id="showroom"><header class="nav"><a class="brand" href="#" aria-label="Sunday home">Sunday<span>MOTOR ATELIER</span></a><nav aria-label="Main navigation"><a href="#return">The return</a><a href="#craft">The details</a><a href="#approach">Our approach</a></nav><button class="nav-button" data-open-brief>Your next chapter <span aria-hidden="true">↗</span></button></header><div class="ceiling-lines" aria-hidden="true"><i></i><i></i><i></i></div><div class="hero-heading" id="hero-heading"><p class="eyebrow">FOR THE LOVE OF THE DRIVE.</p><h1 id="hero-title">An icon.<br><em>For life.</em></h1><p>The Porsche 911. Reimagined in claret.<br>For the roads you take just because.</p></div><div class="return-heading" id="return-heading" aria-hidden="true"><p class="eyebrow">A CLOSER LOOK AT AN ICON.</p><h2>Every angle.<br><em>More to love.</em></h2></div><div class="side-note left-note"><span class="note-number">01</span><p>A familiar silhouette.<br>An enduring obsession.</p></div><div class="side-note right-note"><span class="note-number">02</span><p>Look closer.<br>Stay a little longer.</p></div>
+<body><a class="skip" href="#main">Skip to content</a><header class="nav"><a class="brand" href="#" aria-label="Sunday home">Sunday<span>MOTOR ATELIER</span></a><nav aria-label="Main navigation"><a href="#return">The return</a><a href="#craft">The details</a><a href="#approach">Our approach</a></nav><button class="nav-button" data-open-brief>Your next chapter <span aria-hidden="true">↗</span></button></header><main id="main"><section class="restoration-journey" id="return" aria-labelledby="hero-title"><div class="showroom" id="showroom"><div class="ceiling-lines" aria-hidden="true"><i></i><i></i><i></i></div><div class="hero-heading" id="hero-heading"><p class="eyebrow">FOR THE LOVE OF THE DRIVE.</p><h1 id="hero-title">An icon.<br><em>For life.</em></h1><p>The Porsche 911. Reimagined in claret.<br>For the roads you take just because.</p></div><div class="return-heading" id="return-heading" aria-hidden="true"><p class="eyebrow">A CLOSER LOOK AT AN ICON.</p><h2>Every angle.<br><em>More to love.</em></h2></div><div class="side-note left-note"><span class="note-number">01</span><p>A familiar silhouette.<br>An enduring obsession.</p></div><div class="side-note right-note"><span class="note-number">02</span><p>Look closer.<br>Stay a little longer.</p></div>
 <div class="car-stage" id="car-stage"><canvas id="car-canvas" tabindex="0" aria-label="Interactive Porsche 911 Carrera 4S. Use the left and right arrow keys to rotate, or activate Explore in 360 degrees and drag."></canvas><div class="model-loading"><span class="loading-line"></span><p>BRINGING AN ICON TO LIFE</p></div></div><div class="car-caption"><span>PORSCHE</span><strong>911 <em>Carrera 4S</em></strong><p id="model-status" role="status">Preparing the 911…</p></div><div class="paint-picker" role="group" aria-label="Paint finish"><span id="paint-name">Claret</span><button data-car-control disabled data-paint="#711429" aria-label="Claret" aria-pressed="true" style="--swatch:#711429"></button><button data-car-control disabled data-paint="#b9b8b0" aria-label="Silver" aria-pressed="false" style="--swatch:#b9b8b0"></button><button data-car-control disabled data-paint="#161719" aria-label="Carbon" aria-pressed="false" style="--swatch:#161719"></button></div>
 <div class="showroom-bottom"><span class="showroom-index">SUNDAY MOTOR ATELIER</span><a class="scroll-label" href="#craft">SCROLL TO DISCOVER <span aria-hidden="true">↓</span></a><button class="motion-button" id="motion-toggle" aria-pressed="false">Pause ambient Ⅱ</button></div><div class="vehicle-controls"><div class="opening-control"><button data-car-control disabled id="closed-button" aria-pressed="true">Closed</button><input data-car-control disabled id="open-range" type="range" min="0" max="100" value="0" aria-label="Doors and bonnet opening" aria-valuetext="Closed"><button data-car-control disabled id="opened-button" aria-pressed="false">Open</button></div><button data-car-control disabled id="inspect-button" aria-pressed="false">Explore in 360° ↗</button></div><div class="camera-views" role="group" aria-label="Camera angle"><button data-car-control disabled data-view="-.72" aria-pressed="true">Front ¾</button><button data-car-control disabled data-view="-1.57" aria-pressed="false">Profile</button><button data-car-control disabled data-view="-2.55" aria-pressed="false">Rear ¾</button></div><p id="orbit-hint">Scroll for a closer look</p></div></section>
 <section class="details-section" id="craft" aria-labelledby="craft-title">