<!DOCTYPE html>
<html>
<head>
<title>Timeline Template</title>
</head>
<body>

<header class="topbar">
    <div class="brand">CHRONICLE<span>®</span></div>
    <div class="top-center">AN INTERACTIVE HISTORY OF INNOVATION</div>
    <div class="issue">VOL. 001 — 2026</div>
  </header>

<section class="intro">
    <div class="eyebrow">
      <span class="small-dot"></span>
      A JOURNEY THROUGH TIME
    </div>

<h1>Moments that<br><em>changed everything.</em></h1>

<div class="intro-bottom">
      <p>From the first powered flight to the digital revolution. Explore the breakthroughs that transformed our world.</p>
      <span class="explore">EXPLORE THE TIMELINE ↓</span>
    </div>
  </section>

<div class="section-heading">
      <span>01 / THE TIMELINE</span>
      <span>1903 — 2007</span>
    </div>

<button class="time-point active" data-index="0">
        <span class="point"></span>
        <strong>1903</strong>
        <small>AVIATION</small>
      </button>

<button class="time-point" data-index="1">
        <span class="point"></span>
        <strong>1928</strong>
        <small>MEDICINE</small>
      </button>

<button class="time-point" data-index="2">
        <span class="point"></span>
        <strong>1969</strong>
        <small>SPACE</small>
      </button>

<button class="time-point" data-index="3">
        <span class="point"></span>
        <strong>1989</strong>
        <small>INTERNET</small>
      </button>

<button class="time-point" data-index="4">
        <span class="point"></span>
        <strong>2007</strong>
        <small>MOBILE</small>
      </button>
    </div>

<div class="story" id="story">
      <div class="story-copy">
        <div class="story-index">
          <span id="storyNumber">01 / 05</span>
          <span id="storyCategory">AVIATION</span>
        </div>

<h2 id="storyTitle">The world<br>takes flight.</h2>

<p id="storyDescription">
          On December 17, 1903, the Wright brothers achieved the first sustained, controlled flight of a powered, heavier-than-air aircraft, changing transportation forever.
        </p>

<div class="story-controls">
          <button id="prevBtn" aria-label="Previous event">←</button>
          <button id="nextBtn" aria-label="Next event">→</button>
          <span>USE ARROWS TO EXPLORE</span>
        </div>
      </div>

<div class="story-visual">
        <div class="image-frame">
          <img id="storyImage"
            src="https://upload.wikimedia.org/wikipedia/commons/8/86/First_flight2.jpg"
            alt="Wright brothers' first powered flight">
        </div>
        <div class="image-caption">
          <span id="imageCaption">THE WRIGHT FLYER / 1903</span>
          <span>ARCHIVE / 001</span>
        </div>
        <div class="visual-decoration">C.</div>
      </div>
    </div>

<div class="bottom-progress">
      <span>BEGINNING</span>
      <div class="progress-line">
        <div id="bottomProgressFill"></div>
      </div>
      <span>PRESENT</span>
    </div>

</section>

<footer>
    <span>CHRONICLE — AN EXPERIMENT IN INTERACTIVE STORYTELLING</span>
    <span>BUILT WITH HTML / CSS / JS</span>
  </footer>

</div>

</body>
</html>

:root {
  --bg: #f4f1e9;
  --ink: #263d35;
  --accent: #c46f51;
  --muted: #849088;
  --line: #d4d8cf;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "DM Sans", sans-serif;
}

button {
  font: inherit;
}

.chronicle {
  max-width: 1600px;
  margin: auto;
  padding: 0 5vw;
  overflow: hidden;
}

/* NAV */

.topbar {
  height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.brand {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -1px;
}

.brand span {
  font-size: 8px;
  vertical-align: top;
  margin-left: 3px;
}

.top-center,
.issue,
.eyebrow,
.explore,
.section-heading,
.story-index,
.image-caption,
.bottom-progress,
footer {
  font-family: "DM Mono", monospace;
  font-size: 9px;
  letter-spacing: 1px;
}

.top-center,
.issue {
  color: var(--muted);
}

/* INTRO */

.intro {
  padding: 85px 0 95px;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--accent);
}

.small-dot {
  width: 7px;
  height: 7px;
  background: var(--accent);
  border-radius: 50%;
}

.intro h1 {
  font-family: "Playfair Display", serif;
  font-weight: 400;
  font-size: clamp(54px, 7.6vw, 115px);
  line-height: 1.06;
  letter-spacing: -.055em;
  margin: 25px 0 45px;
}

.intro h1 em {
  font-weight: 400;
  color: var(--accent);
}

.intro-bottom {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 30px;
}

.intro-bottom p {
  max-width: 440px;
  font-size: 14px;
  line-height: 1.8;
  color: #66776e;
  margin: 0;
}

.explore {
  color: var(--accent);
}

/* TIMELINE */

.timeline-section {
  border-top: 1px solid var(--line);
  padding-top: 25px;
}

.section-heading {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
}

.timeline-nav {
  position: relative;
  display: flex;
  justify-content: space-between;
  margin: 65px 0 90px;
}

.timeline-track,
.timeline-progress {
  position: absolute;
  top: 9px;
  left: 10%;
  width: 80%;
  height: 2px;
  background: var(--line);
}

.timeline-progress {
  width: 0;
  background: var(--accent);
  transition: width .65s cubic-bezier(.2,.8,.2,1);
}

.time-point {
  position: relative;
  z-index: 2;
  width: 20%;
  background: none;
  border: 0;
  padding: 0;
  color: var(--muted);
  cursor: pointer;
  text-align: center;
}

.point {
  display: block;
  width: 20px;
  height: 20px;
  margin: 0 auto 16px;
  background: var(--bg);
  border: 2px solid #b7c1b8;
  border-radius: 50%;
  transition: .3s ease;
}

.time-point:hover .point {
  border-color: var(--accent);
  transform: scale(1.2);
}

.time-point.active .point {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 0 6px rgba(196,111,81,.13);
}

.time-point strong {
  display: block;
  font-family: "Playfair Display", serif;
  font-size: 26px;
  font-weight: 400;
  transition: color .3s;
}

.time-point.active strong {
  color: var(--ink);
}

.time-point small {
  display: block;
  margin-top: 7px;
  font-family: "DM Mono", monospace;
  font-size: 8px;
  letter-spacing: 1px;
}

/* STORY */

.story {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 7%;
  min-height: 500px;
  align-items: center;
}

.story-copy {
  padding: 15px 0;
}

.story-index {
  display: flex;
  justify-content: space-between;
  max-width: 350px;
  color: var(--accent);
}

.story-year {
  font-family: "Playfair Display", serif;
  font-size: clamp(100px, 13vw, 200px);
  line-height: 1;
  letter-spacing: -.08em;
  color: rgba(38,61,53,.09);
  margin: 10px 0 -35px -8px;
}

.story h2 {
  position: relative;
  font-family: "Playfair Display", serif;
  font-size: clamp(45px, 5vw, 75px);
  line-height: 1.07;
  letter-spacing: -.05em;
  font-weight: 400;
  margin: 0;
}

.story-rule {
  width: 55px;
  height: 2px;
  background: var(--accent);
  margin: 35px 0 25px;
}

.story-copy p {
  max-width: 400px;
  font-size: 14px;
  line-height: 1.85;
  color: #687970;
}

.story-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 35px;
}

.story-controls button {
  width: 45px;
  height: 45px;
  border: 1px solid var(--line);
  background: transparent;
  border-radius: 50%;
  color: var(--ink);
  cursor: pointer;
  font-size: 18px;
  transition: .25s;
}

.story-controls button:hover:not(:disabled) {
  background: var(--ink);
  color: white;
  transform: translateY(-2px);
}

.story-controls button:disabled {
  opacity: .3;
  cursor: not-allowed;
}

.story-controls span {
  font-family: "DM Mono", monospace;
  font-size: 8px;
  color: var(--muted);
  margin-left: 10px;
  letter-spacing: 1px;
}

/* IMAGE */

.story-visual {
  position: relative;
  min-width: 0;
}

.image-frame {
  height: 470px;
  overflow: hidden;
  background: #d9d6cb;
}

.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(35%) contrast(1.04);
  transition: transform .7s ease, opacity .35s ease;
}

.image-frame:hover img {
  transform: scale(1.04);
}

.image-caption {
  display: flex;
  justify-content: space-between;
  margin-top: 15px;
  color: var(--muted);
}

.visual-decoration {
  position: absolute;
  top: -65px;
  right: -20px;
  font-family: "Playfair Display", serif;
  font-size: 110px;
  font-style: italic;
  color: var(--accent);
  opacity: .18;
  pointer-events: none;
}

/* ANIMATION */

.story.changing .story-copy,
.story.changing .story-visual {
  animation: storyEnter .5s ease both;
}

.story.changing .story-visual {
  animation-delay: .08s;
}

@keyframes storyEnter {
  from {
    opacity: .35;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* BOTTOM PROGRESS */

.bottom-progress {
  display: flex;
  align-items: center;
  gap: 20px;
  color: var(--muted);
  margin: 75px 0 45px;
}

.progress-line {
  flex: 1;
  height: 3px;
  background: var(--line);
  overflow: hidden;
}

.progress-line div {
  width: 0%;
  height: 100%;
  background: var(--accent);
  transition: width .65s ease;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  border-top: 1px solid var(--line);
  padding: 25px 0;
  color: var(--muted);
}

/* RESPONSIVE */

@media (max-width: 800px) {
  .top-center { display: none; }
  .intro { padding: 60px 0; }
  .timeline-nav { margin: 45px 0 60px; }
  .time-point strong { font-size: 20px; }
  .story { grid-template-columns: 1fr; gap: 35px; }
  .story-year { font-size: 110px; }
  .image-frame { height: 350px; }
}

@media (max-width: 500px) {
  .chronicle { padding: 0 20px; }
  .intro h1 { font-size: 48px; }
  .intro-bottom { flex-direction: column; align-items: flex-start; }
  .time-point strong { font-size: 16px; }
  .time-point small { font-size: 6px; }
  .timeline-nav { margin-bottom: 40px; }
  .story h2 { font-size: 46px; }
  .image-frame { height: 270px; }
  .story-controls span { display: none; }
  footer { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}

const events = [
  {
    year: "1903",
    category: "AVIATION",
    title: "The world<br>takes flight.",
    description: "On December 17, 1903, the Wright brothers achieved the first sustained, controlled flight of a powered, heavier-than-air aircraft, changing transportation forever.",
    image: "https://upload.wikimedia.org/wikipedia/commons/8/86/First_flight2.jpg",
    alt: "Wright brothers' first powered flight",
    caption: "THE WRIGHT FLYER / 1903"
  },
  {
    year: "1928",
    category: "MEDICINE",
    title: "A discovery<br>that saved millions.",
    description: "Alexander Fleming observed the antibacterial effect of Penicillium mold, leading to the discovery of penicillin and eventually transforming modern medicine.",
    image: "https://images.unsplash.com/photo-1532094349884-543bc11b234d?auto=format&fit=crop&w=1200&q=85",
    alt: "Scientific laboratory glassware",
    caption: "THE AGE OF ANTIBIOTICS / 1928"
  },
  {
    year: "1969",
    category: "SPACE",
    title: "One giant<br>leap for mankind.",
    description: "Apollo 11 successfully landed humans on the Moon. Neil Armstrong and Buzz Aldrin walked on the lunar surface, marking a defining moment in space exploration.",
    image: "https://images.unsplash.com/photo-1446776811953-b23d57bd21aa?auto=format&fit=crop&w=1200&q=85",
    alt: "Earth seen from space",
    caption: "APOLLO 11 / 1969"
  },
  {
    year: "1989",
    category: "INTERNET",
    title: "The web<br>is imagined.",
    description: "Tim Berners-Lee proposed the system that would become the World Wide Web at CERN, laying the foundation for a new era of global information sharing.",
    image: "https://images.unsplash.com/photo-1518770660439-4636190af475?auto=format&fit=crop&w=1200&q=85",
    alt: "Close-up of electronic circuitry",
    caption: "WORLD WIDE WEB / 1989"
  },
  {
    year: "2007",
    category: "MOBILE",
    title: "A computer<br>in every pocket.",
    description: "Apple introduced the first iPhone, bringing a multi-touch interface, internet communication, and a new model of mobile computing to a mass-market smartphone.",
    image: "https://images.unsplash.com/photo-1511707171634-5f897ff02aa9?auto=format&fit=crop&w=1200&q=85",
    alt: "Modern smartphone",
    caption: "THE SMARTPHONE ERA / 2007"
  }
];

const points = [...document.querySelectorAll(".time-point")];
const story = document.getElementById("story");
const nav = document.getElementById("timelineNav");
const progress = document.getElementById("timelineProgress");
const bottomFill = document.getElementById("bottomProgressFill");

let current = 0;

function showEvent(index) {
  if (index < 0 || index >= events.length) return;

current = index;
  const event = events[index];

document.getElementById("storyNumber").textContent =
    String(index + 1).padStart(2, "0") +
    " / " +
    String(events.length).padStart(2, "0");

document.getElementById("storyCategory").textContent =
    event.category;

document.getElementById("storyYear").textContent =
    event.year;

document.getElementById("storyTitle").innerHTML =
    event.title;

document.getElementById("storyDescription").textContent =
    event.description;

const img = document.getElementById("storyImage");
  img.src = event.image;
  img.alt = event.alt;

document.getElementById("imageCaption").textContent =
    event.caption;

points.forEach((point, i) => {
    point.classList.toggle("active", i === index);
    point.setAttribute("aria-pressed", String(i === index));
  });

// Connect the first marker to the active marker.
  const firstDot = points[0].querySelector(".point");
  const activeDot = points[index].querySelector(".point");

const navRect = nav.getBoundingClientRect();
  const firstRect = firstDot.getBoundingClientRect();
  const activeRect = activeDot.getBoundingClientRect();

const startX = firstRect.left + firstRect.width / 2 - navRect.left;
  const endX = activeRect.left + activeRect.width / 2 - navRect.left;

progress.style.left = startX + "px";
  progress.style.width = Math.max(0, endX - startX) + "px";

// Keep the track aligned with the markers.
  const track = nav.querySelector(".timeline-track");
  const lastRect = points[points.length - 1]
    .querySelector(".point").getBoundingClientRect();

const lastX = lastRect.left + lastRect.width / 2 - navRect.left;
  track.style.left = startX + "px";
  track.style.width = (lastX - startX) + "px";

bottomFill.style.width =
    (index / (events.length - 1)) * 100 + "%";

document.getElementById("prevBtn").disabled = index === 0;
  document.getElementById("nextBtn").disabled =
    index === events.length - 1;

story.classList.remove("changing");
  void story.offsetWidth;
  story.classList.add("changing");
}

points.forEach((point, index) => {
  point.addEventListener("click", () => showEvent(index));
});

document.getElementById("prevBtn").addEventListener(
  "click", () => showEvent(current - 1)
);

document.getElementById("nextBtn").addEventListener(
  "click", () => showEvent(current + 1)
);

document.addEventListener("keydown", (event) => {
  if (event.altKey || event.ctrlKey || event.metaKey) return;
  if (event.key === "ArrowRight") showEvent(current + 1);
  if (event.key === "ArrowLeft") showEvent(current - 1);
});

window.addEventListener("resize", () => showEvent(current));

showEvent(0);

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