Mobile Stepper

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

.onboarding {
  width: 100%;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

/* Slides */
.slides-container {
  flex: 1;
  position: relative;
  overflow: hidden;
}

.slide {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 32px;
  text-align: center;
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.4s ease, transform 0.4s ease;
  pointer-events: none;
}

.slide.active {
  opacity: 1;
  transform: translateX(0);
  pointer-events: all;
}

.slide.exit-left {
  opacity: 0;
  transform: translateX(-40px);
}

/* Illustrations */
.slide-illustration {
  width: 180px;
  height: 180px;
  border-radius: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 40px;
}

.ill1 {
  background: linear-gradient(135deg, #f59e0b, #ef4444);
}
.ill2 {
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
}
.ill3 {
  background: linear-gradient(135deg, #10b981, #0ea5e9);
}

.ill-icon {
  width: 80px;
  height: 80px;
}

/* Text */
.slide-text h2 {
  font-size: 26px;
  font-weight: 800;
  color: #111;
  margin-bottom: 14px;
  line-height: 1.2;
}

.slide-text p {
  font-size: 16px;
  color: #666;
  line-height: 1.6;
  max-width: 300px;
  margin: 0 auto;
}

/* Footer */
.onboarding-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px 36px;
  background: #fff;
  border-top: 1px solid #f0f0f0;
  gap: 16px;
}

.skip-btn {
  border: none;
  background: none;
  font-size: 14px;
  font-weight: 600;
  color: #999;
  cursor: pointer;
  padding: 8px 4px;
  min-width: 48px;
  transition: color 0.2s;
}

.skip-btn:hover {
  color: #555;
}

/* Dots */
.dots {
  display: flex;
  gap: 6px;
  align-items: center;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 4px;
  background: #d1d5db;
  border: none;
  padding: 0;
  cursor: pointer;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1), background 0.3s ease;
}

.dot.active {
  width: 24px;
  background: #6366f1;
}

/* Next / Get Started */
.next-btn {
  padding: 10px 20px;
  background: #6366f1;
  color: #fff;
  border: none;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s, background 0.2s;
  min-width: 100px;
  text-align: center;
}

.next-btn:active {
  transform: scale(0.96);
}
.next-btn.finish {
  background: #10b981;
}

const slides = document.querySelectorAll(".slide");
const dots = document.querySelectorAll(".dot");
const nextBtn = document.getElementById("nextBtn");
const skipBtn = document.getElementById("skipBtn");
const total = slides.length;

let current = 0;

function goTo(index) {
  if (index < 0 || index >= total) return;

  // Exit current slide
  slides[current].classList.remove("active");
  slides[current].classList.add("exit-left");
  setTimeout(() => slides[current].classList.remove("exit-left"), 400);

  current = index;

  // Enter new slide
  slides[current].classList.add("active");

  // Update dots
  dots.forEach((dot, i) => dot.classList.toggle("active", i === current));

  // Update next button
  if (current === total - 1) {
    nextBtn.textContent = "Get Started";
    nextBtn.classList.add("finish");
    skipBtn.style.visibility = "hidden";
  } else {
    nextBtn.textContent = "Next";
    nextBtn.classList.remove("finish");
    skipBtn.style.visibility = "visible";
  }
}

nextBtn.addEventListener("click", () => {
  if (current === total - 1) {
    // "Get Started" action
    nextBtn.textContent = "Done!";
    setTimeout(() => {
      nextBtn.textContent = "Get Started";
      goTo(0);
      skipBtn.style.visibility = "visible";
    }, 1500);
  } else {
    goTo(current + 1);
  }
});

skipBtn.addEventListener("click", () => goTo(total - 1));

dots.forEach((dot) => {
  dot.addEventListener("click", () => goTo(Number(dot.dataset.step)));
});

<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link rel="stylesheet" href="style.css" />
    <title>Mobile Stepper</title>
  </head>
  <body>
    <div class="onboarding" id="onboarding">

      <!-- Slides -->
      <div class="slides-container" id="slidesContainer">
        <div class="slide active" data-step="0">
          <div class="slide-illustration ill1">
            <svg class="ill-icon" viewBox="0 0 80 80" fill="none">
              <circle cx="40" cy="40" r="36" fill="rgba(255,255,255,0.15)"/>
              <path d="M20 52L32 36l10 12 8-10 10 14H20z" fill="rgba(255,255,255,0.6)"/>
              <circle cx="52" cy="28" r="6" fill="rgba(255,255,255,0.8)"/>
            </svg>
          </div>
          <div class="slide-text">
            <h2>Beautiful on every screen</h2>
            <p>Designed for mobile-first experiences that feel natural and fluid on any device.</p>
          </div>
        </div>

        <div class="slide" data-step="1">
          <div class="slide-illustration ill2">
            <svg class="ill-icon" viewBox="0 0 80 80" fill="none">
              <circle cx="40" cy="40" r="36" fill="rgba(255,255,255,0.15)"/>
              <rect x="20" y="24" width="40" height="32" rx="4" fill="rgba(255,255,255,0.3)"/>
              <rect x="26" y="30" width="16" height="3" rx="1.5" fill="rgba(255,255,255,0.8)"/>
              <rect x="26" y="36" width="28" height="3" rx="1.5" fill="rgba(255,255,255,0.6)"/>
              <rect x="26" y="42" width="20" height="3" rx="1.5" fill="rgba(255,255,255,0.5)"/>
            </svg>
          </div>
          <div class="slide-text">
            <h2>Instant, no-friction access</h2>
            <p>One tap to get to what matters. No loading screens, no unnecessary steps.</p>
          </div>
        </div>

        <div class="slide" data-step="2">
          <div class="slide-illustration ill3">
            <svg class="ill-icon" viewBox="0 0 80 80" fill="none">
              <circle cx="40" cy="40" r="36" fill="rgba(255,255,255,0.15)"/>
              <path d="M28 40l8 8 16-16" stroke="rgba(255,255,255,0.9)" stroke-width="4" stroke-linecap="round" stroke-linejoin="round"/>
            </svg>
          </div>
          <div class="slide-text">
            <h2>You're all set</h2>
            <p>Everything is configured and ready. Tap Get Started to begin your journey.</p>
          </div>
        </div>
      </div>

      <!-- Bottom bar -->
      <div class="onboarding-footer">
        <button class="skip-btn" id="skipBtn">Skip</button>

        <div class="dots" id="dots" aria-label="Step indicator" role="tablist">
          <button class="dot active" data-step="0" role="tab" aria-label="Step 1"></button>
          <button class="dot" data-step="1" role="tab" aria-label="Step 2"></button>
          <button class="dot" data-step="2" role="tab" aria-label="Step 3"></button>
        </div>

        <button class="next-btn" id="nextBtn">Next</button>
      </div>
    </div>
    <script src="script.js"></script>
  </body>
</html>