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

:root {
  --color-bg: #ffffff;
  --color-text: #1a1a2e;
  --color-text-secondary: #555566;
  --color-accent: #0071e3;
  --color-accent-hover: #0060c0;
  --color-section-alt: #f5f5f7;
  --color-border: #d2d2d7;
  --color-success: #2d8a4e;
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --max-width: 960px;
  --section-padding: 80px 24px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-stack);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Hero */
.hero {
  padding: 100px 24px 80px;
  text-align: center;
  background: linear-gradient(180deg, #f0f4ff 0%, var(--color-bg) 100%);
}

.hero__icon {
  width: 120px;
  height: 120px;
  border-radius: 26px;
  margin: 0 auto 24px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
}

.hero__title {
  font-size: 48px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
}

.hero__tagline {
  font-size: 20px;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.hero__cta-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__cta {
  display: inline-flex;
  transition: opacity 0.2s;
}

.hero__cta:hover {
  opacity: 0.85;
  text-decoration: none;
}

.hero__cta img {
  height: 66px;
  width: auto;
}

.hero__meta {
  margin-top: 14px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

/* Screenshots */
.screenshots {
  padding: var(--section-padding);
  background: var(--color-section-alt);
}

.screenshots__heading {
  text-align: center;
  font-size: 32px;
  font-weight: 600;
  margin-bottom: 40px;
}

.screenshots__grid {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 16px;
}

.screenshots__grid::-webkit-scrollbar {
  height: 6px;
}

.screenshots__grid::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 3px;
}

.screenshots__item {
  flex: 0 0 auto;
  width: 240px;
  scroll-snap-align: center;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
  background: #fff;
}

.screenshots__item img {
  width: 100%;
  height: auto;
}

/* Features */
.features {
  padding: var(--section-padding);
}

.features__heading {
  text-align: center;
  font-size: 32px;
  font-weight: 600;
  margin-bottom: 48px;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 40px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.feature-card {
  text-align: center;
  padding: 0 16px;
}

.feature-card__icon {
  font-size: 40px;
  margin-bottom: 16px;
  line-height: 1;
}

.feature-card__title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card__desc {
  font-size: 16px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* Feedback */
.feedback {
  padding: var(--section-padding);
  background: var(--color-section-alt);
}

.feedback__heading {
  text-align: center;
  font-size: 32px;
  font-weight: 600;
  margin-bottom: 12px;
}

.feedback__subheading {
  text-align: center;
  color: var(--color-text-secondary);
  margin-bottom: 40px;
  font-size: 16px;
}

.feedback__form {
  max-width: 520px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.feedback__form input,
.feedback__form textarea {
  width: 100%;
  padding: 14px 16px;
  font-size: 16px;
  font-family: var(--font-stack);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: #fff;
  color: var(--color-text);
  transition: border-color 0.2s;
}

.feedback__form input:focus,
.feedback__form textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.15);
}

.feedback__form textarea {
  min-height: 120px;
  resize: vertical;
}

.feedback__form button {
  padding: 14px 32px;
  font-size: 16px;
  font-weight: 600;
  font-family: var(--font-stack);
  color: #fff;
  background: var(--color-accent);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.2s;
}

.feedback__form button:hover {
  background: var(--color-accent-hover);
}

.feedback__fallback {
  text-align: center;
  margin-top: 16px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

/* Thank You (shown via :target) */
.thank-you {
  display: none;
  padding: 60px 24px;
  text-align: center;
  background: var(--color-section-alt);
}

.thank-you:target {
  display: block;
}

.thank-you:target ~ .feedback {
  display: none;
}

.thank-you__icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.thank-you__title {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-success);
}

.thank-you__text {
  font-size: 16px;
  color: var(--color-text-secondary);
}

/* Footer */
.footer {
  padding: 40px 24px;
  text-align: center;
  border-top: 1px solid var(--color-border);
}

.footer__links {
  margin-bottom: 12px;
  font-size: 14px;
}

.footer__links a {
  color: var(--color-text-secondary);
  margin: 0 12px;
}

.footer__links a:hover {
  color: var(--color-accent);
}

.footer__copyright {
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* Responsive */
@media (min-width: 768px) {
  .screenshots__grid {
    justify-content: center;
    overflow-x: visible;
    flex-wrap: wrap;
  }

  .screenshots__item {
    width: 220px;
  }
}

@media (max-width: 600px) {
  .hero {
    padding: 72px 20px 60px;
  }

  .hero__title {
    font-size: 36px;
  }

  .hero__tagline {
    font-size: 17px;
  }

  .hero__cta img {
    height: 58px;
  }

  .hero__cta-row {
    flex-direction: column;
  }

  :root {
    --section-padding: 56px 20px;
  }

  .screenshots__heading,
  .features__heading,
  .feedback__heading {
    font-size: 26px;
  }

  .screenshots__item {
    width: 200px;
  }

  .features__grid {
    gap: 32px;
  }
}