:root {
  --font-sans:
    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;

  --color-primary: #e35169;
  --color-primary-hover: #cc3f56;
  --color-primary-light: #f07b8e;
  --color-primary-ultra-light: #fdedf0;
  --color-accent: #f4a261;
  --color-accent-warm: #e9c46a;

  --color-bg-page: #f8f9fc;
  --color-bg-surface: #ffffff;
  --color-bg-dark: #1a1522;
  --color-bg-dark-card: #251d2e;

  --color-text-main: #1a1522;
  --color-text-secondary: #64748b;
  --color-text-light: #94a3b8;
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;

  --radius-card: 1rem;
  --radius-lg: 1.5rem;
  --radius-pill: 999px;

  --shadow-soft: 0 10px 30px rgba(26, 21, 34, 0.08);
  --shadow-hover: 0 20px 45px rgba(227, 81, 105, 0.2);
  --shadow-glow: 0 10px 24px rgba(227, 81, 105, 0.28);

  --transition-fast: 220ms ease;
  --transition-medium: 320ms ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-snap-type: y mandatory;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: -0.01em;
  color: var(--color-text-main);
  background-color: var(--color-bg-page);
  overflow-x: hidden;
}

section {
  position: relative;
  min-height: 100vh;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.15rem;
}

section:nth-of-type(odd) {
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.9) 0%,
    rgba(248, 249, 252, 0.95) 100%
  );
}

section:nth-of-type(even) {
  background: var(--color-bg-page);
}

section::before {
  content: "";
  position: absolute;
  inset: 8% auto auto 8%;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(227, 81, 105, 0.16) 0%,
    rgba(227, 81, 105, 0) 70%
  );
  pointer-events: none;
}

section::after {
  content: "";
  position: absolute;
  inset: auto 8% 8% auto;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(244, 162, 97, 0.12) 0%,
    rgba(244, 162, 97, 0) 70%
  );
  pointer-events: none;
}

.slide {
  position: relative;
  z-index: 1;
  aspect-ratio: 297 / 210;
  width: min(98vw, calc((100vh - 2rem) * 297 / 210));
  max-width: 1200px;
  margin-inline: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-bg-surface);
  color: var(--color-text-main);
  box-shadow: var(--shadow-soft);
  padding: clamp(1rem, 2.5vw, 2rem);
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  transition: none;
}

.slide-cover {
  border: none;
  background: linear-gradient(120deg, #f7f5fb 0%, #eaf2ff 100%);
}

.cover-content {
  width: min(900px, 90%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: clamp(1rem, 2vw, 1.5rem);
}

.cover-logo {
  width: clamp(52px, 5.2vw, 78px);
  height: auto;
  display: block;
}

.cover-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(0.5rem, 1.2vw, 1rem);
}

.cover-logo-plus {
  font-size: clamp(1.5rem, 2.2vw, 2rem);
  line-height: 1;
  color: #344256;
  font-weight: 700;
}

.cover-logo-vodafone {
  width: clamp(76px, 7.2vw, 108px);
  height: auto;
  display: block;
}

.cover-title {
  font-size: clamp(2.2rem, 5.5vw, 5rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: #14122a;
  font-weight: 800;
}

.cover-description {
  max-width: 760px;
  font-size: clamp(1rem, 1.8vw, 2rem);
  line-height: 1.45;
  color: #5f6f86;
  font-weight: 500;
}

.slide-info {
  justify-content: flex-start;
  text-align: left;
}

.info-content {
  width: min(980px, 92%);
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: clamp(0.75rem, 1.4vw, 1.2rem);
}

.info-title {
  font-size: clamp(1.6rem, 3vw, 2.8rem);
  line-height: 1.15;
  color: #14122a;
}

.info-description {
  font-size: clamp(1rem, 1.4vw, 1.35rem);
  color: #4e5f77;
  max-width: 900px;
}

.info-list {
  list-style: disc;
  padding-left: 1.3rem;
  display: grid;
  gap: clamp(0.45rem, 0.9vw, 0.85rem);
  font-size: clamp(0.98rem, 1.25vw, 1.2rem);
  color: #2d3e55;
  font-weight: 500;
}

.slide:focus-visible {
  outline: 3px solid rgba(227, 81, 105, 0.28);
  outline-offset: 2px;
}

::selection {
  background: rgba(227, 81, 105, 0.2);
  color: var(--color-text-main);
}

@media (max-width: 768px) {
  html {
    scroll-snap-type: y proximity;
  }

  section {
    padding: 0.1rem;
  }

  .slide {
    width: min(99vw, calc((100vh - 1rem) * 297 / 210));
    border-radius: var(--radius-card);
    font-size: 0.95rem;
  }

  .cover-content {
    width: 94%;
  }

  .cover-description {
    max-width: 100%;
  }

  .slide-info {
    justify-content: center;
  }

  .info-content {
    width: 94%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
    scroll-snap-type: y proximity;
  }

  section {
    scroll-snap-stop: normal;
  }

  .slide {
    transition: none;
  }
}