/* Style Guide Variables */
:root {
  --purple-700: hsl(257, 40%, 49%);
  --magenta-400: hsl(300, 69%, 71%);
  --white: #ffffff;

  --font-family-sans: "Open Sans", sans-serif;
  --font-family-heading: "Poppins", sans-serif;
}

/* Basic Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Basic SetUp */
body {
  font-family: var(--font-family-sans);
  background-color: var(--purple-700);
  /* mobile background */
  background-image: url("../images/bg-mobile.svg");
  background-size: contain;
  background-position: top left;
  background-repeat: no-repeat;
  color: var(--white);
  min-height: fit-content;
  display: flex;
  flex-direction: column;
}

h1,
h2,
h3 {
  font-family: var(--font-family-heading);
  font-weight: 600;
}

/* =========================================
   ACCESSIBILITY
   ========================================= */

/* Provides a highly visible focus indicator for keyboard users navigating with 'Tab' */
:focus-visible {
  outline: 3px dashed var(--magenta-400);
  outline-offset: 4px;
  border-radius: 4px;
}

/* Specifically rounding the focus outline for the pill-shaped button and circular icons */
.btn:focus-visible,
.social-icon:focus-visible {
  border-radius: 2rem;
}

/* =========================================
   LAYOUT & STYLING (Mobile Small - 320px a 390px)
   ========================================= */

/* Main Container */
.container {
  width: 100%;
  max-width: 100%;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* Header */
header {
  margin-bottom: 3rem;
}

.logo {
  width: 130px;
}

/* Hero Section */
main {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 3rem;
  flex: 1;
}

.hero-image {
  width: 100%;
}

.hero-image img {
  width: 100%;
  max-width: 700px;
  height: auto;
  display: block;
  margin: 0 auto;
}

.hero-text {
  width: 100%;
  max-width: 520px;
}

/* =========================================
   TYPESCALE RESPONSIVO E FLUIDO (320px a 2560px)
   ========================================= */

.hero-text h1 {
  font-family: var(--font-family-heading);
  font-weight: 600;
  margin-bottom: 1.5rem;
  /* Type scale calc 32px (mobile) and 72px (4K/2560px) */
  font-size: clamp(2rem, 1.571rem + 2.143vw, 4.5rem);
  line-height: 1.2;
}

.hero-text p {
  font-family: var(--font-family-sans);
  font-weight: 400;
  opacity: 0.9;
  margin-bottom: 2rem;
  /* Type scale calc 16px (mobile) e 28px (4K/2560px) */
  font-size: clamp(1rem, 0.893rem + 0.536vw, 1.75rem);
  line-height: 1.5;
}

/* Register Button */
.btn {
  display: inline-block;
  background-color: var(--white);
  color: var(--purple-700);
  font-family: var(--font-family-heading);
  font-weight: 600;
  text-decoration: none;
  border-radius: 2rem;
  box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
  transition: all 0.3s ease;

  /* Type scale calc 14px (mobile) e 22px (4K/2560px) */
  font-size: clamp(0.875rem, 0.804rem + 0.357vw, 1.375rem);
  /* responsive padding */
  padding: clamp(0.8rem, 0.736rem + 0.321vw, 1.25rem)
    clamp(3.5rem, 3.286rem + 1.071vw, 5rem);
}

.btn:hover,
.btn:active {
  background-color: var(--magenta-400);
  color: var(--purple-700);
  cursor: pointer;
}

/* Social Icons */
.social-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 2rem;
}

.social-icon {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--white);
  border-radius: 50%;
  color: var(--white);
  text-decoration: none;
  transition: all 0.3s ease;
}

.social-icon:hover,
.social-icon:active {
  color: var(--magenta-400);
  border-color: var(--magenta-400);
}

/* Attribution Footer */
.attribution {
  font-size: 0.75rem;
  text-align: center;
  padding: 1rem;
  color: rgb(255, 255, 255);
}

.attribution a {
  color: var(--white);
  text-decoration: none;
}

.attribution a:hover,
.attribution a:active {
  text-decoration: underline;
}

/* =========================================
   RESPONSIVE LAYOUT MEDIA QUERIES 
   ========================================= */

/* Transition for Desktop (> 1024px) */
@media (min-width: 1024px) {
  body {
    /* desktop background */
    background-image: url("../assets/images/bg-desktop.svg");
    background-size: auto;
    max-height: 100vh;
  }

  .container {
    max-width: 1440px;
    padding: 3rem 4rem;
    overflow: hidden;
  }

  header {
    margin-bottom: 2rem;
  }

  .logo {
    width: 160px;
  }

  main {
    /* Transitions the layout from a vertical mobile view to side-by-side columns */
    flex-direction: row;
    text-align: left;
    align-items: center; /* Aligns the content vertically */
    gap: 4rem;
  }

  /* Ensures that both sides share the space fairly and fluidly. */
  .hero-image,
  .hero-text {
    flex: 1;
    max-width: 100%; /* Prevents the image or text from exceeding the container width */
  }

  .hero-image img {
    margin: 0; /* Removes automatic centering */
  }

  .social-links {
    justify-content: flex-end; /* Icons to the right on desktop */
    margin-top: auto;
    padding-top: 1rem;
  }
}

/* Big screens and Ultra-Res (> 1920px) */
@media (min-width: 1920px) {
  .container {
    max-width: 1920px;
    padding: 6rem 8rem;
  }

  main {
    gap: 6rem;
  }

  .hero-text p {
    /* Limits the width of the paragraph on large screens */
    max-width: 650px;
  }
}