:root {
  --canvas-bg: rgb(242,242,242);
  --primary-radius: 8px;
  --shadow: rgba(0,0,0,0.15) 0 2px 6px;
  --rainbow: linear-gradient(90deg,
    red,orange,yellow,green,blue,indigo,violet);
  --font-sans: system-ui, -apple-system, sans-serif;
  --spacing: clamp(6vh, 6vw, 10rem);
}

/* @link https://utopia.fyi/type/calculator?c=320,18,1.333,1240,22,1.333,5,2,&s=0.75|0.5|0.25,1.5|2|3|4|6,s-l&g=s,l,xl,12 */

:root {
  --step--2: clamp(0.6331rem, 0.5842rem + 0.2447vw, 0.7738rem);
  --step--1: clamp(0.844rem, 0.7787rem + 0.3262vw, 1.0315rem);
  --step-0: clamp(1.125rem, 1.038rem + 0.4348vw, 1.375rem);
  --step-1: clamp(1.4996rem, 1.3837rem + 0.5796vw, 1.8329rem);
  --step-2: clamp(1.999rem, 1.8445rem + 0.7726vw, 2.4432rem);
  --step-3: clamp(2.6647rem, 2.4587rem + 1.0298vw, 3.2568rem);
  --step-4: clamp(3.552rem, 3.2775rem + 1.3728vw, 4.3413rem);
  --step-5: clamp(4.7348rem, 4.3688rem + 1.8299vw, 5.787rem);
}

* {
  box-sizing: border-box;
}

::selection {
  background-color: #000;
  color: #fff;
}

::-moz-selection {
  background-color: #000;
  color: #fff;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.5;
  background-size: 100% 100%;
  background-position: top left;
  background-attachment: fixed;
  background-image: radial-gradient(49% 81% at 18% 92%, #0015FF69 0%, #073AFF00 100%),radial-gradient(113% 91% at 55% -10%, #F1FF00FF 1%, #FF000000 99%),radial-gradient(142% 91% at 83% 7%, #FFDB00FF 1%, #FF000000 99%),radial-gradient(142% 91% at -6% 74%, #FF0049FF 1%, #FF000000 99%),radial-gradient(142% 91% at 111% 84%, #FF7000FF 0%, #FF0000FF 100%);
  cursor: url('brush-cursor.png') 0 28, pointer;
}

a {
  text-decoration: none;
  color: inherit;
}

main {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing);
  padding-inline: 2vw;
  padding-block: 4vh;
}

section {
  padding: clamp(1rem, 5vh, 4rem)
    clamp(1rem, 5vw, 4rem);
  margin-inline: 2vw;
  max-width: 1280px;
  width: 100%;
}

.opaque {
  background: var(--canvas-bg);
  border-radius: var(--primary-radius);
  box-shadow: var(--shadow);
}

h1 {
  font-size: max(var(--step-5), 10vw);
  line-height: 0.8;
  color: #FFF;
  text-align: center;
  margin: 0 0 1rem 0;
  text-shadow:
    2px 2px 0 #9400D3,
    4px 4px 0 #4B0082,
    6px 6px 0 #0000FF,
    8px 8px 0 #00FF00,
    10px 10px 0 #FFFF00,
    12px 12px 0 #FF7F00,
    14px 14px 0 #FF0000,
    0 5px 20px rgba(0,0,0,0.3);
}

h2, h3 {
  font-weight: 700;
}

h2 {
  font-size: var(--step-3);
  text-align: center;
  margin: 0 0 2rem 0;
}

h3 {
  font-size: var(--step-1);
  margin: 0 0 0.5rem 0;
}

p {
  margin: 0 0 1rem 0;
}

#hero {
  max-width: revert;
  padding-block-start: 10vh;
  padding-block-end: 4vw;
}

.tagline {
  font-size: var(--step-2);
  text-align: center;
  color: #0000A0;
  margin-bottom: 10vh;
}

.screenshot-container {
  max-width: revert;
  margin-block-start: 5vh;
  display: grid;
  /* https://css-tricks.com/equal-width-columns-in-css-grid-are-kinda-weird/ */
  grid-template-columns: repeat(6, minmax(0, 1fr));
  grid-template-rows: repeat(4, minmax(10vh, 10vw));
}

.screenshot-container img {
  max-height: 100%;
  object-fit: contain;
  width: 100%;
  filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.3));
}

.screenshot-mac {
  grid-column: 1 / 5;
  grid-row: 1 / 4;
  order: 1;
  text-align: left;
}

.screenshot-ipad {
  grid-column: 3 / 7;
  grid-row: 2 / 5;
  order: 3;
  transform: translate(2vw, 2vh) scale(0.85);
  text-align: right;
}

.screenshot-iphone {
  grid-column: 5 / 7;
  grid-row: 1 / 4;
  order: 2;
  transform: translate(-2rem, -2vw) scale(0.7);
  text-align: right;
}

@media (max-width: 900px) {
  .screenshot-mac {
    grid-column: 1 / 6;
    grid-row: 1 / 4;
    order: 1;
    text-align: left;
  }

  .screenshot-ipad {
    grid-column: 2 / 7;
    grid-row: 2 / 5;
    order: 3;
    transform: translate(2rem, 2rem) scale(0.8);
    text-align: right;
  }

  .screenshot-iphone {
    grid-column: 4 / 7;
    grid-row: 1 / 4;
    order: 2;
  }
}

@media (max-width: 600px) {
  .screenshot-container {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    gap: 2rem;
  }

  .screenshot-mac,
  .screenshot-ipad,
  .screenshot-iphone {
    grid-column: 1;
    grid-row: auto;
    transform: none;
    text-align: center;
  }

  .screenshot-iphone img {
    max-height: 50vh;
  }

  .screenshot-container img {
    max-width: 100%;
    height: auto;
  }
}

.cta-buttons {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.btn.testflight {
  font-size: var(--step-1);
  display: inline-block;
  padding: 0.3em 0.69em;
  color: white; background: #000044;
  text-decoration: none;
  transition: transform 0.2s ease;
  box-shadow: var(--shadow);
}
.btn.testflight:hover {
  transform: translateY(-0.1rem);
  box-shadow: rgba(0,0,0,0.2) 0 4px 12px;
}

.btn.badge {
  display: inline-block;
  border-radius: var(--primary-radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform 0.2s ease;
}

.btn.badge:hover {
  transform: translateY(-2px);
  box-shadow: rgba(0,0,0,0.2) 0 4px 12px;
}

.badge {
  width: 200px;
  margin-block: 40px; /* Apple guideline minimum*/
}

.badge img {
  width: 100%;
  height: auto;
  display: block;
}

.btn.appicon {
  position: relative;
  display: inline-block;
  overflow: visible;
}

.btn.appicon::before {
  content: '';
  position: absolute;
  top: 0%;
  left: 0%;
  right: 0%;
  bottom: 0%;
  background: rgba(75, 0, 130);
  border-radius: 20%;
  filter: blur(max(3vh, 5vw));
  opacity: 0.4;
  transform: scale(1.05);
  z-index: -1;
}

.btn.appicon::after {
  content: '';
  position: absolute;
  top: 0px;
  left: 0px;
  right: 0px;
  bottom: 0px;
  background: rgba(75, 0, 130, 0.3);
  border-radius: 20%;
  filter: blur(max(0.5vh, 1vw));
  z-index: -1;
}

.app-icon {
  width: auto;
  max-width: 70vw;
  max-height: 30vh;
  position: relative;
  z-index: 1;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(20rem, 1fr));
  gap: 1vw;
  margin-top: 2rem;
}

.feature-card {
  background: white;
  box-shadow: 0 1px 2px rgba(20,0,20,0.2);
  padding: 2rem;
  border-radius: var(--primary-radius);
  text-align: center;
}

.feature-icon {
  font-size: var(--step-3);
  margin-bottom: 1rem;
}

.feature-card p {
  color: #666;
  font-size: var(--step--1);
}

.platforms-container {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin: 2rem 0;
  flex-wrap: wrap;
}

.platform {
  text-align: center;
}

.platform-icon {
  height: var(--step-5);
  width: auto;
  margin-bottom: 0.5rem;
}

.single-purchase {
  text-align: center;
  font-style: italic;
  color: #666;
}

.email-signup {
  text-align: center;
  margin-bottom: 3rem;
}

.signup-form {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.email-input {
  padding: 0.75rem 1rem;
  font-size: 1rem;
  border: 1px solid #ddd;
  border-radius: var(--primary-radius);
  min-width: 250px;
  font-family: var(--font-sans);
}

.submit-btn {
  padding: 0.75rem 2rem;
  font-size: 1rem;
  background: #333;
  color: white;
  border: none;
  cursor: pointer;
  font-weight: 600;
  font-family: var(--font-sans);
}

.submit-btn:hover {
  background: #555;
}

.footer-content {
  text-align: center;
}

.privacy-note {
  color: #666;
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
}

.social-link {
  color: #666;
  transition: color 0.2s ease;
}

.social-link:hover {
  color: #333;
}

.apps {
  list-style: none;
  padding: 0;
  margin: 0 auto;
  text-align: left;
  max-width: fit-content;
}

.apps li {
  margin-bottom: 0.5rem;
}

a {
  color: #0066cc;
  text-decoration: underline;
}

a:hover {
  color: #0052a3;
  text-decoration-thickness: 2px;
}

.attributions {
  display: block;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid #ddd;
  color: #999;
}

.attributions p {
  margin: 0.25rem 0;
  font-size: 0.75rem;
}

@keyframes confetti {
  to {
    transform: translate(
      calc(var(--x) * 1px),
      calc(var(--y) * 1px)
    ) rotate(calc(var(--r) * 1deg));
    opacity: 0;
  }
}