@import url("https://fonts.googleapis.com/css2?family=Host+Grotesk:ital,wght@0,300..800;1,300..800&display=swap");

/* RESET & BASE */

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

li {
  list-style: none;
}

a,
span,
button,
input,
ion-icon,
img {
  display: block;
}

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

button,
input {
  border: none;
  background: none;
  font: inherit;
}

button {
  cursor: pointer;
}

input {
  width: 100%;
}

img {
  height: auto;
}

address {
  font-style: normal;
}

html {
  font-family: "Host Grotesk", serif;
}

body {
  background-color: var(--smokey-black);
  color: var(--silver-sand);
  line-height: 1.5;
  font-size: 18px;
}

/* Dark mode overrides */
body.dark-mode {
  --smokey-black: hsl(210, 30%, 12%);
  --eerie-black-1: hsl(210, 30%, 15%);
  --eerie-black-2: hsl(210, 30%, 18%);
  --onyx-1: hsl(210, 20%, 30%);
  --onyx-2: hsl(210, 20%, 25%);
  --silver-sand: hsl(210, 20%, 70%);
  --silver-metallic: hsl(210, 20%, 65%);
  --alice-blue: hsl(210, 15%, 85%);
  --white: hsl(0, 0%, 95%);
  --white_50: hsla(0, 0%, 95%, 0.5);
  --fiery-rose: hsl(0, 80%, 70%);
  --fiery-rose_12: hsla(0, 80%, 70%, 0.12);
}


/* Prevent scroll when nav is open */
body.active {
  overflow: hidden;
}

:focus-visible {
  outline-offset: 4px;
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background-color: hsl(0, 0%, 98%);
}

::-webkit-scrollbar-thumb {
  background-color: hsl(0, 0%, 80%);
}

::-webkit-slider-thumb:hover {
  background-color: hsl(0, 0%, 70%);
}

/* VARIABLES */

:root {
  /* Colors */
  --ultramarine-blue: hsl(222, 100%, 55%);
  --silver-metallic: hsl(240, 4%, 71%);
  --fiery-rose_12: hsla(354, 86%, 65%, 0.12);
  --eerie-black-1: hsl(0, 0%, 13%);
  --eerie-black-2: hsl(0, 0%, 12%);
  --smokey-black: hsl(40, 100%, 2%);
  --silver-sand: hsl(240, 4%, 76%);
  --ocean-green: hsl(161, 50%, 57%);
  --fiery-rose: hsl(354, 86%, 65%);
  --alice-blue: hsl(214, 32%, 91%);
  --davys-gray: hsl(0, 0%, 34%);
  --blue-ryb: hsl(222, 100%, 45%);
  --white_50: hsla(0, 0%, 100%, 0.5);
  --white: hsl(0, 0%, 100%);
  --onyx-1: hsl(0, 0%, 23%);
  --onyx-2: hsl(0, 0%, 20%);

  /* Typography */
  --fs-1: calc(2.3rem + 2.1vw);
  --fs-2: calc(2.1rem + 0.9vw);
  --fs-3: calc(2rem + 0.3vw);
  --fs-4: 2rem;
  --fs-5: 1.8rem;
  --fs-6: 1.5rem;
  --fs-7: 1.4rem;
  --fs-8: 1.3rem;
  --fs-9: 1.2rem;

  /* Spacing */
  --section-padding: 120px;

  /* Box shadow */
  --shadow: 0 10px 30px hsla(0, 0%, 0%, 0.1);

  /* Transition */
  --transition: 0.25s ease;
  --cubic-in: cubic-bezier(0.51, 0.03, 0.64, 0.28);
  --cubic-out: cubic-bezier(0.33, 0.85, 0.4, 0.96);

  /* Border radius */
  --radius-pill: 500px;
  --radius-circle: 50%;
  --radius-5: 5px;
  --radius-8: 8px;
  --radius-16: 16px;
}

/* REUSED STYLE */

.container {
  padding-inline: 16px;
}

.h1,
.h2,
.h3 {
  color: var(--white);
  line-height: 1.2;
}

.h1 {
  font-weight: 700;
  font-size: var(--fs-1);
}

.h2 {
  font-size: var(--fs-2);
}

.h3 {
  font-size: var(--fs-5);
}

.btn-wrapper {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 15px;
}

.btn {
  font-weight: 500;
  color: var(--white);
  max-width: max-content;
  padding: 13px 28px;
}

.btn-primary {
  background-color: var(--ultramarine-blue);
  font-size: var(--fs-9);
  border-radius: var(--radius-pill);
  transition: var(--transition);
}

.btn-primary:is(:hover, :focus-visible) {
  background-color: var(--blue-ryb);
}

.w-100 {
  width: 100%;
}

.section {
  padding-block: var(--section-padding);
}

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

.section-title {
  margin-block-end: 24px;
}

.grid-list {
  display: grid;
  gap: 30px;
}

.bg-gray {
  background-color: var(--eerie-black-1);
}

.btn-link {
  display: flex;
  align-items: center;
  gap: 5px;
  font-weight: 500;
  color: var(--white);
  font-size: var(--fs-9);
}

.btn-link>* {
  transition: var(--transition);
}

.btn-link:is(:hover, :focus-visible) {
  color: var(--ultramarine-blue);
}

.btn-link:is(:hover, :focus-visible) ion-icon {
  transform: translateX(5px);
}

/* HEADER */

.header .btn-wrapper {
  display: none;
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding-block: 20px;
  background-color: var(--smokey-black);
  transition: var(--transition);
  z-index: 4;
}

.header.active {
  background-color: var(--eerie-black-2);
  box-shadow: var(--shadow);
  padding-block: 16px;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-open-btn {
  font-size: 30px;
  color: var(--white_50);
  transition: var(--transition);
}

.nav-open-btn:is(:hover, :focus-visible) {
  color: var(--ultramarine-blue);
}

/* FIXED NAVBAR TOGGLE: slide in/out from right */

.navbar {
  position: fixed;
  top: 0;
  right: 0;
  /* position at right edge */
  max-width: 400px;
  width: 100%;
  height: 100vh;
  padding: 20px;
  background-color: var(--eerie-black-1);
  transform: translateX(100%);
  /* hide off-screen right */
  transition: transform 0.25s var(--cubic-in);
  visibility: hidden;
  z-index: 5;
}

.navbar.active {
  transform: translateX(0);
  /* slide in */
  transition: transform 0.5s var(--cubic-out);
  visibility: visible;
}

.navbar-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-block-end: 30px;
}

.nav-close-btn {
  font-size: 30px;
  color: var(--fiery-rose);
  background-color: var(--fiery-rose_12);
  padding: 5px;
  border-radius: var(--radius-circle);
}

.navbar-link {
  font-size: 18px;
  transition: var(--transition);
  padding: 8px 16px;
}

.navbar-link:is(:hover, :focus-visible) {
  color: var(--ultramarine-blue);
}

/* Overlay */

.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: var(--smokey-black);
  transition: var(--transition);
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
  z-index: 4;
}

.overlay.active {
  opacity: 0.75;
  pointer-events: all;
  visibility: visible;
}

/* HERO */

.hero {
  padding-block-start: calc(var(--section-padding) + 50px);
}

.hero .container {
  display: grid;
  gap: 70px;
}

.hero-text {
  margin-block: 10px 50px;
}

.play-btn {
  font-size: var(--fs-9);
  display: flex;
  font-weight: 500;
  align-items: center;
  gap: 10px;
}

.play-btn .icon {
  width: 50px;
  height: 50px;
  display: grid;
  place-items: center;
  border: 2px solid var(--white);
  border-radius: var(--radius-circle);
  transition: var(--transition);
}

.play-btn .span {
  color: var(--silver-metallic);
  transition: var(--transition);
}

.play-btn:is(:hover, :focus-visible) .icon {
  background-color: var(--white);
  color: var(--ultramarine-blue);
}

.play-btn:is(:hover, :focus-visible) .span {
  color: var(--white);
}

/* PROMO */

.promo .section-text {
  padding-inline: 8px;
  margin-block-end: 50px;
}

.promo-card {
  padding: 25px;
  border-radius: var(--radius-5);
}

.promo-card .card-icon {
  padding: 20px;
  font-size: 25px;
  border-radius: var(--radius-circle);
  background-color: var(--onyx-1);
  color: var(--white);
  width: max-content;
  margin-block-end: 20px;
}

.promo-card .card-text {
  color: var(--alice-blue);
  margin-block: 20px 16px;
}

/* STATS */

.stats .container {
  display: grid;
  gap: 50px;
}

.stats .section-text:last-of-type {
  margin-block: 16px;
}

.stats-list {
  display: grid;
  gap: 15px;
}

.stats-card {
  padding: 18px;
  border-radius: var(--radius-5);
}

.stats-card .card-title {
  font-size: var(--fs-7);
  margin-block-end: 10px;
}

.stats-card .card-text {
  color: var(--alice-blue);
  font-size: 14px;
}

/* CTA */

.cta .btn-primary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  margin-inline: auto;
  margin-block-start: 30px;
}

/* INSTRUCTION */

.instruction .section-text {
  margin-block-end: 50px;
}

.instruction-card {
  padding: 25px;
  border-radius: var(--radius-8);
}

.instruction-card .card-icon {
  width: 50px;
  height: 50px;
  background-color: var(--smokey-black);
  border-radius: var(--radius-circle);
  display: grid;
  place-items: center;
  margin-block-end: 15px;
}

/* DOWNLOAD */

.app-card {
  padding: 25px;
  border-radius: var(--radius-16);
  display: grid;
  gap: 50px;
}

.app-card .section-text {
  margin-block-end: 25px;
}

.app-card .btn-primary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-block: 10px;
  border: 2px solid var(--ultramarine-blue);
}

.app-card .btn-primary:is(:hover, :focus-visible) {
  background-color: transparent;
}

.app-card .btn-primary ion-icon {
  font-size: 25px;
}

.app-card .btn-primary .btn-title {
  font-size: 15px;
  font-weight: 400;
}

/* FOOTER */

.footer {
  text-align: center;
  color: var(--alice-blue);
}

.footer .logo {
  max-width: max-content;
  margin-inline: auto;
  margin-block-end: 30px;
}

.footer-list {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 30px;
  margin-block: 50px;
}

.footer-link {
  color: var(--white);
  padding-block: 4px;
  border-block-end: 2px solid transparent;
  transition: var(--transition);
}

.footer-link:is(:hover, :focus-visible) {
  border-color: var(--ultramarine-blue);
}

.social-list-title {
  font-size: var(--fs-3);
  font-weight: 700;
  margin-block-end: 24px;
}

.social-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.social-link {
  padding: 16px;
  font-size: 18px;
  background-color: var(--eerie-black-1);
  color: var(--white);
  border-radius: var(--radius-circle);
  transition: var(--transition);
}

.social-link:is(:hover, :focus-visible) {
  background-color: var(--ultramarine-blue);
}

.footer-bottom {
  padding-block: 16px;
  border-block-start: 1px solid var(--eerie-black-2);
}

.copyright {
  margin-block-end: 16px;
  line-height: 1.3;
}

.footer-bottom-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
}

/* RESPONSIVE BREAKPOINTS */

@media (min-width: 575px) {
  .container {
    max-width: 545px;
    width: 100%;
    margin-inline: auto;
  }

  .app-card .card-banner {
    max-width: max-content;
    margin-inline: auto;
  }
}

@media (min-width: 768px) {
  .container {
    max-width: 720px;
  }

  .grid-list {
    grid-template-columns: 1fr 1fr;
  }

  .header .btn-wrapper {
    display: flex;
    margin-inline: auto 30px;
  }

  .ghost-btn {
    font-size: var(--fs-9);
    color: var(--alice-blue);
    transition: var(--transition);
  }

  .ghost-btn:is(:hover, :focus-visible) {
    color: var(--ultramarine-blue);
  }

  /* STATS */
  .stats .stats-list {
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
  }

  /* DOWNLOAD */
  .app-card {
    padding: 50px;
  }

  /* FOOTER */
  .footer-bottom {
    padding-block: 25px;
  }

  .footer-bottom .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .copyright {
    margin-block-end: 0;
  }
}

@media (min-width: 920px) {
  .container {
    max-width: 960px;
  }

  .grid-list {
    grid-template-columns: repeat(3, 1fr);
  }

  :is(.section-title, .section-text).text-center {
    margin-inline: auto;
  }

  .section-title.text-center {
    max-width: 60ch;
  }

  .section-text.text-center {
    max-width: 30ch;
  }

  .hero .container {
    grid-template-columns: 0.8fr 1fr;
    align-items: center;
    gap: 25px;
  }

  .stats .container {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }

  .app-card {
    grid-template-columns: 1fr 1fr;
  }

  .footer-top .container {
    max-width: 580px;
  }

  .footer-list {
    column-gap: 50px;
  }
}

@media (min-width: 1200px) {
  .container {
    max-width: 1140px;
  }

  /* Hide mobile nav buttons on large screens */
  .nav-open-btn,
  .navbar-top {
    display: none;
  }

  /* Desktop navbar */
  .navbar {
    all: unset;
    display: block;
    margin-inline: auto;
    position: static;
    width: auto;
    height: auto;
    background: none;
    transform: none !important;
    visibility: visible !important;
    z-index: auto;
  }

  .navbar-list {
    display: flex;
  }

  .navbar-link {
    font-weight: 600;
  }

  .header .btn-wrapper {
    margin-inline: auto;
  }

  .instruction .grid-list {
    grid-template-columns: repeat(4, 1fr);
  }

  .app-card {
    padding-inline: 80px;
  }
}