:root {
  /* Colors */
  --clr-primary: #755fc1;
  --clr-primary-hover: #5b3d9a;
  --clr-text: #140b16;
  --clr-text-dark: #000000;
  --clr-white: #fff;
  --clr-bg-subtle: hsl(237, 80%, 98%);
  --clr-star: #7ad1eb;
  --clr-shadow: rgba(0, 0, 0, 0.1);

  --clr-badge-sold-out: #ff4757;
  --clr-badge-low: #ffb501;

  /* Font sizes */
  --fs--2: 0.825rem;
  --fs--1: 0.925rem;
  --fs-1: 1rem;
  --fs-2: 1.125rem;
  --fs-3: 1.25rem;
  --fs-4: 1.5rem;
  --fs-5: 2.5rem;
  --fs-6: 3.5rem;
}

@layer reset {
  * {
    box-sizing: border-box;
  }

  body {
    margin: 0;
    line-height: 1.5;
  }

  h1,
  h2,
  h3,
  h4 {
    line-height: 1.1;
  }

  h1,
  h2,
  h3,
  h4,
  h5,
  h6,
  p,
  ol,
  ul {
    margin-block: 0;
  }

  input,
  button,
  textarea,
  select {
    font-family: inherit;
    font-size: inherit;
  }

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

  @keyframes snap-grow {
    0%,
    100% {
      scale: 0.75;
      opacity: 0.5;
    }
    40%,
    60% {
      scale: 1;
      opacity: 1;
    }
  }
}

@layer base {
  body {
    font-family: system-ui;
    color: var(--clr-text);
  }

  h1,
  h2,
  h3 {
    line-height: 1.1;
  }

  h1 {
    font-size: var(--fs-6);
    color: var(--clr-primary);
  }

  h1 + p {
    font-size: var(--fs-4);
  }

  h2 {
    font-size: var(--fs-4);
  }

  h3 {
    font-size: var(--fs-3);
  }
}

@layer layout {
  .wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
  }

  .product-area {
    display: grid;
    gap: 1rem;
  }

  /* header */

  .site-header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 1rem;
    padding: 2rem 0;
    border-bottom: 1px solid var(--clr-bg-subtle);
  }

  .main-nav ul {
    list-style: '';
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
  }

  .main-nav a {
    color: inherit;
    text-decoration: none;
    font-weight: 500;
  }

  .main-nav a:hover,
  .main-nav a:focus {
    color: var(--clr-primary);
  }

  /* hero */

  .hero {
    display: grid;
    gap: 1rem;
    padding-top: 3rem;
    padding-bottom: 3rem;
  }
}

/* newsletter signup */
@layer components {
  @scope (.newsletter) {
    & {
      padding: 1rem;
      border-radius: 12px;
      background: var(--clr-bg-subtle);
      border: 3px solid;
      max-width: 500px;
      margin: 0 auto;
      box-shadow: 0 0 24px var(--clr-shadow);
      opacity: 0;
      translate: 0 100vh;
      transition-property: all;
      transition-duration: 1s;
      transition-behavior: allow-discrete;

      &[open] {
        opacity: 1;
        translate: 0 20vh;

        &::backdrop {
          background: rgba(0, 0, 0, 0.5);
          opacity: 1;
          transition: opacity 0.3s ease;
        }

        @starting-style {
          opacity: 0;
          translate: 0 -20vh;

          &::backdrop {
            opacity: 0;
          }
        }
      }
    }

    .close-button {
      position: absolute;
      top: 8px;
      right: 8px;
      background: transparent;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
    }

    .newsletter-form {
      display: grid;
      gap: 0.5rem;
    }

    .form-group {
      display: grid;
    }

    input {
      padding: 0.25rem 0.5rem;
    }

    button {
      justify-self: start;
    }
  }

  #toast {
    position: fixed;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--clr-primary);
    color: var(--clr-white);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px var(--clr-shadow);
    opacity: 0;
    transition-property: opacity;
    transition-duration: 0.5s;
    transition-timing-function: ease-in-out;
    transition-behavior: allow-discrete;

    &:popover-open {
      opacity: 1;
      transition-delay: 0s, 2s; /* Show immediately, hide after 2s */

      @starting-style {
        opacity: 0;
      }
    }

    &.success {
      background: #2ed573;
    }

    &.error {
      background: var(--clr-badge-sold-out);
    }
  }

  /* promo banner */

  .promo-banner {
    background: var(--clr-primary);
    padding: 0.25rem 2rem;
    color: var(--clr-white);

    .badge {
      background-color: var(--clr-primary-hover);
    }
  }
}

@layer layout {
  .shop-layout {
    display: grid;
    gap: 1rem;
    @media (width > 48em) {
      grid-template-columns: 200px 1fr;
    }
  }

  .sidebar-section {
    display: grid;
    gap: 1rem;
    background: var(--clr-bg-subtle);
    padding: 1rem;
    border-radius: 12px;
    container-type: inline-size;
    container-name: sidebar-section;
  }

  .sidebar-section + .sidebar-section {
    margin-block-start: 1rem;
  }

  @property --left-fade {
    syntax: "<length>";
    inherits: false;
    initial-value: 0;
  }

  @property --right-fade {
    syntax: "<length>";
    inherits: false;
    initial-value: 0;
  }

  @keyframes scrollfade {
    0% {
      --left-fade: 0;
    }
    10%, 100% {
      --left-fade: 3rem;
    }
    0%, 90% {
      --right-fade: 3rem;
    }
    100% {
      --right-fade: 0;
    }
  }

  .featured-products {
    display: grid;
    gap: 1rem;
    grid-auto-flow: column;
    grid-auto-columns: minmax(200px, 1fr);
    overflow-x: scroll;
    scroll-snap-type: inline mandatory;

    mask: linear-gradient(to right,
      #0000,
      #ffff var(--left-fade) calc(100% - var(--right-fade)),
      #0000
    );
    animation: scrollfade;
    animation-timeline: --scrollfade;
    scroll-timeline: --scrollfade x;

    > * {
      scroll-snap-align: center;

      @supports (animation-timeline: view(inline)) {
        animation: snap-grow linear both;
        animation-timeline: view(inline);
      }
    }
  }
}

@layer components {
  .filters {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
  }

  .filter {
    display: grid;
    gap: 0.25rem;
  }

  /* badges */
  .badge {
    background: var(--clr-primary);
    color: var(--clr-white);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: var(--fs--2);
    font-weight: 600;
    text-transform: uppercase;
  }
}

@layer layout {
  /* product grid */
  .product-grid {
    --min-cell-size: 200px;

    display: grid;
    grid-template-columns: repeat(
      auto-fill,
      minmax(min(var(--min-cell-size), 100%), 1fr)
    );
    gap: 1rem;
  }
}

@layer components {
  /* promotions list */
  .promo-list {
    list-style: '';
    margin: 0;
    padding: 0;

    display: grid;
    gap: 1rem;

    font-size: var(--fs--2);

    @container sidebar-section (width > 30em) {
      grid-template-columns: repeat(auto-fit, minmax(min(100px, 100%), 1fr));
    }
  }

  .promo-list li {
    corner-shape: scoop;
    display: flex;
    flex-direction: column;
    text-align: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--white);
    border: 1px dashed var(--clr-primary);
    border-radius: 8px;
    font-size: var(--fs--2);
    line-height: 1.2;
    color: var(--clr-text-dark);
  }

  .promo-list .badge {
    text-align: center;
    font-family: monospace;
    letter-spacing: 0.05em;
  }

  /* cards */

  @scope (.product) {
    & {
      display: grid;
      background: var(--clr-white);
      border-radius: 9px;
      grid-template-rows: subgrid;
      gap: 0;
      grid-row: span 3;
      box-shadow: 0 2px 8px var(--clr-shadow);
      overflow: hidden;
      position: relative;
      container-type: inline-size;
      container-name: product-card;
    }

    &[data-stock='low'] {
      .badge {
        background: var(--clr-badge-low);
        color: var(--clr-text-dark);
      }
    }

    &[data-stock='sold-out'] {
      .badge {
        background: var(--clr-badge-sold-out);
      }
    }

    .image {
      width: 100%;
      aspect-ratio: 2 / 1;
      object-fit: cover;
    }

    .badge {
      position: absolute;
      top: 8px;
      right: 8px;

      &:empty {
        display: none;
      }
    }

    .content {
      padding: 1rem;
    }

    .name {
      font-size: var(--fs-2);
      font-weight: 600;
      margin-block: 0 0.5rem;
      color: var(--clr-text);
    }

    .rating {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 4px;
      margin-bottom: 12px;
    }

    .stars {
      --star-size: 15px;
      --rating: round(calc((var(--stars) / 5) * 100%), 10%);

      inline-size: calc(var(--star-size) * 5 + (var(--star-size) / 2));
      height: var(--star-size);
      background: linear-gradient(
        90deg,
        var(--clr-star) 0%,
        var(--clr-star) var(--rating),
        #d1d5db 0%,
        #d1d5db 100%
      );
      mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 576 512'%3E%3Cpath d='M259.3 17.8L194 150.2 47.9 171.5c-26.2 3.8-36.7 36.1-17.7 54.6l105.7 103-25 145.5c-4.5 26.3 23.2 46 46.4 33.7L288 439.6l130.7 68.7c23.2 12.2 50.9-7.4 46.4-33.7l-25-145.5 105.7-103c19-18.5 8.5-50.8-17.7-54.6L382 150.2 316.7 17.8c-11.7-23.6-45.6-23.9-57.4 0z'/%3E%3C/svg%3E");
      mask-size: var(--star-size) var(--star-size);
      mask-repeat: space;
    }

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

    .footer {
      display: flex;
      flex-wrap: wrap;
      padding: 0 1rem 1rem;
      gap: 1rem;
      justify-content: space-between;
      align-items: center;
    }

    .price {
      font-size: var(--fs-3);
      font-weight: 700;
      color: var(--clr-text-dark);

      @container product-card (width < 300px) {
        width: 100%;
      }
    }
  }

  /* buttons */
  .button {
    background: var(--clr-primary);
    color: var(--clr-white);
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: var(--fs--2);
    font-weight: 600;
    transition: background 0.2s ease;
  }
}

@layer layout {
  /* site footer */
  .site-footer {
    padding-block: 3rem;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding-bottom: 2rem;
    border-bottom: 1px solid #2a2a2a;
  }

  .footer-brand .logo {
    color: #000;
    font-size: 1.25rem;
    font-weight: 700;
    text-decoration: none;
    display: inline-block;
    margin-bottom: 0.75rem;
  }

  .footer-brand p {
    font-size: 0.9rem;
    line-height: 1.6;
  }

  .footer-links h4 {
    color: #fff;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 1rem;
  }

  .footer-links ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }

  .footer-links a {
    color: inherit;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
  }

  .footer-bottom {
    max-width: 1200px;
    margin: 1.25rem auto 0;
    font-size: 0.8rem;
    text-align: center;
  }

  @media (max-width: 640px) {
    .footer-grid {
      grid-template-columns: 1fr 1fr;
    }

    .footer-brand {
      grid-column: 1 / -1;
    }
  }
}