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

/* ===== CUSTOM PROPERTIES ===== */
:root {
  --yellow: #FFFF00;
  --black: #000000;
  --white: #ffffff;
  --font: 'Space Mono', monospace;
  --shadow: 8px 8px 0px 0px rgba(0, 0, 0, 1);
  --shadow-hover: 12px 12px 0px 0px rgba(0, 0, 0, 1);
  --shadow-nav: 4px 4px 0px 0px rgba(0, 0, 0, 1);
}

/* ===== BASE ===== */
html {
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background-color: var(--white);
  color: var(--black);
  min-height: 100vh;
}

::selection {
  background-color: var(--yellow);
  color: var(--black);
}

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

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

/* ===== NAV ===== */
.nav {
  border-bottom: 4px solid var(--black);
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--white);
  position: sticky;
  top: 0;
  z-index: 50;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.25rem 0.5rem;
  transition: background-color 0.15s, color 0.15s;
}

.nav-logo:hover {
  background-color: var(--black);
  color: var(--white);
}

.nav-links {
  display: flex;
  gap: 1rem;
  font-weight: 700;
  font-size: 1.125rem;
  text-transform: uppercase;
}

.nav-link {
  border: 2px solid var(--black);
  padding: 0.25rem 1rem;
  transition: background-color 0.15s, box-shadow 0.15s;
}

.nav-link:hover {
  background-color: var(--yellow);
  box-shadow: var(--shadow-nav);
}

/* ===== PAGE WRAPPER ===== */
.page {
  padding: 2rem;
}

/* ===== HERO HEADER (index) ===== */
.hero {
  border: 4px solid var(--black);
  padding: 1.5rem;
  margin-bottom: 3rem;
  box-shadow: var(--shadow);
  background-color: var(--white);
  max-width: 56rem;
  margin-left: auto;
  margin-right: auto;
}

.hero h1 {
  font-size: 2.25rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: -0.05em;
  line-height: 1.1;
}

.hero .subtitle {
  margin-top: 1rem;
  font-size: 1.25rem;
  font-weight: 700;
  text-transform: uppercase;
  background-color: var(--black);
  color: var(--white);
  display: inline-block;
  padding: 0.5rem;
}

.hero .disclaimer {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  font-weight: 400;
  font-style: italic;
}

.hero-counter {
  margin-top: 1rem;
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  background-color: var(--yellow);
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border: 2px solid var(--black);
}

/* ===== CONTROLS (sort + search + page info) ===== */
.controls {
  max-width: 72rem;
  margin: 0 auto 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.controls-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}

.controls-label {
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.875rem;
}

.sort-buttons {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.sort-btn {
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  background: var(--white);
  color: var(--black);
  border: 3px solid var(--black);
  padding: 0.4rem 0.75rem;
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s;
}

.sort-btn:hover {
  background-color: var(--yellow);
}

.sort-btn.active {
  background-color: var(--black);
  color: var(--white);
}

.lucky-btn {
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  background: var(--yellow);
  color: var(--black);
  border: 3px solid var(--black);
  padding: 0.4rem 0.75rem;
  cursor: pointer;
  box-shadow: var(--shadow-nav);
  transition: transform 0.15s, box-shadow 0.15s;
}

.lucky-btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px 0px rgba(0, 0, 0, 1);
}

.search-box {
  flex: 1;
  min-width: 0;
  max-width: 24rem;
}

.search-input {
  width: 100%;
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 700;
  padding: 0.5rem 0.75rem;
  border: 3px solid var(--black);
  background: var(--white);
  color: var(--black);
  outline: none;
  transition: box-shadow 0.15s;
}

.search-input::placeholder {
  color: #999;
  font-weight: 400;
}

.search-input:focus {
  box-shadow: var(--shadow-nav);
}

.page-info {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  white-space: nowrap;
}

/* ===== PAGINATION ===== */
.pagination {
  max-width: 72rem;
  margin: 2rem auto 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
}

.page-btn {
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 700;
  background: var(--white);
  color: var(--black);
  border: 3px solid var(--black);
  width: 2.75rem;
  height: 2.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s;
}

.page-btn:hover {
  background-color: var(--yellow);
}

.page-btn.active {
  background-color: var(--black);
  color: var(--white);
}

/* ===== PRODUCT GRID ===== */
.grid {
  max-width: 72rem;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

/* ===== PRODUCT CARD ===== */
.card {
  border: 4px solid var(--black);
  padding: 1.5rem;
  background-color: var(--white);
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: background-color 0.15s, box-shadow 0.15s, transform 0.15s;
}

.card:hover {
  background-color: var(--yellow);
  box-shadow: var(--shadow-hover);
  transform: translate(-1px, -1px);
}

.card-image-wrapper {
  width: 100%;
  height: 16rem;
  background-color: var(--white);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 4px solid var(--black);
  padding: 1rem;
  position: relative;
  overflow: hidden;
}

.card-image-wrapper img {
  max-height: 100%;
  max-width: 100%;
  object-fit: contain;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  width: 100%;
  border-bottom: 4px solid var(--black);
  padding-bottom: 0.5rem;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 4rem;
}

.card-footer {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.25rem;
  font-weight: 700;
  margin-top: auto;
  margin-bottom: 1rem;
}

.price-badge {
  background-color: var(--black);
  color: var(--white);
  padding: 0.25rem 0.75rem;
}

.card form {
  width: 100%;
}

.card-button {
  width: 100%;
  text-align: center;
  display: block;
  background-color: var(--black);
  color: var(--white);
  border: 4px solid var(--black);
  padding: 0.75rem 1rem;
  text-transform: uppercase;
  font-size: 1.125rem;
  font-weight: 700;
  font-family: var(--font);
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s;
}

.card-button:hover {
  background-color: var(--white);
  color: var(--black);
}

/* ===== ABOUT PAGE ===== */
.about {
  max-width: 48rem;
  margin: 0 auto;
}

.about-header {
  border: 4px solid var(--black);
  padding: 1.5rem;
  margin-bottom: 3rem;
  box-shadow: var(--shadow);
  background-color: var(--black);
  color: var(--white);
}

.about-header h1 {
  font-size: 2.25rem;
  font-weight: 900;
  text-transform: uppercase;
  color: var(--white);
  background-color: var(--black);
  padding: 1rem;
  display: inline-block;
  transform: rotate(-1deg);
  box-shadow: 8px 8px 0px 0px var(--yellow);
}

.about-content {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  font-size: 1.25rem;
}

.about-block {
  padding: 1.5rem;
  border: 4px solid var(--black);
  box-shadow: var(--shadow);
}

.about-block--white {
  background-color: var(--white);
}

.about-block--yellow {
  background-color: var(--yellow);
  font-weight: 700;
}

.faq {
  padding: 1.5rem;
  border: 4px solid var(--black);
  background-color: var(--black);
  color: var(--white);
  margin-top: 1rem;
}

.faq h2 {
  font-size: 1.875rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 1rem;
  color: var(--yellow);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.faq-list h3 {
  font-weight: 700;
  font-size: 1.5rem;
  text-transform: uppercase;
}

/* ===== HOW-IT-WORKS PAGE ===== */
.how-header {
  border: 4px solid var(--black);
  padding: 1.5rem;
  margin-bottom: 3rem;
  box-shadow: var(--shadow);
  background-color: var(--white);
  max-width: 56rem;
  margin-left: auto;
  margin-right: auto;
}

.how-header h1 {
  font-size: 2.25rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: -0.05em;
}

.how-header .subtitle {
  margin-top: 1rem;
  font-size: 1.25rem;
  font-weight: 700;
  text-transform: uppercase;
  background-color: var(--yellow);
  color: var(--black);
  display: inline-block;
  padding: 0.5rem;
  border: 2px solid var(--black);
}

.how-content {
  max-width: 56rem;
  margin: 0 auto;
}

.steps {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.step {
  border: 4px solid var(--black);
  padding: 1.5rem;
  background-color: var(--white);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: center;
}

.step-number {
  font-size: 6rem;
  font-weight: 900;
  color: var(--black);
  text-shadow: 4px 4px 0px var(--yellow);
  line-height: 1;
}

.step h2 {
  font-size: 1.5rem;
  font-weight: 700;
  text-transform: uppercase;
  border-bottom: 4px solid var(--black);
  padding-bottom: 0.5rem;
  margin-bottom: 0.5rem;
}

.step p, .step-substeps p {
  font-size: 1.125rem;
}

.step-substeps {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.step-substeps .highlight {
  background-color: var(--yellow);
  padding: 0 0.25rem;
  text-transform: uppercase;
  font-weight: 700;
}

.step-substeps .bold {
  font-weight: 700;
}

/* Bottom buttons */
.how-buttons {
  margin-top: 3rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  justify-content: center;
}

.btn-back {
  text-align: center;
  font-weight: 700;
  font-size: 1.25rem;
  text-transform: uppercase;
  border: 4px solid var(--black);
  padding: 1rem 2rem;
  background-color: var(--white);
  transition: background-color 0.15s;
}

.btn-back:hover {
  background-color: var(--yellow);
}

.btn-amazon {
  text-align: center;
  font-weight: 700;
  font-size: 1.25rem;
  text-transform: uppercase;
  border: 4px solid var(--black);
  padding: 1rem 2rem;
  background-color: var(--black);
  color: var(--white);
  transition: background-color 0.15s, color 0.15s;
}

.btn-amazon:hover {
  background-color: var(--yellow);
  color: var(--black);
}

/* ===== FOOTER ===== */
.site-footer {
  margin-top: 4rem;
  padding: 2rem 1rem;
  text-align: center;
  font-size: 0.7rem;
  color: #ccc;
  letter-spacing: 0.05em;
}

.site-footer a {
  color: #ccc;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.site-footer a:hover {
  color: var(--black);
  border-bottom-color: var(--black);
}

/* ===== RESPONSIVE ===== */
@media (min-width: 768px) {
  .hero h1 {
    font-size: 3.75rem;
    line-height: 1.15;
  }

  .hero .subtitle {
    font-size: 1.5rem;
  }

  .grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .step {
    flex-direction: row;
  }

  .how-buttons {
    flex-direction: row;
  }

  .about-header h1 {
    font-size: 3.75rem;
  }

  .how-header h1 {
    font-size: 3rem;
  }
}

@media (min-width: 1024px) {
  .grid {
    grid-template-columns: repeat(3, 1fr);
  }
}