/* ==========================================================================
   ALTERNATE — Shared Design System
   Single source of truth for palette, type, spacing and reusable components.
   Mobile-first: base rules target small screens; min-width queries scale up.
   ========================================================================== */

@import url("https://fonts.googleapis.com/css2?family=Lato:wght@400;700;900&family=Poppins:wght@500;600;700;800&family=VT323&display=swap");

/* --------------------------------------------------------------------------
   1. Design tokens
   -------------------------------------------------------------------------- */
:root {
  /* Brand + semantic color */
  --color-primary: #ad0109;
  --color-primary-strong: #8a0107;
  --color-primary-hover: #e3000e;
  --color-secondary: #005aa0;
  --color-secondary-strong: #004478;
  --color-accent: #e3000e;
  --color-accent-soft: #fdecec;
  --color-success: #1a7f37;
  --color-warning: #b26a00;
  --color-danger: #ad0109;

  /* Surfaces */
  --color-bg: #ffffff;
  --color-surface: #f8f8f8;
  --color-surface-raised: #ffffff;
  --color-surface-dark: #001424;

  /* Lines */
  --color-border: #dddddd;
  --color-border-strong: #b9b9b9;

  /* Text */
  --color-text: #001424;
  --color-text-muted: #4a5a68;
  --color-text-inverse: #ffffff;
  --color-link: #005aa0;

  /* Typography */
  --font-display: "Poppins", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-body: "Lato", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "VT323", "Courier New", ui-monospace, monospace;

  --fs-h1: clamp(2rem, 1.35rem + 3.1vw, 3.25rem);
  --fs-h2: clamp(1.5rem, 1.15rem + 1.9vw, 2.25rem);
  --fs-h3: clamp(1.25rem, 1.08rem + 0.85vw, 1.625rem);
  --fs-h4: clamp(1.125rem, 1.03rem + 0.45vw, 1.25rem);
  --fs-body: 1rem;
  --fs-small: 0.8125rem;
  --fs-xs: 0.75rem;
  --fs-price: 1.375rem;
  --fs-display: clamp(1.25rem, 1rem + 1.4vw, 1.75rem);

  --lh-tight: 1.15;
  --lh-snug: 1.3;
  --lh-normal: 1.55;

  --fw-regular: 400;
  --fw-bold: 700;
  --fw-black: 900;
  --fw-heading: 700;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 2.5rem;
  --space-8: 3rem;
  --space-10: 4rem;
  --space-12: 5rem;
  --space-16: 7rem;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-pill: 999px;

  /* Elevation */
  --shadow-sm: 0 1px 2px rgba(0, 20, 36, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 20, 36, 0.1);
  --shadow-lg: 0 12px 32px rgba(0, 20, 36, 0.14);

  /* Layout */
  --container-max: 1240px;
  --container-pad: var(--space-4);
  --header-height: 64px;
  --focus-ring: 0 0 0 3px rgba(0, 90, 160, 0.45);

  --transition-fast: 120ms ease;
  --transition-base: 200ms ease;
}

/* --------------------------------------------------------------------------
   2. Base / reset
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img,
picture,
svg,
video {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 var(--space-3);
  font-family: var(--font-display);
  font-weight: var(--fw-heading);
  line-height: var(--lh-tight);
  color: var(--color-text);
}

h1 {
  font-size: var(--fs-h1);
  letter-spacing: -0.02em;
}

h2 {
  font-size: var(--fs-h2);
  letter-spacing: -0.015em;
}

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

h4 {
  font-size: var(--fs-h4);
}

p {
  margin: 0 0 var(--space-4);
}

ul,
ol {
  margin: 0 0 var(--space-4);
  padding-left: var(--space-5);
}

:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-sm);
}

/* --------------------------------------------------------------------------
   3. Layout primitives
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.container-wide {
  width: 100%;
  max-width: 1600px;
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section {
  padding-block: var(--space-8);
}

.section-surface {
  background-color: var(--color-surface);
}

.section-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  margin: 0;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}

.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}

.flex {
  display: flex;
  gap: var(--space-4);
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.flex-wrap {
  flex-wrap: wrap;
}

.stack > * + * {
  margin-top: var(--space-4);
}

/* --------------------------------------------------------------------------
   4. Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.625rem 1.125rem;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  background-color: transparent;
  font-family: var(--font-display);
  font-size: var(--fs-small);
  font-weight: var(--fw-bold);
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--transition-fast),
    border-color var(--transition-fast), color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.btn:hover {
  text-decoration: none;
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
}

.btn-secondary {
  background-color: var(--color-surface-raised);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-secondary:hover {
  background-color: var(--color-accent-soft);
  border-color: var(--color-primary-hover);
  color: var(--color-primary-strong);
}

.btn-ghost {
  background-color: transparent;
  border-color: var(--color-border-strong);
  color: var(--color-text);
}

.btn-ghost:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: var(--fs-xs);
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: var(--fs-body);
}

/* --------------------------------------------------------------------------
   5. Cards
   -------------------------------------------------------------------------- */
.card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition-base),
    border-color var(--transition-base), transform var(--transition-base);
}

.card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
}

.card-media {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1 / 1;
  padding: var(--space-4);
  background-color: var(--color-surface);
}

.card-media img {
  max-height: 100%;
  object-fit: contain;
}

.card-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  flex: 1;
}

.card-title {
  font-family: var(--font-display);
  font-size: var(--fs-h4);
  font-weight: var(--fw-heading);
  line-height: var(--lh-snug);
  margin: 0;
}

.card-title a {
  color: var(--color-text);
}

.card-title a:hover {
  color: var(--color-primary);
}

.card-text {
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--fs-small);
}

.card-specs {
  margin: 0;
  padding-left: var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--fs-small);
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4);
  border-top: 1px solid var(--color-border);
  margin-top: auto;
}

.card-price {
  font-family: var(--font-display);
  font-size: var(--fs-price);
  font-weight: var(--fw-bold);
  color: var(--color-primary);
}

.card-price-old {
  font-size: var(--fs-small);
  font-weight: var(--fw-regular);
  color: var(--color-text-muted);
  text-decoration: line-through;
}

/* --------------------------------------------------------------------------
   6. Badges, labels & form controls
   -------------------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  font-family: var(--font-display);
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.badge-new {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.badge-sale {
  background-color: var(--color-accent-soft);
  border-color: var(--color-accent);
  color: var(--color-primary);
}

.badge-guide {
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
  color: var(--color-text-inverse);
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.label {
  font-size: var(--fs-small);
  font-weight: var(--fw-bold);
  color: var(--color-text);
}

.input,
.select,
.textarea {
  width: 100%;
  padding: 0.625rem 0.75rem;
  background-color: var(--color-surface-raised);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.input:focus,
.select:focus,
.textarea:focus {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: var(--focus-ring);
}

/* --------------------------------------------------------------------------
   7. Site header / navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.utility-bar {
  background-color: var(--color-surface-dark);
  color: var(--color-text-inverse);
  font-size: var(--fs-xs);
}

.utility-bar .container-wide {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 34px;
  flex-wrap: wrap;
}

.utility-bar a {
  color: var(--color-text-inverse);
  opacity: 0.85;
}

.utility-bar a:hover {
  color: var(--color-text-inverse);
  opacity: 1;
  text-decoration: underline;
}

.utility-links {
  display: flex;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.header-main {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.header-main .container-wide {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  min-height: var(--header-height);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--color-text-inverse);
  white-space: nowrap;
}

.site-brand:hover {
  color: var(--color-text-inverse);
  text-decoration: none;
}

.site-brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background-color: var(--color-text-inverse);
  color: var(--color-primary);
  font-size: 1rem;
  font-weight: 900;
}

.site-search {
  display: flex;
  flex: 1;
  align-items: center;
  min-width: 0;
}

.site-search input {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1px solid transparent;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  background-color: var(--color-surface-raised);
  color: var(--color-text);
}

.site-search input:focus {
  outline: none;
  box-shadow: var(--focus-ring);
}

.site-search .btn {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
  color: var(--color-text-inverse);
}

.site-search .btn:hover {
  background-color: var(--color-secondary-strong);
  border-color: var(--color-secondary-strong);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
}

.icon-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.5rem 0.625rem;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: var(--radius-md);
  background-color: transparent;
  color: var(--color-text-inverse);
  font-size: var(--fs-small);
  font-weight: var(--fw-bold);
  cursor: pointer;
  transition: background-color var(--transition-fast),
    border-color var(--transition-fast);
}

.icon-btn:hover {
  background-color: rgba(255, 255, 255, 0.14);
  border-color: var(--color-text-inverse);
  color: var(--color-text-inverse);
  text-decoration: none;
}

.cart-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: var(--radius-pill);
  background-color: var(--color-text-inverse);
  color: var(--color-primary);
  font-size: 11px;
  font-weight: 900;
  line-height: 1;
}

.nav-toggle-checkbox {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.5rem 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: var(--radius-md);
  background-color: transparent;
  color: var(--color-text-inverse);
  font-family: var(--font-display);
  font-size: var(--fs-small);
  font-weight: var(--fw-bold);
  cursor: pointer;
}

.nav-toggle-bars {
  display: inline-block;
  width: 18px;
  height: 2px;
  background-color: currentColor;
  box-shadow: 0 5px 0 currentColor, 0 -5px 0 currentColor;
}

.site-nav {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.nav-list {
  display: none;
  flex-direction: column;
  gap: var(--space-1);
  list-style: none;
  margin: 0;
  padding: var(--space-3) 0;
}

.nav-toggle-checkbox:checked ~ .site-nav .nav-list {
  display: flex;
}

.nav-link {
  display: block;
  padding: 0.625rem 0.5rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: var(--fs-small);
  font-weight: var(--fw-bold);
  color: var(--color-text);
}

.nav-link:hover {
  background-color: var(--color-surface);
  color: var(--color-primary);
  text-decoration: none;
}

.nav-link.is-active {
  color: var(--color-primary);
}

.nav-link.is-highlight {
  color: var(--color-primary);
}

.nav-link.is-highlight::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: var(--space-2);
  border-radius: var(--radius-pill);
  background-color: var(--color-primary);
  vertical-align: middle;
}

/* --------------------------------------------------------------------------
   8. Site footer
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--color-surface-dark);
  color: var(--color-text-inverse);
  margin-top: var(--space-8);
  padding-top: var(--space-8);
  font-size: var(--fs-small);
}

.site-footer a {
  color: rgba(255, 255, 255, 0.78);
}

.site-footer a:hover {
  color: var(--color-text-inverse);
  text-decoration: underline;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  padding-bottom: var(--space-8);
}

.footer-col {
  min-width: 0;
}

.footer-heading {
  font-family: var(--font-display);
  font-size: var(--fs-small);
  font-weight: var(--fw-bold);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-inverse);
  margin: 0 0 var(--space-3);
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-tagline {
  max-width: 34ch;
  color: rgba(255, 255, 255, 0.7);
  margin: var(--space-3) 0;
}

.footer-contact {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  color: rgba(255, 255, 255, 0.78);
}

.social-links {
  display: flex;
  gap: var(--space-2);
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-pill);
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
}

.social-links a:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
  text-decoration: none;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  padding-block: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  align-items: center;
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
}

.footer-bottom-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

/* --------------------------------------------------------------------------
   9. Utilities
   -------------------------------------------------------------------------- */
.text-center {
  text-align: center;
}

.text-muted {
  color: var(--color-text-muted);
}

.text-primary {
  color: var(--color-primary);
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -48px;
  z-index: 200;
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-md);
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  font-weight: var(--fw-bold);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-2);
  color: var(--color-text-inverse);
}

/* --------------------------------------------------------------------------
   10. Responsive scale-up
   -------------------------------------------------------------------------- */
@media (min-width: 600px) {
  :root {
    --container-pad: var(--space-5);
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

@media (min-width: 900px) {
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .grid {
    gap: var(--space-5);
  }

  .nav-toggle {
    display: none;
  }

  .site-nav .container-wide {
    display: flex;
    align-items: center;
  }

  .nav-list {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-1);
    padding: 0;
  }

  .nav-link {
    padding: 0.875rem 0.75rem;
    border-radius: 0;
    border-bottom: 3px solid transparent;
  }

  .nav-link:hover {
    background-color: transparent;
    border-bottom-color: var(--color-primary);
  }

  .nav-link.is-active {
    border-bottom-color: var(--color-primary);
  }

  .site-search {
    max-width: 520px;
  }

  .footer-grid {
    grid-template-columns: 2fr repeat(3, 1fr);
  }
}

@media (min-width: 1200px) {
  :root {
    --container-pad: var(--space-6);
  }

  .grid-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}