:root {
  /*
  ==============================
  Variables
  ==============================
  */

  /* Color palette - industrial, professional */
  --color-background: #0f1418;           /* Deep, slightly blue-tinted charcoal */
  --color-surface: #181e24;              /* Main surface panels */
  --color-surface-alt: #1f262e;          /* Secondary surface panels */
  --color-surface-elevated: #222a33;     /* Cards / elevated blocks */

  --color-text: #f5f7fa;                 /* Primary text on dark background */
  --color-text-muted: #b0b7c3;           /* Secondary text */
  --color-text-soft: #8b93a0;            /* Tertiary / helper text */

  --color-primary: #1e4a7b;              /* Deep, reliable workshop blue */
  --color-primary-strong: #12365a;       /* Darker variant for hovers */
  --color-accent: #f7c948;               /* Safety yellow highlight */
  --color-accent-strong: #f0b429;        /* Deeper safety yellow for active */

  --color-success: #3ba55d;              /* Confirmation / availability */
  --color-warning: #f0b429;              /* Caution states */
  --color-danger: #e55353;               /* Errors / destructive actions */

  /* Neutral grays for UI structure */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2933;
  --gray-900: #121826;

  /* Borders / dividers */
  --color-border-subtle: rgba(255, 255, 255, 0.06);
  --color-border-strong: rgba(255, 255, 255, 0.14);

  /* Overlays */
  --color-overlay-soft: rgba(0, 0, 0, 0.4);
  --color-overlay-strong: rgba(0, 0, 0, 0.7);

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Inter", "Roboto", "Segoe UI", sans-serif;
  --font-heading: "Montserrat", system-ui, -apple-system, BlinkMacSystemFont, "Inter", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-md: 1rem;      /* 16px */
  --font-size-lg: 1.125rem;  /* 18px */
  --font-size-xl: 1.25rem;   /* 20px */
  --font-size-2xl: 1.5rem;   /* 24px */
  --font-size-3xl: 1.875rem; /* 30px */
  --font-size-4xl: 2.25rem;  /* 36px */
  --font-size-5xl: 3rem;     /* 48px */

  --line-height-tight: 1.1;
  --line-height-snug: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  /* Spacing scale (px converted to rem at base 16px) */
  --space-0: 0;
  --space-2: 0.125rem;  /* 2px */
  --space-4: 0.25rem;   /* 4px */
  --space-6: 0.375rem;  /* 6px */
  --space-8: 0.5rem;    /* 8px */
  --space-10: 0.625rem; /* 10px */
  --space-12: 0.75rem;  /* 12px */
  --space-16: 1rem;     /* 16px */
  --space-20: 1.25rem;  /* 20px */
  --space-24: 1.5rem;   /* 24px */
  --space-28: 1.75rem;  /* 28px */
  --space-32: 2rem;     /* 32px */
  --space-40: 2.5rem;   /* 40px */
  --space-48: 3rem;     /* 48px */
  --space-56: 3.5rem;   /* 56px */
  --space-64: 4rem;     /* 64px */
  --space-80: 5rem;     /* 80px */
  --space-96: 6rem;     /* 96px */

  /* Radius */
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-pill: 999px;

  /* Shadows - industrial but controlled, like workshop lighting */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 4px 8px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 8px 18px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 14px 28px rgba(0, 0, 0, 0.5);

  /* Transitions */
  --transition-fast: 120ms ease-out;
  --transition-normal: 180ms ease-out;
  --transition-slow: 240ms ease-out;

  /* Layout */
  --container-max-width: 1200px;
  --container-max-width-wide: 1440px;
  --container-padding-x: 1.5rem;
}

/*
==============================
Reset / Normalize
==============================
*/

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

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

body {
  min-height: 100vh;
}

img,
svg,
video,
canvas,
audio,
iframe,
embed,
object {
  display: block;
  max-width: 100%;
}

img {
  height: auto;
}

picture {
  display: block;
}

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

button {
  border: none;
  padding: 0;
  background: none;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6,
p,
figure,
blockquote,
dl,
dd {
  margin: 0;
}

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

fieldset {
  margin: 0;
  padding: 0;
  border: 0;
}

legend {
  padding: 0;
}

/*
==============================
Base Styles
==============================
*/

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-md);
  line-height: var(--line-height-normal);
  background-color: var(--color-background);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  display: block;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: var(--line-height-tight);
  letter-spacing: 0.02em;
  color: var(--gray-50);
}

h1 {
  font-size: clamp(2.5rem, 2.2rem + 0.9vw, 3.25rem);
  margin-bottom: var(--space-24);
}

h2 {
  font-size: clamp(2rem, 1.8rem + 0.5vw, 2.5rem);
  margin-bottom: var(--space-20);
}

h3 {
  font-size: clamp(1.5rem, 1.4rem + 0.4vw, 2rem);
  margin-bottom: var(--space-16);
}

h4 {
  font-size: 1.25rem;
  margin-bottom: var(--space-12);
}

h5 {
  font-size: 1.125rem;
  margin-bottom: var(--space-8);
}

h6 {
  font-size: 1rem;
  margin-bottom: var(--space-6);
}

p {
  margin-bottom: var(--space-16);
  color: var(--color-text-muted);
}

strong {
  font-weight: 600;
  color: var(--color-text);
}

small {
  font-size: 0.875em;
}

a {
  position: relative;
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-normal);
}

a:hover {
  color: var(--color-accent-strong);
}

a:active {
  color: var(--color-primary);
}

a.inline-link {
  padding-bottom: 1px;
  box-shadow: inset 0 -1px 0 0 rgba(247, 201, 72, 0.6);
}

a.inline-link:hover {
  box-shadow: inset 0 -2px 0 0 rgba(247, 201, 72, 0.9);
}

code,
pre {
  font-family: var(--font-mono);
}

hr {
  border: 0;
  border-top: 1px solid var(--color-border-subtle);
  margin: var(--space-24) 0;
}

/*
==============================
Accessibility & Motion
==============================
*/

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/*
==============================
Utilities
==============================
*/

/* Layout */

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding-x);
  padding-right: var(--container-padding-x);
}

.container--wide {
  max-width: var(--container-max-width-wide);
}

.section {
  padding-top: var(--space-48);
  padding-bottom: var(--space-48);
}

.section--dense {
  padding-top: var(--space-32);
  padding-bottom: var(--space-32);
}

/* Flex helpers */

.flex {
  display: flex;
}

.inline-flex {
  display: inline-flex;
}

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

.flex-column {
  flex-direction: column;
}

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

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

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-end {
  justify-content: flex-end;
}

.gap-sm {
  gap: var(--space-8);
}

.gap-md {
  gap: var(--space-16);
}

.gap-lg {
  gap: var(--space-24);
}

/* Grid helpers */

.grid {
  display: grid;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-24);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-24);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-24);
}

@media (max-width: 960px) {
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Screen-reader only */

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

.sr-only-focusable:active,
.sr-only-focusable:focus {
  position: static;
  width: auto;
  height: auto;
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
}

/* Alignment & text */

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

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

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

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

.uppercase {
  text-transform: uppercase;
}

.tracking-wide {
  letter-spacing: 0.08em;
}

/* Simple spacing utilities (selected sizes) */

.mt-0 {
  margin-top: 0;
}

.mt-sm {
  margin-top: var(--space-8);
}

.mt-md {
  margin-top: var(--space-16);
}

.mt-lg {
  margin-top: var(--space-24);
}

.mb-0 {
  margin-bottom: 0;
}

.mb-sm {
  margin-bottom: var(--space-8);
}

.mb-md {
  margin-bottom: var(--space-16);
}

.mb-lg {
  margin-bottom: var(--space-24);
}

.py-section {
  padding-top: var(--space-48);
  padding-bottom: var(--space-48);
}

/*
==============================
Components
==============================
*/

/* Buttons */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  padding: 0.7rem 1.5rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-weight: 600;
  font-size: var(--font-size-sm);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition:
    background-color var(--transition-normal),
    border-color var(--transition-normal),
    color var(--transition-normal),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
}

.button--primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-strong));
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.button--primary:hover {
  background: linear-gradient(135deg, var(--color-primary-strong), #0d2338);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.button--primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-xs);
}

.button--accent {
  background-color: var(--color-accent);
  color: #16181d!important;
}

.button--accent:hover {
  background-color: var(--color-accent-strong);
}

.button--outline {
  background-color: transparent;
  border-color: var(--color-border-strong);
  color: var(--color-text);
}

.button--outline:hover {
  border-color: var(--color-accent);
  background-color: rgba(27, 34, 42, 0.8);
}

.button--ghost {
  background-color: transparent;
  color: var(--color-text-muted);
}

.button--ghost:hover {
  background-color: rgba(255, 255, 255, 0.04);
  color: var(--color-text);
}

.button--danger {
  background-color: var(--color-danger);
  color: #ffffff;
}

.button--danger:hover {
  background-color: #d64545;
}

.button--sm {
  padding: 0.45rem 0.9rem;
  font-size: var(--font-size-xs);
}

.button--lg {
  padding: 0.9rem 1.8rem;
  font-size: var(--font-size-md);
}

.button:disabled,
.button[aria-disabled="true"] {
  opacity: 0.6;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Form controls */

.input,
.select,
.textarea {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  background-color: var(--color-surface-alt);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  line-height: 1.4;
  transition:
    border-color var(--transition-normal),
    box-shadow var(--transition-normal),
    background-color var(--transition-normal);
}

.input::placeholder,
.textarea::placeholder {
  color: var(--color-text-soft);
}

.input:hover,
.select:hover,
.textarea:hover {
  border-color: var(--color-border-strong);
}

.input:focus-visible,
.select:focus-visible,
.textarea:focus-visible {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent-strong);
}

.input[disabled],
.select[disabled],
.textarea[disabled],
.input[aria-disabled="true"],
.select[aria-disabled="true"],
.textarea[aria-disabled="true"] {
  opacity: 0.6;
  cursor: not-allowed;
}

.textarea {
  min-height: 120px;
  resize: vertical;
}

.label {
  display: inline-flex;
  margin-bottom: var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
}

.form-field {
  margin-bottom: var(--space-16);
}

.form-help {
  margin-top: var(--space-4);
  font-size: var(--font-size-xs);
  color: var(--color-text-soft);
}

.form-error {
  margin-top: var(--space-4);
  font-size: var(--font-size-xs);
  color: var(--color-danger);
}

/* Card / panel - for product tiles, information blocks */

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: radial-gradient(circle at top left, rgba(247, 201, 72, 0.06), transparent 55%),
    var(--color-surface-elevated);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-subtle);
  box-shadow: var(--shadow-sm);
  padding: var(--space-20);
  overflow: hidden;
  transition:
    box-shadow var(--transition-normal),
    transform var(--transition-normal),
    border-color var(--transition-normal),
    background-color var(--transition-normal);
}

.card:hover {
  border-color: rgba(247, 201, 72, 0.4);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card--flat {
  box-shadow: none;
}

.card__header {
  margin-bottom: var(--space-12);
}

.card__title {
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.card__body {
  flex: 1 1 auto;
  color: var(--color-text-muted);
}

.card__footer {
  margin-top: var(--space-16);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-12);
}

/* Image wrapper for product / lifestyle photography */

.media-hero,
.media-cover {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background-color: #000;
}

.media-hero img,
.media-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
      to top,
      rgba(0, 0, 0, 0.85),
      rgba(0, 0, 0, 0.3) 40%,
      transparent 70%
    );
  pointer-events: none;
}

/* Badges - for availability, promos, safety cues */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.badge--success {
  background-color: rgba(59, 165, 93, 0.18);
  color: #78d29a;
}

.badge--warning {
  background-color: rgba(240, 180, 41, 0.2);
  color: #ffd36a;
}

.badge--danger {
  background-color: rgba(229, 83, 83, 0.18);
  color: #ff9b9b;
}

.badge--neutral {
  background-color: rgba(148, 163, 184, 0.2);
  color: #e5e7eb;
}

/* Price / typography accents for e‑commerce */

.price {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--font-size-xl);
  color: var(--gray-50);
}

.price--old {
  font-size: var(--font-size-sm);
  color: var(--color-text-soft);
  text-decoration: line-through;
}

.price--highlight {
  color: var(--color-accent);
}

/* Utility bar / toolbar (e.g., filters, sort) */

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-16);
  padding: var(--space-12) var(--space-16);
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
}

.toolbar__group {
  display: flex;
  align-items: center;
  gap: var(--space-12);
}

/* Breadcrumbs */

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-8);
  font-size: var(--font-size-sm);
  color: var(--color-text-soft);
}

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

.breadcrumbs a:hover {
  color: var(--color-accent);
}

.breadcrumbs__separator {
  opacity: 0.6;
}

/*
==============================
End base.css
==============================
*/