/* ==========================================================================
   Variables
   ========================================================================== */
:root {
  /* Color Palette - Automotive Inspired */
  --color-background: #0b0d12; /* deep charcoal, garage-like backdrop */
  --color-surface: #12151d; /* elevated surfaces */
  --color-surface-alt: #191e29;

  --color-text: #f5f7fb;
  --color-text-muted: #a3a9b7;

  --color-primary: #0f9cf5; /* accent blue, modern automotive tech */
  --color-primary-dark: #0b78bc;
  --color-primary-soft: rgba(15, 156, 245, 0.12);

  --color-success: #1fbf75;
  --color-success-soft: rgba(31, 191, 117, 0.12);

  --color-warning: #f5a623;
  --color-warning-soft: rgba(245, 166, 35, 0.12);

  --color-danger: #ff4d4f;
  --color-danger-soft: rgba(255, 77, 79, 0.14);

  /* Neutral Grays - for borders, subtle text, and dividers */
  --gray-50: #f7f8fa;
  --gray-100: #eceff3;
  --gray-200: #d7dde7;
  --gray-300: #bcc4d3;
  --gray-400: #98a0b3;
  --gray-500: #737b8e;
  --gray-600: #535b6b;
  --gray-700: #3b4251;
  --gray-800: #242833;
  --gray-900: #151821;

  --color-border-subtle: rgba(255, 255, 255, 0.06);
  --color-border-strong: rgba(255, 255, 255, 0.12);

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji",
    "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  --font-mono: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;

  /* Font sizes (rem-based for scalability) */
  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-base: 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 heights */
  --line-height-tight: 1.2;
  --line-height-snug: 1.35;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  /* Spacing scale (px) - 0 to 96px */
  --space-0: 0;
  --space-1: 2px;
  --space-2: 4px;
  --space-3: 6px;
  --space-4: 8px;
  --space-5: 10px;
  --space-6: 12px;
  --space-7: 14px;
  --space-8: 16px;
  --space-10: 20px;
  --space-12: 24px;
  --space-16: 32px;
  --space-20: 40px;
  --space-24: 48px;
  --space-28: 56px;
  --space-32: 64px;
  --space-40: 80px;
  --space-48: 96px;

  /* Radii */
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;
  --radius-xl: 16px;
  --radius-full: 999px;

  /* Shadows - subtle, automotive-style depth */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-sm: 0 4px 10px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.6);

  /* Transitions */
  --transition-fast: 120ms ease-out;
  --transition-base: 200ms ease-out;
  --transition-slow: 280ms ease-out;
}

/* Respect user color scheme (if light mode is added later) */
@media (prefers-color-scheme: light) {
  :root {
    --color-background: #f5f7fa;
    --color-surface: #ffffff;
    --color-surface-alt: #f0f2f7;

    --color-text: #151821;
    --color-text-muted: #6c7283;

    --color-border-subtle: rgba(0, 0, 0, 0.06);
    --color-border-strong: rgba(0, 0, 0, 0.14);

    --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.06);
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.1);
    --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.16);
    --shadow-lg: 0 10px 30px rgba(15, 23, 42, 0.2);
  }
}

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

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

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

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

ul[role='list'],
ol[role='list'] {
  list-style: none;
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  text-rendering: optimizeLegibility;
}

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

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

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

textarea {
  resize: vertical;
}

/* Remove default link underlines but keep color inheritance */
a {
  text-decoration: none;
  color: inherit;
}

a:hover {
  text-decoration: none;
}

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

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

/* Headings - scalable, with controlled margins */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: var(--line-height-tight);
  color: var(--color-text);
  letter-spacing: 0.01em;
}

h1 {
  font-size: clamp(2.25rem, 2vw + 1.5rem, 3rem);
  margin-bottom: var(--space-12);
}

h2 {
  font-size: clamp(1.875rem, 1.5vw + 1.25rem, 2.25rem);
  margin-bottom: var(--space-10);
}

h3 {
  font-size: clamp(1.5rem, 1vw + 1.1rem, 1.875rem);
  margin-bottom: var(--space-8);
}

h4 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-6);
}

h5 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-4);
}

h6 {
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

p {
  margin-bottom: var(--space-6);
  line-height: var(--line-height-relaxed);
  /* comfortable line length */
  color: var(--color-text);
}

strong {
  font-weight: 600;
}

small {
  font-size: 0.875em;
}

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

hr {
  border: 0;
  border-top: 1px solid var(--color-border-subtle);
  margin: var(--space-16) 0;
}

/* Links - primary accent for interactive elements */
a,
button,
[role='button'] {
  -webkit-tap-highlight-color: transparent;
}

a.link,
.link {
  color: var(--color-primary);
  text-decoration: none;
  position: relative;
  transition: color var(--transition-base);
}

.a-link-underline,
.link-underline {
  position: relative;
}

.link::after,
.a-link-underline::after,
.link-underline::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform-origin: left;
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.link:hover::after,
.link:focus-visible::after,
.a-link-underline:hover::after,
.a-link-underline:focus-visible::after,
.link-underline:hover::after,
.link-underline:focus-visible::after {
  transform: scaleX(1);
}

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

:focus {
  outline: none;
}

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   Layout & Utilities
   ========================================================================== */

/* Centered content with max-width suited for a product marketplace */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-8);
  padding-right: var(--space-8);
}

@media (min-width: 1440px) {
  .container {
    max-width: 1320px;
  }
}

/* Flex Helpers */
.flex {
  display: flex;
}

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

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.flex-column {
  display: flex;
  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;
}

.gap-sm {
  gap: var(--space-6);
}

.gap-md {
  gap: var(--space-10);
}

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

/* Grid Helpers - for responsive product grids */
.grid {
  display: grid;
}

.grid-auto-fit {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-10);
}

.grid-auto-fill {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-10);
}

/* Width constraints */
.w-full {
  width: 100%;
}

/* Spacing utilities (subset for common use) */
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

.mt-xs { margin-top: var(--space-4); }
.mb-xs { margin-bottom: var(--space-4); }

.mt-sm { margin-top: var(--space-6); }
.mb-sm { margin-bottom: var(--space-6); }

.mt-md { margin-top: var(--space-10); }
.mb-md { margin-bottom: var(--space-10); }

.mt-lg { margin-top: var(--space-16); }
.mb-lg { margin-bottom: var(--space-16); }

.pt-sm { padding-top: var(--space-6); }
.pb-sm { padding-bottom: var(--space-6); }

.pt-md { padding-top: var(--space-10); }
.pb-md { padding-bottom: var(--space-10); }

.pt-lg { padding-top: var(--space-16); }
.pb-lg { padding-bottom: var(--space-16); }

.px-sm {
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.px-md {
  padding-left: var(--space-10);
  padding-right: var(--space-10);
}

.px-lg {
  padding-left: var(--space-16);
  padding-right: var(--space-16);
}

/* 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;
}

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

/* Buttons - primary CTAs for actions like "Dodaj do koszyka" */
.button,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  font-weight: 600;
  font-size: var(--font-size-sm);
  text-transform: none;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition:
    background-color var(--transition-base),
    color var(--transition-base),
    border-color var(--transition-base),
    box-shadow var(--transition-base),
    transform var(--transition-fast);
}

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

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

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

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

.button-outline:hover,
.btn-outline:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
}

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

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

.button[disabled],
.btn[disabled],
.button:disabled,
.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.button-icon,
.btn-icon {
  padding: 0.45rem;
  border-radius: var(--radius-full);
  width: 2.25rem;
  height: 2.25rem;
}

/* Inputs - search bar, filters, checkout forms */
input[type='text'],
input[type='email'],
input[type='password'],
input[type='search'],
input[type='number'],
input[type='tel'],
select,
textarea {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  background-color: var(--color-surface);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-snug);
  transition:
    border-color var(--transition-base),
    box-shadow var(--transition-base),
    background-color var(--transition-base);
}

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

input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary-soft), var(--shadow-xs);
  background-color: var(--color-surface-alt);
}

input[disabled],
select[disabled],
textarea[disabled] {
  cursor: not-allowed;
  opacity: 0.6;
}

/* Cards - product tiles, information panels */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-subtle);
  box-shadow: var(--shadow-xs);
  padding: var(--space-10);
  transition:
    box-shadow var(--transition-base),
    transform var(--transition-base),
    border-color var(--transition-base),
    background-color var(--transition-base);
}

.card-hoverable {
  cursor: pointer;
}

.card-hoverable:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-soft);
  transform: translateY(-2px);
  background-color: var(--color-surface-alt);
}

.card-header {
  margin-bottom: var(--space-6);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.card-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.card-body {
  font-size: var(--font-size-sm);
  color: var(--color-text);
}

.card-footer {
  margin-top: var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

/* Badges - for status like "Dostępny", "Nowość", "Promocja" */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.15rem 0.55rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border: 1px solid transparent;
}

.badge-success {
  color: var(--color-success);
  background-color: var(--color-success-soft);
  border-color: rgba(31, 191, 117, 0.4);
}

.badge-warning {
  color: var(--color-warning);
  background-color: var(--color-warning-soft);
  border-color: rgba(245, 166, 35, 0.4);
}

.badge-danger {
  color: var(--color-danger);
  background-color: var(--color-danger-soft);
  border-color: rgba(255, 77, 79, 0.4);
}

/* Pills for car model / compatibility tags */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  background-color: rgba(255, 255, 255, 0.03);
}

/* Tables (e.g., technical specs) */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

th,
td {
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--color-border-subtle);
}

th {
  text-align: left;
  font-weight: 600;
  color: var(--color-text-muted);
}

tr:nth-child(even) td {
  background-color: rgba(255, 255, 255, 0.01);
}

/* Toast/Alert base styles - order updates, errors */
.alert {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-size: var(--font-size-sm);
  display: flex;
  align-items: flex-start;
  gap: var(--space-6);
}

.alert-success {
  background-color: var(--color-success-soft);
  border-color: rgba(31, 191, 117, 0.5);
  color: var(--color-success);
}

.alert-warning {
  background-color: var(--color-warning-soft);
  border-color: rgba(245, 166, 35, 0.5);
  color: var(--color-warning);
}

.alert-danger {
  background-color: var(--color-danger-soft);
  border-color: rgba(255, 77, 79, 0.5);
  color: var(--color-danger);
}

/* Breadcrumbs (for navigation clarity) */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.breadcrumb a {
  color: inherit;
}

.breadcrumb-separator {
  opacity: 0.5;
}

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

/* Utility for subtle panels (e.g., shipping info) */
.surface-soft {
  background-color: var(--color-surface-alt);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
}

/* End of base.css */