/* ========================================================================
   Variables
   ======================================================================== */
:root {
  /* Color palette - tailored for modern automotive / detailing feel */
  --color-bg: #070b10; /* deep, clean background */
  --color-surface: #0f151f; /* cards, headers */
  --color-surface-alt: #151c28;
  --color-text: #f5f7fa;
  --color-text-muted: #a3afc4;

  --color-primary: #00b3ff; /* accent / CTA */
  --color-primary-soft: rgba(0, 179, 255, 0.12);
  --color-primary-dark: #008fcc;

  --color-success: #19c27a;
  --color-success-soft: rgba(25, 194, 122, 0.12);
  --color-warning: #ffb020;
  --color-warning-soft: rgba(255, 176, 32, 0.12);
  --color-danger: #ff4d4f;
  --color-danger-soft: rgba(255, 77, 79, 0.12);

  /* Neutral grays for borders, subtle text, etc. */
  --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: #111827;

  --border-color-subtle: rgba(255, 255, 255, 0.06);
  --border-color-strong: rgba(255, 255, 255, 0.14);

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

  /* Font sizes (clamped for responsiveness) */
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.25rem;
  --fs-2xl: clamp(1.3rem, 1.15rem + 0.5vw, 1.6rem);
  --fs-3xl: clamp(1.6rem, 1.35rem + 0.8vw, 2rem);
  --fs-4xl: clamp(2rem, 1.6rem + 1.3vw, 2.6rem);

  /* Line heights */
  --lh-tight: 1.2;
  --lh-normal: 1.5;
  --lh-relaxed: 1.7;

  /* Spacing scale (px values as rem for consistency) */
  --space-0: 0;
  --space-1: 0.25rem;  /* 4px  */
  --space-2: 0.5rem;   /* 8px  */
  --space-3: 0.75rem;  /* 12px */
  --space-4: 1rem;     /* 16px */
  --space-5: 1.25rem;  /* 20px */
  --space-6: 1.5rem;   /* 24px */
  --space-8: 2rem;     /* 32px */
  --space-10: 2.5rem;  /* 40px */
  --space-12: 3rem;    /* 48px */
  --space-16: 4rem;    /* 64px */
  --space-20: 5rem;    /* 80px */
  --space-24: 6rem;    /* 96px */

  /* Radii */
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 18px;
  --radius-full: 999px;

  /* Shadows: subtle and elevated for product cards, modals, etc. */
  --shadow-sm: 0 6px 18px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 18px 45px rgba(0, 0, 0, 0.4);
  --shadow-soft: 0 20px 60px rgba(4, 12, 25, 0.7);

  /* Transitions */
  --transition-fast: 150ms ease-out;
  --transition-normal: 220ms ease-out;
  --transition-slow: 320ms ease-out;

  /* Layout */
  --layout-max-width: 1120px;
  --layout-gutter: var(--space-4);

  /* Z-index scale */
  --z-header: 40;
  --z-overlay: 50;
  --z-modal: 60;
  --z-toast: 70;
}

/* Reduced motion adjustments */
@media (prefers-reduced-motion: reduce) {
  :root {
    --transition-fast: 0ms;
    --transition-normal: 0ms;
    --transition-slow: 0ms;
  }
}

/* ========================================================================
   Reset / Normalize
   ======================================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

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

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

body {
  min-height: 100vh;
}

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

picture {
  display: block;
}

button,
input,
select,
textarea {
  margin: 0;
  font: inherit;
  color: inherit;
}

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

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

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

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

textarea {
  resize: vertical;
}

/* ========================================================================
   Base Styles
   ======================================================================== */
body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  background-color: var(--color-bg);
  color: var(--color-text);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

main {
  display: block;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: var(--lh-tight);
  color: var(--color-text);
}

h1 {
  font-size: var(--fs-4xl);
  margin-bottom: var(--space-4);
}

h2 {
  font-size: var(--fs-3xl);
  margin-bottom: var(--space-3);
}

h3 {
  font-size: var(--fs-2xl);
  margin-bottom: var(--space-2);
}

h4 {
  font-size: var(--fs-xl);
  margin-bottom: var(--space-2);
}

h5 {
  font-size: var(--fs-lg);
  margin-bottom: var(--space-2);
}

h6 {
  font-size: var(--fs-base);
  margin-bottom: var(--space-2);
}

p {
  margin-bottom: var(--space-3);
  color: var(--color-text-muted);
}

p:last-child {
  margin-bottom: 0;
}

strong,
b {
  font-weight: 600;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-normal);
}

a:hover {
  color: var(--color-primary-dark);
}

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

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

::selection {
  background-color: var(--color-primary-soft);
  color: var(--color-text);
}

/* ========================================================================
   Accessibility & Focus Styles
   ======================================================================== */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

/* Visually hidden but accessible to screen readers */
.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;
}

/* Respect prefers-reduced-motion */
@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;
  }
}

/* ========================================================================
   Layout Utilities
   ======================================================================== */
.container {
  width: 100%;
  max-width: var(--layout-max-width);
  margin-inline: auto;
  padding-inline: var(--layout-gutter);
}

.section {
  padding-block: var(--space-12);
}

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

.section--strong {
  padding-block: var(--space-16);
}

/* 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-2 {
  gap: var(--space-2);
}

.gap-3 {
  gap: var(--space-3);
}

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

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

/* Grid helpers */
.grid {
  display: grid;
}

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

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

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

.grid-auto-fit-minmax-200 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

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

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

/* Width & alignment */
.text-center {
  text-align: center;
}

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

.w-full {
  width: 100%;
}

.m-auto {
  margin: auto;
}

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

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

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

.py-4 {
  padding-block: var(--space-4);
}

.py-6 {
  padding-block: var(--space-6);
}

.p-4 {
  padding: var(--space-4);
}

.p-6 {
  padding: var(--space-6);
}

/* Text utilities */
.text-sm {
  font-size: var(--fs-sm);
}

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

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

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

/* Background utilities */
.bg-surface {
  background-color: var(--color-surface);
}

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

.bg-primary-soft {
  background-color: var(--color-primary-soft);
}

/* Border utilities */
.border-subtle {
  border: 1px solid var(--border-color-subtle);
}

.rounded-md {
  border-radius: var(--radius-md);
}

.rounded-lg {
  border-radius: var(--radius-lg);
}

.shadow-sm {
  box-shadow: var(--shadow-sm);
}

.shadow-md {
  box-shadow: var(--shadow-md);
}

/* ========================================================================
   Components - Buttons
   ======================================================================== */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding-inline: 1.25rem;
  padding-block: 0.7rem;
  border-radius: var(--radius-full);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  cursor: pointer;
  transition:
    background-color var(--transition-normal),
    color var(--transition-normal),
    border-color var(--transition-normal),
    box-shadow var(--transition-normal),
    transform var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.button--primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #0b1017;
  box-shadow: 0 12px 30px rgba(0, 179, 255, 0.36);
}

.button--primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 40px rgba(0, 179, 255, 0.45);
}

.button--primary:active {
  transform: translateY(0);
  box-shadow: 0 8px 20px rgba(0, 179, 255, 0.32);
}

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

.button--ghost:hover {
  background-color: rgba(255, 255, 255, 0.03);
}

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

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

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

.button--lg {
  padding-inline: 1.6rem;
  padding-block: 0.9rem;
  font-size: var(--fs-base);
}

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

.button:focus-visible {
  outline: 2px solid #ffffff;
  outline-offset: 3px;
}

/* ========================================================================
   Components - Form Inputs
   ======================================================================== */
.input,
.select,
.textarea {
  width: 100%;
  padding-inline: 0.85rem;
  padding-block: 0.65rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color-subtle);
  background-color: #060910;
  color: var(--color-text);
  font-size: var(--fs-sm);
  line-height: var(--lh-normal);
  transition:
    border-color var(--transition-normal),
    box-shadow var(--transition-normal),
    background-color var(--transition-normal);
}

.input::placeholder,
.textarea::placeholder {
  color: var(--gray-500);
}

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

.input[aria-invalid="true"],
.select[aria-invalid="true"],
.textarea[aria-invalid="true"] {
  border-color: var(--color-danger);
}

.label {
  display: block;
  font-size: var(--fs-sm);
  margin-bottom: var(--space-1);
  color: var(--color-text);
}

.form-help {
  margin-top: var(--space-1);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

.form-error {
  margin-top: var(--space-1);
  font-size: var(--fs-xs);
  color: var(--color-danger);
}

/* ========================================================================
   Components - Card (Product, Info Blocks, etc.)
   ======================================================================== */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color-subtle);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
  transition:
    transform var(--transition-normal),
    box-shadow var(--transition-normal),
    border-color var(--transition-normal),
    background-color var(--transition-normal);
}

.card--hoverable:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-color-strong);
}

.card__media {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--space-3);
}

.card__title {
  font-size: var(--fs-lg);
  margin-bottom: var(--space-2);
}

.card__subtitle {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.card__price {
  font-size: var(--fs-xl);
  font-weight: 600;
}

/* ========================================================================
   Components - Badges / Pills (e.g. "Öne Çıkan", "İndirim")
   ======================================================================== */
.badge {
  display: inline-flex;
  align-items: center;
  padding-inline: 0.6rem;
  padding-block: 0.18rem;
  border-radius: var(--radius-full);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  border: 1px solid transparent;
}

.badge--primary {
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  border-color: rgba(0, 179, 255, 0.4);
}

.badge--success {
  background-color: var(--color-success-soft);
  color: var(--color-success);
}

.badge--warning {
  background-color: var(--color-warning-soft);
  color: var(--color-warning);
}

.badge--danger {
  background-color: var(--color-danger-soft);
  color: var(--color-danger);
}

/* ========================================================================
   Components - Simple Tag List (Categories, Filters)
   ======================================================================== */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tag {
  padding-inline: 0.75rem;
  padding-block: 0.35rem;
  border-radius: var(--radius-full);
  font-size: var(--fs-xs);
  background-color: rgba(255, 255, 255, 0.04);
  color: var(--color-text-muted);
}

/* ========================================================================
   Helpers specific to ecommerce layout
   ======================================================================== */
.price {
  font-weight: 600;
  font-size: var(--fs-lg);
}

.price--old {
  font-size: var(--fs-sm);
  color: var(--gray-500);
  text-decoration: line-through;
}

.price--discount {
  color: var(--color-success);
}

.rating {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

.chip-filter {
  padding-inline: 0.9rem;
  padding-block: 0.35rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color-subtle);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  background-color: transparent;
  cursor: pointer;
  transition:
    background-color var(--transition-normal),
    border-color var(--transition-normal),
    color var(--transition-normal);
}

.chip-filter--active {
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
}

/* ========================================================================
   Responsive adjustments
   ======================================================================== */
@media (max-width: 768px) {
  .section {
    padding-block: var(--space-8);
  }

  .section--strong {
    padding-block: var(--space-12);
  }

  h1 {
    margin-bottom: var(--space-3);
  }

  .container {
    padding-inline: var(--space-3);
  }

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

@media (max-width: 480px) {
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }
}