/* ========================================================================== 
   Variables
   ========================================================================== */

:root {
  /* Color palette - tuned for a modern, friendly pet e‑commerce theme */
  --color-background: #f7f8fb; /* soft neutral white */
  --color-surface: #ffffff;
  --color-text: #111827; /* near-black for strong contrast */
  --color-text-muted: #6b7280; /* neutral gray */

  --color-primary: #1e3a8a; /* deep blue */
  --color-primary-soft: #e0e7ff; /* soft blue background */
  --color-primary-strong: #1d4ed8; /* interactive primary */

  --color-success: #16a34a;
  --color-success-soft: #dcfce7;

  --color-warning: #f59e0b;
  --color-warning-soft: #fef3c7;

  --color-danger: #dc2626;
  --color-danger-soft: #fee2e2;

  --color-border-subtle: #e5e7eb;
  --color-border-strong: #cbd5f5;

  --color-focus-ring: #2563eb;

  /* Neutral grays */
  --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;

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

  --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 */

  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  /* Spacing scale (px values expressed in rems, base 16px) */
  --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 */

  /* Radius */
  --radius-xs: 0.125rem;
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-pill: 999px;

  /* Shadows - soft and premium */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08),
               0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 6px rgba(15, 23, 42, 0.08),
               0 2px 4px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 15px rgba(15, 23, 42, 0.12),
               0 4px 6px rgba(15, 23, 42, 0.08);

  /* Transitions */
  --transition-fast: 120ms ease-out;
  --transition-base: 180ms ease-out;
  --transition-slow: 250ms ease-out;

  /* Layout */
  --max-width-container: 1200px;
}

/* Respect user prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  :root {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ========================================================================== 
   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;
  padding: 0;
  margin: 0;
}

body {
  min-height: 100vh;
}

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

img {
  height: auto;
}

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

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

textarea {
  resize: vertical;
}

/* Remove default focus outlines, we'll re-add with :focus-visible */
:focus {
  outline: none;
}

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

body {
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  background-color: var(--color-background);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main {
  min-height: 60vh;
}

/* Headings - modern, clean hierarchy */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-family-heading);
  font-weight: 600;
  line-height: var(--line-height-tight);
  color: var(--color-text);
}

h1 {
  font-size: clamp(2.25rem, 1.8rem + 1vw, 3rem);
  margin-bottom: var(--space-4);
}

h2 {
  font-size: clamp(1.875rem, 1.6rem + 0.6vw, 2.25rem);
  margin-bottom: var(--space-3);
}

h3 {
  font-size: 1.5rem;
  margin-bottom: var(--space-3);
}

h4 {
  font-size: 1.25rem;
  margin-bottom: var(--space-2);
}

h5 {
  font-size: 1.125rem;
  margin-bottom: var(--space-2);
}

h6 {
  font-size: 1rem;
  margin-bottom: var(--space-2);
}

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

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

small {
  font-size: var(--font-size-sm);
}

strong {
  font-weight: 600;
}

/* Links - clean, premium interactions */
a {
  color: var(--color-primary-strong);
  text-decoration: none;
  cursor: pointer;
  transition: color var(--transition-base),
    text-decoration-color var(--transition-base),
    background-color var(--transition-base);
}

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

a:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 3px;
  border-radius: var(--radius-xs);
}

/* Lists */
ul,
ol {
  padding-left: 1.5rem;
  margin: 0 0 var(--space-3);
}

/* ========================================================================== 
   Accessibility & Focus Styles
   ========================================================================== */

:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 3px;
}

[tabindex="-1"]:focus {
  outline: none !important;
}

/* Screen reader only utility */
.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;
}

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

/* Layout container for main content areas */
.container {
  width: 100%;
  max-width: var(--max-width-container);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

/* 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-col {
  display: flex;
  flex-direction: column;
}

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

.gap-xs {
  gap: var(--space-1);
}

.gap-sm {
  gap: var(--space-2);
}

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

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

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

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-5);
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

/* Simple spacing utilities (examples) */
.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--space-2); }
.mt-md { margin-top: var(--space-4); }
.mt-lg { margin-top: var(--space-6); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-2); }
.mb-md { margin-bottom: var(--space-4); }
.mb-lg { margin-bottom: var(--space-6); }

.py-sm {
  padding-top: var(--space-2);
  padding-bottom: var(--space-2);
}

.py-md {
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
}

.py-lg {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

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

/* Buttons - primary actions for add-to-cart, checkout, etc. */
.button,
button,
input[type="button"],
input[type="submit"],
input[type="reset"] {
  --btn-bg: var(--color-primary-strong);
  --btn-bg-hover: #1e40af;
  --btn-bg-active: #1e3a8a;
  --btn-color: #ffffff;
  --btn-radius: var(--radius-pill);
  --btn-shadow: var(--shadow-sm);

  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.6rem 1.4rem;
  border-radius: var(--btn-radius);
  border: 1px solid transparent;
  background-color: var(--btn-bg);
  color: var(--btn-color)!important;
  font-weight: 600;
  font-size: var(--font-size-sm);
  line-height: 1;
  cursor: pointer;
  box-shadow: var(--btn-shadow);
  transition: background-color var(--transition-base),
    box-shadow var(--transition-base),
    transform var(--transition-fast),
    border-color var(--transition-fast);
  text-decoration: none;
}

.button:hover,
button:hover,
input[type="button"]:hover,
input[type="submit"]:hover,
input[type="reset"]:hover {
  background-color: var(--btn-bg-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.button:active,
button:active,
input[type="button"]:active,
input[type="submit"]:active,
input[type="reset"]:active {
  background-color: var(--btn-bg-active);
  box-shadow: var(--shadow-xs);
  transform: translateY(0);
}

.button:focus-visible,
button:focus-visible,
input[type="button"]:focus-visible,
input[type="submit"]:focus-visible,
input[type="reset"]:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 3px;
}

.button[disabled],
button[disabled],
input[type="button"][disabled],
input[type="submit"][disabled],
input[type="reset"][disabled],
.button:disabled,
button:disabled {
  cursor: not-allowed;
  opacity: 0.65;
  box-shadow: none;
}

/* Button variants */
.button--secondary {
  --btn-bg: var(--color-surface);
  --btn-bg-hover: var(--gray-100);
  --btn-bg-active: var(--gray-200);
  --btn-color: var(--color-text);
  border-color: var(--color-border-subtle);
  box-shadow: var(--shadow-xs);
  color: var(--btn-color)!important;
}

.button--ghost {
  --btn-bg: transparent;
  --btn-bg-hover: var(--color-primary-soft);
  --btn-bg-active: var(--color-primary-soft);
  --btn-color: var(--color-primary-strong);
  border-color: transparent;
  box-shadow: none;
  color: var(--btn-color)!important;
}

/* Inputs & form controls */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
input[type="tel"],
input[type="number"],
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);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  transition: border-color var(--transition-base),
    box-shadow var(--transition-base),
    background-color var(--transition-base);
}

input::placeholder,
textarea::placeholder {
  color: var(--gray-400);
}

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

input[disabled],
select[disabled],
textarea[disabled] {
  background-color: var(--gray-100);
  cursor: not-allowed;
}

label {
  display: inline-block;
  margin-bottom: var(--space-1);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
}

/* Card - for product tiles, article previews, etc. */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-subtle);
  box-shadow: var(--shadow-sm);
  padding: var(--space-4);
  overflow: hidden;
  transition: box-shadow var(--transition-base),
    transform var(--transition-base),
    border-color var(--transition-base);
}

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

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

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

.card__footer {
  margin-top: auto;
}

/* Badge / pill - useful for category labels, Polish market flags, etc. */
.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: 500;
  background-color: var(--color-primary-soft);
  color: var(--color-primary-strong);
}

.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);
}

/* Tag-style pill often used for filters (cats, dogs, small animals) */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-subtle);
  font-size: var(--font-size-xs);
  background-color: var(--color-surface)!important;
  color: var(--color-text-muted)!important;
}

.tag--active {
  border-color: var(--color-primary-strong);
  color: var(--color-primary-strong)!important;
  background-color: var(--color-primary-soft)!important;
}

/* Helper for sections (hero, curated picks, expert articles) */
.section {
  padding-top: var(--space-10);
  padding-bottom: var(--space-10);
}

.section--alt {
  background-color: var(--gray-50);
}

/* Review stars container baseline */
.rating {
  display: inline-flex;
  align-items: center;
  gap: 0.15rem;
  color: #fbbf24; /* amber-400 for stars */
  font-size: 0.9rem;
}