:root {
  /* Color Palette */
  --color-bg: #05060a;
  --color-bg-elevated: #0d1016;
  --color-surface: #111827;
  --color-surface-soft: #1f2937;
  --color-border-subtle: #1f2933;
  --color-border-strong: #374151;

  --color-text: #e5e7eb;
  --color-text-muted: #9ca3af;
  --color-text-soft: #6b7280;
  --color-text-inverse: #0b1120;

  --color-primary: #38bdf8; /* light cyan / tech accent */
  --color-primary-soft: rgba(56, 189, 248, 0.12);
  --color-primary-strong: #0ea5e9;

  --color-success: #22c55e;
  --color-success-soft: rgba(34, 197, 94, 0.12);
  --color-warning: #eab308;
  --color-warning-soft: rgba(234, 179, 8, 0.12);
  --color-danger: #ef4444;
  --color-danger-soft: rgba(239, 68, 68, 0.12);

  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, 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-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-snug: 1.35;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  /* Spacing scale (0–96px) */
  --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-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-pill: 999px;

  /* Shadows (subtle, for tech-clean design) */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.25);
  --shadow-sm: 0 6px 18px rgba(15, 23, 42, 0.35);
  --shadow-md: 0 14px 45px rgba(15, 23, 42, 0.45);

  /* Transitions */
  --transition-fast: 120ms ease-out;
  --transition-base: 180ms ease-out;
  --transition-slow: 260ms ease-out;
}

/*
  =======================================================
  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;
}

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

img {
  height: auto;
}

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

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

textarea {
  resize: vertical;
}

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

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: radial-gradient(circle at top, #020617 0, var(--color-bg) 46%, #020617 100%);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  display: block;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: var(--line-height-tight);
  color: var(--color-gray-50);
}

h1 {
  font-size: clamp(2rem, 2.5vw + 1.5rem, 2.75rem);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

h2 {
  font-size: clamp(1.5rem, 1.2vw + 1.2rem, 2rem);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-2);
}

h4 {
  font-size: 1.125rem;
  margin-bottom: var(--space-2);
}

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

strong {
  font-weight: 600;
}

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

hr {
  border: 0;
  border-top: 1px solid var(--color-border-subtle);
  margin: var(--space-6) 0;
}

::selection {
  background-color: rgba(56, 189, 248, 0.25);
  color: var(--color-gray-50);
}

/* Links: clean, tech-oriented accent */

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base), opacity var(--transition-fast), text-decoration-color var(--transition-base);
  text-decoration-color: transparent;
}

a:hover {
  color: var(--color-primary-strong);
  text-decoration: underline;
  text-decoration-color: rgba(56, 189, 248, 0.6);
}

a:active {
  opacity: 0.85;
}

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

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

:focus {
  outline: none;
}

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

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

/* Layout container for content-focused pages */

.container {
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
  max-width: 1120px;
}

@media (min-width: 1200px) {
  .container {
    max-width: 1200px;
  }
}

/* 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 {
  flex-direction: column;
}

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

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

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

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

.gap-4 {
  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-4);
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Visually hidden, accessible to screen readers */

.sr-only {
  border: 0 !important;
  clip: rect(1px, 1px, 1px, 1px) !important;
  -webkit-clip-path: inset(50%) !important;
          clip-path: inset(50%) !important;
  height: 1px !important;
  width: 1px !important;
  margin: -1px !important;
  overflow: hidden !important;
  padding: 0 !important;
  position: absolute !important;
  white-space: nowrap !important;
}

/* Simple spacing utility for sections */

.section {
  padding-top: var(--space-10);
  padding-bottom: var(--space-10);
}

.section--alt {
  background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.04), transparent 55%),
              radial-gradient(circle at bottom right, rgba(59, 130, 246, 0.08), transparent 55%),
              var(--color-bg-elevated);
}

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

/* Buttons: primary action for guides, comparisons, referrals */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-sm);
  font-weight: 500;
  line-height: 1.2;
  cursor: pointer;
  border: 1px solid transparent;
  transition:
    background-color var(--transition-base),
    color var(--transition-base),
    border-color var(--transition-base),
    box-shadow var(--transition-base),
    transform var(--transition-fast);
  user-select: none;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, #0ea5e9, #38bdf8);
  color: var(--color-text-inverse);
  box-shadow: 0 8px 24px rgba(56, 189, 248, 0.35);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 35px rgba(56, 189, 248, 0.45);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 6px 18px rgba(56, 189, 248, 0.35);
}

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

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

.btn-ghost {
  background: rgba(15, 23, 42, 0.7);
  color: var(--color-text-muted);
}

.btn-ghost:hover {
  background: rgba(15, 23, 42, 0.95);
}

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

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

/* Form inputs for search, filters, contact form */

.input,
select,
textarea {
  width: 100%;
  padding: 0.6rem 0.8rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  background-color: rgba(15, 23, 42, 0.85);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), background-color var(--transition-base);
}

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

.input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.5);
  background-color: rgba(15, 23, 42, 0.98);
}

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

/* Card: used for product guides, comparisons, reviews, testimonials */

.card {
  position: relative;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.16), transparent 55%),
    linear-gradient(135deg, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 0.96));
  border: 1px solid rgba(148, 163, 184, 0.24);
  box-shadow: var(--shadow-sm);
  padding: var(--space-5);
  overflow: hidden;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-base),
    border-color var(--transition-base),
    background var(--transition-base);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: rgba(56, 189, 248, 0.6);
}

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

.card-title {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-1);
}

.card-meta {
  font-size: var(--font-size-xs);
  color: var(--color-text-soft);
}

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

/* Tag/badge for categories like "AGD kuchenne", "Smart home", etc. */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.6rem;
  border-radius: var(--radius-pill);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  background-color: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.4);
  color: var(--color-text-soft);
}

.badge-primary {
  border-color: rgba(56, 189, 248, 0.8);
  background-color: rgba(8, 47, 73, 0.9);
  color: var(--color-primary);
}

/* Simple pill for user rating / opinions */

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-xs);
  background-color: var(--color-surface-soft);
  color: var(--color-text-soft);
}

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

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

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

/* Toast / alert for affiliate disclaimers and info messages */

.alert {
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border-strong);
  background-color: rgba(15, 23, 42, 0.9);
  font-size: var(--font-size-sm);
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
}

.alert-title {
  font-weight: 600;
  margin-bottom: 0.15rem;
  color: var(--color-gray-100);
}

.alert-info {
  border-color: rgba(56, 189, 248, 0.7);
  background-color: rgba(8, 47, 73, 0.9);
}

.alert-success {
  border-color: rgba(34, 197, 94, 0.7);
  background-color: rgba(5, 46, 22, 0.9);
}

.alert-warning {
  border-color: rgba(234, 179, 8, 0.7);
  background-color: rgba(66, 46, 5, 0.9);
}

.alert-danger {
  border-color: rgba(239, 68, 68, 0.7);
  background-color: rgba(69, 10, 10, 0.9);
}

/* Tables for structured comparisons */

.table-comparison {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
  background-color: rgba(15, 23, 42, 0.95);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.table-comparison thead {
  background: linear-gradient(90deg, rgba(15, 118, 110, 0.35), rgba(56, 189, 248, 0.4));
}

.table-comparison th,
.table-comparison td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid rgba(55, 65, 81, 0.9);
}

.table-comparison th {
  font-weight: 500;
  color: var(--color-gray-50);
  white-space: nowrap;
}

.table-comparison tbody tr:nth-child(even) {
  background-color: rgba(15, 23, 42, 0.9);
}

.table-comparison tbody tr:hover {
  background-color: rgba(15, 23, 42, 1);
}

/* Rating stars (for opinions / recenzje) */

.rating-stars {
  display: inline-flex;
  gap: 0.1rem;
  color: #fbbf24;
  font-size: 0.9rem;
}

/* Footer basic layout */

.site-footer {
  border-top: 1px solid var(--color-border-subtle);
  background-color: #020617;
  color: var(--color-text-soft);
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
  font-size: var(--font-size-sm);
}

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

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