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

:root {
  /* Colors */
  --color-bg: #060814;
  --color-surface: #0f172a;
  --color-surface-soft: #111827;
  --color-surface-alt: #020617;

  --color-text: #f9fafb;
  --color-text-muted: #9ca3af;
  --color-border: #1f2937;

  /* Energetic brand accents (SportAccessFit) */
  --color-primary: #22c55e; /* energetic green */
  --color-primary-soft: rgba(34, 197, 94, 0.12);
  --color-primary-strong: #16a34a;

  --color-success: #22c55e;
  --color-warning: #facc15;
  --color-danger: #ef4444;

  /* 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: #1f2937;
  --gray-900: #111827;

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-heading: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --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-xs: 0.125rem;
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.35);
  --shadow-md: 0 10px 25px rgba(15, 23, 42, 0.45);
  --shadow-lg: 0 24px 60px rgba(15, 23, 42, 0.6);

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

  /* Layout */
  --container-max-width: 1120px;
}

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

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

body {
  min-height: 100vh;
}

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

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

img,
video {
  height: auto;
}

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

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

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

/* Remove animations/transitions for users preferring reduced motion */
@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;
  }
}

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

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  background: radial-gradient(circle at top, #020617 0, #020617 24%, #020617 30%, #020617 35%, #020617 45%),
              radial-gradient(circle at top left, rgba(34, 197, 94, 0.16) 0, transparent 48%),
              radial-gradient(circle at top right, rgba(56, 189, 248, 0.12) 0, transparent 50%),
              #020617;
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
}

main {
  display: block;
}

p {
  margin-bottom: var(--space-4);
  color: var(--color-text-muted);
}

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

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: var(--line-height-tight);
  color: var(--gray-50);
  margin-bottom: var(--space-3);
}

h1 {
  font-size: clamp(2.25rem, 3vw + 1.5rem, 2.75rem);
}

h2 {
  font-size: clamp(1.875rem, 2.4vw + 1.1rem, 2.25rem);
}

h3 {
  font-size: clamp(1.5rem, 1.8vw + 0.9rem, 1.875rem);
}

h4 {
  font-size: var(--font-size-xl);
}

h5 {
  font-size: var(--font-size-lg);
}

h6 {
  font-size: var(--font-size-base);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

strong,
b {
  font-weight: 600;
}

/* Links (for a content-focused, readable experience) */

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

a:hover,
a:focus-visible {
  color: var(--color-primary-strong);
}

/* Lists */

ul,
ol {
  padding-left: 1.25rem;
  margin: 0 0 var(--space-4);
}

/* Blockquotes for expert recommendations / testimonials */

blockquote {
  margin: var(--space-4) 0;
  padding: var(--space-4);
  border-left: 3px solid var(--color-primary);
  background: rgba(15, 23, 42, 0.85);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
}

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

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

::-moz-focus-inner {
  border: 0;
}

/* 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;
}

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

/* Container for main content sections */

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

@media (min-width: 768px) {
  .container {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

/* Layout 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;
}

.grid {
  display: grid;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-6);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-6);
}

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

.mt-0 { margin-top: 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.pt-8 { padding-top: var(--space-8); }
.pb-8 { padding-bottom: var(--space-8); }

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

@media (min-width: 768px) {
  .section-padding {
    padding-top: var(--space-16);
    padding-bottom: var(--space-16);
  }
}

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.125rem 0.625rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: rgba(34, 197, 94, 0.1);
  color: var(--color-primary);
}

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

/* Buttons */

.button,
button,
input[type="button"],
input[type="submit"],
input[type="reset"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-strong) 100%);
  color: #020617;
  font-weight: 600;
  font-size: var(--font-size-sm);
  line-height: 1;
  cursor: pointer;
  transition: transform var(--transition-fast),
              box-shadow var(--transition-fast),
              background var(--transition-fast),
              border-color var(--transition-fast),
              color var(--transition-fast);
  white-space: nowrap;
}

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

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

.button--ghost {
  background: rgba(15, 23, 42, 0.85);
  border-color: rgba(148, 163, 184, 0.5);
  color: var(--gray-100);
}

.button--ghost:hover {
  border-color: var(--color-primary);
  background: rgba(22, 163, 74, 0.08);
}

.button--secondary {
  background: rgba(15, 23, 42, 0.9);
  color: var(--gray-50);
  border-color: rgba(148, 163, 184, 0.5);
}

.button--secondary:hover {
  border-color: var(--color-primary);
}

button[disabled],
.button[disabled],
button:disabled,
input[type="button"]:disabled,
input[type="submit"]:disabled,
input[type="reset"]:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Form elements (for kontakt / komentarze / plany treningowe) */

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
input[type="search"],
input[type="password"],
input[type="number"],
textarea,
select {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: rgba(15, 23, 42, 0.9);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-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);
}

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

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

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

label {
  display: inline-block;
  margin-bottom: 0.35rem;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--gray-200);
}

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

/* Cards: for workout guides, category tiles, featured articles, testimonials */

.card {
  position: relative;
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, rgba(15, 23, 42, 0.96), rgba(17, 24, 39, 0.98));
  border: 1px solid rgba(148, 163, 184, 0.1);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal),
              box-shadow var(--transition-normal),
              border-color var(--transition-normal),
              background var(--transition-normal);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: rgba(34, 197, 94, 0.55);
}

.card--soft {
  background: radial-gradient(circle at top left, rgba(34, 197, 94, 0.12), transparent 45%),
              rgba(15, 23, 42, 0.96);
}

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

.card-title {
  font-size: var(--font-size-lg);
  margin-bottom: 0.25rem;
}

.card-meta {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-500);
}

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

/* Tag list for categories like "trening w domu", "siła", "redukcja" */

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: var(--space-3);
}

.tag {
  font-size: var(--font-size-xs);
  padding: 0.15rem 0.6rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(148, 163, 184, 0.4);
  color: var(--gray-300);
}

/* Simple pill for "Partnerstwo", "Affiliate" disclaimers */

.pill-info {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-full);
  background: rgba(15, 23, 42, 0.9);
  border: 1px dashed rgba(148, 163, 184, 0.7);
  font-size: var(--font-size-xs);
  color: var(--gray-300);
}

/* Featured content highlight (e.g. top guides, polecane plany) */

.featured-strip {
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  background: radial-gradient(circle at left, rgba(34, 197, 94, 0.2), transparent 55%),
              rgba(15, 23, 42, 0.95);
  border: 1px solid rgba(34, 197, 94, 0.55);
}

/* Simple comment / feedback block */

.comment {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(31, 41, 55, 0.9);
}

.comment-author {
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--gray-100);
  margin-bottom: 0.15rem;
}

.comment-meta {
  font-size: var(--font-size-xs);
  color: var(--gray-500);
}

.comment-body {
  margin-top: 0.5rem;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* Header navigation baseline (for O nas, Plany, Dieta etc.) */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(2, 6, 23, 0.95), rgba(2, 6, 23, 0.82));
  border-bottom: 1px solid rgba(15, 23, 42, 0.9);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-top: 0.85rem;
  padding-bottom: 0.85rem;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  color: var(--gray-300);
  padding-bottom: 0.1rem;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.2rem;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), #38bdf8);
  transition: width var(--transition-normal);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--gray-50);
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  width: 100%;
}

.nav-link--active {
  color: var(--gray-50);
}

.nav-link--active::after {
  width: 100%;
}

/* Footer baseline */

.site-footer {
  border-top: 1px solid rgba(15, 23, 42, 0.9);
  background: radial-gradient(circle at top, rgba(34, 197, 94, 0.08), transparent 55%),
              #020617;
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
  color: var(--gray-400);
  font-size: var(--font-size-sm);
}

.site-footer a {
  color: var(--gray-200);
}

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