/* ============================================
   TYPOGRAPHY SYSTEM
   Base: 1rem = 16px
   ============================================ */

:root {
  /* =========================
     FONT FAMILIES
     ========================= */
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-heading: 'Inter', -apple-system, sans-serif;
  --font-mono: 'Fira Code', 'Courier New', monospace;

  /* =========================
     FONT WEIGHTS
     ========================= */
  --fw-light: 300;
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-black: 900;

  /* =========================
     MOBILE PORTRAIT (default)
     Container: 306px @ 412px viewport
     STAŁE WARTOŚCI
     ========================= */
  --fs-h1: 1.563rem;      /* 25px - podane przez Ciebie */
  --fs-h2: 1.375rem;      /* 22px */
  --fs-h3: 1.25rem;       /* 20px */
  --fs-h4: 1.125rem;      /* 18px */
  --fs-h5: 1rem;          /* 16px */
  --fs-h6: 0.938rem;      /* 15px */
  
  --fs-body: 1.25rem;     /* 20px - podane przez Ciebie */
  --fs-body-lg: 1.375rem; /* 22px */
  --fs-body-sm: 1rem;     /* 16px */
  --fs-body-xs: 0.875rem; /* 14px */

  /* Line Heights */
  --lh-h1: 1.2;
  --lh-h2: 1.25;
  --lh-h3: 1.3;
  --lh-h4: 1.35;
  --lh-h5: 1.4;
  --lh-h6: 1.4;
  --lh-body: 1.6;
  --lh-body-relaxed: 1.75;

  /* Letter Spacing */
  --ls-h1: -0.02em;
  --ls-h2: -0.015em;
  --ls-h3: -0.01em;
  --ls-h4: -0.005em;
  --ls-body: 0;
  --ls-body-wide: 0.01em;

  /* Spacing */
  --paragraph-spacing: 1rem;           /* 16px */
  --heading-margin-top: 1.5rem;        /* 24px */
  --heading-margin-bottom: 0.75rem;    /* 12px */
  --section-spacing: 2rem;             /* 32px */
}

/* ============================================
   TELEFONY LANDSCAPE (specjalny case)
   Container: ~524px
   DELIKATNY FLUID
   ============================================ */
@media (hover: none) and (pointer: coarse) and (orientation: landscape) and (max-height: 550px) {
  :root {
    /* Lekko większe niż portrait, ale bez przesady */
    --fs-h1: clamp(1.563rem, 1.2rem + 1.5vw, 1.875rem);    /* 25px → 30px */
    --fs-h2: clamp(1.375rem, 1.1rem + 1.2vw, 1.625rem);    /* 22px → 26px */
    --fs-h3: clamp(1.25rem, 1rem + 1vw, 1.5rem);           /* 20px → 24px */
    --fs-h4: clamp(1.125rem, 0.95rem + 0.8vw, 1.375rem);   /* 18px → 22px */
    
    --fs-body: 1.25rem; /* Stałe - dobra czytelność */
    
    --paragraph-spacing: 1.125rem;
    --heading-margin-bottom: 0.875rem;
  }
}

/* ============================================
   TABLET PORTRAIT
   541px - 1023px
   Container: padding 13cqw
   FLUID z Container Queries - WIĘKSZE NAGŁÓWKI
   ============================================ */
@media (min-width: 541px) and (max-width: 1023px) {
  :root {
    /* Viewport-based fluid jako fallback - ZWIĘKSZONE */
    --fs-h1: clamp(2rem, 0.5rem + 3.5vw, 3rem);           /* 32px → 48px */
    --fs-h2: clamp(1.75rem, 0.4rem + 3vw, 2.5rem);        /* 28px → 40px */
    --fs-h3: clamp(1.625rem, 0.35rem + 2.5vw, 2.25rem);   /* 26px → 36px */
    --fs-h4: clamp(1.5rem, 0.3rem + 2.25vw, 2rem);        /* 24px → 32px */
    --fs-h5: clamp(1.375rem, 0.25rem + 2vw, 1.75rem);     /* 22px → 28px */
    
    --fs-body: clamp(1.25rem, 1.1rem + 0.3vw, 1.375rem);   /* 20px → 22px */
    --fs-body-lg: clamp(1.375rem, 1.2rem + 0.35vw, 1.5rem);
    
    --paragraph-spacing: clamp(1rem, 0.75rem + 0.5vw, 1.5rem);
    --heading-margin-top: clamp(1.5rem, 1rem + 1vw, 2.5rem);
    --heading-margin-bottom: clamp(0.75rem, 0.5rem + 0.5vw, 1.25rem);
    --section-spacing: clamp(2rem, 1.5rem + 1.5vw, 3.5rem);
  }

  /* Container Query enhancement dla kontenera z tekstem */
  .prose,
  .text-container,
  article,
  main {
    container-type: inline-size;
    container-name: text-content;
  }

  @container text-content (min-width: 400px) {
    :root {
      --fs-h1: clamp(2rem, 0rem + 5cqi, 3rem);
      --fs-h2: clamp(1.75rem, -0.25rem + 4.5cqi, 2.5rem);
      --fs-h3: clamp(1.625rem, 0rem + 4cqi, 2.25rem);
      --fs-h4: clamp(1.5rem, 0rem + 3.5cqi, 2rem);
      --fs-body: clamp(1.25rem, 1rem + 0.75cqi, 1.375rem);
    }
  }
}

/* ============================================
   TABLET LANDSCAPE
   768px - 1023px w landscape
   (rzadkie urządzenia) - ZMNIEJSZONE NAGŁÓWKI
   ============================================ */
@media (min-width: 768px) and (max-width: 1023px) and (orientation: landscape) {
  :root {
    /* Bardziej stonowane rozmiary dla landscape */
    --fs-h1: clamp(2rem, 1rem + 2vw, 2.5rem);            /* 32px → 40px */
    --fs-h2: clamp(1.75rem, 0.875rem + 1.75vw, 2.125rem); /* 28px → 34px */
    --fs-h3: clamp(1.625rem, 0.8rem + 1.5vw, 1.875rem);   /* 26px → 30px */
    --fs-h4: clamp(1.5rem, 0.75rem + 1.25vw, 1.75rem);    /* 24px → 28px */
    
    --fs-body: 1.25rem; /* Stałe - landscape ma więcej miejsca */
    
    --paragraph-spacing: 1.25rem;
    --section-spacing: 3rem;
  }
}

/* ============================================
   DESKTOP / LAPTOP
   1024px+ landscape
   Container max: 1600px (text container: 836px)
   H2: ~39px (2.44rem), p: 20px (1.25rem)
   ZMNIEJSZONE H3, H4
   ============================================ */
@media (min-width: 1024px) and (orientation: landscape) {
  :root {
    /* Fluid od 1024px do ~1600px - bardziej stonowane */
    --fs-h1: clamp(2.5rem, 1.25rem + 1.953vw, 3.25rem);   /* 40px → 52px */
    --fs-h2: clamp(2.125rem, 1rem + 1.563vw, 2.625rem);   /* 34px → 42px */
    --fs-h3: clamp(1.875rem, 0.875rem + 1.367vw, 2.25rem); /* 30px → 36px */
    --fs-h4: clamp(1.625rem, 0.75rem + 1.172vw, 2rem);    /* 26px → 32px */
    --fs-h5: clamp(1.5rem, 0.75rem + 0.977vw, 1.875rem);  /* 24px → 30px */
    --fs-h6: clamp(1.375rem, 0.75rem + 0.781vw, 1.75rem); /* 22px → 28px */
    
    --fs-body: 1.25rem;     /* 20px - STAŁE jak podałeś */
    --fs-body-lg: 1.5rem;   /* 24px */
    --fs-body-sm: 1.125rem; /* 18px */
    
    --paragraph-spacing: 1.5rem;        /* 24px */
    --heading-margin-top: 2.5rem;       /* 40px */
    --heading-margin-bottom: 1.25rem;   /* 20px */
    --section-spacing: 5rem;            /* 80px */
  }

  /* Container Query dla kontenera tekstu (836px max) */
  .prose,
  .text-container,
  article,
  main {
    container-type: inline-size;
    container-name: text-content;
  }

  /* Przy kontenerze 836px optymalizacja */
  @container text-content (min-width: 836px) {
    :root {
      --fs-h1: 3.25rem;     /* 52px - maksimum */
      --fs-h2: 2.441rem;    /* ~39px - jak podałeś */
      --fs-h3: 2.125rem;    /* 34px - zmniejszone */
      --fs-h4: 1.875rem;    /* 30px - zmniejszone */
      --fs-body: 1.25rem;   /* 20px - jak podałeś */
      
      --paragraph-spacing: 1.5rem;
      --heading-margin-bottom: 1.5rem;
    }
  }
}

/* ============================================
   TABLET LANDSCAPE DUŻY (iPad i podobne)
   1024px - 1366px w landscape
   MNIEJSZE NAGŁÓWKI niż desktop
   ============================================ */
@media (min-width: 1024px) and (max-width: 1366px) and (orientation: landscape) {
  :root {
    /* Stałe wartości dla tabletów - bez przesadnego powiększania */
    --fs-h1: 2.25rem;     /* 36px */
    --fs-h2: 1.875rem;    /* 30px - zmniejszone z 34-42px */
    --fs-h3: 1.625rem;    /* 26px - zmniejszone z 30-36px */
    --fs-h4: 1.5rem;      /* 24px - zmniejszone z 26-32px */
    --fs-h5: 1.375rem;    /* 22px */
    --fs-h6: 1.25rem;     /* 20px */
    
    --fs-body: 1.25rem;   /* 20px */
    
    --paragraph-spacing: 1.25rem;
    --heading-margin-top: 2rem;
    --heading-margin-bottom: 1rem;
    --section-spacing: 4rem;
  }
}

/* ============================================
   DESKTOP PRAWDZIWY
   1367px+ landscape
   ============================================ */
@media (min-width: 1367px) and (orientation: landscape) {
  :root {
    /* Przywracamy większe wartości dla prawdziwego desktopu */
    --fs-h1: clamp(2.75rem, 1.5rem + 1.5vw, 3.25rem);
    --fs-h2: clamp(2.25rem, 1.25rem + 1.25vw, 2.625rem);
    --fs-h3: clamp(2rem, 1.125rem + 1.1vw, 2.25rem);
    --fs-h4: clamp(1.75rem, 1rem + 0.95vw, 2rem);
    
    --paragraph-spacing: 1.5rem;
    --heading-margin-top: 2.5rem;
    --section-spacing: 5rem;
  }
}

/* ============================================
   MAXIMUM SIZES (1600px+ container)
   Zabezpieczenie przed zbyt dużymi czcionkami
   SKORYGOWANE
   ============================================ */
@media (min-width: 1600px) {
  :root {
    --fs-h1: 3.25rem;     /* 52px - zmniejszone */
    --fs-h2: 2.625rem;    /* 42px - zmniejszone */
    --fs-h3: 2.25rem;     /* 36px - zmniejszone */
    --fs-h4: 2rem;        /* 32px - zmniejszone */
    --fs-h5: 1.875rem;    /* 30px */
    --fs-h6: 1.75rem;     /* 28px */
    
    --fs-body: 1.25rem;   /* 20px - maksimum */
    
    --section-spacing: 6rem; /* 96px */
  }
}

/* ============================================
   TYPOGRAPHY ELEMENTS
   ============================================ */

/* Reset */
h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--fw-bold);
}

/* Headings */
h1 {
  font-size: var(--fs-h1);
  font-weight: var(--fw-black);
  line-height: var(--lh-h1);
  letter-spacing: var(--ls-h1);
  margin-top: var(--heading-margin-top);
  margin-bottom: var(--heading-margin-bottom);
}

h1:first-child {
  margin-top: 0;
}

h2 {
  font-size: var(--fs-h2);
  font-weight: var(--fw-bold);
  line-height: var(--lh-h2);
  letter-spacing: var(--ls-h2);
  margin-top: var(--heading-margin-top);
  margin-bottom: var(--heading-margin-bottom);
}

h3 {
  font-size: var(--fs-h3);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-h3);
  letter-spacing: var(--ls-h3);
  margin-top: var(--heading-margin-top);
  margin-bottom: var(--heading-margin-bottom);
}

h4 {
  font-size: var(--fs-h4);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-h4);
  letter-spacing: var(--ls-h4);
  margin-bottom: var(--heading-margin-bottom);
}

h5 {
  font-size: var(--fs-h5);
  font-weight: var(--fw-medium);
  line-height: var(--lh-h5);
  margin-bottom: var(--heading-margin-bottom);
}

h6 {
  font-size: var(--fs-h6);
  font-weight: var(--fw-medium);
  line-height: var(--lh-h6);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--heading-margin-bottom);
}

/* Body */
body {
  font-family: var(--font-primary);
  font-size: var(--fs-body);
  font-weight: var(--fw-regular);
  line-height: var(--lh-body);
  letter-spacing: var(--ls-body);
}

/* Paragraphs */
p {
  margin: 0 0 var(--paragraph-spacing) 0;
}

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

/* Lead paragraph */
.lead,
p.lead {
  font-size: var(--fs-body-lg);
  line-height: var(--lh-body-relaxed);
  font-weight: var(--fw-regular);
}

/* Small text */
small,
.small {
  font-size: var(--fs-body-sm);
}

/* Lists */
ul, ol {
  margin: 0 0 var(--paragraph-spacing) 0;
  padding-left: 1.5em;
}

li {
  margin-bottom: 0.5em;
}

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

/* Blockquote */
blockquote {
  font-size: var(--fs-body-lg);
  font-style: italic;
  margin: var(--paragraph-spacing) 0;
  padding-left: 1.5em;
  border-left: 4px solid currentColor;
  opacity: 0.9;
}

/* Code */
code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: 0.125em 0.25em;
  background: rgba(0, 0, 0, 0.05);
  border-radius: 3px;
}

pre {
  font-family: var(--font-mono);
  font-size: var(--fs-body-sm);
  line-height: 1.6;
  padding: 1em;
  margin: var(--paragraph-spacing) 0;
  overflow-x: auto;
  background: rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

pre code {
  padding: 0;
  background: none;
}

/* HR */
hr {
  margin: calc(var(--section-spacing) * 0.75) 0;
  border: none;
  border-top: 1px solid currentColor;
  opacity: 0.2;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

/* Text sizes */
.text-xs { font-size: var(--fs-body-xs); }
.text-sm { font-size: var(--fs-body-sm); }
.text-base { font-size: var(--fs-body); }
.text-lg { font-size: var(--fs-body-lg); }

/* Font weights */
.font-light { font-weight: var(--fw-light); }
.font-regular { font-weight: var(--fw-regular); }
.font-medium { font-weight: var(--fw-medium); }
.font-semibold { font-weight: var(--fw-semibold); }
.font-bold { font-weight: var(--fw-bold); }

/* Line heights */
.leading-tight { line-height: var(--lh-h1); }
.leading-normal { line-height: var(--lh-body); }
.leading-relaxed { line-height: var(--lh-body-relaxed); }

/* Letter spacing */
.tracking-tight { letter-spacing: var(--ls-h1); }
.tracking-normal { letter-spacing: var(--ls-body); }
.tracking-wide { letter-spacing: var(--ls-body-wide); }

/* Prose container */
.prose {
  max-width: 65ch; /* Optymalna długość linii dla czytelności */
}

/* Flow - vertical rhythm */
.flow > * + * {
  margin-top: var(--paragraph-spacing);
}

.flow-lg > * + * {
  margin-top: calc(var(--paragraph-spacing) * 1.5);
}


/* ============================================
   BUTTONS SYSTEM
   ============================================ */

:root {
  /* Button Colors */
  --btn-primary-bg: #3498db;
  --btn-primary-hover: #2980b9;
  --btn-primary-text: #ffffff;
  
  --btn-ghost-border: #3498db;
  --btn-ghost-text: #3498db;
  --btn-ghost-hover-bg: #3498db;
  --btn-ghost-hover-text: #ffffff;
  
  --btn-link-text: #3498db;
  
  /* Button Sizing - Mobile first */
  --btn-padding-x: 1.1rem;      /* 17.6px */
  --btn-padding-y: 0.65rem;     /* 10.4px */
  --btn-font-size: 1rem;        /* 16px */
  --btn-border-radius: 0.4rem;  /* 6.4px */
  --btn-font-weight: 500;
  
  /* Button Shadows */
  --btn-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.12);
  --btn-shadow-hover: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  
  /* Button Transitions */
  --btn-transition: all 0.18s ease;
}

/* ============================================
   TABLET PORTRAIT (541px - 1023px)
   ============================================ */
@media (min-width: 541px) and (max-width: 1023px) {
  :root {
    --btn-padding-x: clamp(1.1rem, 0.9rem + 0.5vw, 1.5rem);
    --btn-padding-y: clamp(0.65rem, 0.55rem + 0.3vw, 0.875rem);
    --btn-font-size: clamp(1rem, 0.95rem + 0.2vw, 1.125rem);
  }
}

/* ============================================
   TABLET LANDSCAPE DUŻY (1024px - 1366px)
   ============================================ */
@media (min-width: 1024px) and (max-width: 1366px) and (orientation: landscape) {
  :root {
    --btn-padding-x: 1.375rem;    /* 22px */
    --btn-padding-y: 0.75rem;     /* 12px */
    --btn-font-size: 1.0625rem;   /* 17px */
  }
}

/* ============================================
   DESKTOP (1367px+)
   ============================================ */
@media (min-width: 1367px) and (orientation: landscape) {
  :root {
    --btn-padding-x: 1.5rem;      /* 24px */
    --btn-padding-y: 0.875rem;    /* 14px */
    --btn-font-size: 1.125rem;    /* 18px */
  }
}

/* ============================================
   BASE BUTTON STYLES
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem; /* Spacing dla ikon */
  
  padding: var(--btn-padding-y) var(--btn-padding-x);
  
  border: 1px solid transparent;
  border-radius: var(--btn-border-radius);
  
  font-family: var(--font-primary);
  font-size: var(--btn-font-size);
  font-weight: var(--btn-font-weight);
  line-height: 1.2;
  text-decoration: none;
  text-align: center;
  white-space: nowrap;
  
  cursor: pointer;
  user-select: none;
  
  transition: var(--btn-transition);
  box-shadow: var(--btn-shadow);
}

.btn:hover {
  box-shadow: var(--btn-shadow-hover);
  transform: translateY(-1px);
}

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

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

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

/* ============================================
   BUTTON VARIANTS
   ============================================ */

/* Primary Button */
.btn-primary {
  background-color: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  border-color: var(--btn-primary-bg);
}

.btn-primary:hover {
  background-color: var(--btn-primary-hover);
  border-color: var(--btn-primary-hover);
  filter: brightness(1.05);
}

/* Ghost Button */
.btn-ghost {
  background: transparent;
  color: var(--btn-ghost-text);
  border: 1px solid var(--btn-ghost-border);
}

.btn-ghost:hover {
  background: var(--btn-ghost-hover-bg);
  color: var(--btn-ghost-hover-text);
  border-color: var(--btn-ghost-hover-bg);
}

/* Text Link Button */
.btn-text-link {
  background: none;
  border: none;
  color: var(--btn-link-text);
  padding: 0.5rem 0;
  font-weight: 600;
  box-shadow: none;
}

.btn-text-link:hover {
  text-decoration: underline;
  box-shadow: none;
  transform: none;
}

/* ============================================
   BUTTON SIZES (opcjonalne)
   ============================================ */

.btn-sm {
  --btn-padding-x: 0.875rem;
  --btn-padding-y: 0.5rem;
  --btn-font-size: 0.875rem;
}

.btn-lg {
  --btn-padding-x: 1.75rem;
  --btn-padding-y: 1rem;
  --btn-font-size: 1.25rem;
}

/* ============================================
   BUTTON GROUPS
   ============================================ */

.btn-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

@media (max-width: 540px) {
  .btn-group {
    flex-direction: column;
  }
  
  .btn-group .btn {
    width: 100%;
  }
}

/* ============================================
   BUTTON WITH ICONS (opcjonalne)
   ============================================ */

.btn svg,
.btn i {
  width: 1.25em;
  height: 1.25em;
  flex-shrink: 0;
}