/* ==============================================================================
   AXONFLOW — SYSTEM WIZUALNY "INK & AMBER"
   Strona internetowa marki konsultingowej dla firm produkcyjnych (50–250 pracowników)
   ============================================================================== */

/* ==============================================================================
   FONTY (self-hosted, warianty zmienne — subsety latin + latin-ext pod język polski)
   Pliki w /fonts/ ; źródło: Google Fonts (Inter, JetBrains Mono, Space Grotesk).
   ============================================================================== */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url('/fonts/inter-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC,
    U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url('/fonts/inter-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308,
    U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 100 800;
  font-display: swap;
  src: url('/fonts/jetbrains-mono-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC,
    U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 100 800;
  font-display: swap;
  src: url('/fonts/jetbrains-mono-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308,
    U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Space Grotesk';
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url('/fonts/space-grotesk-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC,
    U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Space Grotesk';
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url('/fonts/space-grotesk-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308,
    U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

:root {
  /* Paleta barw Sophisticated Dark (Ink & Amber) */
  --color-dark: #0B172A;
  --color-dark-surface: #16263A;
  --color-dark-subtle: #1C3048;
  --color-dark-overlay: rgba(22, 38, 58, 0.6);
  --color-paper: #F7F5EF;
  --color-surface: #FFFFFF;
  --color-text-primary: #142033;
  --color-text-secondary: #565E6B;
  --color-text-on-dark: #F7F5EF;
  --color-text-dim-on-dark: #8496A8;
  --color-border: #D9DEE3;
  --color-border-dark: #22374E;
  --color-border-dark-subtle: rgba(132, 150, 168, 0.2);
  --color-line: #8496A8;
  --color-accent: #D79A27;
  --color-accent-hover: #C2871A;
  --color-accent-subtle: rgba(215, 154, 39, 0.12);
  --color-accent-glow: rgba(215, 154, 39, 0.35);

  /* Typografia */
  --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Układ i siatka */
  --max-width: 1200px;
  --max-width-narrow: 840px;
  --header-height: 68px;
  --section-pad-y: 96px;
  --section-pad-y-sm: 64px;
}

/* ==============================================================================
   RESET & BAZOWE STYLE
   ============================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--color-text-primary);
  background-color: var(--color-paper);
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

/* Kontener siatkowy */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.container-narrow {
  width: 100%;
  max-width: var(--max-width-narrow);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* Dostępność: element widoczny tylko dla czytników ekranu */
.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;
}

/* ==============================================================================
   TYPOGRAFIA & OZNACZENIA TECHNICZNE
   ============================================================================== */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: inherit;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 20px;
  color: var(--color-line);
}

.section-tag .tag-dot {
  width: 6px;
  height: 6px;
  background-color: var(--color-accent);
  display: inline-block;
}

.section-dark .section-tag {
  color: var(--color-accent);
  letter-spacing: 0.25em;
}

/* Nagłówek sekcji (wspólny styl dla wszystkich sekcji narracyjnych) */
.section-headline {
  font-size: clamp(1.875rem, 3.5vw, 2.5rem);
  margin-bottom: 40px;
  color: inherit;
}

.section-dark .section-headline {
  color: var(--color-text-on-dark);
}

/* Linia akcentująca */
.accent-rule {
  display: inline-block;
  width: 32px;
  height: 1.5px;
  background-color: var(--color-accent);
  vertical-align: middle;
  margin-right: 8px;
}

/* Rytm sekcji */
.section {
  padding-top: var(--section-pad-y);
  padding-bottom: var(--section-pad-y);
  position: relative;
  border-bottom: 1px solid var(--color-border);
}

/* Rytm ciemnych sekcji — Sophisticated Dark z subtelnym wzorem siatki punktowej */
.section-dark {
  background-color: var(--color-dark);
  color: var(--color-text-on-dark);
  border-bottom: 1px solid var(--color-border-dark);
  position: relative;
}

.section-dark::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 2px 2px, rgba(132, 150, 168, 0.12) 1px, transparent 0);
  background-size: 24px 24px;
  pointer-events: none;
  z-index: 1;
}

.section-dark > .container {
  position: relative;
  z-index: 2;
}

.section-light {
  background-color: var(--color-paper);
  color: var(--color-text-primary);
}

/* ==============================================================================
   PRZYCISKI (Kanciaste, techniczne, Sophisticated Dark)
   ============================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 14px 28px;
  border: 1px solid transparent;
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-accent);
  color: #0B172A;
  border-color: var(--color-accent);
  box-shadow: 0 2px 10px rgba(215, 154, 39, 0.25);
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(215, 154, 39, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-dark {
  background-color: var(--color-dark);
  color: var(--color-text-on-dark);
  border-color: var(--color-dark);
}

.btn-dark:hover {
  background-color: var(--color-accent);
  color: #0B172A;
  border-color: var(--color-accent);
}

.btn-nav {
  padding: 9px 20px;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
}

/* Wariant kompaktowy (stopka) — zamiast stylu inline */
.btn-sm {
  padding: 10px 20px;
  font-size: 0.8125rem;
}

/* ==============================================================================
   SEKCJA 0: STICKY HEADER (TŁO JASNE / SOPHISTICATED DARK CONTRAST)
   ============================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
}

/* Pasek postępu przewijania na samej górze nagłówka */
.header-progress-track {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: rgba(11, 23, 42, 0.05);
  overflow: hidden;
  pointer-events: none;
  z-index: 101;
}

.header-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #D79A27 0%, #E8A838 60%, #D79A27 100%);
  box-shadow: 0 0 6px rgba(215, 154, 39, 0.5);
  transition: width 0.08s ease-out;
  will-change: width;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-dark);
}

.header-logo__symbol {
  height: 32px;
  width: auto;
}

.header-logo__wordmark {
  height: 20px;
  width: auto;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.header-nav > a {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-secondary);
  position: relative;
  transition: color 0.15s ease;
}

.header-nav > a:hover {
  color: var(--color-dark);
}

.header-nav > a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width 0.2s ease;
}

.header-nav > a:hover::after {
  width: 100%;
}

/* Przycisk CTA wewnątrz nawigacji — widoczny tylko w rozwiniętym menu mobilnym */
.header-nav .btn {
  display: none;
}

.header-cta-group .btn-nav {
  background-color: var(--color-dark);
  color: #FFFFFF;
  border-color: var(--color-dark);
  box-shadow: none;
}

.header-cta-group .btn-nav:hover {
  background-color: var(--color-accent);
  color: #0B172A;
  border-color: var(--color-accent);
}

/* Hamburger mobile */
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  padding: 8px;
  border-radius: 2px;
  cursor: pointer;
  color: var(--color-text-primary);
}

/* ==============================================================================
   SEKCJA 1: HERO (TŁO CIEMNE #0B172A) — układ jednokolumnowy
   ============================================================================== */
.hero-section {
  position: relative;
  overflow: hidden;
  padding-top: 120px;
  padding-bottom: 140px;
  background-color: var(--color-dark);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero-headline {
  font-size: clamp(2.25rem, 4.5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-text-on-dark);
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.hero-lead {
  font-size: clamp(1.125rem, 2vw, 1.25rem);
  line-height: 1.6;
  color: var(--color-text-dim-on-dark);
  margin-bottom: 40px;
  font-weight: 400;
}

.hero-cta-wrapper {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
}

/* ==============================================================================
   SEKCJA 2: OBJAWY (TŁO JASNE #F7F5EF)
   ============================================================================== */
.symptoms-section {
  background-color: var(--color-paper);
}

.symptoms-headline {
  font-size: clamp(1.875rem, 3.5vw, 2.5rem);
  margin-bottom: 40px;
  color: var(--color-text-primary);
}

.symptoms-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 48px;
}

.symptom-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 28px 28px 28px 24px;
  position: relative;
  border-radius: 2px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.symptom-card:hover {
  border-color: var(--color-line);
  transform: translateY(-2px);
}

.symptom-marker {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-accent);
  font-weight: 700;
  flex-shrink: 0;
  line-height: 1.6;
}

.symptom-text {
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--color-text-primary);
}

.symptoms-closing-box {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  padding: 32px;
  border-radius: 2px;
  max-width: var(--max-width-narrow);
}

.symptoms-closing-text {
  font-size: 1.125rem;
  line-height: 1.65;
  color: var(--color-text-primary);
  font-weight: 500;
}

/* ==============================================================================
   SEKCJA 3: DIAGNOZA (TŁO CIEMNE #0B172A)
   ============================================================================== */
.diagnosis-section {
  background-color: var(--color-dark);
}

.diagnosis-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.diagnosis-text-block {
  font-size: clamp(1.125rem, 1.8vw, 1.25rem);
  line-height: 1.7;
  color: var(--color-text-on-dark);
  font-weight: 400;
}

.illustration-frame {
  position: relative;
  background-color: var(--color-dark-surface);
  border: 1px solid var(--color-border-dark);
  border-radius: 2px;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
}

.illustration-frame img,
.illustration-frame svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.frame-tech-overlay {
  position: absolute;
  bottom: 12px;
  left: 12px;
  background-color: rgba(11, 23, 42, 0.85);
  border: 1px solid var(--color-border-dark);
  padding: 4px 8px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--color-line);
  letter-spacing: 0.05em;
}

/* ==============================================================================
   SEKCJA 4: MECHANIZM (TŁO JASNE #F7F5EF)
   ============================================================================== */
.mechanism-section {
  background-color: var(--color-paper);
}

.mechanism-wrapper {
  max-width: var(--max-width-narrow);
}

.mechanism-lead-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 48px;
  border-radius: 2px;
  position: relative;
}

.mechanism-lead-card::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 32px;
  width: 48px;
  height: 3px;
  background-color: var(--color-accent);
}

.mechanism-text {
  font-size: clamp(1.125rem, 2vw, 1.25rem);
  line-height: 1.75;
  color: var(--color-text-primary);
}

/* ==============================================================================
   SEKCJA 5: SPOSÓB PRACY AXONFLOW (TŁO CIEMNE #0B172A)
   ============================================================================== */
.method-section {
  background-color: var(--color-dark);
}

.method-intro {
  font-size: clamp(1.125rem, 1.8vw, 1.25rem);
  line-height: 1.7;
  color: var(--color-text-on-dark);
  margin-bottom: 56px;
  max-width: 780px;
}

.method-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
  margin-bottom: 56px;
}

.method-steps {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.step-card {
  background-color: var(--color-dark-surface);
  border: 1px solid var(--color-border-dark);
  padding: 28px 24px;
  border-radius: 2px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
  transition: all 0.2s ease;
  position: relative;
}

.step-card:hover {
  border-color: var(--color-accent);
  background-color: var(--color-dark-subtle);
  transform: translateX(4px);
}

.step-number {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-accent);
  background-color: rgba(215, 154, 39, 0.12);
  border: 1px solid rgba(215, 154, 39, 0.35);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border-radius: 2px;
}

.step-title {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-on-dark);
  margin-bottom: 6px;
}

.step-desc {
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--color-text-dim-on-dark);
}

.method-closing {
  background-color: var(--color-dark-surface);
  border: 1px solid var(--color-border-dark);
  border-left: 3px solid var(--color-accent);
  padding: 28px 32px;
  border-radius: 2px;
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-text-on-dark);
  max-width: var(--max-width-narrow);
}

/* ==============================================================================
   SEKCJA 6: DOWODY (TŁO JASNE #F7F5EF)
   ============================================================================== */
.evidence-section {
  background-color: var(--color-paper);
}

.evidence-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.evidence-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 2px;
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.evidence-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-accent);
  box-shadow: 0 8px 24px rgba(11, 23, 42, 0.06);
}

.evidence-card-header {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-line);
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.evidence-metric {
  font-family: var(--font-mono);
  font-size: 1.625rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.evidence-metric .metric-accent {
  color: var(--color-accent);
}

.evidence-text {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

/* ==============================================================================
   SEKCJA 7: OBSZARY POMOCY (TŁO JASNE / WYMÓG BITRIX24 BRONZE)
   ============================================================================== */
.services-section {
  background-color: var(--color-paper);
}

.services-headline {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  margin-bottom: 16px;
  color: var(--color-text-primary);
}

.services-subline {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  margin-bottom: 40px;
  max-width: 680px;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.service-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 2px;
  padding: 24px;
  position: relative;
  transition: border-color 0.2s ease;
}

.service-card:hover {
  border-color: var(--color-line);
}

.service-code {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--color-line);
  margin-bottom: 10px;
  display: block;
}

.service-title {
  font-family: var(--font-heading);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 10px;
  line-height: 1.35;
}

.service-desc {
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--color-text-secondary);
}

.services-principle-quote {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  padding: 24px 28px;
  border-radius: 2px;
  font-size: 1.0625rem;
  font-weight: 500;
  line-height: 1.6;
  color: var(--color-text-primary);
}

/* ==============================================================================
   SEKCJA 8: CTA KOŃCOWE (TŁO CIEMNE #0B172A)
   ============================================================================== */
.final-cta-section {
  background-color: var(--color-dark);
  padding-top: 100px;
  padding-bottom: 110px;
}

.final-cta-card {
  background-color: var(--color-dark-surface);
  border: 1px solid var(--color-border-dark);
  border-radius: 2px;
  padding: 56px 48px;
  position: relative;
  max-width: var(--max-width-narrow);
  margin: 0 auto;
}

.final-cta-card::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 48px;
  width: 56px;
  height: 3px;
  background-color: var(--color-accent);
}

.final-cta-body {
  font-size: clamp(1.0625rem, 1.7vw, 1.1875rem);
  line-height: 1.75;
  color: var(--color-text-on-dark);
  margin-bottom: 40px;
}

.final-cta-action {
  display: flex;
  align-items: center;
  gap: 24px;
}

/* ==============================================================================
   SEKCJA 9: STOPKA (TŁO JASNE/NEUTRALNE)
   ============================================================================== */
.site-footer {
  background-color: var(--color-paper);
  border-top: 1px solid var(--color-border);
  padding-top: 56px;
  padding-bottom: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand__logo {
  height: 22px;
  width: auto;
}

.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin-top: 16px;
  max-width: 320px;
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-line);
  margin-bottom: 16px;
}

.footer-contacts {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--color-text-primary);
}

.footer-contacts a {
  color: var(--color-text-primary);
  transition: color 0.15s ease;
}

.footer-contacts a:hover {
  color: var(--color-accent);
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.footer-contact-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-line);
  width: 65px;
  flex-shrink: 0;
}

.footer-cta-note {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

/* ==============================================================================
   SUBTELNE ANIMACJE SCROLL-REVEAL (IntersectionObserver)
   Progressive enhancement: ukrycie działa tylko przy aktywnym JS (klasa .js na <html>).
   Bez JS cała treść jest widoczna od razu.
   ============================================================================== */
.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.js .reveal.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Opóźnienia kaskadowe */
.js .reveal-delay-1 { transition-delay: 0.1s; }
.js .reveal-delay-2 { transition-delay: 0.2s; }
.js .reveal-delay-3 { transition-delay: 0.3s; }
.js .reveal-delay-4 { transition-delay: 0.4s; }

/* ==============================================================================
   PREFERENCJA OGRANICZONEGO RUCHU
   ============================================================================== */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .js .reveal,
  .js .reveal.is-revealed {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ==============================================================================
   RESPONSYWNOŚĆ (Desktop priorytet, pełna użyteczność mobile)
   ============================================================================== */
@media (max-width: 1024px) {
  .diagnosis-grid,
  .method-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .evidence-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --section-pad-y: 64px;
    --section-pad-y-sm: 48px;
  }

  .btn {
    white-space: normal;
    text-align: center;
  }

  /* Nawigacja mobilna w rozwijanym panelu */
  .header-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background-color: var(--color-paper);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    padding: 24px;
    gap: 20px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.06);
  }

  .header-nav.is-open {
    display: flex;
  }

  .header-nav.is-open .btn {
    display: inline-flex;
    margin-top: 4px;
  }

  /* Na mobile chowamy stały przycisk w pasku (CTA jest w rozwiniętym menu) */
  .header-cta-group {
    display: none;
  }

  /* Na mobile logo = sam wordmark */
  .header-logo__symbol {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .symptoms-list,
  .services-grid {
    grid-template-columns: 1fr;
  }

  .mechanism-lead-card,
  .final-cta-card {
    padding: 32px 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }
}