/* =========================================
   PGMB — style.css
   Mobile-first, pure CSS3, no libraries
   ========================================= */

/* --- CSS Variables --- */
:root {
  --color-bg:           #111418;
  --color-surface:      #1c2128;
  --color-surface-alt:  #242b34;
  --color-text:         #e8ecf0;
  --color-muted:        #8b99a8;
  --color-primary:      #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-accent:       #ef4444;
  --color-border:       #2e3640;
  --color-border-light: #3a4452;
  --shadow-card:        0 2px 12px rgba(0,0,0,.45);
  --shadow-hover:       0 6px 24px rgba(0,0,0,.6);
  --radius-card:        10px;
  --font-base:          'Segoe UI', system-ui, -apple-system, sans-serif;
  --transition:         0.22s ease;
  --max-w:              1200px;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-base);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: #60a5fa; }
a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: 3px;
}

/* --- SVG Icons --- */
.icon {
  width: 1.4em;
  height: 1.4em;
  fill: currentColor;
  flex-shrink: 0;
  vertical-align: middle;
}

.icon-lg {
  width: 2.2rem;
  height: 2.2rem;
}

/* --- SVG Sprite (hidden) --- */
.svg-sprite { display: none; }

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.1rem;
}

section { padding: 3.5rem 0; }

/* --- Typography --- */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(1.75rem, 5vw, 3rem); }
h2 { font-size: clamp(1.4rem, 3.5vw, 2.1rem); }
h3 { font-size: clamp(1.05rem, 2.5vw, 1.3rem); }

.section-title {
  text-align: center;
  margin-bottom: 0.5rem;
}

.section-sub {
  text-align: center;
  color: var(--color-muted);
  font-size: 1.05rem;
  margin-bottom: 2.5rem;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Badges / Labels --- */
.badge {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: .25rem .7rem;
  border-radius: 4px;
  margin-bottom: .9rem;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .75rem 1.5rem;
  border-radius: 6px;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 3px;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: #fff;
  box-shadow: 0 4px 16px rgba(37,99,235,.45);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,.35);
}
.btn-outline:hover {
  background: rgba(255,255,255,.08);
  border-color: rgba(255,255,255,.7);
  color: #fff;
  transform: translateY(-1px);
}

.btn-accent {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.btn-accent:hover {
  background: #dc2626;
  border-color: #dc2626;
  color: #fff;
  box-shadow: 0 4px 16px rgba(239,68,68,.4);
  transform: translateY(-1px);
}

/* =========================================
   HEADER / NAV
   ========================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(17,20,24,.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .85rem 1.1rem;
  max-width: var(--max-w);
  margin: 0 auto;
  gap: 1rem;
}

.logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-name {
  font-size: 1.55rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: .04em;
  line-height: 1;
}

.logo-name span { color: var(--color-primary); }

.logo-tagline {
  font-size: .68rem;
  color: var(--color-muted);
  letter-spacing: .06em;
  text-transform: uppercase;
  margin-top: .12rem;
}

/* Hamburger */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.2rem;
  height: 2.2rem;
  background: none;
  border: none;
  cursor: pointer;
  padding: .2rem;
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Nav */
.site-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem;
}

.site-nav.open { display: block; }

.nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: .25rem;
}

.nav-list a {
  display: block;
  padding: .6rem .8rem;
  color: var(--color-text);
  font-weight: 500;
  border-radius: 6px;
  transition: background var(--transition), color var(--transition);
}

.nav-list a:hover,
.nav-list a[aria-current="page"] {
  background: var(--color-surface-alt);
  color: #fff;
}

.nav-cta {
  margin-top: .75rem;
  padding-top: .75rem;
  border-top: 1px solid var(--color-border);
}

.nav-cta .btn { width: 100%; justify-content: center; }

/* =========================================
   HERO
   ========================================= */
.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  background:
    linear-gradient(135deg, rgba(17,20,24,.92) 0%, rgba(28,33,40,.78) 60%, rgba(37,99,235,.12) 100%),
    repeating-linear-gradient(
      -45deg,
      transparent,
      transparent 20px,
      rgba(255,255,255,.012) 20px,
      rgba(255,255,255,.012) 40px
    );
  overflow: hidden;
  padding: 4rem 0 3rem;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 70% 50%, rgba(37,99,235,.09) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero h1 {
  margin-bottom: 1rem;
  color: #fff;
}

.hero h1 em {
  font-style: normal;
  color: #60a5fa;
}

.hero-sub {
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  color: rgba(232,236,240,.78);
  margin-bottom: 2rem;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

/* =========================================
   CARDS GRID
   ========================================= */
.cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.1rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 1.5rem;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  box-shadow: var(--shadow-card);
}

.card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.card-icon {
  color: var(--color-primary);
  margin-bottom: .85rem;
}

.card h3 { margin-bottom: .4rem; color: #fff; }
.card p  { color: var(--color-muted); font-size: .93rem; }

/* =========================================
   HOW WE WORK
   ========================================= */
.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  counter-reset: step;
}

.step {
  display: flex;
  gap: 1.1rem;
  align-items: flex-start;
}

.step-num {
  flex-shrink: 0;
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-weight: 800;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-body h3 { margin-bottom: .3rem; color: #fff; }
.step-body p  { color: var(--color-muted); font-size: .93rem; }

/* =========================================
   FOR WHOM
   ========================================= */
.audience-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .85rem;
}

.audience-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 1rem 1.1rem;
  display: flex;
  align-items: center;
  gap: .7rem;
  font-weight: 500;
  transition: border-color var(--transition);
}

.audience-item:hover { border-color: var(--color-primary); }

.audience-item .icon { color: var(--color-primary); }

/* =========================================
   TRUST / CTA BAND
   ========================================= */
.cta-band {
  background: linear-gradient(135deg, var(--color-primary) 0%, #1d4ed8 100%);
  padding: 3rem 0;
}

.cta-band-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.25rem;
}

.cta-band h2 { color: #fff; }
.cta-band p  { color: rgba(255,255,255,.8); max-width: 520px; }

.cta-band-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  justify-content: center;
}

/* =========================================
   CONTACT INFO SECTION
   ========================================= */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: .9rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 1.2rem 1.3rem;
}

.contact-item .icon-lg { color: var(--color-primary); flex-shrink: 0; }

.contact-item-body small {
  display: block;
  color: var(--color-muted);
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: .2rem;
}

.contact-item-body strong {
  display: block;
  font-size: 1.05rem;
  color: #fff;
}

/* =========================================
   OFFER PAGE
   ========================================= */
.offer-group { margin-bottom: 3rem; }

.offer-group h2 {
  border-left: 4px solid var(--color-primary);
  padding-left: .85rem;
  margin-bottom: 1.2rem;
}

.offer-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: .6rem;
}

.offer-list li {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: .75rem 1rem;
  display: flex;
  align-items: center;
  gap: .6rem;
  font-size: .95rem;
  transition: border-color var(--transition);
}

.offer-list li:hover { border-color: var(--color-primary); }
.offer-list li .icon { color: var(--color-primary); flex-shrink: 0; }

.class-badges {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: .75rem;
}

.class-badge {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border-light);
  color: var(--color-text);
  font-size: .82rem;
  font-weight: 600;
  padding: .28rem .65rem;
  border-radius: 5px;
}

/* =========================================
   ABOUT PAGE
   ========================================= */
.about-values {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.value-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 1.3rem 1.4rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.value-item .icon-lg { color: var(--color-primary); flex-shrink: 0; }
.value-item h3 { margin-bottom: .3rem; color: #fff; }
.value-item p  { color: var(--color-muted); font-size: .93rem; }

/* =========================================
   REALIZACJE
   ========================================= */
.realizacje-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.1rem;
}

.realizacja-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 1.4rem 1.5rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.realizacja-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-hover);
}

.realizacja-card .card-icon { color: var(--color-primary); margin-bottom: .7rem; }
.realizacja-card h3 { margin-bottom: .4rem; color: #fff; }
.realizacja-card p  { color: var(--color-muted); font-size: .92rem; }

/* =========================================
   CONTACT FORM PAGE
   ========================================= */
.contact-page-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

.form-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 1.8rem;
}

.form-card h2 {
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: .6rem;
}
.form-card h2 .icon { color: var(--color-primary); }

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: .35rem;
}

.form-group label {
  font-size: .85rem;
  font-weight: 600;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: .05em;
}

.form-group label .req { color: var(--color-accent); margin-left: .15rem; }

.form-group input,
.form-group select,
.form-group textarea {
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: 6px;
  color: var(--color-text);
  font-family: var(--font-base);
  font-size: .95rem;
  padding: .7rem .9rem;
  width: 100%;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.2);
}

.form-group textarea { resize: vertical; min-height: 110px; }

.form-group select option { background: var(--color-bg); }

.form-note {
  font-size: .82rem;
  color: var(--color-muted);
  margin-top: 1rem;
}

.form-submit { margin-top: 1.25rem; }
.form-submit .btn { width: 100%; justify-content: center; }

/* Hint box */
.hint-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-card);
  padding: 1.4rem 1.5rem;
}

.hint-box h3 {
  margin-bottom: .85rem;
  color: #fff;
  display: flex;
  align-items: center;
  gap: .5rem;
}
.hint-box h3 .icon { color: var(--color-primary); }

.hint-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: .55rem;
}

.hint-list li {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-size: .93rem;
  color: var(--color-muted);
}

.hint-list li .icon { color: var(--color-primary); flex-shrink: 0; }

/* =========================================
   PAGE HERO (inner pages)
   ========================================= */
.page-hero {
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-surface-alt) 100%);
  border-bottom: 1px solid var(--color-border);
  padding: 3rem 0 2.5rem;
}

.page-hero .badge { margin-bottom: .8rem; }
.page-hero h1 { margin-bottom: .6rem; }
.page-hero p  { color: var(--color-muted); max-width: 600px; font-size: 1.05rem; }

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: .4rem;
  font-size: .82rem;
  color: var(--color-muted);
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.breadcrumb a { color: var(--color-muted); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb-sep { color: var(--color-border-light); }

/* =========================================
   FOOTER
   ========================================= */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 3rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.footer-brand .logo-name { font-size: 1.4rem; }
.footer-brand p { color: var(--color-muted); font-size: .9rem; margin-top: .7rem; max-width: 260px; }

.footer-col h4 {
  font-size: .82rem;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--color-muted);
  margin-bottom: .85rem;
}

.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: .4rem; }
.footer-col ul li a { color: var(--color-muted); font-size: .9rem; transition: color var(--transition); }
.footer-col ul li a:hover { color: var(--color-text); }

.footer-contact-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: .55rem;
}

.footer-contact-list li {
  display: flex;
  align-items: center;
  gap: .55rem;
  font-size: .9rem;
  color: var(--color-muted);
}

.footer-contact-list li .icon { color: var(--color-primary); flex-shrink: 0; }
.footer-contact-list li a { color: var(--color-muted); }
.footer-contact-list li a:hover { color: var(--color-text); }

.footer-bottom {
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: .5rem;
  align-items: flex-start;
}

.footer-bottom p { color: var(--color-muted); font-size: .82rem; }
.footer-bottom a { color: var(--color-muted); }
.footer-bottom a:hover { color: var(--color-text); }

/* =========================================
   SECTION BG VARIANTS
   ========================================= */
.bg-surface { background: var(--color-surface); }
.bg-alt     { background: var(--color-surface-alt); }

/* =========================================
   DIVIDERS
   ========================================= */
.section-divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 0;
}

/* =========================================
   SKIP LINK (accessibility)
   ========================================= */
.skip-link {
  position: absolute;
  top: -9999px;
  left: 1rem;
  background: var(--color-primary);
  color: #fff;
  padding: .5rem 1rem;
  border-radius: 4px;
  z-index: 9999;
  font-weight: 600;
}

.skip-link:focus { top: 1rem; }

/* =========================================
   PROSE (descriptive text blocks)
   ========================================= */
.prose {
  max-width: 780px;
  color: var(--color-muted);
}

.prose p { margin-bottom: .85rem; }
.prose p:last-child { margin-bottom: 0; }

/* =========================================
   MEDIA QUERIES
   ========================================= */

/* ≥480px */
@media (min-width: 480px) {
  .cards-grid        { grid-template-columns: repeat(2, 1fr); }
  .contact-grid      { grid-template-columns: repeat(2, 1fr); }
  .realizacje-grid   { grid-template-columns: repeat(2, 1fr); }
  .offer-list        { grid-template-columns: repeat(2, 1fr); }
  .form-row.two-col  { grid-template-columns: repeat(2, 1fr); }
}

/* ≥768px */
@media (min-width: 768px) {
  section { padding: 5rem 0; }

  /* Nav desktop */
  .nav-toggle { display: none; }

  .site-nav {
    display: flex !important;
    position: static;
    background: none;
    border: none;
    padding: 0;
    align-items: center;
    gap: 1rem;
  }

  .nav-list {
    flex-direction: row;
    gap: 0;
  }

  .nav-list a {
    padding: .45rem .8rem;
    font-size: .92rem;
  }

  .nav-cta {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
  }

  .nav-cta .btn { width: auto; }

  /* Cards */
  .cards-grid        { grid-template-columns: repeat(3, 1fr); }
  .audience-grid     { grid-template-columns: repeat(3, 1fr); }
  .contact-grid      { grid-template-columns: repeat(2, 1fr); }
  .about-values      { grid-template-columns: repeat(2, 1fr); }
  .realizacje-grid   { grid-template-columns: repeat(3, 1fr); }
  .steps             { grid-template-columns: repeat(2, 1fr); }

  /* Footer */
  .footer-grid { grid-template-columns: 1.6fr 1fr 1fr 1.4fr; }
  .footer-bottom { flex-direction: row; justify-content: space-between; }

  /* Contact page */
  .contact-page-grid { grid-template-columns: 1.6fr 1fr; }
}

/* ≥1024px */
@media (min-width: 1024px) {
  .cards-grid      { grid-template-columns: repeat(4, 1fr); }
  .steps           { grid-template-columns: repeat(4, 1fr); }
  .contact-grid    { grid-template-columns: repeat(4, 1fr); }
}