/* =============================================
   AI4IFS – styles.css
   Nowoczesny styl B2B SaaS / enterprise tech
   Ciemne tło, akcenty niebiesko-fioletowe
   ============================================= */

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

:root {
  --bg-deep:     #0a0d14;
  --bg-dark:     #0f1320;
  --bg-card:     #141928;
  --bg-alt:      #111623;
  --border:      rgba(99, 130, 255, 0.15);
  --accent-blue: #4f7cff;
  --accent-vio:  #8b5cf6;
  --accent-teal: #2dd4bf;
  --text-primary: #eef0f8;
  --text-muted:   #8891aa;
  --text-dim:     #555f7a;
  --gradient-hero: linear-gradient(135deg, #4f7cff 0%, #8b5cf6 100%);
  --gradient-card: linear-gradient(135deg, rgba(79,124,255,.12) 0%, rgba(139,92,246,.08) 100%);
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --radius: 14px;
  --shadow: 0 4px 32px rgba(0,0,0,.45);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; }

/* ---------- Typography ---------- */
h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); font-weight: 800; line-height: 1.15; }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); font-weight: 700; line-height: 1.2; }
h3 { font-size: 1.1rem; font-weight: 600; }
p  { color: var(--text-muted); }

/* ---------- Layout ---------- */
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}
.section-header p { margin-top: 12px; font-size: 1.05rem; }

/* ---------- Language Switcher ---------- */
.lang-switcher { display: flex; gap: 4px; align-items: center; }

.lang-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .5px;
  padding: 4px 9px;
  border-radius: 6px;
  cursor: pointer;
  transition: all .2s;
  font-family: var(--font);
}
.lang-btn:hover { border-color: var(--accent-blue); color: var(--accent-blue); }
.lang-btn.active { background: rgba(79,124,255,.15); border-color: var(--accent-blue); color: var(--accent-blue); }

.mobile-lang-switcher { display: flex; gap: 8px; margin-bottom: 20px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 8px;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .25s ease;
  border: none;
  white-space: nowrap;
  font-family: var(--font);
}
.btn-primary {
  background: var(--gradient-hero);
  color: #fff;
  box-shadow: 0 0 20px rgba(79,124,255,.35);
}
.btn-primary:hover { opacity: .88; transform: translateY(-2px); box-shadow: 0 4px 28px rgba(79,124,255,.5); }
.btn-outline { background: transparent; color: var(--accent-blue); border: 1.5px solid var(--accent-blue); }
.btn-outline:hover { background: rgba(79,124,255,.1); transform: translateY(-2px); }
.btn-white { background: #fff; color: var(--bg-deep); }
.btn-white:hover { background: #eef0f8; transform: translateY(-2px); }
.btn-full { width: 100%; padding: 15px 28px; font-size: 1.05rem; }
.btn-lg { padding: 16px 36px; font-size: 1rem; white-space: nowrap; }

/* ---------- HEADER ---------- */
#header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(10,13,20,.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background .3s;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo { font-size: 1.5rem; font-weight: 900; letter-spacing: -.5px; color: var(--text-primary); }
.logo span { color: var(--accent-blue); }
nav { display: flex; align-items: center; gap: 32px; }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { font-size: .92rem; color: var(--text-muted); transition: color .2s; }
.nav-links a:hover { color: var(--text-primary); }
.nav-cta { padding: 9px 22px; font-size: .9rem; }

/* Hamburger */
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: all .3s; }

/* Mobile nav */
.mobile-nav {
  display: none; position: fixed; top: 68px; left: 0; right: 0;
  background: var(--bg-dark);
  border-bottom: 1px solid var(--border);
  z-index: 99; padding: 24px;
}
.mobile-nav.open { display: block; }
.mobile-nav ul { display: flex; flex-direction: column; gap: 16px; }
.mobile-nav a { color: var(--text-muted); font-size: 1rem; transition: color .2s; }
.mobile-nav a:hover { color: var(--text-primary); }

/* ---------- HERO ---------- */
.hero { padding: 148px 0 0; position: relative; overflow: hidden; }
.hero::before {
  content: '';
  position: absolute; top: -120px; left: 50%; transform: translateX(-50%);
  width: 900px; height: 500px;
  background: radial-gradient(ellipse, rgba(79,124,255,.18) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; padding-bottom: 80px; }
.hero-badge {
  display: inline-block;
  background: rgba(79,124,255,.15); border: 1px solid rgba(79,124,255,.35);
  color: var(--accent-blue); font-size: .8rem; font-weight: 700;
  letter-spacing: 1.5px; text-transform: uppercase;
  padding: 5px 14px; border-radius: 20px; margin-bottom: 20px;
}
.hero-text h1 {
  margin-bottom: 20px;
  background: linear-gradient(135deg, #eef0f8 0%, #8b9dd4 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-sub { font-size: 1.1rem; color: var(--text-muted); max-width: 520px; margin-bottom: 36px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 40px; }
.hero-benefits { display: flex; flex-direction: column; gap: 10px; }
.hero-benefits li { display: flex; align-items: center; gap: 10px; font-size: .95rem; color: var(--text-muted); }
.check { color: var(--accent-teal); font-weight: 700; }

/* Hero visual */
.hero-visual { position: relative; display: flex; align-items: center; justify-content: center; }
.schema { display: flex; flex-direction: column; align-items: center; gap: 12px; position: relative; z-index: 1; }
.schema-node {
  padding: 18px 36px; border-radius: var(--radius);
  font-weight: 700; font-size: 1rem;
  border: 1.5px solid var(--border); background: var(--bg-card);
  min-width: 200px; text-align: center;
  backdrop-filter: blur(4px); transition: transform .3s;
}
.schema-node:hover { transform: scale(1.04); }
.node-ifs  { border-color: rgba(79,124,255,.5);  color: #7aa3ff; box-shadow: 0 0 18px rgba(79,124,255,.15); }
.node-api  { border-color: rgba(45,212,191,.5);  color: #2dd4bf; box-shadow: 0 0 18px rgba(45,212,191,.12); }
.node-ai   { border-color: rgba(139,92,246,.5);  color: #c4b5fd; box-shadow: 0 0 18px rgba(139,92,246,.15); }
.node-auto { border-color: rgba(251,191,36,.45); color: #fbbf24; box-shadow: 0 0 18px rgba(251,191,36,.1); }
.schema-arrow { font-size: 1.4rem; color: var(--text-dim); }
.schema-glow { position: absolute; inset: -40px; background: radial-gradient(ellipse, rgba(139,92,246,.14) 0%, transparent 70%); pointer-events: none; }

/* Hero stats bar */
.hero-stats {
  background: var(--bg-dark);
  border-top: 1px solid var(--border);
  padding: 32px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-item { text-align: center; }
.stat-top { display: flex; align-items: baseline; justify-content: center; gap: 2px; }
.stat-number {
  font-size: 2.4rem; font-weight: 900;
  background: var(--gradient-hero);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.stat-suffix { font-size: 1.4rem; font-weight: 800; color: var(--accent-blue); }
.stat-label { display: block; font-size: .85rem; color: var(--text-muted); margin-top: 4px; }

/* ---------- PAIN POINTS ---------- */
.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.pain-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}
.pain-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: rgba(248,113,113,.35); }
.pain-emoji { margin-bottom: 18px; display: block; color: var(--accent-blue); }
.pain-emoji .icon-svg { width: 44px; height: 44px; }
.pain-card h3 { margin-bottom: 12px; color: var(--text-primary); }

/* ---------- WHY US ---------- */
.whyus-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.whyus-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  background-image: var(--gradient-card);
  transition: transform .3s, box-shadow .3s;
}
.whyus-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.whyus-icon { margin-bottom: 18px; display: block; color: var(--accent-vio); }
.whyus-icon .icon-svg { width: 44px; height: 44px; }
.whyus-card h3 { margin-bottom: 12px; color: var(--text-primary); }

/* ---------- CARDS GRID (services) ---------- */
.cards-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; }
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  background-image: var(--gradient-card);
  transition: transform .3s, box-shadow .3s;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.card-icon { margin-bottom: 18px; }
.icon { display: block; flex-shrink: 0; }
.card-icon .icon { width: 36px; height: 36px; color: var(--accent-blue); }
.card:nth-child(2) .card-icon .icon { color: var(--accent-vio); }
.card:nth-child(3) .card-icon .icon { color: var(--accent-teal); }
.card:nth-child(4) .card-icon .icon { color: #fbbf24; }
.card h3 { margin-bottom: 10px; color: var(--text-primary); }

/* ---------- STEPS ---------- */
.steps { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr; gap: 8px; align-items: start; }
.step {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px 24px; text-align: center;
  transition: transform .3s, box-shadow .3s;
}
.step:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.step-number {
  font-size: 2.2rem; font-weight: 900;
  background: var(--gradient-hero);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  margin-bottom: 14px;
}
.step h3 { margin-bottom: 8px; color: var(--text-primary); }
.step p { font-size: .9rem; }
.step-connector {
  align-self: center; width: 32px; height: 2px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-vio));
  border-radius: 2px; flex-shrink: 0;
}

/* ---------- INDUSTRIES ---------- */
.industries-grid { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; margin-top: 8px; }
.industry-tag {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(79,124,255,.12); border: 1px solid rgba(79,124,255,.3);
  color: var(--accent-blue); padding: 10px 22px; border-radius: 50px;
  font-size: .95rem; font-weight: 600;
  transition: background .25s, color .25s, transform .2s;
  cursor: default;
}
.industry-tag:hover { background: rgba(79,124,255,.25); color: #fff; transform: translateY(-2px); }

/* ---------- EXAMPLES GRID ---------- */
.examples-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 14px; }
.example-item {
  display: flex; align-items: center; gap: 14px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 22px;
  font-size: .97rem; color: var(--text-muted);
  transition: border-color .25s, color .25s, transform .25s;
}
.example-item:hover { border-color: rgba(79,124,255,.4); color: var(--text-primary); transform: translateX(4px); }
.example-emoji { flex-shrink: 0; display: flex; align-items: center; color: var(--accent-teal); }
.example-emoji .icon-svg { width: 19px; height: 19px; }

/* ---------- FAQ ---------- */
.faq-container { max-width: 780px; }
.faq-list { display: flex; flex-direction: column; gap: 0; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item:first-child { border-top: 1px solid var(--border); }
.faq-question {
  width: 100%; display: flex; align-items: center; justify-content: space-between;
  background: transparent; border: none; cursor: pointer;
  padding: 22px 4px; text-align: left; gap: 16px;
  font-family: var(--font); font-size: 1rem; font-weight: 600;
  color: var(--text-primary); transition: color .2s;
}
.faq-question:hover { color: var(--accent-blue); }
.faq-question[aria-expanded="true"] { color: var(--accent-blue); }
.faq-icon {
  font-size: 1.5rem; font-weight: 300; color: var(--accent-blue);
  flex-shrink: 0; transition: transform .25s;
  line-height: 1;
}
.faq-question[aria-expanded="true"] .faq-icon { transform: rotate(45deg); }
.faq-answer { padding: 0 4px 22px; }
.faq-answer p { font-size: .97rem; line-height: 1.75; }

/* ---------- CTA BANNER ---------- */
.cta-banner {
  background: var(--gradient-hero);
  padding: 80px 0;
}
.cta-banner-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 40px; flex-wrap: wrap;
}
.cta-banner-inner h2 { color: #fff; margin-bottom: 10px; }
.cta-banner-inner p { color: rgba(255,255,255,.8); font-size: 1.05rem; max-width: 540px; }

/* ---------- CONTACT ---------- */
.contact-form {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 40px 36px;
  display: flex; flex-direction: column; gap: 20px;
  max-width: 700px; margin: 0 auto;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 7px; }
.form-group label { font-size: .85rem; font-weight: 600; color: var(--text-muted); letter-spacing: .3px; }
.form-group input, .form-group textarea {
  background: rgba(255,255,255,.04); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text-primary);
  padding: 11px 15px; font-family: var(--font); font-size: .95rem;
  transition: border-color .25s, box-shadow .25s;
  outline: none; resize: vertical;
}
.form-group input:focus, .form-group textarea:focus {
  border-color: var(--accent-blue); box-shadow: 0 0 0 3px rgba(79,124,255,.2);
}
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--text-dim); }
.form-success {
  display: none; background: rgba(45,212,191,.12);
  border: 1px solid rgba(45,212,191,.35); color: var(--accent-teal);
  border-radius: 8px; padding: 14px 18px; font-size: .95rem; text-align: center;
}
.form-success.visible { display: block; }

/* ---------- FOOTER ---------- */
.footer { background: var(--bg-dark); border-top: 1px solid var(--border); padding: 56px 0 32px; }
.footer-inner { display: flex; flex-direction: column; gap: 40px; }
.footer-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 40px; }
.footer-brand .logo { display: block; margin-bottom: 10px; }
.footer-tagline { font-size: .9rem; max-width: 300px; }
.footer-links { display: flex; gap: 56px; }
.footer-col { display: flex; flex-direction: column; gap: 12px; }
.footer-col-title { font-size: .78rem; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; color: var(--text-dim); }
.footer-col a { font-size: .9rem; color: var(--text-muted); transition: color .2s; }
.footer-col a:hover { color: var(--text-primary); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 28px; display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; }
.footer-disclaimer { font-size: .78rem; color: var(--text-dim); max-width: 500px; }
.footer-copy { font-size: .85rem; color: var(--text-dim); }

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .55s ease, transform .55s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

.pain-grid .reveal:nth-child(1) { transition-delay: .05s; }
.pain-grid .reveal:nth-child(2) { transition-delay: .12s; }
.pain-grid .reveal:nth-child(3) { transition-delay: .19s; }

.whyus-grid .reveal:nth-child(1) { transition-delay: .05s; }
.whyus-grid .reveal:nth-child(2) { transition-delay: .12s; }
.whyus-grid .reveal:nth-child(3) { transition-delay: .19s; }

.cards-grid .reveal:nth-child(1) { transition-delay: .05s; }
.cards-grid .reveal:nth-child(2) { transition-delay: .12s; }
.cards-grid .reveal:nth-child(3) { transition-delay: .19s; }
.cards-grid .reveal:nth-child(4) { transition-delay: .26s; }

.examples-grid .reveal:nth-child(1) { transition-delay: .03s; }
.examples-grid .reveal:nth-child(2) { transition-delay: .07s; }
.examples-grid .reveal:nth-child(3) { transition-delay: .11s; }
.examples-grid .reveal:nth-child(4) { transition-delay: .15s; }
.examples-grid .reveal:nth-child(5) { transition-delay: .19s; }
.examples-grid .reveal:nth-child(6) { transition-delay: .23s; }
.examples-grid .reveal:nth-child(7) { transition-delay: .27s; }
.examples-grid .reveal:nth-child(8) { transition-delay: .31s; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .nav-links, .nav-cta, .lang-switcher { display: none; }
  .hamburger { display: flex; }

  .hero-inner { grid-template-columns: 1fr; gap: 48px; padding-bottom: 64px; }
  .hero-visual { order: -1; }
  .schema { flex-direction: row; flex-wrap: wrap; justify-content: center; }
  .schema-node { min-width: 130px; padding: 14px 20px; font-size: .88rem; }
  .schema-arrow { display: flex; align-items: center; }

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

  .pain-grid, .whyus-grid { grid-template-columns: 1fr; }

  .steps { grid-template-columns: 1fr; }
  .step-connector { width: 2px; height: 24px; margin: 0 auto; }

  .footer-top { flex-direction: column; gap: 28px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 10px; }
}

@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .hero { padding-top: 120px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .form-row { grid-template-columns: 1fr; }
  .contact-form { padding: 28px 20px; }
  .cta-banner-inner { flex-direction: column; text-align: center; }
  .cta-banner-inner p { margin: 0 auto; }
  .footer-links { gap: 32px; }
}
/* =============================================
   AI4IFS – styles.css
   Nowoczesny styl B2B SaaS / enterprise tech
   Ciemne tło, akcenty niebiesko-fioletowe
   ============================================= */

/* ---------- Reset & Base ---------- */