/* ==========================================================================
   Eko-Sphaera Biuro Ochrony Środowiska - Standalone Clean Stylesheet
   Pure CSS3, Fully Responsive, No Build Tools Needed, Works 100% Offline
   ========================================================================== */

:root {
  --primary: #047857;       /* Deep Emerald */
  --primary-hover: #065f46;
  --primary-light: #ecfdf5;
  --secondary: #0284c7;     /* Ocean / Clean Sky Blue */
  --secondary-light: #f0f9ff;
  --dark: #0f172a;          /* Slate 900 */
  --slate-700: #334155;
  --slate-500: #64748b;
  --slate-200: #e2e8f0;
  --slate-100: #f1f5f9;
  --bg-light: #f8fafc;
  --white: #ffffff;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --font-family: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-family: var(--font-family);
  background-color: var(--bg-light);
  color: var(--dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

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

.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* ==========================================================================
   Navigation Bar
   ========================================================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--slate-200);
  transition: all 0.2s ease;
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  height: 76px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-logo {
  height: 48px;
  width: auto;
  object-fit: contain;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--slate-700);
  white-space: nowrap;
  transition: color 0.15s ease;
  position: relative;
}

.nav-link:hover {
  color: var(--primary);
}

.header-action {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--white);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(4, 120, 87, 0.25);
}

.btn-secondary {
  background-color: var(--white);
  color: var(--dark);
  border-color: var(--slate-200);
}

.btn-secondary:hover {
  background-color: var(--slate-100);
  border-color: var(--slate-500);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--dark);
  padding: 8px;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  padding: 72px 0 60px;
  position: relative;
  background: linear-gradient(180deg, #ffffff 0%, var(--bg-light) 100%);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-kicker {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--primary);
  margin-bottom: 12px;
}

.hero-title {
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--dark);
  letter-spacing: -0.025em;
  margin-bottom: 20px;
  text-wrap: balance;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--slate-700);
  line-height: 1.65;
  margin-bottom: 32px;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 40px;
}

.hero-card {
  background-color: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-md);
}

.hero-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--dark);
}

.hero-card-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.hero-card-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.9375rem;
  color: var(--slate-700);
}

.check-icon {
  color: var(--primary);
  flex-shrink: 0;
  margin-top: 3px;
  font-weight: bold;
}

/* ==========================================================================
   Trust Bar / Key Metrics
   ========================================================================== */
.trust-bar {
  padding: 24px 0;
  background-color: var(--white);
  border-top: 1px solid var(--slate-200);
  border-bottom: 1px solid var(--slate-200);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.trust-item {
  text-align: center;
  padding: 8px 12px;
}

.trust-number {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.trust-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--slate-700);
  margin-top: 4px;
}

/* ==========================================================================
   Section Common
   ========================================================================== */
.section {
  padding: 80px 0;
}

.section-alt {
  background-color: var(--white);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-kicker {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.section-title {
  font-size: clamp(1.875rem, 3vw, 2.5rem);
  font-weight: 800;
  color: var(--dark);
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 14px;
  text-wrap: balance;
}

.section-subtitle {
  font-size: 1.0625rem;
  color: var(--slate-700);
}

/* ==========================================================================
   Interactive Calculator Section
   ========================================================================== */
.calc-box {
  background-color: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-sm);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
}

.calc-options-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--dark);
}

.industry-select {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.radio-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.15s ease;
  font-weight: 500;
  font-size: 0.9375rem;
}

.radio-card:hover {
  border-color: var(--primary);
  background-color: var(--primary-light);
}

.radio-card.active {
  border-color: var(--primary);
  background-color: var(--primary-light);
  font-weight: 700;
  color: var(--primary);
}

.calc-result-panel {
  background-color: var(--slate-100);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.calc-result-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 12px;
}

.calc-checklist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.calc-checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9375rem;
  color: var(--slate-700);
}

/* ==========================================================================
   Services Grid
   ========================================================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  background-color: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.service-num {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.service-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 12px;
  line-height: 1.3;
}

.service-desc {
  font-size: 0.9375rem;
  color: var(--slate-700);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.service-tags {
  font-size: 0.8125rem;
  color: var(--slate-500);
  border-top: 1px solid var(--slate-100);
  padding-top: 14px;
}

/* ==========================================================================
   Why Us & Process
   ========================================================================== */
.why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.why-card {
  background-color: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  padding: 28px;
}

.why-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 10px;
}

.why-desc {
  font-size: 0.9375rem;
  color: var(--slate-700);
  line-height: 1.6;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.step-card {
  position: relative;
  background-color: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  padding: 24px;
}

.step-badge {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  margin-bottom: 12px;
  line-height: 1;
}

.step-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 8px;
}

.step-desc {
  font-size: 0.875rem;
  color: var(--slate-700);
  line-height: 1.55;
}

/* ==========================================================================
   FAQ Section
   ========================================================================== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background-color: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.15s ease;
}

.faq-item:hover {
  border-color: var(--slate-500);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 20px 24px;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--dark);
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.faq-icon {
  font-size: 1.25rem;
  color: var(--primary);
  transition: transform 0.2s ease;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  display: none;
  padding: 0 24px 20px;
  font-size: 0.9375rem;
  color: var(--slate-700);
  line-height: 1.65;
}

.faq-item.open .faq-answer {
  display: block;
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
}

.contact-info-card {
  background-color: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.contact-info-title {
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 20px;
}

.contact-method {
  display: flex;
  flex-direction: column;
  margin-bottom: 20px;
}

.contact-label {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--slate-500);
  margin-bottom: 4px;
}

.contact-val {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--dark);
}

.contact-val a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.contact-form-card {
  background-color: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-sm);
}

.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--slate-700);
  margin-bottom: 6px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 11px 14px;
  font-size: 0.9375rem;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  background-color: var(--bg-light);
  color: var(--dark);
  transition: all 0.15s ease;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  background-color: var(--white);
  box-shadow: 0 0 0 3px rgba(4, 120, 87, 0.15);
}

.form-checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.8125rem;
  color: var(--slate-700);
  cursor: pointer;
  line-height: 1.45;
}

.form-checkbox-label input {
  margin-top: 3px;
  accent-color: var(--primary);
}

.form-checkbox-label a {
  color: var(--primary);
  text-decoration: underline;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background-color: var(--dark);
  color: var(--white);
  padding: 60px 0 30px;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--white);
}

.footer-text {
  font-size: 0.875rem;
  color: #94a3b8;
  line-height: 1.6;
  max-width: 440px;
}

.footer-title {
  font-size: 0.9375rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
  color: #cbd5e1;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  font-size: 0.875rem;
  color: #94a3b8;
  transition: color 0.15s ease;
}

.footer-link:hover {
  color: var(--white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.8125rem;
  color: #64748b;
}

/* ==========================================================================
   Cookie Banner
   ========================================================================== */
.cookie-banner {
  position: fixed;
  bottom: 20px;
  left: 20px;
  right: 20px;
  max-width: 600px;
  background-color: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: var(--shadow-lg);
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 16px;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from { transform: translateY(40px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.cookie-text {
  font-size: 0.875rem;
  color: var(--slate-700);
  line-height: 1.5;
}

.cookie-text a {
  color: var(--primary);
  text-decoration: underline;
}

.cookie-buttons {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  flex-wrap: wrap;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .calc-box {
    grid-template-columns: 1fr;
  }
  .why-grid {
    grid-template-columns: 1fr;
  }
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: block;
  }
  .nav-menu {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background-color: var(--white);
    border-bottom: 1px solid var(--slate-200);
    padding: 20px;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    box-shadow: var(--shadow-md);
  }
  .nav-menu.active {
    display: flex;
  }
  .services-grid {
    grid-template-columns: 1fr;
  }
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .trust-grid {
    grid-template-columns: 1fr 1fr;
  }
  .hero {
    padding: 40px 0;
  }
  .section {
    padding: 56px 0;
  }
}