/* =========================================
   BimEnerg — Professional Stylesheet
   ========================================= */

/* Custom Properties */
:root {
  --primary:       #0B66A4;
  --primary-dark:  #0a5490;
  --primary-light: #e8f4fd;
  --accent:        #00A86B;
  --accent-dark:   #009060;
  --neutral:       #1a2332;
  --text:          #374151;
  --muted:         #6b7280;
  --bg:            #ffffff;
  --surface:       #f7f9fb;
  --border:        #e5e7eb;
  --shadow-sm:     0 1px 3px rgba(0,0,0,.08);
  --shadow:        0 4px 16px rgba(0,0,0,.10);
  --shadow-lg:     0 8px 32px rgba(0,0,0,.15);
  --radius:        10px;
  --radius-lg:     16px;
  --t:             .2s ease;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  font-size: 16px;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* Layout */
.container { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.section { padding: 72px 0; }
.section-alt { background: var(--surface); }

/* Typography helpers */
.section-label {
  display: inline-block;
  color: var(--primary);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.section-title {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 700;
  color: var(--neutral);
  margin-bottom: 12px;
  line-height: 1.25;
}
.section-sub { font-size: 1.05rem; color: var(--muted); max-width: 520px; }
.section-head { margin-bottom: 48px; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 22px;
  border-radius: 8px;
  font-size: .95rem;
  font-weight: 600;
  font-family: inherit;
  border: none;
  cursor: pointer;
  line-height: 1;
  white-space: nowrap;
  transition: transform var(--t), box-shadow var(--t), background var(--t);
}
.btn:active { transform: scale(.98); }
.btn.primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 14px rgba(0,168,107,.35);
}
.btn.primary:hover {
  background: var(--accent-dark);
  box-shadow: 0 6px 20px rgba(0,168,107,.45);
  transform: translateY(-1px);
}
.btn.secondary {
  background: rgba(255,255,255,.15);
  color: #fff;
  border: 1.5px solid rgba(255,255,255,.4);
}
.btn.secondary:hover { background: rgba(255,255,255,.25); }
.btn.outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}
.btn.outline:hover { background: var(--primary-light); }

/* ===== HEADER ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  padding-top: 0;
  padding-bottom: 0;
}
.brand img { height: 48px; width: auto; }
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  padding: 8px 14px;
  border-radius: 6px;
  color: var(--text);
  font-weight: 500;
  font-size: .9rem;
  transition: background var(--t), color var(--t);
}
.main-nav a:hover { background: var(--primary-light); color: var(--primary); }
.main-nav .nav-cta {
  background: var(--primary);
  color: #fff;
  padding: 9px 18px;
  border-radius: 8px;
  font-weight: 600;
  margin-left: 8px;
}
.main-nav .nav-cta:hover { background: var(--primary-dark); color: #fff; }

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}
.nav-toggle span {
  display: block;
  height: 2.5px;
  background: var(--neutral);
  border-radius: 2px;
  transition: transform var(--t), opacity var(--t);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(8.75px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-8.75px) rotate(-45deg); }

/* ===== HERO (homepage) ===== */
.hero {
  background: linear-gradient(135deg, #0a3d62 0%, #0B66A4 55%, #1a7fc4 100%);
  color: #fff;
  padding: 80px 0 72px;
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: '';
  position: absolute;
  right: -140px;
  top: -100px;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  background: rgba(255,255,255,.04);
  pointer-events: none;
}
.hero .container { position: relative; z-index: 1; }
.hero-badge {
  display: inline-block;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.25);
  color: #cce6ff;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  max-width: 640px;
}
.hero p {
  font-size: 1.1rem;
  color: rgba(255,255,255,.82);
  max-width: 560px;
  margin-bottom: 32px;
}
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; }

/* Page hero (inner pages) */
.page-hero {
  background: linear-gradient(135deg, #0a3d62 0%, var(--primary) 100%);
  color: #fff;
  padding: 52px 0 44px;
}
.page-hero h1 {
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 10px;
  line-height: 1.2;
}
.page-hero p { color: rgba(255,255,255,.8); font-size: 1.05rem; max-width: 560px; }

/* ===== SERVICES GRID ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.service-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: box-shadow var(--t), transform var(--t), border-color var(--t);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.service-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  border-color: var(--primary);
}
.service-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}
.service-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--neutral); }
.service-card p { font-size: .9rem; color: var(--muted); flex: 1; }
.card-link {
  font-size: .9rem;
  font-weight: 600;
  color: var(--primary);
  margin-top: 4px;
  display: inline-block;
  transition: letter-spacing var(--t);
}
.service-card:hover .card-link { letter-spacing: .02em; }

/* ===== STATS ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  text-align: center;
}
.stat {
  padding: 32px 24px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}
.stat-val {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 6px;
}
.stat-label { font-size: .88rem; color: var(--muted); font-weight: 500; }

/* ===== CTA BANNER ===== */
.cta-banner {
  background: linear-gradient(135deg, #0a3d62 0%, var(--primary) 100%);
  border-radius: var(--radius-lg);
  padding: 48px 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.cta-banner h2 { color: #fff; font-size: 1.5rem; font-weight: 700; margin-bottom: 6px; }
.cta-banner p { color: rgba(255,255,255,.78); }

/* ===== CONTENT SECTIONS (inner pages) ===== */
.content-section { padding: 60px 0; }
.scope-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 36px;
}
.scope-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: .93rem;
  padding: 16px;
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  line-height: 1.5;
}
.scope-list li::before { content: '✓'; color: var(--accent); font-weight: 700; flex-shrink: 0; margin-top: 1px; }

/* ===== CONTACT ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.contact-form label {
  font-size: .85rem;
  font-weight: 600;
  color: var(--neutral);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.contact-form input,
.contact-form textarea {
  padding: 11px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: .95rem;
  font-family: inherit;
  color: var(--text);
  background: var(--bg);
  transition: border-color var(--t), box-shadow var(--t);
  outline: none;
  width: 100%;
}
.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(11,102,164,.1);
}
.contact-form textarea { min-height: 130px; resize: vertical; }
.contact-form button { align-self: flex-start; }
.contact-info h3 { font-size: 1.2rem; font-weight: 700; color: var(--neutral); margin-bottom: 24px; }
.ci-item { display: flex; gap: 14px; margin-bottom: 18px; align-items: flex-start; }
.ci-label {
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--primary);
  width: 60px;
  flex-shrink: 0;
  padding-top: 3px;
}
.ci-value { font-size: .93rem; color: var(--text); line-height: 1.6; }
.ci-value a { color: var(--primary); }
.ci-value a:hover { text-decoration: underline; }

/* ===== ABOUT ===== */
.about-intro { font-size: 1.1rem; color: var(--muted); max-width: 620px; margin-bottom: 48px; line-height: 1.8; }
.values-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.value-card {
  padding: 24px 20px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}
.value-card .v-icon { font-size: 1.6rem; margin-bottom: 10px; }
.value-card h4 { font-weight: 700; color: var(--neutral); margin-bottom: 6px; }
.value-card p { font-size: .88rem; color: var(--muted); line-height: 1.6; }

/* ===== SUCCESS PAGE ===== */
.success-block {
  text-align: center;
  padding: 100px 20px;
  max-width: 480px;
  margin: 0 auto;
}
.success-icon { font-size: 3.5rem; margin-bottom: 20px; }
.success-block h1 { font-size: 1.9rem; font-weight: 700; color: var(--neutral); margin-bottom: 12px; }
.success-block p { color: var(--muted); margin-bottom: 28px; }

/* ===== FOOTER ===== */
.site-footer {
  background: var(--neutral);
  color: rgba(255,255,255,.7);
  padding: 56px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand img {
  height: 40px;
  width: auto;
  margin-bottom: 16px;
  filter: brightness(0) invert(1);
  opacity: .85;
}
.footer-brand p { font-size: .88rem; max-width: 260px; line-height: 1.7; }
.footer-col h4 {
  color: #fff;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .09em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a,
.footer-col ul li span {
  font-size: .88rem;
  color: rgba(255,255,255,.55);
  transition: color var(--t);
}
.footer-col ul li a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: .8rem;
  color: rgba(255,255,255,.35);
}
.footer-bottom a { color: rgba(255,255,255,.4); transition: color var(--t); }
.footer-bottom a:hover { color: #fff; }

/* ===== RESPONSIVE ===== */
@media (max-width: 860px) {
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .values-grid  { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .main-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 16px 20px;
    gap: 2px;
    box-shadow: var(--shadow);
    z-index: 99;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 16px; border-radius: 8px; font-size: .95rem; }
  .main-nav .nav-cta { margin-left: 0; text-align: center; margin-top: 6px; }
  .hero { padding: 48px 0 40px; }
  .cta-row { flex-direction: column; }
  .cta-row .btn { width: 100%; justify-content: center; }
  .services-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-banner { flex-direction: column; padding: 32px 24px; text-align: center; }
  .scope-list { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .section { padding: 44px 0; }
  .container { padding: 0 16px; }
  .hero h1 { font-size: 1.65rem; }
  .page-hero h1 { font-size: 1.45rem; }
  .brand img { height: 38px; }
  .service-card { padding: 22px 18px; }
  .stat-val { font-size: 2rem; }
  .cta-banner h2 { font-size: 1.25rem; }
  .contact-form button { width: 100%; justify-content: center; }
  .values-grid { grid-template-columns: 1fr; }
}