/* =========================================================
   GUS ZAGREB - BRAND STYLESHEET
   Palette: Trustworthy Navy Dominant + Warm Amber Accent
   Typography: IBM Plex Sans (Headings) + Inter (Body)
   Zero-Raster / Pure CSS & SVG Design
   ========================================================= */

:root {
  /* Palette */
  --navy-950: #08111d;
  --navy-900: #0d1b2a;
  --navy-800: #1b263b;
  --navy-700: #263852;
  --navy-600: #334866;
  
  --amber-500: #d97706;
  --amber-400: #f59e0b;
  --amber-600: #b45309;
  --amber-100: #fef3c7;
  --amber-50:  #fffbeb;

  --gray-50:  #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-500: #64748b;
  --gray-700: #334155;
  --gray-900: #0f172a;

  --white: #ffffff;
  --text-main: #1e293b;
  --text-muted: #55657e;

  /* Fonts */
  --font-heading: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Layout */
  --max-width: 1180px;
  --header-height: 74px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --transition: all 0.22s ease-in-out;
}

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

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

body {
  font-family: var(--font-body);
  color: var(--text-main);
  background-color: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

ul {
  list-style: none;
}

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

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

.section-padding {
  padding: 88px 0;
}

.bg-light {
  background-color: var(--gray-50);
  border-top: 1px solid var(--gray-200);
  border-bottom: 1px solid var(--gray-200);
}

.text-center {
  text-align: center;
}

.text-white {
  color: var(--white) !important;
}

.text-amber {
  color: var(--amber-400) !important;
}

.text-light-muted {
  color: #a5b4cb !important;
}

/* TYPOGRAPHY */
h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--navy-900);
}

.section-head {
  max-width: 680px;
  margin: 0 auto 56px auto;
}

.section-subtitle {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--amber-600);
  margin-bottom: 8px;
}

.section-title {
  font-size: 2.25rem;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.section-intro {
  font-size: 1.0625rem;
  color: var(--text-muted);
}

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  line-height: 1.2;
  text-align: center;
}

.btn-sm {
  padding: 9px 18px;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

.btn-primary {
  background-color: var(--amber-500);
  color: var(--navy-950);
  border-color: var(--amber-500);
}

.btn-primary:hover {
  background-color: var(--amber-400);
  border-color: var(--amber-400);
  transform: translateY(-1px);
}

.btn-ghost {
  background-color: transparent;
  color: var(--white);
  border-color: var(--navy-600);
}

.btn-ghost:hover {
  background-color: rgba(255, 255, 255, 0.08);
  border-color: var(--white);
}

/* 1. STICKY HEADER */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--navy-900);
  border-bottom: 2px solid var(--amber-500);
  height: var(--header-height);
}

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

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

.brand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background-color: var(--amber-500);
  color: var(--navy-950);
  border-radius: var(--radius-sm);
}

.brand-icon svg {
  width: 22px;
  height: 22px;
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  letter-spacing: 0.06em;
  color: var(--white);
}

.brand-name strong {
  color: var(--amber-400);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  color: var(--gray-300);
  font-size: 0.9375rem;
  font-weight: 500;
}

.nav-link:hover {
  color: var(--amber-400);
}

.header-cta-group {
  display: flex;
  align-items: center;
  gap: 18px;
}

.header-phone-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--white);
  font-size: 0.875rem;
  font-weight: 600;
}

.header-phone-link svg {
  width: 17px;
  height: 17px;
  color: var(--amber-400);
}

.header-phone-link:hover {
  color: var(--amber-400);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--white);
  transition: var(--transition);
}

/* 2. SPLIT HERO & STATS BAR */
.hero-section {
  background-color: var(--navy-900);
  color: var(--white);
  padding: 64px 0 0 0;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
  padding-bottom: 56px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: rgba(217, 119, 6, 0.12);
  border: 1px solid rgba(217, 119, 6, 0.35);
  color: var(--amber-400);
  padding: 6px 14px;
  border-radius: 99px;
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.badge-dot {
  width: 7px;
  height: 7px;
  background-color: var(--amber-400);
  border-radius: 50%;
}

.hero-title {
  font-size: 2.85rem;
  color: var(--white);
  line-height: 1.18;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero-lead {
  font-size: 1.125rem;
  line-height: 1.65;
  color: var(--gray-300);
  margin-bottom: 32px;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Geometric Blueprint Card (Pure CSS/SVG) */
.hero-visual-card {
  display: flex;
  justify-content: center;
}

.heritage-blueprint-card {
  width: 100%;
  background-color: var(--navy-800);
  border: 2px solid var(--navy-700);
  border-top: 4px solid var(--amber-500);
  border-radius: var(--radius-md);
  padding: 28px;
}

.blueprint-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  font-family: var(--font-heading);
  letter-spacing: 0.08em;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--navy-600);
}

.bp-tag {
  color: var(--amber-400);
  font-weight: 700;
}

.bp-status {
  color: var(--gray-300);
}

.bp-graphic-block {
  margin: 24px 0;
  background: var(--navy-950);
  border: 1px solid var(--navy-700);
  border-radius: var(--radius-sm);
  padding: 24px 16px;
  text-align: center;
}

.radiator-schematic {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 14px;
}

.schematic-fin {
  width: 14px;
  height: 72px;
  background: var(--navy-700);
  border-radius: 4px;
  border: 1px solid var(--navy-600);
  transition: var(--transition);
}

.active-fin {
  background: var(--amber-500);
  border-color: var(--amber-400);
  box-shadow: 0 0 12px rgba(245, 158, 11, 0.25);
}

.schematic-caption {
  font-size: 0.8125rem;
  color: var(--gray-300);
  font-weight: 500;
}

.bp-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.bp-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--gray-200);
}

.bp-features li svg {
  width: 18px;
  height: 18px;
  color: var(--amber-400);
  flex-shrink: 0;
}

/* HERO STATS BAR (SIGNATURE MOTIF) */
.hero-stats-bar {
  background-color: var(--navy-950);
  border: 1px solid var(--navy-700);
  border-bottom: none;
  border-top-left-radius: var(--radius-md);
  border-top-right-radius: var(--radius-md);
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  align-items: center;
  padding: 28px 24px;
}

.stat-box {
  text-align: center;
  padding: 0 12px;
}

.stat-number {
  display: block;
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--amber-400);
  line-height: 1.1;
}

.stat-label {
  display: block;
  font-size: 0.8125rem;
  color: var(--gray-300);
  margin-top: 4px;
}

.stat-divider {
  width: 1px;
  height: 44px;
  background-color: var(--navy-700);
}

/* 3. SERVICES GRID */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background-color: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: var(--transition);
}

.service-card:hover {
  border-color: var(--amber-500);
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(13, 27, 42, 0.06);
}

.service-icon-wrap {
  width: 48px;
  height: 48px;
  background-color: var(--navy-900);
  color: var(--amber-400);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
}

.service-icon-wrap svg {
  width: 24px;
  height: 24px;
}

.service-title {
  font-size: 1.1875rem;
  margin-bottom: 12px;
  color: var(--navy-900);
}

.service-desc {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 4. REALISATIONS (6-tile bordered cards, no photos) */
.realisations-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.result-card {
  background-color: var(--white);
  border: 2px solid var(--navy-800);
  border-top: 5px solid var(--amber-500);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  position: relative;
}

.result-card:hover {
  border-color: var(--amber-500);
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(13, 27, 42, 0.08);
}

.result-badge {
  display: inline-block;
  font-size: 0.6875rem;
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--amber-600);
  background-color: var(--amber-50);
  border: 1px solid var(--amber-100);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
}

.result-title {
  font-size: 1.125rem;
  line-height: 1.35;
  margin-bottom: 12px;
  color: var(--navy-900);
}

.result-outcome {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 20px;
}

.result-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 14px;
  border-top: 1px dashed var(--gray-200);
}

.meta-tag {
  font-size: 0.75rem;
  background-color: var(--gray-100);
  color: var(--navy-700);
  font-weight: 600;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
}

/* 5. REVIEWS */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background-color: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-stars {
  color: var(--amber-500);
  font-size: 1.125rem;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.review-quote {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--gray-700);
  font-style: italic;
  margin-bottom: 24px;
}

.review-author-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--gray-100);
}

.author-avatar-block {
  width: 40px;
  height: 40px;
  background-color: var(--navy-800);
  color: var(--amber-400);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.review-author {
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--navy-900);
}

.review-location {
  font-size: 0.75rem;
  color: var(--gray-500);
}

/* 6. CONTACT SECTION */
.contact-section {
  background-color: var(--navy-900);
  color: var(--white);
}

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

.contact-info .section-title {
  margin-top: 6px;
  margin-bottom: 18px;
}

.contact-text {
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 32px;
}

.contact-detail-items {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 36px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.contact-icon-bubble {
  width: 40px;
  height: 40px;
  background-color: var(--navy-800);
  border: 1px solid var(--navy-700);
  color: var(--amber-400);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.contact-icon-bubble svg {
  width: 20px;
  height: 20px;
}

.contact-item-title {
  font-size: 0.8125rem;
  color: var(--gray-300);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-item-value {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--white);
}

.phone-link {
  color: var(--amber-400);
}

.phone-link:hover {
  text-decoration: underline;
}

.contact-socials {
  padding-top: 24px;
  border-top: 1px solid var(--navy-800);
}

.socials-heading {
  display: block;
  font-size: 0.8125rem;
  color: var(--gray-300);
  margin-bottom: 12px;
}

.social-icons-row {
  display: flex;
  gap: 10px;
}

.social-btn {
  width: 36px;
  height: 36px;
  background-color: var(--navy-800);
  border: 1px solid var(--navy-700);
  color: var(--gray-200);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.social-btn svg {
  width: 18px;
  height: 18px;
}

.social-btn:hover {
  background-color: var(--amber-500);
  border-color: var(--amber-500);
  color: var(--navy-950);
}

/* Form Card */
.contact-form-card {
  background-color: var(--white);
  color: var(--navy-900);
  border-radius: var(--radius-md);
  padding: 36px 32px;
  border-top: 4px solid var(--amber-500);
}

.form-card-title {
  font-size: 1.375rem;
  margin-bottom: 6px;
}

.form-card-sub {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.inquiry-form .form-group {
  margin-bottom: 16px;
}

.inquiry-form label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--navy-900);
  margin-bottom: 6px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  font-size: 0.875rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  background-color: var(--white);
  color: var(--navy-900);
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--amber-500);
  box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.15);
}

textarea.form-control {
  resize: vertical;
}

.form-checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--gray-700);
  margin-top: 12px;
  margin-bottom: 6px;
}

.form-checkbox-group input[type="checkbox"] {
  margin-top: 3px;
  accent-color: var(--amber-500);
}

.form-privacy-link {
  color: var(--amber-600);
  text-decoration: underline;
}

.error-msg {
  display: none;
  font-size: 0.75rem;
  color: #dc2626;
  margin-top: 4px;
}

.form-group.has-error .form-control {
  border-color: #dc2626;
}

.form-group.has-error .error-msg {
  display: block;
}

.form-feedback.success {
  background-color: #ecfdf5;
  border: 1px solid #10b981;
  color: #065f46;
  font-size: 0.875rem;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  margin-top: 16px;
  text-align: center;
  font-weight: 500;
}

/* FOOTER */
.site-footer {
  background-color: var(--navy-950);
  color: var(--gray-300);
  border-top: 1px solid var(--navy-800);
  padding-top: 56px;
}

.footer-container {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

.brand-logo-footer {
  margin-bottom: 16px;
}

.footer-text {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--gray-400);
  max-width: 460px;
  margin-bottom: 16px;
}

.footer-address-line {
  font-size: 0.8125rem;
  color: var(--amber-400);
  font-weight: 500;
}

.footer-links-side {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.footer-col-title {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--white);
  margin-bottom: 14px;
}

.footer-nav-col ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-nav-col a {
  font-size: 0.8125rem;
  color: var(--gray-400);
}

.footer-nav-col a:hover {
  color: var(--amber-400);
}

.footer-bottom-bar {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 18px 0;
  font-size: 0.75rem;
  color: var(--gray-500);
}

.footer-bottom-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* PRIVACY MODAL */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(8, 17, 29, 0.75);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-backdrop.is-open {
  display: flex;
}

.modal-dialog {
  background-color: var(--white);
  width: 100%;
  max-width: 600px;
  border-radius: var(--radius-md);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-header {
  padding: 20px 24px;
  background-color: var(--navy-900);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.125rem;
  color: var(--white);
}

.modal-close-btn {
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.75rem;
  line-height: 1;
  cursor: pointer;
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
  font-size: 0.875rem;
  color: var(--gray-700);
  line-height: 1.6;
}

.modal-body h4 {
  color: var(--navy-900);
  font-size: 0.9375rem;
  margin-top: 14px;
  margin-bottom: 6px;
}

.modal-body ul {
  list-style: disc;
  margin-left: 20px;
  margin-bottom: 12px;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--gray-200);
  display: flex;
  justify-content: flex-end;
  background-color: var(--gray-50);
}

/* RESPONSIVE BREAKPOINTS */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .hero-title {
    font-size: 2.35rem;
  }

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

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-stats-bar {
    grid-template-columns: 1fr 1fr;
    gap: 20px 0;
  }

  .stat-divider {
    display: none;
  }
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: flex;
  }

  .nav-menu {
    position: absolute;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background-color: var(--navy-900);
    border-bottom: 1px solid var(--navy-700);
    padding: 20px;
    display: none;
  }

  .nav-menu.is-active {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .header-phone-link span {
    display: none;
  }

  .hero-title {
    font-size: 1.85rem;
  }

  .services-grid,
  .realisations-grid,
  .reviews-grid {
    grid-template-columns: 1fr;
  }

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

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

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

  .footer-bottom-flex {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}