/* ==========================================================================
   Vigorel Institute of Athletic Biomechanics & Kinetic Ergonomics
   File: assets/css/vg-biomech.css
   ========================================================================== */

:root {
  --vg-primary: #0b2545;
  --vg-primary-dark: #06172d;
  --vg-primary-light: #133a69;
  --vg-secondary: #134074;
  --vg-accent: #0077b6;
  --vg-accent-kinetic: #028090;
  --vg-accent-energy: #f77f00;
  --vg-surface: #ffffff;
  --vg-surface-muted: #f8fafc;
  --vg-surface-elevated: #eef4f8;
  --vg-text: #1e293b;
  --vg-text-subtle: #475569;
  --vg-text-muted: #64748b;
  --vg-border: #e2e8f0;
  --vg-border-strong: #cbd5e1;
  --vg-shadow-sm: 0 2px 6px rgba(11, 37, 69, 0.05);
  --vg-shadow-md: 0 10px 25px -5px rgba(11, 37, 69, 0.08), 0 8px 10px -6px rgba(11, 37, 69, 0.04);
  --vg-shadow-lg: 0 20px 35px -5px rgba(11, 37, 69, 0.12), 0 10px 15px -5px rgba(11, 37, 69, 0.06);
  --vg-radius-sm: 6px;
  --vg-radius-md: 10px;
  --vg-radius-lg: 16px;
  --vg-radius-full: 9999px;
  --vg-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --vg-font-display: 'Plus Jakarta Sans', var(--vg-font-sans);
  --vg-container: 1200px;
}

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

html {
  font-family: var(--vg-font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--vg-text);
  background-color: var(--vg-surface-muted);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  color: var(--vg-text);
  background-color: var(--vg-surface-muted);
}

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

a {
  color: var(--vg-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--vg-primary);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--vg-font-display);
  font-weight: 700;
  color: var(--vg-primary);
  line-height: 1.25;
}

h1 { font-size: 2.75rem; letter-spacing: -0.025em; }
h2 { font-size: 2.15rem; letter-spacing: -0.02em; }
h3 { font-size: 1.5rem; letter-spacing: -0.015em; }
h4 { font-size: 1.2rem; }

p {
  margin-bottom: 1rem;
  color: var(--vg-text-subtle);
}

p:last-child {
  margin-bottom: 0;
}

/* Container */
.vg-container {
  width: 100%;
  max-width: var(--vg-container);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* Top Institute Strip */
.vg-top-strip {
  background: var(--vg-primary-dark);
  color: #94a3b8;
  font-size: 0.8125rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.vg-top-strip-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.vg-strip-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: #38bdf8;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.vg-strip-meta {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.vg-strip-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* Header */
.vg-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--vg-border);
  box-shadow: var(--vg-shadow-sm);
  transition: all 0.3s ease;
}

.vg-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.vg-brand {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  text-decoration: none;
}

.vg-brand-logo-img {
  width: 44px;
  height: 44px;
  border-radius: var(--vg-radius-sm);
  object-fit: cover;
  box-shadow: 0 2px 8px rgba(11, 37, 69, 0.15);
}

.vg-brand-text {
  display: flex;
  flex-direction: column;
}

.vg-brand-title {
  font-family: var(--vg-font-display);
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--vg-primary);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.vg-brand-subtitle {
  font-size: 0.725rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--vg-accent-kinetic);
}

/* Navigation */
.vg-nav-menu {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.vg-nav-link {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--vg-text-subtle);
  padding: 0.5rem 0.25rem;
  position: relative;
  transition: color 0.2s ease;
}

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

.vg-nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--vg-accent);
  border-radius: 2px;
}

.vg-btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--vg-primary);
  color: #ffffff;
  padding: 0.65rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--vg-radius-full);
  border: 1px solid transparent;
  transition: all 0.25s ease;
  box-shadow: 0 4px 12px rgba(11, 37, 69, 0.15);
}

.vg-btn-cta:hover {
  background: var(--vg-accent);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(0, 119, 182, 0.25);
}

.vg-btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: transparent;
  color: var(--vg-primary);
  padding: 0.65rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--vg-radius-full);
  border: 1.5px solid var(--vg-border-strong);
  transition: all 0.25s ease;
}

.vg-btn-secondary:hover {
  background: var(--vg-surface-elevated);
  border-color: var(--vg-primary);
  color: var(--vg-primary);
}

/* Mobile Toggle */
.vg-mobile-toggle {
  display: none;
  background: none;
  border: 1px solid var(--vg-border);
  border-radius: var(--vg-radius-sm);
  padding: 0.5rem 0.65rem;
  color: var(--vg-primary);
  cursor: pointer;
}

.vg-mobile-nav {
  display: none;
  background: #ffffff;
  border-top: 1px solid var(--vg-border);
  padding: 1rem 1.5rem 1.5rem;
}

.vg-mobile-nav.is-active {
  display: block;
}

.vg-mobile-nav .vg-nav-link {
  display: block;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--vg-border);
}

.vg-mobile-nav .vg-btn-cta {
  margin-top: 1rem;
  width: 100%;
  justify-content: center;
}

/* Hero Section */
.vg-hero {
  background: linear-gradient(135deg, #0b2545 0%, #134074 100%);
  color: #ffffff;
  padding: 5rem 0 4.5rem;
  position: relative;
  overflow: hidden;
}

.vg-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

.vg-hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3.5rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.vg-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(0, 180, 216, 0.15);
  border: 1px solid rgba(0, 180, 216, 0.35);
  color: #38bdf8;
  padding: 0.4rem 0.9rem;
  border-radius: var(--vg-radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
}

.vg-hero h1 {
  color: #ffffff;
  margin-bottom: 1.25rem;
  font-size: 3rem;
  line-height: 1.15;
}

.vg-hero-lead {
  font-size: 1.15rem;
  color: #cbd5e1;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.vg-hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.vg-hero-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--vg-radius-lg);
  padding: 1.75rem;
  box-shadow: var(--vg-shadow-lg);
  backdrop-filter: blur(8px);
}

.vg-hero-card img {
  border-radius: var(--vg-radius-md);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
  margin-bottom: 1.25rem;
}

.vg-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.vg-stat-box {
  background: rgba(255, 255, 255, 0.08);
  padding: 0.85rem;
  border-radius: var(--vg-radius-md);
  border: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.vg-stat-num {
  display: block;
  font-family: var(--vg-font-display);
  font-size: 1.6rem;
  font-weight: 800;
  color: #38bdf8;
}

.vg-stat-lbl {
  font-size: 0.75rem;
  color: #94a3b8;
  font-weight: 500;
}

/* Sections */
.vg-section {
  padding: 5rem 0;
}

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

.vg-section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3.5rem;
}

.vg-section-tag {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--vg-accent-kinetic);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.vg-section-title {
  margin-bottom: 1rem;
}

.vg-section-desc {
  font-size: 1.05rem;
  color: var(--vg-text-muted);
}

/* Feature Cards Grid */
.vg-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.vg-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem;
}

.vg-card {
  background: var(--vg-surface);
  border: 1px solid var(--vg-border);
  border-radius: var(--vg-radius-lg);
  overflow: hidden;
  box-shadow: var(--vg-shadow-sm);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.vg-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--vg-shadow-md);
  border-color: var(--vg-border-strong);
}

.vg-card-img-wrap {
  position: relative;
  overflow: hidden;
  height: 220px;
}

.vg-card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.vg-card:hover .vg-card-img-wrap img {
  transform: scale(1.04);
}

.vg-card-body {
  padding: 1.75rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.vg-card-badge {
  align-self: flex-start;
  background: var(--vg-surface-elevated);
  color: var(--vg-accent);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: var(--vg-radius-sm);
  margin-bottom: 0.85rem;
}

.vg-card-title {
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
}

.vg-card-text {
  font-size: 0.925rem;
  color: var(--vg-text-muted);
  margin-bottom: 1.25rem;
  flex: 1;
}

.vg-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--vg-border);
  padding-top: 1rem;
  font-size: 0.8125rem;
  color: var(--vg-text-muted);
}

/* Interactive Calculator Module */
.vg-calc-box {
  background: var(--vg-surface);
  border: 1px solid var(--vg-border);
  border-radius: var(--vg-radius-lg);
  padding: 2.5rem;
  box-shadow: var(--vg-shadow-md);
}

.vg-calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

.vg-form-group {
  margin-bottom: 1.25rem;
}

.vg-form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--vg-text);
  margin-bottom: 0.4rem;
}

.vg-form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--vg-text);
  background-color: var(--vg-surface);
  border: 1.5px solid var(--vg-border);
  border-radius: var(--vg-radius-md);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.vg-form-control:focus {
  outline: none;
  border-color: var(--vg-accent);
  box-shadow: 0 0 0 3px rgba(0, 119, 182, 0.15);
}

.vg-calc-output {
  background: var(--vg-primary);
  color: #ffffff;
  padding: 2rem;
  border-radius: var(--vg-radius-md);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.vg-calc-metric {
  text-align: center;
  margin-bottom: 1.5rem;
}

.vg-calc-metric-val {
  font-family: var(--vg-font-display);
  font-size: 2.75rem;
  font-weight: 800;
  color: #38bdf8;
  line-height: 1;
  margin-bottom: 0.35rem;
}

.vg-calc-metric-lbl {
  font-size: 0.875rem;
  color: #cbd5e1;
  font-weight: 500;
}

.vg-calc-breakdown {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 1.25rem;
  font-size: 0.875rem;
  color: #e2e8f0;
}

.vg-calc-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

/* FAQ Accordion */
.vg-faq-list {
  max-width: 840px;
  margin: 0 auto;
}

.vg-faq-item {
  background: var(--vg-surface);
  border: 1px solid var(--vg-border);
  border-radius: var(--vg-radius-md);
  margin-bottom: 1rem;
  overflow: hidden;
}

.vg-faq-btn {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  font-family: inherit;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--vg-primary);
  text-align: left;
  cursor: pointer;
  transition: background 0.2s ease;
}

.vg-faq-btn:hover {
  background: var(--vg-surface-muted);
}

.vg-faq-body {
  padding: 0 1.5rem 1.25rem;
  display: none;
  color: var(--vg-text-subtle);
  font-size: 0.95rem;
}

.vg-faq-item.is-open .vg-faq-body {
  display: block;
}

.vg-faq-item.is-open .vg-faq-icon {
  transform: rotate(180deg);
}

.vg-faq-icon {
  transition: transform 0.25s ease;
  color: var(--vg-accent);
}

/* Contact Details & Map */
.vg-contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.vg-contact-info-card {
  background: var(--vg-surface);
  border: 1px solid var(--vg-border);
  border-radius: var(--vg-radius-lg);
  padding: 2.25rem;
  box-shadow: var(--vg-shadow-sm);
}

.vg-contact-item {
  display: flex;
  gap: 1.25rem;
  margin-bottom: 1.75rem;
}

.vg-contact-icon-box {
  width: 48px;
  height: 48px;
  background: var(--vg-surface-elevated);
  color: var(--vg-accent);
  border-radius: var(--vg-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.vg-contact-item-title {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--vg-text-muted);
  margin-bottom: 0.25rem;
}

.vg-contact-item-val {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--vg-primary);
}

.vg-map-frame {
  width: 100%;
  height: 280px;
  border: 0;
  border-radius: var(--vg-radius-md);
  margin-top: 1.5rem;
}

/* Legal & Policy Pages Styling */
.vg-policy-content {
  background: var(--vg-surface);
  border: 1px solid var(--vg-border);
  border-radius: var(--vg-radius-lg);
  padding: 3rem;
  box-shadow: var(--vg-shadow-sm);
  max-width: 960px;
  margin: 0 auto;
}

.vg-policy-content h2 {
  font-size: 1.6rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--vg-border);
  padding-bottom: 0.5rem;
}

.vg-policy-content h3 {
  font-size: 1.25rem;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

.vg-policy-content ul, 
.vg-policy-content ol {
  margin-left: 1.5rem;
  margin-bottom: 1.25rem;
  color: var(--vg-text-subtle);
}

.vg-policy-content li {
  margin-bottom: 0.5rem;
}

.vg-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}

.vg-table th, 
.vg-table td {
  padding: 0.75rem 1rem;
  border: 1px solid var(--vg-border);
  text-align: left;
}

.vg-table th {
  background: var(--vg-surface-elevated);
  font-weight: 700;
  color: var(--vg-primary);
}

/* Footer */
.vg-footer {
  background: var(--vg-primary-dark);
  color: #94a3b8;
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.vg-footer-main {
  padding: 4.5rem 0 3rem;
}

.vg-footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 3rem;
}

.vg-footer-brand-title {
  color: #ffffff;
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
}

.vg-footer-desc {
  font-size: 0.875rem;
  line-height: 1.65;
  margin-bottom: 1.25rem;
  color: #94a3b8;
}

.vg-footer-col-title {
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.vg-footer-links {
  list-style: none;
}

.vg-footer-links li {
  margin-bottom: 0.65rem;
}

.vg-footer-links a {
  color: #94a3b8;
  font-size: 0.875rem;
  transition: color 0.2s ease, transform 0.2s ease;
  display: inline-block;
}

.vg-footer-links a:hover {
  color: #38bdf8;
  transform: translateX(3px);
}

.vg-footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 1.5rem 0;
  font-size: 0.8125rem;
}

.vg-footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Cookie Banner */
.vg-cookie-banner {
  position: fixed;
  bottom: 1.5rem;
  left: 1.5rem;
  right: 1.5rem;
  max-width: 520px;
  background: var(--vg-primary-dark);
  color: #ffffff;
  padding: 1.5rem;
  border-radius: var(--vg-radius-lg);
  box-shadow: var(--vg-shadow-lg);
  border: 1px solid rgba(255, 255, 255, 0.15);
  z-index: 9999;
  display: none;
}

.vg-cookie-banner.is-visible {
  display: block;
}

.vg-cookie-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
}

.vg-btn-cookie {
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: var(--vg-radius-sm);
  cursor: pointer;
  border: none;
}

.vg-btn-cookie-accept {
  background: #0077b6;
  color: #ffffff;
}

.vg-btn-cookie-reject {
  background: rgba(255, 255, 255, 0.15);
  color: #e2e8f0;
}

/* Responsive */
@media (max-width: 992px) {
  .vg-hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .vg-grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .vg-footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .vg-calc-grid,
  .vg-contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .vg-nav-menu,
  .vg-btn-cta-header {
    display: none;
  }
  .vg-mobile-toggle {
    display: block;
  }
  .vg-grid-3,
  .vg-grid-2 {
    grid-template-columns: 1fr;
  }
  .vg-footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  h1 { font-size: 2.2rem; }
  h2 { font-size: 1.75rem; }
  .vg-hero { padding: 3.5rem 0; }
  .vg-policy-content { padding: 1.75rem; }
}