/* ==========================================================================
   VANTAGE EXPERTS - MAIN APPLICATION STYLES & RESPONSIVE QUERIES
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. RESET & BASE STYLES
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 1rem);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-elevated);
  border-radius: var(--radius-pill);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gold-600);
}

/* --------------------------------------------------------------------------
   2. LAYOUT UTILITIES
   -------------------------------------------------------------------------- */
.container {
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-lg);
  padding-right: var(--space-lg);
  width: 100%;
}

.container-narrow {
  max-width: var(--container-narrow);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-lg);
  padding-right: var(--space-lg);
  width: 100%;
}

.section-padding {
  padding-top: var(--space-4xl);
  padding-bottom: var(--space-4xl);
  position: relative;
}

.bg-secondary-theme {
  background-color: var(--bg-secondary);
}

section[id] {
  scroll-margin-top: calc(var(--header-height) + 1rem);
}

/* --------------------------------------------------------------------------
   3. RESPONSIVE MEDIA QUERIES (COMPREHENSIVE MULTI-BREAKPOINT ENGINE)
   -------------------------------------------------------------------------- */

/* Large Desktops & Laptops (<= 1200px) */
@media (max-width: 1200px) {
  .container, .container-narrow {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }

  .roadmap-timeline {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
  }

  .bento-span-8 {
    grid-column: span 12;
  }

  .bento-span-4 {
    grid-column: span 6;
  }

  .bento-span-6 {
    grid-column: span 6;
  }
}

/* Compact desktop navigation */
@media (max-width: 1500px) {
  .desktop-nav {
    display: none;
  }

  .mobile-nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

@media (min-width: 1501px) {
  .header-container {
    max-width: 1500px;
  }
}

/* Medium Tablets & Landscape (<= 992px) */
@media (max-width: 992px) {
  .desktop-nav {
    display: none;
  }

  .mobile-nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .hero-content {
    text-align: left;
  }

  .hero-hud-card {
    max-width: 640px;
    margin: 0 auto;
    width: 100%;
  }

  .bento-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
  }

  .bento-span-4, .bento-span-6, .bento-span-8, .bento-span-12 {
    grid-column: span 1;
  }

  .bento-grid > .bento-card:first-child {
    grid-column: 1 / -1;
  }

  .differentiators-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
  }

  .audience-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .roadmap-timeline {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
  }

  .developer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
  }

  .footer-top {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2xl);
  }

  .mobile-app-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .mobile-app-content {
    max-width: 720px;
    margin: 0 auto;
  }

  .mobile-app-preview {
    min-height: 430px;
  }

  .hero-section {
    background-attachment: scroll;
  }
}

/* Tablets & Small Screens (<= 768px) */
@media (max-width: 768px) {
  .header-container {
    padding-left: 1rem;
    padding-right: 1rem;
    gap: 0.5rem;
  }

  .brand-logo-frame {
    width: min(285px, calc(100vw - 6rem));
    height: 87px;
  }

  .header-actions {
    gap: 0.45rem;
  }

  .hero-section {
    min-height: auto;
    padding-top: calc(var(--header-height) + 3.5rem);
    padding-bottom: var(--space-3xl);
    background-position: 62% center;
  }

  .hero-grid {
    gap: var(--space-xl);
  }

  .hero-subtitle {
    max-width: 100%;
  }

  .hero-hud-card {
    padding: var(--space-lg);
  }

  .section-header {
    max-width: 100%;
  }

  .section-title {
    font-size: clamp(2rem, 7vw, 3rem);
  }

  .visual-floating-badge {
    left: 1rem;
    right: 1rem;
    bottom: 1rem;
  }

  .section-padding {
    padding-top: var(--space-3xl);
    padding-bottom: var(--space-3xl);
  }

  .metrics-strip {
    grid-template-columns: repeat(2, 1fr);
    row-gap: var(--space-md);
    column-gap: var(--space-sm);
    padding: var(--space-md);
  }

  .metric-item {
    padding: var(--space-xs) var(--space-sm);
  }

  .metric-item:nth-child(2) {
    border-right: none;
  }

  .bento-grid {
    grid-template-columns: 1fr;
  }

  .bento-span-4, .bento-span-6, .bento-span-8, .bento-span-12 {
    grid-column: 1 / -1;
  }

  .differentiators-grid {
    grid-template-columns: 1fr;
  }

  .roadmap-timeline {
    grid-template-columns: 1fr;
  }

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

  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .category-filter-bar {
    gap: 0.35rem;
  }

  .filter-btn {
    padding: 0.4rem 0.85rem;
    font-size: 0.8rem;
  }

  .portfolio-grid {
    grid-template-columns: repeat(auto-fill, minmax(135px, 1fr));
    gap: var(--space-sm);
  }

  .portfolio-card {
    height: 80px;
    padding: var(--space-sm);
  }

  .portfolio-brand-logo {
    max-height: 30px;
    max-width: 100px;
  }
}

/* Mobile Screens (<= 640px) */
@media (max-width: 640px) {
  .header-actions .btn-shimmer {
    display: none;
  }

  .mobile-app-section {
    padding: var(--space-3xl) 0;
  }

  .app-store-note {
    display: none;
  }

  .app-store-button + .app-store-button {
    margin-left: 0;
    margin-top: 0.55rem;
  }

  .mobile-app-preview {
    min-height: 390px;
  }

  .mobile-app-preview::before {
    width: 290px;
    height: 290px;
  }

  .mobile-app-device {
    width: 240px;
    height: 430px;
  }

  .mobile-app-screen {
    padding: 2.2rem 0.8rem 0.8rem;
  }

  .app-screen-greeting {
    margin-top: 1.6rem;
    font-size: 1.05rem;
  }

  .app-screen-metrics {
    margin-top: 1.1rem;
  }

  .theme-toggle-btn {
    width: 34px;
    height: 34px;
  }

  .mobile-nav-toggle {
    width: 36px;
    height: 36px;
    padding: 0;
  }

  .eyebrow-badge {
    align-items: flex-start;
    text-align: left;
    line-height: 1.35;
  }

  .hero-title br {
    display: none;
  }

  .container-narrow > .btn {
    max-width: 100%;
    white-space: normal;
    line-height: 1.35;
  }

  .visual-floating-badge {
    position: static;
    margin-top: 0.75rem;
    border-radius: var(--radius-md);
    flex-direction: column;
    align-items: stretch;
    text-align: center;
    gap: 0.75rem;
    padding: 1rem;
  }

  .visual-floating-badge .btn {
    width: 100%;
    justify-content: center;
  }

  .visual-showcase-img {
    min-height: 200px;
    max-height: 280px;
  }

  .developer-grid {
    grid-template-columns: 1fr;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
    align-items: center;
  }

  .footer-bottom > div:last-child {
    flex-wrap: wrap;
    justify-content: center;
  }

  .modal-dialog {
    padding: var(--space-lg) var(--space-md);
    width: calc(100% - 20px);
  }

  .chip-checkbox span {
    font-size: 0.78rem;
    padding: 0.35rem 0.75rem;
  }
}

/* Small Mobile Phones (<= 480px) */
@media (max-width: 480px) {
  :root {
    --space-4xl: 3.5rem;
    --space-3xl: 2.75rem;
    --header-height: 100px;
  }

  .container, .container-narrow {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .site-header {
    height: 100px;
  }

  .header-container {
    padding-top: 8px;
    padding-bottom: 8px;
  }

  .brand-logo-frame {
    width: min(276px, calc(100vw - 6rem));
    height: 84px;
    padding: 0.25rem 0.4rem;
  }

  .hero-title {
    font-size: 2.15rem;
    line-height: 1.15;
  }

  .hero-section {
    background-position: 68% center;
  }

  .hero-subtitle {
    font-size: 0.95rem;
    line-height: 1.55;
    margin-bottom: var(--space-xl);
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    gap: var(--space-sm);
  }

  .hero-cta-group .btn {
    width: 100%;
    justify-content: center;
  }

  .metrics-strip {
    grid-template-columns: 1fr;
    padding: var(--space-md);
  }

  .metric-item {
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
    padding-bottom: var(--space-sm);
    margin-bottom: var(--space-xs);
  }

  .metric-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 0;
  }

  .metric-value {
    font-size: 1.85rem;
  }

  .brand-ticker-card {
    height: 46px;
    width: 110px;
    min-width: 110px;
    padding: 0 0.75rem;
    margin: 0 0.35rem;
  }

  .brand-ticker-logo {
    max-height: 22px;
    max-width: 80px;
  }

  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
  }

  .portfolio-card {
    height: 72px;
    padding: 0.5rem;
  }

  .portfolio-brand-logo {
    max-height: 26px;
    max-width: 85px;
  }

  .categories-pill-grid {
    gap: 0.35rem;
  }

  .category-tag {
    font-size: 0.75rem;
    padding: 0.35rem 0.75rem;
  }

  .bento-card {
    padding: var(--space-lg);
  }

  .bento-card-title {
    font-size: 1.15rem;
  }

  .bento-card-desc {
    font-size: 0.875rem;
  }

  .hud-grid-metrics {
    grid-template-columns: 1fr;
    gap: var(--space-xs);
  }

  .hud-metric-number {
    font-size: 1.15rem;
  }
}

/* Ultra-compact / Fold Screens (<= 360px) */
@media (max-width: 360px) {
  .brand-name {
    font-size: 1rem;
  }

  .brand-tagline-sub {
    display: none;
  }

  .hero-title {
    font-size: 1.9rem;
  }

  .portfolio-grid {
    grid-template-columns: 1fr;
  }

  .filter-btn {
    width: 100%;
    text-align: center;
  }
}