/* ==========================================================================
   ZEROSUGAR — Design System & Master Stylesheet
   Quiet Luxury High-Tension Growth Studio
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@20..48,100..700,0..1,-50..200');

:root {
  /* Core Palette Tokens */
  --void: #070707;
  --carbon: #121212;
  --elevated: #1A1A1A;
  --hairline: #2B2B2B;
  --ivory: #F5F2EE;
  --ash: #9A9590;
  --ash-dim: #666360;
  --crimson: #C41E3A;
  --crimson-hover: #E11D48;
  --crimson-dim: #6F1424;
  --crimson-subtle: rgba(196, 30, 58, 0.12);
  --crimson-glow: rgba(196, 30, 58, 0.25);

  /* Spacing Tokens */
  --site-max-width: 1440px;
  --margin-desktop: 4rem;      /* 64px */
  --margin-mobile: 1.25rem;    /* 20px */
  --gutter: 1.5rem;            /* 24px */
  --section-gap: 8rem;         /* 128px */
  --section-gap-mobile: 4.5rem;/* 72px */

  /* Border Radii */
  --radius-btn: 2px;
  --radius-card: 4px;
  --radius-full: 9999px;

  /* Transitions */
  --ease-out-quint: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.15s ease;
  --transition-standard: 0.25s var(--ease-out-quint);
  --transition-slow: 0.5s var(--ease-out-quint);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--void);
  color: var(--ivory);
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
  overflow-x: clip;
  max-width: 100%;
}

body {
  font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--void);
  color: var(--ivory);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  overflow-x: clip;
  max-width: 100%;
  width: 100%;
  position: relative;
  overflow-wrap: break-word;
  word-wrap: break-word;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

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

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

button {
  cursor: pointer;
  background: none;
  border: none;
}

ul, ol {
  list-style: none;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}
::-webkit-scrollbar-track {
  background: var(--void);
}
::-webkit-scrollbar-thumb {
  background: var(--hairline);
  border-radius: 2px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--crimson);
}

/* Selection */
::selection {
  background: var(--crimson);
  color: var(--ivory);
}

/* ==========================================================================
   Typography System
   ========================================================================== */
.font-wordmark {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 15px;
  line-height: 15px;
  letter-spacing: 0.24em;
  font-weight: 500;
  text-transform: uppercase;
}

.font-headline-hero {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2.5rem, 6.5vw, 6rem); /* 40px - 96px */
  line-height: 1.04;
  letter-spacing: -0.03em;
  font-weight: 500;
  text-transform: uppercase;
}

.font-headline-lg {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2rem, 4.5vw, 4rem); /* 32px - 64px */
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-weight: 500;
  text-transform: uppercase;
}

.font-headline-md {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.4rem, 2.5vw, 2rem); /* 22px - 32px */
  line-height: 1.25;
  letter-spacing: -0.02em;
  font-weight: 500;
}

.font-body-lg {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 18px;
  line-height: 1.62;
  font-weight: 400;
}

.font-body-md {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 16px;
  line-height: 1.62;
  font-weight: 400;
}

.font-body-sm {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 14px;
  line-height: 1.57;
  font-weight: 400;
}

.font-label-md {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 13px;
  line-height: 18px;
  letter-spacing: 0.12em;
  font-weight: 500;
  text-transform: uppercase;
}

.font-label-sm {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 11px;
  line-height: 14px;
  letter-spacing: 0.20em;
  font-weight: 500;
  text-transform: uppercase;
}

.font-mono {
  font-family: 'JetBrains Mono', monospace;
}

/* ==========================================================================
   Color Utilities
   ========================================================================== */
.text-ivory { color: var(--ivory); }
.text-ash { color: var(--ash); }
.text-crimson { color: var(--crimson); }
.text-crimson-hover { color: var(--crimson-hover); }
.text-carbon { color: var(--carbon); }

.bg-void { background-color: var(--void); }
.bg-carbon { background-color: var(--carbon); }
.bg-elevated { background-color: var(--elevated); }
.bg-crimson { background-color: var(--crimson); }
.bg-crimson-dim { background-color: var(--crimson-dim); }

.border-hairline { border-color: var(--hairline); }
.border-crimson { border-color: var(--crimson); }

/* Hairline Borders */
.hairline-b { border-bottom: 1px solid var(--hairline); }
.hairline-t { border-top: 1px solid var(--hairline); }
.hairline-l { border-left: 1px solid var(--hairline); }
.hairline-r { border-right: 1px solid var(--hairline); }
.hairline-all { border: 1px solid var(--hairline); }

/* ==========================================================================
   Layout Containers & Grid
   ========================================================================== */
.site-container {
  width: 100%;
  max-width: var(--site-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--margin-desktop);
  padding-right: var(--margin-desktop);
}

@media (max-width: 768px) {
  .site-container {
    padding-left: var(--margin-mobile);
    padding-right: var(--margin-mobile);
  }
}

.section-padding {
  padding-top: var(--section-gap);
  padding-bottom: var(--section-gap);
}

@media (max-width: 768px) {
  .section-padding {
    padding-top: var(--section-gap-mobile);
    padding-bottom: var(--section-gap-mobile);
  }
}

/* Grid System */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter);
}

@media (max-width: 1024px) {
  .grid-12 {
    gap: 1.25rem;
  }
}

@media (max-width: 768px) {
  .grid-12 {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

/* Flex Helpers */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.flex-grow { flex-grow: 1; }
.flex-1 { flex: 1 1 0%; }
.flex-wrap { flex-wrap: wrap; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }
.gap-12 { gap: 3rem; }
.gap-16 { gap: 4rem; }

/* ==========================================================================
   Components: Buttons & CTAs
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-btn);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  transition: all var(--transition-standard);
  white-space: normal;
  text-align: center;
  line-height: 1.35;
  overflow-wrap: break-word;
  word-break: break-word;
  max-width: 100%;
  box-sizing: border-box;
  gap: 0.5rem;
}

.btn-crimson {
  background-color: var(--crimson);
  color: var(--ivory);
  border: 1px solid var(--crimson);
}
.btn-crimson:hover {
  background-color: var(--crimson-hover);
  border-color: var(--crimson-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--crimson-glow);
}

.btn-ghost {
  background-color: transparent;
  color: var(--ivory);
  border: 1px solid var(--hairline);
}
.btn-ghost:hover {
  background-color: var(--elevated);
  border-color: var(--ivory);
  color: var(--ivory);
}

.btn-outline-crimson {
  background-color: transparent;
  color: var(--crimson);
  border: 1px solid var(--crimson);
}
.btn-outline-crimson:hover {
  background-color: var(--crimson);
  color: var(--ivory);
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: 11px;
  letter-spacing: 0.16em;
}

.btn-lg {
  padding: 1rem 2.25rem;
  font-size: 14px;
  letter-spacing: 0.16em;
}

/* ==========================================================================
   Components: Cards & Surfaces
   ========================================================================== */
.card-carbon {
  background-color: var(--carbon);
  border: 1px solid var(--hairline);
  transition: background-color var(--transition-standard), border-color var(--transition-standard), transform var(--transition-standard);
}
.card-carbon:hover {
  background-color: var(--elevated);
  border-color: rgba(196, 30, 58, 0.4);
}

.card-elevated {
  background-color: var(--elevated);
  border: 1px solid var(--hairline);
}

/* Status Dot & Section Trackers */
.status-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--crimson);
}
.status-dot.pulse {
  animation: pulseGlow 2s infinite;
}

@keyframes pulseGlow {
  0% { opacity: 0.6; transform: scale(0.9); box-shadow: 0 0 0 0 rgba(196, 30, 58, 0.7); }
  70% { opacity: 1; transform: scale(1.1); box-shadow: 0 0 0 6px rgba(196, 30, 58, 0); }
  100% { opacity: 0.6; transform: scale(0.9); box-shadow: 0 0 0 0 rgba(196, 30, 58, 0); }
}

.section-tracker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}
.section-tracker-text {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.20em;
  text-transform: uppercase;
  color: var(--ash);
}

/* Editorial Images */
.editorial-img-wrapper {
  position: relative;
  overflow: hidden;
  background-color: var(--carbon);
  border: 1px solid var(--hairline);
}
.editorial-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%) contrast(115%);
  transition: filter 0.6s var(--ease-out-quint), transform 0.8s var(--ease-out-quint);
}
.editorial-img-wrapper:hover .editorial-img {
  filter: grayscale(0%) contrast(105%);
  transform: scale(1.03);
}

/* ==========================================================================
   Header & Fixed Navigation
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: rgba(7, 7, 7, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--hairline);
  transition: background-color var(--transition-fast);
}

.site-header-inner {
  max-width: var(--site-max-width);
  margin: 0 auto;
  padding: 0 var(--margin-desktop);
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

@media (max-width: 860px) {
  .site-header-inner {
    padding: 0 var(--margin-mobile);
    height: 70px;
  }
}

/* Wordmark / Logo */
.site-wordmark {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}
.site-logo-img {
  height: auto;
  max-height: 36px;
  width: auto;
  object-fit: contain;
  content: url("../images/logo-white.png"); /* Default to white logo for dark theme */
}

/* Light / Dark Logo Swapping for future light themes */
.bg-light .site-logo-img,
.bg-white .site-logo-img,
.theme-light .site-logo-img,
.light-mode .site-logo-img {
  content: url("../images/logo.png");
}

@media (min-width: 768px) {
  .site-logo-img {
    max-height: 48px;
  }
}

.site-wordmark.animated .site-logo-img {
  animation: fadeInLogo 1.6s var(--ease-out-quint) forwards;
}

@keyframes fadeInLogo {
  0% { opacity: 0; transform: translateY(5px); }
  100% { opacity: 1; transform: translateY(0); }
}

/* Desktop Nav Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.nav-link {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ash);
  padding: 0.25rem 0;
  position: relative;
  transition: color var(--transition-fast);
}
.nav-link:hover {
  color: var(--ivory);
}
.nav-link.active {
  color: var(--ivory);
}
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--crimson);
}

@media (max-width: 860px) {
  .nav-links {
    display: none;
  }
  .header-cta-desktop {
    display: none;
  }
}

/* Mobile Hamburger */
.mobile-hamburger {
  display: none;
  padding: 0.5rem;
  color: var(--ivory);
  background: transparent;
  border: none;
  cursor: pointer;
}
@media (max-width: 860px) {
  .mobile-hamburger {
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

/* Mobile Dropdown Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 70px;
  left: 0;
  right: 0;
  width: 100%;
  max-width: 100vw;
  box-sizing: border-box;
  max-height: calc(100vh - 70px);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  background-color: rgba(7, 7, 7, 0.98);
  border-bottom: 1px solid var(--hairline);
  padding: 2rem var(--margin-mobile) 2.5rem;
  flex-direction: column;
  gap: 1.5rem;
  z-index: 99;
}
.mobile-menu.open {
  display: flex;
}
.mobile-menu-link {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 24px;
  line-height: 1.3;
  font-weight: 500;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  color: var(--ash);
  transition: color var(--transition-fast);
}
.mobile-menu-link:hover,
.mobile-menu-link.active {
  color: var(--ivory);
}
.mobile-menu-link.active {
  border-left: 2px solid var(--crimson);
  padding-left: 0.75rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: var(--carbon);
  border-top: 1px solid var(--hairline);
  padding-top: 4.5rem;
  padding-bottom: 3.5rem;
  margin-top: auto;
  width: 100%;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  padding-bottom: 3.5rem;
  border-bottom: 1px solid var(--hairline);
}

@media (max-width: 1024px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 640px) {
  .footer-top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.footer-heading {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.20em;
  text-transform: uppercase;
  color: var(--ash);
  margin-bottom: 1.25rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link {
  font-size: 14px;
  color: var(--ash);
  transition: color var(--transition-fast);
}
.footer-link:hover {
  color: var(--ivory);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ash-dim);
  text-transform: uppercase;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ==========================================================================
   Interactive Engine & Tab Components
   ========================================================================== */
.engine-row {
  display: grid;
  grid-template-columns: 240px 1fr auto;
  align-items: center;
  padding: 2rem 1.5rem;
  border-bottom: 1px solid var(--hairline);
  transition: background-color var(--transition-standard);
  text-decoration: none;
}
.engine-row:hover {
  background-color: var(--elevated);
}
.engine-row:hover .engine-arrow {
  color: var(--crimson);
  transform: translateX(6px);
}

@media (max-width: 860px) {
  .engine-row {
    grid-template-columns: 1fr;
    gap: 0.75rem;
    padding: 1.5rem 0.75rem;
  }
}

.filter-btn {
  padding: 0.5rem 1.25rem;
  background-color: var(--carbon);
  color: var(--ash);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-btn);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  transition: all var(--transition-fast);
}
.filter-btn:hover {
  background-color: var(--elevated);
  color: var(--ivory);
}
.filter-btn.active {
  background-color: var(--crimson);
  color: var(--ivory);
  border-color: var(--crimson);
}

/* Form Styles */
.form-input, .form-textarea, .form-select {
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  background-color: var(--carbon);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-btn);
  padding: 0.875rem 1.25rem;
  color: var(--ivory);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 15px;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}
.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none;
  border-color: var(--crimson);
  background-color: var(--elevated);
}
.form-label {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ash);
  margin-bottom: 0.5rem;
  overflow-wrap: break-word;
}

/* Marquee / Ticker */
.marquee-container {
  overflow: hidden;
  white-space: nowrap;
  display: flex;
  width: 100%;
  user-select: none;
}
.marquee-track {
  display: flex;
  animation: marqueeScroll 28s linear infinite;
  gap: 3rem;
}
@keyframes marqueeScroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* Ambient Radial Glows */
.ambient-glow-crimson {
  position: absolute;
  width: clamp(240px, 70vw, 500px);
  height: clamp(240px, 70vw, 500px);
  max-width: 90vw;
  max-height: 90vw;
  background: radial-gradient(circle, rgba(196, 30, 58, 0.12) 0%, rgba(7, 7, 7, 0) 70%);
  pointer-events: none;
  border-radius: 50%;
  z-index: 0;
  overflow: hidden;
}

/* ==========================================================================
   Responsive Grid Overrides & Enhancements
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid,
  .manifesto-header-grid,
  .manifesto-split-grid,
  .ai-hero-split,
  .start-form-grid,
  .hero-case-grid,
  .case-subgrid {
    grid-template-columns: 1fr !important;
    gap: 2.5rem !important;
  }

  .bento-matrix > div {
    grid-column: span 12 !important;
  }

  .protocol-grid,
  .partner-profiles-grid,
  .evolution-grid,
  .case-phases-grid,
  .results-metrics-grid {
    grid-template-columns: repeat(2, 1fr) !important;
  }

  .treatises-grid {
    grid-template-columns: 1fr !important;
  }
}

@media (max-width: 768px) {
  .contrast-grid,
  .audience-grid,
  .work-preview-grid,
  .engine-detail-grid,
  .offers-grid,
  .franchises-grid,
  .protocol-grid,
  .partner-profiles-grid,
  .evolution-grid,
  .case-phases-grid,
  .results-metrics-grid,
  .hero-case-grid,
  .case-subgrid {
    grid-template-columns: 1fr !important;
    gap: 1.5rem !important;
  }

  .matrix-row {
    grid-template-columns: 1fr !important;
    gap: 0.5rem !important;
    padding: 1.25rem 0.5rem !important;
  }

  .work-telemetry-strip,
  .case-meta-strip,
  .metrics-strip,
  .insights-ledger-strip,
  .form-row-2 {
    grid-template-columns: 1fr !important;
    gap: 1rem !important;
  }

  .engine-detail-grid .engine-img-order {
    order: -1 !important;
  }

  .btn {
    white-space: normal;
    text-align: center;
    max-width: 100%;
  }

  .btn-lg {
    padding: 0.875rem 1.5rem;
    font-size: 12px;
    letter-spacing: 0.12em;
  }

  .ambient-glow-crimson {
    max-width: 75vw;
    max-height: 75vw;
  }
}

@media (max-width: 480px) {
  .btn-lg {
    padding: 0.875rem 1rem;
    font-size: 11px;
    letter-spacing: 0.10em;
  }
}