/* ==========================================================================
   THEORIFY — Design System & Stylesheet
   Strict Token Enforcement & Zero-bloat Architecture
   ========================================================================== */

:root {
  --ink: #0F172A;        /* Headlines, high-emphasis text */
  --slate: #64748B;      /* Body text, muted state */
  --slate-dark: #334155; /* Secondary text */
  --line: #E2E8F0;       /* Borders, dividers */
  --paper: #FFFFFF;      /* Default section background */
  --paper-2: #F8FAFC;    /* Alternating section background */
  --blue: #2563EB;       /* Accent, links, active state */
  --blue-hover: #1D4ED8; /* Hover state for blue buttons */
  --blue-subtle: #EFF6FF;/* Light blue tint */
  --blue-deep: #1E3A8A;  /* Deep blue highlight section */
  --amber: #F59E0B;      /* CTA BUTTONS ONLY */
  --amber-hover: #D97706;/* CTA hover */
  --amber-text: #78350F; /* Contrast text if needed */
  --green: #10B981;      /* Success/verified indicators */
  
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-img: 16px;
  --radius-full: 9999px;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 25px -5px rgba(15, 23, 42, 0.08);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --container-max: 1200px;
  --measure: 65ch;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--paper);
  color: var(--slate-dark);
  line-height: 1.65;
  font-size: 1.0625rem;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Typography Scale */
h1, h2, h3, h4 {
  color: var(--ink);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
}

h3 {
  font-size: 1.25rem;
  line-height: 1.35;
}

p {
  max-width: var(--measure);
}

a {
  color: var(--blue);
  text-decoration: none;
  transition: color 0.15s ease, border-color 0.15s ease;
}

a:hover {
  color: var(--blue-hover);
}

/* Eyebrow badge */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--blue);
  margin-bottom: 1rem;
}

.eyebrow-dark {
  color: #93C5FD;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1rem, 4vw, 2rem);
  padding-right: clamp(1rem, 4vw, 2rem);
}

.section {
  padding-top: clamp(3.5rem, 8vw, 6rem);
  padding-bottom: clamp(3.5rem, 8vw, 6rem);
}

.section-alt {
  background-color: var(--paper-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-dark {
  background-color: var(--blue-deep);
  color: #E2E8F0;
}

.section-dark h1, .section-dark h2, .section-dark h3 {
  color: #FFFFFF;
}

.section-dark p {
  color: #CBD5E1;
}

.section-header {
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.section-header p {
  margin-top: 0.75rem;
  font-size: 1.125rem;
  color: var(--slate);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.375rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-btn);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s ease;
  white-space: nowrap;
  line-height: 1.2;
}

.btn-primary {
  background-color: var(--amber);
  color: #1E293B;
  border-color: var(--amber);
  font-weight: 700;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.btn-primary:hover {
  background-color: var(--amber-hover);
  border-color: var(--amber-hover);
  color: #0F172A;
}

.btn-secondary {
  background-color: var(--paper);
  color: var(--ink);
  border-color: var(--line);
}

.btn-secondary:hover {
  background-color: var(--paper-2);
  border-color: #CBD5E1;
  color: var(--ink);
}

.btn-outline-blue {
  background-color: transparent;
  color: var(--blue);
  border-color: var(--blue);
}

.btn-outline-blue:hover {
  background-color: var(--blue-subtle);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  height: 72px;
  display: flex;
  align-items: center;
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  color: var(--ink);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
}

.brand-icon {
  width: 32px;
  height: 32px;
  background-color: var(--ink);
  color: #FFFFFF;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.125rem;
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.75rem;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--slate-dark);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

.nav-cta {
  margin-left: 0.5rem;
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius-btn);
  padding: 0.5rem;
  cursor: pointer;
  color: var(--ink);
}

/* Mobile Navigation Drawer */
.mobile-nav {
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--paper);
  z-index: 999;
  padding: 1.5rem;
  display: none;
  flex-direction: column;
  gap: 1.25rem;
  border-top: 1px solid var(--line);
  overflow-y: auto;
}

.mobile-nav.open {
  display: flex;
}

.mobile-nav .nav-link {
  font-size: 1.125rem;
  font-weight: 600;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
}

.mobile-nav .btn {
  width: 100%;
  margin-top: 1rem;
}

/* Hero Section */
.hero {
  padding-top: clamp(2.5rem, 6vw, 4.5rem);
  padding-bottom: clamp(3rem, 7vw, 5rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
}

.hero-sub {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 700;
  color: var(--blue);
  margin-top: 0.5rem;
  margin-bottom: 1rem;
}

.hero-body {
  font-size: 1.125rem;
  color: var(--slate-dark);
  margin-bottom: 1.75rem;
  line-height: 1.6;
}

.hero-notice {
  font-size: 0.875rem;
  color: var(--slate);
  margin-top: 0.75rem;
}

.trust-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink);
}

.trust-item svg {
  color: var(--blue);
  flex-shrink: 0;
}

/* Card Grids */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}

/* Standard Card */
.card {
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 1.75rem;
  transition: border-color 0.2s ease, transform 0.2s ease;
  display: flex;
  flex-direction: column;
}

.card:hover {
  border-color: #CBD5E1;
}

.card-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 0.75rem;
}

.card-body {
  color: var(--slate-dark);
  font-size: 0.9375rem;
  line-height: 1.6;
  flex-grow: 1;
}

/* Problem-Solution Customer Voice Cards */
.problem-card {
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.problem-quote {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.35;
  border-left: 3px solid var(--amber);
  padding-left: 0.875rem;
}

.solution-text {
  font-size: 0.9375rem;
  color: var(--slate-dark);
  line-height: 1.6;
}

/* How We Work 4-Step */
.process-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  position: relative;
}

.process-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 1.75rem;
}

.process-step {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--blue);
  margin-bottom: 0.75rem;
}

.process-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--ink);
}

.process-desc {
  font-size: 0.9375rem;
  color: var(--slate-dark);
}

/* Pricing Callout Box */
.pricing-banner {
  background-color: var(--blue-subtle);
  border: 1px solid #BFDBFE;
  border-radius: var(--radius-card);
  padding: 1.5rem 2rem;
  margin-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.pricing-banner p {
  color: #1E3A8A;
  font-size: 1rem;
  font-weight: 500;
}

.pricing-banner strong {
  color: #1E3A8A;
  font-weight: 700;
}

/* Numbers & Attribution */
.numbers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  padding: 2.5rem 0;
}

.number-card {
  border-left: 3px solid var(--blue);
  padding-left: 1.25rem;
}

.number-val {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 800;
  color: var(--ink);
  line-height: 1.1;
  margin-bottom: 0.5rem;
}

.number-label {
  font-size: 0.9375rem;
  color: var(--slate-dark);
  line-height: 1.5;
}

.number-attr {
  display: inline-block;
  font-size: 0.8125rem;
  color: var(--slate);
  margin-top: 0.5rem;
  font-weight: 500;
}

/* Who We're Not For */
.not-for-box {
  background-color: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 1.5rem;
  margin: 2.5rem 0;
  font-size: 0.9375rem;
  color: var(--slate-dark);
}

.not-for-box strong {
  color: var(--ink);
}

/* Vector Graphic Containers */
.graphic-box {
  background-color: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
}

.browser-mock {
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.browser-bar {
  background: #F1F5F9;
  border-bottom: 1px solid var(--line);
  padding: 8px 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.browser-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #CBD5E1;
}

.browser-content {
  padding: 16px;
  display: flex;
  gap: 16px;
}

.mock-sidebar {
  width: 54px;
  background: #F8FAFC;
  border-radius: 6px;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mock-sidebar-line {
  height: 6px;
  background: #E2E8F0;
  border-radius: 3px;
}

.mock-main {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mock-stat-row {
  display: flex;
  gap: 8px;
}

.mock-stat-pill {
  flex: 1;
  background: #F1F5F9;
  border-radius: 6px;
  padding: 8px;
}

.mock-stat-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--blue);
}

.mock-stat-text {
  font-size: 0.625rem;
  color: var(--slate);
}

.mock-chart {
  background: #F8FAFC;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px;
  height: 90px;
  display: flex;
  align-items: flex-end;
  gap: 8px;
}

.mock-bar {
  flex: 1;
  background: var(--blue);
  border-radius: 3px 3px 0 0;
  opacity: 0.85;
}

/* Sticky WhatsApp Floating Button on Mobile */
.sticky-whatsapp {
  display: none;
}

@media (max-width: 768px) {
  .sticky-whatsapp {
    display: flex;
    position: fixed;
    bottom: 16px;
    left: 16px;
    right: 16px;
    z-index: 998;
    background-color: var(--amber);
    color: #1E293B;
    font-weight: 700;
    padding: 0.875rem 1.25rem;
    border-radius: var(--radius-btn);
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    text-decoration: none;
  }
}

/* Footer */
.site-footer {
  background-color: var(--paper-2);
  border-top: 1px solid var(--line);
  padding: clamp(3rem, 6vw, 4.5rem) 0 2rem 0;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr;
  gap: clamp(2rem, 4vw, 3rem);
  margin-bottom: 3rem;
}

.footer-col h4 {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink);
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.footer-links a {
  font-size: 0.9375rem;
  color: var(--slate);
}

.footer-links a:hover {
  color: var(--blue);
}

.footer-contact-item {
  font-size: 0.9375rem;
  color: var(--slate-dark);
  margin-bottom: 0.5rem;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--slate);
}

/* Forms */
.form-group {
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--ink);
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-btn);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* Case Study Specifics */
.case-hero {
  padding: clamp(2.5rem, 5vw, 4rem) 0;
  border-bottom: 1px solid var(--line);
}

.case-meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
  padding: 1.5rem;
  background-color: var(--paper-2);
  border-radius: var(--radius-card);
  border: 1px solid var(--line);
}

.case-meta-item strong {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--slate);
  margin-bottom: 0.25rem;
}

.case-meta-item span {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
}

.case-impact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.case-impact-card {
  border-left: 3px solid var(--blue);
  padding-left: 1rem;
}

.case-impact-card strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.875rem;
  font-weight: 800;
  color: var(--ink);
}

.case-impact-card p {
  font-size: 0.875rem;
  color: var(--slate);
}

/* Re-enable when there are 8+ case studies — filters are pointless while each returns one result */
.filter-row {
  display: none;
}

/* Responsive Overrides */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .nav-links, .nav-cta {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 600px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .btn-group {
    flex-direction: column;
    align-items: stretch;
  }
  .btn {
    width: 100%;
  }
}