/* ===================================
   Optea Homepage - Design System
   Medical SaaS with Premium Aesthetics
   =================================== */

/* === CSS Variables === */
:root {
  /* Primary Colors - Medical Blue Palette */
  --color-primary: #0066CC;
  --color-primary-light: #3385DB;
  --color-primary-dark: #004C99;
  --color-primary-subtle: #E6F2FF;

  /* Accent Colors */
  --color-accent: #00B8A9;
  --color-accent-light: #33C9BC;
  --color-accent-dark: #008C7F;

  /* Semantic Colors */
  --color-success: #00C853;
  --color-warning: #FF9800;
  --color-danger: #F44336;

  /* Neutrals */
  --color-white: #FFFFFF;
  --color-gray-50: #F8FAFC;
  --color-gray-100: #F1F5F9;
  --color-gray-200: #E2E8F0;
  --color-gray-300: #CBD5E1;
  --color-gray-400: #94A3B8;
  --color-gray-500: #64748B;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1E293B;
  --color-gray-900: #0F172A;

  /* Typography */
  --font-primary: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
}

/* === Reset & Base Styles === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 120px;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: 1.7;
  color: var(--color-gray-800);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === Typography === */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--font-size-5xl);
}

h2 {
  font-size: var(--font-size-4xl);
}

h3 {
  font-size: var(--font-size-3xl);
}

h4 {
  font-size: var(--font-size-2xl);
}

h5 {
  font-size: var(--font-size-xl);
}

h6 {
  font-size: var(--font-size-lg);
}

p {
  margin-bottom: var(--spacing-md);
}

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

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

/* === Layout === */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: 6rem 0;
  position: relative;
}

.section-alt {
  background-color: var(--color-gray-50);
}

/* === Header & Navigation === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid var(--color-gray-200);
  padding: var(--spacing-md) 0;
  box-shadow: var(--shadow-sm);
}

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

.logo {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo img {
  height: 64px;
  width: auto;
  transition: transform 0.3s ease;
}

.logo img:hover {
  transform: scale(1.05);
}

.nav {
  display: flex;
  gap: var(--spacing-xl);
  align-items: center;
}

.nav-link {
  text-decoration: none;
  color: var(--color-gray-700);
  font-weight: 500;
  transition: var(--transition-base);
}

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

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 21px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1100;
}

.mobile-menu-toggle span {
  width: 100%;
  height: 3px;
  background-color: var(--color-primary);
  border-radius: 3px;
  transition: all 0.3s ease;
}

.header.menu-open .mobile-menu-toggle span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.header.menu-open .mobile-menu-toggle span:nth-child(2) {
  opacity: 0;
}

.header.menu-open .mobile-menu-toggle span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-base);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background-color: var(--color-white);
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
  background-color: var(--color-primary-subtle);
}

.btn-large {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: var(--font-size-lg);
}

/* === Hero Section === */
.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #0066CC 0%, #004C99 100%);
  color: var(--color-white);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><rect width="100" height="100" fill="none"/><circle cx="50" cy="50" r="1" fill="rgba(255,255,255,0.1)"/></svg>');
  opacity: 0.3;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--spacing-xl);
  color: var(--color-white);
}

.hero-description {
  font-size: var(--font-size-xl);
  line-height: 1.8;
  margin-bottom: var(--spacing-2xl);
  color: rgba(255, 255, 255, 0.9);
}

.hero-cta {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

/* === Cards === */
.card {
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.card-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-lg);
}

.card-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--color-gray-900);
}

.card-description {
  color: var(--color-gray-600);
  line-height: 1.7;
}

/* === Grid Layouts === */
.grid {
  display: grid;
  gap: var(--spacing-xl);
}

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

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* === Section Headers === */
.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--spacing-xl);
}

.section-subtitle {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-sm);
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  margin-bottom: var(--spacing-lg);
}

.section-description {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
}

/* === Problem Section === */
.problem-item {
  display: flex;
  gap: var(--spacing-lg);
  padding: var(--spacing-xl);
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  border-left: 6px solid var(--color-danger);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.problem-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}

.problem-icon {
  font-size: var(--font-size-3xl);
  flex-shrink: 0;
}

.problem-content h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-sm);
}

.problem-content p {
  color: var(--color-gray-600);
  margin-bottom: 0;
}

/* === Cost Reduction Section === */
/* (Consolidated into Layout section) */

.cost-pillar {
  background-color: var(--color-white);
  /* Simplified from gradient */
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  border: 2px solid var(--color-gray-200);
  transition: all var(--transition-base);
}

.cost-pillar:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
}

.cost-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: var(--font-size-2xl);
  font-weight: 800;
  border-radius: 50%;
  margin-bottom: var(--spacing-lg);
}

.cost-highlight {
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin: var(--spacing-lg) 0;
  font-weight: 600;
}

.cost-calculation {
  background-color: var(--color-white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  margin: var(--spacing-lg) 0;
  border: 1px solid var(--color-gray-200);
  border-left: 6px solid var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.cost-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-xs);
  border-bottom: 1px dashed var(--color-gray-200);
  padding-bottom: var(--spacing-xs);
}

.cost-row:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.cost-label {
  color: var(--color-gray-600);
  font-size: var(--font-size-sm);
}

.cost-value {
  font-weight: 700;
  color: var(--color-gray-800);
}

.cost-total {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 2px solid var(--color-gray-200);
  text-align: right;
  font-weight: 800;
  font-size: var(--font-size-xl);
  color: var(--color-danger);
}

/* === Pricing Section === */
.pricing-card {
  background: linear-gradient(135deg, var(--color-white) 0%, var(--color-primary-subtle) 100%);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-xl);
  text-align: center;
  border: 3px solid var(--color-primary);
  box-shadow: var(--shadow-xl);
  max-width: 600px;
  margin: 0 auto;
}

.pricing-amount {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--color-primary);
  margin: var(--spacing-md) 0;
}

.pricing-period {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
}

.pricing-features {
  list-style: none;
  margin: var(--spacing-xl) 0;
  text-align: left;
}

.pricing-features li {
  padding: var(--spacing-sm);
  border-bottom: 1px solid var(--color-gray-200);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.pricing-features li::before {
  content: '✓';
  color: var(--color-success);
  font-weight: 800;
  font-size: var(--font-size-xl);
}

/* === Target Audience === */
.audience-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
}

.audience-card {
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
}

.audience-good {
  background: linear-gradient(135deg, #E8F5E9 0%, #C8E6C9 100%);
  border: 2px solid var(--color-success);
}

.audience-bad {
  background: linear-gradient(135deg, #FFEBEE 0%, #FFCDD2 100%);
  border: 2px solid var(--color-danger);
}

.audience-card h3 {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-lg);
}

.audience-card ul {
  list-style: none;
}

.audience-card li {
  padding: var(--spacing-sm) 0;
  padding-left: var(--spacing-lg);
  position: relative;
}

.audience-good li::before {
  content: '○';
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: 800;
}

.audience-bad li::before {
  content: '×';
  position: absolute;
  left: 0;
  color: var(--color-danger);
  font-weight: 800;
}

/* === Quick Summary (Bridge) === */
.quick-summary {
  background: var(--color-white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  margin-top: -4rem;
  border: 1px solid var(--color-gray-200);
  position: relative;
  z-index: 50;
}

.quick-summary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
  border-bottom: 1px dashed var(--color-gray-200);
  padding-bottom: 1.5rem;
  margin-bottom: 1.5rem;
}

.quick-summary-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.quick-summary-item .check-icon {
  color: var(--color-accent);
  font-weight: 900;
  font-size: 1.25rem;
}

.quick-summary-item p {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-gray-800);
}

.quick-summary-item p span {
  color: var(--color-accent);
}

.quick-summary-footer {
  text-align: center;
}

.quick-summary-footer p {
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--color-gray-900);
  margin: 0;
}

/* === Improvement Simulator === */
.simulator-card {
  background: white;
  border-radius: var(--radius-2xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-xl);
  max-width: 900px;
  margin: 0 auto;
  /* Removed negative margin to rely on section spacing */
  position: relative;
  z-index: 10;
  border: 1px solid var(--color-gray-200);
}

.simulator-input-group {
  display: flex;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  align-items: flex-end;
}

.simulator-field {
  flex: 1;
}

.simulator-field label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-gray-700);
  margin-bottom: var(--spacing-xs);
}

.simulator-field input {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  font-size: var(--font-size-lg);
  font-family: inherit;
  transition: border-color var(--transition-fast);
}

.simulator-field input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.simulator-result {
  background: var(--color-primary-subtle);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
}

.simulator-result-value {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--color-primary);
  margin: var(--spacing-xs) 0;
}

/* === Roadmap === */
.roadmap {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
  position: relative;
}

.roadmap::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 15%;
  right: 15%;
  height: 2px;
  background: var(--color-primary);
  opacity: 0.2;
  z-index: 0;
}

.roadmap-step {
  flex: 1;
  background: white;
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  position: relative;
  z-index: 1;
  border: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-sm);
}

.roadmap-badge {
  width: 96px;
  height: 96px;
  background: var(--color-white);
  border: 4px solid var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  margin: 0 auto var(--spacing-lg);
  color: var(--color-primary);
  font-size: var(--font-size-base);
  line-height: 1;
  text-align: center;
}

/* === Positioning Map === */
.pos-map-container {
  max-width: 800px;
  margin: 4rem auto;
  position: relative;
  background: var(--color-white);
  padding: 3rem;
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-xl);
}

.pos-map {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  background: var(--color-gray-50);
  border-left: 2px solid var(--color-gray-400);
  border-bottom: 2px solid var(--color-gray-400);
  margin-top: 2rem;
}

.pos-map::before {
  content: '経営可視化レベル';
  position: absolute;
  top: -2.5rem;
  left: -2rem;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-gray-600);
  writing-mode: vertical-rl;
}

.pos-map::after {
  content: '現場管理の深さ';
  position: absolute;
  bottom: -2.5rem;
  right: 0;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-gray-600);
}

.pos-item {
  position: absolute;
  padding: 0.75rem 1.25rem;
  background: white;
  border: 1px solid var(--color-gray-200);
  border-radius: 100px;
  font-size: 0.875rem;
  font-weight: 700;
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
  transition: all 0.3s ease;
}

.pos-item.optea {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
  font-size: 1.125rem;
  padding: 1rem 2rem;
  z-index: 10;
  box-shadow: 0 10px 20px rgba(0, 184, 169, 0.3);
}

.pos-item.inventory {
  bottom: 15%;
  left: 15%;
}

.pos-item.accounting {
  bottom: 10%;
  right: 10%;
}

.pos-item.erp {
  top: 40%;
  left: 40%;
}

.pos-item.optea {
  top: 10%;
  right: 10%;
}

/* === Comparison Table === */
.comparison-container {
  overflow-x: auto;
  margin: 3rem 0;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  min-width: 600px;
}

.comparison-table th,
.comparison-table td {
  padding: 1.25rem;
  text-align: center;
  border: 1px solid var(--color-gray-100);
}

.comparison-table th {
  background: var(--color-gray-50);
  font-weight: 700;
  color: var(--color-gray-800);
}

.comparison-table .feature-col {
  text-align: left;
  background: var(--color-gray-50);
  font-weight: 700;
  width: 25%;
}

.comparison-table .optea-col {
  background: rgba(0, 184, 169, 0.05);
  border: 2px solid var(--color-accent);
  color: var(--color-gray-900);
  font-weight: 700;
}

/* === Case Study === */
.case-study-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.case-study-card {
  background: var(--color-white);
  padding: 2.5rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  border-top: 5px solid var(--color-accent);
}

.case-study-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
  padding: 1.5rem 0;
  border-top: 1px solid var(--color-gray-100);
  border-bottom: 1px solid var(--color-gray-100);
}

.case-study-stat-label {
  font-size: 0.75rem;
  color: var(--color-gray-500);
  margin-bottom: 0.25rem;
}

.case-study-stat-value {
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--color-gray-900);
}

.case-study-quote {
  font-style: italic;
  color: var(--color-gray-600);
  position: relative;
  padding-left: 1.5rem;
}

.case-study-quote::before {
  content: '“';
  position: absolute;
  left: 0;
  top: 0;
  font-size: 2rem;
  color: var(--color-accent);
  opacity: 0.3;
  line-height: 1;
}

/* === Footer === */
.footer {
  background-color: var(--color-gray-900);
  color: var(--color-gray-300);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

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

.footer-logo {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: var(--spacing-lg);
}

/* === Animations === */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease-out;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* === Responsive Design === */
@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
  }

  /* Navigation Toggle */
  .mobile-menu-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    background: white;
    padding: var(--spacing-xl);
    flex-direction: column;
    border-bottom: 2px solid var(--color-primary);
    transform: translateY(-150%);
    transition: transform 0.3s ease;
    box-shadow: var(--shadow-xl);
  }

  .header.menu-open .nav {
    transform: translateY(0);
  }

  .nav .btn-primary {
    width: 100%;
  }

  .hero {
    min-height: 70vh;
    padding-top: 100px;
  }

  .hero-title {
    font-size: var(--font-size-3xl);
  }

  .hero-cta {
    flex-direction: column;
  }

  .quick-summary {
    margin-top: -2rem;
  }

  .quick-summary-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

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

  .section {
    padding: var(--spacing-3xl) 0;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  /* Positioning Map Mobile */
  .pos-map-container {
    height: auto;
    padding: 2rem 0;
  }

  .pos-map {
    height: auto;
    background: none;
    border: none;
    padding-left: 0;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
  }

  .pos-map::before,
  .pos-map::after {
    display: none;
  }

  .pos-item {
    position: relative;
    top: auto !important;
    bottom: auto !important;
    left: auto !important;
    right: auto !important;
    transform: none !important;
    width: 100%;
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-gray-200);
    box-shadow: var(--shadow-sm);
    text-align: left;
  }

  .pos-item.optea {
    order: -1;
    border: 2px solid var(--color-accent);
    background: var(--color-primary-subtle);
    color: var(--color-primary);
  }

  .roadmap {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .roadmap-step::after {
    display: none;
  }

  .roadmap-badge {
    margin-bottom: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }

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

  .btn {
    width: 100%;
  }
}

/* === Phase 10: Concrete Evidence Styles === */

/* Case Studies */
.case-study-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-2xl);
}

.case-study-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-gray-100);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
}

.case-study-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.case-study-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
  background: var(--color-gray-50);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  border: 1px solid var(--color-gray-200);
}

.case-study-stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
  font-weight: 700;
  margin-bottom: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.case-study-stat-value {
  font-size: var(--font-size-lg);
  font-weight: 800;
  color: var(--color-primary);
}

.case-study-quote {
  font-style: italic;
  color: var(--color-gray-700);
  line-height: 1.8;
  padding-left: var(--spacing-md);
  border-left: 4px solid var(--color-accent);
  margin-top: auto;
}

/* Comparison Table */
.comparison-container {
  overflow-x: auto;
  margin-top: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-gray-200);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-white);
  min-width: 800px;
}

.comparison-table th,
.comparison-table td {
  padding: 1.5rem;
  text-align: center;
  border-bottom: 1px solid var(--color-gray-200);
  font-size: 0.9375rem;
}

.comparison-table th {
  background: var(--color-gray-50);
  font-weight: 700;
  color: var(--color-gray-800);
  white-space: nowrap;
}

.comparison-table td.feature-col {
  text-align: left;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-gray-50);
  position: sticky;
  left: 0;
  z-index: 1;
}

.comparison-table td.optea-col,
.comparison-table th.optea-col {
  background: rgba(0, 184, 169, 0.05);
  font-weight: 800;
  color: var(--color-primary);
  border-left: 2px solid var(--color-accent);
  border-right: 2px solid var(--color-accent);
}

/* Dashboard Mockup Grid */
.dashboard-mockup-grid {
  padding: 2rem;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 2rem;
}

.dashboard-mockup-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.dashboard-mockup-main {
  background: rgba(255, 255, 255, 0.03);
  border-radius: 0.75rem;
  padding: 1.5rem;
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

@media (max-width: 1024px) {
  .hero-title {
    font-size: var(--font-size-4xl);
  }
}

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

@media (max-width: 768px) {
  .case-study-grid {
    grid-template-columns: 1fr;
  }
}