/* ============================================================
   ERPilot Landing Page — Global Styles
   ============================================================ */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

/* ---------- CSS Variables ---------- */
:root {
  --color-primary: #4F46E5;
  --color-primary-dark: #3730A3;
  --color-primary-light: #EEF2FF;
  --color-accent: #10B981;
  --color-accent-dark: #059669;
  --color-amber: #F59E0B;
  --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;

  --font-family: 'Inter', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', sans-serif;
  --container-max: 1200px;
  --header-height: 68px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.10);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --transition: 0.2s ease;
}

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

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

body {
  font-family: var(--font-family);
  color: var(--color-gray-800);
  background: var(--color-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

/* ---------- Container ---------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-gray-200);
  z-index: 1000;
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 48px;
  text-decoration: none;
}

.logo-img {
  height: 36px;
  width: auto;
  object-fit: contain;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-gray-600);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

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

.nav-link.active {
  color: var(--color-primary);
  font-weight: 600;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  box-shadow: 0 4px 16px rgba(79, 70, 229, 0.35);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  background: var(--color-primary-light);
  transform: translateY(-1px);
}

.btn-accent {
  background: var(--color-accent);
  color: var(--color-white);
}

.btn-accent:hover {
  background: var(--color-accent-dark);
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.35);
  transform: translateY(-1px);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.15);
  color: var(--color-white);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.25);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
}

.btn-lg {
  padding: 16px 32px;
  font-size: 16px;
  border-radius: var(--radius-md);
}

/* ---------- Section Common ---------- */
.section {
  padding: 96px 0;
}

.section-sm {
  padding: 64px 0;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-badge.indigo {
  background: var(--color-primary-light);
  color: var(--color-primary);
  border: 1px solid rgba(79, 70, 229, 0.2);
}

.section-badge.emerald {
  background: #ECFDF5;
  color: var(--color-accent);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.section-badge.amber {
  background: #FFFBEB;
  color: var(--color-amber);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.section-badge.white {
  background: rgba(255, 255, 255, 0.15);
  color: var(--color-white);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  color: var(--color-gray-900);
  line-height: 1.25;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.section-header p {
  font-size: 17px;
  color: var(--color-gray-500);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ---------- Cards ---------- */
.card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.card-body {
  padding: 28px;
}

/* ---------- Icon Box ---------- */
.icon-box {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.icon-box.indigo {
  background: var(--color-primary-light);
}

.icon-box.emerald {
  background: #ECFDF5;
}

.icon-box.amber {
  background: #FFFBEB;
}

.icon-box.purple {
  background: #F5F3FF;
}

/* ---------- Grid Layouts ---------- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {

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

/* ---------- Hero Section ---------- */
.hero {
  padding: calc(var(--header-height) + 80px) 0 80px;
  background: linear-gradient(135deg, #EEF2FF 0%, #F8FAFC 50%, #ECFDF5 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.08) 0%, transparent 70%);
  top: -200px;
  right: -100px;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.08) 0%, transparent 70%);
  bottom: -100px;
  left: 10%;
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--color-primary-light);
  border: 1px solid rgba(79, 70, 229, 0.2);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.05em;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(32px, 4.5vw, 52px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.04em;
  color: var(--color-gray-900);
  margin-bottom: 20px;
}

.hero h1 .highlight {
  color: var(--color-primary);
}

.hero-desc {
  font-size: 17px;
  color: var(--color-gray-600);
  line-height: 1.8;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-trust {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-gray-600);
  font-weight: 500;
}

.trust-icon {
  font-size: 16px;
}

.trust-divider {
  width: 1px;
  height: 16px;
  background: var(--color-gray-300);
}

.hero-visual {
  position: relative;
}

.hero-slider-container {
  position: relative;
  width: 100%;
}

.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  opacity: 0;
  visibility: hidden;
  transition: opacity 1.2s ease-in-out;
}

.hero-slide.active {
  opacity: 1;
  visibility: visible;
  position: relative;
}

.hero-screenshot {
  width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-gray-200);
}

.hero-slide-heading {
  font-size: clamp(32px, 4.5vw, 52px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.04em;
  color: var(--color-gray-900);
  margin-bottom: 20px;
}

.hero-slide-heading .highlight {
  color: var(--color-primary);
}

/* ---------- Hero Slider Indicators ---------- */
.hero-slider-indicators {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 40px;
  position: relative;
  z-index: 10;
}

.hero-slider-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-gray-300);
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  padding: 0;
}

.hero-slider-dot:hover {
  background: var(--color-gray-400);
  transform: scale(1.1);
}

.hero-slider-dot.active {
  background: var(--color-primary);
  width: 32px;
  border-radius: 6px;
}

.hero-float-badge {
  position: absolute;
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
}

.hero-float-badge.top-left {
  top: -16px;
  left: -16px;
}

.hero-float-badge.bottom-right {
  bottom: -16px;
  right: -16px;
}

@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    display: none;
  }
}

/* ---------- Pain Section ---------- */
.pain-section {
  background: linear-gradient(135deg, var(--color-gray-900) 0%, #1a1a2e 100%);
  color: var(--color-white);
}

.pain-section .section-header h2 {
  color: var(--color-white);
}

.pain-section .section-header p {
  color: rgba(255, 255, 255, 0.65);
}

.pain-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: background var(--transition), transform var(--transition);
}

.pain-card:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-4px);
}

.pain-icon {
  font-size: 32px;
}

.pain-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-white);
}

.pain-card p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.7;
}

/* ---------- Solution Section ---------- */
.solution-section {
  background: var(--color-white);
}

.flow-steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
  position: relative;
  margin-top: 56px;
}

.flow-step {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
}

.flow-step:not(:last-child)::after {
  content: '→';
  position: absolute;
  top: 22px;
  right: -16px;
  font-size: 18px;
  color: var(--color-gray-300);
  font-weight: 400;
  z-index: 1;
}

.flow-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 16px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  position: relative;
  z-index: 2;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.flow-step h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: 8px;
  line-height: 1.4;
}

.flow-step p {
  font-size: 12px;
  color: var(--color-gray-500);
  line-height: 1.6;
  padding: 0 8px;
}

@media (max-width: 768px) {
  .flow-steps {
    flex-direction: column;
    align-items: center;
    gap: 24px;
  }

  .flow-step:not(:last-child)::after {
    content: '↓';
    top: auto;
    bottom: -20px;
    right: 50%;
    transform: translateX(50%);
  }

  .flow-step {
    width: 100%;
    max-width: 280px;
  }
}

/* ---------- Features Section ---------- */
.features-section {
  background: var(--color-gray-50);
}

.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 56px 0;
  border-bottom: 1px solid var(--color-gray-200);
}

.feature-block:last-child {
  border-bottom: none;
}

.feature-block.reverse {
  direction: rtl;
}

.feature-block.reverse>* {
  direction: ltr;
}

.feature-step {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}

.feature-block h3 {
  font-size: 26px;
  font-weight: 800;
  color: var(--color-gray-900);
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.feature-block p {
  font-size: 15px;
  color: var(--color-gray-600);
  line-height: 1.8;
  margin-bottom: 24px;
}

.feature-points {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 28px;
}

.feature-point {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-gray-700);
}

.feature-point::before {
  content: '✓';
  width: 20px;
  height: 20px;
  background: #ECFDF5;
  color: var(--color-accent);
  border-radius: 50%;
  font-size: 11px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.feature-screenshot {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-gray-200);
  width: 100%;
}

.feature-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  transition: gap var(--transition);
}

.feature-link:hover {
  gap: 10px;
}

@media (max-width: 768px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .feature-block.reverse {
    direction: ltr;
  }
}

/* ---------- CTA Section ---------- */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, #6D28D9 100%);
  color: var(--color-white);
  text-align: center;
}

.cta-section h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.3;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.7;
  margin-bottom: 36px;
}

.cta-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-gray-900);
  color: rgba(255, 255, 255, 0.6);
  padding: 64px 0 32px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand {
  max-width: 280px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 16px;
}

.footer-logo img {
  width: 28px;
  height: 28px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.55);
}

.footer-col h4 {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col ul li a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  transition: color var(--transition);
}

.footer-col ul li a:hover {
  color: var(--color-white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
}

@media (max-width: 768px) {
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}

/* ============================================================
   Feature Page Specific Styles
   ============================================================ */

/* ---------- Feature Hero ---------- */
.feature-hero {
  padding: calc(var(--header-height) + 56px) 0 56px;
  background: linear-gradient(135deg, #EEF2FF 0%, #F8FAFC 60%, #ECFDF5 100%);
  position: relative;
  overflow: hidden;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-gray-500);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: var(--color-primary);
  font-weight: 500;
  transition: color var(--transition);
}

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

.breadcrumb span {
  color: var(--color-gray-400);
}

.feature-hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.feature-step-badge {
  display: inline-block;
  padding: 4px 12px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 100px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.feature-hero h1 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 900;
  color: var(--color-gray-900);
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 16px;
}

.feature-hero-desc {
  font-size: 16px;
  color: var(--color-gray-600);
  line-height: 1.8;
  margin-bottom: 32px;
}

.feature-hero-img {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-gray-200);
  width: 100%;
}

@media (max-width: 768px) {
  .feature-hero-inner {
    grid-template-columns: 1fr;
  }

  .feature-hero-img-wrap {
    display: none;
  }
}

/* ---------- Key Features ---------- */
.key-features-section {
  background: var(--color-white);
}

.key-feature-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: transform var(--transition), box-shadow var(--transition);
}

.key-feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(79, 70, 229, 0.2);
}

.key-feature-icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.key-feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: 10px;
}

.key-feature-card p {
  font-size: 14px;
  color: var(--color-gray-500);
  line-height: 1.8;
}

/* ---------- Screen Gallery ---------- */
.gallery-section {
  background: var(--color-gray-50);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.gallery-item {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
}

.gallery-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.gallery-item img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.gallery-item-label {
  padding: 12px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-gray-700);
}

@media (max-width: 640px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Feature Navigation ---------- */
.feature-nav-section {
  background: var(--color-white);
  border-top: 1px solid var(--color-gray-200);
}

.feature-nav-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.feature-nav-card {
  background: var(--color-gray-50);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: all var(--transition);
}

.feature-nav-card:hover {
  background: var(--color-primary-light);
  border-color: rgba(79, 70, 229, 0.25);
  transform: translateY(-2px);
}

.feature-nav-step {
  font-size: 11px;
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.feature-nav-card h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-gray-900);
}

.feature-nav-card p {
  font-size: 12px;
  color: var(--color-gray-500);
  line-height: 1.5;
}

.feature-nav-arrow {
  font-size: 16px;
  color: var(--color-primary);
  margin-top: 8px;
}

@media (max-width: 1024px) {
  .feature-nav-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .feature-nav-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Image Lightbox ---------- */
.lightbox-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.88);
  z-index: 9999;
  padding: 40px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.lightbox-overlay.active {
  display: flex;
}

.lightbox-img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  cursor: default;
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 24px;
  color: var(--color-white);
  font-size: 32px;
  cursor: pointer;
  line-height: 1;
  transition: opacity var(--transition);
}

.lightbox-close:hover {
  opacity: 0.7;
}

/* ---------- Mobile Menu ---------- */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-gray-700);
  border-radius: 2px;
  transition: all var(--transition);
}

.hamburger.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.open span:nth-child(2) {
  opacity: 0;
}

.hamburger.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
  padding: 16px 24px;
  flex-direction: column;
  gap: 4px;
  box-shadow: var(--shadow-md);
  z-index: 999;
}

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

.mobile-nav .nav-link {
  padding: 12px 16px;
  width: 100%;
  display: block;
}

.mobile-nav .btn {
  width: 100%;
  justify-content: center;
  margin-top: 8px;
}

@media (max-width: 900px) {

  .nav,
  .header-cta {
    display: none;
  }

  .hamburger {
    display: flex;
  }
}

/* ---------- Animations ---------- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }

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

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

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

.animate-delay-1 {
  animation-delay: 0.1s;
}

.animate-delay-2 {
  animation-delay: 0.2s;
}

.animate-delay-3 {
  animation-delay: 0.3s;
}

.animate-delay-4 {
  animation-delay: 0.4s;
}

/* Intersection Observer driven animations */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Utility ---------- */
.text-center {
  text-align: center;
}

.mt-4 {
  margin-top: 4px;
}

.mt-8 {
  margin-top: 8px;
}

.mt-16 {
  margin-top: 16px;
}

.mt-24 {
  margin-top: 24px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

/* Cloudflare Turnstile コンテナ（invisible 用・最小表示） */
.turnstile-container {
  min-height: 1px;
  margin: 0;
}

/* スパム対策: ハニーポット（ボット用の隠しフィールド） */
.honeypot-field {
  opacity: 0;
  position: absolute;
  top: 0;
  left: 0;
  height: 0;
  width: 0;
  z-index: -1;
  pointer-events: none;
}