/* ===========================
   キレート銅 LP スタイルシート
   =========================== */

:root {
  --color-primary: #185FA5;
  --color-primary-dark: #0C447C;
  --color-primary-light: #378ADD;
  --color-accent: #BA7517;
  --color-accent-light: #EF9F27;
  --color-surface: #F3F7FB;
  --color-white: #ffffff;
  --color-text-main: #1a2233;
  --color-text-muted: #4a5a72;
  --color-text-light: #7a93b4;
  --color-border: #c8daf0;
  --font-heading: 'Noto Serif JP', 'Times New Roman', serif;
  --font-body: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', sans-serif;
  --font-latin: 'Cormorant Garamond', 'Georgia', serif;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(24, 95, 165, 0.08);
  --shadow-md: 0 6px 24px rgba(24, 95, 165, 0.12);
  --shadow-lg: 0 16px 48px rgba(24, 95, 165, 0.16);
  --transition: 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-body);
  color: var(--color-text-main);
  background: var(--color-white);
  line-height: 1.7;
  overflow-x: hidden;
}

/* ===========================
   TYPOGRAPHY
   =========================== */

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.02em;
}

.section-label {
  display: inline-block;
  font-family: var(--font-latin);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-primary-light);
  background: rgba(55, 138, 221, 0.1);
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  color: var(--color-text-main);
  margin-bottom: 1rem;
}

.section-title span {
  color: var(--color-primary);
}

.section-desc {
  color: var(--color-text-muted);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ===========================
   NAVIGATION
   =========================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  padding: 0 20px;
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-family: var(--font-latin);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  letter-spacing: 0.05em;
  text-decoration: none;
}

.nav-logo span {
  display: block;
  font-family: var(--font-body);
  font-size: 0.65rem;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  font-weight: 400;
}

.nav-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  transition: color var(--transition);
  letter-spacing: 0.05em;
}

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

.nav-cta {
  background: var(--color-primary);
  color: white !important;
  padding: 8px 20px;
  border-radius: 30px;
  font-size: 0.82rem !important;
  letter-spacing: 0.05em;
  transition: background var(--transition), transform var(--transition) !important;
}

.nav-cta:hover {
  background: var(--color-primary-dark) !important;
  transform: translateY(-1px);
  color: white !important;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav-hamburger span {
  width: 24px;
  height: 2px;
  background: var(--color-text-main);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===========================
   SECTION COMMONS
   =========================== */

section {
  padding: 80px 20px;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
}

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

/* ===========================
   HERO SECTION (Page 1)
   =========================== */

#hero {
  min-height: 100vh;
  background: linear-gradient(160deg, #E6F1FB 0%, #F3F7FB 50%, #FAEEDA 100%);
  display: flex;
  align-items: center;
  padding: 100px 20px 60px;
  position: relative;
  overflow: hidden;
}

#hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(55, 138, 221, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

#hero::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(186, 117, 23, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: white;
  border: 1px solid var(--color-border);
  border-radius: 30px;
  padding: 6px 16px;
  font-size: 0.78rem;
  color: var(--color-primary);
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
  font-family: var(--font-latin);
  letter-spacing: 0.05em;
}

.hero-badge::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--color-primary-light);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
  font-size: clamp(1.8rem, 4.5vw, 3rem);
  color: var(--color-text-main);
  margin-bottom: 1.2rem;
  line-height: 1.25;
}

.hero-title .accent {
  color: var(--color-primary);
  position: relative;
}

.hero-subtitle {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.hero-cta-group {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-primary);
  color: white;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition);
  box-shadow: 0 4px 16px rgba(24, 95, 165, 0.3);
  letter-spacing: 0.05em;
  cursor: pointer;
  border: none;
  font-family: var(--font-body);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(24, 95, 165, 0.35);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--color-primary);
  padding: 14px 28px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  border: 1.5px solid var(--color-primary);
  transition: all var(--transition);
  letter-spacing: 0.05em;
  cursor: pointer;
  font-family: var(--font-body);
}

.btn-secondary:hover {
  background: rgba(24, 95, 165, 0.06);
  transform: translateY(-2px);
}

.hero-visual {
  display: flex;
  justify-content: center;
  position: relative;
}

.hero-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  max-width: 400px;
  width: 100%;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-12px); }
}

.hero-card-title {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 1.2rem;
  font-family: var(--font-latin);
}

.mechanism-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.mstep {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 0;
  position: relative;
}

.mstep:not(:last-child)::after {
  content: '';
  position: absolute;
  left: 15px;
  top: 40px;
  width: 2px;
  height: calc(100% - 20px);
  background: var(--color-border);
}

.mstep-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
  z-index: 1;
}

.mstep-icon.red { background: #FCEBEB; color: #A32D2D; }
.mstep-icon.orange { background: #FAEEDA; color: #854F0B; }
.mstep-icon.amber { background: #FAF3D0; color: #856600; }
.mstep-icon.green { background: #E6F1FB; color: #185FA5; }
.mstep-icon.teal { background: #B5D4F4; color: #0C447C; }
.mstep-icon.blue { background: #E6F1FB; color: #185FA5; }

.mstep-text {
  font-size: 0.88rem;
  color: var(--color-text-main);
  font-weight: 500;
}

.mstep-sub {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 2px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 2rem;
}

.hero-stat {
  text-align: center;
}

.hero-stat-num {
  font-family: var(--font-latin);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-primary);
  display: block;
  line-height: 1;
}

.hero-stat-label {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  margin-top: 4px;
  display: block;
}

/* ===========================
   PROBLEM / MECHANISM (Page 2)
   =========================== */

#mechanism {
  background: var(--color-white);
  padding: 100px 20px;
}

.mechanism-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-top: 3rem;
}

.mechanism-diagram {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--color-border);
}

.ph-diagram {
  position: relative;
}

.ph-bar {
  height: 16px;
  border-radius: 10px;
  background: linear-gradient(to right, #E24B4A, #EF9F27, #378ADD);
  margin: 12px 0;
  position: relative;
}

.ph-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--color-text-muted);
  font-family: var(--font-latin);
}

.ph-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 8px 0;
}

.ph-zone {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.ph-zone-item {
  flex: 1;
  padding: 14px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
}

.ph-zone-item.acid {
  background: #FCEBEB;
  border-left: 3px solid #E24B4A;
}

.ph-zone-item.neutral {
  background: #E6F1FB;
  border-left: 3px solid #378ADD;
}

.ph-zone-item strong {
  display: block;
  font-size: 0.75rem;
  margin-bottom: 4px;
}

.mechanism-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.mechanism-list li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.mlist-num {
  width: 28px;
  height: 28px;
  background: var(--color-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

.mlist-text strong {
  display: block;
  font-size: 0.92rem;
  color: var(--color-text-main);
  margin-bottom: 4px;
}

.mlist-text p {
  font-size: 0.83rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ===========================
   EVIDENCE / RESULTS (Page 3)
   =========================== */

#evidence {
  background: var(--color-surface);
  padding: 100px 20px;
}

.evidence-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-top: 3rem;
}

.evidence-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.evidence-card-label {
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary-light);
  font-family: var(--font-latin);
  margin-bottom: 14px;
}

.evidence-card h3 {
  font-size: 1.05rem;
  margin-bottom: 16px;
  color: var(--color-text-main);
}

.result-bars {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.result-bar-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
}

.result-bar-label {
  width: 80px;
  color: var(--color-text-muted);
  flex-shrink: 0;
  font-size: 0.75rem;
}

.result-bar-track {
  flex: 1;
  height: 8px;
  background: var(--color-border);
  border-radius: 4px;
  overflow: hidden;
}

.result-bar-fill {
  height: 100%;
  border-radius: 4px;
  background: var(--color-primary);
  transition: width 1.5s ease;
}

.result-bar-fill.amber {
  background: var(--color-accent-light);
}

.result-bar-fill.full {
  background: var(--color-primary-dark);
}

.result-bar-val {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  min-width: 30px;
  text-align: right;
}

.clinical-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.clinical-table th {
  background: var(--color-surface);
  padding: 8px 12px;
  text-align: left;
  font-weight: 600;
  color: var(--color-text-muted);
  font-size: 0.75rem;
  border-bottom: 1px solid var(--color-border);
}

.clinical-table td {
  padding: 8px 12px;
  border-bottom: 1px solid rgba(209, 232, 226, 0.5);
  color: var(--color-text-main);
}

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

.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 600;
}

.badge-green {
  background: #E6F1FB;
  color: #185FA5;
}

.badge-amber {
  background: #FAEEDA;
  color: #854F0B;
}

.big-stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 3rem;
}

.big-stat {
  text-align: center;
  padding: 28px 20px;
  background: white;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.big-stat-num {
  font-family: var(--font-latin);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--color-primary);
  display: block;
  line-height: 1;
}

.big-stat-unit {
  font-size: 1rem;
}

.big-stat-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 8px;
  line-height: 1.5;
}

/* ===========================
   APPLICATIONS (Page 4)
   =========================== */

#applications {
  background: white;
  padding: 100px 20px;
}

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

.app-card {
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  background: white;
}

.app-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
}

.app-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: #E6F1FB;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 16px;
}

.app-card h3 {
  font-size: 1rem;
  margin-bottom: 10px;
  color: var(--color-text-main);
}

.app-card p {
  font-size: 0.83rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.app-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
}

.app-tag {
  background: var(--color-surface);
  color: var(--color-text-muted);
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.72rem;
  border: 1px solid var(--color-border);
}

.advantage-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 3rem;
}

.advantage-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 18px;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.advantage-icon {
  color: var(--color-primary);
  font-size: 1.2rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.advantage-item strong {
  display: block;
  font-size: 0.9rem;
  color: var(--color-text-main);
  margin-bottom: 4px;
}

.advantage-item p {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ===========================
   CTA SECTION (Page 5)
   =========================== */

#cta {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 60%, var(--color-primary-light) 100%);
  padding: 100px 20px;
  position: relative;
  overflow: hidden;
}

#cta::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.1);
  pointer-events: none;
}

#cta::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: 5%;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.08);
  pointer-events: none;
}

.cta-inner {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
}

.cta-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.15);
  color: white;
  padding: 5px 16px;
  border-radius: 20px;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  font-family: var(--font-latin);
  margin-bottom: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.cta-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  color: white;
  margin-bottom: 1.2rem;
  line-height: 1.3;
}

.cta-desc {
  color: rgba(255, 255, 255, 0.82);
  font-size: 1rem;
  margin-bottom: 2.5rem;
  line-height: 1.8;
}

.cta-buttons {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.btn-white {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: white;
  color: var(--color-primary-dark);
  padding: 14px 36px;
  border-radius: 50px;
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
  transition: all var(--transition);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.2);
  letter-spacing: 0.05em;
  cursor: pointer;
  border: none;
  font-family: var(--font-body);
}

.btn-white:hover {
  background: #f0f0f0;
  transform: translateY(-2px);
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.25);
}

.btn-outline-white {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: white;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  border: 1.5px solid rgba(255, 255, 255, 0.7);
  transition: all var(--transition);
  letter-spacing: 0.05em;
  cursor: pointer;
  font-family: var(--font-body);
}

.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-2px);
}

.cta-feature-list {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-feature {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.82rem;
}

.cta-feature-icon {
  width: 18px;
  height: 18px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: white;
  flex-shrink: 0;
}

/* ===========================
   FOOTER
   =========================== */

footer {
  background: var(--color-text-main);
  color: rgba(255, 255, 255, 0.6);
  padding: 40px 20px;
  text-align: center;
  font-size: 0.8rem;
}

footer a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
}

footer a:hover {
  color: white;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
}

.footer-logo {
  font-family: var(--font-latin);
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: 0.05em;
}

.footer-links {
  display: flex;
  gap: 24px;
}

/* ===========================
   RESPONSIVE - TABLET
   =========================== */

@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-visual {
    order: -1;
  }

  .hero-card {
    max-width: 480px;
  }


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

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

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

  .big-stat-row {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ===========================
   RESPONSIVE - MOBILE
   =========================== */

@media (max-width: 640px) {
  html {
    font-size: 15px;
  }

  section {
    padding: 60px 16px;
  }

  .hero-content {
    order: 0;
  }

  .hero-visual {
    order: 1;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 20px;
    gap: 0;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  }

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

  .nav-links li {
    border-bottom: 1px solid var(--color-border);
  }

  .nav-links a {
    display: block;
    padding: 14px 0;
    font-size: 0.95rem;
  }

  .nav-links li:last-child {
    border-bottom: none;
  }

  .nav-cta {
    display: inline-block;
    margin-top: 10px;
    text-align: center;
    border-radius: 8px !important;
    padding: 12px 0 !important;
    width: 100%;
  }

  .nav-hamburger {
    display: flex;
  }

  #hero {
    padding: 90px 16px 50px;
    min-height: auto;
  }

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

  .btn-primary, .btn-secondary {
    width: 100%;
    justify-content: center;
  }

  .hero-stats {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .advantage-row {
    grid-template-columns: 1fr;
  }

  .big-stat-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }

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

  .btn-white, .btn-outline-white {
    width: 100%;
    justify-content: center;
  }

  .ph-zone {
    flex-direction: column;
  }

  .cta-feature-list {
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

/* ===========================
   SCROLL ANIMATIONS
   =========================== */

.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }