/* HALA Framework Landing Page Styles */
/* Architectural Blueprint Aesthetic */

@import url('https://fonts.googleapis.com/css2?family=Sora:wght@300;400;500;600;700&family=Source+Sans+3:ital,wght@0,300;0,400;0,500;0,600;1,400&display=swap');

/* ===== CSS Variables ===== */
:root {
  /* Colors from logo */
  --teal-900: #134E4A;
  --teal-800: #115E59;
  --teal-700: #0F766E;
  --teal-600: #0D9488;
  --teal-500: #14B8A6;
  --teal-400: #2DD4BF;
  --teal-100: #CCFBF1;
  --teal-50: #F0FDFA;

  --gold-600: #D97706;
  --gold-500: #F59E0B;
  --gold-400: #FBBF24;
  --gold-300: #FCD34D;
  --gold-100: #FEF3C7;

  --slate-900: #0F172A;
  --slate-800: #1E293B;
  --slate-700: #334155;
  --slate-600: #475569;
  --slate-500: #64748B;
  --slate-400: #94A3B8;
  --slate-300: #CBD5E1;
  --slate-200: #E2E8F0;
  --slate-100: #F1F5F9;
  --slate-50: #F8FAFC;

  --white: #FFFFFF;
  --black: #000000;

  /* Semantic */
  --primary: var(--teal-600);
  --primary-dark: var(--teal-800);
  --primary-light: var(--teal-400);
  --accent: var(--gold-500);
  --accent-light: var(--gold-300);
  --text: var(--teal-900);
  --text-secondary: var(--slate-600);
  --bg: var(--white);
  --bg-alt: var(--slate-50);

  /* Typography */
  --font-display: 'Sora', sans-serif;
  --font-body: 'Source Sans 3', sans-serif;

  /* Spacing */
  --section-padding: clamp(4rem, 10vw, 8rem);
  --container-max: 1200px;
  --container-padding: clamp(1.5rem, 5vw, 3rem);

  /* Effects */
  --shadow-sm: 0 1px 2px rgba(19, 78, 74, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(19, 78, 74, 0.07), 0 2px 4px -2px rgba(19, 78, 74, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(19, 78, 74, 0.08), 0 4px 6px -4px rgba(19, 78, 74, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(19, 78, 74, 0.1), 0 8px 10px -6px rgba(19, 78, 74, 0.05);
  --shadow-glow: 0 0 40px rgba(13, 148, 136, 0.15);
  --shadow-gold: 0 0 30px rgba(245, 158, 11, 0.2);

  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  color: var(--text);
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

h4 {
  font-size: 1.125rem;
}

p {
  margin-bottom: 1rem;
}

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

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

/* ===== Layout ===== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

section {
  padding: var(--section-padding) 0;
  position: relative;
}

/* ===== Background Patterns ===== */
.bg-grid {
  background-image:
    linear-gradient(rgba(13, 148, 136, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(13, 148, 136, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

.bg-gradient {
  background: linear-gradient(180deg, var(--white) 0%, var(--teal-50) 100%);
}

.bg-gradient-reverse {
  background: linear-gradient(180deg, var(--teal-50) 0%, var(--white) 100%);
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 0;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(13, 148, 136, 0.1);
  transition: all var(--transition);
}

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

.header-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header-logo img {
  height: 40px;
  width: auto;
}

.header-logo span {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--teal-900);
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem;
  background: var(--slate-100);
  border-radius: 9999px;
}

.lang-switch a {
  display: block;
  padding: 0.5rem 1rem;
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 9999px;
  transition: all var(--transition);
}

.lang-switch a:hover {
  color: var(--text);
}

.lang-switch a.active {
  background: var(--white);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

/* ===== Hero ===== */
.hero {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 8rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(13, 148, 136, 0.08) 0%, transparent 70%),
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(245, 158, 11, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-logo {
  width: clamp(180px, 25vw, 280px);
  height: auto;
  margin-bottom: 2rem;
  animation: float 6s ease-in-out infinite;
  filter: drop-shadow(0 20px 40px rgba(13, 148, 136, 0.2));
}

.hero-image {
  width: 100%;
  max-width: 1000px;
  height: auto;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

/* ===== Framework Visual Section ===== */
.framework-visual {
  padding: 0 0 var(--section-padding);
  text-align: center;
}

.framework-visual .container {
  display: flex;
  justify-content: center;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}

.hero-title {
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--teal-800) 0%, var(--teal-600) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-acronym {
  display: block;
  font-size: 0.4em;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-secondary);
  -webkit-text-fill-color: var(--text-secondary);
  margin-top: 0.5rem;
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  color: var(--text-secondary);
  max-width: 700px;
  margin: 1.5rem auto 0;
  font-weight: 400;
}

.hero-meta {
  font-size: 1rem;
  color: var(--slate-500);
  margin-top: 1rem;
  font-style: italic;
}

/* ===== Content Blocks ===== */
.content-block {
  max-width: 800px;
  margin: 0 auto 2rem;
}

.content-block p {
  font-size: 1.125rem;
  line-height: 1.8;
}

.styled-list {
  list-style: none;
  margin: 1.5rem 0;
  padding-left: 0;
}

.styled-list li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
}

.styled-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: bold;
}

/* ===== Section Dark ===== */
.section-dark {
  background: var(--slate-50);
  padding: var(--section-padding) 0;
}

/* ===== Section Highlight ===== */
.section-highlight {
  background: linear-gradient(135deg, var(--teal-50) 0%, var(--white) 100%);
  padding: var(--section-padding) 0;
}

/* ===== Context Grid ===== */
.context-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.context-card {
  background: var(--white);
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--teal-200);
  transition: all var(--transition);
}

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

.context-card h4 {
  color: var(--primary-dark);
  margin-bottom: 0.5rem;
}

.context-card p {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 0;
}

/* ===== Stat Quote ===== */
.stat-quote {
  background: var(--white);
  border-left: 4px solid var(--gold-500);
  padding: 1.5rem 2rem;
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  margin: 2rem auto;
  max-width: 800px;
  box-shadow: var(--shadow-md);
}

.stat-quote p {
  margin-bottom: 0;
  font-size: 1.0625rem;
  line-height: 1.7;
}

/* ===== Theory Grid ===== */
.theory-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.theory-card {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--slate-200);
  transition: all var(--transition);
}

.theory-card:hover {
  box-shadow: var(--shadow-lg);
}

.theory-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--teal-100);
  color: var(--teal-700);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 9999px;
  margin-bottom: 1rem;
}

.theory-card h3 {
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

.theory-card ul {
  list-style: none;
  padding: 0;
  margin-bottom: 1rem;
}

.theory-card li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--slate-100);
  font-size: 0.9375rem;
}

.theory-card li:last-child {
  border-bottom: none;
}

.theory-contribution {
  color: var(--primary);
  font-size: 0.9375rem;
  margin-bottom: 0;
}

/* ===== Principles Section ===== */
.principles-section {
  margin-top: 3rem;
}

.principles-section h3 {
  text-align: center;
  margin-bottom: 2rem;
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.principle-card {
  background: var(--white);
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--slate-200);
  position: relative;
}

.principle-number {
  position: absolute;
  top: -0.75rem;
  left: 1rem;
  width: 2rem;
  height: 2rem;
  background: linear-gradient(135deg, var(--teal-500), var(--teal-600));
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.875rem;
}

.principle-card h4 {
  margin-bottom: 0.75rem;
  padding-top: 0.5rem;
}

.principle-card p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: 0;
  line-height: 1.6;
}

/* ===== Ecosystem Detail ===== */
.ecosystem-detail {
  background: var(--white);
  padding: var(--section-padding) 0;
}

.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.ecosystem-card {
  background: var(--slate-50);
  padding: 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--slate-200);
}

.ecosystem-card h3 {
  color: var(--primary-dark);
  font-size: 1.125rem;
  margin-bottom: 0.75rem;
}

.ecosystem-card > p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: 1rem;
}

.ecosystem-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.ecosystem-card li {
  padding: 0.375rem 0 0.375rem 1.25rem;
  position: relative;
  font-size: 0.9375rem;
  color: var(--text);
}

.ecosystem-card li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--primary);
}

.outcome-box {
  background: linear-gradient(135deg, var(--teal-600) 0%, var(--teal-700) 100%);
  color: var(--white);
  padding: 2rem;
  border-radius: var(--radius-xl);
  max-width: 700px;
  margin: 0 auto;
}

.outcome-box h4 {
  color: var(--gold-300);
  margin-bottom: 1rem;
}

.outcome-box ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.outcome-box li {
  padding: 0.5rem 0 0.5rem 1.5rem;
  position: relative;
}

.outcome-box li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--gold-400);
}

/* ===== Trust Economics ===== */
.trust-economics {
  margin-top: 3rem;
  text-align: center;
  background: rgba(255, 255, 255, 0.05);
  padding: 2rem;
  border-radius: var(--radius-xl);
}

.trust-economics h4 {
  color: var(--gold-400);
  margin-bottom: 1.5rem;
}

.trust-flow {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  font-family: var(--font-display);
  font-size: 0.9375rem;
}

.trust-flow span {
  background: rgba(255, 255, 255, 0.1);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
}

.trust-economics p {
  color: var(--teal-200);
  margin-bottom: 0;
}

/* ===== Integration Section ===== */
.integration-section {
  background: var(--slate-50);
  padding: var(--section-padding) 0;
}

.integration-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.integration-block {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--radius-xl);
  border: 1px solid var(--slate-200);
}

.integration-block h3 {
  margin-bottom: 1.5rem;
  font-size: 1.25rem;
}

.vertical-stack {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.stack-item {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-family: var(--font-display);
}

.stack-1 { background: var(--slate-200); }
.stack-2 { background: var(--slate-300); }
.stack-3 { background: var(--teal-200); }
.stack-4 { background: var(--teal-300); }
.stack-5 { background: var(--teal-400); color: var(--white); }
.stack-6 { background: var(--gold-300); }
.stack-7 { background: var(--gold-400); }

.integration-note {
  margin-top: 1.5rem;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  font-style: italic;
}

.integration-table {
  width: 100%;
  border-collapse: collapse;
}

.integration-table td {
  padding: 0.75rem;
  border-bottom: 1px solid var(--slate-200);
  font-size: 0.9375rem;
}

.integration-table td:first-child {
  font-weight: 600;
  color: var(--primary-dark);
  width: 30%;
}

.trust-cycle {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--radius-xl);
  border: 1px solid var(--slate-200);
}

.trust-cycle h3 {
  text-align: center;
  margin-bottom: 2rem;
}

.cycle-diagram {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.cycle-step {
  background: linear-gradient(135deg, var(--teal-100) 0%, var(--teal-50) 100%);
  padding: 1rem 1.5rem;
  border-radius: var(--radius-lg);
  text-align: center;
  font-size: 0.9375rem;
  border: 1px solid var(--teal-200);
}

.cycle-step small {
  display: block;
  color: var(--text-secondary);
  font-size: 0.8125rem;
}

.cycle-arrow {
  color: var(--primary);
  font-size: 1.5rem;
  font-weight: bold;
}

.cycle-note {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9375rem;
  max-width: 700px;
  margin: 0 auto;
}

/* ===== Anti-patterns Section ===== */
.antipatterns-section {
  background: var(--white);
  padding: var(--section-padding) 0;
}

.antipatterns-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.antipattern-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--slate-200);
}

.antipattern-wrong {
  background: #FEF2F2;
  padding: 1.25rem;
  border-bottom: 1px solid var(--slate-200);
}

.antipattern-wrong .label {
  display: inline-block;
  background: #FCA5A5;
  color: #7F1D1D;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  padding: 0.125rem 0.5rem;
  border-radius: 9999px;
  margin-bottom: 0.5rem;
}

.antipattern-wrong h4 {
  color: #991B1B;
  margin-bottom: 0.25rem;
  font-size: 1rem;
}

.antipattern-wrong p {
  color: #7F1D1D;
  font-size: 0.875rem;
  margin-bottom: 0;
  font-style: italic;
}

.antipattern-right {
  background: #F0FDF4;
  padding: 1.25rem;
}

.antipattern-right .label {
  display: inline-block;
  background: #86EFAC;
  color: #14532D;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  padding: 0.125rem 0.5rem;
  border-radius: 9999px;
  margin-bottom: 0.5rem;
}

.antipattern-right p {
  color: #166534;
  font-size: 0.9375rem;
  margin-bottom: 0;
}

.red-line-quote {
  background: linear-gradient(135deg, var(--slate-800) 0%, var(--slate-900) 100%);
  color: var(--white);
  padding: 2rem;
  border-radius: var(--radius-xl);
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.red-line-quote p:first-child {
  margin-bottom: 1rem;
}

.red-line-quote p:last-child {
  margin-bottom: 0;
  color: var(--slate-400);
}

.legitimate {
  color: #86EFAC;
}

.illegitimate {
  color: #FCA5A5;
}

/* ===== Metrics Section ===== */
.metrics-section {
  background: var(--slate-50);
  padding: var(--section-padding) 0;
}

.metrics-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 2rem;
}

.metrics-block {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--radius-xl);
  border: 1px solid var(--slate-200);
}

.metrics-block h3 {
  margin-bottom: 1.5rem;
}

.metrics-table {
  width: 100%;
  border-collapse: collapse;
}

.metrics-table td {
  padding: 0.75rem;
  border-bottom: 1px solid var(--slate-200);
  font-size: 0.9375rem;
}

.metrics-table td:first-child {
  width: 30%;
}

.horizons {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.horizon {
  background: var(--slate-50);
  padding: 1.25rem;
  border-radius: var(--radius-lg);
  border-left: 3px solid var(--primary);
}

.horizon-time {
  display: inline-block;
  background: var(--teal-100);
  color: var(--teal-700);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.125rem 0.5rem;
  border-radius: 9999px;
  margin-bottom: 0.5rem;
}

.horizon h4 {
  margin-bottom: 0.25rem;
  font-size: 1rem;
}

.horizon p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 0;
}

/* ===== Limitations Block ===== */
.limitations-block {
  margin-top: 3rem;
  background: var(--white);
  padding: 2rem;
  border-radius: var(--radius-xl);
  border: 1px solid var(--slate-200);
}

.limitations-block h3 {
  margin-bottom: 1rem;
}

.limitations-block ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.limitations-block li {
  padding: 0.5rem 0 0.5rem 1.5rem;
  position: relative;
  color: var(--text-secondary);
}

.limitations-block li::before {
  content: '⚠';
  position: absolute;
  left: 0;
  color: var(--gold-500);
}

/* ===== Conclusion Section ===== */
.conclusion-section {
  background: linear-gradient(135deg, var(--teal-800) 0%, var(--teal-900) 100%);
  color: var(--white);
  padding: var(--section-padding) 0;
}

.conclusion-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.conclusion-content h2 {
  color: var(--white);
  margin-bottom: 2rem;
}

.conclusion-content p {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--teal-100);
  margin-bottom: 1.5rem;
}

.conclusion-highlight {
  background: rgba(255, 255, 255, 0.1);
  padding: 2rem 2.5rem;
  border-radius: var(--radius-lg);
  color: var(--white) !important;
  font-size: 1.25rem;
  line-height: 1.7;
}

/* ===== Responsive additions ===== */
@media (max-width: 768px) {
  .integration-content {
    grid-template-columns: 1fr;
  }

  .metrics-content {
    grid-template-columns: 1fr;
  }

  .cycle-diagram {
    flex-direction: column;
  }

  .cycle-arrow {
    transform: rotate(90deg);
  }
}

.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
  animation: bounce 2s infinite;
}

.hero-scroll svg {
  width: 24px;
  height: 24px;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ===== Section Headers ===== */
.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 4rem;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--primary);
  margin-bottom: 1rem;
}

.section-label::before,
.section-label::after {
  content: '';
  width: 2rem;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary));
}

.section-label::after {
  background: linear-gradient(90deg, var(--primary), transparent);
}

.section-header h2 {
  margin-bottom: 1rem;
}

.section-header p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* Extended Section Header */
.section-header--extended {
  margin-bottom: 3rem;
}

.section-lead {
  font-size: 1.25rem;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 1.5rem auto 0;
  text-align: center;
}

.section-lead strong {
  color: var(--primary);
  font-weight: 600;
}

/* ===== Problems Section ===== */
.problems {
  background: var(--bg-alt);
}

.problems-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.problem-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 2rem;
  border: 1px solid var(--slate-200);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.problem-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--teal-600), var(--gold-500));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

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

.problem-card:hover::before {
  transform: scaleX(1);
}

.problem-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--teal-100) 0%, var(--teal-50) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--primary);
}

.problem-icon svg {
  width: 24px;
  height: 24px;
}

.problem-card h3 {
  color: var(--text);
  margin-bottom: 0.5rem;
}

.problem-card p {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 0;
  line-height: 1.6;
}

/* ===== Layers Section ===== */
.layers-section {
  position: relative;
}

.layers-visual {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  max-width: 900px;
  margin: 0 auto;
  position: relative;
}

.layer-group {
  margin-bottom: 3rem;
}

.layer-group:last-child {
  margin-bottom: 0;
}

.layer-group-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.layer-group-badge {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--white);
}

.layer-group--a .layer-group-badge {
  background: linear-gradient(135deg, var(--slate-600), var(--slate-700));
}

.layer-group--b .layer-group-badge {
  background: linear-gradient(135deg, var(--teal-500), var(--teal-600));
}

.layer-group--c .layer-group-badge {
  background: linear-gradient(135deg, var(--gold-400), var(--gold-500));
}

.layer-group-title {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

.layer-group-subtitle {
  font-size: 0.875rem;
  color: var(--slate-500);
  font-weight: 400;
}

.layers-stack {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.layer-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.5rem;
  padding: 1.5rem 2rem;
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--slate-200);
  transition: all var(--transition);
  position: relative;
}

.layer-card:hover {
  transform: translateX(8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.layer-number {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.layer-group--a .layer-number {
  background: var(--slate-100);
  color: var(--slate-700);
}

.layer-group--b .layer-number {
  background: var(--teal-100);
  color: var(--teal-700);
}

.layer-group--c .layer-number {
  background: var(--gold-100);
  color: var(--gold-600);
}

.layer-content h4 {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.25rem;
}

.layer-metaphor {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.5rem;
  border-radius: 9999px;
  background: var(--slate-100);
  color: var(--slate-600);
}

.layer-content p {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 0;
  line-height: 1.6;
}

/* ===== Trust Section ===== */
.trust-section {
  background: linear-gradient(180deg, var(--teal-900) 0%, var(--teal-800) 100%);
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.trust-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse 100% 80% at 20% 120%, rgba(245, 158, 11, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse 60% 50% at 80% -20%, rgba(45, 212, 191, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.trust-section .section-header {
  position: relative;
  z-index: 1;
}

.trust-section .section-label {
  color: var(--gold-400);
}

.trust-section .section-label::before,
.trust-section .section-label::after {
  background: linear-gradient(90deg, transparent, var(--gold-400));
}

.trust-section .section-label::after {
  background: linear-gradient(90deg, var(--gold-400), transparent);
}

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

.trust-section .section-header p {
  color: var(--teal-200);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1rem;
  position: relative;
  z-index: 1;
}

.trust-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  backdrop-filter: blur(10px);
  transition: all var(--transition);
}

.trust-card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(245, 158, 11, 0.3);
  transform: translateY(-4px);
}

.trust-card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.trust-number {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold-400), var(--gold-500));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--teal-900);
  flex-shrink: 0;
}

.trust-card h4 {
  color: var(--white);
  font-size: 1.125rem;
}

.trust-card p {
  color: var(--teal-200);
  font-size: 0.9375rem;
  margin-bottom: 1rem;
  line-height: 1.6;
}

.trust-broken {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--gold-300);
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.trust-broken svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* ===== Comparison Section ===== */
.comparison-section {
  background: var(--bg-alt);
}

.comparison-table {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.comparison-col {
  padding: 2.5rem;
}

.comparison-col--old {
  background: var(--white);
  border-right: 1px solid var(--slate-200);
}

.comparison-col--new {
  background: linear-gradient(135deg, var(--teal-600) 0%, var(--teal-700) 100%);
  color: var(--white);
}

.comparison-header {
  text-align: center;
  padding-bottom: 2rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.comparison-col--new .comparison-header {
  border-bottom-color: rgba(255, 255, 255, 0.2);
}

.comparison-header h3 {
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
}

.comparison-col--new .comparison-header h3 {
  color: var(--white);
}

.comparison-header span {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.comparison-col--new .comparison-header span {
  color: var(--teal-200);
}

.comparison-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.comparison-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
}

.comparison-item-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.comparison-col--old .comparison-item-icon {
  background: var(--slate-100);
  color: var(--slate-500);
}

.comparison-col--new .comparison-item-icon {
  background: rgba(255, 255, 255, 0.15);
  color: var(--gold-300);
}

.comparison-item-icon svg {
  width: 16px;
  height: 16px;
}

.comparison-item strong {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 0.25rem;
}

.comparison-col--old .comparison-item strong {
  color: var(--text-secondary);
}

.comparison-col--new .comparison-item strong {
  color: var(--teal-200);
}

.comparison-item span {
  font-size: 1rem;
  line-height: 1.5;
}

.comparison-col--old .comparison-item span {
  color: var(--text);
}

.comparison-col--new .comparison-item span {
  color: var(--white);
}

/* ===== Applications Section ===== */
.applications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.application-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 2rem;
  border: 1px solid var(--slate-200);
  text-align: center;
  transition: all var(--transition);
  position: relative;
}

.application-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.application-card::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--teal-500), var(--gold-400));
  z-index: -1;
  opacity: 0;
  transition: opacity var(--transition);
}

.application-card:hover::after {
  opacity: 1;
}

.application-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--teal-50) 0%, var(--teal-100) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  color: var(--primary);
  transition: all var(--transition);
}

.application-card:hover .application-icon {
  background: linear-gradient(135deg, var(--teal-100) 0%, var(--teal-200) 100%);
  transform: scale(1.1);
}

.application-icon svg {
  width: 32px;
  height: 32px;
}

.application-card h3 {
  margin-bottom: 0.75rem;
}

.application-card p {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 0;
  line-height: 1.6;
}

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

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.footer-logo img {
  height: 32px;
  width: auto;
  opacity: 0.9;
}

.footer-logo span {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--white);
}

.footer p {
  font-size: 0.9375rem;
  margin-bottom: 0;
}

.footer-author {
  color: var(--slate-400);
}

.footer-note {
  color: var(--slate-500);
  font-size: 0.875rem !important;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .header-logo span {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 8rem 0 4rem;
  }

  .hero-scroll {
    display: none;
  }

  .layer-card {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .layer-number {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }

  .comparison-table {
    grid-template-columns: 1fr;
  }

  .comparison-col--old {
    border-right: none;
    border-bottom: 1px solid var(--slate-200);
  }

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

/* ===== Animations ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.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; }
.animate-delay-5 { animation-delay: 0.5s; }

/* Scroll animations - will be triggered by JS */
[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

[data-animate].visible {
  opacity: 1;
  transform: translateY(0);
}