/* AURA EVO Landing Page */
/* Apple-style: minimal, generous whitespace, refined typography */

:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --text: #1d1d1f;
  --text-secondary: #86868b;
  --border: #d2d2d7;
  --primary: #0071e3;
  --primary-hover: #0077ed;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.1);
  --max-width: 1200px;
  --transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250,250,250,0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0,0,0,0.05);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.nav-logo-ring {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  position: relative;
}

.nav-logo-ring::after {
  content: '';
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  background: var(--bg);
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
}

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

.nav-cta {
  padding: 8px 18px;
  background: var(--primary);
  color: white;
  text-decoration: none;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition);
}

.nav-cta:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

/* Hero */
.hero {
  padding: 140px 40px 80px;
  text-align: center;
}

.hero-inner {
  max-width: 800px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(0,113,227,0.08);
  color: var(--primary);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 64px;
  font-weight: 800;
  letter-spacing: -2px;
  line-height: 1.1;
  margin-bottom: 24px;
}

.hero-gradient {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 20px;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 40px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 80px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-family: inherit;
}

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

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

.btn--ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn--ghost:hover {
  background: var(--surface);
  border-color: var(--text-secondary);
}

/* Hero Visual - AURA Orb */
.hero-visual {
  display: flex;
  justify-content: center;
  padding: 40px 0;
}

.aura-orb {
  position: relative;
  width: 280px;
  height: 280px;
}

.aura-orb-core {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, #667eea, #764ba2);
  box-shadow: 0 0 60px rgba(102,126,234,0.4);
}

.aura-orb-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 1px solid transparent;
}

.aura-orb-ring--1 {
  width: 120px;
  height: 120px;
  border-color: rgba(102,126,234,0.2);
  animation: auraPulse 3s ease-in-out infinite;
}

.aura-orb-ring--2 {
  width: 180px;
  height: 180px;
  border-color: rgba(118,75,162,0.15);
  animation: auraPulse 3s ease-in-out infinite 0.5s;
}

.aura-orb-ring--3 {
  width: 240px;
  height: 240px;
  border-color: rgba(240,147,251,0.1);
  animation: auraPulse 3s ease-in-out infinite 1s;
}

@keyframes auraPulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
  50% { transform: translate(-50%, -50%) scale(1.05); opacity: 0.7; }
}

/* Sections */
.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 100px 40px;
}

.section-title {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -1px;
  text-align: center;
  margin-bottom: 60px;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 18px;
  margin-top: -40px;
  margin-bottom: 60px;
}

/* Features */
.features {
  background: var(--surface);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  padding: 40px 32px;
  border-radius: var(--radius);
  background: var(--bg);
  transition: var(--transition);
}

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

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
}

.feature-icon--self {
  background: linear-gradient(135deg, #667eea, #764ba2);
}

.feature-icon--market {
  background: linear-gradient(135deg, #f093fb, #f5576c);
}

.feature-icon--eco {
  background: linear-gradient(135deg, #4facfe, #00f2fe);
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.6;
}

/* Experts */
.experts-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.expert-preview {
  text-align: center;
  padding: 32px 24px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.expert-preview:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}

.expert-preview-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  color: white;
  margin: 0 auto 16px;
}

.expert-preview h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.expert-preview p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Roadmap */
.roadmap {
  background: var(--surface);
}

.roadmap-list {
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.roadmap-item {
  padding: 32px;
  border-radius: var(--radius);
  background: var(--bg);
  border-left: 3px solid var(--border);
  transition: var(--transition);
}

.roadmap-item--current {
  border-left-color: var(--primary);
  background: rgba(0,113,227,0.03);
}

.roadmap-phase {
  display: inline-block;
  padding: 4px 12px;
  background: var(--surface);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.roadmap-item--current .roadmap-phase {
  background: var(--primary);
  color: white;
}

.roadmap-item h4 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
}

.roadmap-item p {
  color: var(--text-secondary);
  font-size: 15px;
}

/* Footer */
.footer {
  background: var(--text);
  color: white;
  padding: 60px 40px 24px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 48px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
}

.footer-logo-ring {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, #667eea, #764ba2);
  position: relative;
}

.footer-logo-ring::after {
  content: '';
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  background: var(--text);
}

.footer-brand p {
  color: rgba(255,255,255,0.6);
  font-size: 14px;
}

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

.footer-links a {
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  font-size: 14px;
  transition: var(--transition);
}

.footer-links a:hover {
  color: white;
}

.footer-copy {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.4);
  font-size: 13px;
}

/* Responsive */
@media (max-width: 900px) {
  .features-grid { grid-template-columns: 1fr; }
  .experts-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-title { font-size: 40px; }
  .nav-links { display: none; }
}

@media (max-width: 600px) {
  .experts-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 32px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .section-inner { padding: 60px 20px; }
}