/* ============================================
   GhostPay Mesh — Landing Page Styles
   ============================================ */

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #0f0f18;
  --bg-card: #12121c;
  --bg-card-hover: #181828;
  --accent: #00d4aa;
  --accent-dim: rgba(0, 212, 170, 0.15);
  --accent-glow: rgba(0, 212, 170, 0.3);
  --text-primary: #f0f0f5;
  --text-secondary: #9898a8;
  --text-muted: #5a5a6e;
  --border: rgba(255, 255, 255, 0.06);
  --border-accent: rgba(0, 212, 170, 0.2);
  --gradient-hero: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(0, 212, 170, 0.08) 0%, transparent 60%),
                   radial-gradient(ellipse 50% 40% at 80% 20%, rgba(90, 50, 180, 0.06) 0%, transparent 50%);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --max-width: 1200px;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---- Typography ---- */

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem); }
h2 { font-size: clamp(1.8rem, 3vw + 0.5rem, 3rem); }
h3 { font-size: clamp(1.1rem, 1.5vw + 0.3rem, 1.4rem); }

p {
  color: var(--text-secondary);
  font-size: clamp(1rem, 1.2vw, 1.125rem);
  max-width: 640px;
}

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

a:hover { opacity: 0.8; }

/* ---- Layout ---- */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 120px 0;
  position: relative;
}

@media (max-width: 768px) {
  section { padding: 80px 0; }
}

/* ---- Navigation ---- */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 24px;
  transition: background var(--transition), box-shadow var(--transition);
}

.nav.scrolled {
  background: rgba(10, 10, 15, 0.85);
  -webkit-backdrop-filter: blur(20px) saturate(1.2);
  backdrop-filter: blur(20px) saturate(1.2);
  box-shadow: 0 1px 0 var(--border);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.nav-logo .logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent) 0%, #00a88a 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color var(--transition);
}

.nav-links a:hover {
  color: var(--text-primary);
  opacity: 1;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang-picker {
  display: flex;
  gap: 2px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px;
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-family: var(--font-sans);
  cursor: pointer;
  font-weight: 600;
  transition: all var(--transition);
  letter-spacing: 0.02em;
}

.lang-btn:hover {
  color: var(--text-primary);
}

.lang-btn.active {
  background: var(--accent);
  color: var(--bg-primary);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 4px;
}

.mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  margin: 5px 0;
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.mobile-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.mobile-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 768px) {
  .mobile-toggle { display: block; }

  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 10, 15, 0.98);
    -webkit-backdrop-filter: blur(24px);
    backdrop-filter: blur(24px);
    flex-direction: column;
    justify-content: flex-start;
    padding: 40px 24px;
    gap: 24px;
    transform: translateX(100%);
    transition: transform var(--transition);
  }

  .nav-links.open {
    transform: translateX(0);
  }

  .nav-links a {
    font-size: 1.2rem;
  }
}

/* ---- Buttons ---- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg-primary);
  box-shadow: 0 0 20px rgba(0, 212, 170, 0.2);
}

.btn-primary:hover {
  opacity: 1;
  box-shadow: 0 0 40px rgba(0, 212, 170, 0.35);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  opacity: 1;
  border-color: var(--text-muted);
  background: rgba(255, 255, 255, 0.03);
}

.btn-ghost {
  background: transparent;
  color: var(--accent);
  padding: 14px 0;
}

.btn-ghost:hover {
  opacity: 0.8;
}

.btn-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---- Hero ---- */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 72px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 200px;
  background: linear-gradient(to top, var(--bg-primary), transparent);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 780px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 32px;
  letter-spacing: 0.02em;
}

.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero h1 {
  margin-bottom: 24px;
}

.hero h1 .accent {
  background: linear-gradient(135deg, var(--accent) 0%, #4dffdb 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
  line-height: 1.7;
  margin-bottom: 48px;
  max-width: 600px;
}

.hero-visual {
  position: absolute;
  right: -5%;
  top: 50%;
  transform: translateY(-50%);
  width: 500px;
  height: 500px;
  opacity: 0.5;
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 50% 50% at 50% 50%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 50% 50% at 50% 50%, black 20%, transparent 70%);
  pointer-events: none;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  animation: float 20s ease-in-out infinite;
}

.orb-1 {
  width: 400px;
  height: 400px;
  background: rgba(0, 212, 170, 0.06);
  top: 20%;
  right: 10%;
}

.orb-2 {
  width: 300px;
  height: 300px;
  background: rgba(90, 50, 180, 0.05);
  bottom: 10%;
  left: 20%;
  animation-delay: -8s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  33% { transform: translate(20px, -20px); }
  66% { transform: translate(-15px, 15px); }
}

/* ---- Section Headers ---- */

.section-header {
  margin-bottom: 64px;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 16px;
}

.section-header h2 {
  margin-bottom: 16px;
}

.section-header p {
  max-width: 560px;
}

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

.section-header.center p {
  margin-left: auto;
  margin-right: auto;
}

/* ---- Stats ---- */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.stat-card {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition);
}

.stat-card:hover {
  border-color: var(--border-accent);
}

.stat-number {
  font-size: clamp(2rem, 3vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--text-primary) 40%, var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

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

/* ---- Steps (How it Works) ---- */

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

.step-card {
  padding: 40px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
  transition: border-color var(--transition), transform var(--transition);
}

.step-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
}

.step-number {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 20px;
}

.step-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  font-size: 1.3rem;
}

.step-card h3 {
  margin-bottom: 12px;
  color: var(--text-primary);
}

.step-card p {
  font-size: 0.95rem;
  line-height: 1.6;
}

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

/* ---- Security ---- */

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

.security-item {
  display: flex;
  gap: 16px;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition);
}

.security-item:hover {
  border-color: var(--border-accent);
}

.security-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.security-item h3 {
  font-size: 1rem;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: 0;
}

.security-item p {
  font-size: 0.875rem;
  line-height: 1.5;
}

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

/* ---- Use Cases ---- */

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

.usecase-card {
  padding: 32px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  transition: border-color var(--transition), transform var(--transition);
}

.usecase-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
}

.usecase-icon {
  font-size: 2rem;
  margin-bottom: 20px;
  display: block;
}

.usecase-card h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.usecase-card p {
  font-size: 0.85rem;
  margin: 0 auto;
}

@media (max-width: 960px) {
  .usecases-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 520px) {
  .usecases-grid { grid-template-columns: 1fr; }
}

/* ---- Developer ---- */

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

.dev-card {
  padding: 28px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition);
}

.dev-card:hover {
  border-color: var(--border-accent);
}

.dev-card h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.dev-card p {
  font-size: 0.85rem;
  line-height: 1.5;
}

.code-preview {
  margin-top: 48px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.code-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 20px;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--border);
}

.code-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.code-dot:nth-child(1) { background: #ff5f56; }
.code-dot:nth-child(2) { background: #ffbd2e; }
.code-dot:nth-child(3) { background: #27c93f; }

.code-body {
  padding: 24px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--text-secondary);
  overflow-x: auto;
}

.code-body .kw { color: #c792ea; }
.code-body .fn { color: #82aaff; }
.code-body .str { color: var(--accent); }
.code-body .cm { color: var(--text-muted); }

@media (max-width: 960px) {
  .dev-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 520px) {
  .dev-grid { grid-template-columns: 1fr; }
}

/* ---- Roadmap ---- */

.roadmap-track {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.roadmap-track::before {
  content: '';
  position: absolute;
  top: 32px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--border);
}

.roadmap-item {
  position: relative;
  padding-top: 48px;
}

.roadmap-dot {
  position: absolute;
  top: 24px;
  left: 0;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--bg-primary);
  z-index: 1;
}

.roadmap-item.done .roadmap-dot {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 12px rgba(0, 212, 170, 0.4);
}

.roadmap-item.active .roadmap-dot {
  border-color: var(--accent);
  animation: pulse-ring 2s ease-in-out infinite;
}

@keyframes pulse-ring {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0, 212, 170, 0.3); }
  50% { box-shadow: 0 0 0 8px rgba(0, 212, 170, 0); }
}

.roadmap-phase {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.roadmap-item.done .roadmap-phase,
.roadmap-item.active .roadmap-phase {
  color: var(--accent);
}

.roadmap-item h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.roadmap-status {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.roadmap-item.done .roadmap-status { color: var(--accent); }
.roadmap-item.active .roadmap-status { color: #ffbd2e; }

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

  .roadmap-track::before {
    top: 0;
    bottom: 0;
    left: 8px;
    right: auto;
    width: 2px;
    height: auto;
  }

  .roadmap-item {
    padding-top: 0;
    padding-left: 40px;
  }

  .roadmap-dot {
    top: 2px;
    left: 0;
  }
}

/* ---- Trust ---- */

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

.trust-card {
  padding: 28px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition);
}

.trust-card:hover {
  border-color: var(--border-accent);
}

.trust-icon {
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.trust-card h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.trust-card p {
  font-size: 0.85rem;
  line-height: 1.5;
}

@media (max-width: 960px) {
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 520px) {
  .trust-grid { grid-template-columns: 1fr; }
}

/* ---- CTA Banner ---- */

.cta-section {
  text-align: center;
  padding: 120px 0;
}

.cta-section h2 {
  margin-bottom: 16px;
}

.cta-section p {
  margin: 0 auto 40px;
}

/* ---- Footer ---- */

.footer {
  border-top: 1px solid var(--border);
  padding: 48px 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
}

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

.footer-links a {
  color: var(--text-muted);
  font-size: 0.85rem;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--text-primary);
  opacity: 1;
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.8rem;
}

@media (max-width: 640px) {
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

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

/* ---- Scroll Animations ---- */

.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

/* ---- Divider ---- */

.section-divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}