/* =========================================
   Kappaji.com — OrthoScribe Landing Page
   Theme: Dark premium + Sky Blue accent
   ========================================= */

@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap");

/* ── CSS Custom Properties ── */
:root {
  --primary: #0ea5e9;
  --primary-dark: #0284c7;
  --primary-light: #38bdf8;
  --accent-gradient: linear-gradient(135deg, #0ea5e9, #3b82f6, #6366f1);
  --bg-dark: #030712;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-glow: rgba(14, 165, 233, 0.3);
  --glow-primary: 0 0 60px rgba(14, 165, 233, 0.15);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

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

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

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

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

/* ── Utility ── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

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

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--primary);
  margin-bottom: 16px;
}

.section-label::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.8;
}

.text-gradient {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Fade-in Animation ── */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 0.8s ease,
    transform 0.8s 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;
}
.fade-in-delay-5 {
  transition-delay: 0.5s;
}

/* ── Navbar ── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(3, 7, 18, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 12px 0;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 700;
}

.nav-logo {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  color: white;
  box-shadow: 0 0 20px rgba(14, 165, 233, 0.3);
}

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

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
}

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

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition);
}

.nav-links a:hover::after {
  width: 100%;
}

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

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

.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: 0 4px 20px rgba(14, 165, 233, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(14, 165, 233, 0.4);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1rem;
  border-radius: var(--radius);
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.85rem;
}

/* ── Hero Section ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(
    circle,
    rgba(14, 165, 233, 0.08) 0%,
    transparent 70%
  );
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -30%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(
    circle,
    rgba(99, 102, 241, 0.06) 0%,
    transparent 70%
  );
  border-radius: 50%;
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(
    ellipse at center,
    black 30%,
    transparent 80%
  );
}

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

.hero-content {
  text-align: center;
  max-width: 850px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(14, 165, 233, 0.1);
  border: 1px solid rgba(14, 165, 233, 0.2);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary-light);
  margin-bottom: 32px;
}

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

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    box-shadow: 0 0 0 0 rgba(14, 165, 233, 0.4);
  }
  50% {
    opacity: 0.8;
    box-shadow: 0 0 0 8px rgba(14, 165, 233, 0);
  }
}

.hero-title {
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto 40px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 60px;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  padding-top: 48px;
  border-top: 1px solid var(--border-subtle);
}

.stat {
  text-align: center;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ── Features Section ── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 60px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity var(--transition);
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: var(--glow-primary);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.5rem;
}

.feature-icon.blue {
  background: rgba(14, 165, 233, 0.1);
  color: #0ea5e9;
}
.feature-icon.green {
  background: rgba(34, 197, 94, 0.1);
  color: #22c55e;
}
.feature-icon.purple {
  background: rgba(168, 85, 247, 0.1);
  color: #a855f7;
}
.feature-icon.orange {
  background: rgba(249, 115, 22, 0.1);
  color: #f97316;
}
.feature-icon.pink {
  background: rgba(236, 72, 153, 0.1);
  color: #ec4899;
}
.feature-icon.cyan {
  background: rgba(6, 182, 212, 0.1);
  color: #06b6d4;
}

.feature-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ── How It Works ── */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 60px;
  position: relative;
}

.steps-grid::before {
  content: "";
  position: absolute;
  top: 52px;
  left: calc(33.33% - 16px);
  right: calc(33.33% - 16px);
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--primary),
    var(--border-subtle),
    var(--primary)
  );
}

.step-card {
  text-align: center;
  position: relative;
}

.step-number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--bg-dark);
  border: 2px solid var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--primary);
  margin: 0 auto 24px;
  position: relative;
  z-index: 2;
  box-shadow: 0 0 30px rgba(14, 165, 233, 0.15);
}

.step-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.step-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.step-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ── Tech Stack ── */
.tech-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  margin-top: 60px;
}

.tech-badge {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  transition: all var(--transition);
  font-weight: 600;
  font-size: 0.95rem;
}

.tech-badge:hover {
  border-color: var(--border-glow);
  transform: translateY(-2px);
  box-shadow: var(--glow-primary);
}

.tech-badge .tech-icon {
  font-size: 1.5rem;
}

/* ── Social Proof / Testimonial ── */
.proof-section {
  text-align: center;
}

.proof-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 60px;
}

.proof-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: left;
}

.proof-quote {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
  font-style: italic;
}

.proof-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.proof-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  color: white;
}

.proof-name {
  font-weight: 600;
  font-size: 0.9rem;
}

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

/* ── CTA Banner ── */
.cta-section {
  text-align: center;
  padding: 100px 0;
}

.cta-box {
  background: linear-gradient(
    135deg,
    rgba(14, 165, 233, 0.1),
    rgba(99, 102, 241, 0.1)
  );
  border: 1px solid rgba(14, 165, 233, 0.15);
  border-radius: 24px;
  padding: 80px 40px;
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(
    circle,
    rgba(14, 165, 233, 0.1) 0%,
    transparent 70%
  );
  border-radius: 50%;
}

.cta-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 16px;
  position: relative;
}

.cta-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
}

.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  position: relative;
}

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.footer-brand .nav-logo {
  width: 32px;
  height: 32px;
  font-size: 0.9rem;
}

.footer-brand span {
  font-size: 1.1rem;
  font-weight: 700;
}

.footer-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 32px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-socials {
  display: flex;
  gap: 16px;
}

.footer-socials a {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition);
  font-size: 1rem;
}

.footer-socials a:hover {
  border-color: var(--border-glow);
  color: var(--primary);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .proof-cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

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

  .nav-links {
    display: none;
  }
  .mobile-toggle {
    display: flex;
  }

  /* Mobile menu */
  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(3, 7, 18, 0.98);
    backdrop-filter: blur(20px);
    justify-content: center;
    align-items: center;
    gap: 24px;
    z-index: 999;
  }

  .nav-links.active a {
    font-size: 1.3rem;
  }

  .hero-title {
    font-size: clamp(2.2rem, 8vw, 3.5rem);
  }
  .hero-actions {
    flex-direction: column;
  }
  .hero-stats {
    flex-direction: column;
    gap: 24px;
  }

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

  .steps-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .steps-grid::before {
    display: none;
  }

  .proof-cards {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .cta-box {
    padding: 48px 24px;
  }
  .cta-actions {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  .hero-badge {
    font-size: 0.75rem;
  }
  .tech-grid {
    gap: 10px;
  }
  .tech-badge {
    padding: 12px 20px;
    font-size: 0.85rem;
  }
}