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

:root {
  --clr-bg: #0b0f14;
  --clr-surface: #141a23;
  --clr-surface-alt: #1b2330;
  --clr-border: #243044;
  --clr-text: #e4e8ee;
  --clr-text-muted: #8a94a6;
  --clr-accent: #6c5ce7;
  --clr-accent-light: #a29bfe;
  --clr-accent-glow: rgba(108, 92, 231, 0.25);
  --clr-white: #ffffff;
  --clr-gradient-start: #6c5ce7;
  --clr-gradient-end: #00cec9;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --font-sans: "Inter", system-ui, -apple-system, sans-serif;
  --font-display: "Outfit", var(--font-sans);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-sans);
  background: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

ul {
  list-style: none;
}
img {
  max-width: 100%;
  display: block;
}

/* ===== Utility ===== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.gradient-text {
  background: linear-gradient(
    135deg,
    var(--clr-gradient-start),
    var(--clr-gradient-end)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 100px;
  background: var(--clr-accent-glow);
  color: var(--clr-accent-light);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  border: 1px solid rgba(108, 92, 231, 0.3);
}

/* ===== Navigation ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(11, 15, 20, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--clr-border);
  padding: 10px 0;
}

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

.logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo span {
  color: var(--clr-accent-light);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--clr-text-muted);
  transition: var(--transition);
  position: relative;
}

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

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

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 100px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-sans);
}

.btn-primary {
  background: linear-gradient(
    135deg,
    var(--clr-gradient-start),
    var(--clr-gradient-end)
  );
  color: var(--clr-white);
  box-shadow: 0 4px 24px var(--clr-accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--clr-accent-glow);
}

.btn-outline {
  background: transparent;
  color: var(--clr-text);
  border: 1.5px solid var(--clr-border);
}

.btn-outline:hover {
  border-color: var(--clr-accent);
  background: var(--clr-accent-glow);
}

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

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

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

.hero::before {
  content: "";
  position: absolute;
  top: -200px;
  right: -200px;
  width: 700px;
  height: 700px;
  background: radial-gradient(
    circle,
    var(--clr-accent-glow) 0%,
    transparent 70%
  );
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(
    circle,
    rgba(0, 206, 201, 0.12) 0%,
    transparent 70%
  );
  pointer-events: none;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

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

.hero-content .badge {
  margin-bottom: 24px;
}

.hero-content h1 {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero-content p {
  font-size: 1.2rem;
  color: var(--clr-text-muted);
  max-width: 480px;
  margin-bottom: 40px;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.phone-mockup {
  position: relative;
  width: 300px;
  height: 600px;
  background: var(--clr-surface);
  border-radius: 40px;
  border: 2px solid var(--clr-border);
  padding: 12px;
  box-shadow:
    0 40px 80px rgba(0, 0, 0, 0.4),
    0 0 0 1px rgba(255, 255, 255, 0.05) inset;
  overflow: hidden;
}

.phone-mockup::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 28px;
  background: var(--clr-bg);
  border-radius: 0 0 20px 20px;
  z-index: 10;
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: var(--clr-surface-alt);
  border-radius: 30px;
  padding: 48px 20px 20px;
  overflow: hidden;
}

.phone-screen .screen-header {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--clr-text);
}

.note-card {
  background: var(--clr-surface);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  margin-bottom: 12px;
  border: 1px solid var(--clr-border);
  animation: fadeInUp 0.6s ease forwards;
  opacity: 0;
}

.note-card:nth-child(2) {
  animation-delay: 0.1s;
}
.note-card:nth-child(3) {
  animation-delay: 0.2s;
}
.note-card:nth-child(4) {
  animation-delay: 0.3s;
}
.note-card:nth-child(5) {
  animation-delay: 0.4s;
}

.note-card .note-title {
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 4px;
}

.note-card .note-preview {
  font-size: 0.75rem;
  color: var(--clr-text-muted);
  line-height: 1.5;
}

.note-card .note-meta {
  font-size: 0.65rem;
  color: var(--clr-text-muted);
  margin-top: 8px;
  opacity: 0.6;
}

.floating-shape {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.shape-1 {
  width: 80px;
  height: 80px;
  background: var(--clr-accent-glow);
  top: 40px;
  right: -20px;
  animation: float 6s ease-in-out infinite;
}

.shape-2 {
  width: 40px;
  height: 40px;
  background: rgba(0, 206, 201, 0.2);
  bottom: 80px;
  left: -10px;
  animation: float 4s ease-in-out infinite reverse;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== Features ===== */
.features {
  background: var(--clr-surface);
  position: relative;
}

.features::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--clr-border),
    transparent
  );
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-header p {
  color: var(--clr-text-muted);
  font-size: 1.1rem;
}

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

.feature-card {
  background: var(--clr-surface-alt);
  border-radius: var(--radius-md);
  padding: 36px 32px;
  border: 1px solid var(--clr-border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--clr-gradient-start),
    var(--clr-gradient-end)
  );
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--clr-accent);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3);
}

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

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  background: var(--clr-accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  font-size: 1.5rem;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--clr-text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ===== Platforms ===== */
.platforms {
  position: relative;
}

.platforms-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.platform-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: 40px 24px;
  text-align: center;
  transition: var(--transition);
}

.platform-card:hover {
  border-color: var(--clr-accent);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3);
}

.platform-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.platform-card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.platform-card p {
  color: var(--clr-text-muted);
  font-size: 0.85rem;
}

/* ===== About / Kotlin ===== */
.about {
  background: var(--clr-surface);
  position: relative;
}

.about::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--clr-border),
    transparent
  );
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-content {
  max-width: 500px;
}

.about-content h2 {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.about-content p {
  color: var(--clr-text-muted);
  font-size: 1.05rem;
  margin-bottom: 16px;
}

.about-visual {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.tech-pill {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  background: var(--clr-surface-alt);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: var(--transition);
}

.tech-pill:hover {
  border-color: var(--clr-accent);
}

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

.tech-pill .pill-text small {
  display: block;
  color: var(--clr-text-muted);
  font-weight: 400;
  font-size: 0.8rem;
  margin-top: 2px;
}

/* ===== CTA ===== */
.cta {
  text-align: center;
  position: relative;
}

.cta::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(
    circle,
    var(--clr-accent-glow) 0%,
    transparent 70%
  );
  pointer-events: none;
}

.cta-content {
  position: relative;
  z-index: 1;
  max-width: 640px;
  margin: 0 auto;
}

.cta-content h2 {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.cta-content p {
  color: var(--clr-text-muted);
  font-size: 1.15rem;
  margin-bottom: 40px;
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Footer ===== */
.footer {
  background: var(--clr-surface);
  padding: 60px 0 32px;
  border-top: 1px solid var(--clr-border);
}

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

.footer-brand .logo {
  margin-bottom: 16px;
}

.footer-brand p {
  color: var(--clr-text-muted);
  font-size: 0.9rem;
  max-width: 300px;
  line-height: 1.7;
}

.footer-col h4 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 20px;
  color: var(--clr-text);
}

.footer-col a {
  display: block;
  color: var(--clr-text-muted);
  font-size: 0.9rem;
  padding: 6px 0;
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--clr-accent-light);
  transform: translateX(4px);
}

.footer-bottom {
  border-top: 1px solid var(--clr-border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-bottom p {
  color: var(--clr-text-muted);
  font-size: 0.85rem;
}

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

.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--clr-surface-alt);
  border: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: var(--transition);
}

.footer-social a:hover {
  background: var(--clr-accent);
  border-color: var(--clr-accent);
  transform: translateY(-2px);
}

/* ===== Animations ===== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 0.8s ease,
    transform 0.8s ease;
}

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

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content p {
    margin: 0 auto 40px;
  }
  .hero-buttons {
    justify-content: center;
  }

  .hero-visual {
    margin-top: 40px;
  }

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

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(11, 15, 20, 0.97);
    backdrop-filter: blur(20px);
    justify-content: center;
    align-items: center;
    gap: 28px;
    z-index: 999;
  }

  .nav-links.active a {
    font-size: 1.3rem;
    color: var(--clr-text);
  }

  .mobile-toggle {
    display: flex;
    z-index: 1001;
  }

  .mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  .mobile-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  .mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .hero-content h1 {
    font-size: 2.75rem;
  }
  .section-header h2 {
    font-size: 2rem;
  }
  .cta-content h2 {
    font-size: 2.25rem;
  }

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

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

@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 2.25rem;
  }
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  .btn {
    width: 100%;
    justify-content: center;
  }
  .phone-mockup {
    width: 260px;
    height: 520px;
  }
  .platforms-grid {
    grid-template-columns: 1fr;
  }
}