/* ============================================
   Nord Colour Scheme + Design Tokens
   ============================================ */
:root {
  /* Polar Night */
  --nord0: #2E3440;
  --nord1: #3B4252;
  --nord2: #434C5E;
  --nord3: #4C566A;
  /* Snow Storm */
  --nord4: #D8DEE9;
  --nord5: #E5E9F0;
  --nord6: #ECEFF4;
  /* Frost */
  --nord7: #8FBCBB;
  --nord8: #88C0D0;
  --nord9: #81A1C1;
  --nord10: #5E81AC;
  /* Aurora */
  --nord11: #BF616A;
  --nord12: #D08770;
  --nord13: #EBCB8B;
  --nord14: #A3BE8C;
  --nord15: #B48EAD;

  /* Design Tokens */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.6s ease;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
  --glow-primary: 0 0 20px rgba(136, 192, 208, 0.3);
  --glow-soft: 0 0 40px rgba(136, 192, 208, 0.15);
  --border-radius: 8px;
  --border-radius-lg: 16px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Oxygen, Ubuntu, Cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
  background-color: var(--nord0);
  color: var(--nord4);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Subtle dot pattern background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(136, 192, 208, 0.03) 1px, transparent 0);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: -1;
}

a {
  color: var(--nord8);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--nord7);
}

/* Animated underline for prose links */
.prose a {
  background-image: linear-gradient(var(--nord8), var(--nord8));
  background-size: 0% 2px;
  background-position: left bottom;
  background-repeat: no-repeat;
  transition: background-size var(--transition-normal), color var(--transition-fast);
  padding-bottom: 1px;
}

.prose a:hover {
  background-size: 100% 2px;
}

/* Custom Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--nord0); }
::-webkit-scrollbar-thumb { background: var(--nord3); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--nord8); }

/* ============================================
   Container
   ============================================ */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

/* ============================================
   Scroll Progress Bar
   ============================================ */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--nord8), var(--nord9));
  z-index: 200;
  transition: width 0.1s linear;
}

/* ============================================
   Navigation - Glassmorphism
   ============================================ */
nav {
  background: rgba(59, 66, 82, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(136, 192, 208, 0.1);
  transition: background var(--transition-normal), box-shadow var(--transition-normal);
}

nav.nav-scrolled {
  background: rgba(59, 66, 82, 0.95);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}

.nav-brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--nord6);
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 1.5rem;
}

.nav-links a {
  color: var(--nord4);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.25rem 0;
  position: relative;
  transition: color var(--transition-fast);
}

/* Animated underline indicator */
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--nord8), var(--nord9));
  border-radius: 1px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
}

.nav-links a:hover::after {
  transform: scaleX(1);
}

.nav-links a.active {
  color: var(--nord8);
}

.nav-links a.active::after {
  transform: scaleX(1);
}

/* ============================================
   Hamburger - Animated Morph
   ============================================ */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem;
  z-index: 10;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--nord4);
  margin: 5px 0;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
  transform-origin: center;
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  text-align: center;
  padding: 6rem 1.5rem;
  position: relative;
  overflow: hidden;
  background: linear-gradient(-45deg, var(--nord0), var(--nord1), #2a3a4a, var(--nord0));
  background-size: 400% 400%;
  animation: gradientShift 15s ease infinite;
}

/* Floating decorative blobs */
.hero::before,
.hero::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.12;
  pointer-events: none;
}

.hero::before {
  width: 400px;
  height: 400px;
  background: var(--nord8);
  top: -100px;
  right: -100px;
  animation: float 10s ease-in-out infinite;
}

.hero::after {
  width: 300px;
  height: 300px;
  background: var(--nord9);
  bottom: -80px;
  left: -80px;
  animation: float-reverse 12s ease-in-out infinite;
}

.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

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

.hero h1 {
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--nord6);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.hero p {
  font-size: 1.2rem;
  color: var(--nord4);
  max-width: 600px;
  margin: 0 auto;
  min-height: 1.8em;
}

.hero p[data-typing] {
  visibility: hidden;
}

.hero-ctas {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 2rem;
  flex-wrap: wrap;
}

/* ============================================
   Sections
   ============================================ */
.section {
  padding: 4rem 0;
}

.section h2 {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--nord6);
  margin-bottom: 1.5rem;
}

.section p {
  margin-bottom: 1rem;
}

/* ============================================
   Page Header
   ============================================ */
.page-header {
  text-align: center;
  padding: 3rem 1.5rem 2rem;
  position: relative;
}

/* Gradient divider */
.page-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  max-width: 600px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--nord8), var(--nord9), transparent);
}

.page-header h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--nord6);
}

/* ============================================
   App Cards
   ============================================ */
.app-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  padding: 2rem 0;
}

.app-card {
  background-color: var(--nord1);
  border-radius: 12px;
  padding: 1.5rem;
  border: 1px solid var(--nord2);
  transition: border-color var(--transition-normal), transform var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.app-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 12px;
  padding: 1px;
  background: linear-gradient(135deg, transparent, transparent);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  transition: background var(--transition-normal);
  pointer-events: none;
}

.app-card:hover {
  border-color: transparent;
  box-shadow: 0 0 30px rgba(136, 192, 208, 0.12), var(--shadow-md);
}

.app-card:hover::before {
  background: linear-gradient(135deg, var(--nord8), var(--nord9));
}

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

.app-icon {
  width: 64px;
  height: 64px;
  border-radius: 14px;
  object-fit: cover;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  transition: transform var(--transition-normal);
}

.app-card:hover .app-icon {
  transform: scale(1.05);
}

/* Emoji icon fallback */
.app-icon-emoji {
  width: 64px;
  height: 64px;
  border-radius: 14px;
  background: var(--nord2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  transition: transform var(--transition-normal);
}

.app-card:hover .app-icon-emoji {
  transform: scale(1.05);
}

.app-card h3 {
  color: var(--nord6);
  font-size: 1.2rem;
  font-weight: 600;
}

.app-card p {
  color: var(--nord4);
  margin-bottom: 1rem;
  font-size: 0.95rem;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.app-links {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-block;
  padding: 0.6rem 1.25rem;
  border-radius: var(--border-radius);
  font-size: 0.9rem;
  font-weight: 500;
  transition: background-color var(--transition-fast), transform 0.15s ease, box-shadow var(--transition-normal), color var(--transition-fast);
  cursor: pointer;
  border: none;
  font-family: inherit;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(135deg, var(--nord10), var(--nord9));
  color: var(--nord6);
}

.btn-primary:hover {
  box-shadow: 0 4px 15px rgba(94, 129, 172, 0.4);
  color: var(--nord6);
}

.btn-secondary {
  background-color: var(--nord2);
  color: var(--nord4);
}

.btn-secondary:hover {
  background-color: var(--nord3);
  color: var(--nord6);
  box-shadow: var(--shadow-sm);
}

.btn-magnetic {
  transition: transform 0.15s ease, background-color var(--transition-fast), box-shadow var(--transition-normal), color var(--transition-fast);
}

/* Button loading state */
.btn-loading {
  pointer-events: none;
  opacity: 0.7;
  position: relative;
}

.btn-loading::after {
  content: '';
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: var(--nord6);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-left: 8px;
  vertical-align: middle;
}

/* ============================================
   Contact Form - Floating Labels
   ============================================ */
.form-container {
  max-width: 560px;
  margin: 0 auto;
  padding: 2rem 0;
}

.form-group-float {
  position: relative;
  margin-bottom: 1.5rem;
}

.form-group-float label {
  position: absolute;
  left: 0.85rem;
  top: 0.7rem;
  font-size: 1rem;
  color: var(--nord3);
  pointer-events: none;
  transition: transform var(--transition-normal), font-size var(--transition-normal), color var(--transition-normal);
  transform-origin: left top;
}

.form-group-float input,
.form-group-float textarea {
  width: 100%;
  padding: 0.85rem;
  padding-top: 1.4rem;
  background-color: var(--nord1);
  border: 1px solid var(--nord3);
  border-radius: var(--border-radius);
  color: var(--nord6);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.form-group-float input:focus,
.form-group-float textarea:focus {
  outline: none;
  border-color: var(--nord8);
  box-shadow: 0 0 0 3px rgba(136, 192, 208, 0.2);
}

.form-group-float.focused label,
.form-group-float.filled label {
  transform: translateY(-0.6rem) scale(0.8);
  color: var(--nord8);
}

.form-group-float textarea {
  resize: vertical;
  min-height: 140px;
}

/* Validation styling */
.form-group-float input:invalid:not(:focus):not(:placeholder-shown),
.form-group-float textarea:invalid:not(:focus):not(:placeholder-shown) {
  border-color: var(--nord11);
}

.form-shake {
  animation: shake 0.5s ease;
}

.form-submit {
  text-align: center;
  margin-top: 1.5rem;
}

.form-submit .btn {
  padding: 0.75rem 2.5rem;
  font-size: 1rem;
}

/* ============================================
   Prose (Privacy, Terms)
   ============================================ */
.prose {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 0;
}

.prose h2 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--nord6);
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.prose h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--nord5);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.prose p,
.prose ul {
  margin-bottom: 1rem;
  color: var(--nord4);
}

.prose ul {
  padding-left: 1.5rem;
}

.prose li {
  margin-bottom: 0.4rem;
}

/* ============================================
   Footer - Redesigned
   ============================================ */
footer {
  margin-top: auto;
  background-color: var(--nord1);
  position: relative;
}

/* Gradient divider above footer */
footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--nord8), var(--nord9), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  padding: 2.5rem 0 1.5rem;
}

.footer-col h4 {
  color: var(--nord6);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.footer-col p {
  font-size: 0.85rem;
  color: var(--nord3);
  line-height: 1.5;
}

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

.footer-col ul li {
  margin-bottom: 0.4rem;
}

.footer-col ul a {
  font-size: 0.85rem;
  color: var(--nord4);
  transition: color var(--transition-fast);
}

.footer-col ul a:hover {
  color: var(--nord8);
}

.footer-bottom {
  text-align: center;
  padding: 1rem 0 1.5rem;
  font-size: 0.8rem;
  color: var(--nord3);
  border-top: 1px solid var(--nord2);
}

/* Social icons in footer */
.footer-social {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--nord2);
  color: var(--nord4);
  transition: background var(--transition-fast), color var(--transition-fast), transform 0.15s ease;
}

.footer-social a:hover {
  background: var(--nord8);
  color: var(--nord0);
  transform: translateY(-2px);
}

.footer-social a svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* ============================================
   Back to Top Button
   ============================================ */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(59, 66, 82, 0.9);
  backdrop-filter: blur(8px);
  border: 1px solid var(--nord2);
  color: var(--nord4);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition-normal), visibility var(--transition-normal), transform var(--transition-normal), background var(--transition-fast), color var(--transition-fast);
  z-index: 50;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--nord8);
  color: var(--nord0);
  border-color: var(--nord8);
  box-shadow: var(--glow-primary);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ============================================
   Responsive
   ============================================ */
@media (min-width: 768px) {
  .app-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }

  .hero h1 {
    font-size: 3.5rem;
  }
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(59, 66, 82, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 1rem 1.5rem;
    border-bottom: 1px solid rgba(136, 192, 208, 0.1);
    gap: 0.5rem;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .hero {
    padding: 4rem 1.5rem;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    text-align: center;
  }

  .footer-social {
    justify-content: center;
  }

  .back-to-top {
    bottom: 1.5rem;
    right: 1.5rem;
  }
}