/* ================================================================
   Notester Landing Page — Premium Design System
   ================================================================ */

/* ---------- CSS Variables ---------- */
:root {
  --color-dark-blue: #0b2d39;
  --color-dark-blue-accent: #164F64;
  --color-dark-blue-light: #BBE4F3;
  --color-light-shade: #e9f5f9;
  --color-blue-shade: #2282A5;
  --color-deep-blue: #223E6D;
  --color-standard-blue: #007aff;
  --color-sky-blue: #348CC3;
  --color-faded-blue: #92A5C6;
  --color-yellow: #FFD000;
  --color-green: #78c478;
  --color-red: #be4d25;
  --color-white: #ffffff;
  --color-off-white: #fafafa;
  --color-text: #202020;
  --color-text-muted: #64748b;

  --gradient-primary: linear-gradient(135deg, #2282A5 0%, #164F64 50%, #0b2d39 100%);
  --gradient-accent: linear-gradient(135deg, #FFD000 0%, #F5E612 100%);
  --gradient-text: linear-gradient(135deg, #2282A5 0%, #348CC3 50%, #BBE4F3 100%);

  --shadow-sm: 0 1px 3px rgba(11, 45, 57, 0.08);
  --shadow-md: 0 4px 16px rgba(11, 45, 57, 0.1);
  --shadow-lg: 0 8px 32px rgba(11, 45, 57, 0.12);
  --shadow-xl: 0 16px 64px rgba(11, 45, 57, 0.16);
  --shadow-glow: 0 0 60px rgba(34, 130, 165, 0.3);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

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

body {
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-white);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

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

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

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 64px;
}

.section-badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: var(--color-light-shade);
  color: var(--color-blue-shade);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 16px;
}

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

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

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

.btn-primary {
  background: var(--gradient-primary);
  color: var(--color-white);
  box-shadow: 0 4px 20px rgba(22, 79, 100, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(22, 79, 100, 0.45);
}

.btn-ghost {
  background: transparent;
  color: var(--color-dark-blue);
  border: 2px solid rgba(11, 45, 57, 0.15);
}

.btn-ghost:hover {
  background: var(--color-light-shade);
  border-color: var(--color-blue-shade);
  color: var(--color-blue-shade);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1rem;
}

/* ---------- Navbar ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(11, 45, 57, 0.06);
  transition: var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--color-dark-blue);
}

.logo-icon {
  font-size: 1.5rem;
}

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

.nav-link {
  font-weight: 500;
  font-size: 0.92rem;
  color: var(--color-text-muted);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-blue-shade);
  border-radius: 2px;
  transition: var(--transition-base);
}

.nav-link:hover {
  color: var(--color-dark-blue);
}

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

.nav-btn {
  padding: 10px 24px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  color: var(--color-white) !important;
  font-weight: 600;
  font-size: 0.92rem;
}

.nav-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(22, 79, 100, 0.3);
}

.nav-btn::after {
  display: none !important;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--color-dark-blue);
  border-radius: 2px;
  transition: var(--transition-base);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  padding: 16px 24px 24px;
  gap: 4px;
}

.mobile-nav.active {
  display: flex;
}

.mobile-nav-link {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  color: var(--color-text-muted);
}

.mobile-nav-link:hover {
  background: var(--color-light-shade);
  color: var(--color-dark-blue);
}

.mobile-nav .nav-btn {
  text-align: center;
  margin-top: 8px;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 72px;
  overflow: hidden;
  background: linear-gradient(180deg, var(--color-white) 0%, var(--color-light-shade) 100%);
}

.hero-bg-shapes {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.shape {
  position: absolute;
  border-radius: 50%;
  opacity: 0.08;
}

.shape-1 {
  width: 600px;
  height: 600px;
  background: var(--color-blue-shade);
  top: -200px;
  right: -150px;
  animation: float 20s ease-in-out infinite;
}

.shape-2 {
  width: 400px;
  height: 400px;
  background: var(--color-dark-blue-light);
  bottom: -100px;
  left: -100px;
  animation: float 25s ease-in-out infinite reverse;
}

.shape-3 {
  width: 200px;
  height: 200px;
  background: var(--color-yellow);
  top: 40%;
  left: 20%;
  animation: float 15s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -30px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  background: rgba(34, 130, 165, 0.1);
  color: var(--color-blue-shade);
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease-out;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.1;
  color: var(--color-dark-blue);
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease-out 0.1s both;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 520px;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
  animation: fadeInUp 0.6s ease-out 0.3s both;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 24px;
  animation: fadeInUp 0.6s ease-out 0.4s both;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--color-dark-blue);
}

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

.stat-divider {
  width: 1px;
  height: 36px;
  background: rgba(11, 45, 57, 0.12);
}

.hero-image {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeInUp 0.8s ease-out 0.3s both;
}

.phone-glow {
  position: absolute;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(34, 130, 165, 0.2) 0%, transparent 70%);
  filter: blur(40px);
  z-index: 0;
}

.hero-phone {
  max-height: 580px;
  width: auto;
  position: relative;
  z-index: 1;
  border-radius: var(--radius-xl);
  filter: drop-shadow(0 32px 64px rgba(11, 45, 57, 0.25));
  animation: phoneFloat 6s ease-in-out infinite;
}

@keyframes phoneFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--color-text-muted);
  font-size: 0.8rem;
  font-weight: 500;
  animation: fadeInUp 0.6s ease-out 0.6s both;
}

.scroll-arrow {
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- Features ---------- */
.features {
  padding: 120px 0;
  background: var(--color-white);
}

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

.feature-card {
  background: var(--color-white);
  border: 1px solid rgba(11, 45, 57, 0.06);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: var(--transition-base);
}

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

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

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-icon-blue {
  background: rgba(34, 130, 165, 0.1);
  color: var(--color-blue-shade);
}

.feature-icon-green {
  background: rgba(120, 196, 120, 0.15);
  color: var(--color-green);
}

.feature-icon-purple {
  background: rgba(124, 77, 255, 0.1);
  color: #7c4dff;
}

.feature-icon-red {
  background: rgba(190, 77, 37, 0.1);
  color: var(--color-red);
}

.feature-icon-teal {
  background: rgba(22, 79, 100, 0.1);
  color: var(--color-dark-blue-accent);
}

.feature-icon-yellow {
  background: rgba(255, 208, 0, 0.15);
  color: #e6a800;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-dark-blue);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ---------- Showcase ---------- */
.showcase {
  padding: 120px 0;
  background: var(--color-light-shade);
}

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

.showcase-item {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-smooth);
}

.showcase-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.showcase-image-wrapper {
  height: 360px;
  overflow: hidden;
  background: var(--color-dark-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.showcase-image-wrapper img {
  max-height: 100%;
  width: auto;
  border-radius: var(--radius-md);
  transition: var(--transition-smooth);
}

.showcase-item:hover .showcase-image-wrapper img {
  transform: scale(1.03);
}

.showcase-info {
  padding: 28px;
}

.showcase-info h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-dark-blue);
  margin-bottom: 8px;
}

.showcase-info p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ---------- Why Section ---------- */
.why-section {
  padding: 120px 0;
  background: var(--color-white);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.why-card {
  text-align: center;
  padding: 40px 24px;
  border-radius: var(--radius-lg);
  background: var(--color-light-shade);
  transition: var(--transition-smooth);
  border: 1px solid transparent;
}

.why-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(34, 130, 165, 0.15);
  background: var(--color-white);
}

.why-emoji {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.why-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-dark-blue);
  margin-bottom: 10px;
}

.why-card p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ---------- Download Section ---------- */
.download-section {
  position: relative;
  padding: 120px 0;
  background: var(--gradient-primary);
  overflow: hidden;
}

.download-bg-shapes {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.shape-4 {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.03);
  top: -200px;
  right: -100px;
}

.shape-5 {
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  bottom: -100px;
  left: -50px;
}

.download-content {
  text-align: center;
  position: relative;
  z-index: 1;
}

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

.download-subtitle {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.75);
  max-width: 560px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.download-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.store-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--color-white);
  transition: var(--transition-base);
}

.store-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.store-label {
  display: block;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  opacity: 0.8;
  text-align: left;
}

.store-name {
  display: block;
  font-size: 1.05rem;
  font-weight: 700;
  text-align: left;
}

.download-note {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.55);
  font-weight: 500;
}

/* ---------- Footer ---------- */
.footer {
  padding: 48px 0;
  background: var(--color-dark-blue);
  text-align: center;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.footer-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 8px;
}

.footer .logo-text {
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--color-white);
}

.footer-tagline {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 20px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.88rem;
  font-weight: 500;
}

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

.footer-copy {
  color: rgba(255, 255, 255, 0.3);
  font-size: 0.82rem;
}

/* ---------- Scroll Animations ---------- */
[data-animate] {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

[data-animate].animated {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }

  .hero-subtitle {
    margin: 0 auto 36px;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .hero-phone {
    max-height: 440px;
  }

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

  .showcase-grid {
    grid-template-columns: 1fr;
    max-width: 440px;
    margin: 0 auto;
  }

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

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

  .mobile-menu-btn {
    display: flex;
  }

  .hero-scroll-indicator {
    display: none;
  }

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

  .why-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }

  .features,
  .showcase,
  .why-section,
  .download-section {
    padding: 80px 0;
  }

  .section-header {
    margin-bottom: 40px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-stats {
    flex-direction: column;
    gap: 16px;
  }

  .stat-divider {
    width: 40px;
    height: 1px;
  }

  .download-buttons {
    flex-direction: column;
    align-items: center;
  }

  .store-btn {
    width: 100%;
    max-width: 260px;
    justify-content: center;
  }
}