@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;600;700;800;900&family=DM+Sans:ital,wght@0,400;0,500;0,600;1,400&display=swap');

:root {
  --cyan:       #00a1ce;
  --cyan-dark:  #0082a8;
  --cyan-light: #b3efff;
  --coral:      #ff6347;
  --coral-dark: #e5503a;
  --thistle:    #d8bfd8;
  --white:      #ffffff;
  --off-white:  #f7f9fb;
  --gray-100:   #f0f4f8;
  --gray-200:   #e2e8f0;
  --gray-500:   #718096;
  --gray-700:   #2d3748;
  --text:       #1a202c;

  --grad-brand:
    linear-gradient(135deg, var(--thistle) 0%, var(--cyan) 55%, var(--cyan-light) 100%);
  --grad-hero:
    linear-gradient(40deg, rgba(0,91,150,0.12) 25%, transparent 25%, transparent 60%, rgba(0,91,187,0.10) 75%),
    linear-gradient(70deg, rgba(0,91,187,0.10) 50%, transparent 25%, transparent 75%, rgba(0,91,187,0.10) 40%),
    linear-gradient(135deg, var(--thistle) 0%, var(--cyan) 55%, var(--cyan-light) 100%);
  --grad-footer:
    linear-gradient(80deg, rgba(255,255,255,0.07) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.07) 75%),
    linear-gradient(45deg, rgba(255,255,255,0.07) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.07) 75%),
    linear-gradient(135deg, var(--thistle) 0%, var(--cyan) 55%, var(--cyan-light) 100%);

  --shadow-sm:  0 2px 8px rgba(0,0,0,0.07);
  --shadow-md:  0 6px 24px rgba(0,0,0,0.10);
  --shadow-lg:  0 16px 48px rgba(0,0,0,0.13);
  --shadow-card: 0 4px 20px rgba(0,161,206,0.10);
  --shadow-card-hover: 0 14px 40px rgba(0,161,206,0.22);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --t-fast: 0.2s var(--ease);
  --t-med:  0.38s var(--ease);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', 'Poppins', sans-serif;
  color: var(--text);
  background: var(--grad-brand);
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
  line-height: 1.6;
}

h1, h2, h3, h4 {
  font-family: 'Outfit', 'Poppins', sans-serif;
  line-height: 1.15;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }

/* ===== HEADER ===== */
header {
  backdrop-filter: blur(14px) saturate(1.6);
  -webkit-backdrop-filter: blur(14px) saturate(1.6);
  background-color: rgba(255,255,255,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  padding: 1.1em 0;
  position: fixed; top: 0; width: 100%;
  z-index: 1000;
  transition: background-color var(--t-med), box-shadow var(--t-med), border-color var(--t-med);
  will-change: background-color;
}

header.scrolled {
  background-color: rgba(255,255,255,0.96);
  border-bottom: 1px solid var(--gray-200);
  box-shadow: 0 2px 20px rgba(0,0,0,0.07);
}

header .container {
  display: flex;
  justify-content: space-between; align-items: center;
  max-width: 1400px; margin: 0 auto;
  padding: 0 clamp(1.2em, 4vw, 3em);
}

header h1 {
  font-size: clamp(0.95em, 2vw, 1.25em);
  font-weight: 800; color: var(--white);
  white-space: nowrap; flex-shrink: 0;
  letter-spacing: 1.5px; text-transform: uppercase;
  transition: color var(--t-med);
}
header.scrolled h1 { color: var(--cyan); }

header nav ul { list-style: none; display: flex; align-items: center; gap: clamp(0.5em,1.5vw,1.6em); }

header nav ul li a {
  color: rgba(255,255,255,0.92);
  text-decoration: none;
  font-size: clamp(0.78em, 1vw, 0.95em);
  font-weight: 500; white-space: nowrap;
  padding: 0.25em 0; position: relative;
  transition: color var(--t-fast);
}

header nav ul li a::after {
  content: ''; position: absolute; bottom: -2px; left: 0;
  width: 0; height: 2px; background: var(--coral); border-radius: 2px;
  transition: width var(--t-med);
}
header nav ul li a:hover::after { width: 100%; }
header.scrolled nav ul li a { color: var(--gray-700); }

.install-link {
  background: var(--coral); padding: 0.48em 1.2em; border-radius: 50px;
  color: var(--white) !important; font-weight: 600;
  font-size: clamp(0.78em, 1vw, 0.92em);
  box-shadow: 0 4px 14px rgba(255,99,71,0.35);
  transition: background var(--t-fast), transform var(--t-fast), box-shadow var(--t-fast);
  flex-shrink: 0;
}
.install-link:hover { background: var(--coral-dark) !important; transform: translateY(-1px); }
.install-link::after { display: none !important; }
header.scrolled .install-link, .install-link.scrolled {
  background: var(--cyan) !important;
  box-shadow: 0 4px 14px rgba(0,161,206,0.35) !important;
}

/* ===== HAMBURGER ===== */
.hamburger {
  display: none; flex-direction: column;
  justify-content: space-between;
  width: 28px; height: 20px;
  cursor: pointer; background: none; border: none; padding: 0;
  flex-shrink: 0; z-index: 1100;
}
.hamburger span {
  display: block; width: 100%; height: 2.5px;
  background: var(--white); border-radius: 3px;
  transition: transform 0.32s cubic-bezier(.77,0,.18,1), opacity 0.28s ease, background-color var(--t-med);
}
header.scrolled .hamburger span { background: var(--cyan); }
.hamburger.open span:nth-child(1) { transform: translateY(8.75px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-8.75px) rotate(-45deg); }

/* ===== MOBILE NAV ===== */
.mobile-nav {
  display: none; position: fixed; inset: 0;
  background: linear-gradient(145deg, var(--cyan-dark) 0%, var(--cyan) 60%, #00c4f5 100%);
  z-index: 999; flex-direction: column;
  align-items: center; justify-content: center;
  gap: clamp(1em, 3.5vh, 1.8em);
  opacity: 0; transform: translateY(-12px);
  transition: opacity 0.32s var(--ease), transform 0.32s var(--ease);
  pointer-events: none;
}
.mobile-nav.open { opacity: 1; transform: translateY(0); pointer-events: all; }

.mobile-nav a {
  color: var(--white); text-decoration: none;
  font-family: 'Outfit', sans-serif;
  font-size: clamp(1.3em, 5vw, 1.85em); font-weight: 700; letter-spacing: 0.5px;
  transition: color var(--t-fast), transform var(--t-fast);
}
.mobile-nav a:hover { color: var(--coral); transform: scale(1.04); }
.mobile-nav .install-link {
  background: var(--coral) !important; padding: 0.6em 2.2em !important;
  border-radius: 50px !important; margin-top: 0.6em;
  font-size: clamp(1em, 3.5vw, 1.3em) !important;
}

/* ===== HERO — INSTALL ===== */
.hero {
  position: relative; min-height: 100vh; height: auto;
  color: var(--white); text-align: center;
  display: flex; align-items: center; justify-content: center; flex-direction: column;
  overflow: hidden;
  padding: clamp(7em, 15vw, 10em) clamp(1em, 5vw, 3em) clamp(4em, 8vw, 6em);
  background: var(--grad-hero);
}

.hero::before {
  content: '';
  position: absolute;
  width: clamp(250px, 45vw, 600px);
  height: clamp(250px, 45vw, 600px);
  background: radial-gradient(circle, rgba(255,255,255,0.12) 0%, transparent 70%);
  border-radius: 50%; top: -8%; right: -8%;
  pointer-events: none;
  animation: blobFloat 9s ease-in-out infinite alternate;
}

@keyframes blobFloat {
  from { transform: translate(0,0) scale(1); }
  to   { transform: translate(-4%, 5%) scale(1.07); }
}

.hero .container {
  position: relative; z-index: 1;
  width: 100%; max-width: 860px; text-align: center;
}

/* Step number badge */
.install-badge {
  display: inline-flex; align-items: center; gap: 0.6em;
  background: rgba(255,255,255,0.16);
  border: 1px solid rgba(255,255,255,0.3);
  backdrop-filter: blur(8px);
  padding: 0.4em 1.2em; border-radius: 50px;
  font-size: clamp(0.72em, 1.2vw, 0.85em);
  font-weight: 600; letter-spacing: 0.6px; text-transform: uppercase;
  margin-bottom: 1em;
  animation: fadeDown 0.7s var(--ease) both;
}

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-14px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero h2 {
  font-size: clamp(1.6em, 5.5vw, 4.2em); font-weight: 900;
  letter-spacing: -1px; margin-bottom: 0.5em;
  text-shadow: 0 2px 18px rgba(0,0,0,0.15);
  animation: fadeUp 0.8s 0.15s var(--ease) both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* QR code card */
.qr-card {
  display: inline-block;
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: clamp(0.8em, 2vw, 1.4em);
  box-shadow: 0 16px 50px rgba(0,0,0,0.22);
  margin: 1.5em auto;
  animation: fadeUp 0.8s 0.3s var(--ease) both;
}

.hero .qr-code {
  width: clamp(140px, 28vw, 260px);
  height: clamp(140px, 28vw, 260px);
  object-fit: contain; display: block;
  border-radius: var(--radius-sm);
}

.qr-label {
  font-size: clamp(0.72em, 1.1vw, 0.82em);
  color: var(--gray-500); margin-top: 0.6em;
  font-weight: 600; letter-spacing: 0.5px;
}

/* Steps */
.install-steps {
  text-align: left;
  margin: 0 auto;
  max-width: 660px;
  display: flex; flex-direction: column; gap: 0.75em;
  animation: fadeUp 0.8s 0.45s var(--ease) both;
  padding: 0 0.5em;
}

.step {
  display: flex; align-items: flex-start; gap: 1em;
  background: rgba(255,255,255,0.14);
  border: 1px solid rgba(255,255,255,0.22);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  padding: clamp(0.75em, 1.8vw, 1.1em) clamp(1em, 2vw, 1.4em);
  transition: background var(--t-fast), transform var(--t-fast);
}

.step:hover {
  background: rgba(255,255,255,0.22);
  transform: translateX(4px);
}

.step-num {
  display: flex; align-items: center; justify-content: center;
  width: clamp(28px, 4vw, 36px); height: clamp(28px, 4vw, 36px);
  min-width: clamp(28px, 4vw, 36px);
  background: var(--coral);
  border-radius: 50%;
  font-family: 'Outfit', sans-serif;
  font-weight: 800; font-size: clamp(0.78em, 1.2vw, 0.9em);
  color: var(--white);
  box-shadow: 0 4px 12px rgba(255,99,71,0.4);
}

.step p { font-size: clamp(0.82em, 1.5vw, 0.95em); color: rgba(255,255,255,0.93); line-height: 1.5; }
.step strong { font-weight: 700; color: var(--white); }

/* ===== DOWNLOAD SECTION ===== */
.features {
  padding: clamp(4em, 8vw, 6.5em) clamp(1em, 5vw, 3em);
  background: var(--off-white);
  position: relative; overflow: hidden;
}

.features::before {
  content: '';
  position: absolute; top: -2px; left: 0; right: 0; height: 60px;
  background: var(--grad-brand);
  clip-path: ellipse(60% 100% at 50% 0%);
  opacity: 0.18; pointer-events: none;
}

.section-intro {
  text-align: center;
  margin-bottom: clamp(1.5em, 4vw, 2.5em);
}

.section-label {
  display: inline-block;
  font-size: clamp(0.68em, 1vw, 0.78em); font-weight: 700;
  letter-spacing: 2.5px; text-transform: uppercase;
  color: var(--cyan); margin-bottom: 0.5em;
  padding: 0.3em 1em;
  background: rgba(0,161,206,0.1); border-radius: 50px;
}

.section-title {
  font-size: clamp(1.8em, 4.5vw, 3.4em); font-weight: 800;
  color: var(--coral); letter-spacing: -1px;
}

.features .container {
  max-width: 1300px; margin: 0 auto;
  display: flex; justify-content: center;
}

.feature-item {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: clamp(1.8em, 3.5vw, 2.8em) clamp(1.4em, 3vw, 2.2em);
  text-align: center;
  width: clamp(260px, 40vw, 380px);
  border: 1px solid transparent;
  transition: transform var(--t-med), box-shadow var(--t-med);
  will-change: transform;
}

.feature-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(0,161,206,0.2);
}

.icon-wrap {
  width: clamp(60px, 8vw, 80px); height: clamp(60px, 8vw, 80px);
  background: linear-gradient(135deg, rgba(0,161,206,0.12), rgba(0,161,206,0.05));
  border-radius: 20px;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 1.1em;
  font-size: clamp(1.8em, 3vw, 2.4em);
  transition: transform var(--t-med);
}
.feature-item:hover .icon-wrap { transform: scale(1.08) rotate(-3deg); }

.feature-item h3 {
  font-size: clamp(0.95em, 1.5vw, 1.15em); font-weight: 700;
  color: var(--cyan-dark); margin-bottom: 0.5em;
}

.feature-item p {
  font-size: clamp(0.8em, 1.2vw, 0.9em);
  color: var(--gray-500); line-height: 1.6; margin-bottom: 1.2em;
}

.download-btn {
  display: inline-flex; align-items: center; gap: 0.5em;
  background: var(--cyan); color: var(--white);
  padding: 0.65em 1.8em; border-radius: 50px;
  text-decoration: none; font-weight: 700;
  font-size: clamp(0.82em, 1.2vw, 0.95em);
  box-shadow: 0 4px 14px rgba(0,161,206,0.35);
  transition: background var(--t-fast), transform var(--t-fast), box-shadow var(--t-fast);
}
.download-btn:hover {
  background: var(--coral);
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(255,99,71,0.38);
}

/* ===== FOOTER ===== */
footer {
  background: var(--grad-footer);
  color: var(--white); text-align: center;
  padding: clamp(2.5em, 5vw, 4em) 1em;
  position: relative;
}
footer::before {
  content: ''; position: absolute; inset: 0;
  background: rgba(0,0,0,0.06); pointer-events: none;
}
footer .container { position: relative; z-index: 1; max-width: 1200px; margin: 0 auto; padding: 0 1em; }
footer .footer-brand {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(1.1em, 2vw, 1.5em); font-weight: 800; letter-spacing: 2px; margin-bottom: 0.3em;
}
footer p { margin: 0.4em 0; font-size: clamp(0.8em, 1.2vw, 0.92em); opacity: 0.88; }
footer .divider { width: 40px; height: 2px; background: rgba(255,255,255,0.4); border-radius: 2px; margin: 1em auto; }

footer .social-icons {
  display: flex; justify-content: center; flex-wrap: wrap; gap: 1em; margin: 0.8em 0 1.2em;
}
footer .social-icons a {
  color: var(--white); text-decoration: none;
  font-size: clamp(0.82em, 1.3vw, 0.98em);
  display: flex; align-items: center; gap: 0.5em;
  background: rgba(255,255,255,0.14); border: 1px solid rgba(255,255,255,0.2);
  padding: 0.45em 1.1em; border-radius: 50px; backdrop-filter: blur(6px);
  transition: background var(--t-fast), transform var(--t-fast);
}
footer .social-icons a:hover { background: rgba(255,255,255,0.26); transform: translateY(-2px); }
footer .social-icons i { font-size: 1em; }

/* ===== TABLET ≤1024px ===== */
@media (max-width: 1024px) { header nav ul { gap: 0.7em; } }

/* ===== MOBILE ≤768px ===== */
@media (max-width: 768px) {
  header { padding: 1em 0; }
  header nav { display: none; }
  .hamburger { display: flex; }
  .mobile-nav { display: flex; }

  .hero {
    min-height: auto;
    padding: clamp(5.5em, 14vw, 7em) 1.2em clamp(3em, 7vw, 5em);
  }

  .hero h2 { font-size: clamp(1.4em, 6.5vw, 2.4em); }

  .hero .qr-code { width: clamp(130px, 46vw, 200px); height: clamp(130px, 46vw, 200px); }

  .features { padding: 3.5em 1em; }
  .feature-item { width: min(340px, 88vw); }

  footer .social-icons { flex-direction: column; align-items: center; }
}

/* ===== SMALL MOBILE ≤480px ===== */
@media (max-width: 480px) {
  .hero { padding: 5.5em 1em 3em; }
  .hero h2 { font-size: clamp(1.2em, 7vw, 1.8em); }
  .hero .qr-code { width: clamp(110px, 54vw, 175px); height: clamp(110px, 54vw, 175px); }
  .step p { font-size: 0.86em; }
  .feature-item { width: 92vw; }
}

/* ===== TINY ≤360px ===== */
@media (max-width: 360px) {
  header h1 { font-size: 0.82em; }
  .hero h2 { font-size: 1.2em; }
}