/* Base styles */
:root {
  --primary: #3b82f6;
  --secondary: #23272f;
  --accent: #38bdf8;
  --bg: #10131a;
  --text: #f3f4f6;
  --muted: #8b98b1;
}

* { 
  box-sizing: border-box; 
  margin: 0; 
  padding: 0; 
}

body {
  font-family: 'Inter', 'Roboto', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.7;
  padding-top: 0;
  transition: background 0.3s, color 0.3s;
  font-size: 1.08rem;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Inter', Arial, sans-serif;
  font-weight: 700;
  letter-spacing: 0.01em;
}

/* Light Theme */
body.light-theme {
  --primary: #2563eb;
  --secondary: #f3f4f6;
  --accent: #00bfae;
  --bg: #ffffff;
  --text: #1a1a1a;
  --muted: #4b5563;
  background: var(--bg);
  color: var(--text);
}

/* Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--secondary);
  padding: 1rem 2rem;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 12px rgba(59,130,246,0.10);
  border-bottom: 1px solid rgba(59,130,246,0.08);
  backdrop-filter: blur(6px);
  transition: background 0.2s;
}

.logo {
  display: flex;
  align-items: center;
  font-weight: bold;
  font-size: 1.5rem;
  color: var(--primary);
}

.logo img {
  height: 40px;
  margin-right: 0.5rem;
  border-radius: 50%;
  object-fit: cover;
}

.logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--primary);
  font-size: 1.5rem;
  font-weight: 700;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 2rem;
}

.nav-links a {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

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

.nav-links a:focus {
  outline: none;
}

/* Theme Toggle */
.theme-toggle-btn {
  background: none;
  border: none;
  cursor: pointer;
  margin-left: 1.5rem;
  font-size: 1.7rem;
  color: var(--primary);
  transition: color 0.2s, transform 0.2s;
  outline: none;
  display: flex;
  align-items: center;
}

.theme-toggle-btn:hover, 
.theme-toggle-btn:focus {
  color: var(--accent);
  transform: scale(1.15) rotate(-10deg);
  outline: none;
  box-shadow: none;
}

#theme-icon {
  pointer-events: none;
}

/* Hero */
.hero {
  text-align: center;
}

.section-title {
  text-align: center;
  color: var(--primary);
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
  letter-spacing: 1px;
}

.section-subtitle {
  text-align: center;
  color: var(--accent);
  font-size: 1.2rem;
  margin-bottom: 2.5rem;
}

/* FAQ Section */
#faqs {
  background: linear-gradient(120deg, var(--secondary) 80%, var(--bg) 100%);
  padding: 4rem 1rem 3rem 1rem;
}

.faq-card {
  background: var(--secondary);
  border-radius: 14px;
  box-shadow: 0 2px 12px rgba(59,130,246,0.07);
  margin-bottom: 1.2rem;
  transition: box-shadow 0.2s, transform 0.2s, background 0.2s;
  padding: 0.2rem 0;
}

.faq-card:focus-within, .faq-card.open {
  box-shadow: 0 4px 16px rgba(59,130,246,0.13);
  transform: translateY(-1px) scale(1.01);
}

.faq-toggle {
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  cursor: pointer;
  font-family: inherit;
  font-size: 1.08rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.5rem;
  border-radius: 14px;
  transition: background 0.2s;
  color: var(--text);
}

.faq-toggle:focus {
  outline: none;
}

.faq-toggle span.font-semibold {
  font-size: 1.08rem;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.01em;
}

.faq-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 50%;
  color: var(--primary);
  font-size: 1.3rem;
  margin-left: 1rem;
  transition: transform 0.3s cubic-bezier(.4,2,.6,1), color 0.2s;
}

.faq-toggle[aria-expanded="true"] .faq-icon {
  transform: rotate(180deg) scale(1.08);
  color: var(--accent);
}

.faq-answer {
  transition: max-height 0.3s cubic-bezier(.4,2,.6,1), opacity 0.3s, padding 0.2s;
  opacity: 1;
  max-height: 500px;
  padding: 0 1.5rem 1.1rem 1.5rem;
  color: var(--muted);
  font-size: 1.01rem;
}

.faq-answer.hidden {
  opacity: 0;
  max-height: 0;
  padding-bottom: 0 !important;
  overflow: hidden;
}

/* Privacy/Policy Pages */
.privacy-section {
  background: var(--secondary);
  padding: 3rem 1rem 2.5rem 1rem;
  border-radius: 18px;
  box-shadow: 0 2px 16px rgba(59,130,246,0.04);
  margin: 2.5rem auto 0 auto;
}

.privacy-container {
  max-width: 900px;
  margin: 0 auto;
  color: var(--text);
}

.privacy-section .section-title {
  color: var(--primary);
  font-size: 2.1rem;
  margin-bottom: 1.2rem;
  text-align: center;
}

.privacy-date {
  color: var(--muted);
  font-size: 1rem;
  margin-bottom: 1.2rem;
  text-align: center;
}

.privacy-section h3 {
  color: var(--primary);
  font-size: 1.15rem;
  margin-top: 2rem;
  margin-bottom: 0.7rem;
  font-weight: 600;
}

.privacy-section ul {
  margin-left: 1.2rem;
  margin-bottom: 1.2rem;
  color: var(--muted);
  font-size: 1.01rem;
  line-height: 1.7;
}

.privacy-section p {
  margin-bottom: 1.1rem;
  font-size: 1.05rem;
  color: var(--text);
}

.privacy-section a {
  color: var(--primary);
  text-decoration: underline;
}

.privacy-section hr {
  border: none;
  border-top: 1px solid var(--muted);
  margin: 2rem 0;
}

/* Footer */
footer {
  background: var(--secondary);
  color: var(--muted);
  padding: 2rem 1rem 1rem 1rem;
  text-align: center;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2.5rem 1rem 1rem 1rem;
  max-width: 1200px;
  margin: 0 auto;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  margin-bottom: 1.5rem;
}

.footer-logo-img {
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 2px 8px rgba(59,130,246,0.10);
  background: #fff;
}

.footer-brand-text {
  display: flex;
  flex-direction: column;
}

.footer-brand-title {
  font-family: 'Inter', Arial, sans-serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary);
}

.footer-tagline {
  font-size: 1.05rem;
  color: var(--accent);
  font-weight: 500;
}

.footer-columns {
  display: flex;
  gap: 3rem;
  justify-content: center;
  width: 100%;
  margin-bottom: 1.2rem;
  flex-wrap: wrap;
}

.footer-col {
  display: flex;
  flex-direction: column;
  min-width: 140px;
  gap: 0.4rem;
}

.footer-col h4 {
  color: var(--primary);
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.footer-col a {
  color: var(--text);
  text-decoration: none;
  font-size: 1rem;
  margin-bottom: 0.2rem;
  transition: color 0.18s;
}

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

.footer-bottom {
  text-align: center;
  color: var(--muted);
  font-size: 1rem;
  margin-top: 1.2rem;
  letter-spacing: 0.2px;
}

.footer-bottom a {
  color: inherit;
  text-decoration: underline;
}

.footer-privacy {
  text-align: center;
  padding: 2rem 0 1rem 0;
  background: var(--secondary);
  color: var(--muted);
  font-size: 1rem;
}

.footer-privacy a {
  color: inherit;
  text-decoration: underline;
}

/* Floating Buttons */
.floating-whatsapp {
  position: fixed;
  left: 24px;
  bottom: 24px;
  text-decoration: none;
  background: #25D366;
  border: 3px solid #fff;
  box-shadow: 0 4px 16px rgba(37,211,102,0.18), 0 2px 8px rgba(0,0,0,0.12);
  z-index: 2000;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s;
}

.floating-whatsapp:hover {
  transform: scale(1.12);
  box-shadow: 0 0 0 6px rgba(37,211,102,0.18), 0 4px 16px rgba(37,211,102,0.18);
}

.floating-whatsapp .wa-icon svg {
  width: 36px;
  height: 36px;
  display: block;
}

/* Section Spacing */
section {
  margin-bottom: 3.5rem;
  padding-top: 2.5rem;
  padding-bottom: 2.5rem;
}

#home, #about, #user-guide, #download, #developers, #contact {
  scroll-margin-top: 84px;
}

/* Focus States */
a:focus, button:focus, input:focus, textarea:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Animations */
.preload {
  opacity: 0 !important;
  transition: none !important;
}

.fade-in {
  animation: fadeInPage 0.5s ease;
}

.fade-out {
  animation: fadeOutPage 0.4s ease forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInPage {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeOutPage {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* Light Theme Overrides */
.light-theme .download-section-home {
  background: var(--secondary);
}

.light-theme .hero {
  background: linear-gradient(135deg, #e3f0ff 60%, #fafdff 100%);
}

.light-theme .about-section-home {
  background: linear-gradient(120deg, #fafdff 80%, #e3f0ff 100%);
}

.light-theme .contributors-box {
  background: #f3f4f6;
  color: #1a1a1a;
  box-shadow: 0 2px 16px rgba(59,130,246,0.07);
}

/* ========================================
   RESPONSIVE DESIGN - MOBILE FIRST
   ======================================== */

/* Tablets and Small Desktops (max-width: 1200px) */
@media (max-width: 1200px) {
  .about-columns {
    gap: 2rem;
  }
  
  .about-col {
    max-width: 45%;
  }
  
  .video-grid {
    gap: 2rem;
  }
}

/* Tablets (max-width: 1000px) */
@media (max-width: 1000px) {
  body {
    font-size: 1.05rem;
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .tagline {
    font-size: 1.2rem;
  }
  
  .about-columns {
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
  }
  
  .about-col {
    max-width: 95%;
  }
  
  .download-buttons {
    flex-direction: column;
    gap: 1rem;
    align-items: center;
  }
  
  .download-buttons .cta-btn {
    min-width: 250px;
  }
  
  .video-grid {
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
  }
  
  .video-item {
    max-width: 95%;
  }
  
  .dev-profiles {
    gap: 2rem;
  }
  
  .contact-content {
    flex-direction: column;
    gap: 1.5rem;
  }
  
  .contact-info,
  .contact-form {
    max-width: 100%;
  }
  
  .footer-columns {
    flex-direction: column;
    gap: 1.5rem;
    align-items: center;
  }
}

/* Mobile Landscape and Small Tablets (max-width: 900px) */
@media (max-width: 900px) {
  .navbar {
    padding: 1rem 1.5rem;
  }
  
  .nav-links {
    gap: 1.5rem;
  }
  
  .hero {
    padding: 4rem 1rem 2.5rem 1rem;
  }
  
  .hero-content {
    flex-direction: column;
    align-items: center;
    min-height: 0;
  }
  
  .hero-text {
    flex-basis: auto;
    padding-right: 0;
    width: 100%;
  }
  
  .hero-image {
    position: static;
    width: 100%;
    height: auto;
    max-width: 100%;
    margin-top: 2rem;
    justify-content: center;
    pointer-events: auto;
  }
  
  .hero-image img {
    width: 100%;
    height: auto;
    max-height: 260px;
    object-fit: contain;
  }
  
  .about-section-home,
  .download-section-home {
    padding: 3rem 1rem 2rem 1rem;
  }
  
  section {
    padding-top: 1.5rem;
    padding-bottom: 1.5rem;
    margin-bottom: 2rem;
  }
  
  .dev-profiles {
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
  }
  
  .dev-profile {
    max-width: 95%;
  }
  
  .contributors-box {
    padding: 2rem 1.5rem;
  }
}

/* Mobile Portrait (max-width: 600px) */
@media (max-width: 600px) {
  body {
    padding-top: 110px;
    font-size: 1rem;
  }
  
  .navbar {
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
  }
  
  .logo {
    font-size: 1.3rem;
  }
  
  .logo img {
    height: 35px;
  }
  
  .nav-links {
    flex-direction: column;
    gap: 0.8rem;
    align-items: center;
    width: 100%;
  }
  
  .nav-links li {
    width: 100%;
    text-align: center;
  }
  
  .theme-toggle-btn {
    margin-left: 0;
    font-size: 1.5rem;
  }
  
  .hero {
    padding: 3rem 0.5rem 2rem 0.5rem;
  }
  
  .hero h1 {
    font-size: 2rem;
    letter-spacing: 1px;
  }
  
  .tagline {
    font-size: 1.1rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    gap: 0.8rem;
  }
  
  .cta-btn {
    font-size: 1rem;
    padding: 0.8rem 1.5rem;
    min-width: 200px;
  }
  
  .intro {
    font-size: 1rem;
    padding: 0 0.5rem;
  }
  
  .about-section-home,
  .download-section-home {
    padding: 2.2rem 0.5rem 1.5rem 0.5rem;
  }
  
  .about-content,
  .download-content {
    padding: 0 0.2rem;
  }
  
  .about-section-home h2,
  .download-section-home h2,
  .section-title {
    font-size: 1.8rem;
  }
  
  .about-tagline,
  .download-tagline,
  .section-subtitle {
    font-size: 1rem;
  }
  
  .about-col {
    padding: 1.5rem 1rem;
    min-width: 90%;
  }
  
  .download-buttons .cta-btn {
    min-width: 90%;
  }
  
  .qr-section-home {
    padding: 1.2rem 1.5rem;
  }
  
  .video-item {
    min-width: 90%;
    padding: 1rem 0.8rem;
  }
  
  .tutorial-video h2 {
    font-size: 1.8rem;
  }
  
  .dev-hero h1 {
    font-size: 1.8rem;
  }
  
  .dev-profile {
    min-width: 90%;
    padding: 1.8rem 1.2rem;
  }
  
  .dev-photo {
    width: 80px;
    height: 80px;
  }
  
  .contributors-box {
    padding: 1.5rem 1rem;
  }
  
  .contributors-box h2 {
    font-size: 1.5rem;
  }
  
  .contributors-box h3 {
    font-size: 1.1rem;
  }
  
  .contact-main .container {
    padding: 2rem 0.5rem;
  }
  
  .contact-info,
  .contact-form {
    padding: 1.5rem 1rem;
    min-width: 90%;
  }
  
  .social-links {
    flex-direction: column;
    gap: 0.8rem;
  }
  
  .faq-card {
    padding: 0.1rem 0;
    border-radius: 12px;
  }
  
  .faq-toggle {
    font-size: 0.98rem;
    padding: 0.9rem 0.7rem;
    border-radius: 12px;
  }
  
  .faq-icon {
    width: 1.2rem;
    height: 1.2rem;
    font-size: 1rem;
    margin-left: 0.6rem;
  }
  
  .faq-answer {
    font-size: 0.95rem;
    padding: 0 0.7rem 0.8rem 0.7rem;
  }
  
  .privacy-section {
    padding: 1.5rem 0.5rem 1.2rem 0.5rem;
    border-radius: 12px;
  }
  
  .privacy-container {
    max-width: 98vw;
  }
  
  .privacy-section .section-title {
    font-size: 1.5rem;
  }
  
  .privacy-section h3 {
    font-size: 1.1rem;
    margin-top: 1.2rem;
  }
  
  .privacy-section ul,
  .privacy-section p {
    font-size: 0.98rem;
  }
  
  .footer-content {
    padding: 2rem 0.5rem 1rem 0.5rem;
  }
  
  .footer-brand {
    flex-direction: column;
    gap: 0.8rem;
    text-align: center;
  }
  
  .footer-brand-title {
    font-size: 1.2rem;
  }
  
  .footer-tagline {
    font-size: 0.95rem;
  }
  
  .footer-col {
    align-items: center;
  }
  
  .footer-bottom {
    font-size: 0.9rem;
  }
  
  .floating-whatsapp {
    width: 50px;
    height: 50px;
    left: 16px;
    bottom: 16px;
  }
  
  .floating-whatsapp .wa-icon svg {
    width: 30px;
    height: 30px;
  }
  
  section {
    padding-top: 1rem;
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
  }
}

/* Extra Small Mobile (max-width: 400px) */
@media (max-width: 400px) {
  body {
    font-size: 0.95rem;
  }
  
  .hero h1 {
    font-size: 1.7rem;
  }
  
  .cta-btn {
    font-size: 0.95rem;
    padding: 0.7rem 1.2rem;
    min-width: 180px;
  }
  
  .about-section-home h2,
  .download-section-home h2,
  .section-title {
    font-size: 1.5rem;
  }
  
  .contact-info,
  .contact-form {
    padding: 1.2rem 0.8rem;
  }
  
  .privacy-section {
    padding: 1.2rem 0.3rem 1rem 0.3rem;
  }
  
  .contributors-box {
    padding: 1.2rem 0.8rem;
  }
};
  padding: 5rem 1rem 3rem 1rem;
  background: linear-gradient(135deg, var(--secondary) 60%, var(--primary) 100%);
  position: relative;
}

.hero h1 {
  font-size: 3rem;
  color: var(--primary);
  margin-bottom: 0.5rem;
  letter-spacing: 2px;
}

.tagline {
  font-size: 1.3rem;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.cta-btn {
  display: inline-block;
  background: linear-gradient(90deg, var(--primary) 60%, var(--accent) 100%);
  color: var(--secondary);
  padding: 1rem 2.2rem;
  border-radius: 32px;
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  text-decoration: none;
  box-shadow: 0 4px 24px 0 rgba(59,130,246,0.13);
  transition: background 0.2s, color 0.2s, box-shadow 0.2s, transform 0.2s;
  border: none;
  outline: none;
  cursor: pointer;
}

.cta-btn:hover, 
.cta-btn:focus {
  background: linear-gradient(90deg, var(--accent) 60%, var(--primary) 100%);
  color: var(--bg);
  box-shadow: 0 8px 32px 0 rgba(59,130,246,0.18);
  transform: translateY(-2px) scale(1.03);
  outline: 2px solid var(--primary);
}

.intro {
  max-width: 600px;
  margin: 1.5rem auto 0 auto;
  color: var(--muted);
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.hero-content {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  height: 100%;
  min-height: 420px;
  position: relative;
  z-index: 1;
}

.hero-text {
  flex: 0 1 48%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding-right: 3rem;
  z-index: 1;
}

.hero-image {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  width: 52%;
  height: 100%;
  max-width: none;
  z-index: 0;
  pointer-events: none;
}

.hero-image img {
  width: 100%;
  height: 100vh;
  max-height: 100vh;
  object-fit: contain;
  border: none !important;
  box-shadow: none !important;
  outline: none !important;
  background: transparent !important;
  display: block;
  max-width: 100%;
  z-index: 0;
}

/* Cards */
.card, .about-col, .dev-profile, .faq-card {
  box-shadow: 0 2px 16px rgba(59,130,246,0.07);
  border-radius: 18px;
  background: var(--secondary);
  transition: box-shadow 0.2s, transform 0.2s;
}

.card:hover, .about-col:hover, .dev-profile:hover, .faq-card:hover {
  box-shadow: 0 8px 32px rgba(59,130,246,0.13);
  transform: translateY(-4px) scale(1.02);
}

/* About Section */
.about-section-home {
  background: linear-gradient(120deg, var(--bg) 80%, #1a1f3c 100%);
  padding: 4rem 1rem 3rem 1rem;
  margin-top: -2rem;
  box-shadow: 0 4px 32px rgba(0,255,193,0.04);
}

.about-content {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.about-section-home h2 {
  color: var(--primary);
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
  letter-spacing: 1px;
}

.about-tagline {
  color: var(--accent);
  font-size: 1.2rem;
  margin-bottom: 2.5rem;
}

.about-columns {
  display: flex;
  gap: 2.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

.about-col {
  background: var(--secondary);
  border-radius: 18px;
  box-shadow: 0 2px 16px rgba(0,255,193,0.07);
  padding: 2rem 1.5rem;
  min-width: 260px;
  max-width: 350px;
  flex: 1 1 300px;
  margin-bottom: 1.5rem;
  text-align: left;
  position: relative;
  overflow: hidden;
  color: #fff !important;
}

.about-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: blur(4px) brightness(0.5);
  z-index: 0;
  pointer-events: none;
}

.about-col > *:not(.about-bg) {
  position: relative;
  z-index: 1;
}

.about-col h3 {
  color: #3b82f6 !important;
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.about-col ul {
  margin-left: 1.2rem;
  color: #fff !important;
  font-size: 1rem;
}

.about-col ul li, .about-col p {
  color: #fff !important;
}

.about-col strong {
  color: #3b82f6 !important;
}

/* Download Section */
.download-section-home {
  background: linear-gradient(120deg, #1a1f3c 60%, var(--bg) 100%);
  padding: 4rem 1rem 3rem 1rem;
  box-shadow: 0 4px 32px rgba(0,255,193,0.04);
  margin-bottom: 2rem;
}

.download-content {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.download-section-home h2 {
  color: var(--primary);
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.download-tagline {
  color: var(--accent);
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

.download-buttons {
  display: flex;
  gap: 2rem;
  justify-content: center;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.download-buttons .cta-btn {
  min-width: 200px;
  font-size: 1.08rem;
  margin-bottom: 0.5rem;
}

.qr-section-home {
  margin-top: 1.5rem;
  background: var(--secondary);
  border-radius: 14px;
  display: inline-block;
  padding: 1.5rem 2rem;
  box-shadow: 0 2px 12px rgba(0,255,193,0.07);
}

.qr-section-home h3 {
  color: var(--primary);
  margin-bottom: 0.7rem;
}

.qr-img {
  height: 90px;
  margin-bottom: 0.7rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,255,193,0.08);
}

/* User Guide Section */
.user-guide-section {
  padding: 3rem 1rem;
  background: var(--bg);
  text-align: center;
  scroll-margin-top: 84px;
}

.user-guide-section h2 {
  color: var(--primary);
  font-size: 2rem;
  margin-bottom: 1.5rem;
  letter-spacing: 1px;
}

.user-guide-placeholder {
  max-width: 800px;
  margin: 0 auto;
  padding: 3rem 2rem;
  background: var(--secondary);
  border-radius: 16px;
  box-shadow: 0 2px 12px rgba(59,130,246,0.07);
  color: var(--muted);
}

/* Tutorial Video */
.tutorial-video {
  padding: 3rem 1rem;
  background: var(--secondary);
  text-align: center;
  scroll-margin-top: 90px;
}

.tutorial-video h2 {
  color: var(--primary);
  margin-bottom: 1.5rem;
  font-size: 2rem;
}

.video-grid {
  display: flex;
  gap: 2.5rem;
  justify-content: center;
  align-items: flex-start;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.video-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--bg);
  border-radius: 14px;
  box-shadow: 0 2px 12px rgba(0,255,193,0.07);
  padding: 1.2rem 1rem 1.5rem 1rem;
  min-width: 320px;
  max-width: 500px;
  flex: 1 1 320px;
}

.video-container {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: 12px;
  margin-bottom: 1rem;
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 12px;
}

.video-caption {
  color: var(--primary);
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 0.5rem;
  letter-spacing: 0.5px;
}

/* Developer Section */
.dev-main {
  background: var(--bg);
  min-height: 100vh;
  padding-bottom: 0 !important;
  margin-bottom: 0;
  scroll-margin-top: 84px;
}

.dev-hero {
  text-align: center;
  padding: 3rem 1rem 1.5rem 1rem;
}

.dev-hero h1 {
  color: var(--primary);
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
}

.dev-hero .tagline {
  color: var(--accent);
  font-size: 1.1rem;
}

.dev-section {
  max-width: 1200px;
  margin: 0 auto 2.5rem auto;
  padding: 0 1rem;
}

.dev-profiles {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
  justify-content: center;
}

.dev-profile {
  background: var(--secondary);
  border-radius: 18px;
  box-shadow: 0 2px 16px rgba(0,255,193,0.07);
  padding: 2.2rem 1.5rem 1.5rem 1.5rem;
  min-width: 240px;
  max-width: 300px;
  flex: 1 1 260px;
  text-align: center;
  transition: transform 0.18s, box-shadow 0.18s;
}

.dev-profile:hover {
  transform: translateY(-8px) scale(1.04);
  box-shadow: 0 6px 32px rgba(0,255,193,0.13);
}

.dev-photo {
  width: 90px;
  height: 90px;
  object-fit: cover;
  border-radius: 50%;
  margin-bottom: 1rem;
  border: 3px solid var(--primary);
  box-shadow: 0 2px 8px rgba(0,255,193,0.08);
}

.dev-profile h3 {
  color: var(--primary);
  margin-bottom: 0.3rem;
  font-size: 1.15rem;
}

.dev-profile p {
  color: var(--muted);
  margin-bottom: 0.7rem;
  font-size: 1rem;
}

.dev-links {
  margin-top: 0.5rem;
}

.dev-links a {
  color: var(--accent);
  text-decoration: none;
  margin: 0 0.4rem;
  font-weight: 500;
  transition: color 0.18s;
}

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

/* Contributors Box */
.contributors-box {
  background: linear-gradient(120deg, var(--secondary) 80%, var(--bg) 100%);
  border-radius: 18px;
  box-shadow: 0 2px 16px rgba(59,130,246,0.07);
  padding: 2.5rem 2rem;
  margin: 2rem auto 0 auto;
  max-width: 900px;
  color: var(--text);
}

.contributors-box h2 {
  color: var(--primary);
  margin-bottom: 1rem;
}

.contributors-box h3 {
  color: var(--primary);
  margin-top: 1.5rem;
  margin-bottom: 0.7rem;
}

.contributors-box ul {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

.contributors-box a {
  color: var(--accent);
  text-decoration: underline;
}

.contributors-box blockquote {
  border-left: 3px solid var(--primary);
  padding-left: 1rem;
  margin: 1.5rem 0;
  font-style: italic;
  color: var(--muted);
}

/* Contact Section */
.contact-main {
  background: var(--bg);
  min-height: 100vh;
  padding-top: 0.5rem !important;
  scroll-margin-top: 84px;
}

.contact-main .container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 2.5rem 1rem 2rem 1rem;
}

.contact-content {
  display: flex;
  gap: 3rem;
  justify-content: space-between;
  align-items: flex-start;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}

.contact-info {
  flex: 1 1 320px;
  background: var(--secondary);
  border-radius: 16px;
  box-shadow: 0 2px 12px rgba(59,130,246,0.07);
  padding: 2rem 1.5rem;
  color: var(--text);
  min-width: 260px;
  margin-bottom: 1.5rem;
}

.contact-info h3 {
  color: var(--primary);
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

.contact-info p, .contact-info a {
  color: var(--text);
  font-size: 1rem;
  margin-bottom: 0.7rem;
  text-decoration: none;
}

.social-links {
  display: flex;
  gap: 1.2rem;
  margin-top: 1.2rem;
  flex-wrap: wrap;
}

.social-link {
  color: var(--primary);
  font-weight: 600;
  font-size: 1.1rem;
  text-decoration: none;
  transition: color 0.2s;
}

.social-link:hover {
  color: var(--accent);
}

.social-media-home {
  margin-top: 2.2rem;
  display: flex;
  justify-content: center;
  gap: 2.2rem;
  flex-wrap: wrap;
}

.social-media-home a {
  color: var(--primary) !important;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  transition: color 0.2s, transform 0.2s;
}

.social-media-home a:hover {
  color: var(--accent) !important;
  transform: scale(1.1);
}

/* Contact Form */
.contact-form {
  flex: 1 1 380px;
  background: var(--secondary);
  border-radius: 16px;
  box-shadow: 0 2px 12px rgba(59,130,246,0.07);
  padding: 2rem 1.5rem;
  min-width: 260px;
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.contact-form label {
  color: var(--primary);
  font-weight: 500;
  margin-bottom: 0.2rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.7rem 1rem;
  border: none;
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  box-shadow: 0 1px 4px rgba(59,130,246,0.04);
  transition: box-shadow 0.18s;
  font-family: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--primary);
}

.contact-form button.cta-btn {
  width: 100%;
  margin-top: 0.5rem;
  font-size: 1.1rem;
}

#form-status {
  margin-top: 1rem;
  color: var(--accent);
  font-size: 1rem;
  min-height: 1.2em;
  text-align: center