/* ========== CSS RESET & GLOBAL STYLES ========== */
:root {
  /* Color Palette */
  --primary: #4361ee;
  --primary-dark: #3a56d4;
  --primary-light: #e6ebff;
  --secondary: #7209b7;
  --accent: #f72585;
  --success: #4cc9f0;

  /* Dark Theme */
  --dark-bg: #0d1117;
  --dark-surface: #161b22;
  --dark-border: #30363d;
  --dark-text: #c9d1d9;
  --dark-text-secondary: #8b949e;

  /* Light Theme */
  --light-bg: #ffffff;
  --light-surface: #f8f9fa;
  --light-border: #e1e4e8;
  --light-text: #24292e;
  --light-text-secondary: #6a737d;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #4361ee 0%, #3a0ca3 100%);
  --gradient-light: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  --gradient-dark: linear-gradient(135deg, #0d1117 0%, #161b22 100%);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Layout */
  --header-height: 80px;
  --container-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", sans-serif;
  background-color: var(--light-bg);
  color: var(--light-text);
  line-height: 1.6;
  transition:
    background-color 0.3s,
    color 0.3s;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

body.dark-theme {
  background-color: var(--dark-bg);
  color: var(--dark-text);
}

/* ========== NAVIGATION ========== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--light-border);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s;
}

.dark-theme .navbar {
  background: rgba(13, 17, 23, 0.95);
  border-bottom-color: var(--dark-border);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.logo-text h1 {
  font-size: 1.4rem;
  font-weight: 700;
  margin: 0;
  color: var(--primary);
}

.logo-tagline {
  font-size: 0.85rem;
  color: var(--light-text-secondary);
  margin: 0;
}

.dark-theme .logo-tagline {
  color: var(--dark-text-secondary);
}

.nav-menu {
  display: flex;
  gap: 2rem;
  margin-left: 3rem;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  color: var(--light-text);
  text-decoration: none;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all 0.2s;
}

.dark-theme .nav-link {
  color: var(--dark-text);
}

.nav-link:hover {
  background: var(--light-surface);
  color: var(--primary);
}

.dark-theme .nav-link:hover {
  background: var(--dark-surface);
}

.nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
}

.dark-theme .nav-link.active {
  background: rgba(67, 97, 238, 0.2);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 15px;
}

.theme-toggle {
  width: 40px;
  height: 40px;
  background: var(--light-surface);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--light-text);
  transition: all 0.3s;
}

.dark-theme .theme-toggle {
  background: var(--dark-surface);
  color: var(--dark-text);
}

.theme-toggle:hover {
  transform: rotate(30deg);
  background: var(--primary-light);
  color: var(--primary);
}

.mobile-menu-btn {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--light-surface);
  color: var(--light-text);
  border: none;
  cursor: pointer;
  font-size: 1.3rem;
}

.dark-theme .mobile-menu-btn {
  background: var(--dark-surface);
  color: var(--dark-text);
}

/* ========== MOBILE MENU ========== */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -320px;
  width: 320px;
  height: 100vh;
  background: var(--light-bg);
  box-shadow: var(--shadow-lg);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  transition: right 0.3s;
}

.dark-theme .mobile-menu {
  background: var(--dark-bg);
}

.mobile-menu.active {
  right: 0;
}

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px;
  border-bottom: 1px solid var(--light-border);
}

.dark-theme .mobile-menu-header {
  border-bottom-color: var(--dark-border);
}

.mobile-menu-header .logo {
  flex: 1;
}

.close-mobile-menu {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--light-surface);
  border: none;
  color: var(--light-text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.dark-theme .close-mobile-menu {
  background: var(--dark-surface);
  color: var(--dark-text);
}

.mobile-menu-links {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 15px;
  color: var(--light-text);
  text-decoration: none;
  border-radius: var(--radius-md);
  margin-bottom: 8px;
  transition: all 0.2s;
}

.dark-theme .mobile-nav-link {
  color: var(--dark-text);
}

.mobile-nav-link:hover {
  background: var(--light-surface);
}

.dark-theme .mobile-nav-link:hover {
  background: var(--dark-surface);
}

.mobile-nav-link.active {
  background: var(--primary-light);
  color: var(--primary);
}

.dark-theme .mobile-nav-link.active {
  background: rgba(67, 97, 238, 0.2);
}

.mobile-menu-footer {
  padding: 20px;
  border-top: 1px solid var(--light-border);
}

.dark-theme .mobile-menu-footer {
  border-top-color: var(--dark-border);
}

.theme-toggle-mobile {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px;
  background: var(--light-surface);
  border-radius: var(--radius-md);
  color: var(--light-text);
  cursor: pointer;
  font-weight: 500;
}

.dark-theme .theme-toggle-mobile {
  background: var(--dark-surface);
  color: var(--dark-text);
}

/* ========== CONTAINER ========== */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ========== ABOUT PAGE SPECIFIC STYLES ========== */
.about-hero {
  background: linear-gradient(135deg, #4361ee 0%, #3a0ca3 100%);
  color: white;
  padding: 80px 0;
  text-align: center;
}

.about-hero h1 {
  font-size: 3rem;
  margin-bottom: 20px;
  font-family: "Poppins", sans-serif;
}

.about-hero p {
  font-size: 1.2rem;
  max-width: 800px;
  margin: 0 auto 30px;
  opacity: 0.9;
}

.about-content {
  padding: 80px 0;
  flex: 1;
}

.about-section {
  margin-bottom: 60px;
}

.about-section h2 {
  font-size: 2rem;
  margin-bottom: 20px;
  color: #4361ee;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: "Poppins", sans-serif;
}

.about-section p {
  font-size: 1.1rem;
  line-height: 1.8;
  color: #666;
  margin-bottom: 20px;
}

.dark-theme .about-section p {
  color: #8b949e;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.feature-card {
  background: white;
  padding: 30px;
  border-radius: 16px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  text-align: center;
  transition: transform 0.3s;
}

.dark-theme .feature-card {
  background: #161b22;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.feature-card:hover {
  transform: translateY(-10px);
}

.feature-icon {
  width: 70px;
  height: 70px;
  background: #e6ebff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.dark-theme .feature-icon {
  background: rgba(67, 97, 238, 0.1);
}

.feature-icon i {
  font-size: 2rem;
  color: #4361ee;
}

.feature-card h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
  color: #333;
  font-family: "Poppins", sans-serif;
}

.dark-theme .feature-card h3 {
  color: #c9d1d9;
}

.feature-card p {
  font-size: 0.95rem;
  color: #666;
  margin: 0;
}

.dark-theme .feature-card p {
  color: #8b949e;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.team-card {
  text-align: center;
}

.team-avatar {
  width: 150px;
  height: 150px;
  background: linear-gradient(135deg, #4361ee 0%, #3a0ca3 100%);
  border-radius: 50%;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.team-avatar i {
  font-size: 4rem;
  color: white;
}

.team-card h3 {
  font-size: 1.2rem;
  margin-bottom: 5px;
  color: #333;
  font-family: "Poppins", sans-serif;
}

.dark-theme .team-card h3 {
  color: #c9d1d9;
}

.team-card p {
  color: #666;
  margin: 0;
}

.dark-theme .team-card p {
  color: #8b949e;
}

.contact-info {
  background: #f8f9fa;
  padding: 40px;
  border-radius: 16px;
  margin-top: 40px;
}

.dark-theme .contact-info {
  background: #161b22;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 20px;
}

.contact-item i {
  font-size: 1.5rem;
  color: #4361ee;
  width: 40px;
}

.contact-item h4 {
  margin: 0 0 5px 0;
  color: #333;
  font-family: "Poppins", sans-serif;
}

.dark-theme .contact-item h4 {
  color: #c9d1d9;
}

.contact-item p {
  margin: 0;
  color: #666;
}

.dark-theme .contact-item p {
  color: #8b949e;
}

/* ========== BUTTONS ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-family: "Inter", sans-serif;
  font-weight: 500;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: all 0.3s;
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: white;
}

/* ========== LIQUID FOOTER ========== */
.footer {
  background: linear-gradient(
    135deg,
    rgba(67, 97, 238, 0.1) 0%,
    rgba(58, 12, 163, 0.1) 50%,
    rgba(114, 9, 183, 0.1) 100%
  );
  color: var(--light-text);
  padding: 50px 0 30px;
  margin-top: auto;
  width: 100%;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
  border-top: 1px solid rgba(67, 97, 238, 0.2);
}

.dark-theme .footer {
  background: linear-gradient(
    135deg,
    rgba(67, 97, 238, 0.15) 0%,
    rgba(58, 12, 163, 0.15) 50%,
    rgba(114, 9, 183, 0.15) 100%
  );
  color: var(--dark-text);
  border-top: 1px solid rgba(67, 97, 238, 0.3);
}

/* Animated liquid effect */
.footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: linear-gradient(
    90deg,
    #4361ee,
    #3a0ca3,
    #7209b7,
    #f72585,
    #4cc9f0
  );
  background-size: 400% 100%;
  animation: liquidFlow 8s linear infinite;
}

@keyframes liquidFlow {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 25px;
}

.footer-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
}

.footer-logo-icon {
  width: 70px;
  height: 70px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 20px rgba(67, 97, 238, 0.3);
  transition: transform 0.3s ease;
}

.footer-logo-icon:hover {
  transform: rotate(15deg) scale(1.05);
}

.footer-logo-icon i {
  font-size: 2.5rem;
  color: white;
}

.footer-logo-text h2 {
  font-size: 2rem;
  font-weight: 700;
  margin: 0;
  font-family: "Poppins", sans-serif;
  background: linear-gradient(135deg, #4361ee 0%, #3a0ca3 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-tagline {
  color: var(--primary);
  font-size: 1.1rem;
  font-weight: 500;
  font-style: italic;
  letter-spacing: 0.5px;
  margin: 5px 0 0 0;
}

.footer-copyright {
  padding-top: 25px;
  border-top: 1px solid rgba(67, 97, 238, 0.2);
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
}

.footer-copyright-text {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--light-text-secondary);
}

.dark-theme .footer-copyright-text {
  color: var(--dark-text-secondary);
}

.copyright-line {
  font-size: 1rem;
  font-weight: 500;
  color: var(--primary);
  margin-bottom: 8px;
}

.developer-credit {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(67, 97, 238, 0.1);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(67, 97, 238, 0.3);
  color: var(--primary);
  font-weight: 600;
  font-size: 0.9rem;
  margin-top: 12px;
  transition: all 0.3s ease;
}

.developer-credit:hover {
  background: rgba(67, 97, 238, 0.2);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(67, 97, 238, 0.2);
}

.developer-credit i {
  font-size: 0.9rem;
}

.footer-bottom-wave {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  overflow: hidden;
}

.footer-bottom-wave::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 100px;
  background: linear-gradient(transparent, rgba(67, 97, 238, 0.05));
  border-radius: 50% 50% 0 0;
  transform: scale(2);
}

/* ========== RESPONSIVE DESIGN ========== */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }

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

  .about-hero h1 {
    font-size: 2.5rem;
  }

  .about-hero p {
    font-size: 1.1rem;
  }

  .about-section h2 {
    font-size: 1.8rem;
  }

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

  .footer {
    padding: 40px 20px 25px;
  }

  .footer-logo-icon {
    width: 60px;
    height: 60px;
  }

  .footer-logo-icon i {
    font-size: 2rem;
  }

  .footer-logo-text h2 {
    font-size: 1.8rem;
  }

  .footer-tagline {
    font-size: 1rem;
  }

  .footer-copyright-text {
    font-size: 0.9rem;
  }

  .copyright-line {
    font-size: 0.95rem;
  }
}

@media (max-width: 480px) {
  .about-hero {
    padding: 60px 20px;
  }

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

  .about-content {
    padding: 40px 20px;
  }

  .contact-info {
    padding: 20px;
  }

  .footer {
    padding: 30px 15px 20px;
  }

  .footer-logo-icon {
    width: 50px;
    height: 50px;
  }

  .footer-logo-icon i {
    font-size: 1.8rem;
  }

  .footer-logo-text h2 {
    font-size: 1.5rem;
  }

  .footer-tagline {
    font-size: 0.9rem;
  }

  .developer-credit {
    font-size: 0.85rem;
    padding: 6px 12px;
  }
}