* {
  box-sizing: border-box;
}

:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --accent-pink: #ff6b9d;
  --accent-purple: #a55eea;
  --accent-green: #4ade80;
  --accent-blue: #60a5fa;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --shadow-premium: 0 20px 40px -10px rgba(0, 0, 0, 0.1);
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(255, 255, 255, 0.5);
  --glass-blur: blur(16px);
  --border-radius: 16px;
  --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --gradient-premium: linear-gradient(135deg, var(--accent-purple), var(--accent-pink));
  --gradient-soft: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
}

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap');

html,
body {
  font-family: 'Outfit', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1;
  margin: 0;
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.8rem 5%;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 1000;
  transition: var(--transition);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.nav-logo {
  height: 50px;
  width: auto;
  margin-right: 50px;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transition: var(--transition);
}

.nav-brand h2 {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-premium);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin: 0;
}

.nav-brand:hover .nav-logo {
  transform: scale(1.05);
}

.navbar .nav-links {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
}

.navbar .nav-links li {
  position: relative;
}

.navbar .nav-links a {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--text-secondary);
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition);
  border-radius: 8px;
  position: relative;
}

.navbar .nav-links a:hover {
  color: var(--accent-purple);
  background: rgba(165, 94, 234, 0.05);
}

.navbar .nav-links a.active {
  color: var(--accent-purple);
  font-weight: 600;
  background: rgba(165, 94, 234, 0.1);
}

/* Slide underline effect */
.navbar .nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--accent-purple);
  transition: width 0.3s ease;
  border-radius: 8px;
}

/* --- PREMIUM CURVED FOOTER --- */
.main-footer {
  background-color: #1f2937;
  color: #e5e7eb;
  padding: 80px 5% 40px;
  position: relative;
  margin-top: 120px;
  font-family: 'Outfit', sans-serif;
  overflow: hidden;
  width: 100%;
  display: block;
}

.footer-wave {
  position: absolute;
  top: -60px;
  left: 0;
  width: 100%;
  height: 60px;
  background-color: #1f2937;
  clip-path: ellipse(100% 100% at 50% 100%);
  z-index: 1;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 60px;
  padding-top: 20px;
  position: relative;
  z-index: 2;
}

.lang-selector {
  background: rgba(255, 255, 255, 0.08);
  padding: 10px 22px;
  border-radius: 30px;
  font-size: 0.95rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  cursor: pointer;
  transition: 0.3s ease;
}

.lang-selector:hover {
  background: rgba(255, 255, 255, 0.2);
}

.footer-social-icons {
  display: flex;
  gap: 18px;
}

.footer-social-icon {
  width: 45px;
  height: 45px;
  background: #ffffff;
  color: #1f2937;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  transition: 0.3s ease;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
}

.footer-social-icon:hover {
  transform: translateY(-6px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
  background: linear-gradient(135deg, #272e52, #7658ae);
  /* Premium gradient */
  color: white;
}

.footer-bottom-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 35px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.85rem;
  color: #9ca3af;
  position: relative;
  z-index: 2;
}

.footer-personal-links {
  display: flex;
  gap: 28px;
}

.footer-personal-links a,
.footer-personal-links span {
  text-decoration: none;
  color: #9ca3af;
  transition: 0.3s ease;
}

.footer-personal-links a:hover {
  color: #f3f4f6;
}

.footer-personal-links .footer-name {
  font-weight: 700;
  color: #f3f4f6;
}

@media (max-width: 768px) {

  .footer-top,
  .footer-bottom-row {
    flex-direction: column;
    gap: 28px;
    text-align: center;
  }

  .footer-personal-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 18px;
  }
}

.navbar .nav-links a:hover::after,
.navbar .nav-links a.active::after {
  width: 80%;
}

.navbar .desktop-logout-btn {
  padding: 0.5rem 1.25rem;
  background: white;
  color: #e74c3c;
  border: 1px solid #e74c3c;
  border-radius: 20px;
  cursor: pointer;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
}

.desktop-logout-btn:hover {
  background-color: #e74c3c;
  color: white;
  box-shadow: 0 4px 10px rgba(231, 76, 60, 0.2);
  transform: translateY(-1px);
}

/* Topics Page - Random Topics + Load More Styles */
.subtopics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  margin: 1rem 0;
}

.topic-item {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius);
  padding: 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  position: relative;
  overflow: hidden;
}

.topic-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-purple), var(--accent-pink));
}

.topic-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-purple);
}

.topic-item h4 {
  margin: 0 0 0.5rem 0;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.3;
}

.debate-link,
.debate-btn {
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-pink));
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  text-align: center;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(165, 94, 234, 0.3);
  flex-shrink: 0;
}

.debate-link:hover,
.debate-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(165, 94, 234, 0.4);
}

.topic-count {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.load-more-btn {
  background: linear-gradient(135deg, var(--accent-green), #22c55e);
  color: white;
  border: none;
  padding: 0.875rem 2rem;
  border-radius: 12px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(34, 197, 94, 0.3);
  width: 100%;
  margin-top: 1rem;
}

.load-more-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(34, 197, 94, 0.4);
}

.load-more-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.category-header h3 {
  margin: 0;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

@media (max-width: 768px) {
  .subtopics-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .topic-item {
    padding: 1rem;
  }

  .category-header h3 {
    font-size: 1.1rem;
  }
}


/* Optional auth elements can be customized here */

/* Pastel Login/Signup Modern UI */
.auth-body {
  background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 50%, #fecfef 100%);
  animation: gradientBG 10s ease infinite;
  position: relative;
  overflow-x: hidden;
  overflow-y: auto;
}

@keyframes gradientBG {

  0%,
  100% {
    background-position: 0% 50%;
  }

  50% {
    background-position: 100% 50%;
  }
}

.auth-body::before {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.5) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 40% 20%, rgba(255, 255, 255, 0.4) 0%, transparent 50%),
    radial-gradient(circle at 70% 60%, rgba(255, 255, 255, 0.2) 0%, transparent 50%);
  animation: bubbles 25s linear infinite;
  pointer-events: none;
}

@keyframes bubbles {
  0% {
    transform: translateY(0px) rotate(0deg);
  }

  100% {
    transform: translateY(-100vh) rotate(360deg);
  }
}

.auth-container {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(25px);
  border-radius: 25px;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  max-width: 420px;
  animation: cardSlide 0.7s ease-out;
}

@keyframes cardSlide {
  from {
    opacity: 0;
    transform: translateY(50px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.auth-header h1 {
  background: linear-gradient(135deg, #8e24aa, #ba68c8, #ab47bc);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: 2.5rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.auth-form {
  padding: 45px 35px;
}

.form-group input {
  border: 2px solid rgba(142, 36, 170, 0.2);
  border-radius: 15px;
  padding: 16px 20px;
  font-size: 1rem;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(15px);
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.form-group input:focus {
  outline: none;
  border-color: #9c27b0;
  box-shadow: 0 0 0 4px rgba(156, 39, 176, 0.2);
  transform: translateY(-1px);
}

.auth-btn {
  background: linear-gradient(135deg, #9c27b0, #ab47bc, #ce93d8);
  border-radius: 15px;
  font-weight: 600;
  font-size: 1.1rem;
  box-shadow: 0 8px 25px rgba(156, 39, 176, 0.4);
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.auth-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 35px rgba(156, 39, 176, 0.6);
}

.auth-links a {
  color: #9c27b0;
  font-weight: 600;
  position: relative;
}

.auth-links a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -2px;
  left: 0;
  background: linear-gradient(135deg, #9c27b0, #ce93d8);
  transition: width 0.3s ease;
}

.auth-links a:hover::after {
  width: 100%;
}

.feature-highlight {
  background: rgba(206, 147, 216, 0.3);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(156, 39, 176, 0.2);
  border-radius: 20px;
}

@media (max-width: 600px) {
  .auth-container {
    margin: 20px;
    padding: 35px 25px;
  }
}


/* Pastel Auth Pages - Login/Signup */
body.auth-body {
  background: linear-gradient(135deg, #fdfbfb 0%, #ebedee 100%);
  position: relative;
  overflow-x: hidden;
  overflow-y: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.auth-page .main-content {
  width: 100%;
  padding: 20px;
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: center;
}

.auth-page .container {
  background: white;
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(0, 0, 0, 0.05);
  max-width: 450px;
  width: 100%;
  padding: 40px;
  animation: fadeIn 0.6s ease-out;
}

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

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.auth-page .auth-header h1 {
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
  font-size: clamp(2rem, 5vw, 2.5rem);
  margin-bottom: 0.5rem;
}

.auth-page .form-group input {
  background: var(--bg-secondary);
  border: 2px solid transparent;
  border-radius: 12px;
  padding: 16px 20px;
  font-size: 1rem;
  transition: all 0.3s ease;
  width: 100%;
  box-sizing: border-box;
}

.auth-page .form-group input:focus {
  border-color: var(--accent-purple);
  background: white;
  box-shadow: 0 0 0 4px rgba(165, 94, 234, 0.1);
}

.auth-page .auth-btn {
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
  color: white;
  border: none;
  border-radius: 12px;
  padding: 16px;
  font-size: 1.1rem;
  font-weight: 600;
  width: 100%;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(165, 94, 234, 0.3);
  transition: all 0.3s ease;
  margin-top: 10px;
}

.auth-page .auth-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(165, 94, 234, 0.4);
}

.auth-page .auth-links a {
  color: var(--accent-purple);
  font-weight: 600;
  text-decoration: none;
  transition: color 0.3s ease;
}

.auth-page .auth-links a:hover {
  color: var(--accent-blue);
}

.auth-page .feature-highlight {
  background: var(--bg-secondary);
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: 12px;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
  transition: transform 0.3s ease;
}

.auth-page .feature-highlight:hover {
  transform: translateY(-2px);
}

.auth-page .highlight-icon {
  background: linear-gradient(135deg, #CE93D8, #9C27B0);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: 1.8rem;
}

@media (max-width: 480px) {
  .auth-page .container {
    margin: 10px;
    padding: 40px 25px;
  }
}

/* Voice Search Mic Button */
.mic-btn {
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background-color: #4CAF50;
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(76, 175, 80, 0.3);
  flex-shrink: 0;
  position: relative;
}

.mic-btn:hover {
  background-color: #45a049;
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(76, 175, 80, 0.4);
}

.mic-btn.listening {
  background-color: #f44336;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(244, 67, 54, 0.7);
  }

  70% {
    box-shadow: 0 0 0 20px rgba(244, 67, 54, 0);
  }

  100% {
    box-shadow: 0 0 0 0 rgba(244, 67, 54, 0);
  }
}

.material-icons {
  font-size: 24px !important;
  width: 24px !important;
  height: 24px !important;
}

/* Hierarchical Categories Styles */
.category-item {
  position: relative;
}

.category-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  padding: 5px 0;
}

.toggle-icon {
  font-size: 18px;
  transition: transform 0.3s ease;
}

.category-subtopics {
  margin-top: 10px;
  padding: 15px;
  background: linear-gradient(135deg, #f8f9fa, #e9ecef);
  border-radius: 8px;
  border-left: 4px solid #4CAF50;
}

.subtopics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 8px;
  margin-top: 10px;
}

.subtopic-link {
  display: block;
  padding: 12px 16px;
  background: white;
  border-radius: 6px;
  text-decoration: none;
  color: #333;
  border-left: 3px solid #4CAF50;
  transition: all 0.3s ease;
  font-size: 14px;
  font-weight: 500;
}

.subtopic-link:hover {
  background-color: #4CAF50;
  color: white;
  transform: translateX(5px);
  box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
}

.topics-scroll-wrapper {
  max-height: 70vh;
  overflow-y: auto;
  scroll-behavior: smooth;
  padding: 1rem 0;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-blue) transparent;
}

.topics-scroll-wrapper::-webkit-scrollbar {
  width: 8px;
}

.topics-scroll-wrapper::-webkit-scrollbar-track {
  background: transparent;
  border-radius: 4px;
}

.topics-scroll-wrapper::-webkit-scrollbar-thumb {
  background: var(--accent-blue);
  border-radius: 4px;
}

.topics-scroll-wrapper::-webkit-scrollbar-thumb:hover {
  background: color-mix(in srgb, var(--accent-blue), black 20%);
}

.categories-container {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  gap: 1rem;
  padding: 1rem 0;
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-purple) transparent;
}

.categories-container::-webkit-scrollbar {
  height: 8px;
}

.categories-container::-webkit-scrollbar-track {
  background: transparent;
}

.categories-container::-webkit-scrollbar-thumb {
  background: var(--accent-purple);
  border-radius: 4px;
}

.categories-container::-webkit-scrollbar-thumb:hover {
  background: color-mix(in srgb, var(--accent-purple), black 20%);
}

.category-item {
  flex: 0 0 auto;
  background: linear-gradient(135deg, var(--glass-bg), rgba(255, 255, 255, 0.6));
  backdrop-filter: var(--glass-blur);
  border-radius: 20px;
  padding: 1rem 1.5rem;
  min-width: 140px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  scroll-snap-align: center;
  box-shadow: var(--shadow-sm);
}

.category-item:hover,
.category-item.active {
  border-color: var(--accent-purple);
  transform: translateY(-4px) scale(1.02);
  box-shadow: var(--shadow-lg);
}

.category-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.category-header {
  padding: 1.5rem;
  cursor: pointer;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.category-header:hover {
  background: rgba(255, 255, 255, 0.9);
}

.toggle-icon {
  transition: transform 0.3s ease;
  font-weight: bold;
  font-size: 1.2rem;
}

.category-subtopics {
  max-height: 0;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 0 1rem;
}

.category-subtopics.active {
  max-height: 400px;
  padding: 1.25rem;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-purple) transparent;
}

.category-subtopics.active::-webkit-scrollbar {
  width: 6px;
}

.category-subtopics.active::-webkit-scrollbar-track {
  background: transparent;
}

.category-subtopics.active::-webkit-scrollbar-thumb {
  background: var(--accent-purple);
  border-radius: 3px;
}

.category-subtopics.active::-webkit-scrollbar-thumb:hover {
  background: color-mix(in srgb, var(--accent-purple), black 20%);
}

.chips-container {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.75rem;
  overflow-x: auto;
  padding: 0.75rem 0;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  -ms-overflow-style: none;
  scroll-behavior: smooth;
}

.chips-container::-webkit-scrollbar {
  height: 6px;
}

/* Modals */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal.show {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--bg-primary);
  border-radius: 20px;
  padding: 2.5rem;
  width: 90%;
  max-width: 450px;
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(255, 255, 255, 0.5);
  transform: translateY(20px) scale(0.95);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal.show .modal-content {
  transform: translateY(0) scale(1);
}

.modal-content h3 {
  margin-top: 0;
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
  color: var(--text-primary);
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-pink));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.modal-content label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

.modal-content input {
  width: 100%;
  padding: 12px 16px;
  border-radius: 12px;
  border: 2px solid transparent;
  background: var(--bg-secondary);
  font-family: inherit;
  font-size: 1rem;
  color: var(--text-primary);
  transition: all 0.2s ease;
  margin-bottom: 1.5rem;
  box-sizing: border-box;
}

.modal-content input:focus {
  outline: none;
  background: var(--bg-primary);
  border-color: var(--accent-purple);
  box-shadow: 0 0 0 4px rgba(165, 94, 234, 0.1);
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  margin-top: 2rem;
}

.modal-actions button {
  padding: 10px 20px;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  font-family: inherit;
}

.modal-actions button:last-child {
  background: var(--bg-secondary);
  color: var(--text-secondary);
}

.modal-actions button:last-child:hover {
  background: #e2e8f0;
  color: var(--text-primary);
}

.edit-btn,
.change-pwd-btn {
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
  color: white;
  box-shadow: 0 4px 15px rgba(165, 94, 234, 0.3);
}

.edit-btn:hover,
.change-pwd-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(165, 94, 234, 0.4);
}

.delete-btn {
  background: linear-gradient(135deg, #ef4444, #f87171);
  color: white;
  box-shadow: 0 4px 15px rgba(239, 68, 68, 0.3);
}

.delete-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(239, 68, 68, 0.4);
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: rgba(15, 23, 42, 0.9);
  color: white;
  padding: 12px 24px;
  border-radius: 30px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(10px);
  z-index: 3000;
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  display: flex;
  align-items: center;
  gap: 10px;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.toast.success {
  border-left: 4px solid var(--accent-green);
}

.toast.error {
  border-left: 4px solid #ef4444;
}

/* Profile Specific Layout Enhancements */
.profile-header {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 3rem;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border-radius: 24px;
  margin-bottom: 2rem;
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.profile-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-premium);
}

.avatar-container {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--gradient-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 25px rgba(96, 165, 250, 0.3);
  position: relative;
}

.avatar-container::after {
  content: '';
  position: absolute;
  top: -5px;
  bottom: -5px;
  left: -5px;
  right: -5px;
  border-radius: 50%;
  border: 2px dashed rgba(165, 94, 234, 0.4);
  animation: rotate 20s linear infinite;
}

@keyframes rotate {
  100% {
    transform: rotate(360deg);
  }
}

.avatar-main {
  font-size: 3rem;
  font-weight: 700;
  color: white;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.profile-header-info h1 {
  margin: 0 0 0.5rem 0;
  font-size: 2.5rem;
  background: var(--gradient-premium);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.member-badge {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(165, 94, 234, 0.1);
  color: var(--accent-purple);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid rgba(165, 94, 234, 0.2);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  padding: 2rem;
  border-radius: 20px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.5);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.stat-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  display: inline-block;
  filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.1));
}

.stat-value {
  display: block;
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.section-card {
  background: var(--bg-primary);
  border-radius: 24px;
  padding: 2.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.section-title {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
  border-bottom: 2px solid var(--bg-secondary);
  padding-bottom: 1rem;
}

.section-title span {
  font-size: 1.8rem;
}

.section-title h2 {
  margin: 0;
  font-size: 1.5rem;
  color: var(--text-primary);
}

.achievements-premium-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 1.5rem;
}

.ach-card {
  background: var(--bg-secondary);
  border-radius: 16px;
  padding: 1.5rem 1rem;
  text-align: center;
  transition: all 0.3s ease;
  border: 1px solid transparent;
  cursor: help;
}

.ach-card.unlocked {
  background: white;
  border-color: rgba(165, 94, 234, 0.2);
  box-shadow: 0 10px 20px rgba(165, 94, 234, 0.1);
}

.ach-card.unlocked:hover {
  transform: translateY(-5px) scale(1.05);
  box-shadow: 0 15px 30px rgba(165, 94, 234, 0.15);
}

.ach-card.locked {
  opacity: 0.5;
  filter: grayscale(100%);
}

.ach-card-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  transition: transform 0.3s ease;
}

.ach-card.unlocked:hover .ach-card-icon {
  transform: rotate(10deg) scale(1.1);
}

.ach-card-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.settings-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.premium-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 12px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid rgba(0, 0, 0, 0.1);
  background: white;
  color: var(--text-primary);
  font-family: inherit;
}

.premium-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-purple);
  color: var(--accent-purple);
}

.premium-btn.btn-del {
  color: #ef4444;
}

.premium-btn.btn-del:hover {
  border-color: #ef4444;
  background: rgba(239, 68, 68, 0.05);
}

.chips-container::-webkit-scrollbar-track {
  background: transparent;
}

.chips-container::-webkit-scrollbar-thumb {
  background: var(--accent-blue);
  border-radius: 3px;
}

.subtopic-chip {
  flex: 0 0 auto;
  background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
  color: white;
  border: none;
  border-radius: 25px;
  padding: 0.75rem 1.25rem;
  font-weight: 600;
  font-size: 0.875rem;
  white-space: nowrap;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  scroll-snap-align: start;
  box-shadow: var(--shadow-sm);
}

.subtopic-chip:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: var(--shadow-md);
}

.subtopic-chip:active {
  transform: translateY(0) scale(0.98);
}

@media (max-width: 768px) {
  .chips-container {
    gap: 0.5rem;
  }

  .subtopic-chip {
    padding: 0.6rem 1rem;
    font-size: 0.8rem;
  }
}

@media (max-width: 768px) {
  .categories-container {
    grid-template-columns: 1fr;
  }

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

/* Profile Page Specific Premium Styles */
.profile-header {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-bottom: 3rem;
  padding: 2.5rem;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
  text-align: left;
}

.profile-header::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 200%;
  background: radial-gradient(circle, rgba(165, 94, 234, 0.1) 0%, transparent 70%);
  z-index: 0;
}

.avatar-container {
  position: relative;
  z-index: 1;
}

.avatar-main {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--gradient-premium);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: white;
  font-weight: 700;
  box-shadow: 0 8px 25px rgba(165, 94, 234, 0.4);
  border: 4px solid white;
}

.profile-header-info {
  z-index: 1;
}

.profile-header-info h1 {
  margin: 0;
  font-size: 2.5rem;
  background: var(--gradient-premium);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.member-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(165, 94, 234, 0.1);
  color: var(--accent-purple);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-top: 0.5rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.stat-card {
  background: white;
  padding: 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  border: 1px solid rgba(0, 0, 0, 0.03);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.stat-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.stat-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.section-card {
  background: white;
  padding: 2rem;
  border-radius: 20px;
  box-shadow: var(--shadow-md);
  margin-bottom: 2rem;
  border: 1px solid rgba(0, 0, 0, 0.03);
}

.section-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  font-size: 1.4rem;
  color: var(--text-primary);
}

.progress-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

@media (max-width: 768px) {
  .progress-container {
    grid-template-columns: 1fr;
  }
}

.achievements-premium-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 1rem;
}

.ach-card {
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border-radius: 16px;
  padding: 1rem;
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}

.ach-card.unlocked {
  background: white;
  border-color: rgba(165, 94, 234, 0.2);
  box-shadow: var(--shadow-sm);
}

.ach-card:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
}

.ach-card.locked {
  opacity: 0.5;
  filter: grayscale(1);
}

.ach-card-icon {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.ach-card-title {
  font-size: 0.85rem;
  font-weight: 600;
  text-align: center;
  color: var(--text-primary);
}

.settings-bar {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 2rem;
}

.premium-btn {
  padding: 0.75rem 1.5rem;
  border-radius: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-edit {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.btn-edit:hover {
  background: #e2e8f0;
}

.btn-pwd {
  background: rgba(96, 165, 250, 0.1);
  color: var(--accent-blue);
}

.btn-pwd:hover {
  background: rgba(96, 165, 250, 0.2);
}

.btn-del {
  background: rgba(231, 76, 60, 0.1);
  color: #e74c3c;
}

.btn-del:hover {
  background: rgba(231, 76, 60, 0.2);
}

.main-content {
  margin-top: -5px;
  min-height: calc(100vh - 60px);
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 20px;
  box-sizing: border-box;
}

.container {
  background-color: white;
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 1366px;
  margin: 0 auto;
  text-align: center;
}

@media (max-width: 768px) {
  .container {
    padding: 20px 15px;
  }
}

h1,
h2,
h3 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-pink));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

form {
  display: flex;
  flex-direction: column;
  width: 100%;
}

label {
  margin-top: 15px;
  margin-bottom: 5px;
  text-align: left;
  font-weight: 500;
  color: var(--text-secondary);
}

input {
  padding: 12px 16px;
  border: 2px solid transparent;
  border-radius: 12px;
  background: var(--bg-secondary);
  font-family: inherit;
  font-size: 1rem;
  color: var(--text-primary);
  transition: all 0.2s ease;
  width: 100%;
  box-sizing: border-box;
}

input:focus {
  outline: none;
  background: var(--bg-primary);
  border-color: var(--accent-purple);
  box-shadow: 0 0 0 4px rgba(165, 94, 234, 0.1);
}

button {
  margin-top: 20px;
  padding: 12px 24px;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
  color: white;
  border: none;
  border-radius: 12px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(165, 94, 234, 0.3);
  font-family: inherit;
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(165, 94, 234, 0.4);
}

a {
  color: var(--accent-purple);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--accent-blue);
}

body::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at top right, rgba(96, 165, 250, 0.05), transparent 40%),
    radial-gradient(circle at bottom left, rgba(165, 94, 234, 0.05), transparent 40%);
  pointer-events: none;
  z-index: -1;
}

.logout-btn {
  display: inline-block;
  margin: 20px auto;
  padding: 10px 24px;
  background-color: #fff;
  color: #ef4444;
  border: 1px solid #ef4444;
  border-radius: 20px;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
}

.logout-btn:hover {
  background-color: #ef4444;
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.2);
}

/* Base Loader Animation for global use */
.loader-spinner {
  width: 24px;
  height: 24px;
  border: 3px solid rgba(165, 94, 234, 0.2);
  border-top-color: var(--accent-purple);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  display: inline-block;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Main app container spacing fix */
.container {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  padding: 40px;
  border-radius: 24px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--glass-border);
  width: 100%;
  max-width: 1366px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
}

@media (max-width: 768px) {
  .container {
    padding: 25px 15px;
    border-radius: 16px;
  }
}

/* --- PREMIUM UI OVERHAUL (v2) --- */

.premium-glass-card {
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.5);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
  border-radius: 32px;
}

.text-gradient-premium {
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-pink), var(--accent-blue));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% auto;
  animation: shimmer 4s linear infinite;
}

@keyframes shimmer {
  to {
    background-position: 200% center;
  }
}

.animate-float {
  animation: float 6s ease-in-out infinite;
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-15px);
  }
}

/* Hero V2 */
.hero-v2 {
  padding: 80px 40px;
  position: relative;
  overflow: hidden;
  text-align: left;
  display: flex;
  align-items: center;
  gap: 40px;
}

.hero-v2-content {
  flex: 1;
  z-index: 2;
}

.hero-v2-visual {
  flex: 0.8;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.floating-shapes {
  position: absolute;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.3;
  z-index: -1;
}

.shape-1 {
  width: 300px;
  height: 300px;
  background: var(--accent-purple);
  top: -50px;
  right: -50px;
}

.shape-2 {
  width: 250px;
  height: 250px;
  background: var(--accent-pink);
  bottom: -30px;
  left: -30px;
}

.shape-3 {
  width: 200px;
  height: 200px;
  background: var(--accent-blue);
  top: 20%;
  left: 10%;
}

/* Stats Tiles */
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-top: 50px;
  flex-wrap: wrap;
}

.stat-item {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  padding: 30px 25px;
  border-radius: 24px;
  text-align: center;
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  min-width: 180px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.stat-item:hover {
  transform: translateY(-8px) scale(1.02);
  background: white;
  box-shadow: var(--shadow-premium);
  border-color: var(--accent-purple);
}

.stat-icon-large {
  font-size: 2.5rem;
  margin-bottom: 5px;
  filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.1));
}

.stat-number {
  font-size: 1.2rem;
  font-weight: 800;
  background: var(--gradient-premium);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}

.stat-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

@media (max-width: 600px) {
  .hero-stats {
    gap: 15px;
  }

  .stat-item {
    min-width: 140px;
    padding: 20px 15px;
  }

  .stat-number {
    font-size: 1.8rem;
  }
}

.stat-tile-label {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Quick Tile */
.quick-tile {
  background: white;
  padding: 30px;
  border-radius: 28px;
  transition: var(--transition);
  border: 2px solid transparent;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.quick-tile:hover {
  border-color: var(--accent-purple);
  box-shadow: var(--shadow-xl);
  transform: translateY(-8px);
}

.quick-tile-icon {
  font-size: 2.5rem;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border-radius: 18px;
  transition: var(--transition);
}

.quick-tile:hover .quick-tile-icon {
  background: var(--gradient-premium);
  color: white;
  transform: rotate(8deg);
}

/* Recent History List Premium */
.history-card-premium {
  background: white;
  border-radius: 20px;
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid rgba(0, 0, 0, 0.04);
  transition: var(--transition);
  margin-bottom: 15px;
}

.history-card-premium:hover {
  background: var(--bg-secondary);
  transform: translateX(10px);
  border-color: var(--accent-blue);
}

@media (max-width: 968px) {
  .hero-v2 {
    flex-direction: column;
    text-align: center;
    padding: 60px 20px;
  }

  .hero-v2-visual {
    display: none;
  }
}

/* --- REFINED PREMIUM DECORATIONS --- */

.hero-container {
  max-width: 1200px;
  margin: 40px auto;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-premium);
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(165, 94, 234, 0.1);
  color: var(--accent-purple);
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 20px;
  border: 1px solid rgba(165, 94, 234, 0.2);
  letter-spacing: 0.02em;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  line-height: 1.1;
  margin-bottom: 10px;
  font-weight: 800;
}

.hero-subtitle {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  color: var(--text-secondary);
  margin-bottom: 24px;
  font-weight: 500;
}

.hero-actions .cta-button.primary {
  background: var(--gradient-premium);
  padding: 14px 32px;
  font-size: 1.1rem;
}

.hero-actions .cta-button.secondary {
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
}

.hero-actions .cta-button.secondary:hover {
  background: white;
}


/* --- PROFILE REFINEMENT --- */

.profile-container {
  padding: 0;
  background: transparent;
  box-shadow: none;
  border: none;
}

.profile-header {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  padding: 40px;
  border-radius: var(--border-radius-xl);
  display: flex;
  align-items: center;
  gap: 30px;
  margin-bottom: 30px;
  box-shadow: var(--shadow-premium);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  background: white;
  padding: 30px;
  border-radius: var(--border-radius-lg);
  text-align: center;
  transition: var(--transition);
  border: 1px solid rgba(0, 0, 0, 0.02);
  box-shadow: var(--shadow-sm);
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-premium);
  border-color: var(--accent-purple);
}

.stat-value {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
}

.stat-label {
  text-transform: uppercase;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

.section-card {
  background: white;
  padding: 30px;
  border-radius: var(--border-radius-lg);
  margin-bottom: 30px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0, 0, 0, 0.02);
}


/* --- AUTH PAGES REFINEMENT --- */

.auth-page .container {
  max-width: 450px;
  padding: 60px 40px;
}

.auth-header h1 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.auth-form {
  text-align: left;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.auth-btn {
  width: 100%;
  padding: 14px;
  background: var(--gradient-premium);
  color: white;
  border: none;
  border-radius: 12px;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 8px 20px rgba(165, 94, 234, 0.25);
}

.auth-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(165, 94, 234, 0.35);
}

.auth-links {
  margin-top: 30px;
  font-size: 0.95rem;
}

.auth-links a {
  color: var(--accent-purple);
  font-weight: 700;
  text-decoration: none;
}

.auth-features {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 40px;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  padding-top: 30px;
}

.feature-highlight {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.highlight-icon {
  font-size: 1.2rem;
  width: 32px;
  height: 32px;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
}

/* --- MOBILE RESPONSIVE OVERRIDES --- */
.nav-mobile-only {
  display: none;
}

.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
  width: 36px;
  height: 36px;
}

.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  margin-bottom: 4px;
  transition: 0.3s;
  border-radius: 2px;
}

.hamburger span:last-child {
  margin-bottom: 0;
}

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

.nav-close-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  padding: 10px 0;
  width: 100%;
  text-align: left;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  margin-bottom: 10px;
}

@media (max-width: 900px) {
  .nav-logo {
    margin-right: 20px;
  }
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
  }

  .navbar .nav-links {
    position: fixed;
    top: 0;
    right: -300px;
    width: 260px;
    height: 100vh;
    background: white;
    flex-direction: column;
    padding: 30px 20px;
    box-shadow: -5px 0 25px rgba(0, 0, 0, 0.1);
    transition: 0.3s ease-in-out;
    z-index: 2000;
    margin: 0;
    overflow-y: auto;
  }

  .navbar.nav-open .nav-links {
    right: 0;
  }

  .navbar.nav-open .nav-overlay {
    display: block;
  }

  .nav-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1500;
  }

  .nav-mobile-only {
    display: block;
  }

  .desktop-logout-btn {
    display: none;
  }

  .logout-btn-mobile {
    display: block;
    text-align: center;
    padding: 12px;
    background: #ef4444;
    color: white;
    border-radius: 8px;
    margin-top: 20px;
    text-decoration: none;
    font-weight: bold;
  }
}

/* Mobile optimization for various screen sizes */
@media (max-width: 600px) {
  .container {
    width: 100%;
    max-width: 450px;
    /* Allow it to breathe up to 450px */
    padding: 20px 10px;
    margin: 0 auto;
  }

  .main-content {
    padding: 10px;
  }

  body {
    overflow-x: hidden;
    width: 100%;
  }

  .navbar {
    padding: 0.8rem 15px;
  }

  .nav-logo {
    height: 40px !important;
    margin-right: 15px !important;
  }

  .nav-brand h2 {
    font-size: 1.2rem !important;
  }

  /* Premium Modern Search Pill */
  .search-input-wrapper {
    flex-wrap: nowrap !important;
    padding: 8px 8px 8px 20px !important;
    height: 50px !important;
    gap: 8px !important;
    border-radius: 25px !important;
  }

  .search-icon {
    display: none !important;
  }

  .search-input {
    font-size: 0.95rem !important;
    padding: 0 !important;
  }

  .mic-btn {
    width: 36px !important;
    height: 36px !important;
    flex: 0 0 36px !important;
    margin-right: 0 !important;
  }

  .search-btn {
    width: 44px !important;
    height: 36px !important;
    padding: 0 !important;
    flex: 0 0 44px !important;
    border-radius: 20px !important;
    margin-right: 0 !important;
    font-size: 0 !important;
    /* Hide text, show icon if I add it, or just keep it small */
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
  }

  /* Add search icon to button on mobile since we hid text */
  .search-btn::before {
    content: '\e8b6';
    /* Material Icon 'search' code */
    font-family: 'Material Icons';
    font-size: 20px;
    color: white;
  }

  /* 2-Column Category Grid */
  .category-grid {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 12px !important;
    padding: 0 15px !important;
    overflow-x: visible !important;
    scroll-snap-type: none !important;
  }

  .cat-card {
    width: 100% !important;
    padding: 18px 12px !important;
  }

  .cat-card .cat-emoji {
    font-size: 1.8rem !important;
  }

  .cat-card .cat-name {
    font-size: 0.85rem !important;
  }

  /* Compression */
  .search-section {
    margin-bottom: 30px !important;
  }

  .topics-page-container {
    padding: 30px 15px 40px !important;
  }

  .topics-title {
    font-size: 2rem !important;
    margin-bottom: 8px !important;
  }

  /* Profile Page Mobile Overrides */
  .profile-header {
    flex-direction: column !important;
    text-align: center !important;
    padding: 30px 15px !important;
    gap: 20px !important;
  }

  .profile-header-info h1 {
    font-size: 1.8rem !important;
  }

  .stats-grid {
    grid-template-columns: repeat(3, 1fr) !important;
    gap: 8px !important;
    margin-bottom: 25px !important;
  }

  .stat-card {
    padding: 15px 8px !important;
    border-radius: 12px !important;
  }

  .stat-icon {
    font-size: 1.5rem !important;
    margin-bottom: 5px !important;
  }

  .stat-value {
    font-size: 0.95rem !important;
  }

  .stat-label {
    font-size: 0.65rem !important;
  }

  .section-card {
    padding: 20px 15px !important;
    border-radius: 20px !important;
  }

  .section-title {
    margin-bottom: 20px !important;
  }

  .section-title h2 {
    font-size: 1.2rem !important;
  }

  .achievements-premium-grid {
    grid-template-columns: repeat(3, 1fr) !important;
    gap: 10px !important;
  }

  .ach-card {
    padding: 12px 8px !important;
  }

  .ach-card-icon {
    font-size: 1.2rem !important;
  }

  .ach-card-title {
    font-size: 0.7rem !important;
  }

  .settings-bar {
    display: flex !important;
    flex-direction: column !important;
    gap: 10px !important;
  }

  .premium-btn {
    width: 100% !important;
    margin: 0 !important;
    justify-content: center !important;
  }
}