/* ============================================================
   MEMORAE — Global Glassmorphic Styles
   ============================================================ */

/* ── Variables ────────────────────────────────────────────── */
:root {
  --primary:       #7C3AED;
  --primary-light: #A78BFA;
  --primary-dark:  #5B21B6;
  --secondary:     #EC4899;
  --accent:        #06B6D4;
  --success:       #10B981;
  --warning:       #F59E0B;
  --danger:        #EF4444;
  --bg-start:      #0F0A1E;
  --bg-mid:        #1A0A2E;
  --bg-end:        #0D1B3E;
  --glass-bg:      rgba(255,255,255,0.07);
  --glass-border:  rgba(255,255,255,0.15);
  --glass-shadow:  0 8px 32px rgba(0,0,0,0.4);
  --text-primary:  #F0EEFF;
  --text-secondary:#B8B0D8;
  --text-muted:    #7B7098;
  --radius:        16px;
  --radius-sm:     8px;
  --radius-lg:     24px;
  --radius-xl:     32px;
  --transition:    0.3s ease;
  --font:          'Inter', 'Segoe UI', sans-serif;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font);
  background: linear-gradient(135deg, var(--bg-start) 0%, var(--bg-mid) 50%, var(--bg-end) 100%);
  background-attachment: fixed;
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: inherit; }
input, textarea, select { font-family: inherit; }

/* ── Background Blobs ─────────────────────────────────────── */
.bg-blob {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
  pointer-events: none;
  z-index: 0;
  animation: blobFloat 8s ease-in-out infinite alternate;
}
.bg-blob-1 { width: 600px; height: 600px; background: var(--primary); top: -200px; left: -200px; animation-delay: 0s; }
.bg-blob-2 { width: 500px; height: 500px; background: var(--secondary); bottom: -150px; right: -150px; animation-delay: -3s; }
.bg-blob-3 { width: 400px; height: 400px; background: var(--accent); top: 40%; left: 50%; transform: translateX(-50%); animation-delay: -6s; }

@keyframes blobFloat {
  0%   { transform: translate(0,0) scale(1); }
  100% { transform: translate(30px,20px) scale(1.05); }
}

/* ── Glassmorphic Card ────────────────────────────────────── */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: var(--radius);
}
.glass-dark {
  background: rgba(0,0,0,0.3);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: var(--glass-shadow);
  border-radius: var(--radius);
}
.glass-strong {
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border: 1px solid rgba(255,255,255,0.2);
  box-shadow: 0 16px 48px rgba(0,0,0,0.5);
  border-radius: var(--radius);
}

/* ── Gradient Text ────────────────────────────────────────── */
.gradient-text {
  background: linear-gradient(135deg, var(--primary-light), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition);
  border: none;
  cursor: pointer;
  text-align: center;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  box-shadow: 0 4px 20px rgba(124,58,237,0.4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(124,58,237,0.6); }
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--glass-border);
}
.btn-outline:hover { background: var(--glass-bg); border-color: var(--primary-light); }
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 8px 16px;
}
.btn-ghost:hover { color: var(--text-primary); background: var(--glass-bg); }
.btn-success { background: linear-gradient(135deg, #10B981, #059669); color: #fff; }
.btn-danger  { background: linear-gradient(135deg, #EF4444, #DC2626); color: #fff; }
.btn-sm { padding: 8px 18px; font-size: 0.85rem; }
.btn-lg { padding: 16px 40px; font-size: 1.1rem; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }

/* ── Navbar ───────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  width: calc(100% - 40px);
  max-width: 1200px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  border-radius: 50px;
  background: rgba(15,10,30,0.7);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border: 1px solid var(--glass-border);
  box-shadow: 0 4px 30px rgba(0,0,0,0.4);
  transition: all var(--transition);
}
.navbar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 800;
}
.navbar-logo .logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}
.navbar-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}
.navbar-links a {
  padding: 8px 16px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
}
.navbar-links a:hover, .navbar-links a.active {
  color: var(--text-primary);
  background: var(--glass-bg);
}
.navbar-actions { display: flex; align-items: center; gap: 10px; }
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; padding: 4px; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: all var(--transition); }

/* ── Hero Section ─────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 20px 80px;
  position: relative;
  z-index: 1;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 50px;
  background: rgba(124,58,237,0.2);
  border: 1px solid rgba(124,58,237,0.3);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary-light);
  margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 24px;
}
.hero p {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
}
.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 60px;
}
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}
.hero-stat-num {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-light), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-stat-label { font-size: 0.85rem; color: var(--text-muted); }

/* ── Floating Cards ───────────────────────────────────────── */
.floating-cards {
  position: relative;
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
  height: 300px;
}
.float-card {
  position: absolute;
  padding: 16px 20px;
  border-radius: var(--radius);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  animation: floatCard 3s ease-in-out infinite alternate;
}
.float-card:nth-child(1) { top: 0; left: 0; animation-delay: 0s; }
.float-card:nth-child(2) { top: 40%; right: 0; animation-delay: -1s; }
.float-card:nth-child(3) { bottom: 0; left: 20%; animation-delay: -2s; }

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

/* ── Sections ─────────────────────────────────────────────── */
.section { padding: 80px 20px; position: relative; z-index: 1; }
.section-sm { padding: 50px 20px; }
.container { max-width: 1200px; margin: 0 auto; }
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: 50px;
  background: rgba(124,58,237,0.2);
  border: 1px solid rgba(124,58,237,0.3);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
}
.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 600px;
}
.text-center { text-align: center; }
.text-center .section-subtitle { margin: 0 auto; }

/* ── Feature Cards ────────────────────────────────────────── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 48px;
}
.feature-card {
  padding: 32px;
  border-radius: var(--radius-lg);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: opacity var(--transition);
}
.feature-card:hover { transform: translateY(-6px); border-color: rgba(124,58,237,0.3); }
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  background: linear-gradient(135deg, rgba(124,58,237,0.2), rgba(236,72,153,0.2));
}
.feature-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 10px; }
.feature-card p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.6; }

/* ── Pricing Cards ────────────────────────────────────────── */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 48px;
  align-items: start;
}
.pricing-card {
  padding: 36px 32px;
  border-radius: var(--radius-lg);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  position: relative;
  transition: all var(--transition);
}
.pricing-card.featured {
  background: rgba(124,58,237,0.15);
  border-color: rgba(124,58,237,0.4);
  transform: scale(1.03);
}
.pricing-card.featured::before {
  content: '⭐ Más Popular';
  position: absolute;
  top: -14px; left: 50%; transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  padding: 4px 20px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 700;
  white-space: nowrap;
}
.pricing-plan { font-size: 0.85rem; font-weight: 600; color: var(--primary-light); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 8px; }
.pricing-price {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1;
  margin-bottom: 4px;
}
.pricing-price sup { font-size: 1.5rem; vertical-align: top; margin-top: 8px; }
.pricing-period { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 20px; }
.pricing-desc { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 28px; line-height: 1.5; }
.pricing-features { list-style: none; margin-bottom: 32px; }
.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  font-size: 0.9rem;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.pricing-features li .check { color: var(--success); font-size: 1rem; }
.pricing-features li .cross { color: var(--text-muted); font-size: 1rem; }
.pricing-badge-free {
  display: inline-block;
  padding: 3px 10px;
  background: rgba(16,185,129,0.2);
  color: var(--success);
  border: 1px solid rgba(16,185,129,0.3);
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-left: 8px;
}

/* ── Testimonial Cards ────────────────────────────────────── */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 48px;
}
.testimonial-card {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
}
.testimonial-stars { color: #F59E0B; font-size: 1rem; margin-bottom: 16px; }
.testimonial-text { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 20px; font-style: italic; }
.testimonial-author { display: flex; align-items: center; gap: 12px; }
.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}
.testimonial-name { font-weight: 600; font-size: 0.9rem; }
.testimonial-role { font-size: 0.8rem; color: var(--text-muted); }

/* ── Forms ────────────────────────────────────────────────── */
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-size: 0.9rem; font-weight: 500; color: var(--text-secondary); margin-bottom: 8px; }
.form-control {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: all var(--transition);
  outline: none;
}
.form-control:focus { border-color: var(--primary-light); background: rgba(255,255,255,0.1); box-shadow: 0 0 0 3px rgba(124,58,237,0.15); }
.form-control::placeholder { color: var(--text-muted); }
.form-control select { color: var(--text-primary); }
.input-icon-wrap { position: relative; }
.input-icon-wrap .input-icon { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--text-muted); font-size: 1rem; }
.input-icon-wrap .form-control { padding-left: 42px; }

/* ── Alerts ───────────────────────────────────────────────── */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.alert-error { background: rgba(239,68,68,0.15); border: 1px solid rgba(239,68,68,0.3); color: #FCA5A5; }
.alert-success { background: rgba(16,185,129,0.15); border: 1px solid rgba(16,185,129,0.3); color: #6EE7B7; }
.alert-info { background: rgba(6,182,212,0.15); border: 1px solid rgba(6,182,212,0.3); color: #67E8F9; }
.alert-warning { background: rgba(245,158,11,0.15); border: 1px solid rgba(245,158,11,0.3); color: #FCD34D; }

/* ── Badges ───────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-primary { background: rgba(124,58,237,0.2); color: var(--primary-light); border: 1px solid rgba(124,58,237,0.3); }
.badge-success { background: rgba(16,185,129,0.2); color: #6EE7B7; border: 1px solid rgba(16,185,129,0.3); }
.badge-warning { background: rgba(245,158,11,0.2); color: #FCD34D; border: 1px solid rgba(245,158,11,0.3); }
.badge-danger  { background: rgba(239,68,68,0.2); color: #FCA5A5; border: 1px solid rgba(239,68,68,0.3); }
.badge-muted   { background: rgba(255,255,255,0.1); color: var(--text-muted); }

/* ── Tables ───────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; }
thead th {
  padding: 14px 18px;
  text-align: left;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(0,0,0,0.2);
  border-bottom: 1px solid var(--glass-border);
}
tbody td {
  padding: 14px 18px;
  font-size: 0.9rem;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  color: var(--text-secondary);
}
tbody tr:hover td { background: rgba(255,255,255,0.03); color: var(--text-primary); }
tbody tr:last-child td { border-bottom: none; }

/* ── Sidebar Layout ───────────────────────────────────────── */
.app-layout { display: flex; min-height: 100vh; }
.sidebar {
  width: 260px;
  flex-shrink: 0;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(30px);
  border-right: 1px solid var(--glass-border);
  display: flex;
  flex-direction: column;
  padding: 24px 0;
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  z-index: 100;
  overflow-y: auto;
  transition: transform var(--transition);
}
.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 24px 28px;
  border-bottom: 1px solid var(--glass-border);
  font-size: 1.3rem;
  font-weight: 800;
}
.sidebar-logo .logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}
.sidebar-nav { flex: 1; padding: 16px 0; }
.sidebar-section-label {
  padding: 16px 24px 8px;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.sidebar-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
  border-radius: 0;
  position: relative;
}
.sidebar-link:hover { color: var(--text-primary); background: rgba(255,255,255,0.05); }
.sidebar-link.active {
  color: var(--text-primary);
  background: rgba(124,58,237,0.15);
  border-right: 3px solid var(--primary);
}
.sidebar-link .icon { font-size: 1.1rem; width: 24px; flex-shrink: 0; }
.sidebar-link .badge-count {
  margin-left: auto;
  background: var(--primary);
  color: #fff;
  padding: 2px 8px;
  border-radius: 50px;
  font-size: 0.7rem;
  font-weight: 700;
}
.sidebar-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--glass-border);
}
.sidebar-user {
  display: flex;
  align-items: center;
  gap: 12px;
}
.sidebar-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  flex-shrink: 0;
}
.sidebar-user-name { font-size: 0.9rem; font-weight: 600; }
.sidebar-user-plan { font-size: 0.75rem; color: var(--text-muted); }

/* ── Main Content ─────────────────────────────────────────── */
.main-content {
  flex: 1;
  margin-left: 260px;
  min-height: 100vh;
  padding: 0;
}
.page-header {
  padding: 28px 32px 20px;
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  background: rgba(0,0,0,0.2);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 50;
}
.page-header h1 { font-size: 1.5rem; font-weight: 700; }
.page-body { padding: 32px; }

/* ── Stats Cards ──────────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}
.stat-card {
  padding: 24px;
  border-radius: var(--radius);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all var(--transition);
}
.stat-card:hover { transform: translateY(-3px); border-color: rgba(124,58,237,0.3); }
.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}
.stat-icon.purple { background: rgba(124,58,237,0.2); }
.stat-icon.pink   { background: rgba(236,72,153,0.2); }
.stat-icon.cyan   { background: rgba(6,182,212,0.2); }
.stat-icon.green  { background: rgba(16,185,129,0.2); }
.stat-icon.amber  { background: rgba(245,158,11,0.2); }
.stat-num { font-size: 1.8rem; font-weight: 800; line-height: 1; }
.stat-label { font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; }
.stat-change { font-size: 0.75rem; margin-top: 4px; }
.stat-change.up { color: var(--success); }
.stat-change.down { color: var(--danger); }

/* ── Flashcard ────────────────────────────────────────────── */
.flashcard-scene {
  perspective: 1000px;
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
  height: 280px;
  cursor: pointer;
}
.flashcard-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.6s ease;
}
.flashcard-scene.flipped .flashcard-inner { transform: rotateY(180deg); }
.flashcard-front, .flashcard-back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px;
  text-align: center;
}
.flashcard-front { background: rgba(124,58,237,0.15); border: 1px solid rgba(124,58,237,0.3); }
.flashcard-back { background: rgba(6,182,212,0.12); border: 1px solid rgba(6,182,212,0.3); transform: rotateY(180deg); }
.flashcard-question { font-size: 1.3rem; font-weight: 600; line-height: 1.4; }
.flashcard-answer { font-size: 1.1rem; color: var(--text-secondary); line-height: 1.5; }
.flashcard-hint { font-size: 0.8rem; color: var(--text-muted); margin-top: 16px; }
.flashcard-difficulty {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 24px;
}

/* ── Calendar ─────────────────────────────────────────────── */
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}
.cal-day-header {
  text-align: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 8px 0;
  text-transform: uppercase;
}
.cal-day {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
}
.cal-day:hover { background: var(--glass-bg); }
.cal-day.today { background: rgba(124,58,237,0.3); color: var(--primary-light); font-weight: 700; }
.cal-day.has-event::after {
  content: '';
  position: absolute;
  bottom: 3px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--secondary);
}
.cal-day.other-month { color: var(--text-muted); opacity: 0.4; }

/* ── WhatsApp Widget ──────────────────────────────────────── */
.wa-account-card {
  padding: 20px;
  border-radius: var(--radius);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all var(--transition);
}
.wa-account-card:hover { border-color: rgba(37,211,102,0.3); }
.wa-status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}
.wa-status-dot.connected { background: #25D366; box-shadow: 0 0 6px #25D366; }
.wa-status-dot.disconnected { background: var(--text-muted); }
.wa-status-dot.pending { background: var(--warning); animation: pulse 1.5s infinite; }
@keyframes pulse { 0%,100% { opacity:1 } 50% { opacity:0.4 } }

/* ── Progress Bars ────────────────────────────────────────── */
.progress-bar {
  width: 100%;
  height: 8px;
  border-radius: 50px;
  background: rgba(255,255,255,0.08);
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  border-radius: 50px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transition: width 0.6s ease;
}

/* ── Modal ────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}
.modal-overlay.active { opacity: 1; pointer-events: all; }
.modal {
  width: 100%;
  max-width: 520px;
  border-radius: var(--radius-lg);
  background: rgba(15,10,30,0.95);
  border: 1px solid var(--glass-border);
  box-shadow: 0 24px 80px rgba(0,0,0,0.6);
  padding: 36px;
  transform: translateY(20px) scale(0.97);
  transition: all var(--transition);
}
.modal-overlay.active .modal { transform: translateY(0) scale(1); }
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}
.modal-title { font-size: 1.3rem; font-weight: 700; }
.modal-close { background: none; border: none; color: var(--text-muted); font-size: 1.2rem; padding: 4px; transition: color var(--transition); }
.modal-close:hover { color: var(--text-primary); }

/* ── Toast Notifications ──────────────────────────────────── */
.toast-container {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.toast {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  background: rgba(15,10,30,0.95);
  border: 1px solid var(--glass-border);
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  font-size: 0.9rem;
  min-width: 280px;
  max-width: 380px;
  transform: translateX(100%);
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.toast.show { transform: translateX(0); }
.toast.hide { transform: translateX(120%); opacity: 0; }
.toast.success .toast-icon { color: var(--success); }
.toast.error   .toast-icon { color: var(--danger); }
.toast.info    .toast-icon { color: var(--accent); }
.toast.warning .toast-icon { color: var(--warning); }

/* ── Chip / Tag ───────────────────────────────────────────── */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 500;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  transition: all var(--transition);
}
.chip:hover { border-color: var(--primary-light); color: var(--text-primary); }
.chip.active { background: rgba(124,58,237,0.2); border-color: rgba(124,58,237,0.4); color: var(--primary-light); }

/* ── Mascot ───────────────────────────────────────────────── */
.mascot {
  font-size: 5rem;
  animation: mascotBounce 2.5s ease-in-out infinite;
  display: block;
  text-align: center;
  margin-bottom: 16px;
}
@keyframes mascotBounce {
  0%,100% { transform: translateY(0) rotate(-3deg); }
  50%      { transform: translateY(-15px) rotate(3deg); }
}

/* ── Divider ──────────────────────────────────────────────── */
.divider {
  height: 1px;
  background: var(--glass-border);
  margin: 24px 0;
}
.divider-text {
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--text-muted);
  font-size: 0.85rem;
}
.divider-text::before, .divider-text::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--glass-border);
}

/* ── Checkbox / Toggle ────────────────────────────────────── */
.toggle {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 26px;
}
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.1);
  border-radius: 50px;
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid var(--glass-border);
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--text-muted);
  top: 2px; left: 2px;
  transition: all var(--transition);
}
.toggle input:checked + .toggle-slider { background: rgba(124,58,237,0.3); border-color: var(--primary); }
.toggle input:checked + .toggle-slider::before { transform: translateX(22px); background: var(--primary-light); }

/* ── Loading Spinner ──────────────────────────────────────── */
.spinner {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 3px solid rgba(255,255,255,0.15);
  border-top-color: var(--primary-light);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Footer ───────────────────────────────────────────────── */
footer {
  padding: 40px 20px;
  border-top: 1px solid var(--glass-border);
  position: relative;
  z-index: 1;
}
.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-links a { font-size: 0.85rem; color: var(--text-muted); transition: color var(--transition); }
.footer-links a:hover { color: var(--text-primary); }

/* ── Scrollbar ────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(124,58,237,0.4); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(124,58,237,0.6); }

/* ── Utility ──────────────────────────────────────────────── */
.hidden { display: none !important; }
.flex    { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.gap-6 { gap: 24px; }
.w-full { width: 100%; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.p-4 { padding: 16px; }
.p-6 { padding: 24px; }
.rounded { border-radius: var(--radius-sm); }
.rounded-lg { border-radius: var(--radius); }
.rounded-xl { border-radius: var(--radius-lg); }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.opacity-50 { opacity: 0.5; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-accent { color: var(--accent); }
.text-primary-color { color: var(--primary-light); }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 1024px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 99;
  }
  .sidebar-overlay.active { display: block; }
}
@media (max-width: 768px) {
  .navbar-links { display: none; }
  .hamburger { display: flex; }
  .hero { padding: 100px 20px 60px; }
  .pricing-card.featured { transform: scale(1); }
  .features-grid { grid-template-columns: 1fr; }
  .page-body { padding: 20px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-stats { gap: 24px; }
}
@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
}