/* ==========================================================================
   DEUTSCHMEISTER - CORSO DI TEDESCO A1-C1
   Design System & Stili Globali Premium
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');

:root {
  /* Color Palette */
  --bg-main: #0a0e17;
  --bg-surface: #111827;
  --bg-surface-elevated: #1a2234;
  --bg-surface-hover: #222d42;
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --border-glow: rgba(245, 158, 11, 0.35);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* Brand Accents */
  --gold-500: #f59e0b;
  --gold-400: #fbbf24;
  --gold-glow: rgba(245, 158, 11, 0.25);
  
  --crimson-500: #ef4444;
  --emerald-500: #10b981;
  --emerald-glow: rgba(16, 185, 129, 0.2);
  --cyan-500: #06b6d4;
  --purple-500: #8b5cf6;

  /* German Gender Colors */
  --gender-maskulin: #3b82f6; /* der */
  --gender-feminin: #ec4899;  /* die */
  --gender-neutral: #10b981;  /* das */
  --gender-plural: #f59e0b;   /* die Pl. */

  /* Shadows & Glass */
  --glass-bg: rgba(17, 24, 39, 0.75);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-blur: blur(14px);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.5);

  /* Geometry & Transition */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 9999px;
  --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-main: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-surface-hover: #e2e8f0;
  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.16);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(0, 0, 0, 0.08);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
}

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

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

a {
  color: inherit;
  text-decoration: none;
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

/* App Header & Navbar */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.85rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition-normal);
}

.brand-container {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.brand-badge {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #000000 0%, #dd0000 50%, #ffce00 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  font-size: 1.25rem;
}

.brand-title {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
}

.brand-title span {
  color: var(--gold-400);
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Level Indicator Chips */
.level-nav {
  display: flex;
  align-items: center;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  padding: 0.25rem;
  gap: 0.25rem;
}

.level-btn {
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: var(--transition-fast);
}

.level-btn:hover {
  color: var(--text-primary);
  background: var(--bg-surface-hover);
}

.level-btn.active {
  color: #0f172a;
  background: var(--gold-400);
  box-shadow: 0 2px 10px var(--gold-glow);
}

/* Action Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem 1.2rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--gold-500) 0%, #d97706 100%);
  color: #0f172a;
  box-shadow: 0 4px 14px var(--gold-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--gold-glow);
  filter: brightness(1.05);
}

.btn-secondary {
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

.btn-secondary:hover {
  background: var(--bg-surface-hover);
  border-color: var(--border-strong);
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-md);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-icon:hover {
  color: var(--text-primary);
  background: var(--bg-surface-hover);
  border-color: var(--border-strong);
}

/* Main Container */
.main-wrapper {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

/* Hero Section */
.hero-banner {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.12) 0%, rgba(17, 24, 39, 0.8) 60%),
              radial-gradient(circle at top right, rgba(6, 182, 212, 0.15), transparent 50%);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 3rem 2.5rem;
  margin-bottom: 2.5rem;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.hero-content {
  max-width: 760px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: var(--gold-400);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: var(--radius-pill);
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 2.75rem;
  line-height: 1.15;
  margin-bottom: 1rem;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, #ffffff 0%, var(--gold-400) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 2rem;
}

/* Stats Ribbon */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.stat-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-fast);
}

.stat-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
}

.stat-icon-wrapper {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.stat-icon-gold { background: rgba(245, 158, 11, 0.15); color: var(--gold-400); }
.stat-icon-emerald { background: rgba(16, 185, 129, 0.15); color: var(--emerald-500); }
.stat-icon-cyan { background: rgba(6, 182, 212, 0.15); color: var(--cyan-500); }
.stat-icon-purple { background: rgba(139, 92, 246, 0.15); color: var(--purple-500); }

.stat-number {
  font-size: 1.4rem;
  font-weight: 800;
  line-height: 1.1;
  font-family: 'Outfit', sans-serif;
}

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

/* Level Cards Roadmap */
.roadmap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.level-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  position: relative;
  overflow: hidden;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.level-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

.level-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
}

.level-card.a1::before { background: linear-gradient(90deg, #10b981, #06b6d4); }
.level-card.a2::before { background: linear-gradient(90deg, #06b6d4, #3b82f6); }
.level-card.b1::before { background: linear-gradient(90deg, #3b82f6, #8b5cf6); }
.level-card.b2::before { background: linear-gradient(90deg, #8b5cf6, #f59e0b); }
.level-card.c1::before { background: linear-gradient(90deg, #f59e0b, #ef4444); }

.level-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.level-tag-badge {
  font-size: 1.15rem;
  font-weight: 800;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-sm);
  background: var(--bg-surface-elevated);
  font-family: 'Outfit', sans-serif;
}

.level-card-title {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
}

.level-card-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.progress-track {
  background: var(--bg-surface-elevated);
  height: 8px;
  border-radius: var(--radius-pill);
  overflow: hidden;
  margin-bottom: 0.75rem;
}

.progress-fill {
  background: linear-gradient(90deg, var(--gold-500), var(--emerald-500));
  height: 100%;
  width: 0%;
  border-radius: var(--radius-pill);
  transition: width 0.6s ease;
}

.progress-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

/* Days List Grid */
.days-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 1.25rem;
}

.day-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.35rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition-fast);
  position: relative;
}

.day-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.day-card.completed {
  border-color: rgba(16, 185, 129, 0.4);
  background: linear-gradient(180deg, rgba(16, 185, 129, 0.05) 0%, var(--bg-surface) 100%);
}

.day-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.day-number {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--gold-400);
}

.status-indicator {
  font-size: 0.75rem;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-pill);
  background: var(--bg-surface-elevated);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.status-indicator.done {
  background: rgba(16, 185, 129, 0.2);
  color: var(--emerald-500);
  font-weight: 600;
}

.day-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.day-topics {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1.2rem;
}

.day-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border-subtle);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
  padding: 0.9rem 1.4rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: auto;
}

.toast-success {
  border-color: rgba(16, 185, 129, 0.4);
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), var(--bg-surface-elevated));
}

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

/* Responsive adjustments */
@media (max-width: 768px) {
  .app-header {
    padding: 0.85rem 1rem;
    flex-wrap: wrap;
    gap: 0.75rem;
  }
  .hero-title {
    font-size: 2rem;
  }
  .main-wrapper {
    padding: 1.5rem 1rem 3rem;
  }
}

/* Microphone & Audio Buttons (Global High Contrast) */
.mic-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, #dc2626 0%, #991b1b 100%) !important;
  color: #ffffff !important;
  border: 1px solid rgba(255, 255, 255, 0.2) !important;
  font-weight: 700 !important;
  font-size: 0.95rem !important;
  cursor: pointer;
  transition: var(--transition-fast);
  box-shadow: 0 4px 14px rgba(220, 38, 38, 0.4);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
}

.mic-btn span, .mic-btn * {
  color: #ffffff !important;
  font-weight: 700 !important;
}

.mic-btn:hover {
  background: linear-gradient(135deg, #ef4444 0%, #b91c1c 100%) !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(220, 38, 38, 0.6);
}

.mic-btn.listening {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%) !important;
  box-shadow: 0 0 18px rgba(16, 185, 129, 0.8) !important;
  animation: micPulse 1.2s infinite alternate;
}

@keyframes micPulse {
  0% { transform: scale(1); box-shadow: 0 0 8px rgba(16, 185, 129, 0.5); }
  100% { transform: scale(1.02); box-shadow: 0 0 22px rgba(16, 185, 129, 0.9); }
}

.audio-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--gold-400);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.audio-btn:hover {
  background: var(--gold-400);
  color: #0f172a;
  transform: scale(1.1);
}