/* ============================================================
   DeutschMeister — Design System
   ============================================================ */

/* ── CSS Variables (Defaults: Midnight Purple) ──────────────── */
:root {
  --bg-deep:       #0d0317;
  --bg-card:       rgba(25, 9, 48, 0.65);
  --bg-card-hover: rgba(36, 14, 68, 0.85);
  --bg-input:      rgba(0, 0, 0, 0.4);
  --panel-border:  rgba(139, 92, 246, 0.25);

  --text-primary:   #fdfcff;
  --text-secondary: #c4b5fd;
  --text-muted:     #8b5cf6;

  --accent-1:       #a78bfa; /* Vibrant Purple */
  --accent-2:       #fde047; /* Bright Gold */
  --accent-3:       #38bdf8; /* Vibrant Blue */

  --success: #10b981;
  --warning: #f59e0b;
  --danger:  #ef4444;

  --shadow-sm: 0 4px 12px rgba(0,0,0,.35);
  --shadow-md: 0 10px 30px rgba(0,0,0,.5);
  --shadow-xl: 0 20px 45px rgba(0,0,0,.65);
  --shadow-glow: 0 0 35px rgba(139,92,246,0.5);
  --shadow-glow-purple: 0 0 25px rgba(139,92,246,0.4);
  --shadow-glow-gold: 0 0 25px rgba(245,158,11,0.4);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 30px;
  --radius-full: 9999px;

  --nav-height:    66px;
  --header-height: 58px;
  --sidebar-width: 270px;
  --transition:    .28s cubic-bezier(0.16, 1, 0.3, 1);
  --bg-sidebar:    rgba(14, 4, 27, 0.96);
}

/* ── Theme Definitions ──────────────────────────────────────── */

/* Midnight Purple (Default) */
.theme-midnight, :root:not([class*="theme-"]) {
  /* Inherits defaults from :root */
}

/* Light Mode (Eye-Relaxing Paper) */
.theme-light {
  --bg-deep:       #f5f7fa;
  --bg-sidebar:    #ffffff;
  --bg-card:       #ffffff;
  --bg-card-hover: #fcfdfe;
  --bg-input:      #ebedf0;
  --panel-border:  rgba(0, 0, 0, 0.08);

  --text-primary:   #1f2937;
  --text-secondary: #4b5563;
  --text-muted:     #9ca3af;

  --accent-1:       #3b82f6; /* Blue */
  --accent-2:       #f59e0b; /* Amber */
  --accent-3:       #8b5cf6; /* Violet */
  
  --shadow-md: 0 4px 12px rgba(0,0,0,.08);
}

/* Dark Neon (High Contrast) */
.theme-neon {
  --bg-deep:       #000000;
  --bg-sidebar:    #050505;
  --bg-card:       #111111;
  --bg-card-hover: #1a1a1a;
  --bg-input:      #080808;
  --panel-border:  rgba(255, 255, 255, 0.15);

  --text-primary:   #ffffff;
  --text-secondary: #cccccc;
  --text-muted:     #888888;

  --accent-1:       #ff007f; /* Neon Pink */
  --accent-2:       #00f3ff; /* Neon Cyan */
  --accent-3:       #bc13fe; /* Neon Purple */
}

/* Ocean Blue (Relaxing) */
.theme-ocean {
  --bg-deep:       #021024;
  --bg-sidebar:    #03162f;
  --bg-card:       #052440;
  --bg-card-hover: #072e52;
  --bg-input:      #010c1c;
  --panel-border:  rgba(14, 165, 233, 0.15);

  --text-primary:   #e0f2fe;
  --text-secondary: #7dd3fc;
  --text-muted:     #38bdf8;

  --accent-1:       #0ea5e9; /* Sky Blue */
  --accent-2:       #2dd4bf; /* Teal */
  --accent-3:       #f59e0b; /* Gold */
}

/* Forest Green (Nature) */
.theme-forest {
  --bg-deep:       #051a14;
  --bg-sidebar:    #06241b;
  --bg-card:       #0a2f25;
  --bg-card-hover: #0d3a2d;
  --bg-input:      #03120e;
  --panel-border:  rgba(16, 185, 129, 0.15);

  --text-primary:   #ecfdf5;
  --text-secondary: #6ee7b7;
  --text-muted:     #34d399;

  --accent-1:       #10b981; /* Emerald */
  --accent-2:       #fbbf24; /* Amber */
  --accent-3:       #3b82f6; /* Blue */
}

/* Sunset Warm (Deep Amber) */
.theme-sunset {
  --bg-deep:       #1a0f0f;
  --bg-sidebar:    #241515;
  --bg-card:       #311b1b;
  --bg-card-hover: #3d2222;
  --bg-input:      #120a0a;
  --panel-border:  rgba(249, 115, 22, 0.15);

  --text-primary:   #fff7ed;
  --text-secondary: #fdba74;
  --text-muted:     #f97316;

  --accent-1:       #f97316; /* Orange */
  --accent-2:       #ef4444; /* Red */
  --accent-3:       #fbbf24; /* Amber */
}

/* Legacy variable mappings & Motion Graphics */
:root {
  --accent-gold:   #f59e0b;
  --accent-purple: #8b5cf6;
  --accent-blue:   #3b82f6;
  --grad-gold:   linear-gradient(135deg, #f59e0b, #f97316);
  --grad-purple: linear-gradient(135deg, #8b5cf6, #6366f1);
  --grad-blue:   linear-gradient(135deg, #3b82f6, #06b6d4);
  --grad-main:     var(--grad-purple);
  --grad-hero:   linear-gradient(135deg, #8b5cf6, #3b82f6);
  --grad-accent:   var(--grad-gold);
}

/* ── Background Blobs ──────────────────────────────────────── */
.blob {
  position: fixed;
  border-radius: 50%;
  filter: blur(100px);
  opacity: .5;
  z-index: -1;
  pointer-events: none;
  animation: blobFloat 12s ease-in-out infinite alternate;
}
.blob-1 { width: 600px; height: 600px; background: var(--accent-1); top: -250px; left: -150px; }
.blob-2 { width: 500px; height: 500px; background: var(--accent-2); bottom: -180px; right: -80px; animation-delay: -5s; }
.blob-3 { width: 400px; height: 400px; background: var(--accent-3); top: 35%; left: 40%; opacity: 0.12; animation-delay: -10s; }

@keyframes blobFloat {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(50px, 80px) scale(1.15); }
}

/* ── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', sans-serif;
  background: var(--bg-deep);
  color: var(--text-primary);
  min-height: 100dvh;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
button { cursor: pointer; font-family: inherit; }
input, textarea, select { font-family: inherit; }
img { max-width: 100%; display: block; }


.header-inner {
  max-width: 780px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.25rem;
}
.logo { display: flex; align-items: center; gap: .5rem; }
.logo-flag { font-size: 1.4rem; }
.logo-text { font-size: 1.2rem; font-weight: 800; letter-spacing: -.03em; }
.logo-accent { color: var(--accent-gold); }

.header-stats {
  display: flex;
  align-items: center;
  gap: .85rem;
}
.stat-chip {
  display: flex;
  align-items: center;
  gap: .3rem;
  font-size: .82rem;
  font-weight: 700;
  padding: .25rem .6rem;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,.07);
  border: 1px solid var(--panel-border);
}
.stat-chip.streak { color: #fb923c; }
.stat-chip.hearts { color: var(--danger); }
.stat-chip.xp    { color: var(--accent-gold); }

/* ── Bottom Nav ────────────────────────────────────────────── */
.bottom-nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: rgba(10,14,26,.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--panel-border);
  display: flex;
  align-items: center;
  z-index: 100;
  padding-bottom: env(safe-area-inset-bottom);
}
.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .25rem;
  padding: .5rem 0;
  color: var(--text-muted);
  font-size: .7rem;
  font-weight: 600;
  transition: color var(--transition);
}
.nav-item i { font-size: 1.2rem; transition: transform var(--transition); }
.nav-item.active { color: var(--accent-gold); }
.nav-item.active i { transform: scale(1.1); }
.nav-ai { position: relative; }
.nav-ai i {
  background: var(--grad-purple);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.nav-ai.active { color: var(--accent-purple); }

/* ── Main Content ──────────────────────────────────────────── */
.app-main {
  position: relative;
  z-index: 1;
  padding: 1.5rem 2rem 2rem;
  min-height: 100dvh;
  transition: opacity .18s ease, transform .18s ease;
  will-change: opacity, transform;
}

.app-main.fade-out {
  opacity: 0;
  transform: translateY(8px) scale(0.985);
  pointer-events: none;
}

/* ── Page Progress Bar ─────────────────────────────────────── */
#page-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0%;
  background: var(--grad-gold);
  z-index: 9999;
  opacity: 0;
  transition: width .35s ease, opacity .25s ease;
  border-radius: 0 2px 2px 0;
  box-shadow: 0 0 8px rgba(245,158,11,.6);
}

/* ── Loading Screen ────────────────────────────────────────── */
.loading-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 70vh;
  gap: 1rem;
}
.loading-logo { font-size: 4rem; animation: pulse 1.5s ease-in-out infinite; }
.loading-text  { font-size: 1.5rem; font-weight: 800; color: var(--accent-gold); }
.loading-spinner {
  width: 32px; height: 32px;
  border: 3px solid rgba(255,255,255,.1);
  border-top-color: var(--accent-gold);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}
@keyframes spin  { to { transform: rotate(360deg); } }
@keyframes pulse { 0%,100% { transform: scale(1); } 50% { transform: scale(1.08); } }

/* ── Glass Card ────────────────────────────────────────────── */
.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 1.25rem;
  transition: background var(--transition), border-color var(--transition);
}
.glass-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255,255,255,.1);
}

/* ── Section Label ─────────────────────────────────────────── */
.section-label {
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: .75rem;
}

/* ── Gradient Text ─────────────────────────────────────────── */
.gradient-text-gold   { background: var(--grad-gold);   -webkit-background-clip: text; background-clip: text; color: transparent; }
.gradient-text-purple { background: var(--grad-purple); -webkit-background-clip: text; background-clip: text; color: transparent; }
.gradient-text-blue   { background: var(--grad-blue);   -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .6rem;
  padding: .85rem 1.75rem;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: .95rem;
  border: 1px solid transparent;
  outline: none;
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
  transition: all .3s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.btn:active {
  transform: translateY(0) scale(0.96);
}

.btn-primary {
  background: var(--grad-gold);
  color: #000;
  border: none;
  font-weight: 800;
  box-shadow: 0 4px 18px 0 rgba(245, 158, 11, 0.45);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(245, 158, 11, 0.6);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  color: var(--text-primary);
  border: 1px solid var(--panel-border);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-purple {
  background: var(--grad-purple);
  color: #fff;
  box-shadow: 0 4px 18px rgba(139, 92, 246, 0.4);
}
.btn-purple:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(139, 92, 246, 0.55);
}

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.btn-success {
  background: var(--success);
  color: #fff;
}

.btn-block { width: 100%; }
.btn-sm { padding: .5rem 1.1rem; font-size: .85rem; border-radius: var(--radius-sm); }
.btn-lg { padding: 1.1rem 2.2rem; font-size: 1.05rem; }
.btn-icon { padding: .7rem; border-radius: var(--radius-md); aspect-ratio: 1; }

.btn:disabled { 
  opacity: .5; 
  cursor: not-allowed; 
  transform: none !important; 
  box-shadow: none !important;
}

/* ── XP Bar ────────────────────────────────────────────────── */
.xp-bar-wrap {
  background: rgba(255,255,255,.07);
  border-radius: var(--radius-full);
  height: 8px;
  overflow: hidden;
  margin-top: .4rem;
}
.xp-bar-fill {
  height: 100%;
  background: var(--grad-gold);
  border-radius: var(--radius-full);
  transition: width .6s cubic-bezier(.4,0,.2,1);
}

/* ── Hearts ────────────────────────────────────────────────── */
.hearts-row { display: flex; gap: .25rem; }
.heart { font-size: 1.1rem; transition: transform .2s; }
.heart.empty { opacity: .25; filter: grayscale(1); }
.heart.lost { animation: heartLost .4s ease-out; }
@keyframes heartLost {
  0%  { transform: scale(1.4); }
  50% { transform: scale(.8); }
  100%{ transform: scale(1); }
}

/* ── Streak Badge ──────────────────────────────────────────── */
.streak-badge {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  font-weight: 800;
  color: #fb923c;
}
.streak-fire { animation: fireWiggle 1.5s ease-in-out infinite; display: inline-block; }
@keyframes fireWiggle {
  0%,100% { transform: rotate(-5deg) scale(1); }
  50%      { transform: rotate(5deg) scale(1.1); }
}

/* ── Flashcard ─────────────────────────────────────────────── */
.flashcard-scene {
  perspective: 900px;
  width: 100%;
  height: 220px;
  margin: 1.5rem 0;
  cursor: pointer;
}
.flashcard {
  width: 100%; height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform .55s cubic-bezier(.4,0,.2,1);
  border-radius: var(--radius-lg);
}
.flashcard.flipped { transform: rotateY(180deg); }
.flashcard-front, .flashcard-back {
  position: absolute; inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  border: 1px solid var(--panel-border);
}
.flashcard-front { background: var(--bg-card); }
.flashcard-back  { background: rgba(16,185,129,.12); border-color: rgba(16,185,129,.3); transform: rotateY(180deg); }
.card-word { font-size: 2rem; font-weight: 800; }
.card-hint { font-size: .85rem; color: var(--text-muted); margin-top: .5rem; }
.card-translation { font-size: 1.5rem; font-weight: 700; color: var(--success); }
.card-example { font-size: .9rem; color: var(--text-secondary); margin-top: .75rem; text-align: center; font-style: italic; }

/* ── Lesson Steps ──────────────────────────────────────────── */
.lesson-progress {
  display: flex;
  gap: .35rem;
  margin-bottom: 1.5rem;
}
.lesson-step-dot {
  flex: 1;
  height: 5px;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,.1);
  transition: background var(--transition);
}
.lesson-step-dot.done    { background: var(--success); }
.lesson-step-dot.current { background: var(--accent-gold); }

.lesson-card {
  background: var(--bg-card);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  text-align: center;
  animation: fadeUp .35s ease;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

.lesson-german-word {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--text-primary);
  letter-spacing: -.04em;
  line-height: 1.1;
}
.lesson-article { font-size: 1.5rem; color: var(--accent-gold); font-weight: 700; }
.lesson-english  { font-size: 1.1rem; color: var(--text-secondary); margin-top: .5rem; }
.lesson-example  { font-size: .95rem; color: var(--text-muted); margin-top: 1rem; font-style: italic; line-height: 1.5; }

/* MCQ Options */
.mcq-options { display: flex; flex-direction: column; gap: .75rem; margin-top: 1.5rem; }
.mcq-option {
  padding: 1rem 1.25rem;
  background: rgba(255,255,255,.05);
  border: 1.5px solid var(--panel-border);
  border-radius: var(--radius-md);
  text-align: left;
  color: var(--text-primary);
  font-size: .95rem;
  font-weight: 500;
  transition: all var(--transition);
}
.mcq-option:hover { background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.2); }
.mcq-option.correct { background: rgba(16,185,129,.15); border-color: var(--success); color: var(--success); }
.mcq-option.wrong   { background: rgba(239,68,68,.15); border-color: var(--danger); color: var(--danger); }

/* Word tiles */
.word-tiles { display: flex; flex-wrap: wrap; gap: .5rem; justify-content: center; margin: 1rem 0; }
.word-tile {
  padding: .5rem 1rem;
  background: rgba(139,92,246,.15);
  border: 1.5px solid rgba(139,92,246,.35);
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  user-select: none;
}
.word-tile:hover { background: rgba(139,92,246,.28); }
.word-tile.placed { opacity: .35; cursor: default; }
.word-tile.correct { background: rgba(16,185,129,.2); border-color: var(--success); }
.word-tile.wrong   { background: rgba(239,68,68,.2);  border-color: var(--danger); }

/* Answer area */
.answer-zone {
  min-height: 52px;
  border: 2px dashed rgba(255,255,255,.15);
  border-radius: var(--radius-md);
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  padding: .5rem;
  margin: 1rem 0;
  transition: border-color var(--transition);
}
.answer-zone.active { border-color: var(--accent-purple); }

/* ── Chat Bubbles ──────────────────────────────────────────── */
.chat-messages {
  display: flex;
  flex-direction: column;
  gap: .75rem;
  padding: 1rem 0;
}
.bubble {
  max-width: 82%;
  padding: .75rem 1rem;
  border-radius: var(--radius-lg);
  font-size: .93rem;
  line-height: 1.55;
  animation: bubbleIn .28s ease;
}
@keyframes bubbleIn {
  from { opacity: 0; transform: scale(.96) translateY(8px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}
.bubble-ai {
  align-self: flex-start;
  background: var(--bg-card);
  border: 1px solid var(--panel-border);
  border-bottom-left-radius: .35rem;
}
.bubble-user {
  align-self: flex-end;
  background: var(--grad-purple);
  color: #fff;
  border-bottom-right-radius: .35rem;
}
.bubble-correction {
  align-self: flex-start;
  background: rgba(245,158,11,.1);
  border: 1px solid rgba(245,158,11,.3);
  font-size: .85rem;
  color: var(--accent-gold);
  border-radius: var(--radius-md);
  padding: .6rem .9rem;
}

/* Typing indicator */
.typing-indicator {
  display: flex;
  gap: .25rem;
  align-items: center;
  padding: .75rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  width: fit-content;
  border-bottom-left-radius: .35rem;
}
.typing-dot {
  width: 7px; height: 7px;
  background: var(--text-muted);
  border-radius: 50%;
  animation: typingBounce 1.2s ease-in-out infinite;
}
.typing-dot:nth-child(2) { animation-delay: .2s; }
.typing-dot:nth-child(3) { animation-delay: .4s; }
@keyframes typingBounce {
  0%,60%,100% { transform: translateY(0); opacity: .5; }
  30%          { transform: translateY(-6px); opacity: 1; }
}

/* ── Chat Input Bar ────────────────────────────────────────── */
.chat-input-bar {
  display: flex;
  gap: .5rem;
  padding: .75rem;
  background: rgba(10,14,26,.9);
  border-top: 1px solid var(--panel-border);
  position: sticky;
  bottom: var(--nav-height);
}
.chat-input {
  flex: 1;
  background: var(--bg-input);
  border: 1.5px solid var(--panel-border);
  border-radius: var(--radius-full);
  padding: .65rem 1.1rem;
  color: var(--text-primary);
  font-size: .95rem;
  outline: none;
  transition: border-color var(--transition);
}
.chat-input:focus { border-color: var(--accent-purple); }

/* ── Diff Highlight (Grammar Corrector) ────────────────────── */
.diff-wrong   { color: var(--danger); text-decoration: line-through; }
.diff-correct { color: var(--success); font-weight: 700; }
.error-card {
  background: rgba(239,68,68,.07);
  border: 1px solid rgba(239,68,68,.2);
  border-radius: var(--radius-md);
  padding: .75rem 1rem;
  margin-top: .5rem;
}
.error-card-label { font-size: .75rem; font-weight: 700; color: var(--danger); text-transform: uppercase; letter-spacing: .08em; }
.error-card-explanation { font-size: .88rem; color: var(--text-secondary); margin-top: .3rem; line-height: 1.5; }

/* ── Skeleton Loader ───────────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg, rgba(255,255,255,.04) 25%, rgba(255,255,255,.09) 50%, rgba(255,255,255,.04) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
  border-radius: var(--radius-sm);
}
@keyframes shimmer { from { background-position: 200% 0; } to { background-position: -200% 0; } }

/* ── Waveform (Pronunciation) ──────────────────────────────── */
.waveform {
  display: flex;
  align-items: center;
  gap: 3px;
  height: 32px;
}
.wave-bar {
  width: 4px;
  background: var(--accent-gold);
  border-radius: 2px;
  animation: wavePulse 1.2s ease-in-out infinite;
}
.wave-bar:nth-child(2) { animation-delay: .15s; }
.wave-bar:nth-child(3) { animation-delay: .3s; }
.wave-bar:nth-child(4) { animation-delay: .45s; }
.wave-bar:nth-child(5) { animation-delay: .6s; }
@keyframes wavePulse {
  0%,100% { height: 6px; opacity: .4; }
  50%      { height: 28px; opacity: 1; }
}

/* ── Score Ring ────────────────────────────────────────────── */
.score-ring-wrap { display: flex; flex-direction: column; align-items: center; gap: .5rem; }
.score-ring-svg { transform: rotate(-90deg); }
.score-ring-track { fill: none; stroke: rgba(255,255,255,.08); }
.score-ring-fill  { fill: none; stroke: var(--accent-gold); stroke-linecap: round; transition: stroke-dashoffset 1s ease; }
.score-ring-label { font-size: 1.8rem; font-weight: 900; color: var(--accent-gold); }

/* ── Suggestion Chips ──────────────────────────────────────── */
.chips-row { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: .75rem; }
.chip {
  padding: .4rem .85rem;
  background: rgba(255,255,255,.06);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-full);
  font-size: .8rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.chip:hover { background: rgba(139,92,246,.15); border-color: rgba(139,92,246,.4); color: var(--text-primary); }

/* ── Modern Input ──────────────────────────────────────────── */
.modern-input, .modern-textarea, .modern-select {
  width: 100%;
  background: var(--bg-input);
  border: 1.5px solid var(--panel-border);
  border-radius: var(--radius-md);
  padding: .75rem 1rem;
  color: var(--text-primary);
  font-size: .95rem;
  outline: none;
  transition: border-color var(--transition);
  font-family: inherit;
}
.modern-input:focus, .modern-textarea:focus, .modern-select:focus { border-color: var(--accent-gold); }
.modern-textarea { resize: vertical; min-height: 120px; line-height: 1.55; }
.modern-select option { background: #1e2a45; }

.input-group { display: flex; flex-direction: column; gap: .4rem; }
.input-label { font-size: .82rem; font-weight: 600; color: var(--text-secondary); }

/* ── Progress Path ─────────────────────────────────────────── */
.lesson-path { display: flex; flex-direction: column; gap: .5rem; }
.path-lesson {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: .9rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}
.path-lesson:hover:not(.locked) { border-color: rgba(255,255,255,.2); transform: translateX(4px); }
.path-lesson.locked { opacity: .45; cursor: not-allowed; }
.path-lesson.completed { border-color: rgba(16,185,129,.3); }
.path-lesson.current   { border-color: rgba(245,158,11,.4); background: rgba(245,158,11,.05); }
.path-icon { font-size: 1.5rem; width: 2.5rem; text-align: center; flex-shrink: 0; }
.path-info { flex: 1; }
.path-title { font-weight: 700; font-size: .95rem; }
.path-sub { font-size: .78rem; color: var(--text-muted); margin-top: .15rem; }
.path-bar { flex-shrink: 0; width: 60px; }

/* ── AI Feature Cards ──────────────────────────────────────── */
.ai-features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .75rem;
  margin: .75rem 0;
}
.ai-feature-card {
  background: var(--bg-card);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  padding: 1.1rem;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  cursor: pointer;
  transition: all var(--transition);
}
.ai-feature-card:hover { border-color: rgba(139,92,246,.4); transform: translateY(-3px); box-shadow: var(--shadow-glow-purple); }
.ai-feature-icon {
  width: 42px; height: 42px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: #fff;
}
.ai-feature-title { font-weight: 700; font-size: .9rem; }
.ai-feature-sub   { font-size: .76rem; color: var(--text-muted); line-height: 1.4; }

/* ── Quick Practice Grid ───────────────────────────────────── */
.practice-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .6rem;
}
.practice-card {
  background: var(--bg-card);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  padding: .9rem .5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .35rem;
  cursor: pointer;
  transition: all var(--transition);
  font-size: .75rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-align: center;
}
.practice-card:hover { border-color: rgba(255,255,255,.2); color: var(--text-primary); transform: translateY(-2px); }
.practice-card i { font-size: 1.3rem; }

/* ── Daily Challenge ───────────────────────────────────────── */
.challenge-card {
  background: linear-gradient(135deg, rgba(245,158,11,.12), rgba(249,115,22,.08));
  border: 1px solid rgba(245,158,11,.3);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  cursor: pointer;
  transition: all var(--transition);
}
.challenge-card:hover { border-color: rgba(245,158,11,.6); box-shadow: var(--shadow-glow-gold); }
.challenge-card.completed { opacity: .55; cursor: default; }
.challenge-info h4 { font-size: 1rem; font-weight: 700; color: var(--accent-gold); }
.challenge-info p  { font-size: .83rem; color: var(--text-secondary); margin-top: .25rem; }
.challenge-xp {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .2rem;
  flex-shrink: 0;
}
.challenge-xp-value { font-size: 1.3rem; font-weight: 900; color: var(--accent-gold); }
.challenge-xp-label { font-size: .7rem; color: var(--text-muted); }

/* ── Markdown Render (Tutor) ───────────────────────────────── */
.md-content { line-height: 1.65; font-size: .93rem; }
.md-content h1,.md-content h2,.md-content h3 { margin: 1rem 0 .5rem; font-weight: 700; }
.md-content p   { margin-bottom: .75rem; }
.md-content strong { color: var(--accent-gold); }
.md-content em { color: var(--text-secondary); font-style: italic; }
.md-content ul,.md-content ol { padding-left: 1.25rem; margin-bottom: .75rem; }
.md-content li { margin-bottom: .3rem; }
.md-content table { border-collapse: collapse; width: 100%; margin-bottom: .75rem; font-size: .88rem; }
.md-content th,.md-content td { border: 1px solid var(--panel-border); padding: .4rem .75rem; text-align: left; }
.md-content th { background: rgba(255,255,255,.06); font-weight: 700; }
.md-content code { background: rgba(255,255,255,.08); border-radius: var(--radius-sm); padding: .15rem .4rem; font-family: 'Courier New', monospace; font-size: .85em; color: var(--accent-cyan); }
.md-content pre { background: rgba(0,0,0,.35); border-radius: var(--radius-md); padding: 1rem; overflow-x: auto; margin-bottom: .75rem; }
.md-content pre code { background: none; padding: 0; }

/* ── Toast ─────────────────────────────────────────────────── */
#toast-container { position: fixed; bottom: calc(var(--nav-height) + 1rem); right: 1rem; display: flex; flex-direction: column; gap: .5rem; z-index: 500; }
.toast {
  padding: .75rem 1.25rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: .9rem;
  box-shadow: var(--shadow-md);
  transform: translateX(120%);
  opacity: 0;
  transition: all .35s cubic-bezier(.34,1.56,.64,1);
  max-width: 300px;
}
.toast.show { transform: translateX(0); opacity: 1; }
.toast.success { background: var(--success); color: #000; }
.toast.error   { background: var(--danger); color: #fff; }
.toast.info    { background: var(--accent-purple); color: #fff; }
.toast.warning { background: var(--warning); color: #000; }

/* ── XP Popup ──────────────────────────────────────────────── */
.xp-popup {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  font-size: 2rem;
  font-weight: 900;
  color: var(--accent-gold);
  text-shadow: 0 0 30px rgba(245,158,11,.8);
  pointer-events: none;
  z-index: 600;
  opacity: 0;
  transition: none;
}
.xp-popup.show {
  animation: xpBurst .8s cubic-bezier(.36,.07,.19,.97) forwards;
}
@keyframes xpBurst {
  0%   { opacity: 0; transform: translate(-50%,-50%) scale(0); }
  40%  { opacity: 1; transform: translate(-50%,-70%) scale(1.3); }
  70%  { opacity: 1; transform: translate(-50%,-80%) scale(1); }
  100% { opacity: 0; transform: translate(-50%,-120%) scale(.8); }
}

/* ── Modal ─────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.75);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 400;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
  padding: 1.5rem;
}
.modal-overlay.open { opacity: 1; pointer-events: auto; }
.modal-box {
  background: #111827;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow-md);
  transform: scale(.94);
  transition: transform var(--transition);
}
.modal-overlay.open .modal-box { transform: scale(1); }
.modal-header { padding: 1.25rem 1.5rem .75rem; border-bottom: 1px solid var(--panel-border); }
.modal-header h3 { font-size: 1.1rem; font-weight: 700; }
.modal-body { padding: 1.25rem 1.5rem; }
.modal-footer { padding: .75rem 1.5rem 1.25rem; display: flex; gap: .75rem; justify-content: flex-end; border-top: 1px solid var(--panel-border); }

/* ── Results Screen ────────────────────────────────────────── */
.results-screen { text-align: center; padding: 2rem 1rem; animation: fadeUp .4s ease; }
.results-emoji  { font-size: 4rem; margin-bottom: 1rem; }
.results-title  { font-size: 1.8rem; font-weight: 900; margin-bottom: .5rem; }
.results-stats  { display: grid; grid-template-columns: repeat(3,1fr); gap: .75rem; margin: 1.5rem 0; }
.result-stat-box {
  background: var(--bg-card);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  padding: 1rem .5rem;
  text-align: center;
}
.result-stat-value { font-size: 1.4rem; font-weight: 800; color: var(--accent-gold); }
.result-stat-label { font-size: .72rem; color: var(--text-muted); margin-top: .2rem; text-transform: uppercase; letter-spacing: .06em; }

/* ── Story Reader ──────────────────────────────────────────── */
.story-text { font-size: 1rem; line-height: 1.85; color: var(--text-primary); }
.story-word { cursor: pointer; border-bottom: 1px dashed rgba(255,255,255,.2); transition: color var(--transition); }
.story-word:hover { color: var(--accent-gold); border-bottom-color: var(--accent-gold); }
.word-tooltip {
  position: fixed;
  background: #1e2a45;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  padding: .4rem .75rem;
  font-size: .82rem;
  font-weight: 600;
  color: var(--accent-gold);
  z-index: 300;
  pointer-events: none;
  transition: opacity .2s;
}

/* ── Achievement Badge ─────────────────────────────────────── */
.achievements-row { display: flex; gap: .75rem; overflow-x: auto; padding-bottom: .5rem; }
.achievement-badge {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .35rem;
  padding: .75rem;
  background: var(--bg-card);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  width: 80px;
  text-align: center;
}
.achievement-badge.unlocked { border-color: rgba(245,158,11,.4); background: rgba(245,158,11,.06); }
.achievement-badge.locked { opacity: .35; filter: grayscale(1); }
.badge-icon { font-size: 1.5rem; }
.badge-name { font-size: .65rem; font-weight: 700; color: var(--text-muted); line-height: 1.3; }

/* ── Scenario Picker ───────────────────────────────────────── */
.scenario-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .6rem;
  margin-bottom: 1rem;
}
.scenario-card {
  padding: .85rem;
  background: var(--bg-card);
  border: 1.5px solid var(--panel-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}
.scenario-card:hover { border-color: rgba(139,92,246,.4); }
.scenario-card.active { border-color: var(--accent-purple); background: rgba(139,92,246,.1); }
.scenario-icon { font-size: 1.4rem; margin-bottom: .25rem; }
.scenario-name { font-size: .8rem; font-weight: 600; }

/* ── Vocabulary List ───────────────────────────────────────── */
.vocab-list { display: flex; flex-direction: column; gap: .5rem; }
.vocab-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: .65rem .9rem;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm);
}
.vocab-de   { font-weight: 700; font-size: .95rem; }
.vocab-en   { font-size: .88rem; color: var(--text-secondary); }
.vocab-gender { font-size: .75rem; font-weight: 700; padding: .15rem .4rem; border-radius: var(--radius-full); }
.vocab-gender.m { background: rgba(59,130,246,.2); color: #60a5fa; }
.vocab-gender.f { background: rgba(236,72,153,.2); color: #f472b6; }
.vocab-gender.n { background: rgba(16,185,129,.2); color: #34d399; }

/* ── Settings List ─────────────────────────────────────────── */
.settings-group { margin-bottom: 1.5rem; }
.settings-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  margin-bottom: .5rem;
}
.settings-item-info h4 { font-size: .95rem; font-weight: 600; }
.settings-item-info p  { font-size: .8rem; color: var(--text-muted); margin-top: .15rem; }

/* Toggle Switch */
.toggle {
  position: relative;
  width: 44px; height: 24px;
}
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute; inset: 0;
  background: rgba(255,255,255,.15);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background var(--transition);
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 18px; height: 18px;
  background: #fff;
  border-radius: 50%;
  left: 3px; top: 3px;
  transition: transform var(--transition);
}
.toggle input:checked + .toggle-slider { background: var(--accent-gold); }
.toggle input:checked + .toggle-slider::before { transform: translateX(20px); }

/* ── Stats Bar (Progress Screen) ───────────────────────────── */
.stats-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; }
.stat-big-box {
  background: var(--bg-card);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1rem;
  text-align: center;
}
.stat-big-value { font-size: 2rem; font-weight: 900; color: var(--accent-gold); line-height: 1; }
.stat-big-label { font-size: .75rem; color: var(--text-muted); margin-top: .35rem; text-transform: uppercase; letter-spacing: .08em; }

/* ── Misc Utils ────────────────────────────────────────────── */
.mt-1 { margin-top: .35rem; }
.mt-2 { margin-top: .75rem; }
.mt-3 { margin-top: 1.25rem; }
.mt-4 { margin-top: 1.75rem; }
.mb-1 { margin-bottom: .35rem; }
.mb-2 { margin-bottom: .75rem; }
.mb-3 { margin-bottom: 1.25rem; }
.text-center { text-align: center; }
.text-muted   { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-success { color: var(--success); }
.text-danger  { color: var(--danger); }
.text-gold    { color: var(--accent-gold); }
.text-sm { font-size: .85rem; }
.text-xs { font-size: .75rem; }
.fw-700 { font-weight: 700; }
.fw-800 { font-weight: 800; }
.flex   { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-1 { gap: .35rem; }
.gap-2 { gap: .75rem; }
.gap-3 { gap: 1.25rem; }
.w-full { width: 100%; }
.hide   { display: none !important; }
.pointer { cursor: pointer; }

/* ── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,.15); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,.25); }

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 400px) {
  .ai-features-grid { grid-template-columns: 1fr 1fr; }
  .practice-grid    { grid-template-columns: repeat(4,1fr); }
  .stats-grid-2     { grid-template-columns: 1fr 1fr; }
}

/* ── Extra utility classes ─────────────────────────────────── */
.text-purple  { color: var(--accent-purple); }
.text-blue    { color: var(--accent-blue); }
.text-warning { color: var(--warning); }
.fw-900 { font-weight: 900; }

/* ── Practice card wider variant ──────────────────────────── */
.stats-grid-2 .stat-big-box .stat-big-value { font-size: 1.7rem; }

/* ── Leaderboard / rank badges ─────────────────────────────── */
.rank-gold   { color: var(--accent-gold); }
.rank-silver { color: #94a3b8; }
.rank-bronze { color: #b45309; }

/* ── Word-level tooltip for story reader ───────────────────── */
.word-tooltip {
  position: fixed;
  background: #1e2a45;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  padding: .4rem .75rem;
  font-size: .82rem;
  font-weight: 600;
  color: var(--accent-gold);
  z-index: 300;
  pointer-events: none;
  transition: opacity .2s;
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
}

/* ── Pronunciation mic button pulse ────────────────────────── */
@keyframes micPulse {
  0%,100% { box-shadow: 0 0 0 0 rgba(239,68,68,.4); }
  50%      { box-shadow: 0 0 0 12px rgba(239,68,68,0); }
}
.mic-recording { animation: micPulse 1.2s ease-in-out infinite; }

/* ── Flex-center utility ────────────────────────────────────── */
.flex-col  { display: flex; flex-direction: column; }

/* ── Grammar table override ─────────────────────────────────── */
.glass-card table { width: 100%; border-collapse: collapse; font-size: .85rem; margin:.5rem 0; }
.glass-card table th, .glass-card table td {
  border: 1px solid var(--panel-border);
  padding: .4rem .6rem;
  text-align: left;
}
.glass-card table th {
  background: rgba(255,255,255,.06);
  font-weight: 700;
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .06em;
}

/* ── Achieve unlocked pop animation ────────────────────────── */
@keyframes achievePop {
  0%   { transform: scale(0.5); opacity: 0; }
  70%  { transform: scale(1.15); }
  100% { transform: scale(1); opacity: 1; }
}
.achievement-badge.unlocked { animation: achievePop .45s ease; }

/* ── Goal Option Card (Onboarding) ─────────────────────────── */
.goal-option {
  display: block;
  padding: .9rem 1rem;
  background: var(--bg-card);
  border: 1.5px solid var(--panel-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  user-select: none;
}
.goal-option:hover { border-color: rgba(245,158,11,.4); background: rgba(245,158,11,.04); }
.goal-option.active {
  border-color: var(--accent-gold);
  background: rgba(245,158,11,.08);
  box-shadow: 0 0 0 2px rgba(245,158,11,.2);
}

/* ── Test wrong dot (failed question in progress bar) ──────── */
.lesson-step-dot.test-wrong { background: var(--danger); }

/* ── fw-900 already exists, extra safe ─────────────────────── */
.text-right { text-align: right; }

/* ════════════════════════════════════════════════════════════
   APP LAYOUT
   ════════════════════════════════════════════════════════════ */

.app-layout {
  display: flex;
  min-height: 100dvh;
}

.main-column {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* ── Header (mobile-only) ──────────────────────────────────── */
.app-header {
  position: sticky;
  top: 0;
  height: var(--header-height);
  background: var(--bg-sidebar);
  border-bottom: 1px solid var(--panel-border);
  z-index: 100;
}

/* ════════════════════════════════════════════════════════════
   SIDEBAR — MedStudy Style
   ════════════════════════════════════════════════════════════ */

.sidebar {
  display: none;
  width: var(--sidebar-width);
  flex-shrink: 0;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 150;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--panel-border);
  overflow-y: auto;
  overflow-x: hidden;
}

.sidebar-inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 1.25rem .75rem 1rem;
}

/* Brand */
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .5rem .65rem;
  margin-bottom: 1.25rem;
  text-decoration: none;
}
.sidebar-brand-icon {
  width: 32px; height: 32px;
  border-radius: var(--radius-md);
  background: var(--accent-1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .85rem;
  font-weight: 900;
  color: #fff;
  flex-shrink: 0;
}
.sidebar-brand-text { display: flex; flex-direction: column; }
.sidebar-brand-name { font-size: 1rem; font-weight: 700; color: var(--text-primary); }

/* Section Labels */
.sidebar-section-label {
  font-size: .65rem;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--text-muted);
  padding: 1rem .65rem .4rem;
  text-transform: uppercase;
}

/* Nav Links */
.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: .65rem;
  padding: .55rem .65rem;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: .82rem;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition);
}
.sidebar-link i {
  width: 18px;
  text-align: center;
  font-size: .85rem;
}
.sidebar-link:hover {
  background: rgba(255,255,255,.04);
  color: var(--text-secondary);
}

.sidebar-link.active {
  /* overridden below with softer style */
}

.sidebar-badge {
  display: none;
}

/* Sidebar Footer — Theme + User */
.sidebar-footer {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--panel-border);
}

.sidebar-theme-picker {
  display: flex;
  justify-content: space-between;
  padding: .75rem .65rem;
  margin-bottom: .5rem;
  background: rgba(255,255,255,.02);
  border-radius: var(--radius-md);
}

.theme-swatch-mini {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
}

.theme-swatch-mini:hover { transform: scale(1.2); }
.theme-swatch-mini.active { border-color: #fff; box-shadow: 0 0 8px rgba(255,255,255,.3); }

.sidebar-user {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .75rem .65rem;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background var(--transition);
}
.sidebar-user:hover { background: rgba(255,255,255,.04); }

.sidebar-user-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-3));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .8rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 4px 10px rgba(0,0,0,.2);
}
.sidebar-user-info { flex: 1; }
.sidebar-user-name  { font-weight: 600; font-size: .85rem; color: var(--text-primary); line-height: 1.2; }
.sidebar-user-level { font-size: .68rem; color: var(--text-muted); font-weight: 500; }
.sidebar-user-logout { color: var(--text-muted); font-size: .9rem; opacity: .6; transition: all .2s; }
.sidebar-user-logout:hover { color: var(--danger); opacity: 1; }

/* Dashboard Level Progress (Sidebar Bottom) */
.sidebar-progress-box {
  padding: .25rem .65rem .75rem;
}
.sidebar-progress-label { display: flex; justify-content: space-between; font-size: .65rem; font-weight: 700; color: var(--text-muted); margin-bottom: .4rem; }
.sidebar-progress-bar { height: 4px; background: rgba(255,255,255,.06); border-radius: 2px; overflow: hidden; }
.sidebar-progress-fill { height: 100%; background: linear-gradient(90deg, var(--accent-1), var(--accent-3)); transition: width .6s ease; }

/* ── Dashboard Hub Styles ─────────────────────────────────── */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 1200px) {
  .dashboard-grid { grid-template-columns: 2fr 1fr; }
}

.dashboard-banner {
  background: linear-gradient(-45deg, #a78bfa, #fbcfe8, #a855f7, #6ee7b7, #3b82f6);
  background-size: 300% 300%;
  animation: gradientWave 10s ease infinite;
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  color: #fff;
  position: relative;
  overflow: hidden;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 15px 45px -10px rgba(139, 92, 246, 0.55);
  border: 1px solid rgba(255,255,255,0.15);
}

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

.dashboard-banner::before {
  content: '';
  position: absolute;
  top: -20%; left: -10%;
  width: 300px; height: 300px;
  background: rgba(255,255,255,.05);
  border-radius: 50%;
}

.banner-content h1 { font-size: 2rem; font-weight: 900; margin-bottom: .5rem; }
.banner-content p { opacity: .8; font-size: .95rem; }

.banner-stats { display: flex; gap: 2rem; margin-top: 1.5rem; }
.banner-stat-item { text-align: left; }
.banner-stat-value { font-size: 1.75rem; font-weight: 900; display: block; }
.banner-stat-label { font-size: .75rem; text-transform: uppercase; letter-spacing: .05em; opacity: .7; }

.banner-mascot {
  width: 130px;
  height: 130px;
  filter: drop-shadow(0 0 20px rgba(139,92,246,0.3));
  animation: float-slow 4s ease-in-out infinite;
}
@keyframes float-slow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Activity Dots (Streak) */
.activity-dots { display: flex; gap: 8px; justify-content: center; margin-top: 1rem; flex-wrap: wrap; }
.activity-dot {
  width: 50px;
  height: 50px;
  flex: none;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: .8rem;
  color: var(--text-muted);
  transition: all .2s;
}
.activity-dot.active {
  background: var(--accent-1);
  color: #fff;
  box-shadow: 0 4px 10px rgba(124, 92, 252, 0.3);
}
.activity-dot.today { border: 2px solid var(--accent-1); }

/* Compact Sections */
.dashboard-section { margin-bottom: 2rem; }
.dashboard-section-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; }
.dashboard-section-title { font-size: .9rem; font-weight: 800; text-transform: uppercase; letter-spacing: .05em; color: var(--text-muted); }

.glass-card-smooth {
  background: var(--bg-card);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: all var(--transition);
}
.glass-card-smooth:hover {
  transform: translateY(-2px);
  border-color: rgba(139, 92, 246, 0.4);
  box-shadow: var(--shadow-glow-purple);
}

/* ════════════════════════════════════════════════════════════
   WELCOME HERO BANNER
   ════════════════════════════════════════════════════════════ */

.hero-banner {
  background: var(--grad-hero);
  border-radius: var(--radius-lg);
  padding: 1.75rem 2rem;
  margin-bottom: 1.25rem;
  position: relative;
  overflow: hidden;
}
.hero-banner::after {
  content: '';
  position: absolute;
  top: -50%; right: -20%;
  width: 300px; height: 300px;
  background: rgba(255,255,255,.06);
  border-radius: 50%;
  pointer-events: none;
}
.hero-greeting { font-size: 1.5rem; font-weight: 800; color: #fff; }
.hero-date { font-size: .82rem; color: rgba(255,255,255,.65); margin-top: .3rem; }
.hero-stats {
  display: flex;
  gap: 1.5rem;
  margin-top: 1rem;
}
.hero-stat-value { font-size: 1.5rem; font-weight: 800; color: #fff; }
.hero-stat-label { font-size: .72rem; color: rgba(255,255,255,.6); }

/* ════════════════════════════════════════════════════════════
   RESPONSIVE
   ════════════════════════════════════════════════════════════ */

@media (min-width: 768px) {
  .sidebar { display: flex; }
  .main-column { margin-left: var(--sidebar-width); }
  .bottom-nav { display: none !important; }
  .app-header { display: none; }
  body { padding-bottom: 0; }
}

@media (max-width: 767px) {
  .sidebar { display: none !important; }
  .bottom-nav { display: flex; }
  .app-main { padding: 1rem 1rem 1.5rem; }
  .quick-actions-grid { grid-template-columns: repeat(4, 1fr); }
  .ai-features-grid { grid-template-columns: 1fr 1fr; }
  body { padding-bottom: calc(var(--nav-height) + env(safe-area-inset-bottom)); }
}

@media (max-width: 380px) {
  .quick-actions-grid { grid-template-columns: repeat(2, 1fr); }
}


/* ── Premium Motion Graphics ─────────────────────────────────────────── */

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

@keyframes fadeInScale {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes pulse-subtle {
  0% { transform: scale(1); }
  50% { transform: scale(1.02); }
  100% { transform: scale(1); }
}

.animate-fade-in {
  animation: fadeInUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.animate-scale-in {
  animation: fadeInScale 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.stagger-1 { animation-delay: 0.1s; opacity: 0; }
.stagger-2 { animation-delay: 0.2s; opacity: 0; }
.stagger-3 { animation-delay: 0.3s; opacity: 0; }
.stagger-4 { animation-delay: 0.4s; opacity: 0; }
.stagger-5 { animation-delay: 0.5s; opacity: 0; }

.hero-banner {
  background: var(--grad-purple);
  background-size: 200% 200%;
  animation: shimmer 8s infinite alternate;
  box-shadow: 0 15px 40px -10px rgba(139, 92, 246, 0.4);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.1);
}

.glass-card {
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease;
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 15px 35px -5px rgba(0, 0, 0, 0.4), 0 0 15px 0 rgba(99, 102, 241, 0.1);
}

/* Animations and micro-interactions handled above */

.nav-item i, .sidebar-link i {
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-item:hover i, .sidebar-link:hover i {
  transform: scale(1.2) rotate(-5deg);
}

.vocab-item {
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.vocab-item:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--accent-blue) !important;
  padding-left: 1rem;
}

#app-root {
  animation: fadeInScale .35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ── Theme Selection Cards ──────────────────────────────────── */
.theme-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  padding: 1rem 0.5rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  background: rgba(255, 255, 255, 0.02);
}

.theme-card:hover {
  background: rgba(255, 255, 255, 0.05);
  transform: translateY(-3px);
}

.theme-card.active {
  background: rgba(124, 92, 252, 0.1);
  border-color: var(--accent-1);
  box-shadow: 0 0 15px rgba(124, 92, 252, 0.2);
}

.theme-swatch {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  border: 1px solid var(--panel-border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition);
}

.theme-card:hover .theme-swatch {
  transform: scale(1.1);
}

.swatch-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  box-shadow: 0 0 5px rgba(0,0,0,0.2);
}

.theme-card-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-secondary);
}

.theme-card.active .theme-card-label {
  color: var(--accent-1);
}

/* ── Gender Tags (Article colors) ──────────────────────────────────── */
.gender-tag {
  display: inline-block;
  padding: .2rem .65rem;
  border-radius: var(--radius-full);
  font-size: .75rem;
  font-weight: 800;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.gender-tag.m, .gender-tag.der { background: rgba(59,130,246,.18); color: #60a5fa; border: 1px solid rgba(59,130,246,.3); }
.gender-tag.f, .gender-tag.die { background: rgba(236,72,153,.18); color: #f472b6; border: 1px solid rgba(236,72,153,.3); }
.gender-tag.n, .gender-tag.das { background: rgba(16,185,129,.18); color: #34d399; border: 1px solid rgba(16,185,129,.3); }

/* ── Quick Actions Grid ─────────────────────────────────────────────── */
.quick-actions-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .6rem;
}
.quick-action-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .35rem;
  padding: .9rem .5rem;
  background: var(--bg-card);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  font-size: .72rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-align: center;
  text-decoration: none;
}
.quick-action-btn:hover {
  border-color: rgba(255,255,255,.18);
  color: var(--text-primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}
.quick-action-btn .qa-icon {
  width: 38px; height: 38px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
}

/* ── AI Hub Feature List ─────────────────────────────────────────────── */
.ai-hub-list {
  display: flex;
  flex-direction: column;
  gap: .65rem;
}
.ai-hub-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  color: inherit;
}
.ai-hub-item:hover {
  border-color: rgba(139,92,246,.4);
  transform: translateX(4px);
  box-shadow: var(--shadow-glow-purple);
}
.ai-hub-item-icon {
  width: 52px; height: 52px;
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}
.ai-hub-item-info { flex: 1; }
.ai-hub-item-title { font-weight: 700; font-size: .95rem; margin-bottom: .2rem; }
.ai-hub-item-sub { font-size: .8rem; color: var(--text-muted); }

/* ── Nav item active indicator ──────────────────────────────────────── */
.nav-item.active::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--accent-gold);
  border-radius: 0 0 4px 4px;
}
.nav-item { position: relative; }

/* ── Sidebar active link highlight ──────────────────────────────────── */
.sidebar-link.active {
  background: linear-gradient(135deg, rgba(139,92,246,.2), rgba(99,102,241,.15));
  border: 1px solid rgba(139,92,246,.35);
  color: #c4b5fd;
  font-weight: 700;
}
.sidebar-link.active i { color: var(--accent-1); }

/* ── Focus-visible accessibility ────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--accent-1);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}
:focus:not(:focus-visible) { outline: none; }

/* ── Smooth page entry ──────────────────────────────────────────────── */
body {
  animation: appFadeIn .35s ease-out forwards;
}
@keyframes appFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ── Prefers-reduced-motion: honour the OS setting ──────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
  .blob { display: none; }
  .flashcard { transition: none; }
  .xp-bar-fill { transition: none; }
  body { animation: none; opacity: 1; }
}