/* =========================================================================
   LeapLern Design System — Modern Minimalist Redesign
   ========================================================================= */

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

/* --- Design Tokens ---------------------------------------------------- */

:root {
  color-scheme: light;

  /* Primary palette */
  --primary: #66ccff;
  --primary-hover: #4cbcf3;
  --primary-text: #111111;
  --highlight: #aeebff;
  --bright-highlight: #e6f7ff;

  /* Surfaces */
  --bg: #F7F8FC;
  --card-bg: #ffffff;
  --card-border: #ECEEF5;
  --input-bg: #ffffff;
  --input-border: #ECEEF5;
  --btn-bg: #ffffff;
  --btn-border: #ECEEF5;

  /* Text */
  --text: #111111;
  --muted: #8A90A2;

  /* Feedback */
  --result-bg: #f3f4f6;
  --result-border: #ECEEF5;
  --answer-box-bg: #ffffff;
  --answer-box-border: #ECEEF5;
  --match-bg: #dcfce7;
  --match-border: #4ADE80;
  --match-text: #14532d;
  --corr-ok: #111111;
  --corr-fix: #FB7185;
  --error: #FB7185;
  --success: #059669;

  /* Spacing */
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 32px;
  --space-xl: 40px;

  /* Radius */
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 24px;
  --radius-xl: 28px;

  /* Shadows */
  --shadow-card: 0 2px 16px rgba(0, 0, 0, 0.06);
  --shadow-elevated: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-focus: 0 0 0 3px rgba(102, 204, 255, 0.3);
}

[data-theme='dark'] {
  color-scheme: dark;

  --bg: #1a1d23;
  --card-bg: #22262e;
  --card-border: #2e3340;
  --input-bg: #22262e;
  --input-border: #2e3340;
  --btn-bg: #22262e;
  --btn-border: #2e3340;

  --text: #f0f2f5;
  --muted: #8a90a2;
  --primary: #66ccff;
  --primary-hover: #8edfff;
  --primary-text: #ffffff;
  --highlight: #aeebff;
  --bright-highlight: #e6f7ff;

  --result-bg: #272b33;
  --result-border: #2e3340;
  --answer-box-bg: #272b33;
  --answer-box-border: #2e3340;
  --match-bg: #14532d;
  --match-border: #22c55e;
  --match-text: #dcfce7;
  --corr-ok: #e7e9ea;
  --corr-fix: #f87171;
  --error: #f87171;
  --success: #34d399;

  --shadow-card: 0 2px 16px rgba(0, 0, 0, 0.2);
  --shadow-elevated: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-focus: 0 0 0 3px rgba(102, 204, 255, 0.25);
}

/* --- Reset & Base ----------------------------------------------------- */

*, *::before, *::after { box-sizing: border-box; }

html, body {
  min-height: 100%;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.2s ease, color 0.2s ease;
}

h1, h2, h3 {
  margin: 0 0 var(--space-xs) 0;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.25rem; }

p { margin: 0 0 var(--space-xs) 0; }

/* --- Layout ----------------------------------------------------------- */

.container {
  position: relative;
  max-width: 680px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-sm);
}

/* --- Header Bar ------------------------------------------------------- */

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.page-header-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  transition: color 0.18s ease, background 0.18s ease;
}

.page-header-back:hover {
  color: var(--text);
  background: color-mix(in srgb, var(--primary) 8%, transparent);
}

.page-header-back svg { width: 16px; height: 16px; }

.page-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

/* --- Theme Toggle ----------------------------------------------------- */

.theme-bar {
  display: flex;
  justify-content: flex-end;
  margin-bottom: var(--space-xs);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--muted);
  cursor: pointer;
  transition: border-color 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
}

.theme-toggle:hover {
  border-color: var(--primary);
  color: var(--text);
}

/* --- Cards ------------------------------------------------------------ */

.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  margin-top: var(--space-sm);
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.card-interactive:hover {
  box-shadow: var(--shadow-elevated);
  transform: translateY(-2px);
}

/* --- Quiz Card -------------------------------------------------------- */

.quiz-card {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  padding: var(--space-lg) var(--space-md);
  margin-top: var(--space-sm);
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.card-badge {
  position: absolute;
  top: var(--space-sm);
  left: var(--space-md);
  margin: 0;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  text-align: left;
}

/* --- Typography ------------------------------------------------------- */

.page-title {
  font-size: 1.75rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-xs);
}

.page-intro {
  text-align: center;
  color: var(--muted);
  font-size: 15px;
  margin-bottom: var(--space-md);
}

label {
  display: block;
  margin-top: var(--space-sm);
  margin-bottom: 6px;
  color: var(--text);
  font-weight: 600;
  font-size: 14px;
}

/* --- Form Elements ---------------------------------------------------- */

input, select, textarea {
  font-family: inherit;
  padding: 14px var(--space-sm);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-md);
  min-width: 200px;
  font-size: 16px;
  background: var(--input-bg);
  color: var(--text);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: var(--shadow-focus);
}

input::placeholder, textarea::placeholder {
  color: var(--muted);
  opacity: 0.7;
}

#answerInput {
  flex: 1 1 auto;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  box-sizing: border-box;
  padding: 16px var(--space-sm);
  font-size: 17px;
  border-radius: var(--radius-md);
}

@media (min-width: 640px) {
  #answerInput:not(.sentence-inline-input) {
    max-width: min(100%, 520px);
  }
}

/* --- Buttons ---------------------------------------------------------- */

button {
  font-family: inherit;
  padding: 12px 20px;
  border: 1px solid var(--btn-border);
  border-radius: var(--radius-md);
  background: var(--btn-bg);
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.18s ease;
}

button:hover:not(:disabled) {
  border-color: var(--primary);
}

button:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

button.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--primary-text);
  font-weight: 600;
  padding: 16px 28px;
  font-size: 16px;
  box-shadow: 0 2px 8px rgba(102, 204, 255, 0.25);
}

button.primary:hover:not(:disabled) {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  box-shadow: 0 4px 16px rgba(102, 204, 255, 0.35);
  transform: translateY(-1px);
}

button.primary:active:not(:disabled) {
  transform: translateY(0);
}

/* --- Layout Helpers --------------------------------------------------- */

.row {
  margin-top: var(--space-sm);
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  align-items: center;
}

/* --- Status Messages -------------------------------------------------- */

.error {
  color: var(--error);
  margin-top: var(--space-sm);
  font-weight: 600;
  font-size: 14px;
  padding: var(--space-sm);
  background: color-mix(in srgb, var(--error) 8%, var(--card-bg));
  border-radius: var(--radius-sm);
  border: 1px solid color-mix(in srgb, var(--error) 20%, var(--card-border));
}

.success {
  color: var(--success);
  margin-top: var(--space-sm);
  font-weight: 600;
  font-size: 14px;
  padding: var(--space-sm);
  background: color-mix(in srgb, var(--success) 8%, var(--card-bg));
  border-radius: var(--radius-sm);
  border: 1px solid color-mix(in srgb, var(--success) 20%, var(--card-border));
}

/* --- Quiz Vocabulary Block -------------------------------------------- */

.quiz-vocab-block,
.sentence-quiz {
  max-width: min(100%, 520px);
  margin-left: auto;
  margin-right: auto;
  box-sizing: border-box;
}

.quiz-answer-row {
  justify-content: flex-start;
  align-items: stretch;
  width: 100%;
  box-sizing: border-box;
  padding: 0;
  margin-left: 0;
  margin-right: 0;
}

.quiz-actions-row,
.quiz-card .result {
  max-width: min(100%, 520px);
  margin-left: auto;
  margin-right: auto;
  box-sizing: border-box;
}

.prompt {
  font-size: 1.5rem;
  font-weight: 700;
  margin: var(--space-lg) 0 var(--space-sm);
  text-align: center;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

/* --- Result / Feedback ------------------------------------------------ */

.result {
  margin-top: var(--space-sm);
  background: var(--result-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  border: 1px solid var(--result-border);
  color: var(--text);
}

.result-meta {
  margin-bottom: var(--space-xs);
  font-weight: 600;
  font-size: 14px;
  line-height: 1.5;
}

.result-row + .result-row {
  margin-top: var(--space-xs);
}

.result-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin-bottom: 6px;
}

.answer-user,
.answer-corrected,
.answer-match {
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  background: var(--answer-box-bg);
  border: 1px solid var(--answer-box-border);
  word-break: break-word;
  font-size: 16px;
}

.answer-match {
  background: var(--match-bg);
  border-color: var(--match-border);
  color: var(--match-text);
  font-weight: 600;
}

.corr-ok { color: var(--corr-ok); }
.corr-fix { color: var(--corr-fix); font-weight: 700; }

/* --- Warning / Rhetorical --------------------------------------------- */

.warning-flow {
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  border: 1px solid var(--primary);
  background: color-mix(in srgb, var(--primary) 10%, var(--card-bg));
  font-weight: 600;
  font-size: 14px;
}

/* --- Load / Quota Banners --------------------------------------------- */

.load-warning-banner {
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  border: 1px solid var(--result-border);
  background: var(--result-bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.45;
  margin-bottom: var(--space-xs);
}

.load-warning-banner.load-warning-quota {
  border-color: var(--error);
}

.quota-banner-stack {
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-sm);
}

.quota-banner {
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  border: 1px solid var(--card-border);
  font-size: 14px;
  line-height: 1.45;
}

.quota-banner--plan {
  background: var(--result-bg);
  color: var(--muted);
  border-style: dashed;
}

.quota-banner--soft_new,
.quota-banner--soft_review {
  background: color-mix(in srgb, var(--primary) 10%, var(--card-bg));
  border-color: color-mix(in srgb, var(--primary) 30%, var(--card-border));
  color: var(--text);
}

.quota-banner--hard_new,
.quota-banner--hard_review {
  background: color-mix(in srgb, #d97706 12%, var(--card-bg));
  border-color: color-mix(in srgb, #d97706 40%, var(--card-border));
  color: var(--text);
}

.quota-banner--fully_blocked {
  background: color-mix(in srgb, var(--error) 10%, var(--card-bg));
  border-color: var(--error);
  color: var(--text);
  font-weight: 500;
}

[data-theme='dark'] .quota-banner--soft_new,
[data-theme='dark'] .quota-banner--soft_review {
  background: color-mix(in srgb, var(--primary) 15%, var(--card-bg));
}

[data-theme='dark'] .quota-banner--hard_new,
[data-theme='dark'] .quota-banner--hard_review {
  background: color-mix(in srgb, #f59e0b 10%, var(--card-bg));
}

/* --- Sentence Mode ---------------------------------------------------- */

.sentence-quiz {
  margin: var(--space-sm) 0 var(--space-md);
}

.sentence-de-line {
  font-size: 18px;
  margin: 6px 0 var(--space-sm);
}

.de-lexeme-hint {
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 2px;
  text-decoration-color: var(--primary);
  font-weight: 600;
}

.sentence-target-inline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  font-size: 18px;
  margin: 6px 0 var(--space-sm);
  line-height: 1.6;
}

.inline-input-slot {
  display: inline-flex;
  align-items: center;
  vertical-align: middle;
}

.sentence-inline-input {
  min-width: 5.5rem !important;
  max-width: 11rem !important;
  width: auto !important;
  flex: 0 1 auto !important;
  border-radius: 999px !important;
  border-width: 2px !important;
  border-color: var(--primary) !important;
  padding: 10px 16px !important;
  text-align: center;
  font-size: 17px !important;
}

.sentence-block-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
  color: var(--muted);
  margin-top: var(--space-xs);
}

.sentence-line {
  font-weight: 500;
  line-height: 1.5;
}

.gap-placeholder {
  display: inline-block;
  min-width: 4.5rem;
  padding: 0 6px;
  margin: 0 2px;
  border-bottom: 2px dashed var(--primary);
  color: transparent;
  vertical-align: baseline;
  user-select: none;
}

.gap-input-ring {
  border-radius: 999px !important;
  border-width: 2px !important;
  border-color: var(--primary) !important;
  padding: 14px 22px !important;
  text-align: center;
  font-size: 18px !important;
}

.inline-input-placeholder {
  display: inline-block;
  min-width: 4ch;
  letter-spacing: 1px;
  color: var(--muted);
  border-bottom: 2px dashed var(--primary);
}

/* --- Multiple Choice -------------------------------------------------- */

.mc-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
  margin-top: var(--space-md);
  max-width: min(100%, 520px);
  margin-left: auto;
  margin-right: auto;
}

.mc-choice {
  padding: 18px var(--space-sm);
  font-family: inherit;
  font-size: 16px;
  font-weight: 500;
  border: 2px solid var(--card-border);
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  color: var(--text);
  cursor: pointer;
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: all 0.18s ease;
}

.mc-choice:hover:not(:disabled) {
  border-color: var(--primary);
  box-shadow: var(--shadow-elevated);
  transform: translateY(-2px) scale(1.01);
}

.mc-choice:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.mc-choice:disabled { cursor: default; }

.mc-choice.is-correct {
  border-color: #4ADE80;
  background: color-mix(in srgb, #4ADE80 15%, var(--card-bg));
  color: var(--text);
  box-shadow: 0 0 16px rgba(74, 222, 128, 0.2);
  animation: mc-correct-pop 0.3s ease;
}

.mc-choice.is-wrong {
  border-color: var(--error);
  background: color-mix(in srgb, var(--error) 10%, var(--card-bg));
  color: var(--text);
  animation: mc-wrong-shake 0.4s ease;
}

@keyframes mc-correct-pop {
  0% { transform: scale(1); }
  50% { transform: scale(1.04); }
  100% { transform: scale(1); }
}

@keyframes mc-wrong-shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

.quiz-card.mc-correct {
  border-color: #4ADE80;
  box-shadow: 0 0 20px rgba(74, 222, 128, 0.15);
}

.quiz-card.mc-wrong {
  border-color: var(--error);
}

.mc-iknow-row {
  margin-top: var(--space-sm);
  text-align: center;
  max-width: min(100%, 520px);
  margin-left: auto;
  margin-right: auto;
}

#iknowBtn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px var(--space-md);
  border: 2px solid var(--card-border);
  border-radius: var(--radius-md);
  background: var(--card-bg);
  color: var(--muted);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.18s ease;
}

#iknowBtn:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--text);
  background: color-mix(in srgb, var(--primary) 6%, var(--card-bg));
}

#iknowBtn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* --- Lesson Pause Panel ----------------------------------------------- */

.pause-panel {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  padding: var(--space-lg) var(--space-md);
  margin-top: var(--space-sm);
  max-width: min(100%, 560px);
  margin-left: auto;
  margin-right: auto;
  box-shadow: var(--shadow-card);
}

.pause-title {
  margin: 0 0 var(--space-xs);
  font-size: 1.35rem;
  font-weight: 700;
  text-align: center;
}

.pause-subtitle {
  margin: 0 0 var(--space-md);
  line-height: 1.55;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

.lesson-meter-wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.lesson-meter {
  flex: 1 1 200px;
  height: 8px;
  border-radius: 999px;
  background: var(--result-bg);
  overflow: hidden;
  min-width: 160px;
}

.lesson-meter-fill {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary), #4ADE80);
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.lesson-meter-caption {
  flex: 1 1 140px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.4;
}

.pause-warnings {
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  border: 1px solid var(--result-border);
  background: var(--result-bg);
  font-size: 13px;
  line-height: 1.5;
  margin-bottom: var(--space-md);
  color: var(--muted);
}

.pause-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
  align-items: stretch;
}

.choice-btn {
  flex: 1 1 200px;
  min-height: 52px;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  border: none;
  font-family: inherit;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.2s ease;
}

.choice-fertig,
.choice-weiter {
  color: #fff;
}

.choice-btn:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.choice-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-elevated);
}

.choice-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

/* --- Lesson Break Panel (legacy) -------------------------------------- */

.lesson-break-panel {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  margin-top: var(--space-sm);
  max-width: min(100%, 520px);
  margin-left: auto;
  margin-right: auto;
  box-shadow: var(--shadow-card);
}

.lesson-break-text {
  margin: 0 0 var(--space-sm);
  line-height: 1.55;
  font-size: 15px;
}

.lesson-break-warn {
  color: var(--muted);
  font-size: 14px;
}

/* --- Perfect Glow ----------------------------------------------------- */

.quiz-card.perfect-glow {
  border-color: #4ADE80;
  box-shadow: 0 0 24px rgba(74, 222, 128, 0.25), var(--shadow-card);
  animation: perfect-pulse 0.6s ease;
}

@keyframes perfect-pulse {
  0% { box-shadow: 0 0 0 rgba(74, 222, 128, 0); }
  50% { box-shadow: 0 0 32px rgba(74, 222, 128, 0.35); }
  100% { box-shadow: 0 0 24px rgba(74, 222, 128, 0.25), var(--shadow-card); }
}

/* --- Mastery Overlay -------------------------------------------------- */

.mastery-overlay {
  position: fixed;
  inset: 0;
  z-index: 10020;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: var(--space-sm);
}

.mastery-dialog {
  width: min(100%, 420px);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  padding: var(--space-lg) var(--space-md) var(--space-md);
  text-align: center;
  box-shadow: var(--shadow-elevated);
  animation: mastery-enter 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes mastery-enter {
  0% { opacity: 0; transform: scale(0.8) translateY(20px); }
  100% { opacity: 1; transform: scale(1) translateY(0); }
}

.mastery-dialog h2 {
  margin: 4px 0 var(--space-xs) 0;
  font-size: 1.5rem;
}

.mastery-dialog p {
  margin: 0 0 var(--space-md) 0;
  color: var(--muted);
  font-size: 14px;
}

/* Confetti / Fireworks */
.mastery-fireworks {
  position: relative;
  height: 80px;
  margin-bottom: var(--space-xs);
  overflow: hidden;
}

.mastery-fireworks .fw {
  position: absolute;
  top: 40px;
  left: 50%;
  width: 8px;
  height: 8px;
  margin-left: -4px;
  border-radius: 50%;
  opacity: 0;
  transform: scale(0.3);
  animation: fw-burst 1s ease-out forwards;
}

.mastery-fireworks .fw-1 { background: #f59e0b; animation-delay: 0ms; --tx: -65px; --ty: -50px; }
.mastery-fireworks .fw-2 { background: #4ADE80; animation-delay: 100ms; --tx: -30px; --ty: -60px; }
.mastery-fireworks .fw-3 { background: #66ccff; animation-delay: 180ms; --tx: 0px; --ty: -68px; }
.mastery-fireworks .fw-4 { background: #FB7185; animation-delay: 260ms; --tx: 30px; --ty: -60px; }
.mastery-fireworks .fw-5 { background: #a855f7; animation-delay: 340ms; --tx: 65px; --ty: -50px; }

@keyframes fw-burst {
  0% { opacity: 0; transform: translate(0, 0) scale(0.3); }
  15% { opacity: 1; }
  100% { opacity: 0; transform: translate(var(--tx, 0px), var(--ty, -50px)) scale(2); }
}

/* --- Quiz Boot Overlay ------------------------------------------------ */

.quiz-boot-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--muted);
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* === WELCOME PAGE (index.html) ======================================== */

.welcome-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(circle at 50% 20%, color-mix(in srgb, var(--primary) 14%, transparent), transparent 55%),
    var(--bg);
}

.welcome-page .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 440px;
  padding-top: var(--space-lg);
  padding-bottom: var(--space-lg);
}

/* --- Logo ------------------------------------------------------------ */

.logo-box {
  width: min(220px, 56vw);
  height: min(220px, 56vw);
  border-radius: var(--radius-xl);
  border: 2.5px solid var(--primary);
  overflow: hidden;
  display: grid;
  place-items: center;
  background: var(--card-bg);
  box-shadow: var(--shadow-card);
  margin-bottom: var(--space-md);
}

.logo-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.logo-dark { display: none; }
[data-theme='dark'] .logo-dark { display: block; }
[data-theme='dark'] .logo-light { display: none; }

/* --- Welcome title --------------------------------------------------- */

.welcome-title-prefix {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--muted);
  margin-bottom: 2px;
}

.welcome-title {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
  letter-spacing: -0.02em;
}

.welcome-tagline {
  color: var(--muted);
  font-size: 15px;
  margin-bottom: var(--space-lg);
}

/* --- CTA ------------------------------------------------------------- */

.welcome-cta {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 18px 32px;
  font-size: 17px;
  font-weight: 700;
  border-radius: var(--radius-lg);
  background: var(--primary);
  border: none;
  color: var(--primary-text);
  cursor: pointer;
  text-decoration: none;
  font-family: inherit;
  box-shadow: 0 4px 16px rgba(102, 204, 255, 0.3);
  transition: all 0.2s ease;
}

.welcome-cta:hover {
  background: var(--primary-hover);
  box-shadow: 0 6px 24px rgba(102, 204, 255, 0.4);
  transform: translateY(-2px);
}

.welcome-cta svg {
  width: 20px;
  height: 20px;
}

.welcome-secondary {
  margin-top: var(--space-sm);
  font-size: 14px;
  color: var(--muted);
}

[data-theme='dark'] .welcome-secondary {
  color: rgba(255, 255, 255, 0.5);
}

.welcome-secondary button {
  background: none;
  border: none;
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
  padding: 2px 4px;
  font-family: inherit;
  transition: color 0.18s ease;
}

.welcome-secondary button:hover {
  color: var(--primary-hover);
}

.welcome-section {
  width: 100%;
  margin-top: var(--space-md);
  animation: welcome-section-in 0.3s ease;
}

@keyframes welcome-section-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.welcome-section .card {
  text-align: center;
}

.welcome-section input,
.welcome-section select {
  width: 100%;
  min-width: 0;
  max-width: 100%;
  box-sizing: border-box;
}

.welcome-section .row {
  justify-content: center;
}

/* --- Auth page (signup.html) ----------------------------------------- */

.auth-page .container {
  max-width: 440px;
}

.auth-page .card {
  text-align: center;
  margin-top: var(--space-md);
}

.auth-page .card input,
.auth-page .card select {
  width: 100%;
  min-width: 0;
  max-width: 100%;
  box-sizing: border-box;
}

.auth-page .card .row {
  justify-content: center;
}

/* --- Hero card skeleton / fade-in ------------------------------------ */

.hero-goal-card.hero-loading {
  animation: hero-pulse 1.5s ease-in-out infinite;
}

.hero-goal-card.hero-loading .hero-goal-value,
.hero-goal-card.hero-loading .hero-goal-label {
  opacity: 0.5;
}

@keyframes hero-pulse {
  0%, 100% { opacity: 0.65; }
  50% { opacity: 0.9; }
}

.hero-goal-card.hero-loaded .hero-goal-value,
.hero-goal-card.hero-loaded .hero-goal-label,
.hero-goal-card.hero-loaded .hero-progress-bar {
  animation: hero-data-in 0.4s ease forwards;
}

@keyframes hero-data-in {
  from { opacity: 0.5; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* === DASHBOARD PAGE (projekt.html) ==================================== */

.dashboard-page {
  min-height: 100vh;
  background:
    radial-gradient(circle at 15% 18%, color-mix(in srgb, var(--primary) 12%, transparent), transparent 48%),
    radial-gradient(circle at 85% 8%, color-mix(in srgb, var(--highlight) 10%, transparent), transparent 42%),
    var(--bg);
}

.greeting-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.greeting-header h1 {
  font-size: 1.75rem;
  margin: 0;
}

.hero-goal-card {
  background: linear-gradient(135deg, #4a9bd9 0%, var(--primary) 50%, #8edfff 100%);
  border-radius: var(--radius-xl);
  padding: var(--space-md) var(--space-md) var(--space-sm);
  color: #fff;
  box-shadow: 0 4px 24px rgba(102, 204, 255, 0.25);
  margin-bottom: var(--space-md);
  position: relative;
  overflow: hidden;
}

[data-theme='dark'] .hero-goal-card {
  background: linear-gradient(135deg, #2a6090 0%, #3a8abf 50%, #4a9bd9 100%);
}

.hero-goal-label {
  font-size: 14px;
  font-weight: 600;
  opacity: 0.9;
  margin-bottom: 4px;
}

.hero-goal-value {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.hero-progress-bar {
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.3);
  overflow: hidden;
}

.hero-progress-fill {
  height: 100%;
  border-radius: 999px;
  background: #fff;
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.hero-goal-icon {
  position: absolute;
  right: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  width: 64px;
  height: 64px;
  opacity: 0.2;
}

/* --- Section Headings ------------------------------------------------ */

.section-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-sm);
  margin-top: var(--space-md);
}

.section-label h2 {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0;
}

.section-label a {
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
}

/* --- Session Cards --------------------------------------------------- */

.session-card-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.session-card {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-sm) var(--space-md);
  box-shadow: var(--shadow-card);
  cursor: pointer;
  text-decoration: none;
  color: var(--text);
  transition: box-shadow 0.2s ease, transform 0.2s ease, border-color 0.18s ease;
}

.session-card:hover {
  box-shadow: var(--shadow-elevated);
  transform: translateY(-2px);
  border-color: var(--primary);
}

.session-avatar {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
}

.session-card-body {
  flex: 1;
  min-width: 0;
}

.session-card-title {
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.session-card-sub {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 6px;
}

.session-progress-bar {
  height: 6px;
  border-radius: 999px;
  background: var(--result-bg);
  overflow: hidden;
}

.session-progress-fill {
  height: 100%;
  border-radius: 999px;
  background: var(--primary);
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.session-card-pct {
  flex-shrink: 0;
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  min-width: 40px;
  text-align: right;
}

.session-card-arrow {
  flex-shrink: 0;
  color: var(--muted);
  margin-left: 4px;
}

/* --- Create Course Card ---------------------------------------------- */

.create-course-card {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  background: var(--card-bg);
  border: 2px dashed var(--card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  cursor: pointer;
  color: var(--muted);
  font-size: 15px;
  font-weight: 600;
  transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease;
}

.create-course-card:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: color-mix(in srgb, var(--primary) 5%, var(--card-bg));
}

.create-course-card .plus-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--primary) 12%, var(--card-bg));
  display: grid;
  place-items: center;
  color: var(--primary);
  font-size: 22px;
  font-weight: 700;
}

/* --- Wizard (collapsible) -------------------------------------------- */

.wizard-panel {
  margin-top: var(--space-sm);
  animation: welcome-section-in 0.3s ease;
}

/* --- Streak Row ------------------------------------------------------ */

.streak-section {
  margin-top: var(--space-md);
  margin-bottom: var(--space-md);
}

.streak-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.streak-sub {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: var(--space-sm);
}

.streak-row {
  display: flex;
  justify-content: space-between;
  gap: 6px;
}

.streak-day {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.streak-dot {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  border: 2px solid var(--card-border);
  background: var(--card-bg);
  transition: all 0.2s ease;
}

.streak-dot--active {
  border-color: var(--primary);
  background: color-mix(in srgb, var(--primary) 15%, var(--card-bg));
  color: var(--primary);
}

.streak-dot svg {
  width: 14px;
  height: 14px;
}

.streak-label {
  font-size: 11px;
  color: var(--muted);
  font-weight: 500;
}

/* === STATS PAGE ====================================================== */

.stats-page {
  min-height: 100vh;
  background:
    radial-gradient(circle at 50% 5%, color-mix(in srgb, var(--primary) 10%, transparent), transparent 50%),
    var(--bg);
}

.stats-hero {
  background: linear-gradient(135deg, #4a9bd9 0%, var(--primary) 50%, #8edfff 100%);
  border-radius: var(--radius-xl);
  padding: var(--space-md);
  color: #fff;
  box-shadow: 0 4px 24px rgba(102, 204, 255, 0.25);
  margin-bottom: var(--space-md);
  display: flex;
  gap: var(--space-md);
  align-items: stretch;
}

[data-theme='dark'] .stats-hero {
  background: linear-gradient(135deg, #2a6090 0%, #3a8abf 50%, #4a9bd9 100%);
}

.stats-hero-block {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-sm);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.12);
}

.stats-hero-value {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 4px;
}

.stats-hero-label {
  font-size: 12px;
  font-weight: 500;
  opacity: 0.85;
}

.stats-course-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.stats-course-row {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
}

.stats-course-row .session-avatar {
  width: 36px;
  height: 36px;
  font-size: 15px;
  border-radius: 10px;
}

.stats-course-info {
  flex: 1;
  min-width: 0;
}

.stats-course-name {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
}

.stats-course-bar {
  height: 6px;
  border-radius: 999px;
  background: var(--result-bg);
  overflow: hidden;
}

.stats-course-fill {
  height: 100%;
  border-radius: 999px;
  background: var(--primary);
  transition: width 0.5s ease;
}

.stats-course-pct {
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  min-width: 40px;
  text-align: right;
}

/* --- Achievements ---------------------------------------------------- */

.achievement-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
}

.achievement-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-sm);
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-card);
}

.achievement-badge.locked {
  opacity: 0.45;
  filter: grayscale(0.6);
}

.achievement-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  margin-bottom: var(--space-xs);
  font-size: 22px;
}

.achievement-name {
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 2px;
}

.achievement-desc {
  font-size: 11px;
  color: var(--muted);
  line-height: 1.3;
}

/* (projekt.html uses .dashboard-page — see Dashboard section above) */

/* --- Plan / Fieldset -------------------------------------------------- */

.plan-length-fieldset {
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-sm) var(--space-md) var(--space-md);
  margin-top: var(--space-sm);
}

.plan-length-fieldset legend {
  padding: 0 var(--space-xs);
  font-weight: 600;
  font-size: 14px;
}

.radio-row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin: var(--space-sm) 0;
  font-weight: 500;
  cursor: pointer;
}

.radio-row input {
  margin-top: 3px;
  min-width: auto;
}

.plan-hint {
  margin: 4px 0 var(--space-sm) 28px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
}

.checkbox-row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-xs);
  font-weight: 500;
  margin-top: var(--space-sm);
}

.checkbox-row input {
  margin-top: 4px;
  min-width: auto;
}

/* --- Link Button ------------------------------------------------------ */

.link-button {
  background: none;
  border: none;
  color: var(--muted);
  text-decoration: underline;
  text-underline-offset: 2px;
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
  padding: 4px var(--space-xs);
  transition: color 0.18s ease;
}

.link-button:hover:not(:disabled) { color: var(--text); }
.link-button:disabled { opacity: 0.5; cursor: not-allowed; }

/* --- Coming Soon Page ------------------------------------------------- */

.coming-soon-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.coming-soon-card {
  text-align: center;
  padding: var(--space-xl) var(--space-md);
  margin-top: var(--space-xl);
}

.coming-soon-card h2 {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
}

.coming-soon-card p {
  color: var(--muted);
  font-size: 15px;
}

.coming-soon-icon {
  font-size: 3rem;
  margin-bottom: var(--space-sm);
  opacity: 0.5;
}

/* === RESPONSIVE ======================================================= */

@media (max-width: 760px) {
  .logo-box {
    width: min(180px, 50vw);
    height: min(180px, 50vw);
  }

  .welcome-title { font-size: 1.75rem; }

  .page-header {
    flex-wrap: wrap;
    gap: var(--space-xs);
  }

  .page-header-actions { gap: 4px; }

  .page-header-back {
    font-size: 13px;
    padding: 6px var(--space-xs);
  }

  .stats-hero {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .achievement-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xs);
  }
}

@media (max-width: 480px) {
  .mc-block { grid-template-columns: 1fr; }

  .container { padding: var(--space-sm) 12px; }

  h1, .page-title { font-size: 1.35rem; }

  .prompt {
    font-size: 1.2rem;
    margin-top: var(--space-md);
  }

  .card {
    padding: var(--space-sm);
    border-radius: var(--radius-lg);
  }

  .quiz-card {
    padding: var(--space-md) var(--space-sm);
    border-radius: var(--radius-lg);
  }

  .mc-choice {
    padding: 14px var(--space-sm);
    border-radius: var(--radius-lg);
  }

  .choice-btn { flex: 1 1 100%; }

  .pause-panel {
    padding: var(--space-md) var(--space-sm);
    border-radius: var(--radius-lg);
  }

  .mastery-dialog {
    padding: var(--space-md) var(--space-sm) var(--space-sm);
    border-radius: var(--radius-lg);
  }

  button.primary {
    padding: 14px var(--space-md);
    font-size: 15px;
  }

  input, select, textarea {
    min-width: 0;
    width: 100%;
  }

  .result {
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
  }

  .coming-soon-card {
    padding: var(--space-lg) var(--space-sm);
    margin-top: var(--space-lg);
  }

  .welcome-title { font-size: 1.5rem; }
  .welcome-cta { padding: 16px 24px; font-size: 16px; }

  .greeting-header h1 { font-size: 1.4rem; }

  .hero-goal-card { padding: var(--space-sm); }

  .session-card { padding: var(--space-sm); }
  .session-avatar { width: 38px; height: 38px; font-size: 16px; }

  .streak-dot { width: 28px; height: 28px; }

  .stats-hero-value { font-size: 1.7rem; }

  .achievement-grid { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .achievement-badge { padding: var(--space-xs); }
  .achievement-icon { width: 40px; height: 40px; font-size: 18px; }
}