:root {
  --bg: #0f172a;
  /* slate-900 */
  --card: #111827;
  /* gray-900 */
  --muted: #94a3b8;
  /* slate-400 */
  --text: #e5e7eb;
  /* gray-200 */
  --accent: #60a5fa;
  /* blue-400 */
  --accent-2: #f97316;
  /* orange-500 */
  --ok: #22c55e;
  /* green-500 */
  --warn: #f59e0b;
  /* amber-500 */
  --danger: #ef4444;
  /* red-500 */
  --shadow: 0 10px 25px rgba(0, 0, 0, .25);
  --radius: 18px;
}

* {
  box-sizing: border-box
}

html,
body {
  height: 100%
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: linear-gradient(160deg, #0b1024, #0a162f 50%, #0b223b);
  color: var(--text);
  -webkit-font-smoothing: antialiased
}

.app {
  max-width: 820px;
  margin: 0 auto;
  padding: clamp(16px, 3vw, 28px);
  display: grid;
  gap: 16px
}

/* =====================================================
   HEADER LAYOUT - FIXED AND IMPROVED
   ===================================================== */

/* App Header Container */
.app-header {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 16px;
}

/* Row 1: Branding + Essential Controls */
.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

/* Row 2: Status Chips + Actions */
.status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.stats-container {
  flex: 1;
  min-width: 0; /* Allow shrinking */
  overflow: hidden;
}

.stats {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.status-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* Row 3: Progress Bar */
.progress-row {
  width: 100%;
}

.progress-container {
  margin: 0;
}

/* Stat Chips - Consistent sizing */
.stat {
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .06);
  padding: 10px 12px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: .3s all;
  min-height: 44px; /* Touch target minimum */
  white-space: nowrap;
  flex-shrink: 0;
}

.stat > span:first-child {
  font-size: 13px;
  color: var(--muted);
  font-weight: 500;
}

.stat b {
  font-size: 18px;
  min-width: 20px; /* Prevent jumping when numbers change */
  text-align: center;
}

.stat .medal,
.stat .star {
  font-size: 18px;
  filter: drop-shadow(0 2px 3px rgba(0, 0, 0, .4));
}

.stat .medal {
  animation: pulse 2s ease-in-out infinite;
}

/* Mascot positioning - ensure it stays in status-row */
.mascot {
  font-size: 48px;
  transition: .3s all;
  filter: drop-shadow(0 4px 6px rgba(0, 0, 0, .3));
  cursor: pointer;
  flex-shrink: 0;
  /* Reset any positioning that might cause it to float */
  position: static;
  float: none;
  margin: 0;
}

.mascot:hover {
  transform: scale(1.1) rotate(5deg);
}

.mascot.happy {
  animation: mascot-happy .6s ease;
}

.mascot.excited {
  animation: mascot-excited .8s ease;
}

/* Button consistency */
.btn-icon-large {
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .06);
  color: var(--text);
  cursor: pointer;
  padding: 10px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  transition: .3s all;
  min-height: 44px;
  min-width: 44px;
  flex-shrink: 0;
}

.btn-icon-large:hover {
  background: rgba(239, 68, 68, .2);
  border-color: var(--danger);
  color: var(--danger);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 12px;
  font-size: 13px;
  border-radius: 10px;
  min-height: 36px;
  font-weight: 600;
}

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

/* Mobile: ≤480px */
@media (max-width: 480px) {
  .app-header {
    gap: 12px;
  }

  .header-row {
    gap: 8px;
  }

  .brand h1 {
    font-size: 20px;
  }

  .header-controls {
    gap: 6px;
  }

  /* Status row: stack vertically with proper spacing */
  .status-row {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    flex-wrap: nowrap;
  }

  /* Stats container: horizontal scroll */
  .stats-container {
    width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE/Edge */
  }

  .stats-container::-webkit-scrollbar {
    display: none; /* Chrome/Safari */
  }

  .stats {
    flex-wrap: nowrap;
    gap: 8px;
    padding-bottom: 4px;
    /* Scroll snap for better UX */
    scroll-snap-type: x mandatory;
  }

  .stat {
    flex-shrink: 0;
    scroll-snap-align: start;
    min-width: fit-content;
  }

  /* Status actions: always visible, side by side */
  .status-actions {
    width: 100%;
    justify-content: space-between;
    flex-shrink: 0;
  }

  .mascot {
    font-size: 40px;
  }

  /* Smaller buttons on mobile */
  .btn-sm {
    padding: 8px 10px;
    font-size: 12px;
  }

  .btn-icon-large {
    min-height: 40px;
    min-width: 40px;
    padding: 8px;
  }
}

/* Tablet: 481px - 768px */
@media (min-width: 481px) and (max-width: 768px) {
  .stats {
    flex-wrap: wrap;
    gap: 10px;
  }

  .status-row {
    align-items: center;
  }

  .mascot {
    font-size: 44px;
  }
}

/* Desktop: ≥769px */
@media (min-width: 769px) {
  .header-row {
    flex-wrap: nowrap;
  }

  .stats {
    flex-wrap: nowrap;
    gap: 12px;
  }

  .status-row {
    align-items: center;
    flex-wrap: nowrap;
  }
}

/* =====================================================
   ORIGINAL STYLES (preserved)
   ===================================================== */


.logo {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: radial-gradient(120px 70px at 30% 30%, #60a5fa22, transparent), linear-gradient(135deg, #0f2a4b, #13243f);
  display: grid;
  place-items: center;
  box-shadow: var(--shadow)
}

.logo span {
  font-size: 22px
}

h1 {
  font-size: clamp(20px, 2.4vw, 28px);
  margin: 0;
  letter-spacing: .3px
}

.panel {
  background: linear-gradient(180deg, rgba(255, 255, 255, .03), rgba(255, 255, 255, .02));
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: var(--radius);
  padding: clamp(14px, 2.2vw, 20px);
  box-shadow: var(--shadow)
}

.word-card {
  text-align: center;
  padding: 28px 16px;
  display: grid;
  gap: 18px;
  position: relative;
  overflow: visible
}

.word {
  font-size: clamp(40px, 8vw, 76px);
  font-weight: 800;
  letter-spacing: 1px;
  line-height: 1.05;
  word-break: break-word;
  transition: .3s transform
}

.word.bounce {
  animation: bounce .6s ease
}

.syllable {
  padding: 0 .08em;
  border-radius: 8px
}

.syllable:nth-child(odd) {
  color: var(--accent)
}

.syllable:nth-child(even) {
  color: var(--accent-2)
}

.syllable-btn {
  appearance: none;
  border: 1px solid rgba(255, 255, 255, .12);
  background: rgba(255, 255, 255, .06);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 8px;
  font-weight: 800;
  font-size: clamp(40px, 8vw, 76px);
  cursor: pointer;
  transition: .2s transform, .2s background, .2s border-color, .2s box-shadow;
  box-shadow: 0 6px 16px rgba(0, 0, 0, .25)
}

.syllable-btn:hover {
  transform: translateY(-2px) scale(1.05);
  border-color: rgba(255, 255, 255, .24);
  box-shadow: 0 8px 20px rgba(96, 165, 250, .3)
}

.syllable-btn:active {
  transform: translateY(0) scale(.98)
}

.syllable-btn.clicked {
  animation: syllable-pop .4s ease
}

.actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  align-items: center;
  justify-items: stretch
}

.actions button {
  width: 100%
}

.toolbar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center
}

button {
  appearance: none;
  border: 1px solid rgba(255, 255, 255, .12);
  background: rgba(255, 255, 255, .06);
  color: var(--text);
  padding: 12px 14px;
  border-radius: 14px;
  font-weight: 650;
  font-size: 16px;
  cursor: pointer;
  transition: .2s transform, .2s background, .2s border-color;
  box-shadow: 0 6px 16px rgba(0, 0, 0, .25);
  user-select: none
}

button:hover {
  transform: translateY(-1px);
  border-color: rgba(255, 255, 255, .24);
  background: rgba(255, 255, 255, .08)
}

button:active {
  transform: translateY(0) scale(.98)
}

.btn-primary {
  background: linear-gradient(180deg, #2563eb, #1d4ed8);
  border-color: #3b82f6
}

.btn-primary:hover {
  background: linear-gradient(180deg, #3b82f6, #2563eb)
}

.btn-good {
  background: linear-gradient(180deg, #16a34a, #15803d);
  border-color: #22c55e
}

.btn-good:hover {
  background: linear-gradient(180deg, #22c55e, #16a34a)
}

.btn-help {
  background: linear-gradient(180deg, #f59e0b, #b45309);
  border-color: #fbbf24
}

.btn-help:hover {
  background: linear-gradient(180deg, #fbbf24, #f59e0b)
}

.btn-ghost {
  background: rgba(255, 255, 255, .06)
}

.stars {
  display: flex;
  gap: 4px;
  align-items: center;
  flex-wrap: wrap
}

.star {
  font-size: 20px;
  filter: drop-shadow(0 2px 2px rgba(0, 0, 0, .3));
  animation: star-appear .5s ease-out
}

.star-grow {
  animation: star-grow .6s ease-out
}

.message {
  text-align: center;
  color: var(--muted);
  min-height: 20px
}

details.config {
  background: rgba(255, 255, 255, .04);
  border: 1px dashed rgba(255, 255, 255, .12);
  border-radius: 14px;
  padding: 8px 12px
}

details[open].config {
  border-style: solid
}

summary {
  cursor: pointer;
  font-weight: 700;
  color: #c7d2fe
}

textarea {
  width: 100%;
  min-height: 120px;
  resize: vertical;
  background: #0b1222;
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 12px;
  padding: 12px;
  font-size: 15px
}

.confetti {
  position: fixed;
  top: -10px;
  width: 10px;
  height: 14px;
  opacity: .9;
  transform: rotate(0deg);
  animation: fall 1200ms linear forwards
}

@keyframes fall {
  to {
    transform: translateY(100vh) rotate(360deg);
    opacity: .0
  }
}

.progress-container {
  margin-bottom: 8px
}

.progress-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: 6px;
  font-size: 14px;
  color: var(--muted);
  font-weight: 500;
}

.progress-bar {
  width: 100%;
  height: 12px;
  background: rgba(0, 0, 0, .3);
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .08)
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #22c55e, #16a34a, #15803d);
  transition: width .5s ease;
  border-radius: 20px;
  box-shadow: 0 0 10px rgba(34, 197, 94, .5)
}

.word-difficulty {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 8px;
  font-weight: 600;
  opacity: .8
}

.achievement-popup {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  padding: 24px 32px;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, .5);
  font-size: 24px;
  font-weight: 700;
  color: #000;
  z-index: 1000;
  transition: .3s all;
  border: 3px solid #fde047
}

.achievement-popup.show {
  transform: translate(-50%, -50%) scale(1);
  animation: achievement-show .6s ease
}

.achievement-popup .achievement-icon {
  font-size: 64px;
  margin-bottom: 8px
}

@keyframes pulse {

  0%,
  100% {
    transform: scale(1)
  }

  50% {
    transform: scale(1.15)
  }
}

@keyframes bounce {

  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateY(0)
  }

  40% {
    transform: translateY(-20px)
  }

  60% {
    transform: translateY(-10px)
  }
}

@keyframes star-appear {
  0% {
    transform: scale(0) rotate(-180deg);
    opacity: 0
  }

  100% {
    transform: scale(1) rotate(0);
    opacity: 1
  }
}

@keyframes star-grow {
  0% {
    transform: scale(1)
  }

  50% {
    transform: scale(1.4)
  }

  100% {
    transform: scale(1)
  }
}

@keyframes syllable-pop {
  0% {
    transform: scale(1)
  }

  50% {
    transform: scale(1.2);
    background: rgba(96, 165, 250, .3)
  }

  100% {
    transform: scale(1)
  }
}

@keyframes mascot-happy {

  0%,
  100% {
    transform: rotate(0deg)
  }

  25% {
    transform: rotate(-10deg) scale(1.1)
  }

  75% {
    transform: rotate(10deg) scale(1.1)
  }
}

@keyframes mascot-excited {

  0%,
  100% {
    transform: translateY(0) rotate(0deg)
  }

  20% {
    transform: translateY(-15px) rotate(-15deg)
  }

  40% {
    transform: translateY(-10px) rotate(15deg)
  }

  60% {
    transform: translateY(-15px) rotate(-10deg)
  }

  80% {
    transform: translateY(-5px) rotate(10deg)
  }
}

@keyframes achievement-show {
  0% {
    transform: translate(-50%, -50%) scale(0) rotate(-180deg)
  }

  70% {
    transform: translate(-50%, -50%) scale(1.1) rotate(10deg)
  }

  100% {
    transform: translate(-50%, -50%) scale(1) rotate(0deg)
  }
}

footer {
  text-align: center;
  color: var(--muted);
  font-size: 13px
}

@media (max-width:520px) {
  .actions {
    grid-template-columns: 1fr
  }
}

/* Mode Selection Overlay */
.mode-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, .95);
  z-index: 9999;
  display: grid;
  place-items: center;
  backdrop-filter: blur(8px);
  overflow-y: auto;
  padding: 20px;
}

.mode-overlay.hidden {
  display: none
}

.mode-card {
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, .1);
  padding: 40px;
  border-radius: 32px;
  text-align: center;
  max-width: 90%;
  width: min(500px, 100%);
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5)
}

.mode-card h2 {
  margin-top: 0;
  margin-bottom: 30px;
  font-size: 28px
}

.mode-buttons {
  display: grid;
  gap: 20px
}

.mode-btn {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px;
  text-align: left;
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: 20px;
  cursor: pointer;
  transition: .3s all
}

.mode-btn:hover {
  background: rgba(255, 255, 255, .1);
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 10px 20px -5px rgba(0, 0, 0, 0.3)
}

.btn-icon {
  background: none;
  border: none;
  padding: 0;
  margin-left: 4px;
  font-size: 16px;
  opacity: .5;
  cursor: pointer;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: inline-grid;
  place-items: center;
  transition: .2s opacity
}

.btn-icon:hover {
  opacity: 1;
  background: rgba(255, 255, 255, .1)
}

.mode-icon {
  font-size: 42px;
  background: rgba(0, 0, 0, .2);
  width: 80px;
  height: 80px;
  display: grid;
  place-items: center;
  border-radius: 16px
}

.mode-text {
  display: grid;
  gap: 4px
}

.mode-text strong {
  font-size: 22px;
  color: var(--accent)
}

.mode-text small {
  font-size: 15px;
  color: var(--muted)
}

/* Language Selector */
.language-selector {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .12);
  color: var(--text);
  padding: 8px 28px 8px 10px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: .2s all;
  min-height: 36px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23e5e7eb' d='M6 8L2 4h8z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
}

.language-selector:hover {
  background: rgba(255, 255, 255, .08);
  border-color: rgba(255, 255, 255, .24);
}

.language-selector:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.language-selector option {
  background: var(--card);
  color: var(--text);
}

/* Case Toggle */
.uppercase-mode .word,
.uppercase-mode .syllable-btn,
.uppercase-mode .message,
.uppercase-mode .word-difficulty {
  text-transform: uppercase;
}

/* =====================================================
   WRITING MODE
   ===================================================== */

.writing-image {
  font-size: 100px;
  line-height: 1;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, .3));
}

.writing-listen-btn {
  font-size: 48px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: linear-gradient(180deg, rgba(96, 165, 250, .2), rgba(96, 165, 250, .1));
  border: 2px solid var(--accent);
  cursor: pointer;
  display: grid;
  place-items: center;
  margin: 0 auto;
  transition: .2s all;
}

.writing-listen-btn:hover {
  transform: scale(1.1);
  background: rgba(96, 165, 250, .3);
}

.writing-speaker-mini {
  font-size: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(96, 165, 250, .15);
  border: 1px solid rgba(96, 165, 250, .3);
  cursor: pointer;
  display: grid;
  place-items: center;
  margin: 0 auto;
  transition: .2s all;
  padding: 0;
}

.writing-speaker-mini:hover {
  background: rgba(96, 165, 250, .3);
  transform: scale(1.1);
}

.writing-slots {
  display: flex;
  gap: 6px;
  justify-content: center;
  flex-wrap: wrap;
  margin: 12px 0;
}

.writing-slot {
  width: 48px;
  height: 56px;
  border: 2px dashed rgba(255, 255, 255, .25);
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
  cursor: pointer;
  transition: .2s all;
  background: rgba(255, 255, 255, .04);
}

.writing-slot.filled {
  border-style: solid;
  border-color: var(--accent);
  background: rgba(96, 165, 250, .15);
}

.writing-slot.correct {
  border-color: var(--ok);
  background: rgba(34, 197, 94, .2);
  animation: slot-correct .5s ease;
}

.writing-slot.wrong {
  border-color: var(--danger);
  background: rgba(239, 68, 68, .2);
  animation: shake .5s ease;
}

.writing-letters {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
  margin: 12px 0;
}

.writing-letter-btn {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  font-size: 22px;
  font-weight: 800;
  display: grid;
  place-items: center;
  cursor: pointer;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .15);
  color: var(--text);
  transition: .2s all;
  box-shadow: 0 4px 12px rgba(0, 0, 0, .2);
  padding: 0;
}

.writing-letter-btn:hover {
  transform: translateY(-2px) scale(1.05);
  border-color: var(--accent);
  background: rgba(96, 165, 250, .2);
}

.writing-letter-btn.used {
  opacity: .3;
  pointer-events: none;
  transform: scale(.9);
}

.uppercase-mode .writing-slot,
.uppercase-mode .writing-letter-btn {
  text-transform: uppercase;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 50%, 90% { transform: translateX(-6px); }
  30%, 70% { transform: translateX(6px); }
}

@keyframes slot-correct {
  0% { transform: scale(1); }
  50% { transform: scale(1.15); }
  100% { transform: scale(1); }
}