:root {
  --bg-primary: #040d1a;
  --bg-secondary: #0a1424;
  --bg-tile: #101c30;
  --bg-tile-filled: #182844;
  --border-tile: #1f3456;
  --border-tile-active: #325080;

  --color-correct: #2ecc71;
  --color-correct-glow: #2ecc7140;
  --color-present: #e67e22;
  --color-present-glow: #e67e2240;
  --color-absent: #20304a;
  --color-absent-key: #1a263d;

  --text-primary: #e8eaf0;
  --text-secondary: #8a9cbd;
  --text-dim: #4d648a;

  --key-bg: #182844;
  --key-bg-hover: #22385c;

  --accent-1: #1b4d8e;
  --accent-2: #f4c542;
  --accent-glow: #1b4d8e30;

  --font-display: 'Outfit', sans-serif;
  --font-mono: 'Space Mono', monospace;

  --tile-size: clamp(52px, 12vw, 68px);
  --tile-gap: clamp(4px, 1vw, 8px);
  --key-height: clamp(48px, 8vh, 58px);
  --border-radius: 10px;

  --transition-flip: 500ms;
  --transition-bounce: 300ms;
}

body {
  --rows: 6;
}

body.mode-dueto {
  --rows: 7;
  --tile-size: clamp(34px, 7.5vw, 48px);
  --tile-gap: clamp(4px, 1vw, 6px);
}

body.mode-quarteto {
  --rows: 9;
  --tile-size: clamp(22px, 5.5vw, 34px);
  --tile-gap: clamp(3px, 0.8vw, 4px);
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: var(--font-display);
  background: var(--bg-primary);
  color: var(--text-primary);
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  -webkit-user-select: none;
  user-select: none;
}

.noise-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

.glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
  animation: glow-drift 12s ease-in-out infinite alternate;
}

.glow-1 {
  width: 400px;
  height: 400px;
  background: #2ecc7125;
  top: -100px;
  left: -100px;
}

.glow-2 {
  width: 300px;
  height: 300px;
  background: #1b4d8e25;
  bottom: -50px;
  right: -50px;
  animation-delay: -6s;
}

@keyframes glow-drift {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(40px, 30px) scale(1.15); }
}

header {
  position: relative;
  z-index: 10;
  padding: 12px 20px;
  border-bottom: 1px solid #ffffff08;
  backdrop-filter: blur(20px);
  background: #0a0a0f99;
  flex-shrink: 0;
}

.header-content {
  max-width: 500px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.header-left {
  position: absolute;
  left: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

#logo {
  display: flex;
  gap: 2px;
  font-size: clamp(1.6rem, 5vw, 2rem);
  font-weight: 900;
  letter-spacing: 0.08em;
  cursor: default;
}

.logo-letter {
  display: inline-block;
  animation: logo-in 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) both;
  animation-delay: calc(var(--i) * 80ms);
}

.logo-letter.accent {
  color: var(--accent-2);
  text-shadow: 0 0 30px var(--accent-glow);
}

@keyframes logo-in {
  from {
    opacity: 0;
    transform: translateY(-20px) scale(0.5);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.header-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.mode-dropdown-container {
  position: relative;
}

.mode-toggle {
  background: rgba(16, 28, 48, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 8px;
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: all 0.2s ease;
}

.mode-toggle:hover {
  background: rgba(16, 28, 48, 0.8);
  color: var(--text-primary);
}

.mode-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: var(--bg-tile);
  border: 1px solid var(--border-tile);
  border-radius: 8px;
  padding: 4px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 110px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.5);
  z-index: 100;
  opacity: 1;
  pointer-events: auto;
  transition: opacity 0.2s, transform 0.2s;
}

.mode-dropdown.hidden {
  opacity: 0;
  transform: translateX(-50%) translateY(-4px);
  pointer-events: none;
}

.mode-option {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
  text-align: center;
  transition: all 0.2s ease;
}

.mode-option:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.mode-option.active {
  color: var(--text-primary);
  background: var(--bg-correct);
}

#stats-btn {
  position: absolute;
  right: 0;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

#stats-btn:hover {
  color: var(--text-primary);
  background: #ffffff08;
}

#game {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
  z-index: 1;
  padding: 8px 0;
  gap: 8px;
  min-height: 0;
}

#board-container {
  flex: 1;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  overflow-y: auto;
  overflow-x: hidden;
  min-height: 0;
}

#boards-container {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-start;
  justify-content: center;
  max-width: 100vw;
  padding: 8px;
  margin: auto;
}

.board {
  display: grid;
  grid-template-rows: repeat(var(--rows, 6), var(--tile-size));
  gap: var(--tile-gap);
  padding: 4px;
  transition: opacity 0.3s ease, filter 0.3s ease;
}

.board.finished {
  opacity: 0.5;
  filter: grayscale(0.5);
}

.row {
  display: grid;
  grid-template-columns: repeat(5, var(--tile-size));
  gap: var(--tile-gap);
}

.tile {
  width: var(--tile-size);
  height: var(--tile-size);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 4vw, 1.8rem);
  font-weight: 700;
  text-transform: uppercase;
  border: 2px solid var(--border-tile);
  border-radius: var(--border-radius);
  background: var(--bg-tile);
  color: var(--text-primary);
  transition: border-color 0.15s ease, transform 0.1s ease;
  position: relative;
  perspective: 600px;
}

.tile.filled {
  border-color: var(--border-tile-active);
  background: var(--bg-tile-filled);
  animation: tile-pop var(--transition-bounce) cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes tile-pop {
  0% { transform: scale(1); }
  50% { transform: scale(1.12); }
  100% { transform: scale(1); }
}

.tile.flip {
  animation: tile-flip var(--transition-flip) ease-in-out;
}

@keyframes tile-flip {
  0% {
    transform: rotateX(0deg);
  }
  45% {
    transform: rotateX(90deg);
  }
  55% {
    transform: rotateX(90deg);
  }
  100% {
    transform: rotateX(0deg);
  }
}

.tile.correct {
  background: var(--color-correct);
  border-color: var(--color-correct);
  color: #fff;
  box-shadow: 0 0 20px var(--color-correct-glow), inset 0 0 8px #ffffff15;
}

.tile.present {
  background: var(--color-present);
  border-color: var(--color-present);
  color: #fff;
  box-shadow: 0 0 20px var(--color-present-glow), inset 0 0 8px #ffffff15;
}

.tile.absent {
  background: var(--color-absent);
  border-color: var(--color-absent);
  color: var(--text-secondary);
}

.tile.shake {
  animation: tile-shake 0.5s ease;
}

@keyframes tile-shake {
  0%, 100% { transform: translateX(0); }
  10%, 50%, 90% { transform: translateX(-4px); }
  30%, 70% { transform: translateX(4px); }
}

.tile.bounce {
  animation: tile-bounce 0.6s ease;
}

@keyframes tile-bounce {
  0%, 100% { transform: translateY(0); }
  40% { transform: translateY(-20px); }
  60% { transform: translateY(-10px); }
}

#keyboard {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 0 6px 10px;
  width: 100%;
  max-width: 520px;
  flex-shrink: 0;
}

.keyboard-row {
  display: flex;
  gap: 5px;
  justify-content: center;
}

.key {
  font-family: var(--font-display);
  font-size: clamp(0.75rem, 2.5vw, 0.95rem);
  font-weight: 600;
  text-transform: uppercase;
  height: var(--key-height);
  min-width: clamp(28px, 7.5vw, 40px);
  padding: 0 4px;
  border: none;
  border-radius: 8px;
  background: var(--key-bg);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
  position: relative;
  overflow: hidden;
}

.key::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #ffffff08, transparent);
  border-radius: inherit;
  pointer-events: none;
}

.key:hover {
  background: var(--key-bg-hover);
  transform: translateY(-1px);
}

.key:active {
  transform: translateY(1px) scale(0.97);
}

.key.wide {
  min-width: clamp(52px, 13vw, 72px);
  font-size: clamp(0.65rem, 2vw, 0.8rem);
}

.key.correct {
  background: var(--color-correct);
  color: #fff;
}

.key.present {
  background: var(--color-present);
  color: #fff;
}

.key.absent {
  background: var(--color-absent-key);
  color: var(--text-dim);
  opacity: 0.4;
}

#toast-container {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: none;
}

.toast {
  padding: 12px 24px;
  background: var(--text-primary);
  color: var(--bg-primary);
  border-radius: 12px;
  font-weight: 700;
  font-size: 0.95rem;
  white-space: nowrap;
  animation: toast-in 0.3s ease, toast-out 0.3s ease 1.5s forwards;
  box-shadow: 0 8px 32px #00000060;
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(-10px) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes toast-out {
  from {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  to {
    opacity: 0;
    transform: translateY(-10px) scale(0.9);
  }
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: #0a0a0fdd;
  backdrop-filter: blur(12px);
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: modal-overlay-in 0.3s ease;
  padding: 20px;
}

.modal-overlay.hidden {
  display: none;
}

@keyframes modal-overlay-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal {
  background: var(--bg-secondary);
  border: 1px solid #ffffff10;
  border-radius: 20px;
  padding: 32px;
  max-width: 400px;
  width: 100%;
  position: relative;
  animation: modal-in 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 20px 60px #00000080, 0 0 80px var(--accent-glow);
}

@keyframes modal-in {
  from {
    opacity: 0;
    transform: scale(0.85) translateY(20px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.8rem;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 8px;
  transition: all 0.2s ease;
  line-height: 1;
}

.modal-close:hover {
  color: var(--text-primary);
  background: #ffffff08;
}

.stats-title {
  font-size: 1.1rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-secondary);
  margin-bottom: 20px;
  text-align: center;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

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

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
}

.stat-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  text-align: center;
  line-height: 1.2;
}

.distribution-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.distribution {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 24px;
}

.dist-row {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.dist-label {
  width: 12px;
  text-align: center;
  color: var(--text-secondary);
  font-weight: 700;
}

.dist-bar {
  min-width: 20px;
  padding: 3px 8px;
  text-align: right;
  border-radius: 4px;
  background: var(--color-absent);
  color: var(--text-primary);
  font-weight: 700;
  font-size: 0.75rem;
  transition: width 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.dist-bar.highlight {
  background: var(--color-correct);
}

.result-section {
  text-align: center;
  padding-top: 16px;
  border-top: 1px solid #ffffff08;
}

.result-word {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.result-word.win {
  background: linear-gradient(135deg, var(--color-correct), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.result-word.lose {
  color: var(--color-present);
}

.result-message {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.share-btn {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 14px 40px;
  background: linear-gradient(135deg, var(--color-correct), #27ae60);
  color: #fff;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 20px var(--color-correct-glow);
}

.share-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--color-correct-glow);
}

.share-btn:active {
  transform: translateY(0);
}

.next-word-timer {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-dim);
}

.next-word-timer span {
  color: var(--accent-2);
  font-weight: 700;
}

#help-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
  outline: none;
}

#help-btn:hover {
  color: var(--text-primary);
  background: #ffffff08;
}

#help-tooltip {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 12px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-tile-active);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(0,0,0,0.5);
  z-index: 1000;
  animation: tooltip-in 0.3s ease;
  pointer-events: none;
}

#help-tooltip.hidden {
  display: none;
}

#help-tooltip::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 14px;
  width: 10px;
  height: 10px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-tile-active);
  border-left: 1px solid var(--border-tile-active);
  transform: rotate(45deg);
}

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

#help-modal-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
  text-align: left;
}

.help-title-container {
  text-align: center;
  margin-bottom: -8px;
}

.help-text {
  font-size: 0.95rem;
  color: var(--text-primary);
  line-height: 1.5;
  margin: 0;
}

.help-example {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.help-row {
  justify-content: flex-start;
  gap: 6px;
}

.help-mini-tile {
  width: clamp(40px, 10vw, 44px);
  height: clamp(40px, 10vw, 44px);
  font-size: 1.2rem;
  border-color: var(--border-tile-active);
  background: var(--bg-tile-filled);
  flex-shrink: 0;
}

.help-strong {
  display: inline-block;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  color: white;
  margin: 0 2px;
  font-size: 0.85em;
  vertical-align: middle;
}

.help-strong.correct-bg { background: var(--color-correct); border-color: var(--color-correct); }
.help-strong.present-bg { background: var(--color-present); border-color: var(--color-present); }
.help-strong.absent-bg { background: var(--color-absent); border-color: var(--color-absent); }

.small-text {
  font-size: 0.8rem;
  color: var(--text-secondary);
  border-top: 1px solid #ffffff10;
  padding-top: 16px;
  margin-top: 0px;
}

@media (max-height: 680px) {
  :root {
    --tile-size: clamp(44px, 9vw, 56px);
    --key-height: clamp(42px, 7vh, 50px);
  }

  header { padding: 8px 16px; }
  #logo { font-size: 1.4rem; }
}

@media (max-height: 580px) {
  :root {
    --tile-size: 42px;
    --tile-gap: 3px;
    --key-height: 40px;
  }
}