/* ============================================================
   MATH RACE CSS
   ============================================================ */

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

:root {
  --font: 'Outfit', system-ui, sans-serif;
  --bg: #0b0914;
  --surface: rgba(255,255,255,0.05);
  --border: rgba(255,255,255,0.1);
  --text: #ffffff;
  --muted: rgba(255,255,255,0.6);
  --p1-color: #3b9eff;
  --p2-color: #ff4d4d;
  --p3-color: #ffd060;
  --p4-color: #2ec97a;
  --correct: #2ec97a;
  --wrong: #ff4d4d;
}

body {
  font-family: var(--font);
  background: var(--bg);
  background-image: radial-gradient(circle at 50% -20%, #2a154a 0%, var(--bg) 60%);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  user-select: none;
}

/* Screens */
.screen {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  width: 100%;
  height: 100vh;
  position: absolute;
  top: 0; left: 0;
}
.screen.active {
  display: flex;
}

/* UI Elements */
h1 {
  font-size: 4rem;
  font-weight: 900;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, #e4adff, #8250df);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-transform: uppercase;
  letter-spacing: -0.02em;
}

p { font-size: 1.2rem; margin-bottom: 2rem; color: var(--muted); }

.menu-options {
  display: flex;
  gap: 15px;
  flex-direction: column;
  width: 300px;
}

.btn {
  font-family: var(--font);
  font-size: 1.2rem;
  font-weight: 700;
  padding: 16px 24px;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
  text-decoration: none;
  text-align: center;
}

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

.btn-primary {
  background: linear-gradient(135deg, #6c32d6, #531fb5);
  color: white;
  box-shadow: 0 4px 15px rgba(108, 50, 214, 0.4);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #7c44ea, #632cd6);
  box-shadow: 0 6px 20px rgba(108, 50, 214, 0.6);
  transform: translateY(-2px);
}

.btn-back {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  margin-top: 10px;
}
.btn-back:hover {
  background: var(--surface);
  color: white;
}

.controls-info {
  margin-top: 40px;
  background: var(--surface);
  padding: 20px 30px;
  border-radius: 12px;
  border: 1px solid var(--border);
}
.controls-info h3 { margin-bottom: 10px; font-size: 1.1rem; color: #e4adff; }
.controls-info p { margin-bottom: 5px; font-size: 1rem; }

.difficulty-select {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 5px;
  width: 300px;
}
.difficulty-select label {
  font-weight: 700;
  color: var(--muted);
}
.diff-dropdown {
  background: var(--surface);
  color: white;
  border: 1px solid var(--border);
  padding: 12px 16px;
  border-radius: 12px;
  font-family: var(--font);
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  outline: none;
}
.diff-dropdown option {
  background: #1a103c;
  color: white;
}

.name-inputs {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 300px;
  margin-top: 15px;
}
.name-input {
  background: var(--surface);
  color: white;
  border: 1px solid var(--border);
  padding: 12px 16px;
  border-radius: 12px;
  font-family: var(--font);
  font-size: 1.1rem;
  outline: none;
  transition: border-color 0.2s;
}
.name-input:focus {
  border-color: #8250df;
}
.name-input::placeholder {
  color: rgba(255,255,255,0.3);
}

/* Match Screen */
.top-bar {
  position: absolute;
  top: 0; left: 0; right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--muted);
  z-index: 100;
  pointer-events: auto;
}

.btn-exit {
  text-decoration: none;
  color: var(--muted);
  font-size: 2rem;
  line-height: 1;
  padding: 5px 15px;
  border-radius: 8px;
  transition: all 0.2s;
}
.btn-exit:hover {
  background: rgba(255,255,255,0.1);
  color: white;
}

.main-arena {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  position: relative;
}

#question-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: opacity 0.2s;
}

#math-problem {
  font-size: 8rem;
  font-weight: 900;
  letter-spacing: -0.05em;
  margin-bottom: 40px;
  text-shadow: 0 0 40px rgba(255,255,255,0.1);
}

#options-grid {
  display: flex;
  gap: 20px;
}

.option-slot {
  background: rgba(255,255,255,0.08);
  border: 2px solid rgba(255,255,255,0.2);
  border-radius: 16px;
  width: 120px;
  height: 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: transform 0.1s, background 0.1s;
}

.solo-mode .option-slot {
  cursor: pointer;
}
.solo-mode .option-slot:not(.correct-flash):not(.wrong-flash):hover {
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.4);
  transform: translateY(-2px);
}
.solo-mode .option-slot:not(.correct-flash):not(.wrong-flash):active {
  transform: translateY(1px) scale(0.96);
}


.opt-label {
  position: absolute;
  top: 10px;
  font-size: 0.9rem;
  font-weight: 700;
  color: rgba(255,255,255,0.4);
}

.opt-val {
  font-size: 3.5rem;
  font-weight: 800;
  margin-top: 15px;
}

.option-slot.correct-flash { background: var(--correct); border-color: var(--correct); transform: scale(1.1); box-shadow: 0 0 30px var(--correct); }
.option-slot.wrong-flash { background: var(--wrong); border-color: var(--wrong); opacity: 0.5; }

#countdown-display {
  font-size: 12rem;
  font-weight: 900;
  color: #ffd060;
  text-shadow: 0 0 50px rgba(255, 208, 96, 0.5);
  position: absolute;
  z-index: 10;
}

.hidden { display: none !important; opacity: 0; pointer-events: none; }

#round-feedback {
  position: absolute;
  z-index: 10;
  border-radius: 20px;
  padding: 30px 60px;
  backdrop-filter: blur(10px);
}
#round-feedback h2 {
  font-size: 4rem;
  font-weight: 900;
  margin: 0;
}

/* Player Cards */
#player-cards {
  display: flex;
  gap: 20px;
  padding: 0 40px 40px;
  width: 100%;
  justify-content: center;
}

.player-card {
  flex: 1;
  max-width: 300px;
  background: var(--surface);
  border: 4px solid var(--border);
  border-radius: 20px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  transition: all 0.3s;
}

.player-card h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 5px;
}

.player-score {
  font-size: 3rem;
  font-weight: 900;
}

.player-status {
  font-size: 1rem;
  font-weight: 700;
  color: var(--muted);
  margin-top: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.player-hotkeys {
  margin-top: 15px;
  padding: 8px 15px;
  background: rgba(0,0,0,0.4);
  border-radius: 8px;
  font-family: monospace;
  font-size: 1.1rem;
  color: rgba(255,255,255,0.8);
  letter-spacing: 0.1em;
}

.p1 { border-color: var(--p1-color); }
.p1 h3 { color: var(--p1-color); }

.p2 { border-color: var(--p2-color); }
.p2 h3 { color: var(--p2-color); }

.p3 { border-color: var(--p3-color); }
.p3 h3 { color: var(--p3-color); }

/* States */
.player-card.locked { opacity: 0.5; filter: grayscale(1); }
.player-card.locked .player-status { color: var(--wrong); }
.player-card.won { transform: translateY(-15px); box-shadow: 0 15px 30px rgba(0,0,0,0.5); }
.player-card.won.p1 { box-shadow: 0 0 40px rgba(59,158,255,0.4); }
.player-card.won.p2 { box-shadow: 0 0 40px rgba(255,77,77,0.4); }
.player-card.won.p3 { box-shadow: 0 0 40px rgba(255,208,96,0.4); }

/* Results */
.result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--surface);
  padding: 20px 40px;
  border-radius: 16px;
  margin-bottom: 10px;
  width: 400px;
  font-size: 1.5rem;
  font-weight: 700;
}
.rank-1 { background: rgba(255, 208, 96, 0.2); border: 2px solid var(--p3-color); color: var(--p3-color); }