:root {
  --bg: #f8f9fa;
  --card-bg: #ffffff;
  --primary: #6366f1;
  --primary-light: #818cf8;
  --primary-dark: #4f46e5;
  --text: #1e293b;
  --text-secondary: #64748b;
  --border: #e2e8f0;
  --success: #22c55e;
  --error: #ef4444;
  --warning: #f59e0b;
  --pass-line: #f97316;
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

/* Header */
header {
  text-align: center;
  margin-bottom: 2.5rem;
  animation: fadeInDown 0.6s ease;
}

.emoji {
  font-size: 4rem;
  margin-bottom: 0.5rem;
  animation: bounce 2s infinite;
  display: inline-block;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

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

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(-10px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

h1 {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* Rules */
.rules-card {
  background: linear-gradient(135deg, #fef3c7, #fde68a);
  border-radius: 1rem;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
  border: 1px solid #fcd34d;
  animation: fadeInUp 0.5s ease 0.1s both;
}

.rules-content {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.rule-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.rule-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.rule-text {
  font-size: 0.95rem;
  color: var(--text);
  line-height: 1.5;
}

.rule-text strong {
  color: #92400e;
}

.rule-text .highlight {
  background: #fef08a;
  padding: 0.15rem 0.4rem;
  border-radius: 0.35rem;
  font-weight: 700;
  color: #92400e;
}

/* Form */
.guess-form {
  margin-bottom: 2.5rem;
  animation: fadeInUp 0.5s ease 0.2s both;
}

.form-card {
  background: var(--card-bg);
  border-radius: 1.5rem;
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}

.form-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px dashed var(--border);
}

.form-emoji {
  font-size: 1.25rem;
}

.form-title {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
}

.input-group {
  margin-bottom: 1.5rem;
}

.input-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text);
  font-size: 0.9rem;
}

.input-group input[type="text"],
.input-group input[type="number"] {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--border);
  border-radius: 0.75rem;
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}

.input-group input[type="text"]:focus,
.input-group input[type="number"]:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgb(99 102 241 / 0.1);
}

.score-input-wrap {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.slider-wrap {
  flex: 1;
  min-width: 200px;
  position: relative;
}

input[type="range"] {
  width: 100%;
  height: 8px;
  -webkit-appearance: none;
  appearance: none;
  background: linear-gradient(to right, #fecaca, #fde68a, #86efac, #93c5fd);
  border-radius: 4px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 28px;
  height: 28px;
  background: var(--primary);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow);
  border: 3px solid white;
  transition: transform 0.15s;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

input[type="range"]::-moz-range-thumb {
  width: 28px;
  height: 28px;
  background: var(--primary);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow);
  border: 3px solid white;
}

.score-display {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

#scoreInput {
  width: 90px;
  padding: 0.75rem;
  border: 2px solid var(--border);
  border-radius: 0.75rem;
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  color: var(--primary);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

#scoreInput:focus {
  border-color: var(--primary-light);
}

#scoreInput.taken {
  border-color: var(--error);
  color: var(--error);
  background: #fef2f2;
}

#scoreInput.available {
  border-color: var(--success);
  color: var(--success);
  background: #f0fdf4;
}

.unit {
  font-size: 1rem;
  color: var(--text-secondary);
}

.slider-marks {
  position: relative;
  height: 4px;
  margin-top: -6px;
  margin-bottom: 6px;
  pointer-events: none;
}

.slider-mark {
  position: absolute;
  top: 0;
  width: 6px;
  height: 6px;
  background: var(--error);
  border-radius: 50%;
  transform: translateX(-50%);
  opacity: 0.6;
}

.score-hints {
  position: relative;
  margin-top: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-secondary);
  height: 1.2em;
}

.score-hints span:first-child {
  position: absolute;
  left: 0;
}

.score-hints span:last-child {
  position: absolute;
  right: 0;
}

.pass-line {
  position: absolute;
  transform: translateX(-50%);
  color: var(--pass-line);
  font-weight: 600;
  white-space: nowrap;
}

/* 425 mark on slider track */
.slider-pass-mark {
  position: absolute;
  top: -2px;
  width: 2px;
  height: 12px;
  background: var(--pass-line);
  border-radius: 1px;
  transform: translateX(-50%);
  pointer-events: none;
  opacity: 0.8;
}

.score-status {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  min-height: 1.4em;
  transition: all 0.2s;
}

.score-status.taken {
  color: var(--error);
}

.score-status.available {
  color: var(--success);
}

/* Locked View */
.locked-card {
  text-align: center;
  padding: 2rem 1rem;
  animation: fadeIn 0.4s ease;
}

.locked-emoji {
  font-size: 3rem;
  margin-bottom: 0.5rem;
  animation: pulse 2s infinite;
}

.locked-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.locked-detail {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.locked-detail .score-highlight {
  color: var(--primary);
  font-weight: 800;
  font-size: 1.5rem;
}

.reset-btn {
  padding: 0.5rem 1rem;
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
}

.reset-btn:hover {
  background: var(--bg);
  color: var(--text);
}

/* Submit */
.submit-btn {
  width: 100%;
  padding: 1rem;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  border: none;
  border-radius: 0.75rem;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

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

.submit-btn:active:not(:disabled) {
  transform: translateY(0);
}

.submit-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.error-msg {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  background: #fef2f2;
  color: var(--error);
  border-radius: 0.5rem;
  font-size: 0.9rem;
  display: none;
  border-left: 3px solid var(--error);
  animation: slideIn 0.3s ease;
}

.success-msg {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  background: #f0fdf4;
  color: var(--success);
  border-radius: 0.5rem;
  font-size: 0.9rem;
  display: none;
  border-left: 3px solid var(--success);
  animation: slideIn 0.3s ease;
}

/* Stats */
.visualization {
  margin-bottom: 2.5rem;
  animation: fadeInUp 0.5s ease 0.3s both;
}

.visualization h2,
.guess-list h2 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat {
  background: var(--card-bg);
  padding: 1rem;
  border-radius: 1rem;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: transform 0.2s;
}

.stat:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.stat-num {
  display: block;
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary);
  transition: color 0.3s;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Chart — Score Axis */
.chart-container {
  background: var(--card-bg);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  overflow-x: auto;
}

.score-axis {
  position: relative;
  height: 160px;
  min-width: 700px;
  padding: 2rem 0.5rem 0;
}

.axis-track {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(to right, #fecaca, #fde68a, #86efac, #93c5fd);
  border-radius: 2px;
  transform: translateY(-50%);
}

.axis-mark {
  position: absolute;
  top: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 1;
}

.axis-tick {
  width: 2px;
  height: 12px;
  background: var(--text-secondary);
  opacity: 0.5;
}

.axis-label {
  margin-top: 4px;
  font-size: 0.7rem;
  color: var(--text-secondary);
  white-space: nowrap;
}

.axis-mark.pass-mark .axis-tick {
  height: 16px;
  background: var(--pass-line);
  opacity: 1;
}

.axis-mark.pass-mark .axis-label {
  color: var(--pass-line);
  font-weight: 700;
}

.axis-dots {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
}

.axis-dot {
  position: absolute;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
  pointer-events: auto;
  transition: transform 0.2s;
}

.axis-dot:hover {
  transform: translateX(-50%) scale(1.1);
  z-index: 10;
}

.dot-top {
  top: 8px;
}

.dot-bottom {
  bottom: 8px;
  flex-direction: column-reverse;
}

.dot-orb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
  border: 2px solid white;
  transition: all 0.2s;
}

.axis-dot:hover .dot-orb {
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.6);
  transform: scale(1.2);
}

.dot-name {
  margin-top: 4px;
  margin-bottom: 4px;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text);
  max-width: 40px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: center;
}

.axis-avg {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: repeating-linear-gradient(to bottom, var(--pass-line) 0, var(--pass-line) 4px, transparent 4px, transparent 8px);
  transform: translateX(-50%);
  pointer-events: none;
  z-index: 2;
}

.axis-avg-label {
  position: absolute;
  top: -4px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.65rem;
  color: var(--pass-line);
  font-weight: 700;
  padding: 0.15rem 0.4rem;
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid var(--pass-line);
  border-radius: 0.35rem;
  white-space: nowrap;
  pointer-events: none;
  z-index: 3;
}

/* Guess List */
.guess-list {
  animation: fadeInUp 0.5s ease 0.4s both;
}

.guess-cards {
  display: grid;
  gap: 0.75rem;
}

.guess-card {
  background: var(--card-bg);
  border-radius: 1rem;
  padding: 1rem 1.25rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: transform 0.2s, box-shadow 0.2s;
  animation: slideIn 0.4s ease backwards;
}

.guess-card:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-lg);
}

.guess-rank {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.guess-rank.top1 {
  background: linear-gradient(135deg, #fcd34d, #f59e0b);
  color: white;
}

.guess-rank.top2 {
  background: linear-gradient(135deg, #e5e7eb, #9ca3af);
  color: white;
}

.guess-rank.top3 {
  background: linear-gradient(135deg, #fdba74, #ea580c);
  color: white;
}

.guess-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}

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

.guess-name {
  font-weight: 700;
  font-size: 1rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.guess-time {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.guess-score {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  flex-shrink: 0;
}

.guess-message {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
  font-style: italic;
  word-break: break-all;
}

.empty-state {
  text-align: center;
  padding: 3rem;
  color: var(--text-secondary);
  background: var(--card-bg);
  border-radius: 1rem;
  border: 2px dashed var(--border);
}

.empty-emoji {
  font-size: 3rem;
  margin-bottom: 0.5rem;
  animation: bounce 2s infinite;
}

.empty-sub {
  font-size: 0.9rem;
  margin-top: 0.25rem;
  opacity: 0.7;
}

/* Footer */
.site-footer {
  text-align: center;
  padding: 2rem 1rem;
  margin-top: 1rem;
  color: var(--text-secondary);
  font-size: 0.8rem;
  animation: fadeIn 0.5s ease 0.5s both;
}

.site-footer p {
  margin: 0;
}

/* Chart placeholder */
.chart-placeholder {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-secondary);
  font-size: 1rem;
}

/* Responsive */
@media (max-width: 800px) {
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  h1 { font-size: 1.75rem; }
  .form-card { padding: 1.5rem; }
  .score-input-wrap { flex-direction: column; align-items: stretch; }
  .guess-card { padding: 0.75rem 0.875rem; gap: 0.625rem; }
  .guess-rank { width: 26px; height: 26px; font-size: 0.75rem; }
  .guess-avatar { width: 36px; height: 36px; font-size: 0.85rem; }
  .guess-score { font-size: 1.2rem; }
  .guess-name { font-size: 0.95rem; }
}