:root {
  --bg-color: #fafafa;
  --card-bg: #ffffff;
  --text-main: #18181b;
  --text-muted: #71717a;
  --border-color: #e4e4e7;
  --accent: #18181b;
  --accent-hover: #27272a;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #09090b;
    --card-bg: #18181b;
    --text-main: #f4f4f5;
    --text-muted: #a1a1aa;
    --border-color: #27272a;
    --accent: #f4f4f5;
    --accent-hover: #e4e4e7;
  }
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 40px 20px;
  transition: background-color 0.3s ease;
}

.app-container {
  width: 100%;
  max-width: 720px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.hero {
  text-align: center;
  margin-bottom: 8px;
}

.hero h1 {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.05em;
  margin-bottom: 8px;
}

.hero p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.creation-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-wrapper input {
  width: 100%;
  background: transparent;
  border: 1px solid var(--border-color);
  padding: 16px 64px 16px 16px;
  font-size: 1.1rem;
  font-weight: 500;
  border-radius: var(--radius);
  color: var(--text-main);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.input-wrapper input:focus {
  border-color: var(--text-main);
  box-shadow: 0 0 0 2px rgba(24, 24, 27, 0.05);
}

#char-counter {
  position: absolute;
  right: 16px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  pointer-events: none;
}

#char-counter.warning {
  color: #ef4444;
}

.color-selector {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.color-btn {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.08);
}

.color-btn:hover {
  transform: scale(1.1);
}

.color-btn.active {
  border-color: var(--text-main);
  transform: scale(1.15);
}

#submit-btn {
  background-color: var(--accent);
  color: var(--bg-color);
  border: none;
  border-radius: var(--radius);
  padding: 14px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background-color 0.2s, opacity 0.2s;
}

#submit-btn svg {
  width: 16px;
  height: 16px;
}

#submit-btn:hover {
  background-color: var(--accent-hover);
}

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

#cooldown-message {
  text-align: center;
  font-size: 0.85rem;
  color: #ef4444;
  font-weight: 500;
}

.hidden {
  display: none !important;
}

.wall-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.search-bar {
  position: relative;
  flex: 1;
  min-width: 240px;
}

.search-bar svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--text-muted);
}

.search-bar input {
  width: 100%;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 10px 12px 10px 40px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  color: var(--text-main);
  outline: none;
}

.search-bar input:focus {
  border-color: var(--text-main);
}

.stats {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

#word-wall {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  padding: 8px 0;
}

.word-badge {
  padding: 10px 18px;
  border-radius: 20px;
  font-size: 1rem;
  font-weight: 600;
  color: #1a1a1a;
  transform: rotate(var(--rotation, 0deg));
  transition: transform 0.2s ease;
  box-shadow: 
    0 2px 4px rgba(0,0,0,0.02),
    0 1px 0px rgba(0,0,0,0.04);
  border: 1px solid rgba(0, 0, 0, 0.05);
  user-select: none;
}

.word-badge:hover {
  transform: scale(1.05) rotate(0deg) !important;
  box-shadow: var(--shadow-md);
}

@keyframes pop {
  0% { transform: scale(0.9) translateY(10px); opacity: 0; }
  100% { transform: scale(1) translateY(0); opacity: 1; }
}

.pop-in {
  animation: pop 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}