:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #1a1c1e;
  --subtext: #5f6b7a;
  --primary: #2563eb;
  --primary-600: #1d4ed8;
  --border: #e5e7eb;
  --ring: rgba(37, 99, 235, 0.15);
  --shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 16px 40px -6px rgba(0, 0, 0, 0.15);
  --radius: 16px;
  --skeleton: #f0f2f5;
  --transition: all 0.2s cubic-bezier(0.25, 0.8, 0.25, 1);
  --font-main: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --font-mono: "JetBrains Mono", Monaco, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0c12;
    --card: #11141d;
    --text: #e6e8eb;
    --subtext: #8a93a6;
    --primary: #60a5fa;
    --primary-600: #3b82f6;
    --border: #2d3748;
    --ring: rgba(96, 165, 250, 0.2);
    --shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 16px 40px -6px rgba(0, 0, 0, 0.35);
    --skeleton: #1a1f2c;
  }
}

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

html {
  font-size: 16px;
}

body {
  height: 100vh;
  margin: 0;
  font-family: var(--font-main);
  color: var(--text);
  background: 
    radial-gradient(1200px 600px at 70% -100px, rgba(59, 130, 246, 0.1), transparent 60%),
    radial-gradient(1000px 500px at -10% 10%, rgba(99, 102, 241, 0.06), transparent 60%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding: 32px 16px;
  display: flex;
  justify-content: center;
  align-items: start;
  overflow-y: auto;
}

.app {
  width: 100%;
  max-width: 920px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: box-shadow 0.3s ease;
}

.app:hover {
  box-shadow: var(--shadow-hover);
}

/* === HEADER === */
.header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 24px 28px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(0deg, rgba(0, 0, 0, 0.01), rgba(99, 102, 241, 0.04));
  backdrop-filter: blur(4px);
}

.header__icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: 
    radial-gradient(120px 70px at 30% 20%, rgba(37, 99, 235, 0.18), transparent 70%),
    linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(99, 102, 241, 0.1));
  color: var(--primary);
  font-size: 1.2em;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.08);
}

.header__title {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.3px;
  line-height: 1.2;
}

.header__subtitle {
  font-size: 0.92rem;
  color: var(--subtext);
  line-height: 1.4;
}


.controls {
  padding: 20px 28px 16px;
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 14px;
}

.field {
  position: relative;
}

.field input[type="text"] {
  width: 100%;
  padding: 16px 48px 16px 48px;
  border: 1.5px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: 14px;
  font-size: 1rem;
  outline: none;
  transition: var(--transition);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.field input::placeholder {
  color: var(--subtext);
  opacity: 0.7;
}

.field input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 8px var(--ring);
  transform: translateY(-1px);
}

.field .field__icon-left {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--subtext);
  font-size: 1rem;
  transition: var(--transition);
}

.field input:focus + .field__icon-left {
  color: var(--primary);
}

.field .field__kbd {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-variant-numeric: tabular-nums;
  font-size: 0.82rem;
  padding: 3px 7px;
  border-radius: 6px;
  border: 1px solid var(--border);
  color: var(--subtext);
  background: rgba(0, 0, 0, 0.02);
  font-family: var(--font-mono);
  user-select: none;
  transition: var(--transition);
}

/* === BUTTON === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 20px;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  border: 0;
  border-radius: 14px;
  cursor: pointer;
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
  transition: var(--transition);
  font-size: 1rem;
}

.btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 10px 20px rgba(37, 99, 235, 0.35);
}

.btn:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.btn .spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}


.status {
  padding: 0 28px 16px;
  color: var(--subtext);
  font-size: 0.9rem;
  font-style: italic;
  display: none;
  min-height: 20px;
}


.output {
  border-top: 1px solid var(--border);
  padding: 20px 28px 28px;
}

.card {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--card);
  padding: 22px;
  min-height: 160px;
  backdrop-filter: blur(2px);
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.04);
  transition: var(--transition);
  opacity: 0;
  transform: translateY(10px);
  animation: fadeIn 0.4s ease forwards 0.1s;
}

.card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.empty {
  display: grid;
  place-items: center;
  gap: 12px;
  min-height: 140px;
  color: var(--subtext);
  font-size: 1.1rem;
  text-align: center;
  line-height: 1.5;
}

.empty i {
  font-size: 1.8rem;
  opacity: 0.5;
}


.definition {
  line-height: 1.8;
  font-size: 1.1rem;
  word-wrap: break-word;
  color: var(--text);
}

.definition p {
  margin: 0 0 14px;
}

.definition code {
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary-600);
  padding: 0.2em 0.4em;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.95em;
}


.clickable-word {
  cursor: pointer;
  transition: var(--transition);
  border-radius: 6px;
  padding: 0 2px;
  position: relative;
  font-weight: 500;
}

.clickable-word::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 6px;
  background: rgba(37, 99, 235, 0.1);
  opacity: 0;
  transition: opacity 0.15s ease;
  z-index: -1;
}

.clickable-word:hover {
  color: var(--primary-600);
  background: rgba(37, 99, 235, 0.12);
  text-decoration: none;
}

.clickable-word:hover::before {
  opacity: 1;
}


.skeleton {
  height: 16px;
  background: var(--skeleton);
  border-radius: 8px;
  overflow: hidden;
  position: relative;
  margin-bottom: 12px;
}

.skeleton:last-child {
  width: 70%;
}

.skeleton::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5), transparent);
  transform: translateX(-100%);
  animation: shimmer 1.5s infinite ease-in-out;
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%);
  }
  50% {
    transform: translateX(100%);
  }
  100% {
    transform: translateX(100%);
  }
}

@keyframes fadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}


.footer {
  border-top: 1px solid var(--border);
  padding: 14px 28px;
  color: var(--subtext);
  font-size: 0.88rem;
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: flex-start;
  background: rgba(0, 0, 0, 0.01);
  font-variant-numeric: tabular-nums;
}

.kbd-tip {
  border: 1px solid var(--border);
  padding: 3px 8px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: rgba(0, 0, 0, 0.03);
  transition: var(--transition);
}

.definition-entry {
  padding-bottom: 20px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.definition-entry:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.definition-entry h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
  text-transform: capitalize;
}

@media (max-width: 480px) {
  .controls {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .btn {
    padding: 14px;
  }

  .footer {
    font-size: 0.82rem;
    flex-wrap: wrap;
    gap: 6px;
  }

  .kbd-tip {
    font-size: 0.8em;
    padding: 2px 6px;
  }
}

.field .field__icon-right {
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--subtext);
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
}

.field .field__icon-right:hover {
  color: var(--primary);
}