:root {
  --bg: #f4f1ea;
  --bg-accent: #e4efe7;
  --surface: rgba(255, 255, 255, 0.74);
  --surface-strong: rgba(255, 255, 255, 0.92);
  --text: #14213d;
  --muted: #5c6b73;
  --primary: #0f766e;
  --primary-dark: #115e59;
  --accent: #ef8354;
  --border: rgba(20, 33, 61, 0.12);
  --shadow: 0 20px 60px rgba(20, 33, 61, 0.12);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Space Grotesk", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(239, 131, 84, 0.18), transparent 28%),
    radial-gradient(circle at top right, rgba(15, 118, 110, 0.15), transparent 24%),
    linear-gradient(180deg, #fdfbf7 0%, var(--bg) 52%, var(--bg-accent) 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(20, 33, 61, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 33, 61, 0.03) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.65), transparent 85%);
}

.page-shell {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1rem 0 4rem;
}

.converter-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.converter-card::after {
  content: "";
  position: absolute;
  inset: auto -20% -45% auto;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(239, 131, 84, 0.22), transparent 70%);
  pointer-events: none;
}

.action-row,
.section-heading {
  display: flex;
  gap: 1rem;
}

.secondary-button,
.tool-button,
.utility-button {
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease, color 180ms ease, box-shadow 180ms ease;
}

.secondary-button:hover,
.tool-button:hover,
.utility-button:hover {
  transform: translateY(-1px);
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1;
  font-family: "Fraunces", serif;
}

h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: 1.4rem;
  margin-bottom: 0.75rem;
}

.status-message {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
}

.secondary-button,
.tool-button,
.utility-button {
  min-height: 48px;
  padding: 0.8rem 1.1rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font: inherit;
  cursor: pointer;
}

.secondary-button,
.utility-button,
.tool-button {
  color: var(--text);
  background: var(--surface-strong);
  border-color: var(--border);
}

.danger:hover {
  color: #fff;
  background: #b42318;
  border-color: #b42318;
}

.main-content {
  margin-top: 0.25rem;
}

.converter-card {
  padding: 1.5rem;
}

.section-heading {
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.4rem;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.8rem;
  margin-bottom: 1rem;
}

.tool-button {
  font-weight: 700;
}

.tool-button:focus-visible,
.utility-button:focus-visible,
.secondary-button:focus-visible,
.text-area:focus-visible {
  outline: 3px solid rgba(15, 118, 110, 0.28);
  outline-offset: 2px;
}

.text-area {
  width: 100%;
  min-height: 360px;
  padding: 1.25rem;
  resize: vertical;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--text);
  font: inherit;
  font-size: 1rem;
  line-height: 1.65;
  box-shadow: inset 0 1px 2px rgba(20, 33, 61, 0.05);
}

.action-row {
  justify-content: space-between;
  align-items: center;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.stats,
.utility-actions {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.stat {
  min-width: 108px;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.7);
}

.stat-label {
  display: block;
  margin-bottom: 0.2rem;
  color: var(--muted);
  font-size: 0.84rem;
}

.status-message {
  min-height: 1.8rem;
  margin: 1rem 0 0;
}

.status-message.success {
  color: var(--primary-dark);
}

.status-message.error {
  color: #b42318;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 920px) {
  .section-heading,
  .action-row {
    flex-direction: column;
  }

  .tool-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100% - 1rem, 100%);
    padding-bottom: 2rem;
  }

  .converter-card {
    border-radius: 22px;
  }

  .utility-actions {
    align-items: stretch;
  }

  .secondary-button,
  .utility-button {
    justify-content: center;
  }

  .tool-grid {
    grid-template-columns: 1fr;
  }

  .text-area {
    min-height: 300px;
  }

  .stats {
    width: 100%;
  }

  .stat {
    flex: 1 1 calc(50% - 0.8rem);
  }
}