:root {
  --bg: #dce8ff;
  --bg-accent: #f4d98f;
  --card: rgba(245, 249, 255, 0.72);
  --text: #17233f;
  --muted: #4f5f7d;
  --line: rgba(39, 77, 130, 0.2);
  --primary: #425dff;
  --primary-dark: #0f8a9d;
  --secondary: rgba(236, 244, 255, 0.72);
  --secondary-text: #20345d;
  --shadow: 0 28px 60px rgba(37, 74, 119, 0.22);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Space Grotesk", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 18%, rgba(43, 98, 212, 0.88), transparent 24%),
    radial-gradient(circle at 84% 16%, rgba(221, 72, 78, 0.82), transparent 23%),
    radial-gradient(circle at 50% 32%, rgba(34, 154, 162, 0.72), transparent 22%),
    radial-gradient(circle at 26% 82%, rgba(238, 205, 73, 0.78), transparent 24%),
    radial-gradient(circle at 82% 74%, rgba(222, 128, 44, 0.76), transparent 22%),
    linear-gradient(145deg, #244e9f 0%, #156b8a 34%, #2a9e8f 60%, #b8583b 82%, #d6b54b 100%);
  background-attachment: fixed;
}

.app-shell {
  width: min(1100px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2.5rem 0 4rem;
}

.hero {
  max-width: 680px;
  margin-bottom: 2rem;
  padding: 1.75rem 1.75rem 0;
  position: relative;
}

.hero::after {
  content: "🌈 ✨ 😎 🎉";
  display: inline-flex;
  gap: 0.55rem;
  margin-top: 1rem;
  font-size: 1.4rem;
}

.ad-slot {
  margin: 0 0 2rem;
}

.ad-label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--muted);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.ad-box {
  display: grid;
  place-items: center;
  gap: 0.35rem;
  min-height: 96px;
  border: 1px dashed rgba(70, 102, 136, 0.35);
  border-radius: 16px;
  background: rgba(239, 246, 255, 0.56);
  color: var(--muted);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.95rem;
  text-align: center;
  padding: 1rem;
}

.ad-box strong {
  color: var(--text);
  font-size: 1rem;
}

.ad-box span {
  font-size: 0.88rem;
}

.ad-slot-inline {
  margin-top: 1rem;
}

.ad-slot-inline .ad-box {
  min-height: 180px;
}

.ad-slot-banner .ad-box,
.ad-slot-footer .ad-box {
  min-height: 110px;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: #ffffff;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.86rem;
  font-weight: 700;
  text-shadow: 0 8px 22px rgba(23, 57, 108, 0.22);
}

h1 {
  margin: 0;
  font-size: clamp(3.6rem, 9vw, 6.4rem);
  line-height: 0.92;
  color: #ffffff;
  text-shadow: 0 16px 34px rgba(20, 52, 93, 0.2);
}

.intro {
  margin: 1rem 0 0;
  max-width: 44ch;
  color: rgba(255, 255, 255, 0.96);
  font-size: 1.28rem;
  line-height: 1.55;
}

.converter-card {
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 28px;
  box-shadow: var(--shadow);
  padding: 1.75rem;
  backdrop-filter: blur(18px);
}

.field-label,
.stat-label,
.status {
  font-family: "IBM Plex Mono", monospace;
}

.field-label {
  display: inline-block;
  margin-bottom: 0.75rem;
  color: var(--muted);
  font-size: 1rem;
}

textarea {
  width: 100%;
  min-height: 260px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(247, 251, 255, 0.8);
  padding: 1rem 1.1rem;
  color: var(--text);
  font: inherit;
  font-size: 1.14rem;
  line-height: 1.7;
  outline: none;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

textarea:focus {
  border-color: rgba(15, 138, 157, 0.45);
  box-shadow: 0 0 0 4px rgba(15, 138, 157, 0.14);
}

.toolbar,
.utility-row,
.stats {
  gap: 0.75rem;
}

.toolbar {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 1rem;
}

.toolbar button {
  width: 100%;
  text-align: center;
}

.utility-row,
.stats {
  display: grid;
}

.utility-row {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 0.75rem;
}

button {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 1rem 1.1rem;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.2;
  letter-spacing: 0;
  color: #ffffff;
  background: linear-gradient(135deg, #2463ce 0%, #1f9b8f 45%, #db8430 100%);
  box-shadow: 0 16px 28px rgba(30, 82, 132, 0.26);
  transition: transform 160ms ease, box-shadow 160ms ease, opacity 160ms ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 32px rgba(30, 82, 132, 0.3);
}

button:active {
  transform: translateY(0);
}

button.secondary {
  background: var(--secondary);
  color: var(--secondary-text);
  border: 1px solid rgba(15, 138, 157, 0.12);
  box-shadow: none;
}

button.secondary:hover {
  background: rgba(244, 249, 255, 0.88);
  box-shadow: none;
}

.stats {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 1rem;
}

.stat {
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 0.9rem 1rem;
  background: rgba(237, 245, 255, 0.62);
}

.stat strong {
  display: block;
  margin-top: 0.35rem;
  font-size: 2rem;
}

.status {
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 720px) {
  .app-shell {
    width: min(100% - 1rem, 100%);
    padding-top: 1.25rem;
  }

  .hero {
    padding: 1rem 0.5rem 0;
  }

  .converter-card {
    padding: 1rem;
    border-radius: 18px;
  }

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

  .ad-box {
    min-height: 110px;
    padding: 1rem;
  }
}