@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;600&family=Syne:wght@400;700&display=swap');

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

:root {
  --bg:        #0d0d0f;
  --surface:   #14141a;
  --surface2:  #1c1c24;
  --border:    #2a2a38;
  --accent:    #4f8ef7;
  --text:      #ddddf0;
  --text-muted:#5c5c78;
  --success:   #3ecf8e;
  --error:     #f76f6f;
  --mono:      'JetBrains Mono', monospace;
  --sans:      'Syne', sans-serif;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.container {
  width: 100%;
  max-width: 660px;
}

header {
  margin-bottom: 2rem;
}

header h1 {
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

header h1 span {
  color: var(--accent);
}

.subtitle {
  margin-top: 0.35rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
}

.card-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.key-box {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  line-height: 1.7;
  color: var(--text);
  word-break: break-all;
  min-height: 90px;
  transition: border-color 0.2s, color 0.2s;
}

.key-box.placeholder {
  color: var(--text-muted);
  display: flex;
  align-items: center;
}

.key-box.error-state {
  color: var(--error);
  border-color: rgba(247, 111, 111, 0.3);
}

.actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.btn {
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 700;
  border: none;
  border-radius: 6px;
  padding: 0.6rem 1.4rem;
  cursor: pointer;
  transition: opacity 0.15s, background 0.15s, transform 0.1s;
}

.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:not(:disabled):hover { opacity: 0.85; }

.btn-copy {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-copy:not(:disabled):hover { border-color: var(--accent); color: var(--accent); }
.btn-copy.copied { color: var(--success); border-color: var(--success); }

.status {
  margin-top: 0.75rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  min-height: 1rem;
  color: var(--text-muted);
}
.status.success { color: var(--success); }
.status.error   { color: var(--error); }

footer {
  margin-top: 1.5rem;
  text-align: center;
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--text-muted);
}