* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: #0f172a;
  color: #e5e7eb;
}

/* 🔹 INTRO SECTION */
.intro {
  min-height: 100vh;
  padding: 40px 20px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.intro h1 {
  font-size: 36px;
  margin-bottom: 10px;
}

.intro p {
  max-width: 600px;
  color: #94a3b8;
  font-size: 16px;
}

.features {
  list-style: none;
  padding: 0;
  margin: 20px 0;
  color: #cbd5f5;
}

.features li {
  margin: 6px 0;
}

.start-btn {
  margin-top: 20px;
  padding: 12px 28px;
  font-size: 16px;
  border-radius: 10px;
  border: none;
  background: #22d3ee;
  color: #020617;
  cursor: pointer;
}

.start-btn:hover {
  background: #38bdf8;
}

/* 🔹 TOOL SECTION */
.tool {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

.hidden {
  display: none;
}

/* 🔹 TOOL CARD */
.app {
  width: 100%;
  max-width: 700px;
  background: #020617;
  padding: 24px;
  border-radius: 12px;
  box-shadow: 0 0 30px rgba(0,0,0,0.6);
}

.app h2 {
  text-align: center;
  margin-bottom: 4px;
}

.subtitle {
  text-align: center;
  color: #94a3b8;
  font-size: 14px;
}

textarea {
  width: 100%;
  height: 200px;
  margin-top: 16px;
  padding: 14px;
  background: #020617;
  color: #e5e7eb;
  border: 1px solid #334155;
  border-radius: 10px;
  font-size: 15px;
  resize: vertical;
}

textarea:focus {
  outline: none;
  border-color: #22d3ee;
}

.buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-top: 16px;
}

button {
  padding: 10px;
  border-radius: 8px;
  border: 1px solid #22d3ee;
  background: transparent;
  color: #22d3ee;
  cursor: pointer;
  font-size: 14px;
}

button:hover {
  background: #22d3ee;
  color: #020617;
}

.copy {
  border-color: #22c55e;
  color: #22c55e;
}

.copy:hover {
  background: #22c55e;
  color: #020617;
}

#status {
  margin-top: 12px;
  text-align: center;
  font-size: 14px;
  color: #94a3b8;
}