:root {
  --bg: #f6f4ff;
  --card: #ffffff;
  --ink: #2c2a3a;
  --muted: #8b88a3;
  --brand: #7c6cf0;
  --brand-soft: #ece9fd;
  --accent: #ff9aa2;
  --ok: #46c98b;
  --radius: 18px;
  --shadow: 0 6px 22px rgba(80, 70, 160, 0.10);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
}

.hidden { display: none !important; }

/* ---------- 登录 ---------- */
.login {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 24px;
  background: radial-gradient(120% 80% at 50% 0%, #efeaff 0%, var(--bg) 60%);
}
.login-card {
  width: 100%;
  max-width: 340px;
  background: var(--card);
  border-radius: 24px;
  padding: 36px 28px;
  text-align: center;
  box-shadow: var(--shadow);
}
.login-card .logo { font-size: 48px; }
.login-card h1 { font-size: 20px; margin: 12px 0 4px; }
.login-card .sub { color: var(--muted); margin: 0 0 20px; font-size: 14px; }
#pin {
  width: 100%;
  padding: 14px;
  font-size: 18px;
  text-align: center;
  letter-spacing: 6px;
  border: 2px solid var(--brand-soft);
  border-radius: 14px;
  outline: none;
}
#pin:focus { border-color: var(--brand); }
#loginBtn {
  width: 100%;
  margin-top: 14px;
  padding: 14px;
  font-size: 16px;
  border: none;
  border-radius: 14px;
  background: var(--brand);
  color: #fff;
  font-weight: 600;
}
.err { color: #e05a6b; font-size: 13px; min-height: 18px; margin: 8px 0 0; }

/* ---------- 主框架 ---------- */
.app { max-width: 720px; margin: 0 auto; padding: 0 16px 40px; }
.topbar {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 4px;
  background: var(--bg);
}
.brand { font-weight: 700; font-size: 17px; }

button { cursor: pointer; font-family: inherit; }
.ghost {
  background: transparent; border: none; color: var(--muted);
  font-size: 14px; padding: 6px 10px; border-radius: 10px;
}
.ghost:hover { background: var(--brand-soft); color: var(--brand); }

/* ---------- 工具网格 ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.tool {
  background: var(--card);
  border: none;
  border-radius: var(--radius);
  padding: 18px 16px;
  text-align: left;
  box-shadow: var(--shadow);
  transition: transform .12s ease;
}
.tool:active { transform: scale(0.97); }
.tool .emoji { font-size: 30px; display: block; }
.tool .t-label { font-weight: 700; font-size: 16px; margin-top: 8px; }
.tool .t-desc { color: var(--muted); font-size: 12.5px; margin-top: 4px; }

/* ---------- 生成面板 ---------- */
.panel { background: var(--card); border-radius: var(--radius); padding: 20px 18px; box-shadow: var(--shadow); }
.back { margin-bottom: 6px; margin-left: -6px; }
.panel h2 { font-size: 20px; margin: 4px 0; }
.panel-desc { color: var(--muted); font-size: 14px; margin: 0 0 16px; }
.input-label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; }
#toolInput {
  width: 100%; padding: 12px 14px; font-size: 15px;
  border: 2px solid var(--brand-soft); border-radius: 14px;
  outline: none; resize: vertical; font-family: inherit;
}
#toolInput:focus { border-color: var(--brand); }
.primary {
  width: 100%; margin-top: 14px; padding: 14px;
  font-size: 16px; font-weight: 600; border: none; border-radius: 14px;
  background: var(--brand); color: #fff;
}
.primary:disabled { opacity: .55; }

.output { margin-top: 20px; border-top: 1px dashed var(--brand-soft); padding-top: 16px; }
.out-text {
  white-space: pre-wrap; word-break: break-word;
  font-size: 15.5px; line-height: 1.75;
  background: #faf9ff; border-radius: 14px; padding: 16px;
  min-height: 40px;
}
.out-text .cursor { color: var(--brand); animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.out-actions { display: flex; gap: 8px; margin-top: 12px; }
.out-actions .ghost { background: var(--brand-soft); color: var(--brand); }

.foot { text-align: center; color: var(--muted); font-size: 12px; margin-top: 28px; padding: 0 12px; }