/* ZX 软件激活服务 — 深色主题
   品牌色沿用原桌面软件激活窗口背景 #272D34；
   正文/次级文本对卡片背景对比度 >= 4.5:1；触控目标 >= 44px。 */

:root {
  --bg:        #1C2229;   /* 页面底色 */
  --card:      #272D34;   /* 卡片（原桌面软件主色） */
  --card-2:    #2E353E;   /* 输入控件底色 */
  --border:    #3B434E;
  --fg:        #E9ECEF;   /* 正文 */
  --muted:     #9AA4B0;   /* 次级文本 */
  --accent:    #22C55E;   /* 主按钮/强调（run green） */
  --accent-ink:#0B1B10;
  --danger:    #EF4444;
  --danger-fg: #FCA5A5;
  --radius:    10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB",
               system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a { color: var(--accent); }

h1 { font-size: 1.35rem; margin: 0; }
h2 { font-size: 1.08rem; margin: 0 0 0.75rem; }

/* ---------------------------------------------------------- 布局 */

.wrap { max-width: 640px; margin: 0 auto; padding: 1rem 1rem 0.5rem; }

.centered {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.card-login { width: 100%; max-width: 380px; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.row { display: flex; gap: 1rem; }
.row .field { flex: 1; }

/* ---------------------------------------------------------- 表单 */

label {
  display: block;
  margin: 0.75rem 0 0.25rem;
  font-size: 0.92rem;
  font-weight: 600;
}

input, select, textarea {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card-2);
  color: var(--fg);
  font-size: 1rem;
  font-family: inherit;
}

input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

textarea {
  resize: vertical;
  word-break: break-all;
}

textarea.codebox {
  font-family: ui-monospace, "JetBrains Mono", Consolas, "Courier New", monospace;
  font-size: 0.95rem;
}

.hint {
  color: var(--muted);
  font-size: 0.85rem;
  margin: 0.15rem 0 0.4rem;
}

/* ---------------------------------------------------------- 按钮 */

.btn-primary {
  display: inline-block;
  margin-top: 1rem;
  min-height: 44px;
  padding: 0.7rem 1.4rem;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 1rem;
  font-family: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: filter 0.15s ease;
}

.btn-primary:hover { filter: brightness(1.1); }
.btn-primary:active { filter: brightness(0.95); }

.btn-ghost {
  display: inline-block;
  min-height: 44px;
  padding: 0.5rem 0.85rem;
  border-radius: 8px;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s ease, background 0.15s ease;
}

.btn-ghost:hover { color: var(--fg); background: var(--card); }

/* ---------------------------------------------------------- 提示与结果 */

.alert {
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid var(--danger);
  border-radius: 8px;
  color: var(--danger-fg);
  padding: 0.65rem 0.9rem;
  margin-bottom: 1rem;
}

.muted { color: var(--muted); font-size: 0.92rem; }
.small { font-size: 0.8rem; }

.result .codebox { margin-bottom: 0.75rem; }

footer.small {
  text-align: center;
  color: var(--muted);
  margin: 1.5rem 0;
}

/* ---------------------------------------------------------- 响应式 */

@media (max-width: 480px) {
  .row { flex-direction: column; gap: 0; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}