/**
 * qr.css - 二维码工具页专属样式
 * 依赖 common.css。引入顺序：common.css → qr.css
 */

/* ─── Hero ────────────────────────────────────────────────────────────────── */
.qr-hero { padding: 72px 0 32px; background: linear-gradient(180deg, #fff 0%, var(--bg) 100%); text-align: center; }
.qr-hero h1 { font-size: 40px; font-weight: 800; margin-bottom: 16px; }
.qr-hero p { font-size: 17px; color: var(--muted); max-width: 600px; margin: 0 auto; }
.hero-badge { display: inline-flex; align-items: center; gap: 6px; padding: 6px 14px; background: var(--bg-soft); color: var(--primary); border-radius: 999px; font-size: 13px; font-weight: 600; margin-bottom: 20px; }

/* ─── 工具区 ─────────────────────────────────────────────────────────────── */
.qr-tool { max-width: var(--site-max-width, 1200px); margin: 0 auto; padding: 24px var(--site-side-pad, 24px); display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: start; }
.tool-left { display: flex; flex-direction: column; gap: 24px; }
.tool-card { background: #fff; border-radius: var(--radius-lg); box-shadow: var(--shadow); padding: 28px; }
.tool-preview { position: sticky; top: 24px; }
.tool-title { font-size: 18px; font-weight: 700; margin-bottom: 20px; display: flex; align-items: center; gap: 8px; }
.tool-title svg { width: 20px; height: 20px; color: var(--primary); }
.size-row { display: flex; align-items: center; gap: 12px; }
.size-row input[type=range] { flex: 1; accent-color: var(--primary); }
.size-val { font-weight: 700; color: var(--primary); min-width: 70px; text-align: right; }
/* 本页主操作按钮 */
.qr-tool .btn { padding: 12px 20px; border: none; border-radius: 10px; font-size: 14px; font-weight: 600; cursor: pointer; transition: all .2s; display: inline-flex; align-items: center; gap: 8px; }
.qr-tool .btn-primary { background: var(--gradient); color: #fff; width: 100%; justify-content: center; }
.qr-tool .btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(79,70,229,.3); }
.qr-tool .btn-outline { background: #fff; border: 1.5px solid var(--border); color: var(--text); }
.qr-tool .btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.qr-tool .btn-sm { padding: 6px 12px; font-size: 12px; border-radius: 8px; }
.btn-row { display: flex; gap: 10px; margin-top: 14px; }

/* ─── 样式自定义控件 ──────────────────────────────────────────────────────── */
.style-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.style-item { display: flex; flex-direction: column; gap: 6px; }
.form-label { font-size: 13px; font-weight: 600; color: var(--text); }
.form-select { width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 13px; background: #fff; color: var(--text); cursor: pointer; }
.form-select:focus { outline: none; border-color: var(--primary); }
.style-item input[type=range] { width: 100%; accent-color: var(--primary); }

.color-row { display: flex; align-items: center; gap: 8px; }
.color-row input[type=color] { width: 40px; height: 32px; border: 1px solid var(--border); border-radius: 8px; cursor: pointer; padding: 2px; background: #fff; }
.color-val { font-size: 12px; color: var(--muted); font-family: monospace; }
.color-row input[type=checkbox] { accent-color: var(--primary); width: 16px; height: 16px; }

.logo-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

/* 主题预设 */
.preset-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 8px; padding-top: 16px; border-top: 1px solid var(--border-light); }
.preset-label { font-size: 13px; color: var(--muted); font-weight: 600; }
.preset-chip { padding: 5px 12px; border: 1px solid var(--border); border-radius: 999px; background: #fff; font-size: 12px; cursor: pointer; transition: all .15s; color: var(--text); }
.preset-chip:hover { border-color: var(--primary); color: var(--primary); }

/* 文字设置 */
.text-block { margin-top: 4px; padding: 14px 0; border-top: 1px solid var(--border-light); }
.text-toggle-row { display: flex; align-items: center; gap: 10px; }
.text-toggle-label { font-size: 14px; font-weight: 600; color: var(--text); }
.switch { position: relative; display: inline-block; width: 42px; height: 24px; }
.switch input { opacity: 0; width: 0; height: 0; }
.switch-slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background: #cbd5e1; border-radius: 24px; transition: .2s; }
.switch-slider:before { content: ""; position: absolute; height: 18px; width: 18px; left: 3px; bottom: 3px; background: #fff; border-radius: 50%; transition: .2s; }
.switch input:checked + .switch-slider { background: var(--primary); }
.switch input:checked + .switch-slider:before { transform: translateX(18px); }
.form-input { width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 13px; }
.form-input:focus { outline: none; border-color: var(--primary); }

/* 快捷字号按钮 */
.quick-size-row { display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap; }
.quick-size-btn { flex: 1; min-width: 36px; padding: 5px 0; border: 1px solid var(--border); border-radius: 6px; background: #fff; font-size: 12px; font-weight: 600; color: var(--text); cursor: pointer; transition: all .15s; }
.quick-size-btn:hover { border-color: var(--primary); color: var(--primary); background: var(--bg-soft); }

/* ─── 预览区 ──────────────────────────────────────────────────────────────── */
.preview-wrap { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 400px; }
.preview-empty { color: var(--muted); text-align: center; padding: 40px; }
.preview-empty svg { width: 56px; height: 56px; color: var(--border); margin-bottom: 12px; }
.qr-canvas { max-width: 100%; border-radius: var(--radius); box-shadow: var(--shadow); display: none; border: 1px solid var(--border-light); }
.qr-canvas.show { display: block; }
.preview-info { margin-top: 14px; font-size: 13px; color: var(--muted); text-align: center; }

/* ─── 步骤区 ─────────────────────────────────────────────────────────────── */
.steps-sec { max-width: var(--site-max-width, 1200px); margin: 24px auto 64px; padding: 0 var(--site-side-pad, 24px); }
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.step-card { background: #fff; border-radius: var(--radius-lg); padding: 24px; box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); }
.step-num { width: 36px; height: 36px; background: var(--bg-soft); color: var(--primary); border-radius: 10px; display: flex; align-items: center; justify-content: center; font-weight: 700; margin-bottom: 14px; }
.step-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.step-card p { font-size: 14px; color: var(--text-light); }

/* ─── 响应式 ───────────────────────────────────────────────────────────────── */
@media (max-width: 820px) {
  .qr-tool { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .tool-preview { position: static; }
  .style-row { grid-template-columns: 1fr; }
}