/* ============ 二维码生成器 ============ */
:root {
    --qg-paper: #f4ecd8;
    --qg-paper-2: #ebe0c6;
    --qg-paper-3: #d9c9a3;
    --qg-card: #fffaef;
    --qg-card-line: #c8b88a;
    --qg-ink: #1a1410;
    --qg-ink-2: #3a3024;
    --qg-ink-3: #6b5d44;
    --qg-vermilion: #b91c1c;
    --qg-jade: #0c4da2;
    --qg-gold: #b8860b;
    --qg-shadow: 0 1px 0 rgba(58,48,36,.18), 0 6px 18px rgba(58,48,36,.10);
}

* { box-sizing: border-box; }

html, body {
    margin: 0; padding: 0;
    min-height: 100vh;
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--qg-ink);
    -webkit-tap-highlight-color: transparent;
}

.qg-fullscreen {
    min-height: 100vh; min-height: 100dvh;
    display: flex; flex-direction: column;
    background: var(--qg-paper);
    background-image:
      radial-gradient(circle at 20% 10%, rgba(184,134,11,.06) 0, transparent 40%),
      radial-gradient(circle at 80% 80%, rgba(185,28,28,.04) 0, transparent 40%);
}

/* ============ 顶栏 ============ */
.qg-header {
    flex: 0 0 auto;
    display: flex; align-items: center; justify-content: space-between;
    padding: 10px 14px;
    border-bottom: 1px solid rgba(58,48,36,.18);
    background: rgba(244,236,216,.72);
    backdrop-filter: blur(8px);
    position: sticky; top: 0; z-index: 10;
}
.qg-back {
    display: inline-flex; align-items: center; gap: 6px;
    color: var(--qg-ink-2); text-decoration: none;
    padding: 6px 10px; border-radius: 8px;
    font-size: 15px;
    transition: background .15s;
}
.qg-back:hover { background: rgba(58,48,36,.08); }
.qg-back i { font-size: 18px; }
.qg-title {
    font-size: 18px; font-weight: 700; letter-spacing: 4px;
    color: var(--qg-ink);
}
.qg-spacer { width: 60px; }

/* ============ 主体卡片 ============ */
.qg-main {
    flex: 1 1 auto;
    padding: 18px 14px 32px;
    display: flex; justify-content: center;
}
.qg-card {
    width: 100%;
    max-width: 720px;
    background: var(--qg-card);
    border: 1px solid var(--qg-card-line);
    border-radius: 16px;
    box-shadow: var(--qg-shadow);
    padding: 18px 18px 22px;
}

/* ============ Tab 切换 ============ */
.qg-tabs {
    display: flex; gap: 6px;
    background: rgba(58,48,36,.06);
    border-radius: 12px;
    padding: 4px;
    margin-bottom: 16px;
}
.qg-tab {
    flex: 1; min-height: 40px;
    background: transparent;
    border: none; border-radius: 9px;
    color: var(--qg-ink-2);
    font-size: 15px; font-weight: 600;
    cursor: pointer;
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    transition: background .15s, color .15s;
}
.qg-tab.active {
    background: var(--qg-card);
    color: var(--qg-vermilion);
    box-shadow: 0 1px 3px rgba(58,48,36,.15);
}
.qg-tab i { font-size: 17px; }

/* ============ 输入区 ============ */
.qg-input-pane {
    margin-bottom: 18px;
    animation: qg-fade .2s ease;
}
.qg-input-pane.hidden { display: none; }
@keyframes qg-fade { from { opacity: 0; transform: translateY(2px); } to { opacity: 1; } }

.qg-label {
    display: block;
    font-size: 13px; font-weight: 600;
    color: var(--qg-ink-2);
    margin: 10px 0 6px;
}
.qg-label:first-child { margin-top: 0; }

.qg-input,
.qg-textarea {
    width: 100%;
    border: 1px solid var(--qg-card-line);
    background: #fff;
    border-radius: 9px;
    padding: 10px 12px;
    font-size: 15px;
    color: var(--qg-ink);
    font-family: inherit;
    transition: border-color .15s, box-shadow .15s;
    resize: vertical;
}
.qg-input:focus,
.qg-textarea:focus {
    outline: none;
    border-color: var(--qg-vermilion);
    box-shadow: 0 0 0 3px rgba(185,28,28,.12);
}
.qg-textarea { min-height: 70px; line-height: 1.5; }

.qg-hint {
    font-size: 12px;
    color: var(--qg-ink-3);
    margin-top: 6px;
}

.qg-check {
    display: inline-flex; align-items: center; gap: 6px;
    margin-top: 10px;
    font-size: 13px; color: var(--qg-ink-2);
    cursor: pointer;
}
.qg-check input { margin: 0; }

/* ============ Segment 切换条（加密类型 / 纠错级别） ============ */
.qg-segment {
    display: flex; gap: 4px;
    background: rgba(58,48,36,.06);
    border-radius: 9px;
    padding: 3px;
}
.qg-seg-btn {
    flex: 1; min-height: 34px;
    background: transparent;
    border: none; border-radius: 7px;
    color: var(--qg-ink-2);
    font-size: 13px; font-weight: 600;
    cursor: pointer;
    transition: background .15s, color .15s;
}
.qg-seg-btn.active {
    background: #fff;
    color: var(--qg-ink);
    box-shadow: 0 1px 2px rgba(58,48,36,.12);
}

/* ============ 选项区 ============ */
.qg-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px 14px;
    padding: 14px 0 4px;
    margin-top: 4px;
    border-top: 1px dashed rgba(58,48,36,.18);
}
.qg-option-wide { grid-column: 1 / -1; }

.qg-color-row {
    display: flex; align-items: center; gap: 10px;
}
.qg-color {
    width: 44px; height: 32px;
    border: 1px solid var(--qg-card-line);
    border-radius: 8px;
    background: #fff;
    cursor: pointer;
    padding: 2px;
}
.qg-hex {
    font-family: "SFMono-Regular", "Menlo", "Consolas", monospace;
    font-size: 13px;
    color: var(--qg-ink-3);
}

.qg-range {
    width: 100%;
    -webkit-appearance: none;
    appearance: none;
    background: transparent;
    height: 22px;
    cursor: pointer;
}
.qg-range::-webkit-slider-runnable-track {
    height: 4px; background: var(--qg-card-line);
    border-radius: 2px;
}
.qg-range::-webkit-slider-thumb {
    -webkit-appearance: none; appearance: none;
    width: 18px; height: 18px;
    background: var(--qg-vermilion);
    border-radius: 50%;
    margin-top: -7px;
    cursor: pointer;
    box-shadow: 0 1px 3px rgba(58,48,36,.3);
}
.qg-range::-moz-range-track { height: 4px; background: var(--qg-card-line); border-radius: 2px; }
.qg-range::-moz-range-thumb {
    width: 18px; height: 18px;
    background: var(--qg-vermilion);
    border: none; border-radius: 50%;
    cursor: pointer;
}

/* ============ 预览 ============ */
.qg-preview-wrap {
    margin: 18px 0 14px;
    padding: 16px;
    background: #fff;
    border: 1px solid var(--qg-card-line);
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    min-height: 280px;
    position: relative;
}
.qg-preview-canvas {
    max-width: 100%;
    width: auto; height: auto;
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
    display: block;
}
.qg-preview-empty {
    color: var(--qg-ink-3);
    text-align: center;
}
.qg-preview-empty.hidden { display: none; }
.qg-preview-empty i {
    display: block; font-size: 56px;
    margin-bottom: 8px;
    opacity: .35;
}

/* ============ 操作按钮 ============ */
.qg-actions {
    display: flex; gap: 10px;
    margin-bottom: 14px;
}
.qg-btn {
    flex: 1; min-height: 44px;
    background: #fff;
    border: 1px solid var(--qg-card-line);
    border-radius: 10px;
    color: var(--qg-ink);
    font-size: 15px; font-weight: 600;
    cursor: pointer;
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    transition: background .15s, transform .08s;
}
.qg-btn:hover { background: var(--qg-paper-2); }
.qg-btn:active { transform: translateY(1px); }
.qg-btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.qg-btn.primary {
    background: var(--qg-vermilion);
    border-color: var(--qg-vermilion-d);
    color: #fff;
}
.qg-btn.primary:hover { background: #a01717; }
.qg-btn i { font-size: 17px; }

/* ============ 底部说明 ============ */
.qg-foot {
    border-top: 1px dashed rgba(58,48,36,.18);
    padding-top: 12px;
    color: var(--qg-ink-3);
    font-size: 12px;
    line-height: 1.7;
}
.qg-foot div { display: flex; align-items: center; gap: 6px; }
.qg-foot i { font-size: 14px; color: var(--qg-jade); }

/* ============ Toast ============ */
.qg-toast {
    position: fixed; left: 50%; bottom: 32px;
    transform: translate(-50%, 20px);
    padding: 10px 18px;
    background: var(--qg-ink);
    color: #fffaef;
    border-radius: 10px;
    font-size: 14px;
    box-shadow: 0 6px 20px rgba(0,0,0,.25);
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s, transform .2s;
    z-index: 100;
}
.qg-toast.show {
    opacity: 1;
    transform: translate(-50%, 0);
}

/* ============ 移动端 ============ */
@media (max-width: 520px) {
    .qg-card { padding: 14px 12px 18px; border-radius: 12px; }
    .qg-options { grid-template-columns: 1fr; gap: 10px; }
    .qg-tab { font-size: 14px; }
    .qg-preview-wrap { padding: 10px; min-height: 240px; }
    .qg-actions { flex-direction: column; }
    .qg-actions .qg-btn { flex: 0 0 auto; }
}

:root {
    --qg-vermilion-d: #8a1414;
}