/* 前台首页：极简短网址风格（支持 data-theme=dark） */
:root {
    --home-accent: #e8486b;
    --home-accent-hover: #d63a5d;
    --home-text: #333;
    --home-muted: #888;
    --home-border: #e0e0e0;
    --home-radius: 0;
    --home-page-bg: #fff;
    --home-grid-line: rgba(0, 0, 0, 0.045);
    --home-fields-bg: #fafafa;
    --home-fields-border: #eee;
    --home-msg-err-bg: #fdecea;
    --home-msg-err-text: #b71c1c;
    --home-msg-err-border: #f5c6cb;
    --home-msg-ok-bg: #e8f5e9;
    --home-msg-ok-text: #1b5e20;
    --home-msg-ok-border: #c8e6c9;
    --home-result-bg: #fff8f9;
    --home-result-border: #fce4ec;
    --home-short-bg: #fff;
    --home-short-border: #f8bbd0;
    --home-reset-bg: #f5f5f5;
    --home-footer-text: #aaa;
    --home-footer-link: #999;
}

html[data-theme='dark'] {
    color-scheme: dark;
    --home-text: #e8eaed;
    --home-muted: #9aa0a6;
    --home-border: #3c4043;
    --home-page-bg: #121212;
    --home-grid-line: rgba(255, 255, 255, 0.07);
    --home-fields-bg: #1e1e1e;
    --home-fields-border: #333;
    --home-msg-err-bg: #3b1a1a;
    --home-msg-err-text: #fca5a5;
    --home-msg-err-border: #7f1d1d;
    --home-msg-ok-bg: #142e18;
    --home-msg-ok-text: #86efac;
    --home-msg-ok-border: #166534;
    --home-result-bg: #1e1a1c;
    --home-result-border: #4a2d35;
    --home-short-bg: #0f0f0f;
    --home-short-border: #5c3d45;
    --home-reset-bg: #2d2d2d;
    --home-footer-text: #888;
    --home-footer-link: #aaa;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body.home-page {
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--home-text);
    background-color: var(--home-page-bg);
    background-image:
        linear-gradient(var(--home-grid-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--home-grid-line) 1px, transparent 1px);
    background-size: 22px 22px;
    background-position: -1px -1px;
    line-height: 1.5;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.home-theme-toggle {
    position: fixed;
    top: 12px;
    right: 12px;
    z-index: 50;
    width: 40px;
    height: 40px;
    padding: 0;
    border: 1px solid var(--home-border);
    border-radius: var(--home-radius);
    background: var(--home-page-bg);
    color: var(--home-text);
    font-size: 18px;
    line-height: 1;
    cursor: pointer;
    box-shadow: none;
}

.home-theme-toggle:hover {
    border-color: var(--home-accent);
    color: var(--home-accent);
}

.home-domain-row {
    margin-bottom: 12px;
    text-align: left;
}

.home-domain-label {
    display: block;
    font-size: 13px;
    color: var(--home-muted);
    margin-bottom: 6px;
}

.home-domain-select {
    width: 100%;
    padding: 10px 12px;
    font-size: 14px;
    font-family: inherit;
    color: var(--home-text);
    background: var(--home-page-bg);
    border: 1px solid var(--home-border);
    border-radius: var(--home-radius);
    outline: none;
}

.home-domain-select:focus {
    border-color: var(--home-accent);
}

.home-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 20px 18px 48px;
    width: 100%;
}

.home-inner {
    width: 100%;
    max-width: 640px;
    text-align: center;
}

.home-brand {
    margin-bottom: 8px;
}

.home-title {
    margin: 0;
    font-size: clamp(1.75rem, 5vw, 2.25rem);
    font-weight: 700;
    color: var(--home-accent);
    letter-spacing: 0.02em;
}

.home-tagline {
    margin: 10px 0 0;
    font-size: 14px;
    color: var(--home-muted);
}

.home-form-wrap {
    margin-top: 22px;
}

.home-form-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: stretch;
}

.home-input {
    flex: 1 1 200px;
    min-width: 0;
    padding: 14px 16px;
    font-size: 15px;
    color: var(--home-text);
    background: var(--home-page-bg);
    border: 1px solid var(--home-border);
    border-radius: var(--home-radius);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.home-input:focus {
    border-color: var(--home-accent);
    box-shadow: 0 0 0 3px rgba(232, 72, 107, 0.15);
}

.home-submit {
    flex: 0 0 auto;
    padding: 14px 28px;
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    background: var(--home-accent);
    border: none;
    border-radius: var(--home-radius);
    cursor: pointer;
    transition: background 0.2s, transform 0.05s;
    font-family: inherit;
}

.home-submit:hover {
    background: var(--home-accent-hover);
}

.home-submit:active {
    transform: translateY(1px);
}

.home-more {
    margin-top: 16px;
    text-align: left;
}

.home-more summary {
    cursor: pointer;
    font-size: 13px;
    color: var(--home-muted);
    list-style: none;
    user-select: none;
}

.home-more summary::-webkit-details-marker {
    display: none;
}

.home-more summary::after {
    content: ' ▾';
    font-size: 11px;
}

.home-more[open] summary::after {
    content: ' ▴';
}

.home-more .home-fields {
    margin-top: 16px;
    padding: 16px;
    background: var(--home-fields-bg);
    border-radius: var(--home-radius);
    border: 1px solid var(--home-fields-border);
}

.home-field {
    margin-bottom: 14px;
}

.home-field:last-child {
    margin-bottom: 0;
}

.home-label {
    display: block;
    font-size: 13px;
    color: #666;
    margin-bottom: 6px;
}

.home-field-input {
    width: 100%;
    padding: 10px 12px;
    font-size: 14px;
    color: var(--home-text);
    background: var(--home-page-bg);
    border: 1px solid var(--home-border);
    border-radius: var(--home-radius);
    font-family: inherit;
}

.home-field-input:focus {
    outline: none;
    border-color: var(--home-accent);
}

.home-row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

@media (max-width: 520px) {
    .home-row-2 {
        grid-template-columns: 1fr;
    }
}

.home-msg {
    margin-top: 12px;
    padding: 12px 14px;
    border-radius: var(--home-radius);
    font-size: 14px;
    text-align: left;
}

.home-msg--err {
    background: var(--home-msg-err-bg);
    color: var(--home-msg-err-text);
    border: 1px solid var(--home-msg-err-border);
}

.home-msg--ok {
    background: var(--home-msg-ok-bg);
    color: var(--home-msg-ok-text);
    border: 1px solid var(--home-msg-ok-border);
}

.home-result {
    margin-top: 18px;
    padding: 18px;
    background: var(--home-result-bg);
    border: 1px solid var(--home-result-border);
    border-radius: var(--home-radius);
    text-align: center;
}

.home-short-url {
    font-size: 16px;
    font-weight: 600;
    color: var(--home-accent);
    word-break: break-all;
    padding: 12px;
    background: var(--home-short-bg);
    border-radius: var(--home-radius);
    border: 1px dashed var(--home-short-border);
    margin-bottom: 16px;
}

.home-qrcode {
    margin: 0 auto;
    display: inline-block;
    padding: 10px;
    background: var(--home-short-bg);
    border-radius: var(--home-radius);
    border: 1px solid var(--home-fields-border);
}

.home-qrcode img {
    display: block;
    max-width: 180px;
    height: auto;
}

.home-result-actions {
    margin-top: 16px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.home-btn-copy {
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    background: #43a047;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-family: inherit;
}

.home-btn-copy:hover {
    background: #388e3c;
}

.home-btn-qr {
    display: inline-block;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    background: #8e24aa;
    border-radius: var(--home-radius);
    text-decoration: none;
}

.home-btn-qr:hover {
    background: #7b1fa2;
    color: #fff;
}

.home-btn-reset {
    margin-top: 10px;
    padding: 8px 20px;
    font-size: 13px;
    color: var(--home-muted);
    background: var(--home-reset-bg);
    border: 1px solid var(--home-border);
    border-radius: var(--home-radius);
    cursor: pointer;
    font-family: inherit;
}

.home-footer {
    padding: 10px 14px;
    text-align: center;
    font-size: 12px;
    color: var(--home-footer-text);
    margin-top: auto;
}

.home-footer a {
    color: var(--home-footer-link);
}