/* ==========================================================================
   USDT 支付平台 · 前端样式（TASK 10，手写、无第三方依赖）
   目标：简洁、专业、可信、加载快；PC 与移动端均可用，不产生横向溢出。
   ========================================================================== */

:root {
    --color-bg: #f5f6f8;
    --color-surface: #ffffff;
    --color-border: #e2e5ea;
    --color-border-strong: #cdd3dc;
    --color-text: #1f2430;
    --color-text-muted: #6b7280;
    --color-primary: #1f6feb;
    --color-primary-dark: #1a5fd0;
    --color-success: #1a7f4b;
    --color-warning: #a45c00;
    --color-danger: #b3261e;
    --color-info: #1f6feb;
    --radius: 8px;
    --radius-sm: 6px;
    --shadow: 0 1px 2px rgba(16, 24, 40, 0.06), 0 1px 3px rgba(16, 24, 40, 0.08);
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 1.55;
    -webkit-text-size-adjust: 100%;
}

/* 控制台页面（商户 / 平台）统一继承 base body 样式 */
.app-body { min-height: 100vh; }

a {
    color: var(--color-primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.mono, code, pre, kbd {
    font-family: var(--font-mono);
}

code.mono, .mono {
    font-size: 0.92em;
    word-break: break-all;
}

.muted {
    color: var(--color-text-muted);
}

.small {
    font-size: 12px;
}

.strong {
    font-weight: 600;
}

.right {
    text-align: right;
}

.address {
    display: inline-block;
    max-width: 100%;
    overflow-wrap: anywhere;
}

/* ---------- 通用组件 ---------- */

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 16px 18px;
    margin-bottom: 16px;
}

.card-highlight {
    border-color: #f0c36d;
    background: #fffcf3;
}

.card-title {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 12px;
}

.sub-title {
    font-size: 13px;
    font-weight: 600;
    margin: 16px 0 8px;
}

.alert {
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    margin-bottom: 14px;
    border: 1px solid transparent;
    font-size: 13px;
}

.alert-list {
    margin: 6px 0 0;
    padding-left: 18px;
}

.alert-info {
    background: #eef4ff;
    border-color: #c6d8fb;
    color: #1b3a6b;
}

.alert-success {
    background: #e9f7ef;
    border-color: #bfe6d0;
    color: #14532d;
}

.alert-warning {
    background: #fff8e6;
    border-color: #f3d68a;
    color: #6b4700;
}

.alert-danger {
    background: #fdeceb;
    border-color: #f3c6c2;
    color: #7f1d1a;
}

.tag {
    display: inline-block;
    padding: 1px 8px;
    border-radius: 999px;
    font-size: 12px;
    line-height: 1.6;
    border: 1px solid var(--color-border-strong);
    background: #f3f4f6;
    color: #374151;
    white-space: nowrap;
}

.tag-info { background: #e8f0fe; border-color: #bcd0f7; color: #1b4fa8; }
.tag-success { background: #e6f6ec; border-color: #b6e0c6; color: #14653a; }
.tag-warning { background: #fdf3e3; border-color: #f0d19a; color: #8a5200; }
.tag-danger { background: #fdeceb; border-color: #f0c1bd; color: #9b1c14; }
.tag-neutral { background: #f3f4f6; border-color: #d5d9e0; color: #4b5563; }

.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 8px;
}

.kv {
    margin: 0;
    display: grid;
    gap: 6px;
}

.kv-row {
    display: grid;
    grid-template-columns: 190px 1fr;
    gap: 10px;
    padding: 4px 0;
    border-bottom: 1px dashed var(--color-border);
}

.kv-row:last-child {
    border-bottom: 0;
}

.kv-row dt {
    color: var(--color-text-muted);
    font-size: 13px;
}

.kv-row dd {
    margin: 0;
    overflow-wrap: anywhere;
}

.btn {
    display: inline-block;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    font-size: 13px;
    line-height: 1.2;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    background: #eceff3;
    color: var(--color-text);
    transition: background 0.12s ease;
}

.btn:hover { text-decoration: none; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); }

.btn-secondary { background: #eef1f5; border-color: var(--color-border-strong); color: #26303f; }
.btn-secondary:hover { background: #e3e8ef; }

.btn-danger { background: var(--color-danger); color: #fff; }
.btn-danger:hover { background: #971d17; }

.btn-ghost { background: transparent; border-color: var(--color-border-strong); color: #26303f; }
.btn-ghost:hover { background: #eef1f5; }

.btn-sm { padding: 5px 10px; font-size: 12px; }

.btn-block { display: block; width: 100%; }

/* ---------- 表单 ---------- */

.form { margin: 0; }

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
}

.form-inline {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: flex-end;
}

.form-row {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 10px;
}

.form-grow { flex: 1 1 220px; }

.form-label {
    font-size: 12px;
    color: var(--color-text-muted);
}

.form-input {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-sm);
    background: #fff;
    font-size: 13px;
    font-family: inherit;
    color: var(--color-text);
}

.form-input:focus {
    outline: 2px solid #cfe0ff;
    border-color: var(--color-primary);
}

.form-check { flex-direction: row; align-items: center; gap: 10px; }

.form-error {
    color: var(--color-danger);
    font-size: 12px;
    margin-top: 2px;
}

.checkbox {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
}

.checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: 6px 12px;
}

/* ---------- 表格 ---------- */

.table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    min-width: 640px;
}

.table th, .table td {
    padding: 9px 10px;
    border-bottom: 1px solid var(--color-border);
    text-align: left;
    vertical-align: top;
}

.table th {
    color: var(--color-text-muted);
    font-weight: 600;
    font-size: 12px;
    background: #fafbfc;
    white-space: nowrap;
}

.table tbody tr:hover { background: #fafbfd; }

.actions {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: flex-end;
}

.actions form { display: inline; }

.pager {
    display: flex;
    align-items: center;
    gap: 12px;
    justify-content: center;
    margin-top: 14px;
    flex-wrap: wrap;
}

.pager-link {
    padding: 5px 12px;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-sm);
    background: #fff;
    font-size: 13px;
}

.pager-link.is-disabled { color: #a5acb8; background: #f6f7f9; }

.pager-info { color: var(--color-text-muted); font-size: 12px; }

/* ---------- 统计卡 ---------- */

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    margin-bottom: 16px;
}

.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 14px 16px;
}

.stat-label { color: var(--color-text-muted); font-size: 12px; margin-bottom: 6px; }
.stat-value { font-size: 22px; font-weight: 600; color: #101828; }
.stat-unit { color: var(--color-text-muted); font-size: 12px; }

/* ---------- 一次性密钥展示 ---------- */

.secret-once {
    border: 1px dashed var(--color-border-strong);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    background: #fff;
    margin-top: 8px;
}

.secret-onceLabel { font-size: 12px; color: var(--color-text-muted); margin-bottom: 4px; }

.secret-onceValue {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    justify-content: space-between;
}

/* ---------- 文档 ---------- */

.anchor-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 14px;
}

.anchor-nav a {
    padding: 4px 10px;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    background: #fff;
    font-size: 12px;
    text-decoration: none;
}

.doc-list {
    margin: 0 0 8px;
    padding-left: 20px;
    font-size: 13px;
}

.doc-list li { margin-bottom: 4px; }

.code-sample, .code-block pre {
    background: #0f172a;
    color: #e6edf7;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    font-size: 12px;
    line-height: 1.6;
    margin: 8px 0;
    white-space: pre;
}

.code-block {
    position: relative;
    margin: 8px 0;
}

.code-block pre { margin: 0 0 8px; }

details summary {
    cursor: pointer;
    font-weight: 600;
    padding: 6px 0;
}

/* ---------- 控制台布局 ---------- */

.app-topbar {
    position: sticky;
    top: 0;
    z-index: 30;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    background: #101828;
    color: #fff;
}

.app-navToggle {
    display: none;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: 16px;
    line-height: 1;
    padding: 5px 9px;
    cursor: pointer;
}

.app-brand { display: flex; align-items: baseline; gap: 8px; }

.app-brandMark {
    display: inline-block;
    background: #1f6feb;
    color: #fff;
    font-weight: 700;
    font-size: 13px;
    padding: 2px 8px;
    border-radius: 4px;
    letter-spacing: 0.5px;
}

.app-brandText { color: #cfd6e4; font-size: 13px; }

.app-topbarSpacer { flex: 1 1 auto; }

.app-topbarMeta {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
}

.app-switch { display: flex; gap: 10px; align-items: center; }

.app-switchField {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: #cfd6e4;
}

.app-switchField select {
    background: #1b2333;
    color: #fff;
    border: 1px solid #333d52;
    border-radius: 4px;
    padding: 4px 6px;
    font-size: 12px;
}

.app-account { text-align: right; line-height: 1.3; }
.app-accountName { font-size: 13px; }
.app-accountRole { font-size: 11px; color: #9aa5b8; }

.app-shell { display: flex; align-items: stretch; min-height: calc(100vh - 52px); }

.app-sidebar {
    width: 200px;
    flex: 0 0 200px;
    background: #fff;
    border-right: 1px solid var(--color-border);
    padding: 12px 8px;
}

.app-nav { display: flex; flex-direction: column; gap: 2px; }

.app-navLink {
    display: block;
    padding: 9px 12px;
    border-radius: var(--radius-sm);
    color: #2b3546;
    font-size: 13px;
    text-decoration: none;
}

.app-navLink:hover { background: #f1f4f8; text-decoration: none; }

.app-navLink.is-active {
    background: #e8f0fe;
    color: #1b4fa8;
    font-weight: 600;
}

.admin-navGroup {
    padding: 12px 12px 4px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.4px;
    text-transform: uppercase;
    color: #9aa5b8;
}

.admin-navGroup:first-child { padding-top: 2px; }

.admin-navGroup.is-active { color: #1b4fa8; }

.app-main {
    flex: 1 1 auto;
    min-width: 0;
    padding: 18px 20px 40px;
}

.page-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 14px;
}

.page-title { font-size: 20px; margin: 0 0 4px; }
.page-sub { margin: 0; color: var(--color-text-muted); font-size: 13px; }

.admin-metricGrid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 14px;
    align-items: start;
}

.admin-metricCard { margin: 0; }

/* ---------- 访客页（登录 / 注册） ---------- */

.guest-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 24px 16px;
}

.guest-card {
    width: 100%;
    max-width: 420px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px 22px;
}

.guest-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 18px;
}

.guest-brandText { font-size: 14px; color: var(--color-text-muted); }

.guest-footer {
    margin-top: 16px;
    font-size: 13px;
    color: var(--color-text-muted);
    text-align: center;
}

.guest-foot { margin-top: 14px; text-align: center; }

.guest-title { font-size: 19px; margin: 0 0 6px; }

.guest-subtitle { margin: 0 0 16px; color: var(--color-text-muted); font-size: 13px; }

/* ---------- 收银台 ---------- */

.checkout-body { background: #eef1f5; }

.checkout-shell {
    max-width: 560px;
    margin: 0 auto;
    padding: 20px 14px 40px;
}

.checkout-head {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
}

.checkout-brand { display: flex; align-items: center; gap: 8px; }
.checkout-brandText { font-size: 12px; color: var(--color-text-muted); }

.checkout-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px 18px;
}

.checkout-card-error { text-align: center; }

.checkout-merchant { text-align: center; margin-bottom: 14px; }
.checkout-merchantName { font-size: 17px; font-weight: 600; }
.checkout-orderNo { font-size: 12px; color: var(--color-text-muted); }

.checkout-status { text-align: center; margin-bottom: 16px; }
.checkout-hint { font-size: 13px; color: var(--color-text-muted); margin: 8px 0 0; }

.checkout-amount {
    text-align: center;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 16px 12px;
    background: #fbfcfe;
    margin-bottom: 16px;
}

.checkout-amountLabel { color: var(--color-text-muted); font-size: 12px; }

.checkout-amountValue {
    font-size: 26px;
    font-weight: 700;
    word-break: break-all;
    margin: 6px 0 8px;
}

.checkout-amountUnit { font-size: 14px; font-weight: 600; color: var(--color-text-muted); margin-left: 4px; }

.checkout-address {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 12px;
    margin-bottom: 16px;
    word-break: break-all;
}

.checkout-addressLabel { font-size: 12px; color: var(--color-text-muted); margin-bottom: 6px; }
.checkout-address code { display: block; margin-bottom: 8px; font-size: 13px; }

.checkout-qr {
    display: flex;
    justify-content: center;
    margin-bottom: 16px;
}

.checkout-qrPlaceholder {
    border: 1px dashed var(--color-border-strong);
    border-radius: var(--radius-sm);
    padding: 14px;
    background: #fafbfc;
}

.checkout-qrNote { font-size: 12px; color: var(--color-text-muted); line-height: 1.7; }

.checkout-meta {
    display: grid;
    gap: 6px;
    font-size: 13px;
    padding: 12px 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 14px;
}

.checkout-kv { margin-bottom: 14px; }

.checkout-countdown {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 8px;
    margin-bottom: 14px;
}

.checkout-countdown .mono { font-size: 18px; font-weight: 700; }

.checkout-refresh {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
}

.checkout-warning { margin-bottom: 0; }

.checkout-foot { text-align: center; margin-top: 14px; }

/* ---------- 响应式 ---------- */

@media (max-width: 900px) {
    .app-navToggle { display: inline-block; }

    .app-sidebar {
        position: fixed;
        top: 0;
        bottom: 0;
        left: 0;
        width: 240px;
        z-index: 40;
        transform: translateX(-100%);
        transition: transform 0.15s ease;
        box-shadow: 0 0 0 1px var(--color-border);
        overflow-y: auto;
        padding-top: 56px;
    }

    body.nav-open .app-sidebar { transform: translateX(0); }

    body.nav-open::after {
        content: "";
        position: fixed;
        inset: 0;
        background: rgba(16, 24, 40, 0.35);
        z-index: 35;
    }

    .app-topbarMeta { width: 100%; justify-content: space-between; }
    .app-switch { flex-wrap: wrap; }
    .app-account { text-align: left; }
    .app-main { padding: 14px 12px 32px; }
}

@media (max-width: 560px) {
    .kv-row { grid-template-columns: 1fr; gap: 2px; }
    .stat-grid { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
    .admin-metricGrid { grid-template-columns: 1fr; }
    .page-title { font-size: 18px; }
    .checkout-amountValue { font-size: 22px; }
    .form-inline { flex-direction: column; align-items: stretch; }
    .table { min-width: 520px; }
}