:root {
    --bg: #f6f8fc;
    --card: #ffffff;
    --border: #e7ebf3;
    --text: #1f2937;
    --muted: #6b7280;
    --primary: #2f6bff;
    --primary-soft: #eef4ff;
    --danger: #d92d20;
    --success: #12b76a;
    --shadow: 0 14px 40px rgba(28, 46, 89, 0.08);
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
    background: var(--bg);
    color: var(--text);
}
a { text-decoration: none; color: inherit; }
button, input, select { font: inherit; }

.invoice-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 280px 1fr;
}

.invoice-sidebar {
    background: #0f172a;
    color: #fff;
    padding: 28px 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.site-logo {
    display: flex;
    gap: 12px;
    align-items: center;
    color: #fff;
}
.site-logo-mark {
    width: 44px;
    height: 44px;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #2f6bff, #7c9cff);
    font-weight: 700;
}
.site-logo strong { display: block; font-size: 22px; }
.site-logo em { display: block; color: #c5d0e6; font-size: 12px; font-style: normal; }

.invoice-nav { display: grid; gap: 18px; }
.nav-group h3 {
    margin: 0 0 10px;
    font-size: 14px;
    color: #9fb0d2;
}
.nav-link {
    display: block;
    padding: 10px 12px;
    border-radius: 12px;
    color: #e8eefc;
    font-size: 14px;
}
.nav-link:hover, .nav-link.active {
    background: rgba(47, 107, 255, 0.2);
    color: #fff;
}

.user-card {
    margin-top: auto;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 18px;
    padding: 16px;
}
.user-card-label { color: #94a3b8; font-size: 12px; }
.user-card-name { margin-top: 4px; font-size: 18px; font-weight: 700; }
.user-card-meta { margin-top: 4px; color: #c8d5ee; font-size: 13px; }
.user-card-actions { display: flex; gap: 10px; margin-top: 14px; }

.invoice-main { padding: 28px; }
.banner2 {
    background: linear-gradient(135deg, #152441, #2f6bff);
    color: #fff;
    border-radius: 24px;
    padding: 26px 30px;
    box-shadow: var(--shadow);
}
.banner2 h1 { margin: 0; font-size: 32px; }
.banner2 p { margin: 10px 0 0; color: rgba(255,255,255,.84); }

.invoice-panel { margin-top: 20px; }
.tool-block { display: grid; gap: 20px; }
.tool-head h2 { margin: 0; font-size: 28px; }
.tool-head p { margin: 10px 0 0; color: var(--muted); }
.tool-head-split {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.tool-head-actions { display: flex; gap: 12px; }

.upload-zone, .step-card, .file-list-card, .setting-card, .result-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 24px;
    box-shadow: var(--shadow);
}

.upload-zone {
    padding: 36px 24px;
    text-align: center;
    border-style: dashed;
    background: linear-gradient(180deg, #fbfcff, #f6f9ff);
}
.hidden-input { display: none; }
.upload-hint { margin: 16px 0 6px; font-size: 18px; font-weight: 600; }
.upload-subhint { margin: 0; color: var(--muted); }

.step-card { padding: 22px 24px; }
.step-card h3 { margin: 0 0 12px; font-size: 18px; }
.step-card ol { margin: 0; padding-left: 20px; color: var(--muted); display: grid; gap: 8px; }

.process-layout {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 20px;
}
.file-list-card, .setting-card, .result-card { padding: 22px; }
.card-title-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}
.card-title-row h3, .setting-card h3 { margin: 0; font-size: 20px; }
.card-title-row span { color: var(--muted); font-size: 13px; }
.file-list { display: grid; gap: 12px; }
.file-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: #fbfcff;
}
.file-main { display: grid; gap: 4px; }
.file-main span { color: var(--muted); font-size: 13px; }
.file-status.pending {
    color: #6941c6;
    background: #f3ebff;
    border-radius: 999px;
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 700;
}

.setting-form { display: grid; gap: 18px; margin-top: 16px; }
.form-grid, .margin-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}
.setting-form label { display: grid; gap: 8px; }
.setting-form span { font-size: 14px; color: var(--muted); }
.setting-form input[type="text"],
.setting-form input[type="number"],
.setting-form select {
    height: 44px;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 0 14px;
    background: #fff;
}
.form-row-inline {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}
.checkbox-label {
    display: inline-flex !important;
    align-items: center;
    gap: 8px;
}
.inline-tip { color: var(--muted); font-size: 13px; }
.action-row { display: flex; justify-content: flex-end; }

.result-status {
    display: flex;
    gap: 16px;
    align-items: center;
    padding: 18px;
    border: 1px solid #b7ebd2;
    background: #edfdf3;
    border-radius: 18px;
}
.status-badge {
    background: var(--success);
    color: #fff;
    border-radius: 999px;
    padding: 8px 16px;
    font-weight: 700;
}
.result-status p { margin: 8px 0 0; color: #027a48; }
.result-actions {
    margin-top: 18px;
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}
.result-tips { margin-top: 18px; color: var(--muted); }
.delete-feedback { color: var(--danger); font-weight: 700; }
.hidden { display: none; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: .2s ease;
    padding: 0 18px;
    height: 42px;
    font-weight: 600;
}
.btn:hover { transform: translateY(-1px); }
.btn-sm { height: 36px; padding: 0 14px; }
.btn-large { height: 48px; padding: 0 22px; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-ghost { background: #fff; color: var(--text); border-color: var(--border); }
.btn-danger { background: #fff1f3; color: var(--danger); border-color: #f6c7ce; }

@media (max-width: 1100px) {
    .invoice-shell { grid-template-columns: 1fr; }
    .invoice-sidebar { padding-bottom: 20px; }
    .process-layout { grid-template-columns: 1fr; }
}