:root {
    --sidebar-width: 230px;
    --sidebar-bg: #1e293b;
    --sidebar-text: #94a3b8;
    --sidebar-active-bg: #0f172a;
    --sidebar-hover-bg: #334155;
    --sidebar-active-text: #f8fafc;
    --accent: #3b82f6;
}

* { box-sizing: border-box; }

body {
    background: #f1f5f9;
    min-height: 100vh;
    font-size: 0.925rem;
}

/* ── Layout ── */
.app-wrapper {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    overflow-y: auto;
    z-index: 100;
}

.main-content {
    margin-left: var(--sidebar-width);
    padding: 2rem;
    flex: 1;
    min-height: 100vh;
}

/* ── Sidebar ── */
.sidebar-brand {
    padding: 1.25rem 1.25rem 1rem;
    border-bottom: 1px solid #334155;
    flex-shrink: 0;
}

.sidebar-brand a {
    color: #f8fafc;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.sidebar .nav {
    padding: 0.5rem 0;
}

.sidebar .nav-link {
    color: var(--sidebar-text);
    padding: 0.55rem 1.25rem;
    border-radius: 0;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    transition: color 0.15s, background 0.15s;
    font-size: 0.9rem;
    border-right: 3px solid transparent;
}

.sidebar .nav-link:hover {
    color: var(--sidebar-active-text);
    background: var(--sidebar-hover-bg);
}

.sidebar .nav-link.active {
    color: var(--sidebar-active-text);
    background: var(--sidebar-active-bg);
    border-right-color: var(--accent);
}

.sidebar .nav-link i {
    font-size: 1rem;
    opacity: 0.8;
    width: 1.1rem;
    text-align: center;
}

.sidebar-footer {
    margin-top: auto;
    border-top: 1px solid #334155;
    padding: 0.4rem 0;
    flex-shrink: 0;
}

/* ── Page header ── */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.page-header h1 {
    font-size: 1.4rem;
    font-weight: 600;
    color: #1e293b;
    margin: 0;
}

/* ── Cards ── */
.card {
    border: 1px solid #e2e8f0;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.card-header {
    background: #f8fafc;
    border-bottom: 1px solid #e2e8f0;
    font-weight: 500;
}

/* ── Tables ── */
.table th {
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: #64748b;
}

.table td {
    vertical-align: middle;
}

/* ── Line items ── */
#line-items-body textarea {
    resize: vertical;
    min-height: 56px;
}

/* ── Stat cards ── */
.stat-card {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 0.5rem;
    padding: 1.25rem 1.5rem;
}

.stat-card .stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: #1e293b;
    line-height: 1;
}

.stat-card .stat-label {
    font-size: 0.8rem;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 0.25rem;
}

/* ── Totals panel ── */
.totals-table td {
    padding: 0.35rem 0;
    border: none;
}

.totals-table .total-row td {
    font-weight: 700;
    font-size: 1.05rem;
    border-top: 2px solid #e2e8f0;
    padding-top: 0.6rem;
}

/* ── Login page ── */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f1f5f9;
}

.login-card {
    width: 100%;
    max-width: 380px;
}

.login-card .card-body {
    padding: 2rem;
}

/* ── Public document view ── */
.doc-page {
    background: #f1f5f9;
    min-height: 100vh;
    padding: 2rem 1rem;
}

.doc-wrap {
    max-width: 820px;
    margin: 0 auto;
    background: #fff;
    border-radius: 0.5rem;
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
    overflow: hidden;
}

.doc-header {
    background: #1e293b;
    color: #fff;
    padding: 2rem 2.5rem;
}

.doc-header .doc-type {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    opacity: 0.6;
    margin-bottom: 0.25rem;
}

.doc-header .doc-number {
    font-size: 1.5rem;
    font-weight: 700;
}

.doc-body {
    padding: 2rem 2.5rem;
}

.doc-meta-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.doc-meta-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #94a3b8;
    margin-bottom: 0.25rem;
}

.doc-meta-value {
    color: #1e293b;
    line-height: 1.5;
}

.doc-items-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
}

.doc-items-table th {
    padding: 0.6rem 0.75rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #64748b;
    border-bottom: 2px solid #e2e8f0;
    text-align: left;
}

.doc-items-table td {
    padding: 0.75rem;
    border-bottom: 1px solid #f1f5f9;
    vertical-align: top;
}

.doc-items-table .text-right { text-align: right; }

.doc-totals {
    max-width: 280px;
    margin-left: auto;
}

.doc-totals table {
    width: 100%;
    border-collapse: collapse;
}

.doc-totals td {
    padding: 0.35rem 0;
}

.doc-totals .grand-total td {
    padding-top: 0.6rem;
    border-top: 2px solid #1e293b;
    font-weight: 700;
    font-size: 1.1rem;
}

.doc-notes {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid #e2e8f0;
    color: #475569;
    font-size: 0.9rem;
}

.doc-footer {
    background: #f8fafc;
    border-top: 1px solid #e2e8f0;
    padding: 1rem 2.5rem;
    font-size: 0.8rem;
    color: #94a3b8;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

@media print {
    .doc-page { background: #fff; padding: 0; }
    .doc-wrap { box-shadow: none; border-radius: 0; }
    .doc-footer .no-print { display: none; }
    .doc-header { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
}