/* ============================================================
   DESIGN TOKENS
   Concept: a working ledger, not a SaaS dashboard.
   Ink navy + paper + a brass "seal" accent for status/actions,
   monospace for anything numeric (invoice #, amounts, dates) —
   the precision-instrument feel that matches the OIS/ABSL brand work.
   ============================================================ */
:root {
    --ink:          #101826;   /* near-black navy, primary text/dark surfaces */
    --ink-soft:      #2C3A4E;  /* secondary text on paper */
    --paper:        #F6F5F1;   /* warm-neutral background, not the AI-default cream */
    --paper-raised: #FFFFFF;   /* cards */
    --line:         #DCD8CE;   /* hairline borders */
    --brass:        #B8873A;   /* seal / accent / primary action */
    --brass-dark:   #8E6825;
    --success:      #3B7A57;
    --success-bg:   #E7F0EA;
    --danger:       #A73E3E;
    --danger-bg:    #F5E7E7;
    --warn:         #B8873A;
    --warn-bg:      #F5EEDF;

    --font-display: 'Space Grotesk', 'Segoe UI', sans-serif;
    --font-body:    'Inter', 'Segoe UI', sans-serif;
    --font-mono:    'JetBrains Mono', 'Courier New', monospace;

    --radius: 3px;             /* near-zero radius — ledger/document feel, not app-bubble */
    --shadow-card: 0 1px 2px rgba(16,24,38,0.06), 0 1px 1px rgba(16,24,38,0.04);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: var(--font-body);
    background: var(--paper);
    color: var(--ink);
    font-size: 14px;
    line-height: 1.5;
}

h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--ink);
    margin: 0 0 0.4em;
    letter-spacing: -0.01em;
}

.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

a { color: var(--ink); }

/* ---------- App shell ---------- */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
    width: 232px;
    background: var(--ink);
    color: #C9D2DE;
    flex-shrink: 0;
    padding: 20px 0;
    display: flex;
    flex-direction: column;
}
.sidebar .brand {
    padding: 0 20px 18px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    margin-bottom: 14px;
}
.sidebar .brand .mark {
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.02em;
}
.sidebar .brand .sub { font-size: 11px; color: #7C8AA0; margin-top: 2px; }

.sidebar nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 20px;
    color: #B7C1D1;
    text-decoration: none;
    font-size: 13.5px;
    border-left: 2px solid transparent;
}
.sidebar nav a:hover { background: rgba(255,255,255,0.04); color: #fff; }
.sidebar nav a.active {
    background: rgba(184,135,58,0.12);
    border-left-color: var(--brass);
    color: #fff;
}
.sidebar nav .section-label {
    font-size: 10.5px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #5D6B80;
    padding: 16px 20px 6px;
}
.sidebar nav a.disabled {
    color: #4A5568;
    cursor: default;
    pointer-events: none;
}
.sidebar nav a.disabled .tag {
    font-size: 9px;
    background: rgba(255,255,255,0.06);
    padding: 1px 5px;
    border-radius: 2px;
    margin-left: auto;
}

/* ---------- Topbar with org switcher ("the ledger tab") ---------- */
.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar {
    height: 58px;
    background: var(--paper-raised);
    border-bottom: 1px solid var(--line);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
}
.org-switch {
    display: flex; align-items: center; gap: 10px;
    position: relative;
}
.org-seal {
    width: 30px; height: 30px;
    border-radius: 50%;
    background: var(--ink);
    color: var(--brass);
    display: flex; align-items: center; justify-content: center;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 12px;
    border: 1.5px solid var(--brass);
}
.org-switch select {
    border: none;
    background: transparent;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 14.5px;
    color: var(--ink);
    padding: 4px 2px;
    cursor: pointer;
}
.user-menu { display: flex; align-items: center; gap: 14px; font-size: 13px; color: var(--ink-soft); }

.content { padding: 26px 30px 60px; max-width: 1180px; }

/* ---------- Page header ---------- */
.page-head { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 20px; }
.page-head .eyebrow { font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--brass-dark); margin-bottom: 4px; }
.page-head h1 { font-size: 22px; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex; align-items: center; gap: 6px;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 13px;
    padding: 8px 16px;
    border-radius: var(--radius);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
}
.btn-primary { background: var(--ink); color: #fff; }
.btn-primary:hover { background: #1D2A3D; }
.btn-brass { background: var(--brass); color: #fff; }
.btn-brass:hover { background: var(--brass-dark); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink); }
.btn-danger { background: transparent; color: var(--danger); border-color: var(--danger); }
.btn-sm { padding: 5px 10px; font-size: 12px; }

/* ---------- Cards / tables ---------- */
.card {
    background: var(--paper-raised);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    padding: 20px;
    margin-bottom: 20px;
}
table { width: 100%; border-collapse: collapse; }
th {
    text-align: left;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--ink-soft);
    border-bottom: 1.5px solid var(--ink);
    padding: 8px 10px;
}
td { padding: 11px 10px; border-bottom: 1px solid var(--line); font-size: 13.5px; }
tr:hover td { background: rgba(184,135,58,0.04); }
.amount { font-family: var(--font-mono); text-align: right; }

/* ---------- Status seals (badges) ---------- */
.seal {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 10.5px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 3px 8px;
    border-radius: 2px;
    border: 1px solid currentColor;
}
.seal-draft   { color: #6B7280; background: #F1F1EF; }
.seal-sent    { color: #2A5DAB; background: #E8EFFB; }
.seal-partial { color: var(--warn); background: var(--warn-bg); }
.seal-paid    { color: var(--success); background: var(--success-bg); }
.seal-overdue { color: var(--danger); background: var(--danger-bg); }
.seal-void    { color: #6B7280; background: #ECECEC; text-decoration: line-through; }

/* ---------- Forms ---------- */
label { display: block; font-size: 12.5px; font-weight: 600; color: var(--ink-soft); margin-bottom: 5px; }
input, select, textarea {
    width: 100%;
    font-family: var(--font-body);
    font-size: 13.5px;
    padding: 8px 10px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
    color: var(--ink);
}
input:focus, select:focus, textarea:focus {
    outline: 2px solid var(--brass);
    outline-offset: 0;
    border-color: var(--brass);
}
.field { margin-bottom: 16px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.hint { font-size: 11.5px; color: #8A93A3; margin-top: 4px; }

/* ---------- Invoice line-item builder ---------- */
.line-items-table th, .line-items-table td { padding: 8px 6px; }
.line-items-table input, .line-items-table select { padding: 6px 8px; font-size: 13px; }
.line-items-table .col-desc { width: 40%; }
.line-items-table .col-qty, .line-items-table .col-price, .line-items-table .col-tax { width: 12%; }
.totals-block { max-width: 320px; margin-left: auto; margin-top: 14px; }
.totals-block .row { display: flex; justify-content: space-between; padding: 6px 0; font-size: 13.5px; }
.totals-block .row.grand { border-top: 1.5px solid var(--ink); font-family: var(--font-display); font-weight: 700; font-size: 16px; padding-top: 10px; }

/* ---------- Alerts ---------- */
.alert { padding: 10px 14px; border-radius: var(--radius); font-size: 13px; margin-bottom: 16px; }
.alert-error { background: var(--danger-bg); color: var(--danger); border: 1px solid var(--danger); }
.alert-success { background: var(--success-bg); color: var(--success); border: 1px solid var(--success); }

/* ---------- Empty state ---------- */
.empty-state { text-align: center; padding: 50px 20px; color: var(--ink-soft); }
.empty-state h3 { color: var(--ink); }

@media (max-width: 860px) {
    .sidebar { display: none; }
    .field-row { grid-template-columns: 1fr; }
}