/* ============================================================
   UNIHUB SOLUTIONS LTD — Invoice Management System
   Stylesheet — Refined Corporate Dark Theme
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --navy:       #0d1b2a;
    --navy-mid:   #162033;
    --navy-light: #1e2f45;
    --navy-card:  #1a2840;
    --gold:       #e8a020;
    --gold-light: #f5bc4a;
    --gold-dim:   rgba(232,160,32,0.12);
    --teal:       #2dd4bf;
    --red:        #ef4444;
    --green:      #22c55e;
    --amber:      #f59e0b;
    --text:       #e2e8f0;
    --text-muted: #7c93ae;
    --text-dim:   #4a6080;
    --border:     rgba(255,255,255,0.07);
    --border-gold:rgba(232,160,32,0.3);
    --shadow:     0 4px 24px rgba(0,0,0,0.4);
    --radius:     12px;
    --radius-sm:  8px;
    --sidebar-w:  260px;
    --font-serif: 'DM Serif Display', Georgia, serif;
    --font-sans:  'DM Sans', system-ui, sans-serif;
}

html { font-size: 15px; }
body {
    font-family: var(--font-sans);
    background: var(--navy);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    line-height: 1.6;
}

/* ---- SIDEBAR ---- */
.sidebar {
    width: var(--sidebar-w);
    background: var(--navy-mid);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0;
    height: 100vh;
    z-index: 100;
    transition: transform .3s ease;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 24px 20px;
    border-bottom: 1px solid var(--border);
}
.brand-logo {
    width: 42px; height: 42px;
    background: linear-gradient(135deg, var(--gold), var(--gold-light));
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-family: var(--font-serif);
    font-size: 1.4rem;
    color: var(--navy);
    font-weight: bold;
    flex-shrink: 0;
}
.brand-name  { display: block; font-weight: 700; font-size: 1rem; color: var(--text); letter-spacing: .3px; }
.brand-sub   { display: block; font-size: .72rem; color: var(--text-muted); letter-spacing: .5px; }

.nav-list { list-style: none; padding: 12px 0; flex: 1; overflow-y: auto; }
.nav-item a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 20px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: .88rem;
    font-weight: 500;
    border-left: 3px solid transparent;
    transition: all .18s ease;
}
.nav-item a svg { width: 18px; height: 18px; flex-shrink: 0; }
.nav-item a:hover { color: var(--text); background: rgba(255,255,255,0.04); }
.nav-item.active a {
    color: var(--gold);
    border-left-color: var(--gold);
    background: var(--gold-dim);
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border);
}
.company-info { display: flex; flex-direction: column; gap: 2px; }
.company-info span { font-size: .72rem; color: var(--text-dim); }

/* ---- MAIN WRAPPER ---- */
.main-wrapper {
    margin-left: var(--sidebar-w);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ---- TOPBAR ---- */
.topbar {
    height: 64px;
    background: var(--navy-mid);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 28px;
    position: sticky; top: 0; z-index: 50;
}
.topbar-left   { display: flex; align-items: center; gap: 16px; }
.page-title    { font-family: var(--font-serif); font-size: 1.3rem; color: var(--text); font-style: italic; }
.topbar-date   { font-size: .8rem; color: var(--text-muted); }
.menu-toggle   { background: none; border: none; cursor: pointer; color: var(--text-muted); display: none; }
.menu-toggle svg { width: 22px; height: 22px; }

/* ---- MAIN CONTENT ---- */
.main-content { padding: 28px; flex: 1; }

/* ---- CARDS ---- */
.card {
    background: var(--navy-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
}
.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}
.card-title {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: var(--text);
    font-style: italic;
}

/* ---- STAT GRID ---- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card {
    background: var(--navy-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 22px;
    position: relative;
    overflow: hidden;
    transition: transform .2s, box-shadow .2s;
}
.stat-card:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(0,0,0,0.5); }
.stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--gold), transparent);
}
.stat-label  { font-size: .78rem; color: var(--text-muted); letter-spacing: .6px; text-transform: uppercase; margin-bottom: 8px; }
.stat-value  { font-family: var(--font-serif); font-size: 1.7rem; color: var(--text); line-height: 1.2; }
.stat-sub    { font-size: .75rem; color: var(--text-dim); margin-top: 6px; }
.stat-icon   { position: absolute; right: 16px; top: 16px; opacity: .12; }
.stat-icon svg { width: 40px; height: 40px; }

/* ---- TABLES ---- */
.table-wrap  { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
thead th {
    text-align: left;
    padding: 10px 14px;
    font-size: .75rem;
    font-weight: 600;
    letter-spacing: .8px;
    text-transform: uppercase;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}
tbody td {
    padding: 13px 14px;
    font-size: .88rem;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: rgba(255,255,255,0.025); }
.td-actions { display: flex; gap: 6px; }

/* ---- BADGES ---- */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: .73rem;
    font-weight: 600;
    letter-spacing: .3px;
}
.badge-draft     { background: rgba(124,147,174,.15); color: var(--text-muted); }
.badge-pending   { background: rgba(245,158,11,.15);  color: var(--amber); }
.badge-invoiced  { background: rgba(45,212,191,.15);  color: var(--teal); }
.badge-paid      { background: rgba(34,197,94,.15);   color: var(--green); }
.badge-unpaid    { background: rgba(245,158,11,.15);  color: var(--amber); }
.badge-overdue   { background: rgba(239,68,68,.15);   color: var(--red); }
.badge-cancelled { background: rgba(124,147,174,.15); color: var(--text-muted); }

/* ---- BUTTONS ---- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 18px;
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: .85rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all .18s ease;
    text-decoration: none;
    white-space: nowrap;
}
.btn svg { width: 15px; height: 15px; }
.btn-primary { background: linear-gradient(135deg, var(--gold), var(--gold-light)); color: var(--navy); }
.btn-primary:hover { filter: brightness(1.1); transform: translateY(-1px); }
.btn-outline { background: transparent; border: 1px solid var(--border-gold); color: var(--gold); }
.btn-outline:hover { background: var(--gold-dim); }
.btn-ghost  { background: rgba(255,255,255,.06); color: var(--text); }
.btn-ghost:hover  { background: rgba(255,255,255,.1); }
.btn-danger { background: rgba(239,68,68,.15); color: var(--red); border: 1px solid rgba(239,68,68,.3); }
.btn-danger:hover { background: rgba(239,68,68,.25); }
.btn-sm { padding: 5px 12px; font-size: .78rem; }
.btn-icon { padding: 7px; }

/* ---- FORMS ---- */
.form-grid   { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.form-group  { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: .78rem; font-weight: 600; color: var(--text-muted); letter-spacing: .4px; text-transform: uppercase; }
input, select, textarea {
    background: var(--navy-light);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: var(--font-sans);
    font-size: .9rem;
    padding: 10px 14px;
    width: 100%;
    transition: border-color .18s;
    outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--gold); box-shadow: 0 0 0 3px var(--gold-dim); }
textarea { resize: vertical; min-height: 80px; }
select option { background: var(--navy-mid); }

/* ---- ITEMS TABLE (order form) ---- */
.items-table { width: 100%; border-collapse: collapse; margin-bottom: 12px; }
.items-table th {
    font-size: .72rem; font-weight: 600; letter-spacing: .6px; text-transform: uppercase;
    color: var(--text-muted); padding: 8px 10px; border-bottom: 1px solid var(--border);
    text-align: left;
}
.items-table td { padding: 6px 4px; vertical-align: middle; }
.items-table input, .items-table select {
    padding: 7px 10px; font-size: .85rem;
}
.items-table .td-del { text-align: center; width: 36px; }
.items-table .td-del button {
    background: none; border: none; color: var(--red); cursor: pointer; font-size: 1.1rem; line-height: 1;
    padding: 4px 8px; border-radius: 6px; transition: background .15s;
}
.items-table .td-del button:hover { background: rgba(239,68,68,.12); }

/* ---- SUMMARY BOX ---- */
.summary-box {
    background: var(--navy-light);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px 20px;
    min-width: 280px;
}
.summary-row { display: flex; justify-content: space-between; padding: 5px 0; font-size: .88rem; }
.summary-row.total {
    border-top: 1px solid var(--border);
    margin-top: 6px;
    padding-top: 10px;
    font-weight: 700;
    font-size: 1rem;
    color: var(--gold);
}

/* ---- MODAL ---- */
.modal-overlay {
    display: none;
    position: fixed; inset: 0;
    background: rgba(0,0,0,.6);
    z-index: 200;
    backdrop-filter: blur(4px);
}
.modal {
    display: none;
    position: fixed;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    background: var(--navy-mid);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    z-index: 201;
    width: 90%;
    max-width: 560px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0,0,0,.6);
    animation: modalIn .2s ease;
}
@keyframes modalIn { from { opacity:0; transform: translate(-50%,-48%); } }
.modal.active, .modal-overlay.active { display: block; }
.modal-close {
    position: absolute; top: 14px; right: 16px;
    background: none; border: none; color: var(--text-muted);
    font-size: 1.4rem; cursor: pointer; line-height: 1;
}
.modal-close:hover { color: var(--text); }
.modal-title { font-family: var(--font-serif); font-size: 1.2rem; margin-bottom: 20px; font-style: italic; }

/* ---- TOAST ---- */
.toast {
    position: fixed; bottom: 24px; right: 24px;
    background: var(--navy-card);
    border: 1px solid var(--border);
    border-left: 4px solid var(--green);
    border-radius: var(--radius-sm);
    padding: 14px 20px;
    font-size: .88rem;
    color: var(--text);
    z-index: 300;
    opacity: 0;
    transform: translateY(10px);
    transition: all .25s ease;
    pointer-events: none;
    max-width: 320px;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.error { border-left-color: var(--red); }

/* ---- EMPTY STATE ---- */
.empty-state {
    text-align: center;
    padding: 50px 20px;
    color: var(--text-dim);
}
.empty-state svg { width: 48px; height: 48px; opacity: .3; margin-bottom: 12px; }
.empty-state p { font-size: .9rem; }

/* ---- SECTION ---- */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}
.section-title {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    color: var(--text);
    font-style: italic;
}

/* ---- SEARCH / FILTER BAR ---- */
.filter-bar { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }
.search-input {
    flex: 1;
    min-width: 180px;
    background: var(--navy-light);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    padding: 9px 14px;
    font-size: .88rem;
    outline: none;
}
.search-input:focus { border-color: var(--gold); }

/* ============================================================
   PRINT / INVOICE & RECEIPT STYLES
   ============================================================ */
.print-doc {
    max-width: 800px;
    margin: 0 auto;
    background: #fff;
    color: #111;
    padding: 48px 52px;
    font-family: var(--font-sans);
    font-size: 13px;
    line-height: 1.6;
    border-radius: var(--radius);
}

.print-doc .doc-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    border-bottom: 3px solid #0d1b2a;
    padding-bottom: 24px;
    margin-bottom: 28px;
}

.print-doc .company-logo {
    display: flex; align-items: center; gap: 12px;
}
.print-doc .logo-box {
    width: 48px; height: 48px;
    background: #0d1b2a;
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: #e8a020;
    font-weight: bold;
}
.print-doc .company-name { font-family: var(--font-serif); font-size: 1.3rem; color: #0d1b2a; }
.print-doc .company-details { font-size: .8rem; color: #555; margin-top: 2px; }

.print-doc .doc-type-box {
    text-align: right;
}
.print-doc .doc-type {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: #0d1b2a;
    letter-spacing: 2px;
    text-transform: uppercase;
}
.print-doc .doc-number { font-size: .9rem; color: #888; }
.print-doc .doc-status-paid {
    display: inline-block;
    background: #dcfce7;
    color: #16a34a;
    border: 2px solid #16a34a;
    border-radius: 8px;
    padding: 4px 16px;
    font-weight: 700;
    font-size: .85rem;
    margin-top: 8px;
    letter-spacing: 1px;
}
.print-doc .doc-status-unpaid {
    display: inline-block;
    background: #fef9c3;
    color: #b45309;
    border: 2px solid #d97706;
    border-radius: 8px;
    padding: 4px 16px;
    font-weight: 700;
    font-size: .85rem;
    margin-top: 8px;
    letter-spacing: 1px;
}

.print-doc .doc-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 28px;
}
.print-doc .meta-section h4 {
    font-size: .75rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: #888;
    margin-bottom: 6px;
    font-weight: 600;
}
.print-doc .meta-section p { font-size: .88rem; color: #222; }
.print-doc .meta-section strong { color: #0d1b2a; }

.print-doc .doc-table { width: 100%; border-collapse: collapse; margin-bottom: 24px; }
.print-doc .doc-table thead th {
    background: #0d1b2a;
    color: #e8a020;
    padding: 10px 12px;
    font-size: .78rem;
    letter-spacing: .6px;
    text-transform: uppercase;
    text-align: left;
}
.print-doc .doc-table thead th:last-child,
.print-doc .doc-table tbody td:last-child { text-align: right; }
.print-doc .doc-table tbody td {
    padding: 10px 12px;
    border-bottom: 1px solid #eee;
    font-size: .88rem;
}
.print-doc .doc-table tbody tr:nth-child(even) td { background: #f9f9f9; }

.print-doc .doc-totals {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 28px;
}
.print-doc .totals-box {
    width: 300px;
}
.print-doc .totals-row {
    display: flex;
    justify-content: space-between;
    padding: 5px 0;
    font-size: .88rem;
    color: #444;
}
.print-doc .totals-row.grand {
    border-top: 2px solid #0d1b2a;
    margin-top: 6px;
    padding-top: 10px;
    font-size: 1.05rem;
    font-weight: 700;
    color: #0d1b2a;
}

.print-doc .doc-footer {
    border-top: 1px solid #eee;
    padding-top: 16px;
    text-align: center;
    font-size: .8rem;
    color: #888;
}
.print-doc .doc-payment-info {
    background: #f0f9ff;
    border: 1px solid #bae6fd;
    border-radius: 8px;
    padding: 14px 16px;
    margin-bottom: 24px;
    font-size: .85rem;
}
.print-doc .doc-payment-info h4 { font-size: .75rem; letter-spacing: 1px; text-transform: uppercase; color: #0369a1; margin-bottom: 6px; }

.doc-actions { display: flex; gap: 10px; margin-bottom: 20px; }

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
    :root { --sidebar-w: 0px; }
    .sidebar { transform: translateX(-260px); width: 260px; }
    .sidebar.open { transform: translateX(0); }
    .main-wrapper { margin-left: 0; }
    .menu-toggle { display: flex; }
    .main-content { padding: 16px; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .topbar { padding: 0 16px; }
}

@media print {
    body { background: #fff; color: #111; font-size: 12px; }
    .sidebar, .topbar, .doc-actions, .btn, nav { display: none !important; }
    .main-wrapper { margin-left: 0; }
    .main-content { padding: 0; }
    .print-doc { box-shadow: none; border-radius: 0; padding: 0; }
    .card { border: none; padding: 0; box-shadow: none; background: transparent; }
    a { text-decoration: none; }
}