/*
  Ahmad Traders — Design System
  ------------------------------------------------------------------
  Industrial/construction identity: deep steel-navy structure, safety-
  amber accent (the color of hazard tape and site signage), condensed
  display type for headers (steel-stamp / site-signage feel), and a
  tabular-numeral body face for ledgers and invoice figures.
  No external CDN dependency — self-contained, loads instantly even
  if third-party CDNs are blocked on a given hosting environment.
*/

:root {
    /* Palette */
    --ink-900: #0F1B2E;      /* deepest navy — sidebar, headers */
    --ink-800: #16253D;
    --ink-700: #223655;
    --steel-500: #3E5C7A;    /* secondary steel blue */
    --steel-300: #7C93AC;
    --amber-500: #F0A202;    /* safety amber — primary accent/CTA */
    --amber-600: #D68F00;
    --amber-100: #FDF1D6;
    --success-600: #1F8A5F;
    --success-100: #E3F5EC;
    --danger-600: #C0392B;
    --danger-100: #FBE7E4;
    --paper-100: #F4F6F8;    /* app background */
    --paper-0: #FFFFFF;      /* card surfaces */
    --line-200: #E3E8EE;
    --text-900: #16202E;
    --text-600: #556272;
    --text-muted: #6B7684;

    /* Type */
    --font-display: 'Barlow Condensed', 'Arial Narrow', sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;

    --radius-md: 10px;
    --radius-lg: 16px;
    --shadow-card: 0 1px 2px rgba(15,27,46,0.04), 0 4px 16px rgba(15,27,46,0.06);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: var(--font-body);
    background: var(--paper-100);
    color: var(--text-900);
    -webkit-font-smoothing: antialiased;
    font-variant-numeric: tabular-nums;
}

h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 600;
    letter-spacing: 0.01em;
    margin: 0;
    color: var(--ink-900);
}

a { color: inherit; text-decoration: none; }

/* ---------------- App Shell ---------------- */

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

.sidebar {
    width: 240px;
    flex-shrink: 0;
    background: linear-gradient(180deg, var(--ink-900) 0%, var(--ink-800) 100%);
    color: #C9D4E2;
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
}

.sidebar-brand {
    padding: 24px 20px 16px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-brand .mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    background: var(--amber-500);
    color: var(--ink-900);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 17px;
    border-radius: 8px;
    margin-bottom: 10px;
}

.sidebar-brand .name {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 600;
    color: #fff;
    line-height: 1.15;
}

.sidebar-brand .tagline {
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--steel-300);
    margin-top: 2px;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    overflow-y: auto;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: #C9D4E2;
    transition: background 0.15s ease, color 0.15s ease;
}

.sidebar-nav a svg { width: 18px; height: 18px; flex-shrink: 0; opacity: 0.85; }

.sidebar-nav a:hover { background: rgba(255,255,255,0.06); color: #fff; }

.sidebar-nav a.active {
    background: var(--amber-500);
    color: var(--ink-900);
    font-weight: 600;
}
.sidebar-nav a.active svg { opacity: 1; }

.sidebar-footer {
    padding: 16px 20px 20px;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.sidebar-user { font-size: 13px; color: #fff; font-weight: 600; }
.sidebar-role {
    display: inline-block;
    margin-top: 4px;
    font-size: 10px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    background: rgba(240,162,2,0.18);
    color: var(--amber-500);
    padding: 2px 8px;
    border-radius: 100px;
}

.sidebar-footer .logout {
    display: block;
    margin-top: 14px;
    font-size: 13px;
    color: var(--steel-300);
}
.sidebar-footer .logout:hover { color: #fff; }

.main {
    flex: 1;
    min-width: 0;
}

.topbar {
    display: none; /* shown on mobile below */
}

.content {
    max-width: 1100px;
    margin: 0 auto;
    padding: 32px 28px 100px;
}

.page-header { margin-bottom: 24px; }
.page-header h1 { font-size: 28px; }
.page-header p { color: var(--text-muted); font-size: 14px; margin-top: 4px; }

/* ---------------- Components ---------------- */

.card {
    background: var(--paper-0);
    border: 1px solid var(--line-200);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
}

.card-pad { padding: 20px; }

.stat-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.stat-card {
    background: var(--paper-0);
    border: 1px solid var(--line-200);
    border-left: 4px solid var(--steel-500);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    padding: 18px 20px;
}
.stat-card.accent-amber { border-left-color: var(--amber-500); }
.stat-card.accent-success { border-left-color: var(--success-600); }
.stat-card.accent-ink { border-left-color: var(--ink-900); }

.stat-label {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.stat-value {
    font-family: var(--font-display);
    font-size: 32px;
    font-weight: 600;
    color: var(--ink-900);
    margin-top: 6px;
    line-height: 1.1;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 18px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    border: 1px solid transparent;
    cursor: pointer;
    transition: filter 0.15s ease, background 0.15s ease;
}
.btn-primary { background: var(--ink-900); color: #fff; }
.btn-primary:hover { filter: brightness(1.2); }
.btn-accent { background: var(--amber-500); color: var(--ink-900); }
.btn-accent:hover { background: var(--amber-600); }
.btn-outline { background: transparent; border-color: var(--line-200); color: var(--text-900); }
.btn-outline:hover { background: var(--paper-100); }
.btn-block { width: 100%; }
.btn-sm { padding: 6px 12px; font-size: 12px; }

.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 100px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}
.badge-success { background: var(--success-100); color: var(--success-600); }
.badge-danger { background: var(--danger-100); color: var(--danger-600); }
.badge-amber { background: var(--amber-100); color: var(--amber-600); }
.badge-neutral { background: var(--line-200); color: var(--text-muted); }

label.field-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-900);
    margin-bottom: 6px;
}

.input, select.input, input[type=text], input[type=email], input[type=password], input[type=number], input[type=date] {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid var(--line-200);
    border-radius: 8px;
    font-size: 14px;
    font-family: var(--font-body);
    background: var(--paper-0);
    color: var(--text-900);
}
.input:focus, input:focus, select:focus {
    outline: none;
    border-color: var(--ink-900);
    box-shadow: 0 0 0 3px rgba(15,27,46,0.08);
}

kbd {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 11px;
    background: var(--line-200);
    color: var(--text-900);
    padding: 2px 6px;
    border-radius: 4px;
    border-bottom: 2px solid #C7CFD9;
}

.divide-list > * + * { border-top: 1px solid var(--line-200); }

.row-between { display: flex; align-items: center; justify-content: space-between; }

.table-clean { width: 100%; border-collapse: collapse; }
.table-clean th {
    text-align: left; font-size: 11px; text-transform: uppercase; letter-spacing: 0.04em;
    color: var(--text-muted); font-weight: 700; padding: 10px 14px; border-bottom: 1px solid var(--line-200);
}
.table-clean td { padding: 12px 14px; font-size: 14px; border-bottom: 1px solid var(--line-200); }
.table-clean tr:last-child td { border-bottom: none; }

.alert { border-radius: var(--radius-md); padding: 12px 16px; font-size: 14px; margin-bottom: 16px; }
.alert-success { background: var(--success-100); color: var(--success-600); border: 1px solid #BEE6D2; }
.alert-danger { background: var(--danger-100); color: var(--danger-600); border: 1px solid #F3C6BF; }

/* ---------------- Bottom nav (mobile PWA) ---------------- */

.bottom-nav {
    position: fixed; bottom: 0; left: 0; right: 0;
    background: var(--paper-0);
    border-top: 1px solid var(--line-200);
    display: none;
    z-index: 50;
    padding-bottom: env(safe-area-inset-bottom);
}
.bottom-nav .grid3 { display: grid; grid-template-columns: repeat(3, 1fr); height: 64px; }
.bottom-nav a {
    display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px;
    color: var(--text-muted); font-size: 11px; font-weight: 600;
}
.bottom-nav a.active { color: var(--ink-900); }
.bottom-nav svg { width: 22px; height: 22px; }

/* ---------------- Responsive ---------------- */

@media (max-width: 860px) {
    .sidebar { display: none; }
    .topbar {
        display: flex; align-items: center; justify-content: space-between;
        background: var(--ink-900); color: #fff; padding: 14px 18px; position: sticky; top: 0; z-index: 40;
    }
    .topbar .name { font-family: var(--font-display); font-size: 18px; font-weight: 600; }
    .content { padding: 20px 16px 90px; }
    .stat-grid { grid-template-columns: repeat(2, 1fr); }
    .bottom-nav { display: block; }
}

@media (max-width: 480px) {
    .stat-grid { grid-template-columns: 1fr; }
}