/* ============================================================
   Janta Pustak Bhandar — visual system
   A stationery/book shop deals in paper, ledgers, ruled sheets,
   and rubber stamps — so the app borrows those exact materials
   instead of looking like a generic admin dashboard.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Zilla+Slab:wght@500;600;700&family=Source+Sans+3:wght@400;500;600&family=IBM+Plex+Mono:wght@500;600&display=swap');

:root {
    --paper:        #FAF6EC;
    --paper-raised: #FFFFFF;
    --rule-line:    #DCD3B4;
    --ink:          #2B2620;
    --ink-soft:     #6B6455;
    --navy:         #2F4159;
    --navy-dark:    #22314A;
    --stamp-red:    #A63D40;
    --stamp-green:  #4C7A5D;
    --margin-red:   #C97B7E;

    --font-display: 'Zilla Slab', Georgia, serif;
    --font-body: 'Source Sans 3', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

    --radius: 4px;
    --shadow: 0 1px 3px rgba(43,38,32,0.08), 0 1px 2px rgba(43,38,32,0.06);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 15px;
    line-height: 1.5;
    /* faint ruled-paper lines across the whole app background */
    background-image: repeating-linear-gradient(
        to bottom,
        transparent,
        transparent 27px,
        var(--rule-line) 27px,
        var(--rule-line) 28px
    );
}

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

h1, h2, h3 { font-family: var(--font-display); font-weight: 600; margin: 0 0 0.4em; color: var(--ink); }
h1 { font-size: 1.7rem; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.05rem; }

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

/* ---------- App shell ---------- */
.app-header {
    background: var(--navy-dark);
    color: #fff;
    padding: 0.9rem 1.2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 20;
}
.app-header .brand {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.app-header .brand .mark {
    display: inline-block;
    width: 26px; height: 26px;
    border: 2px solid #E8C468;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.8rem;
    color: #E8C468;
    transform: rotate(-8deg);
}
.app-header nav { display: flex; gap: 1.1rem; align-items: center; flex-wrap: wrap; }
.app-header nav a {
    color: #D8DEE8;
    text-decoration: none;
    font-size: 0.92rem;
    padding: 0.3rem 0.1rem;
    border-bottom: 2px solid transparent;
}
.app-header nav a.active, .app-header nav a:hover { color: #fff; border-bottom-color: #E8C468; }
.app-header .user-chip { font-size: 0.85rem; color: #B9C2D0; }

.container {
    max-width: 1040px;
    margin: 0 auto;
    padding: 1.5rem 1.2rem 3rem;
}

/* ---------- Cards / paper sheets ---------- */
.sheet {
    background: var(--paper-raised);
    border: 1px solid var(--rule-line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.25rem 1.4rem;
    margin-bottom: 1.2rem;
}
.sheet-title-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.9rem; gap: 0.75rem; flex-wrap: wrap; }

.grid { display: grid; gap: 1rem; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 720px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }

/* ---------- Stat tiles ---------- */
.stat {
    background: var(--paper-raised);
    border: 1px solid var(--rule-line);
    border-left: 4px solid var(--navy);
    border-radius: var(--radius);
    padding: 0.9rem 1.1rem;
}
.stat.positive { border-left-color: var(--stamp-green); }
.stat.warning { border-left-color: var(--stamp-red); }
.stat .label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--ink-soft); }
.stat .value { font-family: var(--font-mono); font-size: 1.5rem; font-weight: 600; margin-top: 0.15rem; }

/* ---------- Rubber stamp badges (signature element) ---------- */
.stamp {
    display: inline-block;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 0.15rem 0.5rem;
    border: 2px solid currentColor;
    border-radius: 3px;
    transform: rotate(-3deg);
    white-space: nowrap;
}
.stamp-red { color: var(--stamp-red); }
.stamp-green { color: var(--stamp-green); }
.stamp-navy { color: var(--navy); }

/* ---------- Tables (ledger rows) ---------- */
table.ledger { width: 100%; border-collapse: collapse; }
table.ledger th {
    text-align: left;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--ink-soft);
    border-bottom: 2px solid var(--ink);
    padding: 0.5rem 0.6rem;
}
table.ledger td {
    padding: 0.55rem 0.6rem;
    border-bottom: 1px solid var(--rule-line);
    vertical-align: middle;
}
table.ledger tr:hover td { background: #FBF8F0; }
table.ledger td.num, table.ledger th.num { text-align: right; font-family: var(--font-mono); }

/* ---------- Forms ---------- */
label { display: block; font-size: 0.85rem; color: var(--ink-soft); margin-bottom: 0.25rem; }
input, select, textarea {
    width: 100%;
    font-family: var(--font-body);
    font-size: 0.95rem;
    padding: 0.5rem 0.6rem;
    border: 1px solid var(--rule-line);
    border-radius: var(--radius);
    background: #fff;
    color: var(--ink);
}
input.mono-input { font-family: var(--font-mono); }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--navy); outline-offset: 1px; }
.field { margin-bottom: 0.9rem; }
.field-row { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.field-row > .field { flex: 1; min-width: 140px; }

.btn {
    display: inline-block;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.92rem;
    padding: 0.55rem 1.1rem;
    border-radius: var(--radius);
    border: 1px solid var(--navy);
    background: var(--navy);
    color: #fff;
    cursor: pointer;
    text-decoration: none;
}
.btn:hover { background: var(--navy-dark); }
.btn.secondary { background: transparent; color: var(--navy); }
.btn.danger { background: var(--stamp-red); border-color: var(--stamp-red); }
.btn.small { font-size: 0.8rem; padding: 0.32rem 0.7rem; }

.helptext { font-size: 0.82rem; color: var(--ink-soft); margin-top: 0.2rem; }
.error-box { background: #FBEAEA; border: 1px solid var(--stamp-red); color: #7A2A2C; padding: 0.7rem 1rem; border-radius: var(--radius); margin-bottom: 1rem; }
.success-box { background: #EAF2ED; border: 1px solid var(--stamp-green); color: #2E4F3A; padding: 0.7rem 1rem; border-radius: var(--radius); margin-bottom: 1rem; }

/* row builder used in the purchase-entry and billing screens */
.line-row { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1fr auto; gap: 0.5rem; align-items: end; margin-bottom: 0.6rem; padding-bottom: 0.6rem; border-bottom: 1px dashed var(--rule-line); }
@media (max-width: 720px) { .line-row { grid-template-columns: 1fr 1fr; } }

/* login screen */
.login-wrap { max-width: 380px; margin: 10vh auto; }
.login-wrap .mark-big { width: 56px; height: 56px; border: 3px solid var(--navy); border-radius: 50%; display:flex; align-items:center; justify-content:center; margin: 0 auto 1rem; font-family: var(--font-display); font-weight:700; color: var(--navy); transform: rotate(-6deg); font-size:1.4rem;}

/* mobile: collapse header nav into a simple wrap, POS/desktop keeps single row */
@media (max-width: 640px) {
    .app-header { flex-direction: column; align-items: flex-start; gap: 0.6rem; }
    .container { padding: 1rem 0.8rem 2.5rem; }
}