/* ─────────────────────────────────────────────────────────────────────
   main.css — Textbook Sales System
   ───────────────────────────────────────────────────────────────────── */

@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Syne:wght@600;700;800&display=swap');

:root {
  --bg:        #0e0f11;
  --surface:   #16181c;
  --surface2:  #1e2026;
  --border:    #2a2d35;
  --accent:    #f0c040;
  --accent2:   #3dd68c;
  --danger:    #f05555;
  --warning:   #f09040;
  --info:      #60b8f0;
  --purple:    #a78fff;
  --text:      #e8eaf0;
  --muted:     #6b7280;
  --radius:    6px;
  --mono:      'DM Mono', monospace;
  --display:   'Syne', sans-serif;
  --nav-h:     56px;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 14px;
  min-height: 100vh;
}

/* ── TOPNAV ── */
.topnav {
  position: sticky; top: 0; z-index: 100;
  width: 100%; height: var(--nav-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center;
  padding: 0 1.5rem; gap: 1.5rem;
}
.nav-brand {
  font-family: var(--display); font-weight: 800; font-size: 1.05rem;
  color: var(--accent); letter-spacing: -.4px; white-space: nowrap;
}
.nav-links { display: flex; flex: 1; gap: .2rem; }
.nav-link {
  padding: .45rem .9rem; border-radius: var(--radius);
  font-size: .75rem; letter-spacing: .06em; text-transform: uppercase;
  color: var(--muted); text-decoration: none;
  transition: color .15s, background .15s;
}
.nav-link:hover       { color: var(--text); background: rgba(255,255,255,.04); }
.nav-link.active      { color: var(--accent); background: rgba(240,192,64,.08); }
.nav-user { display: flex; align-items: center; gap: .7rem; }
.user-chip {
  font-size: .72rem; color: var(--muted); padding: .3rem .7rem;
  border: 1px solid var(--border); border-radius: 999px; white-space: nowrap;
}
.user-chip.admin { color: var(--accent); border-color: rgba(240,192,64,.3); }
.btn-logout {
  font-size: .72rem; color: var(--muted); text-decoration: none;
  padding: .3rem .7rem; border: 1px solid var(--border); border-radius: var(--radius);
  transition: color .15s, border-color .15s;
}
.btn-logout:hover { color: var(--danger); border-color: var(--danger); }

/* ── LAYOUT ── */
.container { max-width: 1100px; margin: 0 auto; padding: 2rem 1.5rem; }

/* ── SECTION ── */
.section { margin-bottom: 2.2rem; }
.section-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: .9rem; flex-wrap: wrap; gap: .6rem; }
.section-title {
  font-family: var(--display); font-size: .85rem; font-weight: 700;
  color: var(--muted); letter-spacing: .1em; text-transform: uppercase;
  display: flex; align-items: baseline; gap: .5rem;
}
.section-sub { font-size: .65rem; color: var(--muted); text-transform: none; letter-spacing: 0; font-family: var(--mono); }

/* ── CARD ── */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 2rem; }
.card-header { margin-bottom: 1.8rem; padding-bottom: 1.1rem; border-bottom: 1px solid var(--border); }
.card-header h1 { font-family: var(--display); font-size: 1.5rem; font-weight: 700; margin-bottom: .25rem; }
.card-header p  { font-size: .8rem; color: var(--muted); }

/* ── STAT GRID ── */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: .85rem; }
.stat-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.1rem 1rem; }
.stat-label { font-size: .63rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-bottom: .4rem; }
.stat-value { font-family: var(--display); font-size: 1.85rem; font-weight: 800; color: var(--accent); line-height: 1; }
.stat-card.green .stat-value { color: var(--accent2); }
.stat-card.muted .stat-value { color: var(--text); }

/* ── STOCK BAR ── */
.stock-bar-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem; margin-bottom: .85rem; }
.stock-bar-label { display: flex; justify-content: space-between; font-size: .72rem; color: var(--muted); margin-bottom: .5rem; }
.stock-bar-track { height: 8px; background: var(--border); border-radius: 4px; overflow: hidden; }
.stock-bar-fill  { height: 100%; background: var(--accent2); border-radius: 4px; transition: width .6s ease, background .6s ease; }

/* ── FORM ── */
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.form-group { margin-bottom: 1.2rem; }
label { display: block; font-size: .7rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-bottom: .4rem; }
.req { color: var(--accent); margin-left: 2px; }

input[type="text"], input[type="number"], input[type="password"], select, textarea {
  width: 100%; background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); color: var(--text); font-family: var(--mono);
  font-size: .88rem; padding: .65rem .9rem; outline: none;
  transition: border-color .2s, box-shadow .2s; appearance: none; -webkit-appearance: none;
}
input[type="number"] { appearance: textfield; -moz-appearance: textfield; }
input::-webkit-outer-spin-button, input::-webkit-inner-spin-button { -webkit-appearance: none; }
input:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(240,192,64,.1); }
input.invalid { border-color: var(--danger); box-shadow: 0 0 0 3px rgba(240,85,85,.1); }

.select-wrap { position: relative; }
.select-wrap::after { content:'▾'; position:absolute; right:.9rem; top:50%; transform:translateY(-50%); color:var(--muted); pointer-events:none; font-size:.78rem; }
select option { background: #1e2026; }
.field-hint { font-size: .66rem; color: var(--muted); margin-top: .28rem; }

/* Amount preview */
.amount-preview { display: flex; justify-content: space-between; align-items: center; background: rgba(61,214,140,.07); border: 1px solid rgba(61,214,140,.2); border-radius: var(--radius); padding: .75rem 1rem; margin-bottom: 1.2rem; }
.amount-label { font-size: .72rem; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.amount-value { font-family: var(--display); font-size: 1.2rem; font-weight: 700; color: var(--accent2); }

/* ── BUTTONS ── */
.btn-primary {
  background: var(--accent); color: #0e0f11;
  font-family: var(--display); font-weight: 700; font-size: .95rem;
  padding: .75rem 1.4rem; border: none; border-radius: var(--radius);
  cursor: pointer; transition: opacity .2s, transform .1s; display: inline-block;
}
.btn-primary:hover:not(:disabled) { opacity: .9; }
.btn-primary:active:not(:disabled) { transform: scale(.99); }
.btn-primary:disabled { opacity: .4; cursor: not-allowed; }
.btn-primary.btn-full { width: 100%; text-align: center; }

.btn-secondary {
  background: var(--surface2); color: var(--text); border: 1px solid var(--border);
  font-family: var(--mono); font-size: .82rem; padding: .6rem 1.1rem;
  border-radius: var(--radius); cursor: pointer; transition: border-color .15s;
}
.btn-secondary:hover { border-color: var(--text); }

.btn-danger {
  background: rgba(240,85,85,.15); color: var(--danger); border: 1px solid rgba(240,85,85,.3);
  font-family: var(--mono); font-size: .82rem; padding: .6rem 1.1rem;
  border-radius: var(--radius); cursor: pointer; transition: background .15s;
}
.btn-danger:hover { background: rgba(240,85,85,.25); }

.btn-sm {
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text); font-family: var(--mono); font-size: .76rem;
  padding: .4rem .85rem; border-radius: var(--radius); cursor: pointer;
  transition: border-color .15s, color .15s;
}
.btn-sm:hover { border-color: var(--accent); color: var(--accent); }

.btn-icon {
  background: none; border: 1px solid var(--border); border-radius: 4px;
  color: var(--muted); font-size: .82rem; padding: .2rem .5rem; cursor: pointer;
  transition: color .15s, border-color .15s;
}
.btn-icon.edit:hover   { color: var(--accent);  border-color: var(--accent); }
.btn-icon.danger:hover { color: var(--danger);  border-color: var(--danger); }

/* ── ALERTS ── */
.alert { padding: .8rem 1rem; border-radius: var(--radius); font-size: .82rem; margin-top: 1rem; border-left: 3px solid; }
.alert.success { background: rgba(61,214,140,.08); border-color: var(--accent2); color: var(--accent2); }
.alert.error   { background: rgba(240,85,85,.08);  border-color: var(--danger);  color: var(--danger); }
.alert.warning { background: rgba(240,144,64,.08); border-color: var(--warning); color: var(--warning); }

/* ── TABLE ── */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; font-size: .78rem; }
th { background: var(--surface); padding: .6rem .9rem; text-align: left; font-size: .62rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); border-bottom: 1px solid var(--border); white-space: nowrap; }
td { padding: .6rem .9rem; border-bottom: 1px solid rgba(42,45,53,.6); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255,255,255,.02); }
.muted { color: var(--muted); }
.sm    { font-size: .74rem; }
.action-cell { white-space: nowrap; }

/* ── BADGES ── */
.badge { display: inline-block; padding: .18rem .5rem; border-radius: 3px; font-size: .68rem; white-space: nowrap; }
.qty-chip { display: inline-flex; align-items: center; justify-content: center; min-width: 26px; padding: .15rem .45rem; border-radius: 4px; background: rgba(240,192,64,.15); color: var(--accent); font-weight: 500; }

/* payment plan */
.badge-full { background: rgba(61,214,140,.15); color: var(--accent2); }
.badge-2m   { background: rgba(240,192,64,.15);  color: var(--accent); }
.badge-3m   { background: rgba(167,143,255,.2);  color: var(--purple); }
/* courier */
.badge-uber { background: rgba(255,255,255,.07); color: var(--text); }
.badge-tcg  { background: rgba(96,184,240,.15);  color: var(--info); }
.badge-self { background: rgba(240,85,85,.12);   color: #f08888; }
/* follow-up status */
.badge-upcoming   { background: rgba(96,184,240,.15);  color: var(--info); }
.badge-due        { background: rgba(240,192,64,.15);  color: var(--accent); }
.badge-overdue    { background: rgba(240,85,85,.15);   color: var(--danger); }
.badge-completed  { background: rgba(61,214,140,.15);  color: var(--accent2); }
.badge-na         { background: rgba(107,114,128,.15); color: var(--muted); }
/* payment status */
.badge-pending    { background: rgba(240,192,64,.1);   color: var(--accent); }

/* ── FILTERS ── */
.table-filters { display: flex; gap: .6rem; flex-wrap: wrap; }
.filter-select { background: var(--surface2); border: 1px solid var(--border); border-radius: var(--radius); color: var(--text); font-family: var(--mono); font-size: .75rem; padding: .35rem .7rem; outline: none; appearance: none; cursor: pointer; }

/* ── REFRESH ROW ── */
.refresh-row { display: flex; align-items: center; gap: .6rem; }
.refresh-meta { font-size: .7rem; color: var(--muted); }

/* ── EMPTY STATE ── */
.empty-state { text-align: center; padding: 3rem 1rem; color: var(--muted); font-size: .84rem; }
.empty-state.error { color: var(--danger); }

/* ── MODALS ── */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.65); display: flex; align-items: center; justify-content: center; z-index: 200; padding: 1rem; }
.modal { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; width: 100%; max-width: 520px; }
.modal-sm { max-width: 380px; }
.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 1.2rem 1.5rem; border-bottom: 1px solid var(--border); }
.modal-header h3 { font-family: var(--display); font-size: 1rem; font-weight: 700; }
.modal-close { background: none; border: none; color: var(--muted); font-size: 1.1rem; cursor: pointer; }
.modal form, .modal > p { padding: 1.5rem; }
.modal-footer { display: flex; gap: .7rem; justify-content: flex-end; padding: 1rem 1.5rem; border-top: 1px solid var(--border); }

/* ── LOGIN PAGE ── */
.login-body { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 100vh; }
.login-wrap { width: 100%; max-width: 380px; padding: 1.5rem; }
.login-brand { font-family: var(--display); font-weight: 800; font-size: 1.2rem; color: var(--accent); text-align: center; margin-bottom: 1.5rem; }
.login-card { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 2rem; }
.login-card h1 { font-family: var(--display); font-size: 1.4rem; margin-bottom: 1.5rem; }
.login-footer { text-align: center; font-size: .7rem; color: var(--muted); margin-top: 1.2rem; }

/* ── RESPONSIVE ── */
@media (max-width: 640px) {
  .form-row      { grid-template-columns: 1fr; }
  .topnav        { padding: 0 1rem; gap: .8rem; }
  .nav-links     { display: none; }
  .container     { padding: 1.5rem 1rem; }
  .stat-grid     { grid-template-columns: 1fr 1fr; }
}