/* ============================================================
   main.css — PriceKeeper Premium POS
   Aesthetic: Dark terminal meets Lagos night market
   ============================================================ */

/* ── Reset & tokens ────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:      #080a0f;
  --s1:      #0e1118;
  --s2:      #141820;
  --s3:      #1c2130;
  --s4:      #242a3a;
  --border:  #252d40;
  --border2: #2e3850;
  --accent:  #f5c842;
  --accent2: #ffd96a;
  --a2:      #ff6b35;
  --blue:    #4d8ef0;
  --blue2:   #7aabff;
  --green:   #2ecc71;
  --green2:  #52e28d;
  --red:     #ff4757;
  --text:    #dde3f5;
  --text2:   #b0bcd8;
  --muted:   #5a6480;
  --fh: 'Syne', sans-serif;
  --fb: 'DM Mono', monospace;

  /* Glow effects */
  --glow-accent: 0 0 20px rgba(245,200,66,.15);
  --glow-green:  0 0 20px rgba(46,204,113,.15);
  --glow-blue:   0 0 20px rgba(77,142,240,.15);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0,0,0,.4);
  --shadow-md: 0 4px 16px rgba(0,0,0,.5);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.6);
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--fb);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overscroll-behavior: none;
  -webkit-font-smoothing: antialiased;
}

/* Subtle grid texture on bg */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(245,200,66,.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245,200,66,.015) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

/* ── Header ────────────────────────────────────────────────── */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8,10,15,.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  box-shadow: 0 1px 0 var(--border), var(--shadow-sm);
}

/* Accent line under header */
header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: .3;
}

.logo {
  font-family: var(--fh);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--accent);
  letter-spacing: -1px;
  display: flex;
  align-items: center;
  padding: 14px 0;
  gap: 2px;
}
.logo em {
  color: var(--text);
  font-style: normal;
  opacity: .7;
}

.auth-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--s2);
  border: 1px solid var(--border2);
  border-radius: 24px;
  padding: 7px 16px;
  margin: auto 0;
  font-family: var(--fh);
  font-weight: 700;
  font-size: .73rem;
  color: var(--text2);
  cursor: pointer;
  transition: all .2s;
  letter-spacing: .3px;
}
.auth-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(245,200,66,.06);
}
.auth-btn img {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: none;
  border: 1.5px solid var(--accent);
}

/* ── Tab nav ───────────────────────────────────────────────── */
.tab-nav {
  display: flex;
  border-bottom: 1px solid var(--border);
  background: var(--s1);
  position: sticky;
  top: 53px;
  z-index: 90;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 0 4px;
}
.tab-nav::-webkit-scrollbar { display: none; }

.tab-btn {
  flex-shrink: 0;
  padding: 13px 22px;
  font-family: var(--fh);
  font-weight: 700;
  font-size: .76rem;
  color: var(--muted);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: color .2s, border-color .2s;
  letter-spacing: .5px;
  position: relative;
}
.tab-btn:hover { color: var(--text2); }
.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* Active tab glow dot */
.tab-btn.active::before {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

/* ── Pages ─────────────────────────────────────────────────── */
.page { display: none; }
.page.active { display: block; }
.wrap { max-width: 780px; margin: 0 auto; padding: 24px 16px 100px; }

/* ── Sync bar ──────────────────────────────────────────────── */
.sync-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .69rem;
  color: var(--muted);
  margin-bottom: 20px;
  padding: 8px 14px;
  background: var(--s1);
  border: 1px solid var(--border);
  border-radius: 8px;
  letter-spacing: .3px;
}
.sync-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--muted);
  flex-shrink: 0;
}
.sync-dot.online  { background: var(--green); box-shadow: 0 0 6px var(--green); }
.sync-dot.offline { background: var(--a2);    box-shadow: 0 0 6px var(--a2); }

/* ── Summary cards ─────────────────────────────────────────── */
.sum-row {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 10px;
  margin-bottom: 24px;
}
@media(max-width:500px){ .sum-row { grid-template-columns: repeat(2,1fr); } }

.sc {
  background: var(--s1);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  position: relative;
  overflow: hidden;
  transition: border-color .2s;
}
.sc::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--border2), transparent);
}
.sc:hover { border-color: var(--border2); }

.sc .sl {
  font-size: .58rem;
  color: var(--muted);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 6px;
  font-family: var(--fb);
}
.sc .sv {
  font-family: var(--fh);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--text);
}
.sc .sv.y { color: var(--accent); }
.sc .sv.g { color: var(--green); }
.sc .sv.o { color: var(--a2); }

/* ── Form inputs (shared) ──────────────────────────────────── */
input[type=text], input[type=number], select, textarea {
  background: var(--s2);
  border: 1px solid var(--border2);
  border-radius: 9px;
  padding: 10px 13px;
  font-family: var(--fb);
  font-size: .85rem;
  color: var(--text);
  outline: none;
  width: 100%;
  transition: border-color .2s, box-shadow .2s, background .2s;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(245,200,66,.08);
  background: var(--s3);
}
input::placeholder, textarea::placeholder { color: var(--muted); }
select option { background: var(--s2); }
textarea { resize: none; height: 60px; font-size: .81rem; }

/* ── Form grids ────────────────────────────────────────────── */
.fg  { display: grid; grid-template-columns: 1fr 1fr;         gap: 10px; margin-bottom: 10px; }
.fg3 { display: grid; grid-template-columns: 2fr 1fr 1fr;     gap: 10px; margin-bottom: 10px; }
.fg4 { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 10px; margin-bottom: 10px; }
@media(max-width:500px){ .fg, .fg3, .fg4 { grid-template-columns: 1fr; } }
.field { display: flex; flex-direction: column; gap: 5px; }
label.lbl {
  font-size: .62rem;
  color: var(--muted);
  letter-spacing: 1.2px;
  text-transform: uppercase;
  font-family: var(--fb);
}
.divider { border: none; border-top: 1px dashed var(--border2); margin: 14px 0; }

/* ── Buttons ───────────────────────────────────────────────── */
.btn-add {
  width: 100%;
  background: var(--accent);
  color: #080a0f;
  border: none;
  border-radius: 10px;
  padding: 14px;
  font-family: var(--fh);
  font-weight: 800;
  font-size: .92rem;
  cursor: pointer;
  transition: opacity .2s, transform .1s, box-shadow .2s;
  letter-spacing: .3px;
}
.btn-add:hover {
  opacity: .9;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(245,200,66,.3);
}
.btn-add:active { transform: translateY(0); }

.btn-secondary {
  background: var(--s2);
  border: 1px solid var(--border2);
  border-radius: 9px;
  padding: 9px 15px;
  font-family: var(--fh);
  font-weight: 700;
  font-size: .8rem;
  color: var(--text2);
  cursor: pointer;
  transition: all .15s;
}
.btn-secondary:hover {
  background: var(--s3);
  border-color: var(--accent);
  color: var(--accent);
}

/* ── Section label ─────────────────────────────────────────── */
.sec-lbl {
  font-family: var(--fh);
  font-size: .61rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.badge {
  background: var(--s2);
  border: 1px solid var(--border2);
  padding: 3px 10px;
  border-radius: 20px;
  font-size: .62rem;
  color: var(--muted);
  font-family: var(--fb);
}

/* ── Toggle switch ─────────────────────────────────────────── */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 13px;
  background: var(--s2);
  border: 1px solid var(--border2);
  border-radius: 9px;
  margin-bottom: 10px;
}
.toggle-row label.lbl { margin: 0; font-size: .74rem; color: var(--text2); letter-spacing: 0; text-transform: none; }
.toggle { position: relative; width: 38px; height: 22px; flex-shrink: 0; }
.toggle input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; inset: 0; background: var(--s4); border-radius: 22px; cursor: pointer; transition: background .2s; border: 1px solid var(--border2); }
.slider::before { content: ''; position: absolute; width: 15px; height: 15px; border-radius: 50%; background: var(--muted); top: 3px; left: 3px; transition: transform .2s, background .2s; }
.toggle input:checked + .slider { background: rgba(245,200,66,.12); border-color: rgba(245,200,66,.3); }
.toggle input:checked + .slider::before { transform: translateX(16px); background: var(--accent); }

/* ── Modal ─────────────────────────────────────────────────── */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.82);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 18px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s;
}
.overlay.open { opacity: 1; pointer-events: all; }

.modal {
  background: var(--s1);
  border: 1px solid var(--border2);
  border-radius: 18px;
  padding: 24px;
  width: 100%;
  max-width: 440px;
  transform: scale(.96) translateY(8px);
  transition: transform .25s cubic-bezier(.34,1.56,.64,1);
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.modal::before {
  content: '';
  position: absolute;
  top: 0; left: 20%; right: 20%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: .4;
}
.overlay.open .modal { transform: scale(1) translateY(0); }
.modal-title { font-family: var(--fh); font-weight: 800; font-size: 1rem; margin-bottom: 18px; color: var(--text); }
.modal-btns { display: flex; gap: 10px; margin-top: 16px; }
.btn-cancel {
  flex: 1;
  background: var(--s2);
  border: 1px solid var(--border2);
  border-radius: 10px;
  padding: 11px;
  font-family: var(--fh);
  font-weight: 700;
  font-size: .85rem;
  color: var(--muted);
  cursor: pointer;
  transition: all .15s;
}
.btn-cancel:hover { background: var(--s3); color: var(--text2); }
.btn-save {
  flex: 2;
  background: var(--accent);
  color: #080a0f;
  border: none;
  border-radius: 10px;
  padding: 11px;
  font-family: var(--fh);
  font-weight: 800;
  font-size: .85rem;
  cursor: pointer;
  transition: opacity .15s, box-shadow .2s;
}
.btn-save:hover { opacity: .88; box-shadow: 0 4px 14px rgba(245,200,66,.3); }

/* ── Filter bar ────────────────────────────────────────────── */
.filter-bar { display: flex; gap: 8px; margin-bottom: 16px; flex-wrap: wrap; align-items: center; }
.search-wrap { position: relative; flex: 1; min-width: 150px; }
.search-wrap svg { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--muted); }
#searchInput { padding-left: 36px; background: var(--s1); border: 1px solid var(--border2); border-radius: 10px; }
#searchInput:focus { border-color: var(--accent); }
.cat-filter {
  background: var(--s1);
  border: 1px solid var(--border2);
  border-radius: 10px;
  padding: 10px 12px;
  font-family: var(--fb);
  font-size: .8rem;
  color: var(--text2);
  outline: none;
  cursor: pointer;
}
.cat-filter:focus { border-color: var(--accent); }

/* ── Empty state ───────────────────────────────────────────── */
.empty { text-align: center; padding: 50px 20px; color: var(--muted); }
.empty .ico { font-size: 2.6rem; margin-bottom: 14px; opacity: .6; }
.empty p { font-family: var(--fh); font-size: .86rem; line-height: 1.8; }

/* ── Profit preview strip ──────────────────────────────────── */
.preview {
  background: var(--s2);
  border: 1px solid var(--border2);
  border-radius: 9px;
  padding: 11px 14px;
  margin-bottom: 14px;
  min-height: 40px;
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  font-size: .79rem;
  color: var(--muted);
}
.preview strong { font-family: var(--fh); font-size: .92rem; }
.pos { color: var(--green); }
.neg { color: var(--red); }

/* ── Toast ─────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(16px);
  background: var(--s2);
  color: var(--text);
  border: 1px solid var(--border2);
  padding: 10px 22px;
  border-radius: 30px;
  font-family: var(--fh);
  font-weight: 700;
  font-size: .78rem;
  opacity: 0;
  transition: opacity .2s, transform .25s cubic-bezier(.34,1.56,.64,1);
  z-index: 9999;
  pointer-events: none;
  white-space: nowrap;
  box-shadow: var(--shadow-md);
  letter-spacing: .3px;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.ok  { border-color: rgba(46,204,113,.5); color: var(--green2); background: rgba(46,204,113,.08); }
.toast.err { border-color: rgba(255,71,87,.5);  color: var(--red);    background: rgba(255,71,87,.08); }

/* ── Sub-tab nav ───────────────────────────────────────────── */
.sub-tab-nav {
  display: flex;
  border-bottom: 1px solid var(--border);
  background: var(--s2);
  border-radius: 10px 10px 0 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.sub-tab-nav::-webkit-scrollbar { display: none; }
.sub-tab-btn {
  flex-shrink: 0;
  padding: 11px 18px;
  font-family: var(--fh);
  font-weight: 700;
  font-size: .74rem;
  color: var(--muted);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: color .2s, border-color .2s;
  letter-spacing: .4px;
}
.sub-tab-btn:hover { color: var(--text2); }
.sub-tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ── Sub pages ─────────────────────────────────────────────── */
.sub-page { display: none; }
.sub-page.active { display: block; }

/* ── Report summary ────────────────────────────────────────── */
.report-summary { grid-template-columns: repeat(5, 1fr); }
@media(max-width:600px){ .report-summary { grid-template-columns: repeat(2, 1fr); } }

/* ── Scrollbar styling ─────────────────────────────────────── */
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }

/* ── Animations ────────────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes slideIn {
  from { opacity: 0; transform: translateX(12px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: .5; }
}

/* Buy Unit Selector */
.buy-unit-group {
  display: flex;
  gap: 8px;
  background: var(--s2);
  border: 1px solid var(--border2);
  border-radius: 10px;
  padding: 6px;
}

.buy-unit-btn {
  flex: 1;
  padding: 10px 12px;
  border-radius: 8px;
  text-align: center;
  cursor: pointer;
  font-family: var(--fh);
  font-weight: 700;
  font-size: 0.82rem;
  transition: all 0.2s;
  border: 2px solid transparent;
}

.buy-unit-btn input[type="radio"] {
  display: none;
}

.buy-unit-btn span {
  display: block;
}

.buy-unit-btn.active {
  background: var(--accent);
  color: #080a0f;
  border-color: var(--accent);
}

.buy-unit-btn:hover:not(.active) {
  background: var(--s3);
  border-color: var(--accent);
}