/* ============================================================
   NEXMART — style.css  (Task 7 — Full Stack Edition)
   Includes all Task 6 styles + Auth Modal styles
   ============================================================ */

/* ── Design tokens ─────────────────────────────────────────── */
:root {
  --bg          : #0a0a0f;
  --surface     : #111118;
  --surface-2   : #1a1a24;
  --border      : rgba(255,255,255,.07);
  --accent      : #7c5cfc;
  --accent-2    : #e040fb;
  --accent-glow : rgba(124,92,252,.35);
  --text        : #f0f0f8;
  --text-dim    : #9090b0;
  --text-muted  : #5a5a7a;
  --success     : #22c55e;
  --warning     : #f59e0b;
  --error       : #ef4444;
  --radius      : 14px;
  --radius-sm   : 8px;
  --shadow      : 0 8px 32px rgba(0,0,0,.45);
  --trans       : .22s cubic-bezier(.4,0,.2,1);
}

/* ── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--text); font-family: 'DM Sans', sans-serif; min-height: 100vh; line-height: 1.6; }
img  { display: block; max-width: 100%; }
a    { cursor: pointer; color: var(--accent); text-decoration: underline; }

/* ── NAV ────────────────────────────────────────────────────── */
nav {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 32px; height: 64px;
  background: rgba(10,10,15,.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.logo { font-family: 'Syne', sans-serif; font-weight: 800; font-size: 22px; letter-spacing: -0.5px; }
.logo span { color: var(--accent); }
.nav-right { display: flex; align-items: center; gap: 10px; }

#cart-btn, .admin-toggle-btn, .auth-nav-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--surface-2);
  color: var(--text); font-size: 13px; font-weight: 500;
  cursor: pointer; transition: var(--trans);
}
#cart-btn:hover, .admin-toggle-btn:hover, .auth-nav-btn:hover {
  background: var(--accent); border-color: var(--accent); color: #fff;
}
#cart-count {
  background: var(--accent); color: #fff;
  border-radius: 99px; padding: 0 7px;
  font-size: 11px; font-weight: 700; min-width: 20px; text-align: center;
}
.auth-nav-btn { background: rgba(124,92,252,.15); border-color: rgba(124,92,252,.4); color: var(--accent); }

/* ── HERO ───────────────────────────────────────────────────── */
.hero {
  text-align: center; padding: 80px 20px 60px;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(124,92,252,.15), transparent);
}
.hero-tag {
  display: inline-block; padding: 6px 14px;
  border: 1px solid rgba(124,92,252,.4); border-radius: 99px;
  font-size: 12px; color: var(--accent); margin-bottom: 24px; letter-spacing: 1px;
}
.hero h1 { font-family: 'Syne', sans-serif; font-size: clamp(36px,6vw,72px); font-weight: 800; line-height: 1.1; margin-bottom: 16px; }
.grad { background: linear-gradient(135deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero p { font-size: 18px; color: var(--text-dim); margin-bottom: 20px; }
.task6-badge {
  display: inline-block; margin-top: 8px;
  padding: 8px 20px; border-radius: 99px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  font-size: 12px; font-weight: 600; letter-spacing: .5px;
}

/* ── AUTH MODAL ─────────────────────────────────────────────── */
.auth-modal {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 20px; padding: 36px; width: 100%; max-width: 420px;
  position: relative; box-shadow: 0 20px 60px rgba(0,0,0,.6);
  animation: slideUp .25s ease;
}
.auth-tabs {
  display: flex; gap: 8px; margin-bottom: 28px;
  border-bottom: 1px solid var(--border); padding-bottom: 12px;
}
.auth-tab {
  padding: 8px 20px; border-radius: var(--radius-sm);
  border: none; background: transparent;
  color: var(--text-dim); font-size: 14px; font-weight: 500;
  cursor: pointer; transition: var(--trans);
}
.auth-tab.active { background: var(--accent); color: #fff; }
.auth-title { font-family: 'Syne', sans-serif; font-size: 24px; font-weight: 700; margin-bottom: 6px; }
.auth-sub   { font-size: 14px; color: var(--text-dim); margin-bottom: 24px; }
.auth-field { margin-bottom: 16px; }
.auth-field label { display: block; font-size: 12px; font-weight: 600; color: var(--text-dim); margin-bottom: 6px; text-transform: uppercase; letter-spacing: .5px; }
.auth-field input {
  width: 100%; padding: 10px 14px;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text);
  font-size: 14px; font-family: inherit; transition: var(--trans);
}
.auth-field input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.auth-error { color: var(--error); font-size: 13px; margin-bottom: 12px; min-height: 18px; }
.auth-submit-btn {
  width: 100%; padding: 12px; border-radius: var(--radius-sm);
  border: none; background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; font-size: 15px; font-weight: 600;
  cursor: pointer; transition: var(--trans); margin-bottom: 16px;
}
.auth-submit-btn:hover { opacity: .9; transform: translateY(-1px); }
.auth-switch { font-size: 13px; color: var(--text-dim); text-align: center; }
.auth-switch a { color: var(--accent); cursor: pointer; text-decoration: underline; }

/* ── ADMIN PANEL ───────────────────────────────────────────── */
.admin-panel {
  max-height: 0; overflow: hidden;
  transition: max-height .4s ease, opacity .3s ease;
  opacity: 0;
}
.admin-panel.open { max-height: 400px; opacity: 1; }
.admin-inner { background: var(--surface-2); border-bottom: 1px solid var(--border); padding: 24px 32px; }
.admin-header { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 20px; }
.admin-label  { font-family: 'Syne',sans-serif; font-size: 16px; font-weight: 700; }
.admin-sub    { font-size: 13px; color: var(--text-dim); }
.admin-close-btn { background: none; border: 1px solid var(--border); border-radius: 8px; color: var(--text-dim); cursor: pointer; padding: 6px 10px; }
.admin-form-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-end; }
.admin-field  { display: flex; flex-direction: column; gap: 4px; flex: 1; min-width: 160px; }
.admin-field label { font-size: 11px; font-weight: 600; color: var(--text-dim); text-transform: uppercase; letter-spacing: .5px; }
.admin-field input, .admin-field select {
  padding: 9px 12px; background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text); font-size: 13px; font-family: inherit;
}
.admin-field input:focus, .admin-field select:focus { outline: none; border-color: var(--accent); }
.admin-add-btn {
  padding: 10px 22px; background: linear-gradient(135deg,var(--accent),var(--accent-2));
  border: none; border-radius: var(--radius-sm); color: #fff; font-weight: 600;
  font-size: 14px; cursor: pointer; white-space: nowrap; transition: var(--trans);
}
.admin-add-btn:hover { opacity: .9; transform: translateY(-1px); }

/* ── SPINNER ──────────────────────────────────────────────── */
.spinner-wrap {
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 16px; padding: 80px 20px;
  color: var(--text-dim);
}
.spinner-ring {
  width: 44px; height: 44px; border-radius: 50%;
  border: 3px solid var(--border); border-top-color: var(--accent);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── ERROR BANNER ─────────────────────────────────────────── */
.error-banner {
  display: flex; align-items: center; gap: 16px;
  background: rgba(239,68,68,.1); border: 1px solid rgba(239,68,68,.3);
  border-radius: var(--radius); padding: 20px 32px; margin: 24px 32px;
}
.error-icon { font-size: 28px; }
.error-banner strong { display: block; margin-bottom: 4px; }
.error-banner p { font-size: 13px; color: var(--text-dim); }
.retry-btn {
  margin-left: auto; padding: 8px 18px; border-radius: var(--radius-sm);
  border: 1px solid var(--error); background: transparent;
  color: var(--error); cursor: pointer; font-weight: 600; transition: var(--trans);
}
.retry-btn:hover { background: var(--error); color: #fff; }

/* ── CONTROLS ─────────────────────────────────────────────── */
.controls {
  display: flex; flex-wrap: wrap; align-items: center; gap: 12px;
  padding: 16px 32px; border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.search-wrap {
  display: flex; align-items: center; gap: 10px;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 0 12px; flex: 1; min-width: 200px;
}
.search-icon { color: var(--text-muted); }
.search-wrap input {
  background: none; border: none; color: var(--text);
  font-family: inherit; font-size: 14px; width: 100%; padding: 9px 0;
}
.search-wrap input:focus { outline: none; }
.ctrl-select {
  padding: 10px 12px; background: var(--surface-2); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text); font-family: inherit; font-size: 13px;
}
.ctrl-select:focus { outline: none; border-color: var(--accent); }
.price-range-wrap { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-dim); }
.price-range-wrap input[type=range] { accent-color: var(--accent); cursor: pointer; }
.cat-pills { display: flex; flex-wrap: wrap; gap: 6px; }
.cat-pill {
  padding: 5px 14px; border-radius: 99px; font-size: 12px; font-weight: 500;
  border: 1px solid var(--border); background: transparent;
  color: var(--text-dim); cursor: pointer; transition: var(--trans);
}
.cat-pill.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.cat-pill:hover:not(.active) { border-color: var(--accent); color: var(--accent); }

/* ── RESULTS BAR ──────────────────────────────────────────── */
.results-bar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 32px; font-size: 13px; color: var(--text-dim);
  border-bottom: 1px solid var(--border);
}

/* ── PRODUCT GRID ─────────────────────────────────────────── */
.grid-wrap { padding: 32px; }
#product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; cursor: pointer;
  transition: var(--trans);
  display: flex; flex-direction: column;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(124,92,252,.2); border-color: rgba(124,92,252,.3); }
.card-img-wrap { position: relative; aspect-ratio: 1; overflow: hidden; background: var(--surface-2); }
.card-img-wrap img { width: 100%; height: 100%; object-fit: contain; padding: 12px; transition: transform .4s ease; }
.card:hover .card-img-wrap img { transform: scale(1.06); }
.badge {
  position: absolute; top: 10px; left: 10px;
  padding: 3px 9px; border-radius: 6px; font-size: 10px; font-weight: 700; letter-spacing: .5px;
}
.badge-hot  { background: #ef4444; color: #fff; }
.badge-new  { background: #22c55e; color: #fff; }
.badge-sale { background: #f59e0b; color: #000; }
.card-body { padding: 14px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.card-cat   { font-size: 10px; text-transform: uppercase; letter-spacing: 1px; color: var(--accent); font-weight: 600; }
.card-title { font-size: 14px; font-weight: 600; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-stars { font-size: 11px; color: #f59e0b; }
.card-reviews { color: var(--text-muted); font-size: 11px; }
.card-pricing { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; margin-top: auto; padding-top: 6px; }
.card-price    { font-family: 'Syne',sans-serif; font-size: 18px; font-weight: 700; }
.card-original { font-size: 12px; color: var(--text-muted); text-decoration: line-through; }
.card-discount { font-size: 11px; color: var(--success); font-weight: 600; }
.card-actions { display: flex; gap: 6px; margin-top: 8px; }
.card-add-btn {
  flex: 1; padding: 9px; border-radius: var(--radius-sm);
  border: 1px solid var(--accent); background: rgba(124,92,252,.12);
  color: var(--accent); font-size: 12px; font-weight: 600;
  cursor: pointer; transition: var(--trans);
}
.card-add-btn:hover { background: var(--accent); color: #fff; }
.card-del-btn {
  padding: 9px 12px; border-radius: var(--radius-sm);
  border: 1px solid rgba(239,68,68,.3); background: rgba(239,68,68,.08);
  color: #ef4444; cursor: pointer; font-size: 13px; transition: var(--trans);
}
.card-del-btn:hover { background: #ef4444; color: #fff; }

/* ── EMPTY STATE ──────────────────────────────────────────── */
.empty-state { grid-column: 1/-1; text-align: center; padding: 80px 20px; color: var(--text-dim); }
.empty-icon  { font-size: 48px; margin-bottom: 12px; }

/* ── PAGINATION ───────────────────────────────────────────── */
#pagination { display: flex; justify-content: center; gap: 6px; padding: 24px 32px 40px; flex-wrap: wrap; }
#pagination button {
  padding: 8px 16px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--surface);
  color: var(--text-dim); cursor: pointer; font-family: inherit; transition: var(--trans);
}
#pagination button.active { background: var(--accent); border-color: var(--accent); color: #fff; }
#pagination button:hover:not(.active) { border-color: var(--accent); color: var(--accent); }

/* ── MODAL BACKDROP ───────────────────────────────────────── */
.modal-backdrop {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(0,0,0,.75); backdrop-filter: blur(6px);
  display: none; align-items: center; justify-content: center;
  padding: 20px;
}

/* ── PRODUCT MODAL ────────────────────────────────────────── */
.modal {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 20px; overflow: hidden; width: 100%; max-width: 800px;
  display: grid; grid-template-columns: 1fr 1fr;
  box-shadow: var(--shadow); animation: slideUp .25s ease;
}
@media (max-width: 580px) { .modal { grid-template-columns: 1fr; } }
.modal-img { background: var(--surface-2); display: flex; align-items: center; justify-content: center; aspect-ratio: 1; }
.modal-img img { max-height: 320px; object-fit: contain; padding: 24px; }
.modal-info { padding: 32px; display: flex; flex-direction: column; gap: 10px; position: relative; overflow-y: auto; max-height: 480px; }
.modal-close { position: absolute; top: 16px; right: 16px; background: var(--surface-2); border: 1px solid var(--border); border-radius: 8px; color: var(--text-dim); cursor: pointer; width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; }
.modal-cat   { font-size: 11px; text-transform: uppercase; letter-spacing: 1px; color: var(--accent); font-weight: 600; }
.modal-title { font-family: 'Syne',sans-serif; font-size: 22px; font-weight: 700; line-height: 1.3; }
.modal-price { font-family: 'Syne',sans-serif; font-size: 28px; font-weight: 800; color: var(--accent); }
.modal-desc  { font-size: 14px; color: var(--text-dim); line-height: 1.7; }
.stars       { color: #f59e0b; font-size: 14px; }
.qty-row { display: flex; align-items: center; gap: 12px; margin: 4px 0; }
.qty-btn {
  width: 36px; height: 36px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--surface-2);
  color: var(--text); font-size: 18px; cursor: pointer; transition: var(--trans);
}
.qty-btn:hover { background: var(--accent); border-color: var(--accent); }
.qty-val { font-size: 18px; font-weight: 700; min-width: 30px; text-align: center; }
.modal-add-btn {
  padding: 13px; border-radius: var(--radius-sm); border: none;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; font-size: 15px; font-weight: 600; cursor: pointer; transition: var(--trans);
}
.modal-add-btn:hover { opacity: .9; transform: translateY(-1px); }
.modal-delete-btn {
  padding: 13px 18px; border-radius: var(--radius-sm);
  border: 1px solid rgba(239,68,68,.4); background: rgba(239,68,68,.1);
  color: #ef4444; font-size: 16px; cursor: pointer; transition: var(--trans);
}
.modal-delete-btn:hover { background: #ef4444; color: #fff; }

/* ── CART DRAWER ──────────────────────────────────────────── */
.cart-backdrop {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(0,0,0,.6); backdrop-filter: blur(4px);
  display: none; justify-content: flex-end;
}
.cart-drawer {
  width: 100%; max-width: 400px; height: 100%;
  background: var(--surface); border-left: 1px solid var(--border);
  display: flex; flex-direction: column;
  animation: slideRight .25s ease;
}
.cart-header { display: flex; justify-content: space-between; align-items: center; padding: 20px 24px; border-bottom: 1px solid var(--border); }
.cart-header h2 { font-family: 'Syne',sans-serif; font-size: 18px; font-weight: 700; }
.cart-close { background: none; border: none; color: var(--text-dim); font-size: 18px; cursor: pointer; }
#cart-items { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.cart-item { display: flex; align-items: center; gap: 12px; background: var(--surface-2); border-radius: var(--radius-sm); padding: 10px; }
.cart-item img { width: 56px; height: 56px; object-fit: contain; border-radius: 8px; background: var(--bg); padding: 4px; }
.cart-item-info { flex: 1; }
.cart-item-title { font-size: 13px; font-weight: 500; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.cart-item-price { font-size: 13px; color: var(--accent); font-weight: 600; margin-top: 3px; }
.cart-qty-wrap  { display: flex; align-items: center; gap: 6px; font-size: 13px; }
.cart-qty-wrap button { width: 24px; height: 24px; border-radius: 6px; border: 1px solid var(--border); background: var(--bg); color: var(--text); cursor: pointer; }
.cart-item-remove { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 14px; padding: 4px; }
.cart-item-remove:hover { color: var(--error); }
.cart-empty { text-align: center; padding: 60px 20px; color: var(--text-dim); font-size: 15px; }
.cart-footer  { padding: 20px 24px; border-top: 1px solid var(--border); }
.cart-summary { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; font-size: 14px; }
.checkout-btn {
  width: 100%; padding: 14px; border-radius: var(--radius-sm); border: none;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; font-size: 16px; font-weight: 700; cursor: pointer; transition: var(--trans);
}
.checkout-btn:hover { opacity: .9; transform: translateY(-1px); }

/* ── TOAST ────────────────────────────────────────────────── */
#toast-container { position: fixed; bottom: 24px; right: 24px; z-index: 999; display: flex; flex-direction: column; gap: 8px; max-width: 320px; }
.toast {
  padding: 12px 16px; border-radius: var(--radius-sm);
  font-size: 13px; font-weight: 500; opacity: 0;
  transform: translateY(10px); transition: all .3s ease;
  box-shadow: 0 4px 16px rgba(0,0,0,.4);
}
.toast.visible { opacity: 1; transform: translateY(0); }
.toast-success { background: #14532d; border: 1px solid #22c55e; color: #86efac; }
.toast-error   { background: #450a0a; border: 1px solid #ef4444; color: #fca5a5; }
.toast-warning { background: #451a03; border: 1px solid #f59e0b; color: #fcd34d; }
.toast-info    { background: #1e1b4b; border: 1px solid var(--accent); color: #a5b4fc; }

/* ── FOOTER ───────────────────────────────────────────────── */
footer { border-top: 1px solid var(--border); padding: 32px; text-align: center; }
.footer-inner { max-width: 600px; margin: 0 auto; }
.footer-logo  { font-family: 'Syne',sans-serif; font-size: 20px; font-weight: 800; margin-bottom: 8px; }
.footer-logo span { color: var(--accent); }
footer p  { font-size: 12px; color: var(--text-muted); margin-bottom: 12px; }
.footer-links { display: flex; justify-content: center; flex-wrap: wrap; gap: 16px; font-size: 12px; color: var(--text-dim); }

/* ── ANIMATIONS ───────────────────────────────────────────── */
@keyframes slideUp    { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideRight { from { opacity: 0; transform: translateX(40px); } to { opacity: 1; transform: translateX(0); } }

/* ── RESPONSIVE ───────────────────────────────────────────── */
@media (max-width: 600px) {
  nav        { padding: 0 16px; }
  .hero      { padding: 60px 16px 40px; }
  .controls  { padding: 12px 16px; }
  .grid-wrap { padding: 16px; }
  .admin-inner { padding: 16px; }
  .modal-info  { padding: 20px; max-height: 60vh; }
  #toast-container { left: 16px; right: 16px; bottom: 16px; max-width: none; }
}