/* ============================================================
   Internal Procurement Tracker — Main Stylesheet
   Aesthetic: Industrial Precision — dark steel tones, amber
   accents, monospace confidence
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans:wght@300;400;500;600;700&display=swap');

/* ============================================================ Variables */
:root {
  --bg-0:         #0d0f12;
  --bg-1:         #13161b;
  --bg-2:         #1a1e25;
  --bg-3:         #222730;
  --bg-4:         #2a3040;
  --border:       #2e3545;
  --border-light: #3d4758;

  --text-0:       #eef0f4;
  --text-1:       #b8bfcc;
  --text-2:       #7a8494;
  --text-3:       #4e5668;

  --amber:        #f5a623;
  --amber-dim:    #c47d10;
  --amber-glow:   rgba(245, 166, 35, 0.12);

  --green:        #3dd68c;
  --green-dim:    #25a060;
  --green-glow:   rgba(61, 214, 140, 0.10);

  --red:          #f55555;
  --red-dim:      #c42222;
  --red-glow:     rgba(245, 85, 85, 0.10);

  --blue:         #4d9de0;
  --blue-dim:     #2570b0;

  --radius-sm:    4px;
  --radius:       8px;
  --radius-lg:    12px;

  --font-sans:    'IBM Plex Sans', system-ui, sans-serif;
  --font-mono:    'IBM Plex Mono', 'Courier New', monospace;

  --transition:   0.18s ease;
  --shadow:       0 4px 20px rgba(0,0,0,0.35);
  --shadow-sm:    0 2px 8px rgba(0,0,0,0.25);
}

/* ============================================================ Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg-0);
  color: var(--text-0);
  line-height: 1.6;
  min-height: 100vh;
}
a { color: var(--amber); text-decoration: none; }
a:hover { color: var(--text-0); }
img { max-width: 100%; display: block; }
input, textarea, select { font-family: inherit; }
button { cursor: pointer; font-family: inherit; }

/* ============================================================ Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-1); }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; }

/* ============================================================ Layout */
.app { display: flex; flex-direction: column; min-height: 100vh; }

/* ---- Topnav */
.topnav {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; gap: 16px;
  padding: 0 24px; height: 56px;
  background: var(--bg-1);
  border-bottom: 1px solid var(--border);
}
.topnav__brand {
  font-family: var(--font-mono);
  font-weight: 600; font-size: 0.85rem;
  color: var(--amber);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}
.topnav__brand span { color: var(--text-2); }
.topnav__sep { flex: 1; }
.topnav__actions { display: flex; align-items: center; gap: 8px; }

/* ---- Content area */
.content { flex: 1; padding: 32px 24px; max-width: 1400px; margin: 0 auto; width: 100%; }
.content--narrow { max-width: 900px; }

/* ============================================================ Login */
.login-page {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh;
  background: var(--bg-0);
  background-image:
    repeating-linear-gradient(0deg, transparent, transparent 39px, var(--border) 39px, var(--border) 40px),
    repeating-linear-gradient(90deg, transparent, transparent 39px, var(--border) 39px, var(--border) 40px);
}
.login-card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  width: 100%; max-width: 400px;
  box-shadow: var(--shadow);
}
.login-card__logo {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 8px;
}
.login-card__title {
  font-size: 1.6rem; font-weight: 700;
  color: var(--text-0); margin-bottom: 32px;
}
.login-card__title span { color: var(--text-2); font-weight: 300; }

/* ============================================================ Forms */
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-2);
  margin-bottom: 8px;
  font-family: var(--font-mono);
}
.form-control {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-0);
  font-size: 0.9rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-control:focus {
  outline: none;
  border-color: var(--amber-dim);
  box-shadow: 0 0 0 3px var(--amber-glow);
}
textarea.form-control { min-height: 90px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ============================================================ Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 8px 16px;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary {
  background: var(--amber);
  color: #0d0f12;
  border-color: var(--amber);
}
.btn-primary:hover:not(:disabled) {
  background: #ffb733;
  box-shadow: 0 0 16px var(--amber-glow);
}
.btn-secondary {
  background: var(--bg-3);
  color: var(--text-1);
  border-color: var(--border-light);
}
.btn-secondary:hover:not(:disabled) {
  background: var(--bg-4);
  border-color: var(--text-3);
}
.btn-ghost {
  background: transparent;
  color: var(--text-2);
  border-color: transparent;
}
.btn-ghost:hover:not(:disabled) { color: var(--text-0); background: var(--bg-3); }
.btn-danger {
  background: transparent;
  color: var(--red);
  border-color: var(--border);
}
.btn-danger:hover:not(:disabled) {
  background: var(--red-glow);
  border-color: var(--red-dim);
}
.btn-success {
  background: var(--green-dim);
  color: #fff;
  border-color: var(--green-dim);
}
.btn-success:hover:not(:disabled) { background: var(--green); }
.btn-sm { padding: 5px 11px; font-size: 0.76rem; }
.btn-lg { padding: 12px 24px; font-size: 0.92rem; }
.btn-icon { padding: 7px; border-radius: var(--radius-sm); }
.btn-icon svg { display: block; }
.btn-full { width: 100%; justify-content: center; }

/* ============================================================ Cards */
.card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.card__header {
  display: flex; align-items: center; gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.card__title {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-2);
  font-family: var(--font-mono);
}
.card__body { padding: 20px; }

/* ============================================================ Dashboard */
.dashboard__header {
  display: flex; align-items: flex-start; justify-content: space-between;
  margin-bottom: 28px; gap: 16px;
}
.dashboard__title { font-size: 1.8rem; font-weight: 700; }
.dashboard__subtitle { color: var(--text-2); font-size: 0.88rem; margin-top: 4px; }

.search-bar {
  display: flex; gap: 10px;
  margin-bottom: 24px;
}
.search-bar .form-control { max-width: 340px; }

/* Product grid */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}
.product-card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  cursor: pointer;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
}
.product-card:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.product-card__name {
  font-size: 1rem; font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-0);
}
.product-card__desc {
  font-size: 0.82rem; color: var(--text-2);
  margin-bottom: 16px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.product-card__meta {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 0.76rem;
}
.product-card__date { color: var(--text-3); font-family: var(--font-mono); }
.product-card__actions {
  position: absolute; top: 12px; right: 12px;
  display: flex; gap: 4px; opacity: 0;
  transition: opacity var(--transition);
}
.product-card:hover .product-card__actions { opacity: 1; }

/* Progress bar */
.progress-bar {
  height: 4px; border-radius: 2px;
  background: var(--bg-3);
  overflow: hidden; margin-bottom: 12px;
}
.progress-bar__fill {
  height: 100%; border-radius: 2px;
  background: var(--green);
  transition: width 0.4s ease;
}
.progress-label {
  font-size: 0.72rem; font-family: var(--font-mono);
  color: var(--text-3);
}
.progress-label .complete { color: var(--green); font-weight: 600; }

/* ============================================================ Badges */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 9px; border-radius: 99px;
  font-size: 0.7rem; font-weight: 600;
  letter-spacing: 0.05em; text-transform: uppercase;
  font-family: var(--font-mono);
}
.badge-active   { background: var(--green-glow); color: var(--green); border: 1px solid var(--green-dim); }
.badge-archived { background: var(--bg-3); color: var(--text-3); border: 1px solid var(--border); }
.badge-share    { background: var(--amber-glow); color: var(--amber); border: 1px solid var(--amber-dim); }

/* ============================================================ Product Page */
.product-hero {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin-bottom: 28px;
}
.product-hero__back {
  font-size: 0.78rem; font-family: var(--font-mono);
  color: var(--text-2); margin-bottom: 16px;
  display: inline-flex; align-items: center; gap: 6px;
}
.product-hero__back:hover { color: var(--amber); }
.product-hero__name { font-size: 2rem; font-weight: 700; margin-bottom: 8px; }
.product-hero__desc { color: var(--text-1); max-width: 600px; }
.product-hero__actions {
  display: flex; gap: 10px; align-items: center;
  margin-top: 20px; flex-wrap: wrap;
}
.share-url-box {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 6px 12px;
  font-family: var(--font-mono); font-size: 0.76rem;
  color: var(--text-2); flex: 1; min-width: 0;
  max-width: 460px;
}
.share-url-box span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; }

/* ============================================================ Sections (tabs) */
.section-tabs {
  display: flex; gap: 4px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 6px;
  margin-bottom: 24px;
  width: fit-content;
}
.section-tab {
  padding: 9px 24px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem; font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-2);
  border: none; background: transparent;
  transition: all var(--transition);
  font-family: var(--font-mono);
  display: flex; align-items: center; gap: 8px;
}
.section-tab:hover { color: var(--text-0); }
.section-tab.active {
  background: var(--bg-3);
  color: var(--amber);
  box-shadow: var(--shadow-sm);
}
.tab-count {
  font-size: 0.68rem;
  background: var(--bg-4);
  color: var(--text-3);
  padding: 1px 6px; border-radius: 99px;
}
.section-tab.active .tab-count { background: var(--amber-glow); color: var(--amber); }

/* ============================================================ Vendor cards */
.vendors-list { display: flex; flex-direction: column; gap: 16px; }
.vendor-block {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.vendor-block__header {
  display: flex; align-items: center;
  padding: 16px 20px;
  gap: 12px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
}
.vendor-block__num {
  font-family: var(--font-mono);
  font-size: 0.7rem; font-weight: 600;
  color: var(--amber);
  background: var(--amber-glow);
  border: 1px solid var(--amber-dim);
  padding: 2px 8px; border-radius: 99px;
  flex-shrink: 0;
}
.vendor-block__name {
  font-weight: 600; font-size: 0.95rem; flex: 1;
}
.vendor-block__body { padding: 20px; }
.vendor-block__desc { color: var(--text-2); font-size: 0.88rem; margin-bottom: 20px; }

/* ============================================================ Checklist */
.checklist { display: flex; flex-direction: column; gap: 6px; }
.checklist-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 12px;
}
.checklist-title {
  font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-3); font-family: var(--font-mono);
}
.checklist-item {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 12px 14px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), background var(--transition);
}
.checklist-item.complete {
  background: var(--green-glow);
  border-color: rgba(61, 214, 140, 0.2);
}
.checklist-item__check {
  width: 20px; height: 20px; flex-shrink: 0;
  border: 2px solid var(--border-light);
  border-radius: 4px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
  background: transparent; margin-top: 1px;
}
.checklist-item__check:hover { border-color: var(--green); }
.checklist-item.complete .checklist-item__check {
  background: var(--green);
  border-color: var(--green);
}
.checklist-item__content { flex: 1; min-width: 0; }
.checklist-item__title {
  font-weight: 500; font-size: 0.88rem;
  color: var(--text-0);
  margin-bottom: 2px;
}
.checklist-item.complete .checklist-item__title {
  text-decoration: line-through; color: var(--text-3);
}
.checklist-item__details { font-size: 0.8rem; color: var(--text-2); }
.checklist-item__files { margin-top: 8px; display: flex; flex-wrap: wrap; gap: 6px; }
.checklist-item__actions {
  display: flex; gap: 4px; flex-shrink: 0; opacity: 0;
  transition: opacity var(--transition);
}
.checklist-item:hover .checklist-item__actions { opacity: 1; }

/* ============================================================ File chips */
.file-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 99px;
  font-size: 0.74rem; color: var(--text-1);
  transition: all var(--transition);
}
.file-chip:hover { border-color: var(--amber-dim); color: var(--amber); }
.file-chip__icon { font-size: 0.72rem; }
.file-chip__del {
  color: var(--text-3); background: none; border: none;
  padding: 0; line-height: 1; cursor: pointer; font-size: 0.8rem;
}
.file-chip__del:hover { color: var(--red); }

.file-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }

/* ============================================================ Upload zone */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  color: var(--text-3); font-size: 0.82rem;
}
.upload-zone:hover, .upload-zone.drag-over {
  border-color: var(--amber-dim);
  background: var(--amber-glow);
  color: var(--amber);
}
.upload-zone input[type=file] { display: none; }

/* ============================================================ Section panels */
.section-panel { display: none; }
.section-panel.active { display: block; }

.section-fields {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 20px;
}
.section-fields__title {
  font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-2); font-family: var(--font-mono);
  margin-bottom: 20px;
  padding-bottom: 12px; border-bottom: 1px solid var(--border);
}

/* ============================================================ Dividers */
.divider {
  border: none; border-top: 1px solid var(--border);
  margin: 20px 0;
}

/* ============================================================ Empty state */
.empty-state {
  text-align: center; padding: 60px 20px;
  color: var(--text-3);
}
.empty-state__icon { font-size: 3rem; margin-bottom: 16px; }
.empty-state h3 { font-size: 1rem; font-weight: 600; color: var(--text-2); margin-bottom: 8px; }
.empty-state p { font-size: 0.85rem; margin-bottom: 20px; }

/* ============================================================ Modal */
.modal-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(0,0,0,0.7);
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  opacity: 0; pointer-events: none;
  transition: opacity 0.2s ease;
}
.modal-overlay.open { opacity: 1; pointer-events: all; }
.modal {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 100%; max-width: 540px;
  max-height: 90vh; overflow-y: auto;
  box-shadow: 0 24px 80px rgba(0,0,0,0.5);
  transform: translateY(12px);
  transition: transform 0.2s ease;
}
.modal-overlay.open .modal { transform: translateY(0); }
.modal__header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}
.modal__title { font-weight: 700; font-size: 1rem; }
.modal__body { padding: 24px; }
.modal__footer {
  display: flex; justify-content: flex-end; gap: 10px;
  padding: 16px 24px;
  border-top: 1px solid var(--border);
}

/* ============================================================ Toast */
.toast-container {
  position: fixed; bottom: 24px; right: 24px;
  z-index: 999; display: flex; flex-direction: column; gap: 8px;
}
.toast {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: 0.84rem; color: var(--text-0);
  box-shadow: var(--shadow);
  display: flex; align-items: center; gap: 10px;
  max-width: 320px;
  animation: slideIn 0.2s ease;
}
.toast.success { border-left: 3px solid var(--green); }
.toast.error   { border-left: 3px solid var(--red); }
.toast.info    { border-left: 3px solid var(--blue); }
@keyframes slideIn {
  from { transform: translateX(20px); opacity: 0; }
  to   { transform: translateX(0); opacity: 1; }
}

/* ============================================================ Spinner */
.spinner {
  display: inline-block;
  width: 16px; height: 16px;
  border: 2px solid var(--border-light);
  border-top-color: var(--amber);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================================ Share page */
.share-header {
  background: var(--bg-1);
  border-bottom: 1px solid var(--border);
  padding: 20px 32px;
  display: flex; align-items: center; gap: 16px;
}
.share-badge {
  background: var(--amber-glow);
  border: 1px solid var(--amber-dim);
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 0.68rem; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase;
  padding: 3px 10px; border-radius: 99px;
}
/* read-only indicators */
.read-only-notice {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 16px;
  font-size: 0.78rem; color: var(--text-3);
  margin-bottom: 20px;
  text-align: center;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

/* ============================================================ Utilities */
.flex { display: flex; }
.flex-center { display: flex; align-items: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-4 { gap: 4px; } .gap-8 { gap: 8px; } .gap-12 { gap: 12px; } .gap-16 { gap: 16px; }
.mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; } .mb-16 { margin-bottom: 16px; }
.text-muted { color: var(--text-2); }
.text-xs { font-size: 0.76rem; }
.text-sm { font-size: 0.85rem; }
.mono { font-family: var(--font-mono); }
.hidden { display: none !important; }

/* ============================================================ Responsive */
@media (max-width: 768px) {
  .content { padding: 16px; }
  .products-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .topnav { padding: 0 16px; }
  .product-hero { padding: 20px; }
  .section-tabs { overflow-x: auto; }
}