@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600;700&display=swap');

:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --ink: #15171f;
  --ink-soft: #6b7280;
  --ink-faint: #9aa0ac;
  --border: #e6e8ee;
  --sidebar: #12131a;
  --sidebar-ink: #b7b9c6;
  --sidebar-ink-active: #ffffff;
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --primary-soft: #eef0ff;
  --accent: #10b981;
  --accent-soft: #e6f9f1;
  --amber: #f59e0b;
  --amber-soft: #fef3e0;
  --danger: #ef4444;
  --danger-soft: #fdeaea;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(15, 17, 26, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 17, 26, 0.08);
  --sidebar-w: 248px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 14.5px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  margin: 0;
  letter-spacing: -0.01em;
}

button, input {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

/* ---------- Layout ---------- */

#sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-w);
  background: var(--sidebar);
  color: var(--sidebar-ink);
  display: flex;
  flex-direction: column;
  padding: 22px 16px;
  z-index: 40;
  transition: transform 0.25s ease;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 10px 26px 10px;
  color: #ffffff;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  overflow: hidden;
  flex-shrink: 0;
}

.brand-logo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.brand-name {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.01em;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 11px;
  background: transparent;
  border: none;
  color: var(--sidebar-ink);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: left;
  font-size: 14px;
  font-weight: 500;
  transition: background 0.15s ease, color 0.15s ease;
}

.nav-item .nav-icon { flex-shrink: 0; opacity: 0.85; }

.nav-item:hover {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
}

.nav-item.active {
  background: rgba(79, 70, 229, 0.22);
  color: var(--sidebar-ink-active);
}

.nav-item.active .nav-icon { opacity: 1; color: #a5b4fc; }

.sidebar-footer {
  margin-top: auto;
}

.sidebar-tip {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-md);
  padding: 14px;
}

.sidebar-tip strong {
  display: block;
  color: #fff;
  font-size: 12.5px;
  margin-bottom: 4px;
}

.sidebar-tip p {
  margin: 0;
  font-size: 12.5px;
  color: var(--ink-faint);
  line-height: 1.5;
}

#sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 15, 0.4);
  z-index: 30;
}

#app {
  margin-left: var(--sidebar-w);
  min-height: 100vh;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 16px;
  background: rgba(246, 247, 251, 0.86);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  padding: 18px 32px;
}

#menu-toggle {
  display: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.topbar-titles { flex: 1; }

.topbar-titles h1 {
  font-size: 20px;
  font-weight: 700;
}

.topbar-titles p {
  margin: 2px 0 0;
  color: var(--ink-soft);
  font-size: 13px;
}

.content {
  padding: 28px 32px 64px;
  max-width: 1240px;
}

.view.hidden { display: none; }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
  white-space: nowrap;
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 1px 2px rgba(79, 70, 229, 0.25);
}

.btn-primary:hover { background: var(--primary-dark); }

.btn-secondary {
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--border);
}

.btn-secondary:hover { background: var(--bg); }

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.btn-danger:hover { background: #dc2626; }

.btn-full { width: 100%; justify-content: center; margin-top: 18px; }

.link-btn {
  background: none;
  border: none;
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
}

.link-btn:hover { text-decoration: underline; }

.topbar-cta { flex-shrink: 0; }

/* ---------- Cards ---------- */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.card-title { font-size: 16px; font-weight: 700; }

.card-subtitle {
  margin: 6px 0 20px;
  color: var(--ink-soft);
  font-size: 13px;
}

/* ---------- Stat grid (dashboard) ---------- */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.stat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.stat-label {
  font-size: 12.5px;
  color: var(--ink-soft);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.stat-value {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 28px;
  font-weight: 700;
  line-height: 1.2;
}

.stat-caption {
  font-size: 12px;
  color: var(--ink-faint);
}

.stat-card-gauge {
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 10px;
}

/* ---------- Panels / tables ---------- */

.panel { padding: 22px 24px; margin-bottom: 20px; }

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 12px;
  flex-wrap: wrap;
}

.panel-header h2 { font-size: 16px; font-weight: 700; }

.panel-header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.search-input {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  font-size: 13px;
  width: 200px;
  background: var(--bg);
}

.search-input:focus { outline: 2px solid var(--primary-soft); border-color: var(--primary); }

.table-wrap { overflow-x: auto; }

.data-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 620px;
}

.data-table th {
  text-align: left;
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
  font-weight: 700;
  padding: 0 12px 10px;
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 13px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 13.5px;
  vertical-align: middle;
}

.data-table tr:last-child td { border-bottom: none; }

.data-table tbody tr { transition: background 0.12s ease; }
.data-table tbody tr:hover { background: var(--bg); }

.product-name-cell { font-weight: 600; }

.row-actions {
  display: flex;
  gap: 6px;
  justify-content: flex-end;
}

.icon-btn {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 7px;
  cursor: pointer;
  color: var(--ink-soft);
  transition: background 0.12s ease, color 0.12s ease, border-color 0.12s ease;
}

.icon-btn:hover { background: var(--bg); color: var(--ink); }
.icon-btn.danger:hover { background: var(--danger-soft); color: var(--danger); border-color: #f6c6c6; }

.empty-state {
  padding: 32px 12px;
  text-align: center;
  color: var(--ink-soft);
  font-size: 13.5px;
}

/* ---------- Badges ---------- */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
}

.badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.badge-healthy { background: var(--accent-soft); color: #0d8f5f; }
.badge-moderate { background: var(--amber-soft); color: #b5790a; }
.badge-low { background: var(--danger-soft); color: #c53030; }
.badge-loss { background: #f1f2f4; color: #5b6070; }

/* ---------- Calculator ---------- */

.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: start;
}

.calc-form-card, .results-card { padding: 24px; }

.form-group { margin-bottom: 16px; display: flex; flex-direction: column; gap: 6px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.form-row-single { grid-template-columns: 1fr; }

label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink-soft);
}

input[type="text"], input[type="number"] {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  background: var(--bg);
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
  width: 100%;
}

input[type="text"]:focus, input[type="number"]:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
  background: var(--surface);
}

.calc-results-col { display: flex; flex-direction: column; gap: 20px; }

.results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 20px;
}

.result-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.result-label { font-size: 12px; color: var(--ink-soft); font-weight: 600; }

.result-value {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 19px;
  font-weight: 700;
}

.your-price-row {
  display: flex;
  align-items: flex-end;
  gap: 14px;
  padding-top: 4px;
  border-top: 1px dashed var(--border);
  padding-top: 18px;
  margin-top: 2px;
}

.your-price-row .form-group { flex: 1; margin-bottom: 0; }
.your-price-row .link-btn { padding-bottom: 11px; flex-shrink: 0; }

.gauge-row {
  display: flex;
  align-items: flex-start;
  gap: 28px;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.gauge-item {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 1;
  min-width: 220px;
}

.gauge-caption { display: flex; flex-direction: column; gap: 6px; }
.gauge-caption p { margin: 0; font-size: 12.5px; color: var(--ink-soft); }

/* ---------- Gauge (signature element) ---------- */

.gauge {
  --pct: 0;
  --gauge-color: var(--accent);
  width: 108px;
  height: 108px;
  border-radius: 50%;
  background: conic-gradient(var(--gauge-color) calc(var(--pct) * 3.6deg), var(--border) 0deg);
  display: grid;
  place-items: center;
  position: relative;
  flex-shrink: 0;
  transition: background 0.4s ease;
}

.gauge::before {
  content: '';
  position: absolute;
  inset: 10px;
  border-radius: 50%;
  background: var(--surface);
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.06);
}

.gauge-value {
  position: relative;
  z-index: 1;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 18px;
}

.stat-card-gauge .gauge { width: 84px; height: 84px; }
.stat-card-gauge .gauge-value { font-size: 15px; }

/* ---------- Insight card ---------- */

.insight-card {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 20px;
  background: linear-gradient(135deg, var(--primary-soft), #f7f8ff);
  border-color: #dcdcfb;
}

.insight-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: #fff;
  display: grid;
  place-items: center;
  color: var(--primary);
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.insight-label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--primary-dark);
  margin-bottom: 4px;
}

.insight-card p { margin: 0; font-size: 14px; color: var(--ink); line-height: 1.55; }

/* ---------- Modal ---------- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 17, 26, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}

.modal-overlay.hidden { display: none; }

.modal {
  background: var(--surface);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 24px 60px rgba(15, 17, 26, 0.25);
  animation: modal-in 0.16s ease;
}

.modal-small { max-width: 400px; }

@keyframes modal-in {
  from { opacity: 0; transform: translateY(6px) scale(0.99); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h2 { font-size: 17px; font-weight: 700; }

.modal-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--ink-soft);
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 7px;
}

.modal-close:hover { background: var(--bg); }

.modal-body {
  padding: 20px 24px;
  overflow-y: auto;
}

.modal-results {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 6px;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
}

.modal-result-item {
  background: var(--bg);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-size: 12px;
  color: var(--ink-soft);
}

.modal-result-item strong {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 16px;
  color: var(--ink);
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* ---------- Toast ---------- */

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(0);
  background: var(--ink);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-weight: 600;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
  z-index: 200;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast.hidden { opacity: 0; transform: translateX(-50%) translateY(10px); pointer-events: none; }

/* ---------- Responsive ---------- */

@media (max-width: 980px) {
  .calc-grid { grid-template-columns: 1fr; }
}

@media (max-width: 880px) {
  #sidebar {
    transform: translateX(-100%);
    box-shadow: 0 0 40px rgba(0,0,0,0.3);
  }
  #sidebar.open { transform: translateX(0); }
  #sidebar-overlay.open { display: block; }

  #app { margin-left: 0; }

  #menu-toggle { display: flex; }

  .content { padding: 20px 16px 48px; }
  .topbar { padding: 14px 16px; }

  .stat-grid { grid-template-columns: 1fr 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .results-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 560px) {
  .stat-grid { grid-template-columns: 1fr; }
  .topbar-titles h1 { font-size: 17px; }
  .topbar-cta span { display: none; }
  .panel-header-actions { width: 100%; }
  .search-input { flex: 1; width: auto; }
  .your-price-row { flex-direction: column; align-items: stretch; }
  .gauge-row { flex-direction: column; align-items: flex-start; }
}

/* ==========================================================
   HOME VIEW
========================================================== */
.home-hero {
  padding: 40px;
  background: linear-gradient(135deg, var(--primary), #6f67ef);
  color: #ffffff;
  margin-bottom: 20px;
}

.home-hero-text { max-width: 560px; }

.home-eyebrow {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.8);
  margin-bottom: 10px;
}

.home-hero-text h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 28px;
  line-height: 1.25;
  margin: 0 0 12px 0;
}

.home-hero-text p {
  margin: 0 0 22px 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: rgba(255,255,255,0.88);
}

.home-hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.home-hero-actions .btn-primary {
  background: #ffffff;
  color: var(--primary-dark);
}
.home-hero-actions .btn-primary:hover { background: #f0f0ff; }

.home-hero-actions .btn-secondary {
  background: rgba(255,255,255,0.12);
  color: #ffffff;
  border-color: rgba(255,255,255,0.35);
}
.home-hero-actions .btn-secondary:hover { background: rgba(255,255,255,0.2); }

.home-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.home-feature-card {
  padding: 22px;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.home-feature-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.home-feature-icon {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--primary-soft);
  color: var(--primary);
  margin-bottom: 14px;
}

.home-feature-card h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 15.5px;
  margin: 0 0 6px 0;
}

.home-feature-card p {
  margin: 0;
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.5;
}

@media (max-width: 880px) {
  .home-grid { grid-template-columns: 1fr 1fr; }
  .home-hero { padding: 28px; }
  .home-hero-text h2 { font-size: 23px; }
}

@media (max-width: 560px) {
  .home-grid { grid-template-columns: 1fr; }
}

/* ==========================================================
   TUTORIAL VIEW
========================================================== */
.tutorial-panel { padding: 28px; }

.tutorial-steps {
  list-style: none;
  counter-reset: step;
  margin: 20px 0 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.tutorial-steps li {
  counter-increment: step;
  position: relative;
  padding-left: 44px;
}

.tutorial-steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-weight: 700;
  font-size: 13px;
  display: grid;
  place-items: center;
}

.tutorial-steps h4 {
  margin: 3px 0 4px 0;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 14.5px;
}

.tutorial-steps p {
  margin: 0;
  font-size: 13.5px;
  color: var(--ink-soft);
  line-height: 1.55;
}

.tutorial-cta {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

/* ==========================================================
   AI PRODUCT DESCRIPTIONS VIEW
========================================================== */
.ai-desc-panel { padding: 28px; }

.ai-desc-intro {
  margin: 10px 0 24px 0;
  font-size: 13.5px;
  color: var(--ink-soft);
  line-height: 1.6;
  max-width: 640px;
}

.ai-desc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: start;
}

.ai-desc-preview {
  display: block;
  width: 100%;
  max-height: 200px;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  margin-bottom: 16px;
}

.ai-desc-result {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ai-desc-result label {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
}

.ai-desc-result textarea {
  width: 100%;
  resize: vertical;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
}

@media (max-width: 880px) {
  .ai-desc-grid { grid-template-columns: 1fr; }
}