/* ===== Design Tokens ===== */
:root {
  --color-primary: #1a2744;
  --color-accent: #e8a020;
  --color-bg: #f8f8f5;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #5a5a5a;
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --max-width: 960px;
  --pad-x: 1.25rem;
  --radius: 6px;
  --shadow: 0 2px 8px rgba(26, 39, 68, 0.10);
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-stack);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover, a:focus-visible {
  color: var(--color-accent);
}

/* ===== Layout Utilities ===== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

main {
  flex: 1;
}

/* ===== Typography ===== */
h1, h2, h3, h4 {
  color: var(--color-primary);
  line-height: 1.25;
  font-weight: 700;
}

h1 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
}

h2 {
  font-size: 1.375rem;
  margin-bottom: 0.75rem;
}

h3 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

p {
  margin-bottom: 1rem;
}

/* ===== Navigation ===== */
.site-header {
  background: var(--color-primary);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 56px;
}

.nav-brand {
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.125rem;
  white-space: nowrap;
}

.nav-brand:hover,
.nav-brand:focus-visible {
  color: var(--color-accent);
}

/* Hamburger toggle (pure CSS) */
.nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  cursor: pointer;
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  position: relative;
  transition: var(--transition);
}

.nav-toggle-label span::before,
.nav-toggle-label span::after {
  content: '';
  position: absolute;
  left: 0;
}

.nav-toggle-label span::before {
  top: -7px;
}

.nav-toggle-label span::after {
  top: 7px;
}

.nav-toggle:checked + .nav-toggle-label span {
  background: transparent;
}

.nav-toggle:checked + .nav-toggle-label span::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle:checked + .nav-toggle-label span::after {
  top: 0;
  transform: rotate(-45deg);
}

.nav-links {
  list-style: none;
  display: none;
  flex-direction: column;
  width: 100%;
  background: var(--color-primary);
  position: absolute;
  top: 56px;
  left: 0;
  padding: 0.5rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-toggle:checked ~ .nav-links {
  display: flex;
}

.nav-links li {
  width: 100%;
}

.nav-links a {
  display: block;
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  padding: 0.75rem var(--pad-x);
  transition: background var(--transition), color var(--transition);
}

.nav-links a:hover,
.nav-links a:focus-visible {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.nav-links a[aria-current="page"] {
  color: var(--color-accent);
  font-weight: 600;
}

.nav-coffee {
  color: var(--color-accent) !important;
  font-weight: 600;
  white-space: nowrap;
}

@media (min-width: 640px) {
  .nav-toggle-label {
    display: none;
  }

  .nav-links {
    display: flex;
    flex-direction: row;
    position: static;
    width: auto;
    background: transparent;
    padding: 0;
    border: none;
    gap: 0.25rem;
  }

  .nav-links a {
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
    font-size: 0.9375rem;
  }
}

/* ===== Hero Section ===== */
.hero {
  background: var(--color-primary);
  color: #fff;
  padding: 3rem 0 2.5rem;
  text-align: center;
}

.hero h1 {
  color: #fff;
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
}

.hero p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1.0625rem;
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: 1.5rem;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius);
  font-family: var(--font-stack);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition), transform var(--transition);
  line-height: 1.4;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn-accent {
  background: var(--color-accent);
  color: var(--color-primary);
}

.btn-accent:hover {
  background: #d49318;
  color: var(--color-primary);
  transform: translateY(-1px);
}

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

.btn-primary:hover {
  background: #243758;
  color: #fff;
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
}

/* ===== Sections ===== */
.section {
  padding: 2.5rem 0;
}

.section-alt {
  background: var(--color-surface);
}

.section-title {
  text-align: center;
  margin-bottom: 2rem;
}

/* ===== How It Works ===== */
.steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.step-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  box-shadow: var(--shadow);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-primary);
  font-weight: 700;
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.step-card h3 {
  margin-bottom: 0.5rem;
}

.step-card p {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  margin-bottom: 0;
}

@media (min-width: 640px) {
  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  h1 {
    font-size: 2.25rem;
  }

  .hero h1 {
    font-size: 2.25rem;
  }

  h2 {
    font-size: 1.625rem;
  }
}

/* ===== Planner Tool ===== */
.planner {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.planner-step {
  display: none;
  animation: fadeIn 0.25s ease;
}

.planner-step.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.planner-step h3 {
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-accent);
}

.planner-progress {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 1.5rem;
}

.planner-progress-step {
  flex: 1;
  height: 4px;
  border-radius: 2px;
  background: #e0e0dc;
  transition: background var(--transition);
}

.planner-progress-step.completed {
  background: var(--color-accent);
}

.planner-progress-step.current {
  background: var(--color-primary);
}

/* Preset buttons */
.preset-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.preset-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1rem;
  border: 2px solid #e0e0dc;
  border-radius: var(--radius);
  background: var(--color-bg);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  font-family: var(--font-stack);
}

.preset-btn:hover,
.preset-btn:focus-visible {
  border-color: var(--color-primary);
}

.preset-btn.selected {
  border-color: var(--color-accent);
  background: rgba(232, 160, 32, 0.06);
}

.preset-btn strong {
  font-size: 1rem;
  color: var(--color-primary);
}

.preset-btn span {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

@media (min-width: 640px) {
  .preset-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Custom dimensions */
.custom-dims {
  display: none;
  gap: 0.75rem;
  padding: 1rem;
  background: var(--color-bg);
  border-radius: var(--radius);
  margin-bottom: 1rem;
}

.custom-dims.visible {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.form-group label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 0.625rem 0.75rem;
  border: 1.5px solid #d0d0cc;
  border-radius: var(--radius);
  font-family: var(--font-stack);
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(232, 160, 32, 0.15);
}

/* Goals checkboxes */
.goals-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.goal-option {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1rem;
  border: 2px solid #e0e0dc;
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}

.goal-option:hover {
  border-color: var(--color-primary);
}

.goal-option input[type="checkbox"] {
  accent-color: var(--color-accent);
  width: 18px;
  height: 18px;
}

.goal-option input[type="checkbox"]:checked + .goal-label {
  color: var(--color-primary);
  font-weight: 600;
}

.goal-label {
  font-size: 1rem;
  color: var(--color-text);
}

@media (min-width: 640px) {
  .goals-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Budget radio buttons */
.budget-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.budget-option {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1rem;
  border: 2px solid #e0e0dc;
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}

.budget-option:hover {
  border-color: var(--color-primary);
}

.budget-option input[type="radio"] {
  accent-color: var(--color-accent);
  width: 18px;
  height: 18px;
}

.budget-option input[type="radio"]:checked + .budget-label {
  color: var(--color-primary);
  font-weight: 600;
}

.budget-label {
  font-size: 1rem;
  color: var(--color-text);
}

@media (min-width: 640px) {
  .budget-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Planner navigation buttons */
.planner-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 1.5rem;
  gap: 1rem;
}

.planner-nav .btn {
  min-width: 120px;
  text-align: center;
}

/* ===== Results ===== */
.results-area {
  margin-top: 1.5rem;
}

.layout-svg-wrap {
  background: var(--color-bg);
  border: 1px solid #e0e0dc;
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1.5rem;
  overflow-x: auto;
}

.layout-svg-wrap svg {
  display: block;
  margin-inline: auto;
  max-width: 100%;
  height: auto;
}

/* Layout legend (numbered key for SVG equipment) */
.layout-legend {
  background: var(--color-bg);
  border: 1px solid #e0e0dc;
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1.5rem;
}

.layout-legend-title {
  font-size: 0.9375rem;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.layout-legend-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  counter-reset: legend-counter;
}

.layout-legend-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.875rem;
  color: var(--color-text);
  counter-increment: legend-counter;
}

.layout-legend-item::before {
  content: counter(legend-counter) ".";
  font-weight: 700;
  color: var(--color-primary);
  min-width: 1.25rem;
}

.layout-legend-swatch {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 3px;
  flex-shrink: 0;
}

.layout-legend-name {
  font-weight: 600;
  color: var(--color-primary);
}

.layout-legend-dims {
  color: var(--color-text-secondary);
  font-size: 0.8125rem;
}

.equipment-list {
  list-style: none;
  padding: 0;
}

.equipment-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.875rem 1rem;
  border-bottom: 1px solid #eee;
  gap: 0.75rem;
}

.equipment-item:last-child {
  border-bottom: none;
}

.equipment-info {
  flex: 1;
}

.equipment-name {
  font-weight: 600;
  color: var(--color-primary);
  display: block;
}

.equipment-price {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.equipment-note {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  font-style: italic;
}

.equipment-link {
  flex-shrink: 0;
}

.total-cost {
  font-weight: 700;
  font-size: 1.125rem;
  text-align: right;
  padding: 1rem;
  background: var(--color-bg);
  border-radius: var(--radius);
  margin-top: 1rem;
}

/* ===== Sample Builds (Preset Cards) ===== */
.builds-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.build-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  border-top: 4px solid var(--color-accent);
}

.build-card h3 {
  margin-bottom: 0.25rem;
}

.build-meta {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
}

.build-card ul {
  padding-left: 1.25rem;
  margin-bottom: 1rem;
}

.build-card li {
  margin-bottom: 0.25rem;
  font-size: 0.9375rem;
}

.build-card .build-total {
  font-weight: 700;
  color: var(--color-primary);
}

@media (min-width: 640px) {
  .builds-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 720px;
  margin-inline: auto;
}

.faq-item {
  border-bottom: 1px solid #e0e0dc;
}

.faq-item summary {
  padding: 1rem 0;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.faq-item summary::after {
  content: '+';
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--color-text-secondary);
  flex-shrink: 0;
  transition: transform var(--transition);
}

.faq-item[open] summary::after {
  content: '\2212';
}

.faq-item p {
  padding-bottom: 1rem;
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
}

/* ===== Star Rating ===== */
.stars {
  display: inline-flex;
  gap: 2px;
  font-size: 1.25rem;
  line-height: 1;
}

.star-filled::before {
  content: '\2605';
  color: var(--color-accent);
}

.star-empty::before {
  content: '\2606';
  color: #ccc;
}

/* ===== Guide Links ===== */
.guides-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.guide-link {
  display: block;
  padding: 1.25rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition);
}

.guide-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(26, 39, 68, 0.12);
  color: var(--color-primary);
}

.guide-link h3 {
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}

.guide-link p {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  margin-bottom: 0;
}

@media (min-width: 640px) {
  .guides-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.7);
  padding: 1.5rem 0;
  font-size: 0.875rem;
  text-align: center;
  margin-top: auto;
}

.site-footer a {
  color: rgba(255, 255, 255, 0.85);
}

.site-footer a:hover {
  color: var(--color-accent);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.25rem 0.5rem;
}

.footer-sep {
  color: rgba(255, 255, 255, 0.3);
}

/* ===== Noscript fallback ===== */
.noscript-msg {
  padding: 1rem;
  background: #fff3cd;
  color: #856404;
  border-radius: var(--radius);
  text-align: center;
  margin-bottom: 1rem;
}

/* ===== Utilities ===== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center {
  text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* ===== Save Plan Area ===== */
.save-plan-area {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid #e0e0dc;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.save-msg {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.save-msg.success {
  color: #2e7d32;
}

.save-msg.error {
  color: #c62828;
}

/* ===== Saved Plan Banner ===== */
.saved-plan-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1rem;
  background: rgba(232, 160, 32, 0.1);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius);
  margin-bottom: 1rem;
  font-weight: 600;
  color: var(--color-primary);
}

.saved-plan-banner .btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.875rem;
}

/* ===== No Results ===== */
.no-results {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--color-text-secondary);
}

.no-results p {
  margin-bottom: 0.5rem;
}

/* ===== Stats Page ===== */
.stats-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

@media (min-width: 640px) {
  .stats-metrics {
    grid-template-columns: repeat(3, 1fr);
  }
}

.metric-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem 1rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.metric-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}

.metric-label {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-weight: 600;
}

.chart-wrap {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
  margin-bottom: 2rem;
  position: relative;
  height: 320px;
}

/* ===== Reviews Page ===== */

.reviews-aggregate {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1rem;
  margin-bottom: 0.5rem;
}

.reviews-aggregate .stars {
  font-size: 1.75rem;
}

.aggregate-text {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* Review cards container */
.review-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

/* Individual review card */
.review-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem 1.5rem;
}

.review-card-header {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-bottom: 0.5rem;
}

.review-card-meta {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.review-card-headline {
  font-size: 1rem;
  color: var(--color-primary);
  margin-bottom: 0.375rem;
}

.review-card-body {
  font-size: 0.9375rem;
  color: var(--color-text);
  margin-bottom: 0;
  line-height: 1.55;
}

/* Review submission form */
.review-form {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  max-width: 600px;
}

.review-form .form-group {
  margin-bottom: 1rem;
}

.review-form textarea {
  resize: vertical;
  min-height: 80px;
}

/* Star rating input */
.star-input {
  display: inline-flex;
  gap: 2px;
}

.star-input-btn {
  background: none;
  border: none;
  padding: 2px;
  cursor: pointer;
  font-size: 1.625rem;
  line-height: 1;
  transition: transform var(--transition);
}

.star-input-btn:hover {
  transform: scale(1.15);
}

.star-input-btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Review feedback messages */
.review-success {
  color: #2e7d32;
  font-weight: 600;
  padding: 0.75rem 1rem;
  background: #e8f5e9;
  border-radius: var(--radius);
}

.review-error {
  color: #c62828;
  font-weight: 600;
  padding: 0.75rem 1rem;
  background: #ffebee;
  border-radius: var(--radius);
}

/* Load more button */
.load-more-btn {
  min-width: 180px;
}