/* RuralKeep Design System
   Apple-like simplicity, calm, trustworthy, practical rural/home-maintenance aesthetics.
   Zero dependencies, full responsive support, light and dark themes.
   Compatible with both local file:// viewing and production web hosting.
*/

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Colors - Light Mode */
  --bg-page: #f6f7f8;
  --bg-card: #ffffff;
  --bg-card-subtle: #f0f2f5;
  --border-color: #e2e5e9;
  --border-subtle: #edf0f3;

  --text-primary: #1a1c1e;
  --text-secondary: #535a63;
  --text-muted: #737c88;

  /* Restrained Blue/Slate Brand Accent */
  --color-accent: #236c9e;
  --color-accent-hover: #1b547c;
  --color-accent-subtle: #edf4f9;
  --color-accent-text: #ffffff;

  --focus-ring: rgba(35, 108, 158, 0.4);

  /* Spacing & Sizing */
  --container-max-width: 880px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 16px;
  --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-page: #121416;
    --bg-card: #1a1d20;
    --bg-card-subtle: #22262b;
    --border-color: #2b3037;
    --border-subtle: #202429;

    --text-primary: #f0f2f5;
    --text-secondary: #a3abb7;
    --text-muted: #788290;

    --color-accent: #4392cc;
    --color-accent-hover: #5ba3da;
    --color-accent-subtle: #192735;
    --color-accent-text: #ffffff;

    --focus-ring: rgba(67, 146, 204, 0.45);
    --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.25);
  }
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-page);
  color: var(--text-primary);
}

/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1.5rem;
  background: var(--color-accent);
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  z-index: 1000;
  text-decoration: none;
  font-weight: 500;
}
.skip-link:focus {
  top: 1rem;
}

/* Shared Header */
.site-header {
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-inner {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  object-fit: cover;
  display: block;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.brand-name {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 0.35rem;
}

.nav-link {
  display: inline-block;
  padding: 0.45rem 0.85rem;
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: color 0.15s ease, background-color 0.15s ease;
}

.nav-link:hover {
  color: var(--text-primary);
  background-color: var(--bg-card-subtle);
}

.nav-link.active {
  color: var(--color-accent);
  background-color: var(--color-accent-subtle);
  font-weight: 600;
}

/* Main Layout */
.main-content {
  flex: 1;
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 2.25rem 1.5rem 4rem;
}

/* Page Header */
.page-header {
  margin-bottom: 2rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.page-category {
  display: inline-block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 0.4rem;
}

.page-title {
  font-size: 2.1rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.page-intro {
  font-size: 1.075rem;
  color: var(--text-secondary);
  line-height: 1.55;
  max-width: 720px;
}

.page-meta {
  margin-top: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Cards & Sections */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-subtle);
  margin-bottom: 1.5rem;
}

/* Support Contact Card */
.contact-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  box-shadow: var(--shadow-subtle);
  margin-bottom: 2.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

@media (min-width: 600px) {
  .contact-card {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.contact-info h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: var(--text-primary);
}

.contact-email {
  color: var(--text-secondary);
  font-size: 0.95rem;
  word-break: break-all;
}

.contact-email strong {
  color: var(--text-primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.4rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background-color 0.15s ease, transform 0.05s ease;
  white-space: nowrap;
  border: none;
  cursor: pointer;
}

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

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  text-decoration: none;
}

.btn:active {
  transform: scale(0.99);
}

/* FAQ Sections */
.faq-section {
  margin-bottom: 2.5rem;
}

.section-title {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.faq-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.35rem 1.45rem;
}

.faq-question {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.45rem;
  letter-spacing: -0.01em;
}

.faq-answer {
  font-size: 0.965rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Troubleshooting Section */
.troubleshooting-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  margin-bottom: 2.5rem;
}

.trouble-block {
  padding-bottom: 1.25rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
}

.trouble-block:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: none;
}

.trouble-title {
  font-size: 1.025rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.trouble-list {
  margin-left: 1.25rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.trouble-list li {
  margin-bottom: 0.4rem;
}

.trouble-list li:last-child {
  margin-bottom: 0;
}

/* Legal Documents (Privacy & Terms) */
.legal-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.legal-section {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.45rem 1.6rem;
}

.legal-heading {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.65rem;
  letter-spacing: -0.01em;
}

.legal-text {
  font-size: 0.965rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 0.65rem;
}

.legal-text:last-child {
  margin-bottom: 0;
}

.legal-list {
  margin-left: 1.35rem;
  margin-top: 0.45rem;
  margin-bottom: 0.65rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.legal-list li {
  margin-bottom: 0.35rem;
}

.legal-note {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-style: italic;
  margin-top: 0.5rem;
}

/* Root Landing Page / App Overview Card */
.app-overview-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.75rem 2rem;
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.app-overview-icon {
  width: 96px;
  height: 96px;
  border-radius: 22px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.1);
  margin-bottom: 1.35rem;
  object-fit: cover;
}

.app-overview-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 0.35rem;
  color: var(--text-primary);
}

.app-overview-subtitle {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.app-overview-desc {
  font-size: 1.025rem;
  color: var(--text-secondary);
  max-width: 620px;
  line-height: 1.6;
  margin-bottom: 2rem;
}

.portal-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  width: 100%;
}

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

.portal-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.4rem;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s ease, background-color 0.15s ease, transform 0.1s ease;
  text-align: left;
}

.portal-card:hover {
  border-color: var(--color-accent);
  background-color: var(--color-accent-subtle);
  text-decoration: none;
  transform: translateY(-1px);
}

.portal-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.45rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.portal-arrow {
  color: var(--color-accent);
  font-size: 0.95rem;
}

.portal-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Shared Footer */
.site-footer {
  margin-top: auto;
  background-color: var(--bg-card);
  border-top: 1px solid var(--border-color);
  padding: 2.25rem 1.5rem;
}

.footer-inner {
  max-width: var(--container-max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .footer-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.footer-brand {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.footer-email {
  font-size: 0.885rem;
  color: var(--text-secondary);
}

.footer-email a {
  color: var(--color-accent);
  text-decoration: none;
}

.footer-email a:hover {
  text-decoration: underline;
}

.footer-copyright {
  font-size: 0.825rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  list-style: none;
}

.footer-link {
  font-size: 0.885rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s ease;
}

.footer-link:hover {
  color: var(--text-primary);
  text-decoration: underline;
}

/* Links and Interactive Focus */
a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Responsive utilities */
@media (max-width: 540px) {
  .header-inner {
    padding: 0.75rem 1rem;
  }
  .nav-link {
    padding: 0.35rem 0.55rem;
    font-size: 0.85rem;
  }
  .main-content {
    padding: 1.75rem 1rem 3rem;
  }
  .page-title {
    font-size: 1.7rem;
  }
  .card, .contact-card, .troubleshooting-card, .legal-section {
    padding: 1.25rem;
  }
}