/* ==========================================================================
   Bixom Studio - Accessible Stylesheet (WCAG AA Compliant, 45+ Friendly)
   ========================================================================== */

:root {
  --font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  --color-bg: #f8fafc;
  --color-card-bg: #ffffff;
  --color-primary: #0f766e;      /* Deep Teal */
  --color-primary-dark: #115e59;
  --color-text: #0f172a;         /* High contrast Slate 900 */
  --color-text-muted: #475569;   /* Slate 600 */
  --color-border: #cbd5e1;       /* Slate 300 */
  --color-surface: #f1f5f9;      /* Slate 100 */
  --color-error: #b91c1c;
  --color-success: #15803d;
  --focus-ring: 3px solid #0284c7;
  --container-width: 1080px;
  --transition: 0.2s ease-in-out;
}

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

body {
  font-family: var(--font-family);
  font-size: 1.0625rem; /* 17px base for comfortable senior reading */
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-text-size-adjust: 100%;
}

a {
  color: var(--color-primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 10px;
  background: var(--color-primary-dark);
  color: #ffffff;
  padding: 8px 16px;
  z-index: 9999;
  border-radius: 4px;
  text-decoration: none;
  font-weight: bold;
}

.skip-link:focus {
  top: 10px;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Header */
.site-header {
  background-color: #ffffff;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary-dark);
}

.brand-icon {
  width: 36px;
  height: 36px;
}

.main-nav ul {
  display: flex;
  list-style: none;
  gap: 1.5rem;
}

.main-nav a {
  text-decoration: none;
  font-weight: 600;
  color: var(--color-text);
  padding: 0.5rem 0.25rem;
}

.main-nav a:hover, .main-nav a[aria-current="page"] {
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-border);
  padding: 0.5rem 0.75rem;
  font-size: 1.25rem;
  border-radius: 4px;
  cursor: pointer;
  color: var(--color-text);
}

/* Hero Section */
.hero {
  padding: 4rem 0 3rem;
  background: linear-gradient(180deg, #ffffff 0%, var(--color-bg) 100%);
  border-bottom: 1px solid var(--color-border);
}

.hero-content {
  max-width: 800px;
}

.badge {
  display: inline-block;
  background-color: var(--color-surface);
  color: var(--color-primary-dark);
  border: 1px solid var(--color-border);
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-size: 2.25rem;
  line-height: 1.35;
  color: var(--color-text);
  margin-bottom: 1.25rem;
}

.hero p {
  font-size: 1.1875rem;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.75rem;
  min-height: 48px;
  font-size: 1.0625rem;
  font-weight: 700;
  border-radius: 6px;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background-color var(--transition), border-color var(--transition);
}

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

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

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background-color: #e2e8f0;
  text-decoration: none;
}

/* Sections */
.section {
  padding: 4rem 0;
}

.section-alt {
  background-color: #ffffff;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-title {
  font-size: 1.875rem;
  line-height: 1.4;
  margin-bottom: 0.75rem;
  text-align: center;
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  max-width: 680px;
  margin: 0 auto 3rem;
}

/* Grid & Cards */
.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
}

.card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 2rem;
  box-shadow: 0 2px 4px rgba(15, 23, 42, 0.04);
}

.card h3 {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
  color: var(--color-primary-dark);
}

.card-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 1rem;
  color: var(--color-primary);
}

/* Steps */
.step-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  list-style: none;
  counter-reset: steps-counter;
}

.step-item {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.75rem;
  position: relative;
}

.step-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
  line-height: 1;
}

.step-item h4 {
  font-size: 1.1875rem;
  margin-bottom: 0.5rem;
}

/* Pricing Note Card */
.pricing-banner {
  background-color: #ecfdf5;
  border: 1px solid #a7f3d0;
  border-radius: 8px;
  padding: 2rem;
  margin-top: 2rem;
  text-align: center;
}

.pricing-banner h3 {
  color: #065f46;
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background-color: #ffffff;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 1.25rem 1.5rem;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question:hover {
  background-color: var(--color-surface);
}

.faq-answer {
  padding: 0 1.5rem 1.25rem;
  color: var(--color-text-muted);
}

/* Forms */
.form-container {
  max-width: 640px;
  margin: 0 auto;
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 2.25rem;
  box-shadow: 0 4px 6px rgba(15, 23, 42, 0.05);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.form-group .req {
  color: var(--color-error);
}

.form-control {
  width: 100%;
  padding: 0.875rem;
  font-size: 1.0625rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background-color: #ffffff;
  font-family: inherit;
}

.form-control:focus {
  border-color: var(--color-primary);
  outline: var(--focus-ring);
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.form-checkbox input {
  margin-top: 0.3rem;
  width: 20px;
  height: 20px;
}

.form-message {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: 4px;
  display: none;
}

.form-message.error {
  display: block;
  background-color: #fef2f2;
  border: 1px solid #fecaca;
  color: var(--color-error);
}

.form-message.success {
  display: block;
  background-color: #f0fdf4;
  border: 1px solid #bbf7d0;
  color: var(--color-success);
}

/* Legal Tables */
.legal-table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  background-color: #ffffff;
  border: 1px solid var(--color-border);
}

.legal-table th, .legal-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
  text-align: left;
}

.legal-table th {
  background-color: var(--color-surface);
  width: 32%;
  font-weight: 700;
  color: var(--color-text);
}

/* Footer */
.site-footer {
  background-color: #0f172a;
  color: #cbd5e1;
  padding: 3rem 0 2rem;
  font-size: 0.9375rem;
  border-top: 4px solid var(--color-primary);
}

.site-footer a {
  color: #93c5fd;
  text-decoration: none;
}

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

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 1.125rem;
  margin-bottom: 1rem;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-bottom {
  border-top: 1px solid #334155;
  padding-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.btn-cookie-reopen {
  background: transparent;
  border: 1px solid #64748b;
  color: #cbd5e1;
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
  border-radius: 4px;
  cursor: pointer;
}

.btn-cookie-reopen:hover {
  background: #334155;
}

/* Cookie Banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: #ffffff;
  border-top: 2px solid var(--color-primary);
  box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.15);
  padding: 1.5rem;
  z-index: 1000;
}

.cookie-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.cookie-text {
  flex: 1 1 500px;
  font-size: 0.95rem;
  color: var(--color-text);
}

.cookie-actions {
  display: flex;
  gap: 0.75rem;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Mobile Nav */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }
  .main-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background-color: #ffffff;
    border-bottom: 2px solid var(--color-border);
    padding: 1rem 1.25rem;
  }
  .main-nav.is-open {
    display: block;
  }
  .main-nav ul {
    flex-direction: column;
    gap: 0.75rem;
  }
  .hero h1 {
    font-size: 1.75rem;
  }
}