/* ============================================================
   Posido Copyright & Policy Reference — Main Stylesheet
   ============================================================ */

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

:root {
  --color-white:       #ffffff;
  --color-bg:          #f8f9fb;
  --color-surface:     #ffffff;
  --color-border:      #dde2ea;
  --color-slate:       #4a5568;
  --color-slate-light: #718096;
  --color-blue:        #2b5fad;
  --color-blue-light:  #e8eef8;
  --color-blue-mid:    #3b72c8;
  --color-silver:      #edf0f5;
  --color-text:        #1a202c;
  --color-muted:       #6b7280;
  --color-strip-bg:    #1e3a6e;
  --font-sans:         'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono:         'Courier New', monospace;
  --radius:            6px;
  --shadow-sm:         0 1px 3px rgba(0,0,0,.07);
  --shadow-md:         0 4px 12px rgba(0,0,0,.09);
  --transition:        .2s ease;
  --max-w:             1140px;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--color-blue); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-blue-mid); text-decoration: underline; }

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

/* ---------- Layout Utilities ---------- */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.section    { padding: 64px 0; }
.section--alt { background: var(--color-silver); }
.divider    { border: none; border-top: 1px solid var(--color-border); margin: 0; }

/* ---------- Top Information Strip ---------- */
.info-strip {
  background: var(--color-strip-bg);
  color: rgba(255,255,255,.88);
  font-size: .78rem;
  letter-spacing: .04em;
  text-align: center;
  padding: 9px 24px;
}
.info-strip a { color: rgba(255,255,255,.75); }
.info-strip a:hover { color: #fff; }

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.logo-icon {
  width: 34px; height: 34px;
  background: var(--color-blue);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
}
.logo-icon svg { fill: #fff; }
.logo-text { font-size: 1rem; font-weight: 700; color: var(--color-text); letter-spacing: -.01em; }
.logo-text span { color: var(--color-blue); }

.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a {
  font-size: .875rem;
  font-weight: 500;
  color: var(--color-slate);
  padding: 6px 12px;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
  text-decoration: none;
}
.site-nav a:hover, .site-nav a.active {
  background: var(--color-blue-light);
  color: var(--color-blue);
  text-decoration: none;
}

.nav-cta {
  background: var(--color-blue) !important;
  color: #fff !important;
  padding: 7px 16px !important;
}
.nav-cta:hover { background: var(--color-blue-mid) !important; }

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--color-slate);
  border-radius: 2px;
  transition: var(--transition);
}

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, #f0f4fb 0%, #e8eef8 100%);
  padding: 72px 0 64px;
  border-bottom: 1px solid var(--color-border);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}

.hero-eyebrow {
  display: inline-block;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--color-blue);
  background: var(--color-blue-light);
  border: 1px solid #c3d4ef;
  border-radius: 20px;
  padding: 4px 12px;
  margin-bottom: 18px;
}

.hero-title {
  font-size: 2.1rem;
  font-weight: 800;
  line-height: 1.22;
  color: var(--color-text);
  margin-bottom: 18px;
  letter-spacing: -.02em;
}

.hero-desc {
  font-size: 1rem;
  color: var(--color-slate);
  margin-bottom: 28px;
  max-width: 480px;
}

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 28px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .875rem;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: var(--radius);
  cursor: pointer;
  border: none;
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
  text-decoration: none;
}
.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn-primary { background: var(--color-blue); color: #fff; box-shadow: 0 2px 8px rgba(43,95,173,.25); }
.btn-primary:hover { background: var(--color-blue-mid); color: #fff; }
.btn-outline { background: transparent; color: var(--color-blue); border: 1.5px solid var(--color-blue); }
.btn-outline:hover { background: var(--color-blue-light); color: var(--color-blue); }

.hero-note {
  font-size: .8rem;
  color: var(--color-muted);
  border-left: 3px solid var(--color-border);
  padding-left: 12px;
}

/* Hero right — summary blocks */
.hero-summary { display: flex; flex-direction: column; gap: 14px; }
.summary-block {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  box-shadow: var(--shadow-sm);
}
.summary-block-icon {
  width: 36px; height: 36px; flex-shrink: 0;
  background: var(--color-blue-light);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
}
.summary-block-icon svg { stroke: var(--color-blue); }
.summary-block-title { font-size: .875rem; font-weight: 700; color: var(--color-text); margin-bottom: 2px; }
.summary-block-desc  { font-size: .8rem; color: var(--color-muted); }

/* ---------- Section Headings ---------- */
.section-header { text-align: center; margin-bottom: 40px; }
.section-label {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--color-blue);
  margin-bottom: 8px;
}
.section-title { font-size: 1.65rem; font-weight: 800; color: var(--color-text); letter-spacing: -.02em; }
.section-sub   { font-size: .95rem; color: var(--color-muted); margin-top: 8px; }

/* ---------- Reference Area Cards ---------- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 22px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.card-icon {
  width: 44px; height: 44px;
  background: var(--color-blue-light);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.card-icon svg { stroke: var(--color-blue); }
.card-title { font-size: 1rem; font-weight: 700; color: var(--color-text); margin-bottom: 8px; }
.card-desc  { font-size: .85rem; color: var(--color-muted); margin-bottom: 16px; }
.card-link  { font-size: .82rem; font-weight: 600; color: var(--color-blue); }
.card-link:hover { text-decoration: underline; }

/* ---------- Reference Banner ---------- */
.ref-banner {
  background: var(--color-blue-light);
  border: 1px solid #c3d4ef;
  border-radius: var(--radius);
  padding: 28px 32px;
  display: flex;
  align-items: center;
  gap: 20px;
}
.ref-banner-icon { flex-shrink: 0; }
.ref-banner-text { font-size: .95rem; color: var(--color-slate); }
.ref-banner-text strong { color: var(--color-text); }

/* ---------- Steps ---------- */
.steps { display: flex; flex-direction: column; gap: 0; }
.step {
  display: flex;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border);
}
.step:last-child { border-bottom: none; }
.step-num {
  width: 36px; height: 36px; flex-shrink: 0;
  background: var(--color-blue);
  color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: .85rem; font-weight: 700;
}
.step-content {}
.step-title { font-size: 1rem; font-weight: 700; color: var(--color-text); margin-bottom: 4px; }
.step-desc  { font-size: .875rem; color: var(--color-muted); }

/* ---------- Page Hero (inner pages) ---------- */
.page-hero {
  background: linear-gradient(135deg, #f0f4fb 0%, #e8eef8 100%);
  border-bottom: 1px solid var(--color-border);
  padding: 52px 0 44px;
}
.page-hero-label {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--color-blue);
  margin-bottom: 10px;
}
.page-hero-title { font-size: 1.9rem; font-weight: 800; color: var(--color-text); letter-spacing: -.02em; margin-bottom: 10px; }
.page-hero-desc  { font-size: .95rem; color: var(--color-slate); max-width: 620px; }
.page-hero-meta  { font-size: .78rem; color: var(--color-muted); margin-top: 14px; }

/* ---------- Prose / Content Panels ---------- */
.content-panel {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 36px 40px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
}
.content-panel h2 {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
}
.content-panel h3 { font-size: 1rem; font-weight: 700; color: var(--color-text); margin: 20px 0 8px; }
.content-panel p  { font-size: .9rem; color: var(--color-slate); margin-bottom: 12px; }
.content-panel ul, .content-panel ol { padding-left: 22px; margin-bottom: 12px; }
.content-panel li { font-size: .9rem; color: var(--color-slate); margin-bottom: 6px; }
.content-panel a  { color: var(--color-blue); }
.content-panel blockquote {
  border-left: 3px solid var(--color-blue);
  padding: 10px 16px;
  margin: 16px 0;
  background: var(--color-blue-light);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: .88rem;
  color: var(--color-slate);
}

/* ---------- Sidebar TOC ---------- */
.page-layout { display: grid; grid-template-columns: 1fr 260px; gap: 32px; align-items: start; }
.toc-panel {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 22px 20px;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 80px;
}
.toc-title { font-size: .78rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--color-muted); margin-bottom: 12px; }
.toc-list  { list-style: none; padding: 0; }
.toc-list li { margin-bottom: 6px; }
.toc-list a { font-size: .83rem; color: var(--color-slate); display: block; padding: 4px 8px; border-radius: 4px; transition: background var(--transition), color var(--transition); }
.toc-list a:hover { background: var(--color-blue-light); color: var(--color-blue); text-decoration: none; }

/* ---------- Notice Form ---------- */
.form-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 36px 40px;
  box-shadow: var(--shadow-sm);
}
.form-note {
  font-size: .83rem;
  color: var(--color-muted);
  background: var(--color-silver);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 24px;
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: .83rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}
.form-group label span { color: #c0392b; margin-left: 2px; }
.form-control {
  width: 100%;
  padding: 9px 13px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: .875rem;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
.form-control:focus { border-color: var(--color-blue); box-shadow: 0 0 0 3px rgba(43,95,173,.12); }
textarea.form-control { resize: vertical; min-height: 110px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-submit { margin-top: 8px; }
.form-submit .btn { width: 100%; justify-content: center; padding: 12px; font-size: .9rem; }
.form-disclaimer { font-size: .75rem; color: var(--color-muted); text-align: center; margin-top: 10px; }

/* ---------- Contact Page ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.contact-info-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}
.contact-info-card h2 { font-size: 1.1rem; font-weight: 800; color: var(--color-text); margin-bottom: 20px; }
.contact-item { display: flex; gap: 14px; margin-bottom: 20px; }
.contact-item-icon {
  width: 40px; height: 40px; flex-shrink: 0;
  background: var(--color-blue-light);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
}
.contact-item-icon svg { stroke: var(--color-blue); }
.contact-item-label { font-size: .78rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--color-muted); margin-bottom: 2px; }
.contact-item-value { font-size: .9rem; color: var(--color-text); }
.contact-item-value a { color: var(--color-blue); }

/* ---------- Footer ---------- */
.site-footer {
  background: #111827;
  color: rgba(255,255,255,.65);
  padding: 52px 0 28px;
  margin-top: 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand {}
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.footer-logo-icon {
  width: 30px; height: 30px;
  background: var(--color-blue);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
}
.footer-logo-icon svg { fill: #fff; }
.footer-logo-text { font-size: .95rem; font-weight: 700; color: #fff; }
.footer-tagline { font-size: .82rem; line-height: 1.6; max-width: 260px; }
.footer-col-title { font-size: .72rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: rgba(255,255,255,.45); margin-bottom: 14px; }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 8px; }
.footer-links a { font-size: .83rem; color: rgba(255,255,255,.6); transition: color var(--transition); }
.footer-links a:hover { color: #fff; text-decoration: none; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.footer-copy { font-size: .78rem; }
.footer-legal-links { display: flex; gap: 18px; }
.footer-legal-links a { font-size: .78rem; color: rgba(255,255,255,.5); }
.footer-legal-links a:hover { color: #fff; text-decoration: none; }

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  font-size: .78rem;
  color: var(--color-muted);
  padding: 10px 0 0;
  display: flex;
  gap: 6px;
  align-items: center;
}
.breadcrumb a { color: var(--color-muted); }
.breadcrumb a:hover { color: var(--color-blue); text-decoration: none; }
.breadcrumb-sep { color: var(--color-border); }

/* ---------- Alert / Notice Banner ---------- */
.notice-alert {
  background: #fffbeb;
  border: 1px solid #f6d860;
  border-radius: var(--radius);
  padding: 14px 18px;
  font-size: .85rem;
  color: #7d6608;
  margin-bottom: 24px;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.notice-alert svg { flex-shrink: 0; margin-top: 1px; }

/* ---------- Tag Chips ---------- */
.tag {
  display: inline-block;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .04em;
  padding: 3px 9px;
  border-radius: 20px;
  background: var(--color-blue-light);
  color: var(--color-blue);
  border: 1px solid #c3d4ef;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .page-layout { grid-template-columns: 1fr; }
  .toc-panel { position: static; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .cards-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .hero-title { font-size: 1.6rem; }
  .site-nav { display: none; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: var(--color-white); border-bottom: 1px solid var(--color-border); padding: 12px 16px; gap: 4px; }
  .site-nav.open { display: flex; }
  .nav-toggle { display: flex; }
  .ref-banner { flex-direction: column; gap: 12px; }
}

@media (max-width: 480px) {
  .content-panel { padding: 22px 18px; }
  .form-card { padding: 22px 18px; }
  .section { padding: 44px 0; }
}