/* === PediaMilestones Global Styles === */
:root {
  --bg: #fdfdfd;
  --surface: #ffffff;
  --text: #09090b;
  --text-muted: #52525b;
  --border: #18181b;
  --primary: #18181b;
  --primary-hover: #27272a;
  
  --c-gross: #eff6ff;
  --t-gross: #1e3a8a;
  --b-gross: #2563eb;
  
  --c-fine: #fefce8;
  --t-fine: #713f12;
  --b-fine: #eab308;
  
  --c-lang: #f0fdf4;
  --t-lang: #14532d;
  --b-lang: #16a34a;
  
  --c-social: #ffffff;
  --t-social: #09090b;
  --b-social: #18181b;
  
  --c-red: #fef2f2;
  --t-red: #7f1d1d;
  --b-red: #dc2626;
  
  --nav-h: 70px;
  --radius: 16px;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
}

* { margin:0; padding:0; box-sizing:border-box; }
body { background:var(--bg); color:var(--text); font-family:'Inter',system-ui,sans-serif; -webkit-font-smoothing:antialiased; line-height:1.6; }
a { text-decoration:none; color:inherit; }

/* TOP BANNER */
.top-banner {
  position:fixed; top:0; left:0; right:0; z-index:201; height: 34px;
  background:var(--primary); color:#fff; display:flex; align-items:center; justify-content:center;
  font-size:0.85rem; font-weight:700; letter-spacing:0.5px;
}

/* NAV */
nav {
  position:fixed; top:34px; left:0; right:0; z-index:200;
  display:flex; align-items:center; justify-content:space-between;
  padding:0 2rem; height:var(--nav-h);
  background:rgba(255,255,255,0.92); backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
}
.logo { font-weight:900; font-size:1.5rem; letter-spacing:-0.08em; display:flex; align-items:center; gap:8px; }
.logo-icon { 
  background:linear-gradient(135deg, var(--primary), var(--text-muted)); 
  width:34px; height:34px; border-radius:10px; 
  display:flex; align-items:center; justify-content:center; 
  font-size:18px; color:#fff;
  animation: logo-pulse 2s infinite alternate ease-in-out;
  box-shadow:2px 2px 0px var(--border);
}
.logo span { 
  background: linear-gradient(90deg, var(--b-gross), var(--b-red), var(--b-fine), var(--b-lang), var(--b-gross));
  background-size: 200% auto;
  color: transparent;
  -webkit-background-clip: text;
  background-clip: text;
  animation: logo-shine 3s linear infinite;
  display: inline-block;
  padding-left: 1px; /* Prevents perceived gap */
}

@keyframes logo-pulse {
  0% { transform: scale(1) rotate(-5deg); filter: hue-rotate(0deg); }
  100% { transform: scale(1.08) rotate(5deg); filter: hue-rotate(45deg); }
}
@keyframes logo-shine {
  to { background-position: 200% center; }
}
.nav-links { display:flex; gap:2rem; align-items:center; }
.nav-links a { color:var(--text-muted); font-size:0.9rem; font-weight:600; transition:color 0.2s; }
.nav-links a:hover { color:var(--text); }
.mobile-menu { display:none; background:none; border:none; cursor:pointer; color:var(--text); font-size:1.5rem; }

/* APP LAYOUT */
.app-container {
  margin-top:calc(var(--nav-h) + 34px); padding:2rem;
  max-width:1200px; margin-left:auto; margin-right:auto;
  display:grid; grid-template-columns:260px 1fr; gap:2.5rem;
  min-height:calc(100vh - var(--nav-h) - 100px);
}
.page-main { margin-top:var(--nav-h); padding:4rem 2rem; max-width:800px; margin-left:auto; margin-right:auto; }

/* SIDEBAR */
.age-sidebar {
  background:var(--surface); border:1px solid var(--border);
  border-radius:var(--radius); padding:1.5rem;
  height:calc(100vh - var(--nav-h) - 4rem); position:sticky; top:calc(var(--nav-h) + 2rem);
  overflow-y:auto; box-shadow:var(--shadow);
  display:flex; flex-direction:column;
}
.sidebar-title { font-size:0.82rem; font-weight:800; text-transform:uppercase; letter-spacing:0.06em; color:var(--text-muted); margin-bottom:1rem; }
.sidebar-footer { margin-top:auto; padding-top:1rem; border-top:1px solid var(--border); }
.sidebar-stat { font-size:0.75rem; color:var(--text-muted); text-align:center; }
.age-list { display:flex; flex-direction:column; gap:0.4rem; flex:1; overflow-y:auto; }
.age-btn {
  background:var(--bg); border:1px solid transparent; width:100%; text-align:left;
  padding:0.7rem 1rem; border-radius:10px; font-size:0.9rem; font-weight:600;
  cursor:pointer; color:var(--text-muted); transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1); font-family:'Inter',sans-serif;
  display:flex; justify-content:space-between; align-items:center;
  animation: slide-in-left 0.4s cubic-bezier(0.16, 1, 0.3, 1) backwards;
}
.age-arrow { font-size:0.8rem; opacity:0.4; transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1); }
.age-btn:hover { background:var(--c-gross); color:var(--t-gross); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05); border-color: rgba(37, 99, 235, 0.2); }
.age-btn:hover .age-arrow { opacity:1; transform:translateX(4px); }
.age-btn.active { background:var(--primary); color:#fff; box-shadow:0 6px 16px rgba(24, 24, 27, 0.2); transform: scale(1.02); border-color: var(--primary); }
.age-btn.active .age-arrow { opacity:1; transform:translateX(6px); color: var(--b-fine); }

@keyframes slide-in-left {
  0% { opacity: 0; transform: translateX(-20px); }
  100% { opacity: 1; transform: translateX(0); }
}

/* CONTENT */
.content-header { margin-bottom:1.5rem; }
.content-title { font-size:2.2rem; font-weight:900; letter-spacing:-0.03em; margin-bottom:0.3rem; }
.content-subtitle { font-size:1rem; color:var(--text-muted); }

/* TOOLBAR */
.toolbar {
  display:flex; align-items:center; justify-content:space-between;
  background:var(--surface); border:1px solid var(--border);
  border-radius:12px; padding:0.8rem 1.2rem; margin-bottom:1.5rem;
  box-shadow:var(--shadow); gap:1rem; flex-wrap:wrap;
}
.toolbar-left { display:flex; align-items:center; gap:12px; }
.toolbar-right { display:flex; align-items:center; gap:8px; }
.toolbar-label { font-size:0.85rem; color:var(--text-muted); font-weight:500; }

.progress-ring {
  position:relative; width:38px; height:38px;
}
.progress-ring svg { transform:rotate(-90deg); width:100%; height:100%; }
.progress-ring #progressText {
  position:absolute; inset:0; display:flex; align-items:center; justify-content:center;
  font-size:0.6rem; font-weight:800; color:var(--primary);
}

.tool-btn {
  background:var(--surface); border:1px solid var(--border); border-radius:8px;
  padding:0.45rem 0.9rem; font-size:0.82rem; font-weight:600;
  cursor:pointer; transition:all 0.2s; font-family:'Inter',sans-serif; color:var(--text);
  box-shadow:0 1px 2px rgba(0,0,0,0.05);
}
.tool-btn:hover { background:var(--bg); border-color:var(--text-muted); color:var(--text); }
.tool-btn-primary { background:var(--primary); color:#fff; border-color:var(--primary); }
.tool-btn-primary:hover { background:var(--primary-hover); }

/* MILESTONE CARDS */
.milestone-grid { display:grid; grid-template-columns:repeat(2, 1fr); gap:1.2rem; }
.m-card { padding:1.4rem; border-radius:var(--radius); border:2px solid; }
.m-card h3 { font-size:1rem; font-weight:800; margin-bottom:0.8rem; display:flex; align-items:center; gap:8px; }
.m-card ul { list-style:none; display:flex; flex-direction:column; gap:0.3rem; }
.m-card li { 
  display:flex; align-items:flex-start; gap:10px; font-size:0.9rem; font-weight:500;
  padding:0.45rem 0.6rem; border-radius:8px; cursor:pointer; transition:all 0.15s;
}
.m-card li:hover { background:rgba(0,0,0,0.04); }

/* Checklist */
.check-box {
  width:20px; height:20px; min-width:20px; border-radius:6px;
  border:2px solid currentColor; display:flex; align-items:center;
  justify-content:center; font-size:12px; font-weight:900;
  transition:all 0.2s; opacity:0.5; margin-top:1px;
}
li.checked .check-box {
  background:currentColor; opacity:1;
}
li.checked .check-box { color:currentColor; }
li.checked .check-text { text-decoration:line-through; opacity:0.6; }
.red-dot { flex-shrink:0; }

/* Card themes */
.card-gross { background:var(--c-gross); border-color:var(--b-gross); color:var(--t-gross); }
.card-fine { background:var(--c-fine); border-color:var(--b-fine); color:var(--t-fine); }
.card-lang { background:var(--c-lang); border-color:var(--b-lang); color:var(--t-lang); }
.card-social { background:var(--c-social); border-color:var(--b-social); color:var(--t-social); }
.card-puberty { background:#f0fdfa; border-color:#99f6e4; color:#0d9488; grid-column:1 / -1; }
.card-puberty li { cursor:default; }
.card-puberty li:hover { background:rgba(13,148,136,0.06); }
.puberty-dot { font-size:1.1rem; flex-shrink:0; line-height:1; }
.card-red { background:var(--c-red); border-color:var(--b-red); color:var(--t-red); grid-column:1 / -1; margin-top:0.5rem; }
.card-red li { cursor:pointer; }
.card-red li:hover { background:rgba(185,28,28,0.06); }

/* Red flag clickable links */
.red-flag-link {
  color:var(--t-red); text-decoration:none; transition:all 0.2s;
  display:inline-flex; align-items:center; gap:4px;
}
.red-flag-link:hover { text-decoration:underline; opacity:0.85; }
.rf-arrow { font-size:0.7rem; opacity:0.5; transition:all 0.2s; }
.red-flag-link:hover .rf-arrow { opacity:1; transform:translate(2px, -2px); }

/* Age nav arrows */
.age-nav {
  display:flex; align-items:center; justify-content:space-between;
  margin-top:2rem; padding:1rem 0;
}
.nav-arrow {
  background:var(--surface); border:1px solid var(--border);
  padding:0.6rem 1.2rem; border-radius:10px; font-size:0.85rem;
  font-weight:700; cursor:pointer; transition:all 0.2s; font-family:'Inter',sans-serif; color:var(--text);
}
.nav-arrow:hover:not(:disabled) { border-color:var(--primary); color:var(--primary); }
.nav-arrow:disabled { opacity:0.3; cursor:not-allowed; }
.age-nav-label { font-size:0.85rem; color:var(--text-muted); font-weight:600; }

/* HERO REDESIGN */
.hero-section {
  display: grid; grid-template-columns: 1.2fr 1fr; gap: 3rem; align-items: center;
  background: var(--surface); border: 2px solid var(--border);
  border-radius: 24px; padding: 4rem 3rem; box-shadow: 6px 6px 0px var(--border);
  overflow: hidden; position: relative; margin-bottom: 2rem;
}
.hero-content { position: relative; z-index: 2; }
.hero-badge {
  display: inline-block; background: var(--c-fine); color: var(--t-fine);
  border: 2px solid var(--b-fine); padding: 0.4rem 1rem; border-radius: 20px;
  font-size: 0.85rem; font-weight: 800; margin-bottom: 1.5rem; text-transform: uppercase; letter-spacing: 0.5px;
}
.hero-title {
  font-size: clamp(2.5rem, 4vw, 3.2rem); font-weight: 900; line-height: 1.1;
  color: var(--text); margin-bottom: 1.5rem; letter-spacing: -1px;
}
.hero-title span { color: var(--b-gross); display: block; }
.hero-desc { font-size: 1.15rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 2.5rem; }
.hero-cta {
  background: var(--b-red); color: #fff; border: 2px solid var(--border);
  padding: 1.2rem 2.5rem; border-radius: 16px; font-size: 1.2rem; font-weight: 900;
  cursor: pointer; display: inline-flex; align-items: center; gap: 10px;
  box-shadow: 4px 4px 0px var(--border); transition: all 0.2s; font-family: 'Inter', sans-serif;
}
.hero-cta:hover { transform: translate(-2px, -2px); box-shadow: 6px 6px 0px var(--border); background: #f87171; color: #000; }
.hero-cta:active { transform: translate(2px, 2px); box-shadow: 2px 2px 0px var(--border); }
.hero-trust { display: flex; gap: 1.5rem; margin-top: 2rem; font-size: 0.9rem; font-weight: 700; color: var(--text-muted); }

.hero-illustration { position: relative; display: flex; align-items: center; justify-content: center; z-index: 1; }
.floating-svg { width: 100%; height: auto; max-width: 400px; filter: drop-shadow(4px 4px 0px var(--border)); }

/* Animations */
@keyframes blob-bounce {
  0%, 100% { transform: scale(1) translate(0, 0); }
  50% { transform: scale(1.05) translate(-10px, 10px); }
}
@keyframes block-bounce {
  0%, 100% { transform: translate(80px, 160px); }
  50% { transform: translate(80px, 140px); }
}
@keyframes rattle-float {
  0%, 100% { transform: translate(250px, 70px) rotate(15deg); }
  50% { transform: translate(250px, 60px) rotate(5deg); }
}
@keyframes sparkle-spin {
  0% { transform: rotate(0deg) scale(0.8); }
  50% { transform: rotate(180deg) scale(1.2); }
  100% { transform: rotate(360deg) scale(0.8); }
}

.blob { animation: blob-bounce 8s infinite ease-in-out; transform-origin: center; }
.bouncing-block { animation: block-bounce 4s infinite ease-in-out; }
.floating-rattle { animation: rattle-float 5s infinite ease-in-out; }
.s1 { animation: sparkle-spin 3s infinite linear; transform-origin: 180px 60px; }
.s2 { animation: sparkle-spin 4s infinite linear reverse; transform-origin: 320px 230px; }
.s3 { animation: sparkle-spin 3.5s infinite linear; transform-origin: 60px 97.5px; }

@media(max-width:900px) {
  .hero-section { grid-template-columns: 1fr; padding: 2rem 1.5rem; text-align: center; }
  .hero-title { font-size: 2.2rem; }
  .hero-desc { text-align: left; }
  .hero-badge { margin: 0 auto 1.5rem; }
  .hero-trust { justify-content: center; flex-wrap: wrap; }
  .hero-cta { width: 100%; justify-content: center; }
}

/* ECOSYSTEM */
.ecosystem-bar {
  display:flex; align-items:center; gap:12px; flex-wrap:wrap;
  margin-top:2rem; padding:1rem 1.5rem;
  background:var(--surface); border:1px solid var(--border);
  border-radius:12px; font-size:0.82rem;
}
.eco-label { font-weight:700; color:var(--text-muted); }
.eco-link { color:var(--primary); font-weight:600; transition:opacity 0.2s; }
.eco-link:hover { opacity:0.7; }

/* OVERVIEW CARD (for subpages) */
.overview-card { background:var(--surface); border:1px solid var(--border); padding:2rem; border-radius:var(--radius); margin-bottom:1rem; }
.overview-card h2 { margin-bottom:1rem; font-size:1.3rem; }

/* EDUCATIONAL MODAL */
.edu-open-btn {
  background: var(--surface); color: var(--text); border: 2px solid var(--border);
  padding: 1rem 2rem; border-radius: 14px; font-size: 1.1rem; font-weight: 800;
  cursor: pointer; font-family: 'Inter', sans-serif;
  box-shadow: 3px 3px 0px var(--border); transition: all 0.2s;
  display: inline-flex; align-items: center; gap: 10px;
}
.edu-open-btn:hover { transform: translate(-2px, -2px); box-shadow: 5px 5px 0px var(--border); background: var(--bg); }
.edu-open-btn:active { transform: translate(1px, 1px); box-shadow: 1px 1px 0px var(--border); }

.edu-modal-overlay {
  display: none; position: fixed; inset: 0; z-index: 999;
  background: rgba(0,0,0,0.55); backdrop-filter: blur(6px);
  align-items: center; justify-content: center; padding: 2rem;
}
.edu-modal {
  background: var(--surface); border: 2px solid var(--border);
  border-radius: 20px; max-width: 720px; width: 100%;
  max-height: 85vh; overflow-y: auto; padding: 2.5rem;
  box-shadow: 8px 8px 0px var(--border); position: relative;
  color: var(--text-muted); font-size: 0.95rem; line-height: 1.75;
}
.edu-close {
  position: absolute; top: 1rem; right: 1.2rem; background: none; border: none;
  font-size: 1.5rem; cursor: pointer; color: var(--text-muted); transition: color 0.2s;
  width: 36px; height: 36px; display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
}
.edu-close:hover { color: var(--b-red); background: var(--bg); }
.edu-modal-title { color: var(--text); font-size: 1.4rem; font-weight: 900; margin-bottom: 1.5rem; padding-right: 2rem; }
.edu-modal h3 { color: var(--text); font-size: 1.05rem; font-weight: 800; margin: 1.5rem 0 0.5rem; }
.edu-modal p { margin-bottom: 0.8rem; }
.edu-domain {
  background: var(--bg); border-left: 5px solid var(--border);
  border-radius: 10px; padding: 1rem 1.2rem; margin: 0.8rem 0;
}
.edu-domain h4 { color: var(--text); font-size: 1rem; font-weight: 700; margin-bottom: 0.3rem; }
.edu-domain p { margin: 0; }
.edu-modal ol { padding-left: 1.5rem; margin: 0.8rem 0; }
.edu-modal li { margin-bottom: 0.4rem; }
.edu-modal::-webkit-scrollbar { width: 6px; }
.edu-modal::-webkit-scrollbar-track { background: var(--bg); border-radius: 4px; }
.edu-modal::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 4px; }

/* RED FLAG HYBRID MODAL */
.rf-modal-overlay {
  display: none; position: fixed; inset: 0; z-index: 1000;
  background: rgba(0,0,0,0.65); backdrop-filter: blur(8px);
  align-items: center; justify-content: center; padding: 2rem;
}
.rf-modal {
  background: var(--surface); border: 2px solid var(--border);
  border-radius: 16px; max-width: 800px; width: 100%;
  max-height: 90vh; overflow-y: auto; padding: 3rem;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  position: relative; color: var(--text); font-size: 1rem; line-height: 1.7;
}
.rf-close {
  position: absolute; top: 1.5rem; right: 1.5rem; background: var(--bg); border: 1px solid var(--border);
  font-size: 1.2rem; cursor: pointer; color: var(--text-muted); transition: all 0.2s;
  width: 40px; height: 40px; display: flex; align-items: center; justify-content: center;
  border-radius: 50%; box-shadow: 2px 2px 0px var(--border);
}
.rf-close:hover { color: var(--b-red); background: #fee2e2; transform: translate(-1px, -1px); box-shadow: 3px 3px 0px var(--border); }
.rf-close:active { transform: translate(1px, 1px); box-shadow: 1px 1px 0px var(--border); }
.rf-modal::-webkit-scrollbar { width: 8px; }
.rf-modal::-webkit-scrollbar-track { background: var(--bg); border-radius: 4px; }
.rf-modal::-webkit-scrollbar-thumb { background: var(--b-red); border-radius: 4px; }

/* Injected Red Flag Content Styles Adjustment */
#rfModalContent h1 { font-size: 1.8rem; margin-bottom: 0.5rem; color: var(--text); font-weight:900; }
#rfModalContent .article-meta { font-size: 0.9rem; color: var(--primary); font-weight: 600; margin-bottom: 2rem; padding-bottom: 1rem; border-bottom: 2px solid var(--border); }
#rfModalContent h2 { font-size: 1.3rem; margin: 2rem 0 1rem; color: var(--text); font-weight:800; }
#rfModalContent h3 { font-size: 1.1rem; margin: 1.5rem 0 0.5rem; color: var(--primary); font-weight:700; }
#rfModalContent ul { padding-left: 1.5rem; margin-bottom: 1.5rem; }
#rfModalContent li { margin-bottom: 0.5rem; }

/* FOOTER */
footer { text-align:center; padding:2rem; border-top:1px solid var(--border); color:var(--text-muted); font-size:0.82rem; }
footer a { color:var(--primary); font-weight:600; }

/* ARTICLE PAGE (Red Flag standalone pages) */
.article-page { margin-top:calc(var(--nav-h) + 34px); padding:3rem 2rem; max-width:720px; margin-left:auto; margin-right:auto; }
.article-page h1 { font-size:1.8rem; font-weight:900; margin-bottom:0.5rem; color:var(--t-red); }
.article-page .article-meta { font-size:0.85rem; color:var(--text-muted); margin-bottom:2rem; }
.article-page .article-body { background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:2rem; box-shadow:var(--shadow); }
.article-page .article-body h2 { font-size:1.2rem; font-weight:800; margin:1.5rem 0 0.8rem; color:var(--text); }
.article-page .article-body p { color:var(--text-muted); line-height:1.8; margin-bottom:1rem; }
.article-page .article-body ul { padding-left:1.5rem; margin-bottom:1rem; }
.article-page .article-body li { color:var(--text-muted); margin-bottom:0.4rem; line-height:1.6; }
.article-page .back-link { display:inline-flex; align-items:center; gap:6px; margin-top:2rem; color:var(--primary); font-weight:600; font-size:0.9rem; }
.article-page .back-link:hover { opacity:0.7; }

/* MOBILE */
@media(max-width:900px) {
  .app-container { grid-template-columns:1fr; padding:1rem; gap:1rem; }
  .age-sidebar { height:auto; position:relative; top:0; padding:1rem; }
  .age-list { 
    flex-direction:row; overflow-x:auto; padding-bottom:0.5rem; flex:unset; 
    -webkit-overflow-scrolling:touch; 
    scrollbar-width:thin; scrollbar-color:var(--primary) var(--border);
  }
  .age-list::-webkit-scrollbar { height: 6px; }
  .age-list::-webkit-scrollbar-track { background: var(--bg); border-radius: 4px; border: 1px solid var(--border); }
  .age-list::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 4px; }
  .age-btn { white-space:nowrap; width:auto; padding:0.5rem 0.8rem; font-size:0.82rem; }
  .sidebar-footer { display:none; }
  .milestone-grid { grid-template-columns:1fr; }
  .nav-links { display:none; }
  .mobile-menu { display:block; }
  .nav-links.open { display:flex; flex-direction:column; position:absolute; top:100%; left:0; right:0; background:var(--surface); padding:1rem; border-bottom:1px solid var(--border); }
  .content-title { font-size:1.6rem; }
  .toolbar { flex-direction:column; align-items:flex-start; }
  .welcome-features { grid-template-columns:repeat(2, 1fr); }
  .article-page { padding:1.5rem 1rem; }
  .article-page h1 { font-size:1.4rem; }
  .article-page .article-body { padding:1.2rem; }
}

/* Small phones */
@media(max-width:480px) {
  .app-container { padding:0.5rem; }
  .age-sidebar { padding:0.8rem; }
  .age-btn { padding:0.4rem 0.6rem; font-size:0.75rem; }
  .content-title { font-size:1.3rem; }
  .content-subtitle { font-size:0.85rem; }
  .m-card { padding:1rem; }
  .m-card h3 { font-size:0.9rem; }
  .m-card li { font-size:0.82rem; padding:0.35rem 0.4rem; }
  .welcome-hero { padding:2rem 1rem; }
  .welcome-hero h2 { font-size:1.3rem; }
  .welcome-features { gap:0.5rem; }
  .wf { font-size:0.72rem; }
  .toolbar { padding:0.6rem 0.8rem; }
  .nav-arrow { padding:0.4rem 0.8rem; font-size:0.8rem; }
  nav { padding:0 1rem; }
  .logo { font-size:1.1rem; }
}