/* ============================================================
   STAR AI EDUCATION — BLOG PAGE STYLESHEET
   Matches main site dark theme exactly
   ============================================================ */

:root {
  --primary: #4f46e5;
  --primary-dark: #3730a3;
  --primary-light: #818cf8;
  --accent: #06b6d4;
  --accent-2: #f59e0b;
  --dark: #0f0f1a;
  --dark-2: #13132b;
  --dark-3: #1a1a35;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --white: #ffffff;
  --card-bg: rgba(255,255,255,0.04);
  --card-border: rgba(255,255,255,0.08);
  --gradient-1: linear-gradient(135deg, #4f46e5, #06b6d4);
  --gradient-2: linear-gradient(135deg, #6366f1, #a855f7);
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 8px 32px rgba(0,0,0,0.3);
  --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--dark);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 { font-family: 'Syne', sans-serif; }
a { text-decoration: none; color: inherit; }
a:hover { color: var(--primary-light); }
img { max-width: 100%; height: auto; display: block; }
::selection { background: var(--primary); color: #fff; }
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--dark-2); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }

/* ---- NAVBAR ---- */
#mainNav {
  background: rgba(15,15,26,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 14px 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}
.brand-logo { display: flex; align-items: center; gap: 12px; }
.logo-icon {
  width: 44px; height: 44px;
  background: var(--gradient-1);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; color: #fff;
  box-shadow: 0 4px 15px rgba(79,70,229,0.4);
  flex-shrink: 0;
}
.brand-text { display: flex; flex-direction: column; }
.brand-name { font-family: 'Syne', sans-serif; font-weight: 800; font-size: 1.15rem; color: var(--white); line-height: 1.1; }
.brand-tag { font-size: 0.6rem; color: var(--accent); font-weight: 500; letter-spacing: 0.05em; text-transform: uppercase; }
.nav-link { color: var(--text-muted) !important; font-weight: 500; padding: 8px 14px !important; font-size: 0.9rem; transition: var(--transition); }
.nav-link:hover { color: var(--white) !important; }
.btn-enroll {
  background: var(--gradient-1); color: #fff !important;
  padding: 10px 22px !important; border-radius: 50px;
  font-weight: 600; font-size: 0.88rem;
  box-shadow: 0 4px 15px rgba(79,70,229,0.3);
}
.btn-enroll:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(79,70,229,0.5); }
.hamburger-icon { display: flex; flex-direction: column; gap: 5px; padding: 4px; }
.hamburger-icon span { display: block; width: 22px; height: 2px; background: var(--white); border-radius: 2px; }
.navbar-toggler { border: 1px solid rgba(255,255,255,0.15); background: transparent; padding: 8px; border-radius: 8px; }
.navbar-toggler:focus { box-shadow: none; }

/* ---- BLOG HERO ---- */
.blog-hero {
  position: relative;
  padding: 80px 0 60px;
  background: var(--dark-2);
  overflow: hidden;
}
.blog-hero::before {
  content: '';
  position: absolute;
  top: -200px; left: -200px;
  width: 600px; height: 600px;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.12;
}
.blog-breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.82rem; color: var(--text-muted);
  margin-bottom: 20px;
}
.blog-breadcrumb a { color: var(--primary-light); }
.blog-breadcrumb i { font-size: 0.65rem; }
.blog-hero-tag {
  display: inline-flex; align-items: center;
  background: rgba(79,70,229,0.15);
  border: 1px solid rgba(79,70,229,0.4);
  color: var(--primary-light);
  font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  padding: 5px 14px; border-radius: 100px;
  margin-bottom: 18px;
}
.blog-hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800; color: var(--white);
  line-height: 1.2; margin-bottom: 20px;
}
.gradient-text {
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.blog-meta-row {
  display: flex; flex-wrap: wrap; gap: 20px;
  align-items: center; margin-bottom: 24px;
}
.blog-meta-item { display: flex; align-items: center; gap: 7px; color: var(--text-muted); font-size: 0.83rem; }
.blog-meta-item i { color: var(--primary-light); }
.blog-hero-desc { color: var(--text-muted); font-size: 1.05rem; max-width: 750px; line-height: 1.8; }

/* ---- BLOG CONTENT ---- */
.blog-content-wrapper { padding: 70px 0; }

.blog-article {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 48px;
  margin-bottom: 40px;
}

.blog-article h2 {
  font-size: 1.55rem; font-weight: 800;
  color: var(--white); margin: 40px 0 16px;
  padding-left: 16px;
  border-left: 3px solid var(--primary);
}
.blog-article h2:first-child { margin-top: 0; }

.blog-article h3 {
  font-size: 1.2rem; font-weight: 700;
  color: var(--primary-light); margin: 28px 0 12px;
}

.blog-article p {
  color: var(--text-muted); line-height: 1.85;
  margin-bottom: 18px; font-size: 1rem;
}

.blog-article ul, .blog-article ol {
  color: var(--text-muted); padding-left: 22px;
  margin-bottom: 20px; line-height: 1.85;
}
.blog-article ul li, .blog-article ol li {
  margin-bottom: 8px; font-size: 0.97rem;
}
.blog-article ul li::marker { color: var(--primary-light); }
.blog-article ol li::marker { color: var(--primary-light); font-weight: 700; }

.blog-article strong { color: var(--white); font-weight: 600; }

/* Highlight box */
.highlight-box {
  background: rgba(79,70,229,0.1);
  border: 1px solid rgba(79,70,229,0.3);
  border-radius: var(--radius-sm);
  padding: 22px 26px;
  margin: 28px 0;
}
.highlight-box.success { background: rgba(16,185,129,0.08); border-color: rgba(16,185,129,0.3); }
.highlight-box.warning { background: rgba(245,158,11,0.08); border-color: rgba(245,158,11,0.3); }

.highlight-box p { margin: 0; }

/* Info cards grid */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px; margin: 28px 0;
}
.info-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-sm);
  padding: 20px;
  text-align: center;
  transition: var(--transition);
}
.info-card:hover { border-color: rgba(79,70,229,0.4); transform: translateY(-3px); }
.info-card i { font-size: 1.8rem; margin-bottom: 10px; color: var(--primary-light); }
.info-card strong { display: block; color: var(--white); font-size: 1.1rem; margin-bottom: 4px; }
.info-card span { font-size: 0.8rem; color: var(--text-muted); }

/* Table */
.blog-table { width: 100%; border-collapse: collapse; margin: 28px 0; overflow: hidden; border-radius: 10px; }
.blog-table th {
  background: rgba(79,70,229,0.2);
  color: var(--white); font-weight: 600;
  padding: 14px 18px; text-align: left; font-size: 0.88rem;
  border-bottom: 1px solid rgba(79,70,229,0.3);
}
.blog-table td {
  padding: 12px 18px; color: var(--text-muted);
  font-size: 0.9rem; border-bottom: 1px solid rgba(255,255,255,0.06);
}
.blog-table tr:hover td { background: rgba(255,255,255,0.03); color: var(--white); }
.blog-table tr:last-child td { border-bottom: none; }

/* FAQ */
.faq-section { margin: 40px 0; }
.faq-item {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
}
.faq-question {
  width: 100%; display: flex; justify-content: space-between; align-items: center;
  padding: 18px 22px; background: transparent; border: none;
  color: var(--white); font-family: 'Syne', sans-serif;
  font-weight: 700; font-size: 0.95rem; cursor: pointer;
  text-align: left; gap: 12px; transition: var(--transition);
}
.faq-question:hover { color: var(--primary-light); }
.faq-question i { color: var(--primary-light); font-size: 0.8rem; transition: transform 0.3s ease; flex-shrink: 0; }
.faq-question.open i { transform: rotate(180deg); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height 0.4s ease;
  padding: 0 22px;
}
.faq-answer.open { max-height: 300px; padding: 0 22px 18px; }
.faq-answer p { color: var(--text-muted); font-size: 0.92rem; margin: 0; }

/* CTA BOX */
.blog-cta-box {
  background: linear-gradient(135deg, rgba(79,70,229,0.2), rgba(6,182,212,0.15));
  border: 1px solid rgba(79,70,229,0.4);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
  margin-top: 40px;
}
.blog-cta-box h3 { color: var(--white); font-size: 1.5rem; margin-bottom: 12px; }
.blog-cta-box p { color: var(--text-muted); margin-bottom: 24px; max-width: 500px; margin-left: auto; margin-right: auto; }
.blog-cta-box .cta-btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn-primary-glow {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--gradient-1); color: #fff;
  padding: 13px 28px; border-radius: 50px;
  font-weight: 600; font-size: 0.92rem;
  box-shadow: 0 4px 20px rgba(79,70,229,0.35);
  transition: var(--transition); border: none;
}
.btn-primary-glow:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(79,70,229,0.5); color: #fff; }
.btn-outline-glow {
  display: inline-flex; align-items: center; gap: 8px;
  background: transparent; color: var(--primary-light);
  padding: 13px 28px; border-radius: 50px;
  font-weight: 600; font-size: 0.92rem;
  border: 1px solid rgba(79,70,229,0.5);
  transition: var(--transition);
}
.btn-outline-glow:hover { background: rgba(79,70,229,0.15); color: var(--white); transform: translateY(-2px); }

/* SIDEBAR */
.blog-sidebar { position: sticky; top: 90px; }

.sidebar-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 24px;
}
.sidebar-card h4 {
  color: var(--white); font-size: 1rem;
  font-weight: 800; margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-contact-item {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  color: var(--text-muted); font-size: 0.85rem;
}
.sidebar-contact-item:last-child { border-bottom: none; }
.sidebar-contact-item i { color: var(--primary-light); width: 18px; }
.sidebar-contact-item a { color: var(--text-muted); }
.sidebar-contact-item a:hover { color: var(--accent); }

.related-post {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.related-post:last-child { border-bottom: none; }
.rp-icon {
  width: 42px; height: 42px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; flex-shrink: 0;
}
.rp-text a { color: var(--text); font-size: 0.83rem; font-weight: 600; line-height: 1.4; display: block; margin-bottom: 2px; }
.rp-text a:hover { color: var(--primary-light); }
.rp-text small { color: var(--text-muted); font-size: 0.72rem; }

.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-cloud a {
  display: inline-block;
  background: rgba(79,70,229,0.12);
  border: 1px solid rgba(79,70,229,0.25);
  color: var(--primary-light);
  padding: 5px 12px; border-radius: 50px;
  font-size: 0.75rem; font-weight: 500;
  transition: var(--transition);
}
.tag-cloud a:hover { background: rgba(79,70,229,0.25); color: var(--white); }

/* AUTHOR BOX */
.author-box {
  display: flex; gap: 18px; align-items: flex-start;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-sm);
  padding: 24px; margin: 32px 0;
}
.author-avatar {
  width: 58px; height: 58px; border-radius: 50%;
  background: var(--gradient-1);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; color: #fff; flex-shrink: 0;
}
.author-info h5 { color: var(--white); font-size: 1rem; margin-bottom: 4px; }
.author-info small { color: var(--primary-light); font-size: 0.78rem; display: block; margin-bottom: 8px; }
.author-info p { color: var(--text-muted); font-size: 0.85rem; margin: 0; }

/* FOOTER */
.main-footer { background: var(--dark-3); border-top: 1px solid rgba(255,255,255,0.06); }
.footer-top { padding: 60px 0 40px; }
.footer-desc { color: var(--text-muted); font-size: 0.88rem; line-height: 1.7; margin-bottom: 20px; }
.footer-heading { color: var(--white); font-size: 0.9rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 18px; }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: 9px; }
.footer-links a { color: var(--text-muted); font-size: 0.88rem; transition: var(--transition); display: flex; align-items: center; gap: 6px; }
.footer-links a:hover { color: var(--primary-light); padding-left: 4px; }
.footer-links a::before { content: '›'; color: rgba(79,70,229,0.5); font-size: 1rem; }
.footer-contact { list-style: none; padding: 0; margin: 0; }
.footer-contact li { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 12px; color: var(--text-muted); font-size: 0.85rem; }
.footer-contact i { color: var(--primary-light); margin-top: 3px; flex-shrink: 0; width: 14px; }
.footer-contact a { color: var(--text-muted); }
.footer-contact a:hover { color: var(--accent); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding: 18px 0; }
.footer-bottom p { color: rgba(148,163,184,0.5); font-size: 0.82rem; margin: 0; }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 36px; height: 36px; background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1); border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted); font-size: 0.85rem; transition: var(--transition);
}
.footer-social a:hover { background: var(--gradient-1); border-color: transparent; color: #fff; transform: translateY(-2px); }

/* FLOATING */
.whatsapp-fab {
  position: fixed; bottom: 80px; right: 24px;
  width: 54px; height: 54px; background: #25D366;
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; color: #fff;
  box-shadow: 0 6px 20px rgba(37,211,102,0.4);
  z-index: 999; transition: var(--transition);
}
.whatsapp-fab:hover { transform: scale(1.1) translateY(-3px); color: #fff; }
.back-to-top {
  position: fixed; bottom: 24px; right: 24px;
  width: 44px; height: 44px; background: var(--gradient-1);
  border: none; border-radius: 12px; color: #fff;
  font-size: 0.85rem; cursor: pointer; z-index: 999;
  opacity: 0; visibility: hidden; transition: var(--transition);
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { transform: translateY(-3px); }

/* RESPONSIVE */
@media (max-width: 991px) {
  .blog-sidebar { position: static; }
  .blog-article { padding: 28px; }
}
@media (max-width: 767px) {
  .blog-hero { padding: 50px 0 40px; }
  .blog-article { padding: 20px; }
  .blog-cta-box { padding: 28px 20px; }
  .info-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 575px) {
  .blog-meta-row { gap: 12px; }
  .info-grid { grid-template-columns: 1fr; }
}