/* ============================================
   EDU SIMÃO BLOG — Design System
   Espelha edusimao.com
   ============================================ */

:root {
  --bg:      #0A0F14;
  --surface: #111820;
  --border:  #1e2a38;
  --cyan:    #00D5F5;
  --gold:    #FFB800;
  --text:    #FAFAFA;
  --muted:   #8899aa;
  --radius:  10px;
  --font:    ui-sans-serif, system-ui, sans-serif;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
}
img { max-width: 100%; display: block; }
a { color: var(--cyan); text-decoration: none; transition: color .2s; }
a:hover { color: var(--gold); }

/* ---- Layout ---- */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ---- Navbar ---- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10,15,20,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: .9rem 0;
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.navbar-brand {
  display: flex;
  flex-direction: column;
  line-height: 1;
}
.navbar-brand .name {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: .05em;
  text-transform: uppercase;
}
.navbar-brand .sub {
  font-size: .6rem;
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: .18em;
  text-transform: uppercase;
  margin-top: 2px;
}
.navbar-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}
.navbar-links a {
  color: var(--text);
  font-size: .9rem;
  font-weight: 500;
  letter-spacing: .02em;
}
.navbar-links a:hover { color: var(--cyan); }
.btn-cta {
  background: var(--cyan);
  color: #000 !important;
  font-weight: 700;
  font-size: .85rem;
  padding: .5rem 1.2rem;
  border-radius: 99px;
  letter-spacing: .02em;
  transition: opacity .2s;
}
.btn-cta:hover { opacity: .85; color: #000 !important; }

/* ---- Hero ---- */
.hero {
  padding: 5rem 0 4rem;
  text-align: center;
  background: radial-gradient(ellipse at 50% 0%, rgba(0,213,245,.07) 0%, transparent 70%);
  border-bottom: 1px solid var(--border);
}
.hero-tag {
  display: inline-block;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
  border: 1px solid var(--border);
  padding: .3rem .9rem;
  border-radius: 99px;
  margin-bottom: 1.5rem;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1rem;
}
.hero h1 span { color: var(--cyan); }
.hero p {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 540px;
  margin: 0 auto;
}

/* ---- Posts grid ---- */
.posts-section {
  padding: 4rem 0;
}
.section-title {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 2rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--border);
}
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

/* ---- Card de post ---- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color .2s, transform .2s;
}
.card:hover {
  border-color: var(--cyan);
  transform: translateY(-3px);
}
.card-thumb {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}
.card-thumb-placeholder {
  width: 100%;
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--border) 0%, var(--surface) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 2rem;
}
.card-body { padding: 1.4rem; flex: 1; display: flex; flex-direction: column; gap: .6rem; }
.card-cat {
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cyan);
}
.card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}
.card-title:hover { color: var(--cyan); }
.card-excerpt {
  color: var(--muted);
  font-size: .9rem;
  line-height: 1.55;
  flex: 1;
}
.card-meta {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .78rem;
  color: var(--muted);
  margin-top: .4rem;
  padding-top: .8rem;
  border-top: 1px solid var(--border);
}
.card-meta span { display: flex; align-items: center; gap: .25rem; }

/* ---- Post individual ---- */
.post-header {
  padding: 4rem 0 2rem;
  border-bottom: 1px solid var(--border);
  background: radial-gradient(ellipse at 50% 0%, rgba(0,213,245,.05) 0%, transparent 60%);
}
.post-cat {
  display: inline-block;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 1rem;
}
.post-header h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1rem;
}
.post-header .meta {
  display: flex;
  gap: 1.5rem;
  color: var(--muted);
  font-size: .85rem;
}
.post-thumb {
  width: 100%;
  max-height: 460px;
  object-fit: cover;
  border-radius: var(--radius);
  margin: 2.5rem 0;
  border: 1px solid var(--border);
}
.post-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 2.5rem 0 5rem;
}
.post-content h2 { font-size: 1.6rem; margin: 2.5rem 0 1rem; color: var(--text); }
.post-content h3 { font-size: 1.25rem; margin: 2rem 0 .75rem; color: var(--text); }
.post-content p { margin-bottom: 1.4rem; color: var(--text); line-height: 1.8; }
.post-content strong { color: var(--cyan); font-weight: 700; }
.post-content a { color: var(--cyan); text-decoration: underline; }
.post-content ul, .post-content ol { margin: 0 0 1.4rem 1.5rem; }
.post-content li { margin-bottom: .5rem; color: var(--text); line-height: 1.7; }
.post-content blockquote {
  border-left: 3px solid var(--cyan);
  padding: 1rem 1.5rem;
  margin: 2rem 0;
  background: var(--surface);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--muted);
  font-style: italic;
}
.post-content code {
  background: var(--surface);
  color: var(--cyan);
  padding: .15em .4em;
  border-radius: 4px;
  font-size: .9em;
}
.post-content pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem;
  overflow-x: auto;
  margin: 1.5rem 0;
}
.post-content pre code { background: none; padding: 0; }
.post-content hr { border: none; border-top: 1px solid var(--border); margin: 2.5rem 0; }

/* ---- Back link ---- */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  color: var(--muted);
  font-size: .9rem;
  margin-bottom: 2rem;
  transition: color .2s;
}
.back-link:hover { color: var(--cyan); }

/* ---- Footer ---- */
footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
}
footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.footer-brand .name { font-weight: 800; font-size: .95rem; color: var(--text); text-transform: uppercase; }
.footer-brand .sub  { font-size: .6rem; color: var(--cyan); letter-spacing: .15em; text-transform: uppercase; }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { color: var(--muted); font-size: .85rem; }
.footer-links a:hover { color: var(--cyan); }
.footer-copy { color: var(--muted); font-size: .8rem; }

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--cyan); }

/* ---- Responsive ---- */
@media (max-width: 700px) {
  .navbar-links { display: none; }
  .posts-grid { grid-template-columns: 1fr; }
  footer .container { flex-direction: column; text-align: center; }
}