:root {
  --header-height: 90px;
}

/* ===============================
   RESET
   =============================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ===============================
   BODY
   =============================== */
body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: #f8fafc;
  color: #0f172a;
  padding-top: var(--header-height);
  line-height: 1.7;
  overflow-x: hidden;
}

/* ===============================
   HEADER
   =============================== */
#header {
  height: var(--header-height);
  background: #ffffff;
  border-bottom: 1px solid #e5e7eb;

  display: flex;
  align-items: center;
  justify-content: space-between;

  padding: 0 24px;
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 9999;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

#HIcon {
  width: 48px;
}

#HH1 {
  font-size: 1.5rem;
  font-weight: 700;
}

/* ===============================
   HEADER ACTIONS
   =============================== */
.header-actions {
  display: flex;
  gap: 10px;
}

#hamburger,
#darkModeToggle {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  border: 1px solid #e5e7eb;
  background: #f1f5f9;
  font-size: 1.4rem;
  cursor: pointer;
  transition: background .2s ease, transform .2s ease;
}

#hamburger:hover,
#darkModeToggle:hover {
  background: #e2e8f0;
  transform: translateY(-1px);
}

/* ===============================
   SIDE NAV (RIGHT PANEL)
   =============================== */
#nav {
  position: fixed;
  top: 0;
  right: -320px;
  width: 320px;
  height: 100vh;

  background: #ffffff;
  padding: 90px 24px;
  transition: right .3s ease;

  z-index: 10000;
  box-shadow: -20px 0 40px rgba(0,0,0,.2);
}

#nav.active {
  right: 0;
}

#navClose {
  position: absolute;
  top: 20px;
  right: 20px;

  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}

#nav ul {
  list-style: none;
}

#nav li {
  margin-bottom: 18px;
}

#nav a {
  text-decoration: none;
  font-size: 1.1rem;
  color: #0f172a;
  font-weight: 600;
}

#nav a.active {
  color: #2563eb;
}

/* ===============================
   ARTICLE
   =============================== */
.article-container {
  max-width: 900px;
  margin: 60px auto;
  padding: 40px;

  background: #dbe8f5;
  border-radius: 20px;
}

.article-title {
  font-size: 2.4rem;
  margin-bottom: 10px;
}

.article-meta {
  font-size: 0.95rem;
  color: #475569;
  margin-bottom: 30px;
}

.article-container h2 {
  margin-top: 40px;
  margin-bottom: 15px;
}

.article-container p {
  margin-bottom: 18px;
  font-size: 1.05rem;
}

.article-container ul {
  margin: 20px 0 30px 20px;
}

.article-divider {
  margin: 30px 0;
  padding: 18px;
  background: rgba(37, 99, 235, 0.08);
  border-left: 5px solid #2563eb;
  border-radius: 10px;
}

/* ===============================
   FOOTER
   =============================== */
#footer {
  text-align: center;
  padding: 40px 20px;
  margin-top: 60px;
  color: #475569;
}

/* ===============================
   DARK MODE
   =============================== */
body.dark-mode {
  background: #0f172a;
  color: #e5e7eb;
}

body.dark-mode #header,
body.dark-mode #nav {
  background: #1e293b;
  border-color: #334155;
}

body.dark-mode .article-container {
  background: #1e293b;
}

body.dark-mode a {
  color: #93c5fd;
}

/* ===============================
   ANIMATION
   =============================== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: .6s ease;
}

.reveal.active {
  opacity: 1;
  transform: none;
}

/* ===============================
   RESPONSIVE
   =============================== */
@media (max-width: 768px) {
  .article-container {
    margin: 40px 16px;
    padding: 30px;
  }

  .article-title {
    font-size: 2rem;
  }
}
/* ===============================
   ADMIN + BLOG ADDITIONS
   =============================== */

.admin-box {
  max-width: 720px;
  margin: 40px auto;
  background: #dbe8f5;
  padding: 30px;
  border-radius: 20px;
}

.admin-box input {
  width: 100%;
  padding: 12px;
  margin-bottom: 14px;
  border-radius: 10px;
  border: 1px solid #cbd5f5;
  font-size: 1rem;
}

.admin-box button {
  padding: 12px 16px;
  border-radius: 12px;
  border: none;
  font-weight: 700;
  cursor: pointer;
  background: #2563eb;
  color: white;
}

.admin-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
}

.admin-row img {
  width: 64px;
  height: 42px;
  object-fit: cover;
  border-radius: 8px;
}

.admin-row button {
  background: #dc2626;
}

/* BLOG GRID */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill,minmax(280px,1fr));
  gap: 24px;
  max-width: 1200px;
  margin: 60px auto;
  padding: 0 20px;
}

.blog-card {
  background: #dbe8f5;
  border-radius: 20px;
  overflow: hidden;
  cursor: pointer;
  transition: .2s ease;
}

.blog-card:hover {
  transform: translateY(-4px);
}

.blog-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.blog-card h3 {
  padding: 16px;
  font-size: 1.2rem;
}