:root {
  --ink: #1a1a18;
  --paper: #F4F3EE;
  --muted: #6B6B63;
  --border: #DDDCD7;
  --terracotta: #C8522B;
  --terracotta-hover: #d4622f;
  --terracotta-light: #FEF3EE;
  --card: #ffffff;
  --green: #2D8A4E;
  --green-light: #f0fdf4;
  --red: #c42b2b;
  --red-light: #fef2f2;
  --blue-light: #eff6ff;
  --radius: 10px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--paper);
  color: var(--ink);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
}

a { text-decoration: none; color: inherit; }

main { flex: 1; }

/* ===== HEADER / NAV ===== */
.header {
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--card);
  height: 56px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--terracotta);
  letter-spacing: -0.3px;
}

.nav-links { display: flex; gap: 2px; }

.nav-links a {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  transition: background .15s, color .15s;
}

.nav-links a:hover { background: var(--terracotta-light); color: var(--terracotta); }
.nav-links a.active { background: var(--terracotta); color: #fff; }

/* ===== LAYOUT ===== */
.section { max-width: 1020px; margin: 0 auto; padding: 0 24px; }

.container { max-width: 1020px; margin: 0 auto; padding: 24px; }

/* ===== CARDS ===== */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.accent-card {
  position: relative;
  overflow: hidden;
}
.accent-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--terracotta), #E8734A, var(--terracotta));
}

/* ===== BUTTONS ===== */
.btn {
  padding: 10px 18px;
  border: none;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background .15s, transform .1s;
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }

.btn-primary { background: var(--terracotta); color: #fff; }
.btn-primary:hover { background: var(--terracotta-hover); }

.btn-outline { background: transparent; color: var(--terracotta); border: 1.5px solid var(--border); }
.btn-outline:hover { background: var(--terracotta-light); border-color: var(--terracotta); }

.btn-danger { background: var(--red); color: #fff; }
.btn-danger:hover { background: #b32525; }

.btn-sm { padding: 6px 14px; font-size: 12px; }
.btn-lg { padding: 14px 28px; font-size: 15px; }

/* ===== INPUT ===== */
.input {
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  color: var(--ink);
  background: var(--card);
  outline: none;
  width: 100%;
  transition: border-color .2s;
}
.input:focus { border-color: var(--terracotta); }

/* ===== BADGE ===== */
.badge {
  display: inline-block;
  background: var(--terracotta);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 20px;
}
.badge-green { background: var(--green); }
.badge-yellow { background: #d4a017; }
.badge-muted { background: var(--muted); }

/* ===== TEXT HELPERS ===== */
.text-muted { color: var(--muted); }
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }

/* ===== HERO ===== */
.hero { text-align: center; margin: 24px 0; }
.hero h1 {
  font-size: clamp(22px, 3.5vw, 30px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
}
.hero p { font-size: 15px; color: var(--muted); max-width: 460px; margin: 0 auto; line-height: 1.6; }

/* ===== FEATURES ===== */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 48px;
}
.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
}
.feature-icon {
  width: 40px; height: 40px;
  background: var(--paper);
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-size: 18px;
  margin: 0 auto 12px;
}
.feature-card h3 { font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.feature-card p { font-size: 12px; color: var(--muted); line-height: 1.6; }

/* ===== GRID ===== */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

/* ===== STAT CARDS ===== */
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.stat-card .stat-value { font-size: 28px; font-weight: 800; }
.stat-card .stat-label { font-size: 13px; color: var(--muted); margin-top: 4px; }

/* ===== TABLE ===== */
table { width: 100%; border-collapse: collapse; }
table th, table td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--border); font-size: 13px; }
table th { font-weight: 600; color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .5px; }
table tr:hover { background: var(--paper); }

/* ===== TOAST ===== */
#toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(60px);
  background: var(--ink);
  color: #fff;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  pointer-events: none;
  opacity: 0;
  transition: all .3s ease;
  z-index: 999;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ===== LOADING ===== */
.loading-bar {
  display: none;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--terracotta);
  padding: 8px 14px;
  background: var(--terracotta-light);
  border-radius: 8px;
}
.loading-bar.visible { display: flex; }
.spinner {
  width: 14px; height: 14px;
  border: 2px solid #f0c4b0;
  border-top-color: var(--terracotta);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== BLOG ===== */
.blog-content h1, .blog-content h2, .blog-content h3 { margin: 20px 0 10px; }
.blog-content p { margin-bottom: 12px; }
.blog-content code { background: var(--paper); padding: 2px 6px; border-radius: 4px; font-size: 13px; }
.blog-content pre { background: var(--ink); color: #e2e8f0; padding: 16px; border-radius: 8px; overflow-x: auto; margin: 16px 0; }
.blog-content pre code { background: none; color: inherit; }
.blog-content a { color: var(--terracotta); }
.blog-content ul, .blog-content ol { margin: 12px 0 12px 24px; }
.blog-content blockquote { border-left: 3px solid var(--terracotta); padding-left: 16px; color: var(--muted); margin: 12px 0; }

/* ===== CODE BLOCK ===== */
.code-block {
  background: var(--ink);
  color: #e2e8f0;
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 12px 0;
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 13px;
  line-height: 1.5;
}

/* ===== FOOTER ===== */
footer {
  border-top: 1px solid var(--border);
  margin-top: auto;
  padding: 24px;
  font-size: 13px;
  color: var(--muted);
  text-align: center;
}
footer a { color: var(--terracotta); }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-thumb { background: #d1d0cb; border-radius: 3px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .features { grid-template-columns: 1fr; }
  .header { padding: 0 12px; gap: 10px; }
  .nav-links { gap: 6px; overflow-x: auto; white-space: nowrap; max-width: 70vw; }
  .nav-links a { padding: 8px 10px; font-size: 12px; }
}
@media (max-width: 480px) {
  .grid-4 { grid-template-columns: 1fr; }
}