/* docs/theme.css */
/* ===== Color system (light & dark) using CSS variables ===== */
:root{
  --bg:#ffffff;
  --text:#0f172a;
  --card:#ffffff;
  --border:#e5e7eb;
  --muted:#6b7280;
  --link:#0a7cff;
  --link-hover:#075fcc;
  --shadow:0 6px 20px rgba(0,0,0,.06);
}

[data-theme="dark"]{
  --bg:#0b0f14;
  --text:#e6e9ee;
  --card:#0f141b;
  --border:#1f2a37;
  --muted:#9aa4b2;
  --link:#5aa8ff;
  --link-hover:#8cc2ff;
  --shadow:0 6px 24px rgba(0,0,0,.5);
}

/* ===== Base ===== */
html, body { background: var(--bg); color: var(--text); }
a { color: var(--link); }
a:hover { color: var(--link-hover); }
.muted, .muted * { color: var(--muted) !important; }

.card { background: var(--card); border:1px solid var(--border); box-shadow: var(--shadow); border-radius: 16px; padding: 16px; }
header, footer { background: var(--card); border-bottom:1px solid var(--border); }
footer { border-top:1px solid var(--border); }

/* ===== Header nav links (force readable hover) ===== */
header nav{ display:flex; flex-wrap:wrap; align-items:center; gap:14px; }
header nav a,
header nav a:link,
header nav a:visited{
  color: var(--text) !important;
  text-decoration: none;
  font-weight: 600;
  padding: 6px 8px;
  border-radius: 10px;
  border: 1px solid transparent;
  transition: color .15s ease, background .15s ease, border-color .15s ease;
}
/* kill any global "a:hover {color:#fff}" rules */
header nav a:hover{
  color: var(--link) !important;
  background: transparent !important;
  border-color: var(--border) !important;
}
header nav a.active{
  font-weight: 800;
  border-color: var(--text) !important;
}

/* ===== Buttons (anchor or button elements) ===== */
.btn, .btn:link, .btn:visited,
a.btn, a.btn:link, a.btn:visited,
button.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:10px 16px; border-radius:12px; font-weight:700; text-decoration:none;
  border:1px solid transparent; cursor:pointer; line-height:1;
  background: var(--text) !important;       /* dark fill */
  color: var(--bg) !important;              /* light text */
  box-shadow: var(--shadow);
  transition: background .15s ease, color .15s ease, border-color .15s ease, transform .06s ease;
}
/* hover state: stay readable */
.btn:hover, a.btn:hover, button.btn:hover{
  background: var(--link) !important;
  color: #ffffff !important;
  border-color: var(--link) !important;
}
[data-theme="dark"] .btn:hover,
[data-theme="dark"] a.btn:hover,
[data-theme="dark"] button.btn:hover{
  /* In dark theme the link color is light; keep high contrast text */
  color: #0b0f14 !important;
}

/* Secondary buttons */
.btn.sec, a.btn.sec, button.btn.sec{
  background: transparent !important;
  color: var(--text) !important;
  border-color: var(--border) !important;
}
.btn.sec:hover, a.btn.sec:hover, button.btn.sec:hover{
  background: var(--card) !important;
  border-color: var(--text) !important;
  color: var(--text) !important;
}

/* Make toolbar buttons wrap nicely */
.toolbar{display:flex; gap:10px; flex-wrap:wrap;}

/* ===== Theme toggle button ===== */
.theme-toggle{
  appearance:none; cursor:pointer; border:1px solid var(--border) !important;
  background:var(--card) !important; color:var(--text) !important;
  border-radius:999px; padding:8px 12px; line-height:1; font-weight:700;
  display:inline-flex; align-items:center; gap:8px;
  box-shadow: var(--shadow); transition:transform .08s ease, background .15s ease, color .15s ease, border-color .15s ease;
}
.theme-toggle:hover{ border-color: var(--text) !important; }
.theme-toggle:active{ transform: translateY(1px); }
.theme-toggle .sun{ display:inline-block; }
.theme-toggle .moon{ display:none; }
[data-theme="dark"] .theme-toggle .sun{ display:none; }
[data-theme="dark"] .theme-toggle .moon{ display:inline-block; }

/* ===== Headings ===== */
.section h1, .section h2, .section h3 { color: var(--text); }

/* ===== Small screens ===== */
@media (max-width: 520px){
  header nav{ gap:10px; }
  .theme-toggle{ padding:8px 10px; }
}