/* =========================================================
   Design tokens
   Header: clean Google Material look — white bar, soft
   elevation shadow instead of a hard line, Google blue accents.
   Everything else: Microsoft Fluent / Excel — Segoe UI,
   Excel green, tight corners, Fluent-style depth/elevation.
   ========================================================= */
:root {
  /* Header accent (Google-inspired) */
  --gblue: #1A73E8;
  --gblue-dark: #174EA6;
  --gblue-light: #E8F0FE;
  --g-hover: #F1F3F4;

  /* Body accent (Excel green) */
  --accent: #217346;
  --accent-dark: #185C37;
  --accent-light: #E9F5EE;
  --accent-line: #C3E4D1;

  /* Fluent neutrals */
  --ink: #201F1E;
  --ink-soft: #605E5C;
  --paper: #FFFFFF;
  --paper-alt: #FAF9F8;
  --line: #E1DFDD;
}

body {
  background-color: var(--paper-alt);
  color: var(--ink);
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', Arial, sans-serif;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
}

a { color: var(--accent); }
a:hover { color: var(--accent-dark); }

/* ---------- Fluent-style elevation (used on cards) ---------- */
.fluent-elevation, .tool-card, .tool-result-box, .card {
  box-shadow: 0 1.6px 3.6px rgba(0,0,0,.11), 0 0.3px 0.9px rgba(0,0,0,.09);
}

/* =========================================================
   Header — Google Material style
   ========================================================= */
.site-header {
  background: var(--paper);
  box-shadow: 0 1px 2px 0 rgba(60,64,67,.30), 0 1px 3px 1px rgba(60,64,67,.15);
  position: sticky;
  top: 0;
  z-index: 1030;
}
.site-header .navbar {
  padding-top: .55rem;
  padding-bottom: .55rem;
}
.site-header .navbar-brand {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--ink) !important;
}
.logo-frame {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .3rem .5rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: .6rem;
  box-shadow: 0 1.6px 3.6px rgba(0,0,0,.09);
}
.logo-frame img {
  height: 42px;
  width: auto;
  display: block;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: .5rem;
  background: var(--gblue);
  color: #fff;
  font-size: 1.05rem;
  flex-shrink: 0;
}
.brand-name { color: var(--ink); }
.tool-count-badge {
  background-color: var(--gblue-light);
  color: var(--gblue-dark);
  font-weight: 600;
  font-size: .7rem;
  padding: .3em .65em;
  border-radius: 1rem;
  vertical-align: middle;
}
.site-header .nav-link {
  color: var(--ink-soft) !important;
  font-weight: 500;
  font-size: .93rem;
  padding: .5rem .9rem !important;
  border-radius: 1.5rem;
  transition: background-color .15s ease, color .15s ease;
}
.site-header .nav-link:hover,
.site-header .nav-link:focus {
  background-color: var(--g-hover);
  color: var(--ink) !important;
}
.site-header .nav-link.active {
  background-color: var(--gblue-light);
  color: var(--gblue-dark) !important;
  font-weight: 600;
}
.site-header .nav-link-admin {
  color: var(--gblue) !important;
  border: 1px solid var(--gblue);
}
.site-header .nav-link-admin:hover {
  background-color: var(--gblue);
  color: #fff !important;
}

/* =========================================================
   Body — Fluent / Excel style
   ========================================================= */

/* ---------- Buttons ---------- */
.btn-accent {
  background-color: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
  border-radius: .3rem;
}
.btn-accent:hover {
  background-color: var(--accent-dark);
  border-color: var(--accent-dark);
  color: #fff;
  box-shadow: 0 1.6px 3.6px rgba(0,0,0,.16);
}
.text-accent { color: var(--accent); }

.btn { border-radius: .3rem; }

/* ---------- Form controls: green focus rings, Fluent-tight corners ---------- */
.form-control, .form-select {
  border-radius: .3rem;
  border-color: var(--line);
}
.form-control:focus,
.form-select:focus {
  border-color: var(--accent-line);
  box-shadow: 0 0 0 .2rem rgba(33,115,70,.15);
}
.form-check-input:checked {
  background-color: var(--accent);
  border-color: var(--accent);
}
.form-check-input:focus {
  border-color: var(--accent-line);
  box-shadow: 0 0 0 .2rem rgba(33,115,70,.15);
}
.btn:focus, .btn.focus,
.btn-accent:focus {
  box-shadow: 0 0 0 .2rem rgba(33,115,70,.25);
}
.form-control-color:focus {
  border-color: var(--accent-line);
  box-shadow: 0 0 0 .2rem rgba(33,115,70,.15);
}

/* ---------- Category sections on homepage ---------- */
.category-section {
  margin-bottom: 3rem;
}
.category-heading {
  display: flex;
  align-items: center;
  gap: .7rem;
  margin-bottom: 1.25rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--line);
}
.category-heading i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: .4rem;
  background: var(--accent-light);
  color: var(--accent-dark);
  font-size: 1.05rem;
}
.category-heading h2 {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 0;
  color: var(--ink);
}
.category-heading .count-pill {
  background-color: var(--paper-alt);
  border: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: .75rem;
  font-weight: 600;
  padding: .25em .75em;
  border-radius: 1rem;
}

/* ---------- Tool cards ---------- */
.tool-card {
  transition: transform .12s ease, box-shadow .12s ease, border-color .12s ease;
  border: 1px solid var(--line);
  border-radius: .4rem;
  background: var(--paper);
}
.tool-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 3.2px 7.2px rgba(0,0,0,.13), 0 0.6px 1.8px rgba(0,0,0,.11);
  border-color: var(--accent-line);
}
.tool-card .bi {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  border-radius: .5rem;
  background: var(--accent-light);
  color: var(--accent-dark);
  font-size: 1.45rem !important;
}
.tool-card .card-title {
  color: var(--ink) !important;
}

.tool-result-box {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: .4rem;
  padding: 1.5rem;
}

.card {
  border: 1px solid var(--line);
  border-radius: .4rem;
}

/* ---------- Article box: plain, straightforward reading layout ---------- */
.article-box {
  border-top: 1px solid var(--line);
  margin-top: 2.5rem;
  padding-top: 2rem;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
  font-size: 1.03rem;
  line-height: 1.7;
  color: var(--ink-soft);
}
.article-box h2, .article-box h3 {
  color: var(--ink);
}
.article-box h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 0;
}
.article-box p {
  margin-bottom: 1.1rem;
}
.article-box ul, .article-box ol {
  margin-bottom: 1.1rem;
  padding-left: 1.4rem;
}
.article-box strong {
  color: var(--ink);
}

.article-section {
  padding-bottom: 1.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--line);
}
.article-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

/* ---------- Nepali Unicode font support ---------- */
.nepali-text {
  font-family: 'Noto Sans Devanagari', 'Mangal', sans-serif;
  font-size: 1.1rem;
}

/* ---------- Footer ---------- */
footer.border-top {
  background: var(--paper);
  border-top: 1px solid var(--line) !important;
}
footer a.text-muted {
  color: var(--ink-soft) !important;
}
footer a.text-muted:hover {
  color: var(--accent-dark) !important;
}

/* ---------- AdSense ad slots ---------- */
.ad-slot {
  margin: 2rem auto;
  max-width: 100%;
  text-align: center;
  overflow: hidden;
}
.ad-slot-label {
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: #A19F9D;
  margin-bottom: .4rem;
}
.ad-slot-header {
  margin-top: 0;
  margin-bottom: 1.75rem;
}
.ad-slot-incontent {
  padding: 1.25rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.ad-slot-footer {
  margin-bottom: 0;
  padding-top: .5rem;
}