/* ============================================================
   CalcNova · Shared Navigation & Layout Styles
   Edit this file to update the header, menu, and footer
   across ALL pages at once.
   ============================================================ */

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

/* ── Design Tokens ── */
:root {
  --bg: #f0f2f7;
  --surface: #ffffff;
  --border: #e2e6ef;
  --text-primary: #0f1623;
  --text-secondary: #5a6478;
  --text-muted: #9ba3b5;
  --font: 'Plus Jakarta Sans', sans-serif;
  --mono: 'JetBrains Mono', monospace;
  --green: #10b981;
  --purple: #6366f1;
  --amber: #f59e0b;
  --red: #ef4444;
}

body.dark {
  --bg: #0d1117;
  --surface: #161b22;
  --border: #30363d;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #484f58;
}

/* ── Base ── */
html { overflow-x: hidden; }
body {
  font-family: var(--font);
  background: var(--bg);
  min-height: 100vh;
  color: var(--text-primary);
  transition: background .3s, color .3s;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(ellipse 800px 600px at 10% 0%, rgba(110,231,183,.12) 0%, transparent 60%),
    radial-gradient(ellipse 600px 500px at 90% 100%, rgba(167,139,250,.12) 0%, transparent 60%);
  transition: opacity .3s;
}
body.dark::before { opacity: .4; }

/* ── HEADER ── */
header {
  padding: 16px 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.logo-mark {
  width: 38px; height: 38px;
  background: linear-gradient(135deg, var(--green), var(--purple));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  box-shadow: 0 4px 12px rgba(99,102,241,.3);
  flex-shrink: 0;
}
.logo-text {
  font-size: 22px; font-weight: 800; letter-spacing: -.5px;
  background: linear-gradient(135deg, var(--green), var(--purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.logo-sub { font-size: 11px; color: var(--text-muted); letter-spacing: 2px; text-transform: uppercase; font-weight: 500; margin-top: 1px; }

.header-right { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.icon-btn {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  color: var(--text-secondary); font-size: 16px; width: 38px; height: 38px;
  min-height: 44px; min-width: 44px;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: all .15s; text-decoration: none; font-family: var(--font);
}
.icon-btn:hover { border-color: var(--green); color: var(--green); }

/* ── DONATE BUTTON ── */
.donate-btn {
  display: flex; align-items: center; gap: 6px;
  background: linear-gradient(135deg, #fd7e14, #e85d04);
  border: none;
  border-radius: 100px; padding: 7px 16px;
  font-size: 12px; font-weight: 700; color: #fff;
  text-decoration: none; transition: all .15s; cursor: pointer;
  font-family: var(--font);
  box-shadow: 0 2px 8px rgba(232,93,4,.35);
  min-height: 38px;
  white-space: nowrap;
}
.donate-btn:hover { transform: translateY(-1px); box-shadow: 0 4px 14px rgba(232,93,4,.45); }

/* ── NAV MENU ── */
.nav-tools-wrap { position: relative; }
.nav-tools-btn {
  display: flex; align-items: center; gap: 6px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  padding: 7px 14px; font-size: 13px; font-weight: 700; color: var(--text-primary);
  cursor: pointer; transition: all .15s; font-family: var(--font);
  min-height: 38px;
}
.nav-tools-btn:hover, .nav-tools-btn.active { border-color: var(--green); color: var(--green); }
.nav-tools-btn svg { width: 16px; height: 16px; transition: transform .2s; flex-shrink: 0; }
.nav-tools-btn.active .nav-chevron { transform: rotate(180deg); }

/* ── MEGA MENU ── */
.mega-menu {
  display: none; position: absolute; top: calc(100% + 8px); right: 0;
  width: min(720px, calc(100vw - 32px)); background: var(--surface);
  border: 1px solid var(--border); border-radius: 16px;
  box-shadow: 0 12px 40px rgba(0,0,0,.12), 0 2px 8px rgba(0,0,0,.06);
  z-index: 100; padding: 20px;
  animation: menuFadeIn .15s ease-out;
}
body.dark .mega-menu { box-shadow: 0 12px 40px rgba(0,0,0,.4), 0 2px 8px rgba(0,0,0,.2); }
.mega-menu.open { display: block; }
@keyframes menuFadeIn { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: translateY(0); } }

.mega-menu-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

.menu-cat-header { display: flex; align-items: center; gap: 8px; padding-bottom: 10px; margin-bottom: 8px; border-bottom: 1px solid var(--border); }
.menu-cat-icon { width: 28px; height: 28px; border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 14px; flex-shrink: 0; }
.menu-cat-icon.finance    { background: linear-gradient(135deg, rgba(245,158,11,.15), rgba(245,158,11,.05)); }
.menu-cat-icon.productivity { background: linear-gradient(135deg, rgba(99,102,241,.15), rgba(99,102,241,.05)); }
.menu-cat-icon.utility    { background: linear-gradient(135deg, rgba(16,185,129,.15), rgba(16,185,129,.05)); }
.menu-cat-icon.articles   { background: linear-gradient(135deg, rgba(239,68,68,.12), rgba(239,68,68,.04)); }
.menu-cat-name { font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .6px; color: var(--text-muted); }

.menu-items { list-style: none; }
.menu-item {
  display: flex; align-items: center; gap: 8px; padding: 7px 8px;
  border-radius: 8px; text-decoration: none; color: var(--text-secondary);
  font-size: 13px; font-weight: 500; transition: all .12s; cursor: default;
}
a.menu-item { cursor: pointer; }
a.menu-item:hover { background: var(--bg); color: var(--text-primary); }
.menu-item.current {
  background: linear-gradient(135deg, rgba(16,185,129,.08), rgba(99,102,241,.05));
  color: var(--green); font-weight: 700; cursor: default;
}
.menu-item-icon { font-size: 15px; flex-shrink: 0; width: 20px; text-align: center; }
.menu-item-text { flex: 1; }

/* Articles section inside mega menu */
.menu-articles { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--border); }
.menu-articles-header { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.menu-articles-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 6px 16px; list-style: none; }
.menu-articles-list a {
  display: flex; align-items: center; gap: 6px; padding: 5px 8px; border-radius: 6px;
  text-decoration: none; color: var(--text-secondary); font-size: 12px; font-weight: 500;
  transition: all .12s;
}
.menu-articles-list a:hover { background: var(--bg); color: var(--text-primary); }
.art-icon { font-size: 12px; flex-shrink: 0; }

.mega-menu-footer { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--border); text-align: center; }
.mega-menu-footer a { font-size: 12px; font-weight: 600; color: var(--text-muted); text-decoration: none; transition: color .15s; }
.mega-menu-footer a:hover { color: var(--green); }

.menu-overlay { display: none; position: fixed; inset: 0; z-index: 99; }
.menu-overlay.open { display: block; }

/* ── FOOTER ── */
.site-footer {
  border-top: 1px solid var(--border); margin-top: 48px; padding: 28px 0 16px;
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px;
}
.footer-brand { display: flex; align-items: center; gap: 8px; }
.footer-brand-name {
  font-size: 15px; font-weight: 800; letter-spacing: -.3px;
  background: linear-gradient(135deg, var(--green), var(--purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.footer-copy { font-size: 12px; color: var(--text-muted); margin-top: 3px; }
.footer-right { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.footer-links { display: flex; align-items: center; gap: 12px; }
.footer-links a { font-size: 12px; color: var(--text-muted); text-decoration: none; transition: color .15s; }
.footer-links a:hover { color: var(--green); }
.footer-disclaimer {
  font-size: 11px; color: var(--text-muted); text-align: center;
  padding-bottom: 16px; line-height: 1.6;
}

/* ── AD SLOTS ──
   To enable Google AdSense:
   1. Add your AdSense <script> tag to <head> on each page
   2. Replace the placeholder div inside .ad-slot with your <ins class="adsbygoogle"> code
   3. Remove the [data-label] pseudo-element below in production
   ── */
.ad-slot {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.ad-slot--leaderboard { min-height: 90px; margin: 12px 0 20px; }
.ad-slot--rectangle  { min-height: 250px; margin: 20px 0; }
/* Dev label — remove or hide in production */
.ad-slot::before {
  content: attr(data-label);
  font-size: 10px; font-weight: 700; color: var(--text-muted);
  letter-spacing: 1px; text-transform: uppercase; pointer-events: none;
}

/* ── MOBILE ── */
@media (max-width: 640px) {
  .mega-menu-grid { grid-template-columns: 1fr; }
  .mega-menu {
    position: fixed;
    left: 8px;
    right: 8px;
    bottom: auto;
    width: auto;
    max-height: 70vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: 14px;
  }
  .menu-articles-list { grid-template-columns: 1fr; }
  .logo-sub { display: none; }
  .nav-tools-btn span.nav-label { display: none; }
  .site-footer { flex-direction: column; align-items: flex-start; gap: 12px; }
  .footer-links { flex-wrap: wrap; gap: 8px; }
}

@media (max-width: 480px) {
  .donate-btn { padding: 6px 10px; font-size: 11px; }
}