/*
 * EASI Modern Theme Override
 * Injected after styles_feeling_responsive.css
 * Design: Light body · Dark nav + footer · Cyan accent
 */

/* ── Google Font ──────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ── Design Tokens ────────────────────────────── */
:root {
  --easi-navy:       #0a1628;
  --easi-navy-mid:   #112240;
  --easi-navy-light: #1e3a5f;
  --easi-cyan:       #22d3ee;
  --easi-cyan-dim:   #0e7490;
  --easi-accent:     #38bdf8;
  --easi-green:      #4ade80;

  --body-bg:         #f8fafc;
  --body-text:       #1e293b;
  --body-muted:      #64748b;
  --border-subtle:   rgba(0,0,0,.07);

  --nav-height:      72px;
  --nav-bg:          rgba(10,22,40,.95);
  --nav-blur:        blur(18px);
  --nav-border:      rgba(34,211,238,.12);

  --radius-sm:  8px;
  --radius-md:  14px;
  --radius-lg:  20px;
  --radius-xl:  28px;

  --shadow-sm:  0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md:  0 4px 16px rgba(0,0,0,.10), 0 2px 6px rgba(0,0,0,.06);
  --shadow-lg:  0 12px 40px rgba(0,0,0,.14), 0 4px 12px rgba(0,0,0,.08);
  --shadow-xl:  0 24px 64px rgba(0,0,0,.20);

  --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Base ─────────────────────────────────────── */
html {
  scroll-behavior: smooth;
  /* NOTE: do NOT add overflow-x:hidden here — it breaks position:fixed
     elements (mobile drawer, nav) in iOS Safari and some Chromium builds */
}

body {
  font-family: 'Inter', 'Lato', sans-serif !important;
  background: var(--body-bg) !important;
  color: var(--body-text) !important;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  /* overflow-x:hidden on body is safe — does not clip position:fixed children */
  overflow-x: hidden;
}

/* Push page content below fixed nav */
body > div:not(#navigation):first-of-type,
#masthead-no-image-header,
#masthead,
#masthead-with-text,
#masthead-with-pattern,
#masthead-with-background-color {
  margin-top: 0;
}

/* ── Scrollbar ────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--body-bg); }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--easi-cyan-dim); }

/* ── Typography ───────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Inter', sans-serif !important;
  color: var(--body-text);
  letter-spacing: -0.015em;
}

h1 { font-weight: 800; }
h2 { font-weight: 700; }
h3, h4 { font-weight: 600; }

p, li, td {
  font-family: 'Inter', sans-serif !important;
  line-height: 1.75;
  color: var(--body-text);
}

a {
  color: var(--easi-cyan-dim);
  transition: color var(--transition);
}
a:hover { color: var(--easi-cyan); }

/* ── ═══════════════════════════════════════════
   MODERN NAV BAR
═══════════════════════════════════════════ */

/* Hide original Foundation nav completely */
#navigation { display: none !important; }

/* Modern nav */
#easi-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 9000;
  height: var(--nav-height);
  background: var(--nav-bg);
  backdrop-filter: var(--nav-blur);
  -webkit-backdrop-filter: var(--nav-blur);
  border-bottom: 1px solid var(--nav-border);
  box-shadow: 0 4px 24px rgba(0,0,0,.3);
  display: flex;
  align-items: center;
  padding: 0 clamp(16px, 4vw, 40px);
}

.easi-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
}

/* Logo / wordmark */
.easi-nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none !important;
  flex-shrink: 0;
}
.easi-nav-logo-badge {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--easi-cyan) 0%, var(--easi-accent) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 900;
  color: var(--easi-navy);
  box-shadow: 0 0 16px rgba(34,211,238,.35);
  letter-spacing: -1px;
  flex-shrink: 0;
}
.easi-nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}
.easi-nav-logo-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: #f0f9ff;
  letter-spacing: -0.02em;
  white-space: nowrap;
}
.easi-nav-logo-sub {
  font-size: .75rem;
  font-weight: 500;
  color: var(--easi-cyan);
  letter-spacing: .08em;
  text-transform: uppercase;
  opacity: .9;
}

/* Desktop links */
.easi-nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.easi-nav-links > li {
  position: relative;
  margin: 0;
  padding: 0;
}

.easi-nav-links > li > a {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: .875rem;
  font-weight: 500;
  color: rgba(240,249,255,.82) !important;
  text-decoration: none !important;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}
.easi-nav-links > li > a:hover {
  background: rgba(34,211,238,.1);
  color: #f0f9ff !important;
}
.easi-nav-links > li.active > a,
.easi-nav-links > li > a[aria-current="page"] {
  color: var(--easi-cyan) !important;
  background: rgba(34,211,238,.1);
}
.easi-nav-links > li.active > a::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 14px; right: 14px;
  height: 2px;
  background: var(--easi-cyan);
  border-radius: 99px;
}

/* Dropdown chevron */
.easi-nav-links > li > a .nav-chevron {
  font-size: .65rem;
  opacity: .6;
  transition: transform var(--transition);
}
.easi-nav-links > li:hover > a .nav-chevron {
  transform: rotate(180deg);
  opacity: 1;
}

/* Dropdown panel */
.easi-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 2px); /* tighter gap so hover doesn't break */
  left: 50%;
  transform: translateX(-50%);
  min-width: 200px;
  background: rgba(10,22,40,.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(34,211,238,.15);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  list-style: none;
  margin: 0;
  padding: 6px;
  z-index: 9100;
  /* invisible bridge so mouse moving from link to dropdown doesn't
     trigger a mouseleave on the parent <li> */
  padding-top: 10px;
  margin-top: -8px;
}
.easi-nav-links > li:hover .easi-dropdown,
.easi-nav-links > li:focus-within .easi-dropdown,
.easi-nav-links > li.dd-open .easi-dropdown {
  display: block;
  animation: dropFadeIn .15s ease;
}
@keyframes dropFadeIn {
  from { opacity: 0; transform: translateX(-50%) translateY(-6px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

.easi-dropdown li { margin: 0; padding: 0; }
.easi-dropdown a {
  display: block;
  padding: 10px 14px;
  font-size: .85rem;
  font-weight: 500;
  color: rgba(240,249,255,.75) !important;
  text-decoration: none !important;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
}
.easi-dropdown a:hover {
  background: rgba(34,211,238,.12);
  color: #f0f9ff !important;
}

/* CTA button */
.easi-nav-cta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.easi-nav-btn {
  padding: 8px 18px;
  background: linear-gradient(135deg, var(--easi-cyan), var(--easi-accent));
  color: var(--easi-navy) !important;
  font-size: .82rem;
  font-weight: 700;
  border-radius: 999px;
  text-decoration: none !important;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 0 16px rgba(34,211,238,.3);
  white-space: nowrap;
}
.easi-nav-btn:hover {
  opacity: .88;
  transform: translateY(-1px);
  box-shadow: 0 0 24px rgba(34,211,238,.45);
  color: var(--easi-navy) !important;
}

/* Hamburger */
.easi-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  background: rgba(34,211,238,.1);
  border: 1px solid rgba(34,211,238,.2);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 0;
  transition: background var(--transition);
}
.easi-hamburger:hover { background: rgba(34,211,238,.18); }
.easi-hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--easi-cyan);
  border-radius: 99px;
  transition: transform var(--transition), opacity var(--transition);
}
.easi-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.easi-hamburger.open span:nth-child(2) { opacity: 0; }
.easi-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile drawer */
#easi-mobile-drawer {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0; right: 0;
  background: rgba(10,22,40,.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(34,211,238,.12);
  z-index: 8999;
  padding: 12px 16px 20px;
  animation: drawerSlideDown .22s ease;
  box-shadow: 0 10px 30px rgba(0,0,0,.4);
}
#easi-mobile-drawer.open { display: block; }
@keyframes drawerSlideDown {
  from { opacity: 0; transform: translateY(-12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.easi-mobile-links {
  list-style: none;
  margin: 0;
  padding: 0;
}
.easi-mobile-links li { margin: 2px 0; }
.easi-mobile-links a {
  display: block;
  padding: 12px 16px;
  font-size: .95rem;
  font-weight: 500;
  color: rgba(240,249,255,.8) !important;
  text-decoration: none !important;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
}
.easi-mobile-links a:hover {
  background: rgba(34,211,238,.1);
  color: #f0f9ff !important;
}
.easi-mobile-links .mobile-sub a {
  padding-left: 28px;
  font-size: .88rem;
  color: rgba(240,249,255,.55) !important;
}
.easi-mobile-links .mobile-sub a:hover { color: var(--easi-cyan) !important; }
.easi-mobile-divider {
  height: 1px;
  background: rgba(255,255,255,.06);
  margin: 6px 0;
}
.easi-mobile-cta {
  margin-top: 12px;
  padding: 0 4px;
}
.easi-mobile-cta a {
  display: block;
  text-align: center;
  padding: 12px;
  background: linear-gradient(135deg, var(--easi-cyan), var(--easi-accent));
  color: var(--easi-navy) !important;
  font-weight: 700;
  border-radius: 999px;
  text-decoration: none !important;
}

/* ── Responsive nav ────────────────────────────── */
@media (max-width: 767px) {
  /* Hide desktop nav links and GitHub pill */
  .easi-nav-links { display: none !important; }
  .easi-nav-btn   { display: none !important; }

  /* Always show hamburger, never let it be pushed off-screen */
  .easi-hamburger {
    display: flex !important;
    flex-shrink: 0 !important;
  }

  /* Let the logo area compress so hamburger always has room */
  .easi-nav-logo {
    flex: 1 1 0;
    min-width: 0;
    overflow: hidden;
  }
  .easi-nav-logo-text {
    min-width: 0;
    overflow: hidden;
  }
  .easi-nav-logo-badge {
    width: 32px !important;
    height: 32px !important;
    font-size: 15px !important;
    flex-shrink: 0;
  }
  .easi-nav-logo-title {
    font-size: 0.72rem !important;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: calc(100vw - 130px); /* leave room for badge + hamburger */
  }
  .easi-nav-logo-sub {
    display: none; /* hide subtitle on mobile — too long */
  }

  /* Ensure CTA wrapper doesn't get hidden */
  .easi-nav-cta {
    flex-shrink: 0;
  }
}

/* ── ═══════════════════════════════════════════
   MASTHEAD — slim it down; nav replaces it
═══════════════════════════════════════════ */

/* Push all page content below fixed nav */
#masthead-no-image-header {
  height: 0 !important;
  min-height: 0 !important;
  overflow: hidden !important;
  padding: 0 !important;
  margin: 0 !important;
  background: transparent !important;
}

/* Pages WITH a hero image: just add a top offset so image isn't under nav */
#masthead {
  margin-top: var(--nav-height) !important;
}

/*
 * GLOBAL body top padding — pushes ALL page content below the 64px fixed nav.
 * Applied here rather than per-layout so every page type (page, page-fullwidth,
 * frontpage, post, video, blog) gets the offset automatically.
 */
html {
  scroll-padding-top: calc(var(--nav-height) + 16px);
}

body {
  padding-top: var(--nav-height) !important;
}

/* Remove the old per-layout margin overrides (now redundant) */
body.page .row.t30:first-of-type,
body.page-fullwidth .row.t30:first-of-type {
  margin-top: 32px !important;
}

/* Ensure page h1 isn't clipped when navigating via anchor */
body.post .row:first-of-type,
body.page article,
body.page-fullwidth article {
  scroll-margin-top: calc(var(--nav-height) + 16px);
}

/* ── ═══════════════════════════════════════════
   PAGE CONTENT POLISH
═══════════════════════════════════════════ */

/* Articles */
article {
  border-radius: var(--radius-lg);
}

/* Teaser / subheadline */
.teaser {
  color: var(--body-muted) !important;
  font-size: 1.1rem !important;
  line-height: 1.65 !important;
}

/* Page h1 */
article h1 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  margin-bottom: .4em;
  background: linear-gradient(135deg, var(--easi-navy) 40%, var(--easi-cyan-dim));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Tables */
table {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

/* Code */
pre, code {
  border-radius: var(--radius-sm);
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

/* Blockquote (redesign) */
blockquote {
  border-left: 3px solid var(--easi-cyan) !important;
  background: rgba(34,211,238,.04);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 16px 20px !important;
  margin: 1.5rem 0 !important;
  color: var(--body-muted) !important;
  font-style: normal !important;
}

/* ── ═══════════════════════════════════════════
   FOOTER
═══════════════════════════════════════════ */

/* Back-to-top arrow */
#up-to-top {
  background: var(--body-bg);
  padding: 40px 0 0 !important;
}
#up-to-top a {
  color: #94a3b8 !important;
  font-size: 1.2rem;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
#up-to-top a:hover {
  background: rgba(34,211,238,.1);
  color: var(--easi-cyan) !important;
}

#footer-content {
  background: var(--easi-navy) !important;
}

#footer {
  background: var(--easi-navy) !important;
  border-top: 1px solid rgba(34,211,238,.12) !important;
  padding: 48px 24px 32px !important;
}

#footer h4, #footer h5 {
  color: var(--easi-cyan) !important;
  font-family: 'Inter', sans-serif !important;
  font-size: .72rem !important;
  font-weight: 700 !important;
  letter-spacing: .14em !important;
  text-transform: uppercase !important;
  margin-bottom: 16px !important;
}

#footer p, #footer li {
  color: rgba(240,249,255,.55) !important;
  font-size: .87rem !important;
  line-height: 1.7 !important;
}

#footer a {
  color: rgba(56,189,248,.8) !important;
  transition: color var(--transition);
}
#footer a:hover { color: var(--easi-cyan) !important; }

#footer ul.no-bullet li { padding: 3px 0; }

#subfooter {
  background: #060e1a !important;
  border-top: 1px solid rgba(255,255,255,.05) !important;
  padding: 20px 24px !important;
}

#subfooter .credits a,
#subfooter .credits p {
  color: rgba(255,255,255,.3) !important;
  font-size: .78rem;
}
#subfooter .credits a:hover { color: rgba(34,211,238,.7) !important; }

/* Footer NSF logo sizing */
#footer img[src*="nsf"] {
  width: 180px !important;
  height: auto;
  opacity: .92;
  margin-bottom: 16px;
  display: block;
}

/* ── ═══════════════════════════════════════════
   GLOBAL UTILITIES
═══════════════════════════════════════════ */

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* Smooth appearance for page content */
.row { animation: pageFadeIn .4s ease; }
@keyframes pageFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}