/* ============================================================
   NORTH CLASS — BASE
   Reset, typography, shared layout, navbar, footer, buttons,
   forms and the core "liquid glass" surface component.
   ============================================================ */

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: auto; }
html.has-lenis{ scroll-behavior: auto; }

body{
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-md);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background var(--dur-med) var(--ease-out), color var(--dur-med) var(--ease-out);
  overflow-x: hidden;
}

img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
button{ font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
input, textarea, select{ font: inherit; color: inherit; }
ul{ margin: 0; padding: 0; list-style: none; }
h1,h2,h3,h4,p{ margin: 0; }

h1,h2,h3,h4{
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.12;
}

::selection{ background: var(--aurora-violet); color: #fff; }

:focus-visible{
  outline: 2px solid var(--aurora-green);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link{
  position: fixed;
  top: -100px; left: 1rem;
  z-index: 999;
  background: var(--bg-elevated);
  color: var(--ink);
  padding: .75rem 1.25rem;
  border-radius: var(--r-sm);
  border: 1px solid var(--glass-border);
  transition: top .2s var(--ease-out);
}
.skip-link:focus{ top: 1rem; }

@media (prefers-reduced-motion: reduce){
  *, *::before, *::after{
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------------- Layout helpers ---------------- */
.container{
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-md);
}

.section{ padding-block: var(--sp-2xl); position: relative; }
.section--tight{ padding-block: var(--sp-xl); }

.eyebrow{
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-mono);
  font-size: var(--fs-2xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.eyebrow::before{
  content: "";
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--aurora-gradient);
}

.section-head{
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--sp-md);
  margin-bottom: var(--sp-lg);
}
.section-head h2{ font-size: var(--fs-2xl); }
.section-head p{ color: var(--ink-muted); max-width: 46ch; }

.text-gradient{
  background: var(--aurora-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------------- Liquid glass surface ---------------- */
.glass{
  position: relative;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-md);
  backdrop-filter: blur(22px) saturate(140%);
  -webkit-backdrop-filter: blur(22px) saturate(140%);
  box-shadow: var(--glass-shadow), inset 0 1px 0 0 rgba(255,255,255,0.08);
  overflow: hidden;
}
.glass::before{
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(155deg, var(--glass-highlight), transparent 38%);
  opacity: 0.06;
  pointer-events: none;
}
.glass--strong{ background: var(--glass-bg-strong); }

/* ---------------- Buttons ---------------- */
.btn{
  --btn-fg: var(--ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55rem;
  padding: .85rem 1.6rem;
  border-radius: var(--r-pill);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--fs-sm);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--btn-fg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: transform var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
  white-space: nowrap;
}
.btn:hover{ transform: translateY(-2px); border-color: rgba(255,255,255,0.3); }
.btn:active{ transform: translateY(0); }
.btn svg{ width: 18px; height: 18px; }

.btn--primary{
  background: var(--aurora-gradient);
  color: #050611;
  border: none;
  box-shadow: 0 12px 30px -10px rgba(139,107,255,0.55);
}
.btn--primary:hover{ box-shadow: 0 16px 36px -10px rgba(139,107,255,0.7); }

.btn--ghost{ background: transparent; }
.btn--sm{ padding: .55rem 1.1rem; font-size: var(--fs-xs); }

.icon-btn{
  display: grid;
  place-items: center;
  width: 42px; height: 42px;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: transform var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
  flex-shrink: 0;
}
.icon-btn:hover{ transform: translateY(-2px) scale(1.04); border-color: rgba(255,255,255,0.3); }
.icon-btn svg{ width: 19px; height: 19px; stroke: currentColor; }
.icon-btn .icon-off{ display: none; }
.icon-btn[data-active="false"] .icon-on{ display: none; }
.icon-btn[data-active="false"] .icon-off{ display: block; }

/* ---------------- Navbar ---------------- */
.navbar{
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 60;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: background var(--dur-med) var(--ease-out), border-color var(--dur-med) var(--ease-out), backdrop-filter var(--dur-med);
}
.navbar__inner{
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-md);
}
.navbar.is-scrolled{
  background: var(--scrim);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 1px solid var(--glass-border);
}

.navbar__brand{
  display: flex;
  align-items: center;
  gap: .65rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}
.navbar__logo{ width: 34px; height: 34px; }
.navbar__title{ display: inline; }

.navbar__nav{
  display: flex;
  align-items: center;
  gap: var(--sp-lg);
  font-size: var(--fs-sm);
  font-weight: 500;
}
.navbar__link{
  position: relative;
  color: var(--ink-muted);
  padding-block: .35rem;
  transition: color var(--dur-fast) var(--ease-out);
}
.navbar__link::after{
  content: "";
  position: absolute; left: 0; right: 100%; bottom: -2px;
  height: 2px;
  background: var(--aurora-gradient);
  border-radius: 2px;
  transition: right var(--dur-med) var(--ease-out);
}
.navbar__link:hover{ color: var(--ink); }
.navbar__link:hover::after,
.navbar__link[aria-current="page"]::after{ right: 0; }
.navbar__link[aria-current="page"]{ color: var(--ink); }

.navbar__actions{ display: flex; align-items: center; gap: .6rem; }
.navbar__burger{ display: none; }

.navbar__mobile-panel{
  position: fixed;
  inset: var(--nav-h) 0 0 0;
  z-index: 55;
  padding: var(--sp-lg) var(--sp-md);
  background: var(--scrim);
  backdrop-filter: blur(26px) saturate(140%);
  -webkit-backdrop-filter: blur(26px) saturate(140%);
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
  transform: translateY(-8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-med) var(--ease-out), transform var(--dur-med) var(--ease-out), visibility var(--dur-med);
}
.navbar__mobile-panel.is-open{
  opacity: 1; visibility: visible; transform: translateY(0);
}
.navbar__mobile-panel a{
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  padding-block: .5rem;
  border-bottom: 1px solid var(--glass-border);
  color: var(--ink);
}

/* ---------------- Scroll progress ---------------- */
.scroll-progress{
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: var(--aurora-gradient);
  z-index: 70;
  box-shadow: 0 0 12px rgba(139,107,255,0.6);
}

/* ---------------- Back to top ---------------- */
.back-to-top{
  position: fixed;
  right: var(--sp-md);
  bottom: var(--sp-md);
  z-index: 50;
  width: 48px; height: 48px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--glass-bg-strong);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  opacity: 0;
  transform: translateY(12px) scale(.9);
  pointer-events: none;
  transition: opacity var(--dur-med) var(--ease-out), transform var(--dur-med) var(--ease-out);
}
.back-to-top.is-visible{ opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }
.back-to-top svg{ width: 20px; height: 20px; }

/* ---------------- Footer ---------------- */
.site-footer{
  position: relative;
  border-top: 1px solid var(--glass-border);
  padding-block: var(--sp-xl) var(--sp-lg);
  margin-top: var(--sp-2xl);
}
.site-footer__inner{
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-md);
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: var(--sp-lg);
}
.site-footer__title{ font-family: var(--font-display); font-weight: 700; font-size: 1.3rem; }
.site-footer__motto{ color: var(--ink-muted); margin-top: .4rem; }
.site-footer h4{ font-size: var(--fs-xs); text-transform: uppercase; letter-spacing: .1em; color: var(--ink-faint); margin-bottom: .85rem; }
.site-footer__links{ display: flex; flex-direction: column; gap: .55rem; }
.site-footer__links a{ color: var(--ink-muted); font-size: var(--fs-sm); transition: color var(--dur-fast); }
.site-footer__links a:hover{ color: var(--ink); }
.site-footer__socials{ display: flex; flex-wrap: wrap; gap: .55rem; }
.site-footer__bottom{
  max-width: var(--container);
  margin: var(--sp-lg) auto 0;
  padding-inline: var(--sp-md);
  padding-top: var(--sp-md);
  border-top: 1px solid var(--glass-border);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: .5rem;
  color: var(--ink-faint);
  font-size: var(--fs-xs);
}

/* ---------------- Forms ---------------- */
.field{ display: flex; flex-direction: column; gap: .5rem; margin-bottom: var(--sp-sm); }
.field label{ font-size: var(--fs-xs); color: var(--ink-muted); font-weight: 600; }
.field input, .field textarea, .field select{
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-sm);
  padding: .85rem 1rem;
  color: var(--ink);
  transition: border-color var(--dur-fast), background var(--dur-fast);
}
.field input:focus, .field textarea:focus, .field select:focus{
  border-color: var(--aurora-violet);
  background: var(--glass-bg-strong);
}
.field textarea{ resize: vertical; min-height: 120px; }

/* ---------------- Empty states ---------------- */
.empty-state{
  text-align: center;
  padding: var(--sp-2xl) var(--sp-md);
  color: var(--ink-muted);
}
.empty-state__icon{ width: 52px; height: 52px; margin: 0 auto var(--sp-sm); opacity: .6; }
.empty-state__icon svg{ width: 100%; height: 100%; }

/* Safety-net sizing for any icon injected into a bare [data-icon] element
   that isn't inside a more specific component (.icon-btn, .btn, etc.) */
[data-icon] svg{ width: 16px; height: 16px; flex-shrink: 0; }
.empty-state h3{ color: var(--ink); font-size: var(--fs-lg); margin-bottom: .4rem; }
.empty-state p{ max-width: 42ch; margin-inline: auto; }

/* ---------------- Responsive ---------------- */
@media (max-width: 900px){
  .navbar__nav{ display: none; }
  .navbar__burger{ display: grid; }
  .site-footer__inner{ grid-template-columns: 1fr 1fr; }
  .site-footer__inner > :first-child{ grid-column: 1 / -1; }
}
@media (max-width: 560px){
  .site-footer__inner{ grid-template-columns: 1fr; }
}