/* ============================================================
   Nexus Digital Theme — main.css
   Design tokens mirror the Next.js frontend exactly.
   ============================================================ */

/* ── Tokens ───────────────────────────────────────────────── */
:root {
  --bg-main:        #06080d;
  --bg-surface:     #0e131b;
  --bg-elevated:    #141b25;
  --bg-card:        rgba(255,255,255,0.035);
  --text-primary:   #f8fafc;
  --text-muted:     #a8b2c3;
  --text-soft:      #778295;
  --border-soft:    rgba(255,255,255,0.10);
  --border-strong:  rgba(255,255,255,0.16);
  --accent:         #dbe6ff;
  --accent-strong:  #9db5ff;
  --blue:           #3b6ef0;
  --blue-hover:     #2f5fd8;
  --radius-sm:      12px;
  --radius-md:      18px;
  --radius-lg:      24px;
  --radius-xl:      32px;
  --font-body:      'Manrope', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --header-h:       64px;
}

/* ── Reset ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
img, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; }
a { color: inherit; text-decoration: none; }
ol, ul { list-style: none; }

/* ── Base ─────────────────────────────────────────────────── */
body {
  font-family: var(--font-body);
  background:
    radial-gradient(ellipse 1200px 560px at 50% -6%, rgba(155,182,255,0.10), transparent 58%),
    radial-gradient(ellipse 700px  500px at 82% 28%, rgba(110,145,255,0.04), transparent 68%),
    linear-gradient(180deg, #070a10 0%, #0b1120 42%, #070a10 100%);
  background-attachment: fixed;
  color: var(--text-muted);
  line-height: 1.72;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-body);
  color: var(--text-primary);
  letter-spacing: -0.035em;
  line-height: 1.08;
  text-wrap: balance;
  font-weight: 700;
}

p { color: var(--text-muted); text-wrap: pretty; }

*::selection { background: rgba(219,230,255,0.20); color: #fff; }

/* ── Container ────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: 1.5rem;
}
@media (min-width: 768px)  { .container { padding-inline: 2rem; } }
@media (min-width: 1024px) { .container { padding-inline: 2.5rem; } }

.container--narrow { max-width: 760px; }

/* ── Site wrapper (push footer down) ─────────────────────── */
.site-wrapper {
  min-height: calc(100vh - var(--header-h));
  padding-top: var(--header-h);
}

/* ── Header ───────────────────────────────────────────────── */
.site-header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 50;
  height: var(--header-h);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  background: rgba(6,8,13,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.site-header__inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  height: 100%;
}

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}
.site-logo__mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--blue);
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
}
.site-logo__text {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}
.site-logo img { height: 28px; width: auto; }

/* Nav */
.site-nav { margin-inline-start: auto; }
.site-nav__list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.site-nav__list li a {
  display: block;
  padding: 0.4rem 0.75rem;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-soft);
  border-radius: var(--radius-sm);
  transition: color 0.15s, background 0.15s;
}
.site-nav__list li a:hover,
.site-nav__list li.current-menu-item > a {
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
}

/* Header actions */
.site-header__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-inline-start: 1rem;
}

.cart-link,
.account-link {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  color: var(--text-soft);
  transition: color 0.15s, background 0.15s;
}
.cart-link:hover, .account-link:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
}

.cart-count {
  position: absolute;
  top: 4px;
  right: 4px;
  display: none;
  min-width: 16px;
  height: 16px;
  padding-inline: 3px;
  border-radius: 999px;
  background: var(--blue);
  color: #fff;
  font-size: 9px;
  font-weight: 700;
  line-height: 16px;
  text-align: center;
}
.cart-count.is-active { display: block; }

/* Mobile toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--text-soft);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

@media (max-width: 767px) {
  .nav-toggle { display: flex; }
  .site-nav {
    position: fixed;
    inset: var(--header-h) 0 0 0;
    background: rgba(6,8,13,0.97);
    backdrop-filter: blur(20px);
    padding: 2rem 1.5rem;
    transform: translateX(100%);
    transition: transform 0.28s cubic-bezier(0.22,1,0.36,1);
  }
  .site-nav.is-open { transform: translateX(0); }
  .site-nav__list { flex-direction: column; align-items: flex-start; gap: 0.25rem; }
  .site-nav__list li a { font-size: 18px; padding: 0.6rem 0.75rem; }
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.625rem 1.25rem;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s, background 0.15s, box-shadow 0.15s;
  border: none;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: #fff;
  color: #0a0f1c;
}
.btn--primary:hover { background: #e8edf8; }

.btn--secondary {
  background: rgba(255,255,255,0.04);
  color: var(--text-primary);
  border: 1px solid var(--border-soft);
}
.btn--secondary:hover {
  background: rgba(255,255,255,0.07);
  border-color: var(--border-strong);
}

.btn--blue {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 0 0 0 rgba(59,110,240,0);
}
.btn--blue:hover {
  background: var(--blue-hover);
  box-shadow: 0 8px 24px rgba(59,110,240,0.35);
}

.btn--lg { padding: 0.75rem 1.75rem; font-size: 15px; }
.btn--sm { padding: 0.4rem 0.875rem; font-size: 12px; }

/* ── Cards ────────────────────────────────────────────────── */
.card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-soft);
  background: var(--bg-card);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
}
.card:hover {
  border-color: var(--border-strong);
  background: rgba(255,255,255,0.05);
  transform: translateY(-2px);
}

/* ── Typography helpers ───────────────────────────────────── */
.section-kicker {
  display: block;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--text-soft);
}

.page-header { margin-bottom: 3rem; }
.page-title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  margin-top: 0.5rem;
}
.page-description {
  margin-top: 0.75rem;
  max-width: 48ch;
  font-size: 15px;
  color: var(--text-muted);
}

/* ── Prose (entry-content) ────────────────────────────────── */
.prose {
  max-width: 65ch;
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.8;
}
.prose h1, .prose h2, .prose h3, .prose h4 { margin-top: 2em; margin-bottom: 0.5em; }
.prose p  { margin-bottom: 1.25em; }
.prose a  { color: var(--accent-strong); text-decoration: underline; text-underline-offset: 3px; }
.prose a:hover { color: #fff; }
.prose ul, .prose ol { margin: 1em 0; padding-inline-start: 1.5em; }
.prose li { margin-bottom: 0.4em; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose blockquote {
  border-inline-start: 2px solid var(--border-strong);
  padding: 0.5em 1em;
  margin: 1.5em 0;
  color: var(--text-soft);
  font-style: italic;
}
.prose code {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border-soft);
  border-radius: 4px;
  padding: 0.1em 0.4em;
  font-size: 0.875em;
  color: var(--accent-strong);
}
.prose pre {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 1.25em;
  overflow-x: auto;
  margin: 1.5em 0;
}
.prose pre code { background: none; border: none; padding: 0; color: var(--text-muted); font-size: 13px; }
.prose img { border-radius: var(--radius-md); margin: 2em 0; }
.prose hr { border: none; border-top: 1px solid var(--border-soft); margin: 2.5em 0; }
.prose table { width: 100%; border-collapse: collapse; margin: 1.5em 0; }
.prose th, .prose td { padding: 0.75em 1em; border: 1px solid var(--border-soft); text-align: left; font-size: 14px; }
.prose th { background: rgba(255,255,255,0.03); color: var(--text-primary); font-weight: 600; }

/* ── Posts grid ───────────────────────────────────────────── */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.post-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-soft);
  background: var(--bg-card);
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s;
}
.post-card:hover { border-color: var(--border-strong); transform: translateY(-2px); }

.post-card__image-link { display: block; overflow: hidden; aspect-ratio: 16/10; }
.post-card__image { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.post-card:hover .post-card__image { transform: scale(1.03); }

.post-card__body { padding: 1.25rem 1.5rem 1.5rem; }
.post-card__meta {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-soft);
  margin-bottom: 0.5rem;
}
.post-card__title { font-size: 1.125rem; line-height: 1.2; margin-bottom: 0.5rem; }
.post-card__title a:hover { color: var(--accent); }
.post-card__excerpt { font-size: 14px; line-height: 1.65; color: var(--text-soft); }

/* ── Single post ──────────────────────────────────────────── */
.single-post { padding-block: 4rem; }
.single-post__header { margin-bottom: 2.5rem; }
.single-post__title { font-size: clamp(2rem, 5vw, 3rem); margin-block: 0.75rem; }
.single-post__meta { font-size: 13px; color: var(--text-soft); }
.single-post__meta-sep { margin-inline: 0.5rem; }
.single-post__thumbnail {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 2.5rem;
}
.single-post__thumbnail img { width: 100%; height: auto; }
.single-post__footer { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--border-soft); }

.post-tags a {
  display: inline-block;
  margin: 0.25rem;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--border-soft);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-soft);
  transition: border-color 0.15s, color 0.15s;
}
.post-tags a:hover { border-color: var(--border-strong); color: var(--text-primary); }

/* post navigation */
.post-navigation { margin-top: 3rem; display: flex; gap: 1rem; }
.nav-previous, .nav-next { flex: 1; }
.nav-next { text-align: right; }
.nav-label { display: block; font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.18em; color: var(--text-soft); margin-bottom: 0.25rem; }
.nav-title { font-size: 15px; font-weight: 600; color: var(--text-primary); }

/* ── Breadcrumbs ──────────────────────────────────────────── */
.breadcrumbs { margin-bottom: 2rem; }
.breadcrumbs__list { display: flex; flex-wrap: wrap; align-items: center; gap: 0.25rem; }
.breadcrumbs__item { font-size: 12px; color: var(--text-soft); }
.breadcrumbs__item a:hover { color: var(--text-primary); }
.breadcrumb__sep { margin-inline: 0.25rem; color: var(--border-strong); }

/* ── Forms (shared) ───────────────────────────────────────── */
.field,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="tel"],
input[type="url"],
input[type="search"],
textarea,
select {
  width: 100%;
  padding: 0.7rem 1rem;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.03);
  color: var(--text-primary);
  font-size: 14px;
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
  -webkit-appearance: none;
}
input:focus, textarea:focus, select:focus {
  border-color: rgba(59,110,240,0.55);
  box-shadow: 0 0 0 3px rgba(59,110,240,0.12);
}
input::placeholder, textarea::placeholder { color: var(--text-soft); }
select { cursor: pointer; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23778295' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 0.875rem center; padding-right: 2.5rem; }
label { display: block; margin-bottom: 0.375rem; font-size: 13px; font-weight: 600; color: var(--text-primary); }

/* ── Error / 404 ──────────────────────────────────────────── */
.error-page {
  text-align: center;
  padding-block: 6rem;
}
.error-page__title {
  font-size: clamp(2rem, 6vw, 4rem);
  margin-block: 1rem;
}
.error-page__body {
  max-width: 42ch;
  margin-inline: auto;
  margin-bottom: 2.5rem;
  color: var(--text-soft);
}
.error-page__actions { display: flex; gap: 0.75rem; justify-content: center; }

/* ── Page navigation ──────────────────────────────────────── */
.posts-navigation,
.post-navigation {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-soft);
}
.nav-links { display: flex; justify-content: space-between; gap: 1rem; }
.nav-links a {
  padding: 0.5rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--border-soft);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-soft);
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.nav-links a:hover { border-color: var(--border-strong); color: var(--text-primary); background: rgba(255,255,255,0.04); }

/* ── Footer ───────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-block: 4rem 2rem;
  margin-top: 6rem;
}

.site-footer__top {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}
@media (min-width: 640px) { .site-footer__top { grid-template-columns: 1.5fr 1fr 1fr; } }

.site-footer__tagline {
  margin-top: 1rem;
  font-size: 13px;
  color: var(--text-soft);
  max-width: 26ch;
}

.site-footer__nav-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--text-soft);
  margin-bottom: 1rem;
}
.site-footer__nav-list li + li { margin-top: 0.5rem; }
.site-footer__nav-list a { font-size: 14px; color: var(--text-soft); transition: color 0.15s; }
.site-footer__nav-list a:hover { color: var(--text-primary); }

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.05);
}
.site-footer__copy { font-size: 13px; color: var(--text-soft); }
.site-footer__legal { display: flex; gap: 1.25rem; }
.site-footer__legal a { font-size: 13px; color: var(--text-soft); transition: color 0.15s; }
.site-footer__legal a:hover { color: var(--text-primary); }

/* ── Scrollbar ────────────────────────────────────────────── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-main); }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.10); border-radius: 999px; border: 2px solid var(--bg-main); }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.18); }

/* ── Responsive utilities ─────────────────────────────────── */
@media (max-width: 767px) {
  .site-main { padding-block: 2.5rem; }
  .posts-grid { grid-template-columns: 1fr; }
}
@media (min-width: 768px) {
  .site-main { padding-block: 4rem; }
}