/* ============================================================
   ONN — UI implementation of design/style_guide.md
   ============================================================ */

:root {
  --bg: #0A0A0A;
  --surface: #111111;
  --text: #EEEEEE;
  --muted: #AAAAAA;
  --accent: #CC0000;
  --accent-dark: #990000;
  --heading: #FFFFFF;
  --border: #222222;

  --font-body: "Inter", system-ui, Arial, sans-serif;
  --font-head: "Oswald", Impact, "Arial Black", sans-serif;
  --font-mono: "Courier New", monospace;

  --content-max: 860px;
  --pad-block: 2.5rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  background: var(--bg);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.1rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover,
a:focus-visible {
  text-decoration: underline;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  color: var(--heading);
  letter-spacing: 0.04em;
  line-height: 1.15;
  margin: 0 0 1rem;
}

h1 { font-size: clamp(2.6rem, 5vw, 3.5rem); text-transform: uppercase; }
h2 { font-size: clamp(1.6rem, 3vw, 2.1rem); text-transform: uppercase; }
h3 { font-size: 1.4rem; text-transform: uppercase; }

p { margin: 0 0 1.25rem; }

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

::selection {
  background: var(--accent);
  color: var(--heading);
}

/* ===== Header ============================================== */

.site-header {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.site-header__inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.site-header__brand {
  display: flex;
  flex-direction: column;
  color: var(--heading);
  text-decoration: none;
  border-left: 4px solid var(--accent);
  padding-left: 0.75rem;
}
.site-header__brand:hover { text-decoration: none; }
.site-header__logo {
  display: block;
  width: 56px;
  height: 56px;
  object-fit: contain;
  filter: invert(1);
}
.site-header__tagline {
  color: var(--muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  margin-top: 0.4rem;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}
.site-nav a {
  color: var(--text);
  font-family: var(--font-head);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 0.4rem 0.1rem;
  border-bottom: 2px solid transparent;
}
.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--accent);
  text-decoration: none;
  border-bottom-color: var(--accent);
}
.site-nav__cta {
  background: var(--accent);
  color: var(--heading) !important;
  padding: 0.5rem 0.9rem !important;
  border: 0 !important;
}
.site-nav__cta:hover {
  background: var(--accent-dark);
  border-bottom-color: transparent !important;
}

/* ===== Main / Layout ====================================== */

.site-main {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--pad-block) 1.5rem 4rem;
}

.page-header {
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1.5rem;
}
.page-header__eyebrow {
  color: var(--accent);
  font-family: var(--font-head);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.9rem;
  margin: 0 0 0.5rem;
}
.page-header__title {
  margin: 0;
}
.page-header__lede {
  color: var(--muted);
  margin: 1rem 0 0;
  font-size: 1.05rem;
}

.section {
  margin: 3rem 0;
}
.section__header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
  border-top: 2px solid var(--accent);
  padding-top: 1rem;
}
.section__title {
  margin: 0;
}
.section__more {
  font-family: var(--font-head);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.empty {
  color: var(--muted);
  font-style: italic;
}

/* ===== Hero =============================================== */

.hero {
  position: relative;
  margin: 0 0 3rem;
  border: 1px solid var(--border);
  overflow: hidden;
  isolation: isolate;
}
.hero__image {
  width: 100%;
  height: clamp(320px, 55vh, 560px);
  object-fit: cover;
  filter: grayscale(0.35) contrast(1.05) brightness(0.55);
}
.hero__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 2rem;
  background: linear-gradient(
    180deg,
    rgba(10, 10, 10, 0.0) 0%,
    rgba(10, 10, 10, 0.35) 55%,
    rgba(10, 10, 10, 0.92) 100%
  );
}
.hero__eyebrow {
  color: var(--accent);
  font-family: var(--font-head);
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.85rem;
  margin: 0 0 0.5rem;
}
.hero__title {
  margin: 0;
  font-size: clamp(3rem, 7vw, 5rem);
  text-transform: uppercase;
}
.hero__tagline {
  color: var(--text);
  font-family: var(--font-head);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  margin: 0.5rem 0 1.5rem;
}

/* ===== Slideshow ========================================== */

.slideshow {
  position: relative;
  border: 1px solid var(--border);
  margin-bottom: 3rem;
  overflow: hidden;
  background: #000;
}
.video-feature__player {
  display: block;
  width: 100%;
  height: auto;
  background: #000;
  border: 1px solid var(--border);
}
.slideshow__viewport {
  position: relative;
  aspect-ratio: 16 / 9;
}
.slideshow__slide {
  position: absolute;
  inset: 0;
  margin: 0;
  opacity: 0;
  transition: opacity 700ms ease;
  pointer-events: none;
}
.slideshow__slide.is-active {
  opacity: 1;
  pointer-events: auto;
}
.slideshow__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.2) contrast(1.05);
}
.slideshow__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  min-width: 44px;
  min-height: 44px;
  padding: 0 0.9rem;
  background: rgba(10, 10, 10, 0.72);
  color: var(--heading);
  border: 1px solid var(--border);
  font-family: var(--font-head);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  transition: background 150ms ease, border-color 150ms ease, color 150ms ease;
}
.slideshow__nav:hover,
.slideshow__nav:focus-visible {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--heading);
  outline: none;
}
.slideshow__nav--prev { left: 0.75rem; }
.slideshow__nav--next { right: 0.75rem; }
.slideshow__dots {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.85rem;
  display: flex;
  justify-content: center;
  gap: 0.4rem;
  padding: 0 1rem;
  flex-wrap: wrap;
}
.slideshow__dot {
  width: 14px;
  height: 6px;
  padding: 0;
  background: rgba(238, 238, 238, 0.35);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: background 150ms ease, border-color 150ms ease;
}
.slideshow__dot:hover,
.slideshow__dot:focus-visible {
  background: rgba(238, 238, 238, 0.7);
  outline: none;
}
.slideshow__dot.is-active {
  background: var(--accent);
  border-color: var(--accent);
}

@media (prefers-reduced-motion: reduce) {
  .slideshow__slide {
    transition: none;
  }
}

@media (max-width: 600px) {
  .slideshow__nav {
    font-size: 1.1rem;
    padding: 0 0.6rem;
  }
}

/* ===== Post Cards ========================================= */

.post-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 1.5rem;
  transition: transform 120ms ease, border-color 120ms ease;
}
.post-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.post-card__title {
  margin: 0 0 0.5rem;
  font-size: 1.5rem;
}
.post-card__title a {
  color: var(--heading);
}
.post-card__title a:hover {
  color: var(--accent);
  text-decoration: none;
}
.post-card__meta {
  color: var(--muted);
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  margin: 0 0 0.75rem;
  text-transform: uppercase;
}
.post-card__dot { margin: 0 0.4rem; }
.post-card__category { color: var(--accent); }
.post-card__excerpt {
  color: var(--text);
  margin: 0 0 1rem;
}
.post-card__more {
  font-family: var(--font-head);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.9rem;
}

/* ===== Article ============================================ */

.article {
  margin: 0 auto;
}
.article__header {
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1.5rem;
}
.article__eyebrow {
  font-family: var(--font-head);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.85rem;
  margin: 0 0 1rem;
}
.article__title {
  margin: 0;
  font-size: clamp(2.4rem, 5vw, 3.4rem);
}
.article__meta {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.9rem;
  margin: 1rem 0 0;
}
.article__dot { margin: 0 0.5rem; }

.article__body h2 {
  border-top: 2px solid var(--accent);
  padding-top: 1rem;
  margin-top: 2.5rem;
}
.article__body h3 {
  margin-top: 2rem;
}

.prose {
  color: var(--text);
}
.prose a { color: var(--accent); font-weight: 600; }
.prose a:hover { text-decoration: underline; }
.prose blockquote {
  border-left: 3px solid var(--accent);
  margin: 1.5rem 0;
  padding: 0.25rem 1.25rem;
  color: var(--muted);
  font-style: italic;
}
.prose code {
  font-family: var(--font-mono);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.1rem 0.35rem;
  font-size: 0.95em;
}
.prose pre {
  font-family: var(--font-mono);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 1rem;
  overflow-x: auto;
}
.prose ul, .prose ol { padding-left: 1.5rem; }
.prose li { margin: 0.35rem 0; }
.prose img {
  border: 1px solid var(--border);
  margin: 1.5rem 0;
}

/* ===== Gallery ============================================ */

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}
.gallery__item {
  margin: 0;
  border: 1px solid var(--border);
  overflow: hidden;
  background: var(--surface);
}
.gallery__item img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: grayscale(0.2) contrast(1.05);
  transition: filter 200ms ease, transform 200ms ease;
}
.gallery__item:hover img {
  filter: none;
  transform: scale(1.02);
}

/* ===== Buttons ============================================ */

.btn {
  display: inline-block;
  font-family: var(--font-head);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.95rem;
  padding: 0.75rem 1.25rem;
  border: 0;
  cursor: pointer;
  text-decoration: none;
}
.btn--primary {
  background: var(--accent);
  color: var(--heading);
}
.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--accent-dark);
  text-decoration: none;
}

/* ===== Forms ============================================== */

.form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  max-width: 640px;
}
.form__field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.form__field label {
  font-family: var(--font-head);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.85rem;
  color: var(--muted);
}
.form__input,
.form__textarea {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 0.75rem 0.9rem;
  font-family: var(--font-body);
  font-size: 1rem;
  border-radius: 0;
  width: 100%;
}
.form__input:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}
.form__textarea {
  resize: vertical;
  min-height: 8rem;
  font-family: var(--font-body);
}
.form__error {
  color: var(--accent);
  font-size: 0.9rem;
  margin: 0;
}

/* ===== Flash messages ===================================== */

.flash-stack {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}
.flash {
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 0.95rem;
}
.flash--error {
  border-color: var(--accent);
  color: var(--accent);
}
.flash--success {
  border-color: #2a8f2a;
  color: #c8efc8;
}

/* ===== Footer ============================================= */

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg);
  margin-top: 4rem;
}
.site-footer__inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1.5rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.9rem;
  flex-wrap: wrap;
}
.site-footer nav {
  display: flex;
  gap: 1rem;
}
.site-footer a {
  color: var(--muted);
}
.site-footer a:hover {
  color: var(--accent);
}

/* ===== Responsive ========================================= */

@media (max-width: 720px) {
  .site-header__inner {
    flex-direction: column;
    align-items: flex-start;
  }
  .site-nav {
    width: 100%;
    gap: 0.75rem 1rem;
  }
  .hero__overlay {
    padding: 1.25rem;
  }
  .section__header {
    flex-direction: column;
    align-items: flex-start;
  }
}