/* ==========================================================
   Birvona — site styles
   ========================================================== */

:root {
  /* Palette */
  --color-bg: #f7f5f0;
  --color-surface: #ffffff;
  --color-surface-alt: #efece4;
  --color-ink: #1b1f2a;
  --color-ink-soft: #4a5060;
  --color-ink-muted: #6b7080;
  --color-line: #e2ded3;
  --color-accent: #2f4ad0;
  --color-accent-ink: #22379e;
  --color-accent-soft: #e6eafb;
  --color-warm: #e8743b;
  --color-warm-soft: #fbe9df;
  --color-status: #b7651f;
  --color-status-bg: #fdf1e3;
  --color-focus: #2f4ad0;

  /* Type */
  --font-display: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Charter, "Bitstream Charter", Georgia, serif;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --text-sm: 0.875rem;
  --text-base: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1.05rem + 0.35vw, 1.3rem);
  --text-h3: clamp(1.35rem, 1.2rem + 0.6vw, 1.6rem);
  --text-h2: clamp(1.9rem, 1.5rem + 1.8vw, 2.9rem);
  --text-hero: clamp(2.5rem, 1.6rem + 4.4vw, 5rem);

  /* Space */
  --gutter: clamp(1rem, 0.6rem + 2vw, 2rem);
  --space-section: clamp(4.5rem, 3rem + 6vw, 8.5rem);
  --max-width: 72rem;

  /* Shape & motion */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.75rem;
  --shadow-soft: 0 1px 2px rgba(27, 31, 42, 0.04), 0 8px 24px -12px rgba(27, 31, 42, 0.12);
  --shadow-lift: 0 2px 4px rgba(27, 31, 42, 0.05), 0 24px 48px -20px rgba(27, 31, 42, 0.22);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---------- Base ---------- */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--color-ink);
}

p {
  margin: 0;
}

a {
  color: var(--color-accent);
  text-underline-offset: 0.2em;
}

:where(ul[role="list"]) {
  list-style: none;
  margin: 0;
  padding: 0;
}

svg {
  display: block;
}

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

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

.skip-link {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.6rem 1rem;
  background: var(--color-ink);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: none;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.eyebrow {
  margin-bottom: 1rem;
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 245, 240, 0.86);
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
  backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--duration-normal) ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--color-line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.25rem;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.wordmark-mark {
  width: 2rem;
  height: 2rem;
  color: var(--color-ink);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-list a {
  display: inline-block;
  padding: 0.5rem 0.9rem;
  border-radius: 999px;
  color: var(--color-ink-soft);
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  transition: color var(--duration-fast) ease, background-color var(--duration-fast) ease;
}

.nav-list a:hover {
  color: var(--color-ink);
  background: var(--color-surface-alt);
}

.nav-list .nav-cta {
  margin-left: 0.35rem;
  background: var(--color-ink);
  color: #fff;
}

.nav-list .nav-cta:hover {
  background: var(--color-accent-ink);
  color: #fff;
}

.nav-toggle {
  display: none;
}

@media (max-width: 40rem) {
  .nav-toggle {
    display: inline-grid;
    place-items: center;
    width: 2.75rem;
    height: 2.75rem;
    padding: 0;
    border: 1px solid var(--color-line);
    border-radius: 999px;
    background: var(--color-surface);
    color: var(--color-ink);
    cursor: pointer;
  }

  .nav-toggle-bar,
  .nav-toggle-bar::before,
  .nav-toggle-bar::after {
    display: block;
    width: 1.1rem;
    height: 2px;
    border-radius: 2px;
    background: currentColor;
    transition: transform var(--duration-normal) var(--ease-out), opacity var(--duration-fast) ease;
  }

  .nav-toggle-bar {
    position: relative;
  }

  .nav-toggle-bar::before,
  .nav-toggle-bar::after {
    content: "";
    position: absolute;
    left: 0;
  }

  .nav-toggle-bar::before { transform: translateY(-6px); }
  .nav-toggle-bar::after { transform: translateY(6px); }

  .nav-toggle[aria-expanded="true"] .nav-toggle-bar { background: transparent; }
  .nav-toggle[aria-expanded="true"] .nav-toggle-bar::before { background: var(--color-ink); transform: rotate(45deg); }
  .nav-toggle[aria-expanded="true"] .nav-toggle-bar::after { background: var(--color-ink); transform: rotate(-45deg); }

  /* Without JS the list stays visible; JS adds .js to <html> to enable collapsing. */
  .js .nav-list {
    position: absolute;
    top: calc(100% + 1px);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding: 0.75rem var(--gutter) 1.25rem;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-line);
    box-shadow: 0 16px 24px -16px rgba(27, 31, 42, 0.18);
  }

  .js .nav-list:not(.is-open) {
    display: none;
  }

  .js .nav-list a {
    display: block;
    padding: 0.8rem 1rem;
    font-size: 1rem;
  }

  .js .nav-list .nav-cta {
    margin: 0.35rem 0 0;
    text-align: center;
  }

  html:not(.js) .header-inner {
    flex-wrap: wrap;
    padding-block: 0.5rem;
  }

  html:not(.js) .nav-toggle {
    display: none;
  }
}

/* ---------- Buttons ---------- */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.75rem 1.4rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform var(--duration-fast) ease, background-color var(--duration-fast) ease,
    border-color var(--duration-fast) ease, box-shadow var(--duration-fast) ease;
}

.button:active {
  transform: translateY(1px);
}

.button-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 8px 20px -10px rgba(47, 74, 208, 0.7);
}

.button-primary:hover {
  background: var(--color-accent-ink);
}

.button-ghost {
  border-color: var(--color-line);
  background: var(--color-surface);
  color: var(--color-ink);
}

.button-ghost:hover {
  border-color: var(--color-ink-muted);
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  padding-block: clamp(3.5rem, 2rem + 6vw, 7.5rem) clamp(4rem, 2.5rem + 6vw, 8rem);
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(2.5rem, 1rem + 5vw, 5rem);
}

.hero h1 {
  max-width: 13ch;
  font-size: var(--text-hero);
  letter-spacing: -0.025em;
}

.lede {
  max-width: 36rem;
  margin-top: 1.5rem;
  font-size: var(--text-lg);
  color: var(--color-ink-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2.25rem;
}

.hero-visual {
  position: relative;
  aspect-ratio: 1 / 1;
  width: 100%;
  max-width: 26rem;
  justify-self: end;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 6% 4% 10% 8%;
  border-radius: 40% 46% 42% 48%;
  background:
    radial-gradient(circle at 30% 30%, var(--color-accent-soft), transparent 65%),
    radial-gradient(circle at 75% 70%, var(--color-warm-soft), transparent 60%);
}

.tile {
  position: absolute;
  display: grid;
  place-items: center;
  border-radius: 26%;
  box-shadow: var(--shadow-lift);
}

.tile-glyph {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.03em;
  color: #fff;
}

.tile-birvona {
  top: 10%;
  left: 6%;
  width: 56%;
  aspect-ratio: 1;
  background: linear-gradient(150deg, #3d58e0 0%, var(--color-accent-ink) 100%);
  transform: rotate(-6deg);
}

.tile-birvona .tile-glyph {
  font-size: clamp(4rem, 2rem + 6vw, 7rem);
}

.tile-xv {
  right: 4%;
  bottom: 14%;
  width: 44%;
  aspect-ratio: 1;
  background: linear-gradient(150deg, #f08a4f 0%, #d65f28 100%);
  transform: rotate(7deg);
}

.tile-xv .tile-glyph {
  font-size: clamp(2.4rem, 1.2rem + 3.6vw, 4rem);
}

.hero-note {
  position: absolute;
  left: 10%;
  bottom: 4%;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.95rem;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-ink-soft);
  white-space: nowrap;
}

.status-dot {
  flex: none;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--color-warm);
  box-shadow: 0 0 0 3px var(--color-warm-soft);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

@media (max-width: 52rem) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-visual {
    max-width: 20rem;
    justify-self: center;
  }
}

/* ---------- Sections ---------- */

.section {
  padding-block: var(--space-section);
}

.section-head h2 {
  font-size: var(--text-h2);
}

.section-intro {
  max-width: 34rem;
  margin-top: 1rem;
  color: var(--color-ink-soft);
}

/* ---------- Products ---------- */

.products {
  background: var(--color-surface);
  border-block: 1px solid var(--color-line);
}

.product-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1rem, 0.5rem + 1.5vw, 1.75rem);
  margin-top: clamp(2.5rem, 2rem + 2vw, 3.5rem);
}

.product-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  height: 100%;
  padding: clamp(1.5rem, 1rem + 2vw, 2.5rem);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-bg);
  overflow: hidden;
  transition: transform var(--duration-normal) var(--ease-out), box-shadow var(--duration-normal) var(--ease-out);
}

.product-card::after {
  content: "";
  position: absolute;
  top: -30%;
  right: -20%;
  width: 60%;
  aspect-ratio: 1;
  border-radius: 50%;
  opacity: 0.7;
  pointer-events: none;
}

.product-birvona::after {
  background: radial-gradient(circle, var(--color-accent-soft), transparent 70%);
}

.product-xv::after {
  background: radial-gradient(circle, var(--color-warm-soft), transparent 70%);
}

.product-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
}

.product-icon {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 4.5rem;
  height: 4.5rem;
  border-radius: 1.2rem;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: #fff;
  box-shadow: var(--shadow-soft);
}

.product-birvona .product-icon {
  background: linear-gradient(150deg, #3d58e0, var(--color-accent-ink));
}

.product-xv .product-icon {
  background: linear-gradient(150deg, #f08a4f, #d65f28);
  font-size: 1.6rem;
}

.product-body {
  position: relative;
  z-index: 1;
  margin-top: auto;
}

.product-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 1rem;
  margin-bottom: 0.6rem;
}

.product-meta h3 {
  font-size: var(--text-h3);
}

.product-body p {
  color: var(--color-ink-soft);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  background: var(--color-status-bg);
  color: var(--color-status);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

@media (max-width: 44rem) {
  .product-list {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ---------- About ---------- */

.about-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
  gap: clamp(1.5rem, 1rem + 4vw, 5rem);
  align-items: start;
}

.about-copy {
  display: grid;
  gap: 1.25rem;
  padding-top: 0.25rem;
  font-size: var(--text-lg);
  color: var(--color-ink-soft);
}

.about-copy p:first-child {
  color: var(--color-ink);
}

.about-copy strong {
  font-weight: 600;
  color: var(--color-ink);
}

@media (max-width: 52rem) {
  .about-inner {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ---------- Contact ---------- */

.contact {
  padding-top: 0;
}

.contact-panel {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  padding: clamp(2rem, 1.25rem + 4vw, 4.5rem);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 100% 0%, rgba(61, 88, 224, 0.45), transparent 50%),
    var(--color-ink);
  color: #d5d8e2;
}

.contact-panel h2 {
  max-width: 18ch;
  font-size: var(--text-h2);
  color: #fff;
}

.contact-panel p {
  margin-top: 1rem;
}

.eyebrow-light {
  margin-top: 0;
  color: #a9b6ff;
}

.contact-email {
  max-width: 100%;
  padding: 0.9rem 1.5rem;
  border-radius: 999px;
  background: #fff;
  color: var(--color-ink);
  font-size: var(--text-lg);
  font-weight: 600;
  text-decoration: none;
  overflow-wrap: anywhere;
  transition: background-color var(--duration-fast) ease, transform var(--duration-fast) ease;
}

.contact-email:hover {
  background: var(--color-accent-soft);
}

.contact-email:focus-visible {
  outline-color: #fff;
}

/* ---------- Footer ---------- */

.site-footer {
  padding-block: 2rem 2.5rem;
  border-top: 1px solid var(--color-line);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem 2rem;
}

.site-footer a {
  color: var(--color-ink-soft);
}

.site-footer a:hover {
  color: var(--color-accent);
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .product-card:hover {
    transform: none;
  }
}

/* ---------- 404 ---------- */

.page-title {
  font-size: var(--text-h2);
}