/* ==========================================================================
   Base — reset, typography, layout primitives, shared components
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  /* Keep the sticky bar from covering the heading an anchor jumps to. */
  scroll-padding-top: 5.5rem;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  /* Parchment tooth: two soft radial washes rather than a scanned paper
     texture. Same warmth as the flyer stock, no payload, no licensing. */
  background-image:
    radial-gradient(
      ellipse 80% 55% at 15% 0%,
      color-mix(in srgb, var(--cream) 60%, transparent),
      transparent 70%
    ),
    radial-gradient(
      ellipse 70% 50% at 88% 100%,
      color-mix(in srgb, var(--parchment-edge) 40%, transparent),
      transparent 70%
    );
  background-attachment: fixed;
}

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

h1,
h2,
h3,
h4 {
  font-family: var(--font-head);
  line-height: var(--lh-head);
  color: var(--heading);
  margin: 0 0 var(--sp-4);
  text-wrap: balance;
}

p {
  margin: 0 0 var(--sp-4);
  text-wrap: pretty;
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--link);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--accent-ink);
}

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

::selection {
  background: color-mix(in srgb, var(--gold) 45%, transparent);
  color: var(--ink);
}

/* --- Layout primitives ------------------------------------------------------ */

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-6);
}

/* Also usable on its own inside a .container, so it centres itself rather
   than relying on .container's auto margins. */
.container--narrow {
  max-width: var(--container-narrow);
  margin-inline: auto;
}

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

.section--alt {
  background: color-mix(in srgb, var(--bg-alt) 72%, transparent);
  border-block: 1px solid var(--rule);
}

/* The night-time register: used for the running order and the closing CTA so
   the page opens and closes in the same navy the invitation does. */
.section--night {
  background: var(--navy);
  color: #eee6d3;
  border-block: 1px solid color-mix(in srgb, var(--gold) 40%, transparent);
}

.section--night h2,
.section--night h3,
.section--night h4 {
  color: #f4e9cd;
}

.section--night .lede,
.section--night .prose {
  color: #d6cdb8;
}

.section--night .eyebrow {
  color: var(--gold-bright);
}

.section--night a:not(.btn) {
  color: var(--gold-bright);
}

.measure {
  max-width: var(--measure);
}

.center {
  text-align: center;
  margin-inline: auto;
}

/* Centered block, left-aligned text. Centered body copy past a few lines is
   hard to read — the eye loses the start of the next line. */
.prose {
  max-width: var(--measure);
  margin-inline: auto;
  text-align: left;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: 0;
  left: var(--sp-4);
  transform: translateY(-120%);
  z-index: 100;
  background: var(--navy-deep);
  color: var(--gold-bright);
  padding: var(--sp-3) var(--sp-6);
  border-radius: 0 0 var(--radius) var(--radius);
  text-decoration: none;
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
  color: var(--gold-bright);
}

/* --- Section headings -------------------------------------------------------- */

.eyebrow {
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent-ink);
  margin: 0 0 var(--sp-4);
}

.section-title {
  font-size: var(--fs-2xl);
  font-weight: 600;
  margin-bottom: var(--sp-6);
}

.lede {
  font-size: var(--fs-lg);
  color: var(--text-soft);
}

/* --- Thistle rule: the flyer's gold divider, drawn in CSS ------------------- */

.thistle-rule {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-3);
  margin: var(--sp-8) auto;
  color: var(--accent);
}

.thistle-rule::before,
.thistle-rule::after {
  content: "";
  flex: 1 1 auto;
  max-width: 7rem;
  height: 1px;
  background: linear-gradient(90deg, transparent, currentcolor);
}

.thistle-rule::after {
  background: linear-gradient(90deg, currentcolor, transparent);
}

.thistle-rule svg {
  width: 2.1rem;
  height: 2.1rem;
  flex: 0 0 auto;
  fill: currentcolor;
}

/* --- Tartan band ------------------------------------------------------------- */
/* A single sett built from repeating gradients. Kept to thin bands and the
   hero corners; never a field behind body text. */

.tartan {
  --sett: 56px;
  background-color: var(--tartan-a);
  background-image:
    repeating-linear-gradient(
      90deg,
      transparent 0 calc(var(--sett) * 0.36),
      var(--tartan-b) calc(var(--sett) * 0.36) calc(var(--sett) * 0.62),
      transparent calc(var(--sett) * 0.62) var(--sett)
    ),
    repeating-linear-gradient(
      90deg,
      transparent 0 calc(var(--sett) * 0.7),
      var(--tartan-c) calc(var(--sett) * 0.7) calc(var(--sett) * 0.9),
      transparent calc(var(--sett) * 0.9) var(--sett)
    ),
    repeating-linear-gradient(
      90deg,
      var(--tartan-d) 0 2px,
      transparent 2px calc(var(--sett) * 0.5),
      var(--tartan-line) calc(var(--sett) * 0.5) calc(var(--sett) * 0.5 + 1px),
      transparent calc(var(--sett) * 0.5 + 1px) var(--sett)
    ),
    repeating-linear-gradient(
      0deg,
      transparent 0 calc(var(--sett) * 0.36),
      color-mix(in srgb, var(--tartan-b) 55%, transparent) calc(var(--sett) * 0.36)
        calc(var(--sett) * 0.62),
      transparent calc(var(--sett) * 0.62) var(--sett)
    ),
    repeating-linear-gradient(
      0deg,
      transparent 0 calc(var(--sett) * 0.7),
      color-mix(in srgb, var(--tartan-c) 55%, transparent) calc(var(--sett) * 0.7)
        calc(var(--sett) * 0.9),
      transparent calc(var(--sett) * 0.9) var(--sett)
    ),
    repeating-linear-gradient(
      0deg,
      color-mix(in srgb, var(--tartan-d) 70%, transparent) 0 2px,
      transparent 2px calc(var(--sett) * 0.5),
      color-mix(in srgb, var(--tartan-line) 70%, transparent) calc(var(--sett) * 0.5)
        calc(var(--sett) * 0.5 + 1px),
      transparent calc(var(--sett) * 0.5 + 1px) var(--sett)
    );
}

/* A finer sett than the hero corners: at 10px tall the full-size weave reads
   as stripes rather than tartan. */
.tartan-band {
  --sett: 26px;
  height: 10px;
  border-block: 1px solid color-mix(in srgb, var(--gold) 55%, transparent);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  font-family: var(--font-body);
  font-size: var(--fs-lg);
  font-weight: 700;
  line-height: 1.2;
  padding: var(--sp-4) var(--sp-8);
  border-radius: var(--radius);
  border: 2px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition:
    transform var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease),
    background-color var(--dur) var(--ease),
    color var(--dur) var(--ease);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn:active {
  transform: translateY(0);
}

/* Gold on navy is the invitation's own call to action. */
.btn--primary {
  background: var(--gold);
  color: var(--navy-deep);
  box-shadow: var(--shadow-sm);
}

.btn--primary:hover {
  background: var(--gold-bright);
  color: var(--navy-deep);
}

.btn--secondary {
  background: transparent;
  color: var(--heading);
  border-color: var(--rule-strong);
}

.btn--secondary:hover {
  background: color-mix(in srgb, var(--navy) 8%, transparent);
  color: var(--heading);
  border-color: var(--accent);
}

/* For use on the navy ground, where --heading is already near-white. */
.btn--ghost {
  background: transparent;
  color: #f4e9cd;
  border-color: color-mix(in srgb, var(--gold) 55%, transparent);
}

.btn--ghost:hover {
  background: color-mix(in srgb, var(--gold) 16%, transparent);
  color: #f4e9cd;
  border-color: var(--gold-bright);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-4);
}

.btn-row--center {
  justify-content: center;
}

.btn[aria-disabled="true"],
.btn:disabled {
  pointer-events: none;
  cursor: not-allowed;
  background: var(--parchment-edge);
  border-color: var(--parchment-edge);
  color: var(--text-muted);
  box-shadow: none;
  transform: none;
}

/* --- Cards -------------------------------------------------------------------- */

.card {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  padding: var(--sp-6);
  box-shadow: var(--shadow-sm);
}

/* --- Utilities ----------------------------------------------------------------- */

.grid {
  display: grid;
  gap: var(--sp-6);
}

.stack > * + * {
  margin-top: var(--sp-4);
}

/* Verse from Burns. Set in Garamond italic — an 18th-century face for an
   18th-century voice — and never justified. */
.verse {
  font-family: var(--font-head);
  font-style: italic;
  font-size: var(--fs-lg);
  line-height: 1.5;
  color: var(--text-soft);
  margin: 0;
}

.verse p {
  margin-bottom: var(--sp-3);
}

.verse cite {
  display: block;
  margin-top: var(--sp-3);
  font-family: var(--font-body);
  font-style: normal;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-ink);
}