/* ============================================================================
   EON PEPTIDES — Components (reusable UI)
   ============================================================================ */

/* ---- Scroll progress bar ----------------------------------------------- */
#scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px; width: 100%;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  z-index: var(--z-progress);
  will-change: transform;
}

/* ---- Numbered section index (desktop) ---------------------------------- */
.section-index {
  position: fixed;
  right: clamp(18px, 2vw, 34px);
  top: 50%;
  transform: translateY(-50%);
  z-index: var(--z-rail);
  display: none;
  flex-direction: column;
  gap: 14px;
}
@media (min-width: 1520px) { .section-index { display: flex; } }
.section-index a {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  opacity: 0.55;
  transition: opacity var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.section-index a .si-tick {
  width: 14px; height: 1px; background: currentColor;
  transition: width var(--dur-fast) var(--ease-out);
}
.section-index a .si-label {
  opacity: 0; transform: translateX(4px);
  transition: opacity var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.section-index a:hover { opacity: 1; color: var(--ink-3); }
.section-index a:hover .si-label { opacity: 1; transform: none; }
.section-index a.is-active { opacity: 1; color: var(--accent-press); }
.section-index a.is-active .si-tick { width: 26px; background: var(--accent); }
.section-index a.is-active .si-label { opacity: 1; transform: none; }

/* ---- Custom cursor ----------------------------------------------------- */
.cursor-dot, .cursor-ring {
  position: fixed; top: 0; left: 0;
  pointer-events: none;
  z-index: var(--z-cursor);
  opacity: 0;
  transition: opacity var(--dur-fast) var(--ease-out);
  margin-left: -3px; margin-top: -3px;
}
.cursor-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--ink); }
.cursor-ring {
  width: 30px; height: 30px; border-radius: 50%;
  border: 1px solid rgba(58,93,122,0.6);
  margin-left: -15px; margin-top: -15px;
  transition: opacity var(--dur-fast) var(--ease-out), width var(--dur-fast) var(--ease-out), height var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.has-custom-cursor.cursor-grow .cursor-ring {
  width: 46px; height: 46px; margin-left: -23px; margin-top: -23px;
  border-color: rgba(58,93,122,0.9);
}
@media (hover: none), (pointer: coarse) { .cursor-dot, .cursor-ring { display: none; } }

/* ---- Buttons ----------------------------------------------------------- */
.btn {
  position: relative;
  display: inline-flex; align-items: center; justify-content: center; gap: 0.55em;
  padding: 0.85em 1.5em;
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.01em;
  line-height: 1;
  border: 1px solid transparent;
  transition: background var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
  will-change: transform;
}
.btn__label {
  position: relative; display: inline-block; overflow: hidden;
  vertical-align: bottom;
}
.btn__label > span {
  display: block;
  transition: transform var(--dur-fast) var(--ease-out-soft);
}
.btn__label > span[data-roll] {
  position: absolute; left: 0; top: 0;
  transform: translateY(110%);
}
.btn:has(.btn__label > span[data-roll]):hover .btn__label > span:first-child { transform: translateY(-110%); }
.btn:hover .btn__label > span[data-roll] { transform: translateY(0); }

.btn--primary {
  background: var(--accent); color: #fff; /* slate accent: white text = 6.9:1 (AA) */
  box-shadow: var(--shadow-1);
}
.btn--primary:hover { background: var(--accent-press); box-shadow: var(--shadow-2); }

/* ---- Press states (tactile confirmation — the only feedback on touch) --- */
.btn:active { transform: translateY(1px) scale(0.99); }
.btn--ghost:active { background: var(--surface); }
.seg__btn:active { opacity: 0.78; }
.nav__link:active, .nav__icon-btn:active, .accordion__trigger:active,
.mol__res-btn:active, .spec-row__head:active, .verifier__hint button:active { opacity: 0.7; }
@media (prefers-reduced-motion: reduce) { .btn:active { transform: none; } }

/* ---- Static buttons — no hover/press motion or fill change -------------- */
.btn--static:hover, .btn--static:active { transform: none; box-shadow: var(--shadow-1); }
.btn--static.btn--primary:hover, .btn--static.btn--primary:active { background: var(--accent); }
.btn--static.btn--ghost:hover, .btn--static.btn--ghost:active { background: transparent; border-color: var(--hairline-strong); color: var(--ink); }
.btn--static:hover .btn__arrow { transform: none; }
.btn--ghost {
  background: transparent; color: var(--ink);
  border-color: var(--hairline-strong);
}
.btn--ghost:hover { border-color: var(--ink); background: var(--surface); }
.btn--block { width: 100%; }
.btn .btn__arrow { transition: transform var(--dur-fast) var(--ease-out); }
.btn:hover .btn__arrow { transform: translateX(3px); }

/* ---- Inline link (underline draw) -------------------------------------- */
.link {
  color: var(--accent-press); font-weight: 500;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: color-mix(in srgb, var(--accent-press) 42%, transparent);
  transition: text-decoration-color var(--dur-fast) var(--ease-out),
              text-decoration-thickness var(--dur-fast) var(--ease-out);
}
.link:hover, .link:focus-visible { text-decoration-thickness: 2px; text-decoration-color: var(--accent-press); }

/* ---- Drawers (kit [data-eon-drawer] panel internals) ------------------ */
[data-eon-drawer] { display: flex; flex-direction: column; }
.drawer__head { display: flex; align-items: center; justify-content: space-between; padding: 1.2rem 1.4rem; border-bottom: 1px solid var(--hairline); }
.drawer__head h3 { font-size: 1.1rem; }
.drawer__body { padding: 1.4rem; overflow-y: auto; }

/* ---- Tags / chips / badges --------------------------------------------- */
.chip {
  display: inline-flex; align-items: center; gap: 0.4em;
  padding: 0.3em 0.65em;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--ink-3);
  background: var(--surface);
}
.chip--verified { color: var(--accent-press); border-color: var(--accent-tint); background: var(--accent-tint); }
.chip--pass { color: var(--success); border-color: rgba(29,122,76,0.25); background: rgba(29,122,76,0.06); }
.chip .dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

/* ---- Card -------------------------------------------------------------- */
.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
  transition: transform var(--dur-fast) var(--ease-out-soft),
              box-shadow var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out);
}
.card--hover:hover {
  transform: translateY(var(--lift-card));
  box-shadow: var(--shadow-2);
  border-color: var(--hairline-strong);
}

/* ---- Nav --------------------------------------------------------------- */
#site-nav {
  position: sticky; top: 0;
  z-index: var(--z-nav);
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: saturate(1.1) blur(8px);
  -webkit-backdrop-filter: saturate(1.1) blur(8px);
  border-bottom: 1px solid color-mix(in srgb, var(--ink) 8%, transparent);
  transition: border-color var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out);
}
#site-nav.is-scrolled {
  background: color-mix(in srgb, var(--paper) 96%, transparent);
  border-bottom-color: color-mix(in srgb, var(--ink) 14%, transparent);
}
.nav__inner {
  display: flex; align-items: center; gap: var(--space-6);
  height: 64px;
}
.nav__brand {
  color: var(--ink); display: inline-flex; align-items: center; gap: 0.5em;
}
.nav__brand .brand-mark { width: 22px; height: 22px; }
.brand-logo { height: 34px; width: auto; display: block; }
.footer__brand .brand-logo { height: 46px; }
.nav__links { display: flex; align-items: center; gap: clamp(0.9rem, 1.6vw, 1.7rem); margin-left: var(--space-4); }
.nav__link {
  position: relative; font-size: var(--fs-sm); color: var(--ink-2); padding: 0.4em 0;
}
.nav__link::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 100%; height: 1px;
  background: var(--accent); transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur-fast) var(--ease-out);
}
.nav__link:hover { color: var(--ink); }
.nav__link:hover::after, .nav__link:focus-visible::after { transform: scaleX(1); }
.nav__actions { margin-left: auto; display: flex; align-items: center; gap: var(--space-3); }
.nav__icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: var(--radius-sm);
  color: var(--ink-2); border: 1px solid transparent;
  transition: background var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.nav__icon-btn:hover { background: var(--surface); border-color: var(--hairline); color: var(--ink); }
.nav__cart-count {
  font-family: var(--font-mono); font-size: 0.75rem; margin-left: 0.3em; color: var(--accent-press);
}
.nav__menu-toggle { display: none; }
@media (max-width: 940px) {
  .nav__links {
    display: none;
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0; margin-left: 0;
    background: var(--paper); border-bottom: 1px solid var(--hairline);
    padding: var(--space-2) var(--gutter) var(--space-4);
    box-shadow: var(--shadow-2);
  }
  .nav__links.is-open { display: flex; }
  .nav__links .nav__link { width: 100%; padding: 0.85em 0; border-bottom: 1px solid var(--hairline); }
  .nav__links .nav__link::after { display: none; }
  .nav__menu-toggle { display: inline-flex; }
}
@media (pointer: coarse) {
  .nav__icon-btn, .nav__menu-toggle { width: 44px; height: 44px; }
}

/* ---- Segmented control ------------------------------------------------- */
.seg {
  position: relative; display: inline-flex; flex-wrap: wrap;
  padding: 4px; gap: 2px;
  background: var(--surface); border: 1px solid var(--hairline);
  border-radius: var(--radius-pill);
}
.seg__btn {
  position: relative; z-index: 1;
  padding: 0.5em 1.1em; border-radius: var(--radius-pill);
  font-size: var(--fs-sm); color: var(--ink-3); font-weight: 500;
  transition: color var(--dur-fast) var(--ease-out);
}
.seg__btn[aria-selected="true"] { color: #fff; }
.seg__indicator {
  position: absolute; z-index: 0; top: 4px; left: 4px;
  height: calc(100% - 8px); /* initial; JS sets per-button height so it tracks wrapped rows */
  background: var(--accent); /* white active-tab label = 6.9:1 (AA) */
  border-radius: var(--radius-pill);
  transition: transform var(--dur-base) var(--ease-out), width var(--dur-base) var(--ease-out), height var(--dur-base) var(--ease-out);
  will-change: transform, width, height;
}
.seg__panels { position: relative; margin-top: var(--space-5); }
.seg__panel {
  position: absolute; inset: 0; opacity: 0; transform: translateY(8px);
  transition: opacity var(--dur-base) var(--ease-inout), transform var(--dur-base) var(--ease-inout);
  pointer-events: none;
}
.seg__panel.is-active { position: relative; opacity: 1; transform: none; pointer-events: auto; }

/* ---- Accordion --------------------------------------------------------- */
.accordion { border-top: 1px solid var(--hairline); }
.accordion__item { border-bottom: 1px solid var(--hairline); }
.accordion__trigger {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-4);
  width: 100%; text-align: left;
  padding: 1.35em 0.25em;
  font-size: var(--fs-h4); font-weight: 600; color: var(--ink);
}
.accordion__trigger:hover { color: var(--accent-press); }
.accordion__icon {
  flex: none; width: 20px; height: 20px; position: relative;
  transition: transform var(--dur-base) var(--ease-out);
}
.accordion__icon::before, .accordion__icon::after {
  content: ""; position: absolute; background: currentColor; border-radius: 2px;
}
.accordion__icon::before { top: 50%; left: 0; width: 100%; height: 1.5px; transform: translateY(-50%); }
.accordion__icon::after  { left: 50%; top: 0; height: 100%; width: 1.5px; transform: translateX(-50%); transition: opacity var(--dur-base) var(--ease-out); }
.accordion__trigger[aria-expanded="true"] .accordion__icon { transform: rotate(180deg); }
.accordion__trigger[aria-expanded="true"] .accordion__icon::after { opacity: 0; }
.accordion__panel { display: grid; grid-template-rows: 0fr; transition: grid-template-rows var(--dur-base) var(--ease-inout); }
.accordion__panel > div { overflow: hidden; }
.accordion__trigger[aria-expanded="true"] + .accordion__panel { grid-template-rows: 1fr; }
.accordion__answer { padding: 0 0.25em 1.6em; color: var(--ink-2); max-width: 68ch; }

/* ---- Marquee ----------------------------------------------------------- */
.marquee { position: relative; overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.marquee__track { display: flex; width: max-content; gap: 0; animation: marquee 46s linear infinite; }
.marquee:hover .marquee__track { animation-play-state: paused; }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }
.method-card {
  display: flex; flex-direction: column; gap: 0.35em;
  min-width: 280px; padding: 1.1rem 1.4rem;
  border-right: 1px solid var(--hairline);
}
.method-card__label { display: flex; align-items: center; gap: 0.5em; font-weight: 600; color: var(--ink); font-size: var(--fs-sm); }
.method-card__method { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.04em; color: var(--accent-press); text-transform: uppercase; }
.method-card__confirms { font-size: var(--fs-xs); color: var(--ink-3); }
.marquee.is-paused .marquee__track { animation-play-state: paused; }
.methods-band__control { display: flex; justify-content: flex-end; margin-top: var(--space-3); }
.marquee__toggle {
  font-family: var(--font-mono); font-size: var(--fs-eyebrow); letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--ink-3); background: var(--surface);
  border: 1px solid var(--hairline); border-radius: var(--radius-sm);
  padding: 0.45em 0.85em;
  transition: color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.marquee__toggle:hover { color: var(--ink); border-color: var(--hairline-strong); }
.marquee__toggle:active { opacity: 0.7; }
@media (prefers-reduced-motion: reduce) {
  .marquee { mask-image: none; -webkit-mask-image: none; }
  .marquee__track { animation: none; flex-wrap: wrap; width: 100%; }
  .methods-band__control { display: none; } /* no animation to pause */
}

/* ---- Spec table -------------------------------------------------------- */
.spec-table { width: 100%; border-collapse: collapse; border-top: 1px solid var(--hairline); }
.spec-row { border-bottom: 1px solid var(--hairline); }
.spec-row__head {
  display: grid; grid-template-columns: 1fr auto; align-items: center; gap: var(--space-4);
  width: 100%; text-align: left; padding: 1.05em 0.25em;
}
.spec-row__key { font-size: var(--fs-sm); color: var(--ink-3); font-family: var(--font-mono); letter-spacing: 0.04em; text-transform: uppercase; }
.spec-row__val { font-family: var(--font-mono); font-variant-numeric: tabular-nums; font-feature-settings: "zero" 1; color: var(--ink); font-size: 0.95rem; text-align: right; }
.spec-row__val .unit { color: var(--ink-3); }
.spec-row__note { display: grid; grid-template-rows: 0fr; transition: grid-template-rows var(--dur-base) var(--ease-inout); }
.spec-row__note > div { overflow: hidden; }
.spec-row.is-open .spec-row__note { grid-template-rows: 1fr; }
.spec-row__note p { padding: 0 0.25em 1.1em; color: var(--ink-2); font-size: var(--fs-sm); max-width: 64ch; }
.spec-row__head .accordion__icon { width: 16px; height: 16px; color: var(--muted); }
.spec-row.is-open .spec-row__head .accordion__icon { transform: rotate(180deg); }
.spec-row.is-open .spec-row__head .accordion__icon::after { opacity: 0; }

/* ---- Data figure (count-up) -------------------------------------------- */
.figure {
  font-family: var(--font-mono); font-weight: 500;
  font-variant-numeric: tabular-nums; font-feature-settings: "zero" 1;
  font-size: var(--fs-figure); line-height: 1; color: var(--ink);
  letter-spacing: -0.01em;
}
.figure--accent { color: var(--accent-press); }
.figure-label { font-size: var(--fs-xs); color: var(--ink-3); margin-top: 0.5em; }

/* ---- Chromatogram / analytical frame ----------------------------------- */
.plot {
  position: relative; background: var(--surface);
  border: 1px solid var(--hairline); border-radius: var(--radius-sm);
}
.plot svg { width: 100%; height: auto; display: block; }
.plot__grid line { stroke: var(--hairline); stroke-width: 1; }
.plot__trace { fill: none; stroke: var(--trace); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.plot__fill { fill: url(#traceFill); opacity: 0.9; }
.plot__axis-label { font-family: var(--font-mono); font-size: 13px; fill: var(--ink-3); letter-spacing: 0.04em; }
.plot__peak-label { font-family: var(--font-mono); font-size: 13px; fill: var(--accent-press); }

/* ---- COA modal (PDF viewer) ------------------------------------------- */
.coa-modal { position: fixed; inset: 0; z-index: 1000; display: none; }
.coa-modal[aria-hidden="false"] { display: flex; align-items: center; justify-content: center; padding: 4vh 3vw; }
.coa-modal__backdrop { position: absolute; inset: 0; background: rgba(16,24,32,0.55); backdrop-filter: blur(3px); -webkit-backdrop-filter: blur(3px); animation: coaFade 0.2s var(--ease-out); }
.coa-modal__panel { position: relative; width: min(920px, 100%); height: 92vh; display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--hairline); border-radius: var(--radius-lg); box-shadow: var(--shadow-3); overflow: hidden; animation: coaPop 0.26s var(--ease-out); }
.coa-modal__head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1rem 1.3rem; border-bottom: 1px solid var(--hairline); flex: none; }
.coa-modal__title-wrap { display: flex; flex-direction: column; gap: 0.25rem; }
.coa-modal__title { color: var(--ink); font-size: 1.05rem; }
.coa-modal__actions { display: flex; align-items: center; gap: 0.6rem; flex: none; }
.coa-modal__close { width: 40px; height: 40px; border-radius: var(--radius-sm); color: var(--ink-2); font-size: 1.1rem; transition: background var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out); }
.coa-modal__close:hover { background: var(--paper-sunk); color: var(--ink); }
.coa-modal__body { flex: 1; min-height: 0; background: var(--paper-sunk); }
.coa-modal__frame { width: 100%; height: 100%; border: 0; display: block; }
@keyframes coaFade { from { opacity: 0; } }
@keyframes coaPop { from { opacity: 0; transform: translateY(12px) scale(0.985); } }
@media (prefers-reduced-motion: reduce) { .coa-modal__backdrop, .coa-modal__panel { animation: none; } }

/* COA embed (inline preview on the product page) */
.coa-embed { width: 100%; height: 440px; border: 1px solid var(--hairline); border-radius: var(--radius-sm); display: block; background: var(--paper-sunk); }
.plot__peak-line { stroke: var(--accent); stroke-width: 1; stroke-dasharray: 2 3; opacity: 0.5; }