/* ==========================================================================
   COA library, COA cards, COA details, single COA page.
   Path: wp-content/themes/arch-research/assets/css/coa.css — New file
   ========================================================================== */
.arc-coalib__intro { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: clamp(24px, 4vw, 56px); align-items: end; margin-bottom: clamp(28px, 4vw, 44px); }
.arc-coalib__intro .arc-h2 { font-size: clamp(26px, 3vw, 40px); }
.arc-coalib__stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-radius: var(--r-lg); overflow: hidden; background: var(--grad); color: #fff; box-shadow: var(--shadow); }
.arc-coalib__stats > div { padding: 22px 20px; display: grid; gap: 6px; align-content: start; }
.arc-coalib__stats > div + div { border-left: 1px solid rgba(255, 255, 255, .22); }
.arc-coalib__stats dt { font-size: 13px; opacity: .85; line-height: 1.3; }
.arc-coalib__stats dd { font: 700 clamp(22px, 2.4vw, 32px)/1.1 var(--font-head); }
@media (max-width: 900px) { .arc-coalib__intro { grid-template-columns: 1fr; } }
@media (max-width: 520px) { .arc-coalib__stats { grid-template-columns: 1fr; } .arc-coalib__stats > div + div { border-left: 0; border-top: 1px solid rgba(255, 255, 255, .22); } .arc-coalib__stats > div { grid-template-columns: 1fr auto; align-items: center; padding: 14px 18px; } }

.arc-coabar { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; padding: 12px; border-radius: var(--r-xl); background: var(--mist); border: 1px solid var(--line); }
.arc-coasearch { flex: 1 1 360px; position: relative; display: flex; align-items: center; height: 56px; padding: 0 8px 0 20px; border-radius: var(--r-pill); background: #fff; border: 1px solid var(--line-2); transition: border-color .2s, box-shadow .2s; }
.arc-coasearch:focus-within { border-color: var(--teal); box-shadow: var(--focus); }
.arc-coasearch > .arc-i { color: var(--teal); width: 22px; height: 22px; }
.arc-coasearch input { flex: 1; min-width: 0; height: 100%; border: 0; outline: 0; background: transparent; padding: 0 12px; font-size: 16.5px; }
.arc-coasearch input::-webkit-search-cancel-button { cursor: pointer; }
.arc-coasearch__count { flex: none; padding: 8px 14px; border-radius: 99px; background: var(--mist); color: var(--muted); font-size: 13.5px; white-space: nowrap; }
.arc-coasearch__count strong { color: var(--ink); }
.arc-coabar__tools { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.arc-coabar__tools .arc-select select { height: 56px; }
@media (max-width: 640px) { .arc-coabar { border-radius: var(--r-lg); } .arc-coabar__tools, .arc-coabar__tools .arc-select, .arc-coabar__tools select { width: 100%; } .arc-coasearch__count { display: none; } }
.arc-coalib__help { display: flex; align-items: center; gap: 8px; margin: 14px 0 26px !important; color: var(--muted); font-size: 14.5px; }
.arc-coalib__help .arc-i { width: 18px; height: 18px; color: var(--teal); }

.arc-match { display: flex; gap: 14px; align-items: center; padding: 14px 18px; margin-bottom: 20px; border-radius: var(--r); background: var(--teal-tint); color: var(--teal-deep); animation: arcrise .35s var(--ease); }
.arc-match > .arc-i { width: 30px; height: 30px; color: var(--teal-text); }
.arc-match strong { display: block; font-family: var(--font-head); }

/* COA card */
.arc-coa { display: flex; flex-direction: column; border-radius: 18px; border: 1px solid var(--line); background: #fff; overflow: hidden; transition: box-shadow .3s var(--ease), border-color .3s, transform .3s var(--ease); }
.arc-coa:hover { border-color: rgba(var(--teal-rgb), .7); box-shadow: 0 20px 40px -26px rgba(var(--navy-rgb), .45); transform: translateY(-2px); }
.arc-coa.is-hit { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(var(--teal-rgb), .35); }
.arc-coa.is-archived { opacity: .82; }
.arc-coa__media { position: relative; }
.arc-coa__media .arc-stage { aspect-ratio: 16 / 11; }
.arc-coa__media .arc-stage__img { width: 64%; height: 90%; }
.arc-coa__verified { position: absolute; left: 12px; top: 12px; display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border-radius: 99px; background: rgba(255, 255, 255, .94); color: var(--teal-text); font: 600 12px/1.2 var(--font-head); box-shadow: var(--shadow-sm); }
.arc-coa__verified .arc-i { width: 16px; height: 16px; }
.arc-coa__verified.is-sample { color: var(--warn); }
.arc-coa__body { flex: 1; display: flex; flex-direction: column; gap: 14px; padding: 18px 18px 20px; }
.arc-coa__title { font-size: 19px !important; line-height: 1.3 !important; }
.arc-coa__meta { display: grid; gap: 0; margin: 0; }
.arc-coa__meta > div { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 9px 0; border-top: 1px dashed var(--line); font-size: 14.5px; }
.arc-coa__meta dt { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); }
.arc-coa__meta dt .arc-i { width: 16px; height: 16px; color: var(--teal); }
.arc-coa__meta dd { font-weight: 600; text-align: right; }
.arc-coa__actions { margin-top: auto; display: flex; gap: 8px; align-items: center; }
.arc-coa__actions .arc-btn { flex: 1; padding: 0 12px; font-size: 14.5px; }
.arc-coa__dl { flex: none; width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; border: 1px solid var(--line-2); color: var(--navy); transition: all .2s; }
.arc-coa__dl:hover { background: var(--grad); color: #fff; border-color: transparent; }
.arc-coa__dl .arc-i { width: 18px; height: 18px; }
.arc-coagrid { margin-bottom: 8px; }

/* How to verify */
.arc-howto { margin-top: clamp(48px, 6vw, 88px); }
.arc-howto__steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; counter-reset: s; }
.arc-howto__steps li { position: relative; padding: 28px 24px 24px; border-radius: var(--r-lg); border: 1px solid var(--line); background: #fff; overflow: hidden; }
.arc-howto__steps li::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 4px; background: var(--grad); }
.arc-howto__steps .arc-i { width: 34px; height: 34px; color: var(--teal); margin-bottom: 14px; }
.arc-howto__steps h3 { font-size: 19px !important; margin-bottom: 8px !important; }
.arc-howto__steps p { color: var(--muted); font-size: 15px; }
.arc-howto__n { position: absolute; right: 18px; top: 10px; font: 800 54px/1 var(--font-head); color: rgba(var(--navy-rgb), .06); }
@media (max-width: 800px) { .arc-howto__steps { grid-template-columns: 1fr; } }

/* COA details (product tab + single) */
.arc-coadetail { display: grid; gap: 14px; }
.arc-coadetail .arc-kv { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 4px 16px; }

/* Single COA */
.arc-coa-single { display: grid; grid-template-columns: 380px minmax(0, 1fr); gap: clamp(24px, 4vw, 48px); align-items: start; }
.arc-coa-single__meta { position: sticky; top: var(--arc-sticky-top); display: grid; gap: 16px; }
.arc-coa-single__product .arc-stage { border-radius: var(--r-lg); border: 1px solid rgba(var(--teal-rgb), .5); }
.arc-coa-single__doc { min-height: 70vh; border-radius: var(--r-lg); border: 1px solid var(--line); overflow: hidden; background: #E9EEF3; }
.arc-coa-single__doc iframe { width: 100%; height: 86vh; border: 0; display: block; background: #fff; }
.arc-coa-single__doc img { display: block; width: 100%; }
@media (max-width: 900px) { .arc-coa-single { grid-template-columns: 1fr; } .arc-coa-single__meta { position: static; } }