/* ALT Intelligence — công cụ trên web. Dùng token của theme, có giá trị dự phòng. */
.ai-tool, .ai-compare { --ai-line: var(--line, #dcdcd7); --ai-gold: var(--gold, #a98752); --ai-ink: var(--ink, #10110f); --ai-muted: var(--muted, #6d6e69); --ai-paper: var(--paper, #fff); --ai-danger: var(--danger, #7b4044); }
.ai-tool { max-width: 720px; margin: 0 auto; background: var(--ai-paper); border: 1px solid var(--ai-line); padding: clamp(1.25rem, 4vw, 2.25rem); scroll-margin-top: 90px; }
.ai-head { margin-bottom: 1rem; }
.ai-title { font-family: var(--font-display, Georgia, serif); font-size: clamp(1.6rem, 4vw, 2.1rem); line-height: 1.15; margin: 0 0 .4rem; }
.ai-sub { color: var(--ai-muted); margin: 0; }
.ai-progress { height: 3px; background: var(--ai-line); margin: 1rem 0 .4rem; }
.ai-progress span { display: block; height: 100%; background: var(--ai-gold); width: 0; transition: width .3s ease; }
.ai-steplabel { font-size: .8rem; letter-spacing: .06em; text-transform: uppercase; color: var(--ai-muted); margin: 0 0 1rem; }
.ai-steptitle { font-size: 1.15rem; margin: 0 0 1rem; outline: none; }
.ai-body fieldset { border: 0; padding: 0; margin: 0 0 1.25rem; min-width: 0; }
.ai-body legend, .ai-field label { display: block; font-weight: 600; font-size: .92rem; margin-bottom: .5rem; }
.ai-chip-row { display: flex; flex-wrap: wrap; gap: .5rem; }
.ai-chip { position: relative; display: inline-flex; }
.ai-chip input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.ai-chip span { display: inline-flex; align-items: center; min-height: 44px; padding: .55rem .95rem; border: 1px solid var(--ai-line); background: var(--ai-paper); font-size: .92rem; line-height: 1.25; cursor: pointer; transition: border-color .15s, background .15s; }
.ai-chip input:checked + span { border-color: var(--ai-ink); background: var(--ai-ink); color: #fff; }
.ai-chip input:focus-visible + span { outline: 2px solid var(--ai-gold); outline-offset: 2px; }
.ai-chip:hover span { border-color: var(--ai-ink); }
.ai-field { margin: 0 0 1.1rem; }
.ai-field input, .ai-field textarea { width: 100%; min-height: 46px; padding: .65rem .8rem; border: 1px solid var(--ai-line); background: #fff; font: inherit; font-size: 16px; color: var(--ai-ink); border-radius: 0; box-sizing: border-box; }
.ai-field input:focus, .ai-field textarea:focus { outline: 2px solid var(--ai-gold); outline-offset: 0; border-color: var(--ai-gold); }
.ai-grid2 { display: grid; gap: 0 1rem; grid-template-columns: 1fr; }
@media (min-width: 560px) { .ai-grid2 { grid-template-columns: 1fr 1fr; } }
.ai-consent { display: flex; gap: .6rem; align-items: flex-start; margin: .5rem 0 1rem; font-size: .88rem; color: var(--ai-muted); }
.ai-consent input { width: 20px; height: 20px; margin-top: .1rem; flex: none; accent-color: var(--ai-ink); }
.ai-hp { position: absolute !important; left: -9999px !important; width: 1px; height: 1px; overflow: hidden; }
.has-error > input, .has-error > textarea, .has-error .ai-chip span { border-color: var(--ai-danger); }
.ai-error { color: var(--ai-danger); font-size: .86rem; margin: .4rem 0 0; }
.ai-nav { display: flex; gap: .75rem; justify-content: space-between; flex-wrap: wrap; margin-top: .5rem; }
.ai-nav .ai-next { margin-left: auto; min-width: 180px; }
.ai-nav .btn { min-height: 46px; }
.ai-nav .btn[disabled] { opacity: .6; cursor: progress; }
.ai-trust { font-size: .8rem; color: var(--ai-muted); margin: 1rem 0 0; }
.ai-live { position: absolute; left: -9999px; }
.ai-done { outline: none; }
.ai-code { font-size: 1.05rem; display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; padding: .9rem 1rem; background: var(--cream, #f3f3f1); margin: 1rem 0; }
.ai-code strong { font-size: 1.3rem; letter-spacing: .04em; }
.ai-copy { border: 1px solid var(--ai-ink); background: transparent; padding: .35rem .7rem; cursor: pointer; font: inherit; font-size: .85rem; min-height: 36px; }
.ai-steps, .ai-factors { padding-left: 1.2rem; line-height: 1.6; }
.ai-steps li, .ai-factors li { margin-bottom: .4rem; }
.ai-actions { display: flex; gap: .75rem; flex-wrap: wrap; margin: 1.25rem 0; }

/* Nút so sánh trên thẻ sản phẩm */
.alt-compare-btn { background: transparent; border: 1px solid var(--line, #dcdcd7); padding: .4rem .7rem; font: inherit; font-size: .8rem; cursor: pointer; min-height: 36px; color: inherit; }
.alt-compare-btn.is-on { background: var(--ink, #10110f); color: #fff; border-color: var(--ink, #10110f); }
.ai-cmpbar { position: fixed; left: 50%; transform: translateX(-50%); bottom: calc(env(safe-area-inset-bottom, 0) + 84px); z-index: 60; display: flex; align-items: center; gap: .75rem; background: var(--ink, #10110f); color: #fff; padding: .55rem .6rem .55rem 1rem; box-shadow: 0 12px 30px -12px rgba(0,0,0,.5); max-width: calc(100vw - 32px); }
.ai-cmpbar[hidden] { display: none; }
.ai-cmpbar .btn { min-height: 40px; padding: .45rem .9rem; white-space: nowrap; letter-spacing: .04em; }
.ai-cmpbar-clear { background: transparent; color: #fff; border: 0; text-decoration: underline; cursor: pointer; font: inherit; font-size: .85rem; }
.ai-cmpbar-label { font-size: .88rem; white-space: nowrap; }

/* Bảng so sánh */
.ai-compare { max-width: 1100px; margin: 0 auto; }
.ai-cmp-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 0 0 2.5rem; }
.ai-cmp-table { width: 100%; min-width: 560px; border-collapse: collapse; font-size: .92rem; }
.ai-cmp-table th, .ai-cmp-table td { border-bottom: 1px solid var(--line, #dcdcd7); padding: .7rem .6rem; text-align: left; vertical-align: top; }
.ai-cmp-table thead th { vertical-align: bottom; }
.ai-cmp-table thead img { display: block; width: 100%; max-width: 200px; height: auto; aspect-ratio: 4 / 5; object-fit: cover; margin-bottom: .5rem; }
.ai-cmp-table tbody th { width: 140px; color: var(--muted, #6d6e69); font-weight: 500; }
.ai-cmp-table tr.is-diff td { background: #faf7f0; }
.ai-cmp-name { display: block; font-weight: 600; margin-bottom: .35rem; }
.ai-cmp-remove { background: none; border: 0; padding: 0; text-decoration: underline; cursor: pointer; font: inherit; font-size: .8rem; color: var(--muted, #6d6e69); }
.alt-intel-section { padding: clamp(2.5rem, 6vw, 4.5rem) 0; }
.product-intel-links { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem 1.25rem; margin-top: 1.25rem; padding-top: 1.25rem; border-top: 1px solid var(--line, #dcdcd7); font-size: .9rem; }
.card-foot .alt-compare-btn { flex: none; }