/* ============================================================
   deepdive.css — shared visual components for the long-form explainer
   pages (frontier-power-usa.html, rights-offering.html). Extends the
   site theme in styles.css; uses only existing CSS variables.
   ============================================================ */

.dd-top { position: sticky; top: 0; z-index: 60; background: var(--bg-0); border-bottom: 1px solid var(--line-1); }
.dd-top__in { max-width: 920px; margin: 0 auto; padding: 12px 24px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.dd-back { display: inline-flex; align-items: center; gap: 8px; font-size: 13.5px; color: var(--fg-1); font-weight: 600; }
.dd-back:hover { color: var(--accent); }
.dd-top__tag { font-size: 12px; color: var(--fg-3); font-family: var(--font-mono); }

.dd { max-width: 920px; margin: 0 auto; padding: 0 24px 96px; }
.dd-hero { padding: 48px 0 8px; border-bottom: 1px solid var(--line-1); margin-bottom: 8px; }
.dd-eyebrow { color: var(--accent); font-weight: 700; letter-spacing: .14em; text-transform: uppercase; font-size: 12px; }
.dd-hero h1 { font-size: 40px; line-height: 1.08; letter-spacing: -0.02em; margin: 14px 0 6px; font-weight: 700; }
.dd-hero .sub { font-size: 18px; color: var(--fg-1); font-weight: 500; }
.dd-meta { color: var(--fg-3); font-size: 13px; margin-top: 14px; font-family: var(--font-mono); }

.callout { border-left: 3px solid var(--accent); background: var(--accent-soft); padding: 18px 20px; border-radius: 12px; margin: 22px 0; font-size: 15.5px; line-height: 1.6; }
.callout b, .callout strong { color: var(--fg-0); }
.callout--warn { border-color: var(--negative); background: var(--negative-soft); }
.callout--warn .lead { color: var(--negative); font-weight: 700; }
.callout .lead { display: block; color: var(--accent); font-weight: 700; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 6px; }

.dd-sec { padding-top: 52px; }
.dd-sec__num { color: var(--accent); font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .08em; font-weight: 600; }
.dd-sec h2 { font-size: 26px; letter-spacing: -0.015em; margin: 6px 0 4px; font-weight: 600; }
.dd-sec h3 { font-size: 17px; margin: 26px 0 8px; font-weight: 600; color: var(--fg-0); }
.dd p { color: var(--fg-1); font-size: 15.5px; line-height: 1.65; margin: 12px 0; }
.dd a.inline { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
.dd ul.bullets { margin: 12px 0; padding-left: 22px; }
.dd ul.bullets li { color: var(--fg-1); font-size: 15px; line-height: 1.7; }

/* Comparison table */
.compare { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 14.5px; }
.compare th, .compare td { padding: 12px 14px; border-bottom: 1px solid var(--line-1); text-align: left; }
.compare thead th { font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--fg-2); }
.compare th:first-child { color: var(--fg-2); font-weight: 500; }
.compare .col-eos { background: var(--accent-soft); color: var(--fg-0); font-weight: 600; }
.compare thead .col-eos { color: var(--accent); }
.compare .col-li { color: var(--fg-2); }

/* Timeline */
.timeline { position: relative; margin: 22px 0; padding-left: 28px; }
.timeline::before { content: ''; position: absolute; left: 7px; top: 4px; bottom: 4px; width: 2px; background: var(--line-2); }
.tl-item { position: relative; padding: 0 0 20px 0; }
.tl-item::before { content: ''; position: absolute; left: -28px; top: 3px; width: 16px; height: 16px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px var(--bg-0); }
.tl-item.is-pending::before { background: var(--warning); }
.tl-item.is-done::before { background: var(--fg-3); }
.tl-date { font-family: var(--font-mono); font-size: 12.5px; color: var(--accent); font-weight: 600; }
.tl-item.is-pending .tl-date { color: var(--warning); }
.tl-item.is-done .tl-date { color: var(--fg-3); }
.tl-body { color: var(--fg-1); font-size: 14.5px; margin-top: 2px; }
.tl-body b { color: var(--fg-0); }

/* Capital-stack diagram */
.stack { border: 1px solid var(--line-2); border-radius: var(--r-lg); overflow: hidden; margin: 22px 0; background: var(--bg-1); }
.stack__top { background: linear-gradient(90deg, var(--accent-soft), transparent); padding: 16px 20px; font-weight: 700; font-size: 16px; border-bottom: 1px solid var(--line-1); letter-spacing: -0.01em; }
.stack__top small { display: block; font-weight: 500; font-size: 12.5px; color: var(--fg-2); letter-spacing: 0; margin-top: 2px; }
.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line-1); }
.pillar { background: var(--bg-1); padding: 18px; }
.pillar__icon { font-size: 24px; }
.pillar__name { font-weight: 700; font-size: 15px; margin-top: 8px; }
.pillar__amt { font-size: 20px; font-weight: 700; margin-top: 6px; font-variant-numeric: tabular-nums; }
.pillar--eos .pillar__amt { color: var(--accent); }
.pillar--cerberus .pillar__amt { color: var(--blue, #58a6ff); }
.pillar--ariel .pillar__amt { color: var(--warning); }
.pillar__role { font-size: 12.5px; color: var(--fg-3); margin-top: 2px; }
.pillar ul { margin: 12px 0 0; padding-left: 18px; }
.pillar li { font-size: 13px; color: var(--fg-1); line-height: 1.6; }
.stack__debt { padding: 14px 20px; border-top: 1px solid var(--line-1); background: var(--bg-2); font-size: 13.5px; color: var(--fg-1); }
.stack__target { padding: 14px 20px; border-top: 1px solid var(--line-1); font-size: 13.5px; color: var(--fg-2); }
.stack__target b { color: var(--fg-0); }

/* Stat cards */
.stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin: 20px 0; }
.stat { background: var(--bg-1); border: 1px solid var(--line-1); border-radius: var(--r-md); padding: 16px 18px; }
.stat__label { font-size: 12px; color: var(--fg-2); text-transform: uppercase; letter-spacing: .05em; }
.stat__value { font-size: 24px; font-weight: 700; margin-top: 6px; font-variant-numeric: tabular-nums; }
.stat__value.pos { color: var(--positive); }
.stat__value.neg { color: var(--negative); }
.stat__note { font-size: 13px; color: var(--fg-2); margin-top: 6px; line-height: 1.5; }

/* Bull/Bear */
.bb { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 20px 0; }
.bb__col { border: 1px solid var(--line-1); border-radius: var(--r-lg); padding: 18px; }
.bb__col.bull { border-left: 3px solid var(--positive); }
.bb__col.bear { border-left: 3px solid var(--negative); }
.bb__h { font-weight: 700; font-size: 15px; margin-bottom: 10px; }
.bb__col.bull .bb__h { color: var(--positive); }
.bb__col.bear .bb__h { color: var(--negative); }
.bb__col ol { margin: 0; padding-left: 20px; }
.bb__col li { font-size: 14px; line-height: 1.6; color: var(--fg-1); margin-bottom: 12px; }
.bb__col li b { color: var(--fg-0); }

/* Key numbers + general table */
.keytable { width: 100%; border-collapse: collapse; font-size: 14.5px; margin: 16px 0; }
.keytable td { padding: 11px 14px; border-bottom: 1px solid var(--line-1); }
.keytable td:first-child { color: var(--fg-2); }
.keytable td:last-child { text-align: right; font-weight: 600; font-variant-numeric: tabular-nums; }

/* "What you can do" decision cards (rights-offering page) */
.actions { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 20px 0; }
.action-card { border: 1px solid var(--line-1); border-radius: var(--r-lg); padding: 18px; background: var(--bg-1); }
.action-card__tag { font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; padding: 4px 10px; border-radius: 999px; display: inline-block; }
.action-card--keep .action-card__tag { background: var(--positive-soft); color: var(--positive); }
.action-card--sell .action-card__tag { background: var(--accent-soft); color: var(--accent); }
.action-card--skip .action-card__tag { background: var(--negative-soft); color: var(--negative); }
.action-card h4 { margin: 12px 0 6px; font-size: 16px; font-weight: 700; }
.action-card p { font-size: 13.5px; color: var(--fg-1); line-height: 1.55; margin: 0; }
.action-card .out { margin-top: 10px; font-size: 12.5px; color: var(--fg-2); border-top: 1px dashed var(--line-1); padding-top: 8px; }

/* Neutral worked-example / info box */
.note-box { background: var(--bg-2); border: 1px solid var(--line-1); border-radius: var(--r-md); padding: 18px 20px; margin: 20px 0; }
.note-box h4 { margin: 0 0 10px; font-size: 13px; text-transform: uppercase; letter-spacing: .06em; color: var(--fg-2); }
.note-box .row { display: flex; justify-content: space-between; gap: 16px; padding: 6px 0; border-bottom: 1px dashed var(--line-1); font-size: 14px; }
.note-box .row:last-child { border-bottom: 0; }
.note-box .row b { font-variant-numeric: tabular-nums; }

/* "Listen to this page" audio bar */
.listen { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin: 18px 0 4px; padding: 14px 18px; border: 1px solid var(--line-2); border-left: 3px solid var(--accent); border-radius: var(--r-lg); background: linear-gradient(90deg, var(--accent-soft), transparent 70%); }
.listen__btn { display: inline-grid; place-items: center; width: 42px; height: 42px; border-radius: 50%; background: var(--accent); color: #02130E; font-size: 15px; flex: none; transition: opacity .15s, transform .15s; }
.listen__btn:hover { opacity: .9; transform: scale(1.04); }
.listen__txt { flex: 1; min-width: 180px; }
.listen__title { font-weight: 600; font-size: 14.5px; color: var(--fg-0); }
.listen__sub { font-size: 12.5px; color: var(--fg-2); margin-top: 1px; }
.listen__time { font-family: var(--font-mono); font-size: 12px; color: var(--fg-2); font-variant-numeric: tabular-nums; white-space: nowrap; }

.dd-foot { margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--line-1); color: var(--fg-3); font-size: 12.5px; line-height: 1.6; }
.dd-foot a { color: var(--accent); }
.dd-sources { margin-top: 14px; }
.dd-sources li { margin-bottom: 6px; }

@media (max-width: 720px) {
  .dd-hero h1 { font-size: 30px; }
  .pillars { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; }
  .bb { grid-template-columns: 1fr; }
  .actions { grid-template-columns: 1fr; }
  .compare { display: block; overflow-x: auto; white-space: nowrap; }
}

/* ========== Rights-offering interactive calculator (.roi-*) ==========
   Namespaced so it can't collide with the site's generic .card/.row/.compare/
   .legend/.chip classes. Restyled from a standalone tool to the EOS dark-green
   theme via the shared CSS variables. */
.roi { margin-top: 8px; }
.roi-inputs { display: grid; grid-template-columns: 220px 1fr; gap: 14px; margin-bottom: 14px; }
@media (max-width: 640px) { .roi-inputs { grid-template-columns: 1fr; } }
.roi-ctrl { background: var(--bg-2); border: 1px solid var(--line-1); border-radius: var(--r-lg); padding: 14px 16px; }
.roi-ctrl label { display: flex; justify-content: space-between; align-items: baseline; font-size: 12.5px; color: var(--fg-2); margin-bottom: 10px; gap: 8px; }
.roi-ctrl label output { font-family: var(--font-mono); font-size: 18px; color: var(--fg-0); font-weight: 600; white-space: nowrap; }
.roi-ctrl small { display: block; color: var(--fg-3); font-size: 11px; margin-top: 8px; line-height: 1.45; }
.roi input[type=range] { width: 100%; accent-color: var(--accent); cursor: pointer; height: 22px; }
.roi input[type=number] { width: 100%; background: var(--bg-3); border: 1px solid var(--line-1); border-radius: 10px; color: var(--fg-0);
  font-family: var(--font-mono); font-size: 20px; font-weight: 600; padding: 8px 12px; }
.roi input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 6px; }

.roi-flow { background: var(--bg-2); border: 1px solid var(--accent-line); border-radius: var(--r-lg); padding: 16px; margin-bottom: 14px;
  display: flex; align-items: stretch; gap: 0; flex-wrap: wrap; }
.roi-step { flex: 1 1 120px; text-align: center; padding: 4px 10px; position: relative; }
.roi-step + .roi-step::before { content: '→'; position: absolute; left: -9px; top: 50%; transform: translateY(-58%); color: var(--fg-3); font-size: 16px; }
.roi-step .n { font-family: var(--font-mono); font-size: clamp(19px, 2.6vw, 24px); font-weight: 600; color: var(--fg-0); }
.roi-step .n em { font-style: normal; color: var(--accent); }
.roi-step .l { font-size: 11px; color: var(--fg-2); margin-top: 3px; letter-spacing: .02em; }
@media (max-width: 640px) { .roi-step + .roi-step::before { content: '↓'; left: 50%; top: -11px; transform: translateX(-50%); } }

.roi-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 14px; }
@media (max-width: 640px) { .roi-compare { grid-template-columns: 1fr; } }
.roi-card { background: var(--bg-2); border: 1px solid var(--line-1); border-radius: var(--r-lg); padding: 16px 18px; }
.roi-card--units { border-color: var(--accent-line); }
.roi-card h3 { font-size: 13.5px; font-weight: 600; display: flex; gap: 8px; align-items: center; }
.roi-dot { width: 9px; height: 9px; border-radius: 50%; flex: none; }
.roi-dot--a { background: var(--accent); } .roi-dot--s { background: var(--brand-violet); }
.roi-card .roi-desc { font-size: 11.5px; color: var(--fg-3); font-family: var(--font-mono); margin: 3px 0 12px; }
.roi-profit { font-family: var(--font-mono); font-size: clamp(24px, 3.4vw, 30px); font-weight: 600; letter-spacing: -.02em; }
.roi-profit.up { color: var(--positive); } .roi-profit.down { color: var(--negative); } .roi-profit.flat { color: var(--fg-2); }
.roi-profitl { font-size: 11.5px; color: var(--fg-2); margin-bottom: 12px; }
.roi-rows { border-top: 1px solid var(--line-1); padding-top: 10px; display: grid; gap: 6px; }
.roi-row { display: flex; justify-content: space-between; font-size: 12.5px; }
.roi-row span:first-child { color: var(--fg-2); }
.roi-row span:last-child { font-family: var(--font-mono); color: var(--fg-1); }

.roi-delta { background: var(--bg-3); border: 1px solid var(--line-1); border-radius: var(--r-lg); padding: 14px 18px; font-size: 13.5px; color: var(--fg-2); margin-bottom: 14px; }
.roi-delta b { color: var(--fg-0); } .roi-delta .win { color: var(--positive); font-weight: 600; } .roi-delta .lose { color: var(--negative); font-weight: 600; }
.roi-delta .lead { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .14em; text-transform: uppercase; display: block; margin-bottom: 5px; color: var(--accent); }

.roi-board { background: var(--bg-2); border: 1px solid var(--line-1); border-radius: var(--r-lg); padding: 14px 14px 4px; }
.roi-board svg { width: 100%; height: auto; display: block; }
.roi-legend { display: flex; gap: 20px; font-size: 11.5px; color: var(--fg-2); padding: 6px 4px 10px; font-family: var(--font-mono); flex-wrap: wrap; }
.roi-chip { display: inline-flex; align-items: center; gap: 6px; }
.roi-sw { width: 16px; border-top: 3px solid; }
.roi-sw--a { border-color: var(--accent); } .roi-sw--s { border-color: var(--brand-violet); }