/* AI Rebounding — styles */
:root {
  --ink: #14213d;
  --ink-2: #33415c;
  --muted: #5c6b84;
  --line: #dfe5ee;
  --paper: #fbfaf7;
  --tint: #f1f4f9;
  --accent: #f2994a;
  --accent-dark: #c96a1b;
  --sky: #8fa6c9;
  --radius: 14px;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body { margin: 0; font-family: var(--sans); color: var(--ink); background: var(--paper); line-height: 1.6; font-size: 17px; }
img, svg { max-width: 100%; }
a { color: var(--accent-dark); }
h1, h2, h3 { font-family: var(--serif); line-height: 1.15; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(2.6rem, 6vw, 4.4rem); }
h2 { font-size: clamp(1.8rem, 3.6vw, 2.6rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; }
.wrap { width: min(1140px, 100% - 40px); margin-inline: auto; }
.small { font-size: .88rem; color: var(--muted); }
.skip { position: absolute; left: -9999px; top: 0; background: var(--ink); color: #fff; padding: 8px 14px; z-index: 100; }
.skip:focus { left: 10px; top: 10px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

/* Buttons */
.btn { display: inline-block; background: var(--ink); color: #fff; border: 2px solid var(--ink); padding: .8em 1.4em; border-radius: 999px; font: 600 1rem var(--sans); text-decoration: none; cursor: pointer; transition: transform .15s, background .15s, color .15s; }
.btn:hover { transform: translateY(-2px); background: var(--accent-dark); border-color: var(--accent-dark); }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: #fff; border-color: var(--ink); }
.btn-small { padding: .45em 1em; font-size: .92rem; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(251,250,247,.92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.brand { display: inline-flex; align-items: center; gap: .55em; font: 700 1.15rem var(--serif); color: var(--ink); text-decoration: none; }
.brand-mark { width: 30px; height: 30px; color: var(--ink); }
.nav-links { display: flex; align-items: center; gap: 1.6rem; }
.nav-links a:not(.btn) { color: var(--ink-2); text-decoration: none; font-weight: 500; }
.nav-links a:not(.btn):hover { color: var(--accent-dark); }
.nav-links .btn { color: #fff; }
.nav-toggle { display: none; background: none; border: 0; padding: 10px; cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--ink); margin: 5px 0; transition: .2s; }

/* Hero */
.hero { padding: clamp(48px, 8vw, 110px) 0 60px; background: radial-gradient(ellipse at 85% 10%, #fde7d3 0, transparent 50%), radial-gradient(ellipse at 0% 100%, #e3eaf5 0, transparent 55%); }
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; align-items: center; }
.hero h1 span { color: var(--accent-dark); font-style: italic; }
.eyebrow { text-transform: uppercase; letter-spacing: .12em; font-size: .78rem; font-weight: 700; color: var(--accent-dark); margin-bottom: .9em; }
.lede { font-size: 1.2rem; color: var(--ink-2); max-width: 36em; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 1.6em 0; }
.promise { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px 22px; color: var(--muted); font-size: .93rem; }
.promise li::before { content: "✓ "; color: var(--accent-dark); font-weight: 700; }
.hero-art svg { width: 100%; height: auto; }
.art-label { font: italic 600 17px var(--serif); fill: var(--ink-2); }
.arc { stroke-dasharray: 700; stroke-dashoffset: 700; animation: draw 2.2s ease-out .3s forwards; }
.dot { transform-origin: 370px 50px; animation: pop .5s ease-out 2.3s both; }
@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes pop { from { transform: scale(0); } 70% { transform: scale(1.25); } to { transform: scale(1); } }

/* Audiences */
.audiences { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: -10px; position: relative; }
.aud { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; text-decoration: none; color: var(--ink); transition: transform .15s, box-shadow .15s, border-color .15s; }
.aud:hover { transform: translateY(-3px); box-shadow: 0 10px 24px rgba(20,33,61,.08); border-color: var(--accent); }
.aud strong { display: block; font-family: var(--serif); font-size: 1.2rem; margin-bottom: 4px; }
.aud span { color: var(--muted); font-size: .93rem; }

/* Sections */
.section { padding: clamp(60px, 9vw, 110px) 0; }
.section-tint { background: var(--tint); }
.section-dark { background: var(--ink); color: #e8edf5; }
.section-dark h2, .section-dark h3 { color: #fff; }
.section-dark .eyebrow { color: var(--accent); }
.section-dark .section-lede, .section-dark p { color: #c4cee0; }
.section-dark a { color: var(--accent); }
.section-lede { font-size: 1.12rem; color: var(--ink-2); max-width: 46em; margin-bottom: 2.2em; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.step { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 28px; position: relative; }
.step-num { font: 700 2.4rem var(--serif); color: var(--accent); opacity: .5; position: absolute; top: 14px; right: 22px; }
.step ul { padding-left: 1.1em; margin: 0; color: var(--ink-2); }
.step li { margin-bottom: .45em; }
.callout { margin-top: 28px; display: grid; grid-template-columns: 1.4fr 1fr; gap: 24px; align-items: center; background: #fff4ea; border: 1px solid #f6d3b2; border-radius: var(--radius); padding: 26px 28px; }
.callout p { margin: 0; color: var(--ink-2); }
.callout-links { display: flex; flex-direction: column; gap: 10px; }
.callout-links a { font-weight: 600; }

/* Tabs & guides */
.tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.tabs button { font: 600 .98rem var(--sans); padding: .7em 1.2em; border-radius: 999px; border: 2px solid var(--line); background: #fff; color: var(--ink-2); cursor: pointer; }
.tabs button[aria-selected="true"] { background: var(--ink); color: #fff; border-color: var(--ink); }
.panel { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(22px, 4vw, 40px); }
.panel-head p { color: var(--muted); }
.quiz fieldset { border: 0; padding: 0; margin: 0 0 22px; }
.quiz legend { font-weight: 600; margin-bottom: 10px; }
.quiz label { display: inline-flex; align-items: center; gap: 8px; margin: 0 8px 8px 0; padding: .5em 1em; border: 1px solid var(--line); border-radius: 999px; cursor: pointer; font-size: .95rem; }
.quiz label:has(input:checked) { border-color: var(--accent-dark); background: #fff4ea; }
.quiz input { accent-color: var(--accent-dark); }
.result { margin-top: 24px; padding: 24px; border-radius: var(--radius); background: var(--tint); border-left: 5px solid var(--accent); }
.result h4 { font: 700 1.25rem var(--serif); margin: 0 0 .4em; }
.result ul { margin: .4em 0 0; padding-left: 1.1em; }
.meter { height: 10px; background: #dfe5ee; border-radius: 99px; overflow: hidden; margin: 10px 0 14px; }
.meter div { height: 100%; background: linear-gradient(90deg, var(--sky), var(--accent)); border-radius: 99px; transition: width .5s; }
.progress { height: 10px; background: var(--tint); border-radius: 99px; overflow: hidden; }
.progress div { height: 100%; width: 0; background: linear-gradient(90deg, var(--sky), var(--accent)); transition: width .35s; }
.plan-count { font-weight: 600; color: var(--ink-2); margin: 8px 0 18px; }
.plan { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-bottom: 20px; }
.week { border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; }
.week h4 { margin: 0 0 10px; font: 700 1.05rem var(--serif); }
.check { display: flex; gap: 10px; align-items: flex-start; padding: 6px 0; cursor: pointer; font-size: .95rem; }
.check input { margin-top: 5px; accent-color: var(--accent-dark); width: 17px; height: 17px; flex: none; }
.plan .check:has(input:checked) span { color: var(--muted); text-decoration: line-through; }
.checks { display: grid; grid-template-columns: repeat(2, 1fr); gap: 4px 28px; }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.card { background: #fff; border: 1px solid var(--line); border-top: 4px solid var(--accent); border-radius: var(--radius); padding: 24px; }
.card p { color: var(--ink-2); font-size: .96rem; margin: 0; }
.edu { margin-top: 44px; display: grid; grid-template-columns: 1.3fr 1fr; gap: 36px; align-items: center; padding: 34px; border-radius: var(--radius); background: var(--tint); }
.edu p { color: var(--ink-2); margin: 0; }
.tick-list { list-style: none; padding: 0; margin: 0 0 1em; }
.tick-list li { padding: 8px 0 8px 30px; position: relative; border-bottom: 1px solid var(--line); }
.tick-list li:last-child { border-bottom: 0; }
.tick-list li::before { content: ""; position: absolute; left: 4px; top: 15px; width: 12px; height: 7px; border-left: 3px solid var(--accent-dark); border-bottom: 3px solid var(--accent-dark); transform: rotate(-45deg); }

/* Research */
.research-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.topic { background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.12); border-radius: var(--radius); padding: 24px; transition: background .15s; }
.topic:hover { background: rgba(255,255,255,.09); }
.topic p { font-size: .95rem; margin: 0; }
.tag { display: inline-block; font-size: .72rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--ink); background: var(--accent); border-radius: 99px; padding: 3px 10px; margin-bottom: 12px; }
.note { margin-top: 28px; }

/* Responsible Cloud */
.rc-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 48px; align-items: center; }
.rc p { color: var(--ink-2); }
.rc-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.rc-list li { background: #fff; border: 1px solid var(--line); border-left: 5px solid var(--ink); border-radius: 10px; padding: 14px 18px; color: var(--ink-2); }
.rc-list strong { color: var(--ink); }

/* Partner form */
.partner-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.partner-grid > div > p { color: var(--ink-2); }
.form { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; box-shadow: 0 14px 34px rgba(20,33,61,.07); }
.form label { display: block; font-weight: 600; font-size: .92rem; margin-bottom: 14px; }
.form input, .form select, .form textarea { display: block; width: 100%; margin-top: 6px; padding: .7em .85em; font: 1rem var(--sans); border: 1px solid #c7d0de; border-radius: 10px; background: #fff; color: var(--ink); }
.form input:focus, .form select:focus, .form textarea:focus { outline: none; border-color: var(--accent-dark); box-shadow: 0 0 0 3px rgba(242,153,74,.25); }
.form .btn { width: 100%; }
.form-note { margin-top: 10px; }
.form-status { font-weight: 600; color: var(--accent-dark); margin: 0; min-height: 1.4em; }

/* Footer */
.site-footer { background: #0e1830; color: #b8c3d6; padding: 56px 0 26px; }
.site-footer .brand, .site-footer .brand-mark { color: #fff; }
.foot-grid { display: grid; grid-template-columns: 1fr 1fr 1.4fr; gap: 32px; }
.site-footer nav { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.site-footer nav a { color: #d6deea; text-decoration: none; }
.site-footer nav a:hover { color: var(--accent); }
.site-footer .small { color: #8e9bb3; }
.copy { border-top: 1px solid rgba(255,255,255,.1); margin-top: 32px; padding-top: 20px; }


/* ===== Sponsorship ===== */
.hero-sponsor { margin-top: 1.4em; font-size: .95rem; color: var(--ink-2); }
.hero-sponsor a { font-weight: 600; }
.aud-sponsor { border-color: #f6d3b2; background: #fff8f1; }
.sponsor-slot { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 18px; border: 2px dashed #e8c3a0; border-radius: 12px; padding: 12px 18px; margin-bottom: 16px; background: #fffaf5; font-size: .93rem; }
.sponsor-slot p { margin: 0; color: var(--ink-2); flex: 1 1 320px; }
.sponsor-slot a { font-weight: 600; white-space: nowrap; }
.slot-label { font-size: .72rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--accent-dark); }
.about-grid { display: grid; grid-template-columns: .8fr 1.4fr; gap: 48px; align-items: center; }
.about-grid p { color: var(--ink-2); }
.about-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; box-shadow: 0 14px 34px rgba(20,33,61,.07); }
.avatar { width: 64px; height: 64px; border-radius: 50%; background: var(--ink); color: #fff; display: grid; place-items: center; font: 700 1.3rem var(--serif); margin-bottom: 16px; }
.creds { list-style: none; padding: 0; margin: 14px 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
.creds li { font-size: .82rem; font-weight: 600; background: var(--tint); border-radius: 99px; padding: 4px 12px; color: var(--ink-2); }
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-bottom: 36px; }
.why { border-left: 4px solid var(--accent); padding: 4px 0 4px 18px; }
.why p { color: var(--ink-2); margin: 0; font-size: .96rem; }
.tiers { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; align-items: stretch; margin-bottom: 14px; }
.tier { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 22px; display: flex; flex-direction: column; position: relative; }
.tier ul { padding-left: 1.1em; margin: 0 0 20px; color: var(--ink-2); font-size: .93rem; flex: 1; }
.tier li { margin-bottom: .4em; }
.tier .btn { align-self: flex-start; }
.tier.featured { border: 2px solid var(--accent-dark); box-shadow: 0 16px 36px rgba(201,106,27,.15); }
.ribbon { position: absolute; top: -12px; left: 22px; background: var(--accent-dark); color: #fff; font-size: .72rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; padding: 4px 10px; border-radius: 99px; }
.price { font: 700 2rem var(--serif); margin: 0 0 14px; }
.per { font-size: .85rem; color: var(--muted); margin: -10px 0 14px; }
.founding-note { background: #fff8f1; border: 1px solid #f6d3b2; border-radius: 12px; padding: 14px 18px; color: var(--ink-2); margin-bottom: 22px; }
.price span { font: 500 .9rem var(--sans); color: var(--muted); margin-left: 4px; }
.center { text-align: center; }
#partner .partner-grid { margin-top: 48px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 980px) {
  .tiers, .stats { grid-template-columns: repeat(2, 1fr); }
  .readwell { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .tiers, .why-grid, .form-row { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stat-num { font-size: 1.6rem; }
  .readwell { grid-template-columns: 1fr; padding: 22px; }
  .chart-card { padding: 18px 14px 14px; }
  .tier.featured { margin-top: 8px; }
}


/* ===== What's happening + chart ===== */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 24px; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; }
.stat-num { font: 700 2.1rem var(--serif); color: var(--ink); margin: 0 0 4px; letter-spacing: -.02em; }
.stat p:last-child { color: var(--ink-2); font-size: .93rem; margin: 0; }
.chart-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 26px 18px; }
.chart-card h3 { font-size: 1.1rem; }
.chart-src { margin: 10px 0 0; }
.c-wrap { position: relative; }
.c-wrap svg { width: 100%; height: auto; display: block; overflow: visible; }
.c-grid { stroke: #e7ebf2; stroke-width: 1; }
.c-base { stroke: #b9c3d3; }
.c-axis { font: 12px var(--sans); fill: var(--muted); }
.c-label { font: 600 12px var(--sans); fill: var(--ink); }
.c-mark { fill: var(--accent-dark); transition: opacity .15s; }
.c-hit { fill: transparent; }
.c-bar { cursor: pointer; outline: none; }
.c-bar.dim .c-mark { opacity: .35; }
.c-bar:focus-visible .c-mark { stroke: var(--ink); stroke-width: 2; }
.c-tip { position: absolute; transform: translate(-50%, -100%); background: var(--ink); color: #fff; font-size: .82rem; line-height: 1.35; padding: 6px 10px; border-radius: 8px; pointer-events: none; white-space: nowrap; }
.c-table { margin-top: 8px; font-size: .9rem; }
.c-table summary { cursor: pointer; color: var(--accent-dark); font-weight: 600; }
.c-table table { border-collapse: collapse; margin-top: 8px; }
.c-table th, .c-table td { text-align: left; padding: 4px 18px 4px 0; border-bottom: 1px solid var(--line); }
.c-table td:last-child { font-variant-numeric: tabular-nums; }
.readwell { margin-top: 24px; display: grid; grid-template-columns: 1fr auto; gap: 28px; align-items: center; background: var(--tint); border-radius: var(--radius); padding: 26px 28px; }
.readwell p { margin: 0; color: var(--ink-2); }
.brief-feature { display: block; text-decoration: none; background: rgba(255,255,255,.08); border: 1px solid var(--accent); border-radius: var(--radius); padding: 26px 28px; margin-bottom: 18px; transition: background .15s; }
.brief-feature:hover { background: rgba(255,255,255,.13); }
.brief-feature h3 { color: #fff; font-size: 1.45rem; }
.brief-feature p { margin: 0; }

/* ===== Article pages ===== */
.article { max-width: 720px; margin-inline: auto; padding: clamp(40px, 7vw, 80px) 20px; }
.article h1 { font-size: clamp(2rem, 4.6vw, 2.9rem); }
.article h2 { font-size: 1.6rem; margin-top: 1.8em; }
.article p, .article li { font-size: 1.07rem; color: var(--ink-2); }
.article li { margin-bottom: .5em; }
.byline { color: var(--muted); font-size: .92rem; border-bottom: 1px solid var(--line); padding-bottom: 18px; margin-bottom: 28px; }
.keypoints { background: var(--tint); border-radius: var(--radius); padding: 22px 26px; margin: 0 0 28px; }
.keypoints h2 { margin: 0 0 10px; font-size: 1.15rem; }
.keypoints ul { margin: 0; padding-left: 1.1em; }
.article .chart-card { margin: 26px 0; }
.sources { font-size: .92rem; }
.sources li { font-size: .92rem; }
.back { display: inline-block; margin-bottom: 18px; font-weight: 600; text-decoration: none; }

/* Responsive */
@media (max-width: 980px) {
  .hero-grid, .rc-grid, .partner-grid, .edu, .callout { grid-template-columns: 1fr; }
  .hero-art { max-width: 420px; }
  .audiences, .cards { grid-template-columns: repeat(2, 1fr); }
  .research-grid { grid-template-columns: repeat(2, 1fr); }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .foot-grid .disclaimer { grid-column: 1 / -1; }
}
@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .nav-links { position: absolute; top: 66px; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; background: var(--paper); border-bottom: 1px solid var(--line); padding: 8px 20px 18px; display: none; }
  .nav-links.open { display: flex; }
  .nav-links a:not(.btn) { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .nav-links .btn { margin-top: 14px; text-align: center; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .steps, .plan, .checks, .research-grid, .cards, .audiences, .foot-grid { grid-template-columns: 1fr; }
  .hero-art { display: none; }
  .tabs button { flex: 1 1 100%; }
  body { font-size: 16px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .arc { animation: none; stroke-dashoffset: 0; }
  .dot { animation: none; }
  * { transition: none !important; }
}
@media print {
  .site-header, .hero-art, .tabs, #partner, .site-footer nav { display: none; }
  .panel[hidden] { display: block !important; }
}

/* Responsive overrides for stats/chart/readwell (must come after base rules) */
@media (max-width: 980px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  .readwell { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .stat-num { font-size: 1.6rem; }
  .readwell { padding: 22px; }
  .chart-card { padding: 18px 14px 14px; }
}