/* ============================================================
   /open-source (internal/pages/opensource): a centred hero over a closed
   code window, why the code is not public yet (cards), a dark panel on why
   open code or federation is not safety on its own, how mssgs earns trust
   instead, the later plan, a FAQ and a closing panel. Scoped under .os-.
   ============================================================ */

/* ---- Hero ---- */
.os-hero{padding:140px 0 10px;text-align:center}
.os-eyebrow{display:inline-flex;align-items:center;gap:8px;margin:0;padding:7px 14px;border-radius:980px;background:rgba(51,117,77,.1);color:var(--green-700);font-size:13.5px;font-weight:700}
.os-eyebrow i{font-size:12px}
.os-hero h1{font-size:clamp(40px,5.6vw,72px);line-height:1.02;margin:18px auto 18px;max-width:900px;color:var(--w-ink)}
.os-sub{font-size:18px;line-height:1.6;color:var(--w-mut);margin:0 auto 30px;max-width:680px}
.os-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:12px}
.os-actions .btn-f{gap:10px}
.os-hero .btn-f-primary{box-shadow:var(--shadow-glow)}

/* The closed repository: a dark editor window whose lines are blurred bars,
   with a lock over them. Decorative, so it carries no words but the badge. */
.os-repo{position:relative;max-width:560px;margin:56px auto 0;border-radius:18px;background:#1e1f23;box-shadow:0 34px 70px -28px rgba(20,26,22,.6),0 0 0 1px rgba(255,255,255,.06) inset;overflow:hidden;text-align:left}
.os-repo-bar{display:flex;align-items:center;gap:6px;padding:11px 14px;background:#26272c;border-bottom:1px solid #313238}
.os-repo-bar span{width:10px;height:10px;border-radius:50%;background:#ff5f57}
.os-repo-bar span:nth-child(2){background:#febc2e}
.os-repo-bar span:nth-child(3){background:#28c840}
.os-repo-bar b{display:inline-flex;align-items:center;gap:7px;margin-left:10px;font-size:12.5px;font-weight:600;color:#b5bac1}
.os-repo-bar b i{font-size:11px;color:#7fd3a0}
.os-repo-code{display:flex;flex-direction:column;gap:11px;padding:24px 26px 30px;filter:blur(3px);opacity:.85}
.os-repo-code i{display:block;height:10px;border-radius:5px;background:#c9cbd0;width:50%}
.os-repo-code i:nth-child(1){width:38%;background:#7fd3a0}
.os-repo-code i:nth-child(2){width:62%;background:#9fb7ff;margin-left:6%}
.os-repo-code i:nth-child(3){width:48%;background:#e6c07b;margin-left:12%}
.os-repo-code i:nth-child(4){width:70%;margin-left:12%}
.os-repo-code i:nth-child(5){width:34%;background:#ff9b8a;margin-left:6%}
.os-repo-code i:nth-child(6){width:56%;background:#7fd3a0}
.os-repo-code i:nth-child(7){width:44%;background:#9fb7ff;margin-left:6%}
.os-repo-code i:nth-child(8){width:66%;margin-left:12%}
.os-repo-code i:nth-child(9){width:28%;background:#e6c07b;margin-left:6%}
.os-repo-lock{position:absolute;left:50%;top:58%;transform:translate(-50%,-50%);display:inline-flex;align-items:center;gap:10px;max-width:calc(100% - 32px);padding:10px 18px 10px 10px;border-radius:980px;background:rgba(40,40,48,.72);border:1px solid rgba(255,255,255,.14);box-shadow:0 10px 30px rgba(0,0,0,.35);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);color:#fff;font-size:14.5px;font-weight:700;line-height:1.3}
.os-repo-lock span{flex:none;display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:#3f7f58;font-size:13px}

/* ---- Sections ---- */
.os-sec{padding:100px 0 0;scroll-margin-top:90px}
.os-head{max-width:760px;margin:0 0 32px}
.os-head-center{text-align:center;margin-left:auto;margin-right:auto}
.os-head .eyebrow-d{margin:0}
.os-head h2{font-size:clamp(30px,3.6vw,44px);line-height:1.06;margin:6px 0 12px;color:var(--w-ink)}
.os-lead{font-size:17px;line-height:1.6;color:var(--w-mut);margin:0}
.os-lead a,.os-card a,.os-qa a,.os-later a,.os-note a,.os-end-panel p a{color:var(--green-700);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:2px}

.os-cards{display:grid;gap:16px}
.os-cards-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.os-cards-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.os-card{display:flex;flex-direction:column;gap:8px;padding:22px 22px 24px;border-radius:20px;background:var(--bg-card);border:1px solid var(--w-line);box-shadow:var(--shadow-sm);transition:box-shadow var(--dur-slow) var(--ease-standard),transform var(--dur-slow) var(--ease-standard)}
.os-card:hover{box-shadow:rgba(31,35,33,.09) 0 12px 30px;transform:translateY(-2px)}
.os-card-icon{display:grid;place-items:center;width:40px;height:40px;margin-bottom:6px;border-radius:12px;background:rgba(51,117,77,.11);color:var(--green-600);font-size:16px}
.os-card h3{margin:0;font-size:17px;font-weight:700;line-height:1.3;color:var(--w-ink)}
.os-card p{margin:0;font-size:15px;line-height:1.6;color:var(--w-mut)}

.os-note{display:flex;align-items:flex-start;gap:12px;max-width:820px;margin:24px 0 0;padding:16px 18px;border-radius:16px;border:1px solid rgba(51,117,77,.16);background:rgba(51,117,77,.06);font-size:16px;line-height:1.6;color:var(--w-ink2)}
.os-note i{flex:none;margin-top:5px;font-size:13px;color:var(--green-600)}

/* ---- Open is not safe: the dark panel ---- */
.os-myth-panel{padding:52px 48px;border-radius:28px;background:radial-gradient(circle at 12% 0%,rgba(111,211,155,.2),transparent 50%),radial-gradient(circle at 100% 100%,rgba(176,141,87,.16),transparent 45%),#202327;color:#fff;box-shadow:0 22px 50px rgba(20,32,24,.2)}
.os-myth-eyebrow{margin:0;font-size:12.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:#7fd3a0}
.os-myth-panel .os-head h2{color:#fff}
.os-myth-panel .os-lead{color:rgba(255,255,255,.76)}
.os-myth-panel .os-card{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.1);box-shadow:none}
.os-myth-panel .os-card:hover{transform:none;box-shadow:none}
.os-myth-panel .os-card-icon{background:rgba(111,211,155,.14);color:#7fd3a0}
.os-myth-panel .os-card h3{color:#fff}
.os-myth-panel .os-card p{color:rgba(255,255,255,.74)}
.os-myth-end{margin:28px 0 0;max-width:760px;font-size:18px;line-height:1.55;font-weight:600;color:#e9f6ee}

.os-more{margin:18px 0 0;text-align:right}
.os-more a{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--green-700);text-decoration:underline;text-underline-offset:3px}
.os-more i{font-size:12px}

/* ---- Later ---- */
.os-later{display:flex;align-items:flex-start;gap:26px;padding:44px 48px;border-radius:28px;background:linear-gradient(145deg,rgba(111,211,155,.22),rgba(51,117,77,.08));border:1px solid rgba(51,117,77,.18)}
.os-later-icon{flex:none;display:grid;place-items:center;width:60px;height:60px;border-radius:18px;background:linear-gradient(145deg,var(--green-500),var(--green-700));color:var(--brand-contrast);font-size:24px;box-shadow:0 10px 22px rgba(38,95,62,.25)}
.os-later-eyebrow{margin:0;font-size:12.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--green-700)}
.os-later h2{font-size:clamp(28px,3.4vw,40px);line-height:1.08;margin:6px 0 14px;color:var(--w-ink)}
.os-later p{margin:0 0 12px;max-width:760px;font-size:17px;line-height:1.65;color:var(--w-ink2)}
.os-later p:last-child{margin-bottom:0}

/* ---- FAQ ---- */
.os-qas{display:flex;flex-direction:column;gap:10px;max-width:820px;margin:0 auto}
.os-qa{border-radius:16px;background:var(--bg-card);border:1px solid var(--w-line);box-shadow:var(--shadow-sm);transition:border-color var(--dur-base) var(--ease-standard)}
.os-qa[open]{border-color:var(--green-200)}
.os-qa summary{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 22px;cursor:pointer;list-style:none;font-size:16px;font-weight:600;line-height:1.4;color:var(--w-ink)}
.os-qa summary::-webkit-details-marker{display:none}
.os-qa summary h3{margin:0;font:inherit;color:inherit}
.os-qa summary i{flex:none;font-size:13px;color:var(--green-600);transition:transform var(--dur-base) var(--ease-standard)}
.os-qa[open] summary i{transform:rotate(180deg)}
.os-qa summary:focus-visible{outline:none;border-radius:16px;box-shadow:0 0 0 3px var(--w-focus)}
.os-qa p{margin:0;padding:0 22px 20px;font-size:15px;line-height:1.65;color:var(--w-mut)}

/* ---- Closing panel ---- */
.os-end{padding:90px 0 100px}
.glass-tile.os-end-panel{text-align:center;padding:60px 40px}
.os-end-panel h2{font-size:clamp(30px,3.8vw,46px);line-height:1.06;margin:0 0 12px;color:var(--w-ink)}
.os-end-panel p{font-size:17px;line-height:1.6;color:var(--w-mut);max-width:600px;margin:0 auto 26px}

/* ---- Narrower screens ---- */
@media (max-width:980px){
  .os-hero{padding-top:120px}
  .os-sec{padding-top:80px}
  .os-cards-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .os-myth-panel{padding:40px 30px}
  .os-later{padding:36px 30px}
}
@media (max-width:640px){
  .os-hero{padding-top:104px}
  .os-sub{font-size:16.5px}
  .os-actions .btn-f{flex:1 1 100%;justify-content:center}
  .os-repo{margin-top:40px;border-radius:16px}
  .os-repo-code{padding:20px 18px 24px;gap:10px}
  .os-repo-lock{font-size:13.5px}
  .os-sec{padding-top:64px}
  .os-lead{font-size:16px}
  .os-cards-2,.os-cards-3{grid-template-columns:minmax(0,1fr);gap:12px}
  /* On a phone the icon sits beside the title, which saves a line per card */
  .os-card{display:grid;grid-template-columns:36px minmax(0,1fr);align-items:center;column-gap:12px;row-gap:8px;padding:18px 18px 20px}
  .os-card-icon{width:36px;height:36px;margin:0;border-radius:10px;font-size:14px}
  .os-card p{grid-column:1/-1}
  .os-note{font-size:15px}
  .os-myth-panel{padding:30px 20px;border-radius:22px}
  .os-myth-end{font-size:16.5px}
  .os-more{text-align:left}
  .os-later{flex-direction:column;gap:16px;padding:28px 22px;border-radius:22px}
  .os-later-icon{width:48px;height:48px;border-radius:14px;font-size:19px}
  .os-later p{font-size:16px}
  .os-qa summary{padding:16px 18px;font-size:15.5px}
  .os-qa p{padding:0 18px 18px}
  .glass-tile.os-end-panel{padding:40px 22px}
  .os-end{padding-bottom:70px}
}
@media (prefers-reduced-motion:reduce){
  .os-card,.os-qa summary i{transition:none}
  .os-card:hover{transform:none}
}