/* sample_size_calculator — tool-specific design (graph-paper worksheet + result board). Shared: nav, footer, sidebars, ad script only. */
body[data-tool="sample_size_calculator"] {
  --ss-bg: #F4F6FA; --ss-grid: #E2E7F0; --ss-card: #FFFFFF; --ss-ink: #14213D; --ss-ink2: #48526A; --ss-mute: #7B859B; --ss-line: #D9E0EC;
  --ss-board: #14213D; --ss-board2: #22325A; --ss-acc: #F25F3A; --ss-acc2: #FFB59E;
  --ss-head: "Space Grotesk", Inter, system-ui, sans-serif; --ss-sans: Inter, system-ui, -apple-system, "Segoe UI", sans-serif; --ss-mono: "JetBrains Mono", ui-monospace, Menlo, monospace;
  background-color: var(--ss-bg); color: var(--ss-ink); font-family: var(--ss-sans);
  background-image: linear-gradient(var(--ss-grid) 1px, transparent 1px), linear-gradient(90deg, var(--ss-grid) 1px, transparent 1px); background-size: 28px 28px;
}
body[data-tool="sample_size_calculator"] .dt-nav { background: rgba(244,246,250,.92); border-bottom: 1px solid var(--ss-line); }
body[data-tool="sample_size_calculator"] .dt-nav .navbar-brand { color: var(--ss-ink); }
body[data-tool="sample_size_calculator"] .dt-footer { background: var(--ss-bg); }
.dt-bare { display: block; width: 100%; flex: 1; }
.ssx { max-width: 1080px; margin: 0 auto; padding: 36px 20px 64px; }
.ss-hero h1 { font-family: var(--ss-head); font-size: 46px; line-height: 1.08; font-weight: 700; letter-spacing: -.03em; margin: 0; }
.ss-hero p { margin: 12px 0 0; font-size: 18px; color: var(--ss-ink2); max-width: 58ch; }

.ss { display: grid; grid-template-columns: minmax(0, 420px) minmax(0, 1fr); gap: 0; margin-top: 28px; border-radius: 14px; overflow: hidden; box-shadow: 0 1px 2px rgba(20,33,61,.08), 0 18px 40px rgba(20,33,61,.12); }
.ss-in { background: var(--ss-card); padding: 26px 26px 22px; display: flex; flex-direction: column; gap: 18px; }
.ss-f { display: flex; flex-direction: column; gap: 7px; }
.ss-l { font-family: var(--ss-mono); font-size: 11px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--ss-mute); }
.ss-seg { display: flex; background: var(--ss-bg); border: 1px solid var(--ss-line); border-radius: 10px; padding: 3px; gap: 3px; }
.ss-seg button { flex: 1; border: 0; border-radius: 7px; background: transparent; font-family: var(--ss-sans); font-size: 14px; font-weight: 600; color: var(--ss-ink2); padding: 8px 10px; cursor: pointer; }
.ss-seg button[aria-pressed="true"] { background: var(--ss-ink); color: #fff; }
.ss-seg button:focus-visible { outline: 2px solid var(--ss-acc); outline-offset: 1px; }
.ss-moe { display: flex; align-items: center; gap: 8px; }
.ss-moe input[type="range"] { flex: 1; accent-color: var(--ss-acc); }
.ss-moe input[type="number"] { width: 64px; }
.ss-box { display: flex; align-items: center; gap: 6px; border: 1px solid var(--ss-line); border-radius: 10px; padding: 0 12px; background: #fff; }
.ss-box:focus-within, .ss-moe input[type="number"]:focus { border-color: var(--ss-ink); box-shadow: 0 0 0 3px rgba(20,33,61,.1); }
.ss-in input[type="number"] { border: 0; background: transparent; font-family: var(--ss-mono); font-size: 16px; font-weight: 500; color: var(--ss-ink); padding: 10px 0; width: 100%; -moz-appearance: textfield; outline: none; }
.ss-in .ss-moe input[type="number"] { width: 76px; flex: none; border: 1px solid var(--ss-line); border-radius: 10px; padding: 9px 10px; text-align: right; }
.ss-in input::-webkit-outer-spin-button, .ss-in input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.ss-in input::placeholder { color: #A9B1C2; }
.ss-unit { font-family: var(--ss-mono); font-size: 14px; color: var(--ss-mute); }
body[data-mode="mean"] .only-prop, body:not([data-mode="mean"]) .only-mean { display: none; }

.ss-out { background: var(--ss-board); color: #fff; padding: 28px 30px 24px; display: flex; flex-direction: column; }
.ss-big { font-family: var(--ss-head); font-size: 92px; line-height: 1; font-weight: 700; letter-spacing: -.03em; font-variant-numeric: tabular-nums; }
.ss-bigsub { margin-top: 8px; font-size: 16px; color: #C3CBE0; }
.ss-invite { margin-top: 10px; min-height: 22px; font-size: 15px; color: var(--ss-acc2); }
.ss-invite b { color: #fff; font-family: var(--ss-mono); }
.ss-cap { margin-top: 18px; font-family: var(--ss-mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: #8E9AB8; }
.ss-chart { margin-top: 6px; }
.ss-chart svg { width: 100%; height: auto; display: block; font-family: var(--ss-mono); font-size: 11px; }
.ss-chart text { fill: #9AA6C2; }
.ss-chart .g { stroke: var(--ss-board2); stroke-width: 1; }
.ss-chart .c { fill: none; stroke: #8FB3FF; stroke-width: 2.5; }
.ss-chart .m { stroke: var(--ss-acc); stroke-width: 1.5; stroke-dasharray: 4 4; }
.ss-chart .d { fill: var(--ss-acc); stroke: #fff; stroke-width: 2; }
.ss-work { margin-top: auto; padding-top: 18px; border-top: 1px solid var(--ss-board2); }
.ss-work .ss-l { color: #8E9AB8; }
.ss-work p { margin: 8px 0 0; font-family: var(--ss-mono); font-size: 13px; line-height: 1.8; color: #DCE2F0; overflow-wrap: anywhere; }
.ss-work b { color: var(--ss-acc2); }

.ss-adwrap { margin: 44px 0 8px; }
.ss-article, .ss-faq, .ss-more { max-width: 720px; margin: 0 auto; }
.ss-article { margin-top: 48px; background: rgba(255,255,255,.88); border: 1px solid var(--ss-line); border-radius: 14px; padding: 34px 38px; font-size: 17px; line-height: 1.75; color: var(--ss-ink2); }
.ss-article h2, .ss-faq h2, .ss-more h2 { font-family: var(--ss-head); font-size: 27px; line-height: 1.25; font-weight: 700; letter-spacing: -.02em; color: var(--ss-ink); margin: 48px 0 12px; }
.ss-article h2:first-child { margin-top: 0; }
.ss-article p { margin: 0 0 14px; }
.ss-article b { color: var(--ss-ink); }
.ss-article a { color: var(--ss-ink); }
.ss-eq { font-family: var(--ss-mono); font-size: 15px; background: var(--ss-bg); border-left: 3px solid var(--ss-acc); padding: 10px 14px; border-radius: 4px; color: var(--ss-ink); overflow-x: auto; }
.ss-table { overflow-x: auto; margin: 16px 0 22px; }
.ss-table table { width: 100%; border-collapse: collapse; font-family: var(--ss-mono); font-size: 14px; }
.ss-table th { font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--ss-mute); text-align: right; padding: 8px 10px; border-bottom: 2px solid var(--ss-ink); }
.ss-table td { text-align: right; padding: 8px 10px; border-bottom: 1px solid var(--ss-line); color: var(--ss-ink); }
.ss-table th:first-child, .ss-table td:first-child { text-align: left; }
.ss-narrow { max-width: 320px; }
.ss-src { font-size: 15px; padding-left: 1.2em; }
.ss-faq { margin-top: 8px; }
.ss-q { border-bottom: 1px solid var(--ss-line); background: rgba(244,246,250,.9); }
.ss-q summary { list-style: none; cursor: pointer; padding: 16px 32px 16px 0; position: relative; font-size: 18px; font-weight: 600; }
.ss-q summary::-webkit-details-marker { display: none; }
.ss-q summary::after { content: "+"; position: absolute; right: 4px; top: 12px; font-family: var(--ss-mono); font-size: 22px; color: var(--ss-mute); }
.ss-q[open] summary::after { content: "\2212"; }
.ss-q p { margin: 0 0 18px; font-size: 17px; line-height: 1.7; color: var(--ss-ink2); }
.ss-more > div { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.ss-more a { display: block; text-decoration: none; padding: 14px 16px; border: 1px solid var(--ss-line); border-radius: 10px; background: #fff; color: var(--ss-ink); }
.ss-more a:hover { border-color: var(--ss-ink); }
.ss-more b { display: block; font-size: 15px; }
.ss-more span { display: block; font-size: 13px; color: var(--ss-mute); margin-top: 2px; }

@media (max-width: 820px) {
  .ss { grid-template-columns: minmax(0, 1fr); }
  .ss-big { font-size: 76px; }
}
@media (max-width: 640px) {
  .ssx { padding: 24px 14px 48px; }
  .ss-hero h1 { font-size: 34px; }
  .ss-hero p { font-size: 16px; }
  .ss-in { padding: 20px 16px; }
  .ss-out { padding: 22px 18px; }
  .ss-article { padding: 22px 18px; font-size: 16px; }
  .ss-article h2, .ss-faq h2, .ss-more h2 { font-size: 23px; margin-top: 40px; }
  .ss-more > div { grid-template-columns: minmax(0, 1fr); }
}