.fss-calc {
	--fss-navy: #0b1b33;
	--fss-blue: #17375e;
	--fss-gold: #c8a24c;
	--fss-cream: #faf8f2;
	--fss-line: #e7dfcf;
	position: relative;
	isolation: isolate;
	max-width: 1240px;
	margin: 40px auto;
	padding: clamp(28px, 5vw, 68px);
	overflow: hidden;
	color: var(--fss-navy);
	background: linear-gradient(145deg, #fff 0%, var(--fss-cream) 65%, #f4efe4 100%);
	border: 1px solid rgba(200, 162, 76, .28);
	border-radius: 32px;
	box-shadow: 0 30px 80px rgba(11, 27, 51, .12), inset 0 1px 0 #fff;
	font-family: Inter, Manrope, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.fss-calc * { box-sizing: border-box; }

.fss-calc__aura {
	position: absolute;
	z-index: -1;
	top: -220px;
	right: -170px;
	width: 520px;
	height: 520px;
	border-radius: 50%;
	background: radial-gradient(circle, rgba(200, 162, 76, .19), rgba(200, 162, 76, 0) 70%);
}

.fss-calc__header { max-width: 760px; margin-bottom: 36px; }
.fss-calc__eyebrow {
	display: inline-flex;
	align-items: center;
	gap: 9px;
	margin-bottom: 12px;
	color: #8a681d;
	font-size: 12px;
	font-weight: 800;
	letter-spacing: .18em;
	text-transform: uppercase;
}
.fss-calc__eyebrow::before { content: ""; width: 30px; height: 1px; background: var(--fss-gold); }
.fss-calc__header h2 {
	margin: 0;
	font-family: Georgia, "Times New Roman", serif;
	font-size: clamp(38px, 5vw, 64px);
	font-weight: 600;
	line-height: .98;
	letter-spacing: -.035em;
}
.fss-calc__header p { max-width: 640px; margin: 18px 0 0; color: #536177; font-size: 17px; line-height: 1.65; }

.fss-calc__steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.fss-calc__card {
	min-width: 0;
	margin: 0;
	padding: 24px;
	background: rgba(255, 255, 255, .82);
	border: 1px solid var(--fss-line);
	border-radius: 22px;
	box-shadow: 0 12px 30px rgba(11, 27, 51, .055);
}
.fss-calc__card-title {
	display: flex;
	align-items: center;
	gap: 11px;
	color: var(--fss-navy);
	position: relative;
}
.fss-calc__card-title h3 {
	margin: 0;
	font-family: Georgia, "Times New Roman", serif;
	font-size: 21px;
	font-weight: 700;
	line-height: 1.18;
}
.fss-calc__card-title span {
	display: inline-grid;
	place-items: center;
	flex: 0 0 34px;
	height: 34px;
	color: #fff;
	background: var(--fss-navy);
	border: 1px solid rgba(200, 162, 76, .7);
	border-radius: 50%;
	font-family: Inter, sans-serif;
	font-size: 10px;
	letter-spacing: .08em;
}
.fss-calc__hint { min-height: 42px; margin: 12px 0 17px; color: #6e7888; font-size: 13px; line-height: 1.5; }
.fss-calc__choices { display: flex; flex-wrap: wrap; gap: 8px; }
.fss-calc__choices button {
	min-width: 62px;
	min-height: 42px;
	padding: 9px 13px;
	color: var(--fss-navy) !important;
	background: #fff !important;
	border: 1px solid #d8d1c5 !important;
	border-radius: 999px;
	box-shadow: none;
	cursor: pointer;
	font: 700 13px/1 Inter, sans-serif;
	transition: transform .16s ease, color .16s ease, background .16s ease, border-color .16s ease, box-shadow .16s ease;
}
.fss-calc__choices button:hover { transform: translateY(-1px); border-color: var(--fss-gold) !important; }
.fss-calc__choices button:focus-visible { outline: 3px solid rgba(200, 162, 76, .35); outline-offset: 2px; }
.fss-calc__choices button.is-selected {
	color: #fff !important;
	background: linear-gradient(135deg, var(--fss-navy), var(--fss-blue)) !important;
	border-color: var(--fss-navy) !important;
	box-shadow: 0 8px 18px rgba(11, 27, 51, .18);
}

.fss-calc__input { display: block; margin-top: 20px; color: #4d586b; font-size: 11px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.fss-calc__input-wrap {
	display: flex;
	align-items: center;
	margin-top: 7px;
	background: #fff;
	border: 1px solid #d8d1c5;
	border-radius: 14px;
	transition: border-color .16s ease, box-shadow .16s ease;
}
.fss-calc__input-wrap:focus-within { border-color: var(--fss-gold); box-shadow: 0 0 0 3px rgba(200, 162, 76, .16); }
.fss-calc__input input {
	width: 100%;
	min-width: 0;
	height: 48px;
	padding: 0 6px 0 14px;
	color: var(--fss-navy);
	background: transparent;
	border: 0;
	box-shadow: none;
	font: 700 16px/1 Inter, sans-serif;
}
.fss-calc__input input:focus { outline: 0; }
.fss-calc__input-wrap b { padding: 0 14px 0 6px; color: #8a681d; font-size: 12px; }
.fss-calc__input-wrap--unit input { padding-right: 10px; }
.fss-calc__unit-toggle { display: flex; flex: 0 0 auto; gap: 3px; margin-right: 5px; padding: 3px; background: #f1ede4; border-radius: 10px; }
.fss-calc__unit-toggle button {
	min-width: 44px;
	min-height: 34px;
	padding: 6px 8px;
	color: #5d6879 !important;
	background: transparent !important;
	border: 0 !important;
	border-radius: 8px;
	box-shadow: none !important;
	cursor: pointer;
	font: 800 11px/1 Inter, sans-serif;
}
.fss-calc__unit-toggle button.is-selected { color: #fff !important; background: var(--fss-navy) !important; }
.fss-calc__unit-toggle button:focus-visible { outline: 2px solid var(--fss-gold); outline-offset: 1px; }

.fss-calc__result {
	display: grid;
	grid-template-columns: minmax(240px, .9fr) minmax(300px, 1.1fr);
	gap: 24px 40px;
	align-items: center;
	margin-top: 22px;
	padding: clamp(26px, 4vw, 42px);
	color: #fff;
	background: radial-gradient(circle at 90% 10%, rgba(200, 162, 76, .23), transparent 36%), linear-gradient(135deg, #08172c, #102b4d);
	border: 1px solid rgba(200, 162, 76, .52);
	border-radius: 24px;
	box-shadow: 0 22px 48px rgba(11, 27, 51, .2);
}
.fss-calc__result-label { display: block; color: #e4c879; font-size: 11px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.fss-calc__result output { display: block; margin-top: 6px; font-family: Georgia, serif; font-size: clamp(42px, 6vw, 70px); line-height: 1; letter-spacing: -.04em; }
.fss-calc__result-copy p { margin: 10px 0 0; color: #cdd5df; font-size: 15px; }
.fss-calc__metrics { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.fss-calc__metrics div { padding: 16px 18px; background: rgba(255, 255, 255, .075); border: 1px solid rgba(255, 255, 255, .13); border-radius: 15px; }
.fss-calc__metrics span { display: block; color: #aebacc; font-size: 10px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.fss-calc__metrics strong { display: block; margin-top: 5px; font-family: Georgia, serif; font-size: 21px; }
.fss-calc__syringe {
	display: grid;
	grid-template-columns: 70px minmax(260px, 1fr) 78px;
	grid-template-rows: 94px auto;
	align-items: center;
	grid-column: 1 / -1;
	margin-top: 4px;
}
.fss-calc__syringe-plunger {
	height: 32px;
	background: linear-gradient(#d6dde6, #8e9bad);
	border: 3px solid #718094;
	border-right: 0;
	border-radius: 9px 0 0 9px;
	box-shadow: inset 0 4px 0 rgba(255,255,255,.55);
}
.fss-calc__syringe-plunger::before { content: ""; display: block; width: 9px; height: 60px; margin: -17px 0 0 8px; background: #aeb9c7; border: 3px solid #718094; border-radius: 5px; }
.fss-calc__barrel {
	position: relative;
	height: 76px;
	overflow: visible;
	background: linear-gradient(180deg, rgba(255,255,255,.98), rgba(225,234,242,.9));
	border: 4px solid #718094;
	border-radius: 8px;
	box-shadow: inset 0 0 18px rgba(11,27,51,.14), 0 8px 18px rgba(0,0,0,.18);
}
.fss-calc__barrel-fill { position: absolute; inset: 0 auto 0 0; width: 5%; overflow: hidden; background: linear-gradient(90deg, rgba(167,121,36,.8), rgba(241,217,141,.92)); border-radius: 3px 0 0 3px; transition: width .25s ease; }
.fss-calc__barrel-ticks { position: absolute; inset: 7px 0 28px; background: repeating-linear-gradient(90deg, #334960 0 1px, transparent 1px 1%); opacity: .78; }
.fss-calc__barrel-ticks::after { content: ""; position: absolute; inset: 0; background: repeating-linear-gradient(90deg, #132b45 0 2px, transparent 2px 10%); }
.fss-calc__barrel-labels { position: absolute; inset: auto 0 6px; height: 16px; color: #102b4d; font: 800 9px/1 Inter, sans-serif; }
.fss-calc__barrel-labels span { position: absolute; transform: translateX(-50%); }
.fss-calc__barrel-labels span:nth-child(1) { left: 1%; }
.fss-calc__barrel-labels span:nth-child(2) { left: 10%; }
.fss-calc__barrel-labels span:nth-child(3) { left: 20%; }
.fss-calc__barrel-labels span:nth-child(4) { left: 30%; }
.fss-calc__barrel-labels span:nth-child(5) { left: 40%; }
.fss-calc__barrel-labels span:nth-child(6) { left: 50%; }
.fss-calc__barrel-labels span:nth-child(7) { left: 60%; }
.fss-calc__barrel-labels span:nth-child(8) { left: 70%; }
.fss-calc__barrel-labels span:nth-child(9) { left: 80%; }
.fss-calc__barrel-labels span:nth-child(10) { left: 90%; }
.fss-calc__barrel-labels span:nth-child(11) { left: 99%; }
.fss-calc__syringe-needle { height: 4px; background: linear-gradient(#dce4ec, #8998aa); box-shadow: 0 1px 0 #53657a; }
.fss-calc__syringe-needle::before { content: ""; display: block; width: 28px; height: 24px; margin-top: -10px; background: #8e9bad; border: 3px solid #718094; border-radius: 0 7px 7px 0; }
.fss-calc__barrel-status { grid-column: 1 / -1; margin: 10px 0 0; color: #e4c879; font-size: 13px; font-weight: 800; text-align: center; }
.fss-calc__result.is-invalid .fss-calc__barrel-fill { box-shadow: none; }
.fss-calc__error { grid-column: 1 / -1; margin: 0; padding: 12px 14px; color: #ffe8e4; background: rgba(165, 45, 35, .34); border: 1px solid rgba(255, 180, 170, .35); border-radius: 12px; font-size: 13px; }

.fss-calc__notice { display: flex; align-items: center; gap: 14px; margin-top: 22px; padding: 16px 18px; color: #596577; background: rgba(255,255,255,.7); border: 1px solid var(--fss-line); border-radius: 16px; }
.fss-calc__notice > span { display: grid; place-items: center; flex: 0 0 38px; height: 38px; color: var(--fss-gold); background: var(--fss-navy); border-radius: 50%; font: 800 11px/1 Inter, sans-serif; letter-spacing: .08em; }
.fss-calc__notice p { margin: 0; font-size: 12px; line-height: 1.55; }
.fss-calc__notice strong { color: var(--fss-navy); }

@media (max-width: 980px) {
	.fss-calc__steps { grid-template-columns: 1fr; }
	.fss-calc__hint { min-height: 0; }
}

@media (max-width: 640px) {
	.fss-calc { margin: 20px 10px; padding: 26px 16px; border-radius: 24px; }
	.fss-calc__header h2 { font-size: 40px; }
	.fss-calc__card { padding: 20px 16px; }
	.fss-calc__choices button { flex: 1 0 72px; min-height: 46px; }
	.fss-calc__result { grid-template-columns: 1fr; padding: 24px 18px; }
	.fss-calc__metrics { grid-template-columns: 1fr 1fr; }
	.fss-calc__syringe { grid-template-columns: 34px minmax(220px, 1fr) 32px; grid-template-rows: 88px auto; }
	.fss-calc__syringe-plunger::before { width: 7px; margin-left: 2px; }
	.fss-calc__syringe-needle::before { width: 16px; }
	.fss-calc__barrel-labels { font-size: 8px; }
}

@media (prefers-reduced-motion: reduce) {
	.fss-calc__choices button,
	.fss-calc__barrel-fill { transition: none; }
}