:root {
  --bg: #fbfbfc;
  --bg-2: #f4f6f8;
  --surface: rgba(255, 255, 255, .86);
  --surface-strong: #ffffff;

  --ink: #111318;
  --graphite: #24272d;
  --muted: #667085;
  --muted-2: #8a94a6;

  --line: rgba(17, 19, 24, .10);
  --line-strong: rgba(17, 19, 24, .18);

  --heart: #c10e21;
  --heart-2: #e12d3f;
  --heart-dark: #8f0b18;
  --heart-soft: #fff1f3;
  --heart-glow: rgba(193, 14, 33, .16);

  --blue-black: #071827;
  --blue-deep: #0b2d4d;
  --steel: #eef2f6;
  --steel-2: #e5eaf0;

  --success: #12b76a;
  --success-soft: #ecfdf3;
  --warning: #f79009;
  --warning-soft: #fffaeb;
  --danger: #c10e21;
  --danger-soft: #fff1f3;

  --radius: 18px;
  --radius-lg: 26px;

  --shadow-soft: 0 18px 60px rgba(16, 24, 40, .09);
  --shadow-strong: 0 28px 90px rgba(16, 24, 40, .16);
  --shadow-red: 0 18px 54px rgba(193, 14, 33, .18);

  --ease: cubic-bezier(.2, .8, .2, 1);
}

body.dark {
  --bg: #080a0d;
  --bg-2: #101318;
  --surface: rgba(18, 20, 25, .82);
  --surface-strong: #151820;

  --ink: #f6f7f9;
  --graphite: #f6f7f9;
  --muted: #a8b0bf;
  --muted-2: #7f8897;

  --line: rgba(255, 255, 255, .10);
  --line-strong: rgba(255, 255, 255, .18);

  --heart-soft: rgba(193, 14, 33, .14);
  --steel: #151a22;
  --steel-2: #202631;

  --shadow-soft: 0 18px 60px rgba(0, 0, 0, .34);
  --shadow-strong: 0 28px 90px rgba(0, 0, 0, .52);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  font-family: "DM Sans", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 0%, rgba(193, 14, 33, .075), transparent 30%),
    radial-gradient(circle at 92% 6%, rgba(7, 24, 39, .08), transparent 30%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  overflow-x: hidden;
}

body.dark {
  background:
    radial-gradient(circle at 12% 0%, rgba(193, 14, 33, .18), transparent 30%),
    radial-gradient(circle at 92% 6%, rgba(255, 255, 255, .06), transparent 28%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
}

button,
input,
select {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
}

.ambient-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(17, 19, 24, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17, 19, 24, .035) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .72), transparent 82%);
}

body.dark .ambient-grid {
  background-image:
    linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .78);
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
}

body.dark .site-header {
  background: rgba(8, 10, 13, .78);
}

.header-inner {
  height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: .78rem;
  min-width: fit-content;
}

.brand-mark {
  width: 48px;
  height: 48px;
  border-radius: 15px;
  display: grid;
  place-items: center;
  color: #fff;
  font-family: "Playfair Display", serif;
  font-weight: 900;
  font-size: 1.65rem;
  background:
    radial-gradient(circle at 30% 18%, rgba(255, 255, 255, .22), transparent 38%),
    linear-gradient(135deg, var(--blue-black), var(--blue-deep));
  box-shadow: 0 14px 34px rgba(7, 24, 39, .26);
  position: relative;
  overflow: hidden;
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 7px;
  border-radius: 11px;
  border: 1px solid rgba(255, 255, 255, .28);
}

.brand-text strong {
  display: block;
  font-family: "Playfair Display", serif;
  color: var(--blue-black);
  font-size: 1.2rem;
  line-height: 1;
  letter-spacing: -.025em;
}

body.dark .brand-text strong {
  color: var(--ink);
}

.brand-text span {
  display: block;
  margin-top: .25rem;
  font-family: "DM Mono", monospace;
  color: var(--heart);
  font-size: .61rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  font-weight: 700;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .28rem;
}

.nav-link {
  padding: .58rem .86rem;
  border-radius: 999px;
  font-size: .84rem;
  font-weight: 800;
  color: var(--muted);
  transition: all .22s var(--ease);
}

.nav-link:hover,
.nav-link.active {
  color: var(--blue-black);
  background: rgba(7, 24, 39, .075);
}

body.dark .nav-link:hover,
body.dark .nav-link.active {
  color: #fff;
  background: rgba(255, 255, 255, .08);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: .68rem;
}

.btn {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .48rem;
  min-height: 44px;
  padding: .76rem 1.02rem;
  border-radius: 14px;
  font-size: .76rem;
  font-weight: 900;
  letter-spacing: .045em;
  text-transform: uppercase;
  transition:
    transform .22s var(--ease),
    box-shadow .22s var(--ease),
    background .22s var(--ease),
    color .22s var(--ease),
    border-color .22s var(--ease);
}

.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent, rgba(255, 255, 255, .26), transparent);
  transform: translateX(-130%);
  transition: transform .58s var(--ease);
  pointer-events: none;
}

.btn:hover::after {
  transform: translateX(130%);
}

.btn i,
.btn svg {
  width: 16px;
  height: 16px;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--blue-black), var(--blue-deep));
  box-shadow: 0 12px 30px rgba(7, 24, 39, .22);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 44px rgba(7, 24, 39, .32);
}

.btn-red,
.btn-rose {
  color: #fff;
  background: linear-gradient(135deg, var(--heart), var(--heart-2));
  box-shadow: 0 12px 30px rgba(193, 14, 33, .22);
}

.btn-red:hover,
.btn-rose:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-red);
}

.btn-ghost {
  color: var(--blue-black);
  background: var(--surface);
  border: 1px solid var(--line-strong);
}

body.dark .btn-ghost {
  color: var(--ink);
}

.btn-ghost:hover {
  transform: translateY(-2px);
  background: var(--surface-strong);
  border-color: rgba(193, 14, 33, .28);
}

.btn.full {
  width: 100%;
}

.hero {
  padding: 5.4rem 0 3rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.03fr .97fr;
  gap: 3rem;
  align-items: center;
}

.eyebrow {
  font-family: "DM Mono", monospace;
  color: var(--heart);
  font-size: .68rem;
  font-weight: 800;
  letter-spacing: .16em;
  text-transform: uppercase;
  margin-bottom: .82rem;
}

.hero h1 {
  max-width: 710px;
  font-family: "Playfair Display", serif;
  color: var(--blue-black);
  font-size: clamp(3rem, 6vw, 5.65rem);
  line-height: .94;
  letter-spacing: -.058em;
  font-weight: 900;
}

body.dark .hero h1 {
  color: var(--ink);
}

.hero h1 em {
  color: var(--heart);
  font-style: italic;
}

.hero-sub {
  max-width: 610px;
  margin-top: 1.25rem;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.68;
}

.search-hero {
  margin-top: 1.65rem;
  width: min(680px, 100%);
  min-height: 58px;
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  background: var(--surface-strong);
  box-shadow: var(--shadow-soft);
  display: flex;
  align-items: center;
  gap: .72rem;
  padding: .55rem .62rem .55rem 1rem;
  transition: border-color .22s var(--ease), box-shadow .22s var(--ease), transform .22s var(--ease);
}

.search-hero:focus-within {
  transform: translateY(-2px);
  border-color: rgba(193, 14, 33, .45);
  box-shadow: 0 24px 70px rgba(16, 24, 40, .12), 0 0 0 5px rgba(193, 14, 33, .08);
}

.search-hero svg {
  width: 20px;
  height: 20px;
  color: var(--heart);
  flex: 0 0 auto;
}

.search-hero input {
  min-height: 44px;
  border: 0;
  background: transparent;
  box-shadow: none;
  border-radius: 0;
  padding: 0;
  color: var(--ink);
  font-size: .98rem;
  font-weight: 800;
}

.search-hero input:focus {
  box-shadow: none;
}

.search-hero input::placeholder {
  color: var(--muted-2);
  font-weight: 700;
}

#clearSearchBtn {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--steel);
  color: var(--muted);
  transition: all .2s var(--ease);
}

#clearSearchBtn:hover {
  background: var(--heart-soft);
  color: var(--heart);
}

.quick-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .52rem;
  margin-top: .92rem;
}

.quick-actions button {
  min-height: 34px;
  padding: .42rem .68rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, .72);
  border: 1px solid var(--line);
  color: var(--graphite);
  font-size: .76rem;
  font-weight: 900;
  transition: all .2s var(--ease);
}

body.dark .quick-actions button {
  background: rgba(255, 255, 255, .06);
  color: var(--ink);
}

.quick-actions button:hover {
  transform: translateY(-2px);
  border-color: rgba(193, 14, 33, .38);
  color: var(--heart);
  background: var(--heart-soft);
}

.hero-actions {
  margin-top: 1.7rem;
  display: flex;
  gap: .88rem;
  flex-wrap: wrap;
}

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: .52rem;
  margin-top: 1.35rem;
}

.trust-row span {
  padding: .42rem .68rem;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  border-radius: 999px;
  font-size: .74rem;
  font-weight: 800;
}

.hero-panel,
.mode-card,
.ref-card,
.calc-card,
.pro-card,
.workflow-shell,
.deep-card,
.interpretation-panel,
.cta-card {
  position: relative;
  isolation: isolate;
}

.hero-panel::before,
.mode-card::before,
.ref-card::before,
.calc-card::before,
.pro-card::before,
.workflow-shell::before,
.deep-card::before,
.interpretation-panel::before,
.cta-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, .72) 0%, rgba(255, 255, 255, .20) 34%, rgba(255, 255, 255, 0) 62%);
  opacity: .46;
}

body.dark .hero-panel::before,
body.dark .mode-card::before,
body.dark .ref-card::before,
body.dark .calc-card::before,
body.dark .pro-card::before,
body.dark .workflow-shell::before,
body.dark .deep-card::before,
body.dark .interpretation-panel::before,
body.dark .cta-card::before {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, .10) 0%, rgba(255, 255, 255, .04) 38%, rgba(255, 255, 255, 0) 62%);
  opacity: .7;
}

.hero-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 32px;
  box-shadow: var(--shadow-strong);
  padding: 1.15rem;
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
  transform: rotate(.25deg);
  overflow: hidden;
}

.hero-panel-top {
  min-height: 250px;
  border-radius: 24px;
  padding: 2rem;
  color: #fff;
  background:
    radial-gradient(circle at 86% 22%, rgba(193, 14, 33, .36), transparent 30%),
    linear-gradient(135deg, var(--blue-black), #16436b);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.panel-kicker {
  display: block;
  font-family: "DM Mono", monospace;
  font-size: .68rem;
  color: rgba(255, 255, 255, .68);
  letter-spacing: .14em;
  text-transform: uppercase;
  margin-bottom: .75rem;
}

.hero-panel-top strong {
  font-family: "Playfair Display", serif;
  font-size: clamp(2.1rem, 4vw, 3.6rem);
  line-height: .98;
  letter-spacing: -.045em;
}

.hero-panel-top p {
  max-width: 450px;
  margin-top: .88rem;
  color: rgba(255, 255, 255, .80);
  line-height: 1.56;
  font-weight: 600;
}

.mini-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .76rem;
  margin-top: .86rem;
}

.mini-card {
  background: var(--surface-strong);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: .95rem;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, .70) inset,
    0 10px 26px rgba(16, 24, 40, .04);
}

body.dark .mini-card {
  box-shadow:
    0 1px 0 rgba(255, 255, 255, .08) inset,
    0 10px 26px rgba(0, 0, 0, .18);
}

.mini-card span {
  display: block;
  color: var(--muted);
  font-family: "DM Mono", monospace;
  font-size: .63rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  margin-bottom: .34rem;
  font-weight: 800;
}

.mini-card strong {
  display: block;
  color: var(--blue-black);
  font-size: 1.02rem;
  font-weight: 900;
}

body.dark .mini-card strong {
  color: var(--ink);
}

.locked-mini {
  background:
    linear-gradient(135deg, rgba(193, 14, 33, .08), var(--surface-strong));
  border-color: rgba(193, 14, 33, .18);
}

.mode-switch-section {
  padding: .25rem 0 2rem;
}

.mode-card {
  display: flex;
  justify-content: space-between;
  gap: 1.35rem;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow-soft);
  padding: 1.05rem;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.mode-card h2 {
  font-size: 1.1rem;
  color: var(--blue-black);
  max-width: 620px;
  letter-spacing: -.02em;
}

body.dark .mode-card h2 {
  color: var(--ink);
}

.segmented {
  display: flex;
  flex-wrap: wrap;
  gap: .42rem;
  background: rgba(17, 19, 24, .055);
  padding: .34rem;
  border-radius: 999px;
}

body.dark .segmented {
  background: rgba(255, 255, 255, .06);
}

.segment {
  min-height: 38px;
  padding: .48rem .78rem;
  border-radius: 999px;
  color: var(--muted);
  background: transparent;
  font-size: .76rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .04em;
  transition: all .2s var(--ease);
}

.segment.active {
  color: #fff;
  background: linear-gradient(135deg, var(--heart), var(--heart-2));
  box-shadow: 0 8px 20px rgba(193, 14, 33, .20);
}

.section {
  padding: 4.35rem 0;
}

.section-alt {
  background:
    linear-gradient(180deg, rgba(17, 19, 24, .025), rgba(193, 14, 33, .035));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-head {
  max-width: 820px;
  margin-bottom: 1.85rem;
}

.compact-head {
  max-width: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 420px);
  gap: 1.4rem;
  align-items: end;
}

.section-head h2 {
  font-family: "Playfair Display", serif;
  color: var(--blue-black);
  font-size: clamp(2rem, 4.1vw, 3.35rem);
  line-height: 1;
  letter-spacing: -.045em;
  margin-bottom: .85rem;
}

body.dark .section-head h2 {
  color: var(--ink);
}

.section-head p {
  color: var(--muted);
  font-size: .96rem;
  line-height: 1.65;
}

.reference-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: .52rem;
  margin-bottom: 1.25rem;
}

.chip {
  min-height: 38px;
  padding: .48rem .84rem;
  border-radius: 999px;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--line);
  font-size: .76rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .05em;
  transition: all .2s var(--ease);
}

.chip:hover,
.chip.active {
  color: #fff;
  background: linear-gradient(135deg, var(--heart), var(--heart-2));
  border-color: transparent;
  box-shadow: 0 10px 24px rgba(193, 14, 33, .18);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.05rem;
}

.cards-grid.compact {
  margin-top: 1.35rem;
}

.ref-card {
  overflow: hidden;
  min-height: 220px;
  background:
    radial-gradient(circle at 96% 104%, rgba(193, 14, 33, .10), transparent 42%),
    var(--surface);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow-soft);
  padding: 1.18rem;
  transition:
    transform .26s var(--ease),
    box-shadow .26s var(--ease),
    border-color .26s var(--ease),
    background .26s var(--ease);
}

.ref-card:hover {
  transform: translateY(-6px);
  border-color: rgba(193, 14, 33, .36);
  box-shadow:
    0 26px 80px rgba(16, 24, 40, .16),
    0 0 0 1px rgba(255, 255, 255, .55) inset;
  background:
    radial-gradient(circle at 96% 104%, rgba(193, 14, 33, .14), transparent 44%),
    var(--surface-strong);
}

body.dark .ref-card:hover {
  box-shadow:
    0 26px 80px rgba(0, 0, 0, .52),
    0 0 0 1px rgba(255, 255, 255, .10) inset;
}

.ref-card .card-shine,
.calc-card .card-shine,
.pro-card .card-shine {
  position: absolute;
  top: -120%;
  left: -120%;
  width: 90%;
  height: 260%;
  z-index: 2;
  pointer-events: none;
  background:
    linear-gradient(
      115deg,
      transparent 0%,
      transparent 38%,
      rgba(255, 255, 255, .42) 48%,
      rgba(255, 255, 255, .18) 54%,
      transparent 66%,
      transparent 100%
    );
  transform: translateX(-20%) rotate(8deg);
  opacity: 0;
}

.ref-card:hover .card-shine,
.calc-card:hover .card-shine,
.pro-card:hover .card-shine {
  animation: cardGlaceSweep .85s var(--ease) forwards;
}

@keyframes cardGlaceSweep {
  0% {
    opacity: 0;
    transform: translateX(-35%) rotate(8deg);
  }

  18% {
    opacity: .75;
  }

  100% {
    opacity: 0;
    transform: translateX(310%) rotate(8deg);
  }
}

.ref-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: .8rem;
  margin-bottom: .88rem;
}

.ref-icon {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  color: var(--blue-black);
  background: rgba(7, 24, 39, .055);
  border: 1px solid var(--line);
  transition:
    transform .24s var(--ease),
    background .24s var(--ease),
    color .24s var(--ease),
    box-shadow .24s var(--ease),
    border-color .24s var(--ease);
}

body.dark .ref-icon {
  color: var(--ink);
  background: rgba(255, 255, 255, .06);
}

.ref-card:hover .ref-icon {
  color: #fff;
  background: linear-gradient(135deg, var(--heart), var(--heart-2));
  border-color: transparent;
  transform: scale(1.04) rotate(-2deg);
  box-shadow: 0 12px 26px rgba(193, 14, 33, .20);
}

.ref-icon svg {
  width: 21px;
  height: 21px;
}

.ref-card h3 {
  color: var(--blue-black);
  font-size: 1.08rem;
  font-weight: 900;
  margin-bottom: .28rem;
  letter-spacing: -.02em;
}

body.dark .ref-card h3 {
  color: var(--ink);
}

.ref-card p {
  color: var(--muted);
  font-size: .88rem;
  line-height: 1.48;
}

.ref-values {
  display: grid;
  gap: .5rem;
  margin-top: .95rem;
}

.ref-value {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .72rem;
  padding: .58rem .7rem;
  border-radius: 13px;
  background: rgba(17, 19, 24, .04);
  border: 1px solid var(--line);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, .70) inset,
    0 10px 26px rgba(16, 24, 40, .04);
  transition:
    transform .2s var(--ease),
    border-color .2s var(--ease),
    background .2s var(--ease);
}

body.dark .ref-value {
  background: rgba(255, 255, 255, .045);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, .08) inset,
    0 10px 26px rgba(0, 0, 0, .18);
}

.ref-card:hover .ref-value {
  border-color: rgba(193, 14, 33, .14);
}

.ref-value:hover {
  transform: translateX(3px);
  background: var(--heart-soft);
  border-color: rgba(193, 14, 33, .22);
}

.ref-value span {
  color: var(--muted);
  font-size: .75rem;
  font-weight: 850;
}

.ref-value strong {
  color: var(--blue-black);
  font-family: "DM Mono", monospace;
  font-size: .78rem;
  text-align: right;
}

body.dark .ref-value strong {
  color: var(--ink);
}

.ref-tag {
  display: inline-flex;
  margin-top: .85rem;
  padding: .34rem .55rem;
  border-radius: 999px;
  background: var(--heart-soft);
  color: var(--heart);
  border: 1px solid rgba(193, 14, 33, .16);
  font-size: .68rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .05em;
}

.empty-state {
  margin-top: 1rem;
  border: 1px dashed rgba(193, 14, 33, .28);
  background: var(--heart-soft);
  border-radius: 22px;
  padding: 1.4rem;
  color: var(--heart);
  display: grid;
  gap: .35rem;
  justify-items: start;
}

.empty-state svg {
  width: 26px;
  height: 26px;
}

.empty-state strong {
  color: var(--heart);
  font-size: 1rem;
}

.empty-state span {
  color: var(--muted);
  font-size: .9rem;
}

.calculator-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.05rem;
}

.calc-card,
.pro-card,
.workflow-shell,
.deep-card,
.interpretation-panel,
.cta-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow-soft);
  padding: 1.3rem;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  overflow: hidden;
}

.calc-card {
  transition: transform .24s var(--ease), border-color .24s var(--ease), box-shadow .24s var(--ease);
}

.calc-card:hover,
.pro-card:hover,
.deep-card:hover,
.interpretation-panel:hover {
  transform: translateY(-5px);
  border-color: rgba(193, 14, 33, .28);
  box-shadow:
    0 26px 80px rgba(16, 24, 40, .14),
    0 0 0 1px rgba(255, 255, 255, .42) inset;
}

body.dark .calc-card:hover,
body.dark .pro-card:hover,
body.dark .deep-card:hover,
body.dark .interpretation-panel:hover {
  box-shadow:
    0 26px 80px rgba(0, 0, 0, .48),
    0 0 0 1px rgba(255, 255, 255, .10) inset;
}

.calc-head,
.card-head,
.panel-title {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.calc-head h3,
.card-head h3,
.panel-title h3 {
  color: var(--blue-black);
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: -.02em;
}

body.dark .calc-head h3,
body.dark .card-head h3,
body.dark .panel-title h3 {
  color: var(--ink);
}

.calc-head span,
.panel-title span {
  display: block;
  margin-top: .2rem;
  color: var(--muted);
  font-size: .81rem;
  font-weight: 750;
}

.card-head svg,
.calc-head svg,
.panel-title svg,
.pro-card > svg {
  color: var(--heart);
  width: 25px;
  height: 25px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: .78rem;
}

label {
  position: relative;
  display: grid;
  gap: .36rem;
  color: var(--muted);
  font-size: .72rem;
  font-weight: 900;
  letter-spacing: .045em;
  text-transform: uppercase;
}

input,
select {
  width: 100%;
  min-height: 44px;
  border-radius: 13px;
  border: 1px solid var(--line-strong);
  background: var(--surface-strong);
  color: var(--ink);
  padding: .68rem .82rem;
  outline: none;
  font-weight: 850;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease);
}

label:has(.unit) input {
  padding-right: 3.1rem;
}

input:focus,
select:focus {
  border-color: rgba(193, 14, 33, .70);
  box-shadow: 0 0 0 4px rgba(193, 14, 33, .10);
}

.unit {
  position: absolute;
  right: .75rem;
  bottom: .75rem;
  color: var(--muted-2);
  font-family: "DM Mono", monospace;
  font-size: .68rem;
  font-weight: 800;
  pointer-events: none;
}

.result-strip,
.result-stack {
  margin-top: .95rem;
}

.result-strip {
  min-height: 72px;
  border-radius: 18px;
  padding: 1rem;
  background:
    radial-gradient(circle at 92% 20%, rgba(193, 14, 33, .28), transparent 32%),
    linear-gradient(135deg, var(--blue-black), var(--blue-deep));
  color: #fff;
}

.result-strip span,
.result-stack span {
  display: block;
  font-size: .71rem;
  font-weight: 900;
  opacity: .72;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.result-strip strong {
  display: block;
  margin-top: .33rem;
  font-family: "Playfair Display", serif;
  font-size: 2rem;
  line-height: 1;
}

.result-stack {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .72rem;
}

.result-stack div {
  min-height: 84px;
  border-radius: 18px;
  padding: .95rem;
  background: rgba(17, 19, 24, .04);
  border: 1px solid var(--line);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, .70) inset,
    0 10px 26px rgba(16, 24, 40, .04);
}

body.dark .result-stack div {
  background: rgba(255, 255, 255, .045);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, .08) inset,
    0 10px 26px rgba(0, 0, 0, .18);
}

.result-stack strong {
  display: block;
  margin-top: .4rem;
  color: var(--blue-black);
  font-size: 1.02rem;
  font-weight: 950;
  line-height: 1.2;
}

body.dark .result-stack strong {
  color: var(--ink);
}

.result-good strong {
  color: var(--success);
}

.result-warn strong {
  color: var(--warning);
}

.result-bad strong {
  color: var(--danger);
}

.pro-inline {
  width: 100%;
  margin-top: .85rem;
  min-height: 42px;
  padding: .72rem .82rem;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--heart-soft), rgba(255, 255, 255, .68));
  border: 1px solid rgba(193, 14, 33, .18);
  color: var(--heart);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .7rem;
  font-size: .78rem;
  font-weight: 900;
  transition: all .22s var(--ease);
}

body.dark .pro-inline {
  background: rgba(193, 14, 33, .10);
}

.pro-inline:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(193, 14, 33, .12);
  border-color: rgba(193, 14, 33, .36);
}

.pro-inline span,
.pro-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 24px;
  padding: .22rem .48rem;
  border-radius: 999px;
  background: var(--heart);
  color: #fff;
  font-family: "DM Mono", monospace;
  font-size: .65rem;
  font-weight: 900;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.workflow-shell {
  padding: 1.15rem;
}

.workflow-tabs {
  display: inline-flex;
  gap: .4rem;
  padding: .35rem;
  border-radius: 999px;
  background: rgba(17, 19, 24, .055);
  margin-bottom: 1rem;
}

body.dark .workflow-tabs {
  background: rgba(255, 255, 255, .06);
}

.workflow-tab {
  min-height: 38px;
  padding: .48rem .8rem;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-size: .75rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .045em;
  transition: all .2s var(--ease);
}

.workflow-tab.active {
  background: var(--blue-black);
  color: #fff;
}

body.dark .workflow-tab.active {
  background: #fff;
  color: #111318;
}

.workflow-track {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: .65rem;
}

.workflow-step {
  min-height: 78px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface-strong);
  color: var(--graphite);
  display: grid;
  align-content: center;
  justify-items: start;
  gap: .35rem;
  padding: .8rem;
  font-weight: 900;
  text-align: left;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, .70) inset,
    0 10px 26px rgba(16, 24, 40, .04);
  transition: all .22s var(--ease);
}

body.dark .workflow-step {
  color: var(--ink);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, .08) inset,
    0 10px 26px rgba(0, 0, 0, .18);
}

.workflow-step span {
  font-family: "DM Mono", monospace;
  color: var(--muted);
  font-size: .68rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.workflow-step:hover,
.workflow-step.active {
  transform: translateY(-3px);
  border-color: rgba(193, 14, 33, .32);
  box-shadow: var(--shadow-soft);
}

.workflow-step.active {
  background: var(--heart-soft);
  color: var(--heart);
}

.locked-step {
  border-color: rgba(193, 14, 33, .22);
  background: linear-gradient(135deg, var(--heart-soft), var(--surface-strong));
}

.workflow-preview {
  margin-top: .9rem;
  border-radius: 22px;
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 92% 20%, rgba(193, 14, 33, .12), transparent 32%),
    var(--surface-strong);
  padding: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
}

.workflow-preview h3 {
  color: var(--blue-black);
  font-size: 1.25rem;
  font-weight: 900;
  margin-bottom: .35rem;
}

body.dark .workflow-preview h3 {
  color: var(--ink);
}

.workflow-preview p {
  color: var(--muted);
  line-height: 1.55;
  max-width: 720px;
}

.pro-grid {
  display: grid;
  grid-template-columns: 1.25fr repeat(2, minmax(0, .75fr));
  gap: 1.05rem;
}

.main-pro {
  grid-row: span 2;
}

.pro-card {
  background:
    radial-gradient(circle at 96% 104%, rgba(193, 14, 33, .10), transparent 42%),
    var(--surface);
}

.pro-card h3 {
  color: var(--blue-black);
  font-size: 1.15rem;
  font-weight: 900;
  line-height: 1.2;
  margin: .8rem 0 .52rem;
  letter-spacing: -.02em;
}

body.dark .pro-card h3 {
  color: var(--ink);
}

.pro-card p {
  color: var(--muted);
  line-height: 1.55;
  font-size: .9rem;
}

.main-pro h3 {
  font-family: "Playfair Display", serif;
  font-size: clamp(2rem, 3vw, 3rem);
  line-height: 1;
  letter-spacing: -.045em;
}

.clinical-output {
  min-height: 185px;
  border-radius: 18px;
  padding: 1.1rem;
  background:
    linear-gradient(135deg, rgba(17, 19, 24, .045), rgba(193, 14, 33, .05));
  border: 1px solid var(--line);
  color: var(--ink);
  line-height: 1.68;
  margin: 1rem 0;
}

.pro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .72rem;
}

.pro-badge {
  margin-top: .9rem;
  background: var(--heart);
}

.footer-cta {
  padding-top: 2rem;
}

.cta-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: center;
  background:
    radial-gradient(circle at 92% 20%, rgba(193, 14, 33, .12), transparent 30%),
    linear-gradient(135deg, var(--surface), var(--surface-strong));
}

.cta-card h2 {
  color: var(--blue-black);
  font-family: "Playfair Display", serif;
  font-size: clamp(2rem, 3.4vw, 3.05rem);
  line-height: 1;
  letter-spacing: -.045em;
  margin-bottom: .78rem;
}

body.dark .cta-card h2 {
  color: var(--ink);
}

.cta-card p {
  max-width: 700px;
  color: var(--muted);
  line-height: 1.62;
}

.site-footer {
  padding: 2.2rem 0 3rem;
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  color: var(--muted);
}

.footer-inner strong {
  display: block;
  color: var(--blue-black);
  font-family: "Playfair Display", serif;
  font-size: 1.25rem;
}

body.dark .footer-inner strong {
  color: var(--ink);
}

.footer-inner span {
  display: block;
  margin-top: .25rem;
  font-size: .9rem;
}

.footer-inner p {
  max-width: 560px;
  font-size: .82rem;
  line-height: 1.6;
}

.detail-drawer {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: none;
}

.detail-drawer.open {
  display: block;
}

.drawer-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(8, 10, 13, .58);
  backdrop-filter: blur(10px);
}

.drawer-panel {
  position: absolute;
  top: 0;
  right: 0;
  width: min(520px, 100%);
  height: 100%;
  background: var(--surface-strong);
  border-left: 1px solid var(--line);
  box-shadow: var(--shadow-strong);
  padding: 1.3rem;
  overflow-y: auto;
  animation: drawerIn .28s var(--ease);
}

@keyframes drawerIn {
  from {
    transform: translateX(32px);
    opacity: 0;
  }

  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.drawer-close {
  position: sticky;
  top: 0;
  margin-left: auto;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--steel);
  color: var(--graphite);
  z-index: 2;
}

body.dark .drawer-close {
  color: var(--ink);
}

.drawer-close svg {
  width: 18px;
  height: 18px;
}

.drawer-content {
  padding: .5rem .2rem 1.2rem;
}

.drawer-content h2 {
  color: var(--blue-black);
  font-family: "Playfair Display", serif;
  font-size: 2.35rem;
  line-height: 1;
  letter-spacing: -.045em;
  margin-bottom: .85rem;
}

body.dark .drawer-content h2 {
  color: var(--ink);
}

.drawer-content p {
  color: var(--muted);
  line-height: 1.65;
}

.drawer-values {
  display: grid;
  gap: .65rem;
  margin-top: 1.1rem;
}

.drawer-values .ref-value {
  padding: .8rem .9rem;
}

.drawer-note {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: 18px;
  background: var(--steel);
  border: 1px solid var(--line);
  color: var(--muted);
  line-height: 1.6;
  font-size: .92rem;
}

.drawer-pro {
  margin-top: 1rem;
  border-radius: 20px;
  padding: 1rem;
  border: 1px solid rgba(193, 14, 33, .20);
  background:
    radial-gradient(circle at 90% 10%, rgba(193, 14, 33, .13), transparent 34%),
    var(--heart-soft);
}

.drawer-pro strong {
  display: block;
  color: var(--heart);
  font-size: .95rem;
  font-weight: 950;
  margin-bottom: .35rem;
}

.drawer-pro span {
  display: block;
  color: var(--muted);
  line-height: 1.55;
  margin-bottom: .9rem;
  font-size: .9rem;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: none;
  place-items: center;
  padding: 1rem;
  background: rgba(8, 10, 13, .72);
  backdrop-filter: blur(18px);
}

.modal.open {
  display: grid;
}

.modal-card {
  position: relative;
  width: min(620px, 100%);
  background: var(--surface-strong);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow-strong);
  padding: 1.6rem;
  animation: modalIn .24s var(--ease);
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: translateY(18px) scale(.98);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--graphite);
  background: var(--steel);
}

body.dark .modal-close {
  color: var(--ink);
}

.modal-close svg {
  width: 18px;
  height: 18px;
}

.modal-head {
  padding-right: 2.8rem;
  margin-bottom: 1.2rem;
}

.modal-head h2 {
  color: var(--blue-black);
  font-family: "Playfair Display", serif;
  font-size: 2.15rem;
  line-height: 1;
  margin-bottom: .7rem;
  letter-spacing: -.04em;
}

body.dark .modal-head h2 {
  color: var(--ink);
}

.modal-head p {
  color: var(--muted);
  line-height: 1.62;
}

.modal-form {
  display: grid;
  gap: .86rem;
}

.toast {
  position: fixed;
  right: 1.2rem;
  bottom: 1.2rem;
  z-index: 100;
  max-width: 360px;
  display: none;
  padding: .95rem 1.12rem;
  border-radius: 18px;
  color: #fff;
  background:
    radial-gradient(circle at 92% 10%, rgba(193, 14, 33, .35), transparent 38%),
    linear-gradient(135deg, var(--blue-black), var(--blue-deep));
  box-shadow: var(--shadow-strong);
  font-weight: 850;
  line-height: 1.42;
}

.toast.show {
  display: block;
  animation: toastIn .22s var(--ease);
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hidden-by-filter {
  display: none !important;
}

@media (max-width: 1080px) {
  .hero-grid,
  .calculator-grid,
  .cta-card {
    grid-template-columns: 1fr;
  }

  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pro-grid {
    grid-template-columns: 1fr 1fr;
  }

  .main-pro {
    grid-column: 1 / -1;
    grid-row: auto;
  }

  .workflow-track {
    grid-template-columns: repeat(4, 1fr);
  }

  .compact-head {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .mode-card {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero-panel {
    transform: none;
  }
}

@media (max-width: 780px) {
  .container {
    width: min(100% - 28px, 1180px);
  }

  .header-inner {
    height: auto;
    padding: .85rem 0;
    align-items: flex-start;
    flex-direction: column;
  }

  .brand-text span {
    max-width: 230px;
    line-height: 1.35;
  }

  .nav {
    width: 100%;
    overflow-x: auto;
    justify-content: flex-start;
    padding-bottom: .18rem;
  }

  .header-actions {
    width: 100%;
  }

  .header-actions .btn {
    flex: 1;
  }

  .hero {
    padding-top: 3rem;
  }

  .hero h1 {
    font-size: clamp(3rem, 13vw, 4.35rem);
  }

  .hero-sub {
    font-size: .98rem;
  }

  .search-hero {
    border-radius: 18px;
    min-height: 54px;
  }

  .cards-grid,
  .mini-grid,
  .form-grid,
  .result-stack,
  .pro-grid,
  .workflow-track {
    grid-template-columns: 1fr;
  }

  .workflow-preview {
    align-items: stretch;
    flex-direction: column;
  }

  .section {
    padding: 3.1rem 0;
  }

  .section-head h2 {
    font-size: clamp(2rem, 10vw, 3rem);
  }

  .hero-panel-top {
    min-height: 220px;
  }

  .footer-inner {
    flex-direction: column;
  }

  .drawer-panel {
    width: 100%;
    border-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .btn::after,
  .ref-card .card-shine,
  .calc-card .card-shine,
  .pro-card .card-shine {
    display: none !important;
  }
}