/* Public marketing site — glass shell */
:root {
  --mk-bg: transparent;
  --mk-surface: rgba(255, 255, 255, 0.48);
  --mk-border: rgba(255, 255, 255, 0.38);
  --mk-text: #0c1222;
  --mk-muted: #64748b;
  --mk-accent: #4f46e5;
  --mk-radius: 18px;
  --mk-blur: 28px;
  --mk-sat: 1.45;
  --mk-shine: inset 0 1px 0 rgba(255, 255, 255, 0.82), inset 0 -1px 0 rgba(255, 255, 255, 0.08);
  --mk-glow: 0 8px 32px rgba(99, 102, 241, 0.1), 0 2px 8px rgba(15, 23, 42, 0.04);
  --mk-glow-hover: 0 16px 48px rgba(99, 102, 241, 0.16), 0 8px 24px rgba(79, 70, 229, 0.1);
  --mk-shadow: var(--mk-shine), var(--mk-glow);
  --mk-max: 1120px;
  --mk-font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mk-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --mk-duration: 0.4s;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--mk-font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--mk-text);
  background-color: #dde3f5;
  background-image: radial-gradient(ellipse 110% 75% at 0% -8%, rgba(99, 102, 241, 0.32), transparent 52%),
    radial-gradient(ellipse 95% 65% at 100% 0%, rgba(147, 51, 234, 0.2), transparent 50%),
    radial-gradient(ellipse 75% 55% at 50% 105%, rgba(56, 189, 248, 0.16), transparent 55%),
    linear-gradient(168deg, #d8e0fb 0%, #e8ecff 36%, #eef1ff 70%, #e2e8ff 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--mk-radius);
}

a {
  color: var(--mk-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.mk-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.38);
  backdrop-filter: blur(var(--mk-blur)) saturate(var(--mk-sat));
  -webkit-backdrop-filter: blur(var(--mk-blur)) saturate(var(--mk-sat));
  border-bottom: 1px solid rgba(255, 255, 255, 0.55);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.55) inset;
}

.mk-header__inner {
  position: relative;
  max-width: var(--mk-max);
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.mk-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1rem;
  color: var(--mk-text);
  text-decoration: none;
}

.mk-logo:hover {
  text-decoration: none;
  color: var(--mk-accent);
}

.mk-logo img {
  height: 32px;
  width: auto;
  max-width: min(200px, 48vw);
  object-fit: contain;
  object-position: left center;
  padding: 5px 11px;
  border-radius: 11px;
  background: linear-gradient(160deg, rgba(15, 23, 42, 0.07), rgba(79, 70, 229, 0.1));
  border: 1px solid rgba(15, 23, 42, 0.1);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.65);
  filter: drop-shadow(0 0 1px rgba(15, 23, 42, 0.35)) drop-shadow(0 1px 3px rgba(15, 23, 42, 0.12));
  box-sizing: content-box;
}

.mk-nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(20px) saturate(var(--mk-sat));
  -webkit-backdrop-filter: blur(20px) saturate(var(--mk-sat));
  box-shadow: var(--mk-shine), var(--mk-glow);
  cursor: pointer;
  font-size: 1.25rem;
  transition: transform var(--mk-duration) var(--mk-ease), box-shadow var(--mk-duration) var(--mk-ease);
}

.mk-nav-toggle:hover {
  transform: translateY(-2px);
  box-shadow: var(--mk-shine), var(--mk-glow-hover);
}

@media (min-width: 992px) {
  .mk-nav-toggle {
    display: none;
  }
}

.mk-nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

@media (min-width: 992px) {
  .mk-nav {
    flex-direction: row;
    align-items: center;
    gap: 8px;
  }
}

.mk-nav a {
  padding: 10px 14px;
  border-radius: 12px;
  color: var(--mk-muted);
  font-weight: 500;
  font-size: 0.9375rem;
  text-decoration: none;
  transition: background var(--mk-duration) var(--mk-ease), color var(--mk-duration) var(--mk-ease);
}

.mk-nav a:hover,
.mk-nav a[aria-current="page"] {
  background: rgba(79, 70, 229, 0.08);
  color: var(--mk-accent);
  text-decoration: none;
}

.mk-nav-wrap {
  display: none;
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(var(--mk-blur)) saturate(var(--mk-sat));
  -webkit-backdrop-filter: blur(var(--mk-blur)) saturate(var(--mk-sat));
  border-bottom: 1px solid rgba(255, 255, 255, 0.45);
  padding: 16px 20px 20px;
  box-shadow: var(--mk-shine), 0 24px 48px rgba(99, 102, 241, 0.1);
  flex-direction: column;
  gap: 16px;
  align-items: stretch;
}

.mk-nav-wrap.is-open {
  display: flex;
}

@media (min-width: 992px) {
  .mk-nav-wrap {
    display: flex !important;
    position: static;
    flex-direction: row;
    align-items: center;
    gap: 12px;
    padding: 0;
    border: none;
    box-shadow: none;
    background: transparent;
  }
}

.mk-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.9375rem;
  background: linear-gradient(135deg, #5b52f0 0%, var(--mk-accent) 50%, #4338ca 100%);
  color: #fff !important;
  border: 1px solid rgba(255, 255, 255, 0.28);
  cursor: pointer;
  text-decoration: none !important;
  transition: transform var(--mk-duration) var(--mk-ease), box-shadow var(--mk-duration) var(--mk-ease);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35), 0 10px 32px rgba(79, 70, 229, 0.38);
}

.mk-btn:hover {
  transform: translateY(-3px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.45), 0 16px 44px rgba(79, 70, 229, 0.45);
}

.mk-main {
  max-width: var(--mk-max);
  margin: 0 auto;
  padding: 40px 20px 64px;
}

.mk-hero {
  text-align: center;
  padding: 32px 0 48px;
}

.mk-hero h1 {
  margin: 0 0 16px;
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.mk-hero .mk-lead {
  margin: 0 auto 28px;
  max-width: 42rem;
  color: var(--mk-muted);
  font-size: 1.0625rem;
}

.mk-hero-media {
  margin: 0 auto;
  max-width: 900px;
  border-radius: calc(var(--mk-radius) + 6px);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.38);
  box-shadow: var(--mk-shine), var(--mk-glow-hover);
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.mk-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .mk-grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.mk-card {
  background: rgba(255, 255, 255, 0.48);
  backdrop-filter: blur(var(--mk-blur)) saturate(var(--mk-sat));
  -webkit-backdrop-filter: blur(var(--mk-blur)) saturate(var(--mk-sat));
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: var(--mk-radius);
  padding: 24px;
  box-shadow: var(--mk-shine), var(--mk-glow);
  transition: transform var(--mk-duration) var(--mk-ease), border-color var(--mk-duration) var(--mk-ease),
    box-shadow var(--mk-duration) var(--mk-ease), background var(--mk-duration) var(--mk-ease);
}

.mk-card:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.72);
  border-color: rgba(255, 255, 255, 0.55);
  box-shadow: var(--mk-shine), var(--mk-glow-hover);
}

.mk-card h3 {
  margin: 0 0 10px;
  font-size: 1.125rem;
}

.mk-card p {
  margin: 0;
  color: var(--mk-muted);
  font-size: 0.9375rem;
}

.mk-section {
  margin-top: 48px;
}

.mk-split {
  display: grid;
  gap: 32px;
  align-items: center;
}

@media (min-width: 900px) {
  .mk-split {
    grid-template-columns: 1fr 1fr;
  }
}

.mk-split h2 {
  margin: 0 0 16px;
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: -0.02em;
}

.mk-split p {
  margin: 0;
  color: var(--mk-muted);
}

.mk-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.4);
  padding: 28px 20px;
  text-align: center;
  color: var(--mk-muted);
  font-size: 0.875rem;
  background: rgba(255, 255, 255, 0.22);
  backdrop-filter: blur(20px) saturate(1.2);
  -webkit-backdrop-filter: blur(20px) saturate(1.2);
}

/* Optional strip for calculator subfolders */
.mk-mini-brand {
  display: block;
  text-align: center;
  padding: 12px 16px;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--mk-text);
  background: rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(20px) saturate(var(--mk-sat));
  -webkit-backdrop-filter: blur(20px) saturate(var(--mk-sat));
  border-bottom: 1px solid rgba(255, 255, 255, 0.38);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.5) inset;
  text-decoration: none !important;
  transition: color var(--mk-duration) var(--mk-ease), background var(--mk-duration) var(--mk-ease);
}

.mk-mini-brand:hover {
  color: var(--mk-accent);
  background: rgba(255, 255, 255, 0.62);
}