:root {
  color-scheme: light;
  --bg: #f6f7fb;
  --bg-soft: #eef2f8;
  --panel: rgba(255, 255, 255, .74);
  --panel-strong: rgba(255, 255, 255, .9);
  --text: #111827;
  --muted: #667085;
  --line: rgba(17, 24, 39, .11);
  --primary: #155eef;
  --primary-2: #11a37f;
  --shadow: 0 24px 70px rgba(30, 41, 59, .14);
  --shadow-soft: 0 12px 38px rgba(30, 41, 59, .1);
  --radius-xl: 30px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --blur: blur(22px);
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #090d14;
  --bg-soft: #111827;
  --panel: rgba(18, 25, 38, .72);
  --panel-strong: rgba(22, 30, 45, .92);
  --text: #f7f9fc;
  --muted: #a6b0c2;
  --line: rgba(255, 255, 255, .12);
  --primary: #77a6ff;
  --primary-2: #48d6ad;
  --shadow: 0 30px 90px rgba(0, 0, 0, .38);
  --shadow-soft: 0 18px 46px rgba(0, 0, 0, .28);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 12%, rgba(21, 94, 239, .14), transparent 34%),
    radial-gradient(circle at 86% 4%, rgba(17, 163, 127, .13), transparent 30%),
    linear-gradient(135deg, var(--bg), var(--bg-soft));
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  letter-spacing: 0;
}

button, input, select { font: inherit; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }

.portal-page {
  width: min(100% - 32px, 1440px);
  margin: 0 auto;
  padding: 22px 0 96px;
}

.portal-topbar {
  position: sticky;
  top: 0;
  z-index: 70;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 6px 0 8px;
  background: linear-gradient(180deg, var(--bg) 76%, rgba(246, 247, 251, 0));
  backdrop-filter: var(--blur);
}

.portal-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  color: var(--text);
  font-weight: 950;
}

.portal-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  min-width: 40px;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  border-radius: 14px;
  box-shadow: 0 12px 28px rgba(21, 94, 239, .25);
  font-weight: 950;
}

.portal-brand-title {
  margin: 0;
  font-size: clamp(19px, 2.25vw, 32px);
  line-height: 1.08;
  font-weight: 950;
}

.portal-theme {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 9px 14px;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: var(--shadow-soft);
  backdrop-filter: var(--blur);
  font-weight: 850;
  white-space: nowrap;
}

.header-calculations-link {
  margin-left: auto;
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 15px;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  border-radius: 999px;
  box-shadow: 0 14px 28px rgba(21, 94, 239, .2);
  font-size: 14px;
  font-weight: 850;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.portal-nav {
  position: sticky;
  top: 56px;
  z-index: 65;
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  margin: 0 0 16px;
  padding: 8px 0 12px;
  background: linear-gradient(180deg, var(--bg) 72%, rgba(246, 247, 251, 0));
  backdrop-filter: var(--blur);
  scrollbar-width: none;
}
.portal-nav::-webkit-scrollbar { display: none; }
.portal-nav a {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 9px 14px;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: var(--shadow-soft);
  font-size: 14px;
  font-weight: 900;
  line-height: 1;
}
.portal-nav a[aria-current="page"] {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  border-color: transparent;
}

.portal-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr) 280px;
  gap: 18px;
  align-items: start;
}

.portal-left,
.portal-right {
  position: sticky;
  top: 120px;
  display: grid;
  gap: 14px;
  align-self: start;
  padding-right: 2px;
}

.portal-right {
  max-height: calc(100vh - 132px);
  overflow: auto;
}

.portal-main { display: grid; gap: 14px; min-width: 0; }

.portal-card,
.portal-side-card,
.portal-calculator,
.portal-result-card,
.portal-footer {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
  backdrop-filter: var(--blur);
}

.portal-card,
.portal-calculator {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}

.portal-card { padding: clamp(20px, 3vw, 34px); }
.portal-calculator { display: grid; gap: 12px; padding: 16px; }
.portal-side-card { padding: 15px; border-radius: var(--radius-lg); }
.portal-footer { margin-top: 18px; padding: 18px 20px; border-radius: var(--radius-lg); }

.portal-eyebrow {
  display: inline-flex;
  width: fit-content;
  margin: 0 0 12px;
  padding: 7px 11px;
  color: var(--primary);
  background: rgba(21, 94, 239, .09);
  border: 1px solid rgba(21, 94, 239, .16);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 900;
}

.portal-card h1 {
  margin: 0 0 10px;
  font-size: clamp(34px, 5.2vw, 62px);
  line-height: .98;
  font-weight: 950;
}
.portal-card h2,
.portal-section h2,
.portal-side-card h2 {
  margin: 0 0 10px;
  font-size: clamp(21px, 2.4vw, 30px);
  line-height: 1.1;
  font-weight: 950;
}
.portal-side-card h2 { font-size: 20px; }
.portal-card p,
.portal-card li,
.portal-section p,
.portal-section li {
  color: var(--muted);
  line-height: 1.62;
}

.portal-section {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
  backdrop-filter: var(--blur);
}

.portal-list { display: grid; gap: 7px; }
.portal-list a,
.portal-list button {
  display: grid;
  gap: 2px;
  width: 100%;
  min-height: 40px;
  padding: 8px 10px;
  color: var(--text);
  text-align: left;
  background: var(--panel-strong);
  border: 1px solid var(--line);
  border-radius: 14px;
  font-size: 13px;
  font-weight: 850;
}
.portal-list small { color: var(--muted); font-size: 11px; font-weight: 720; }

.portal-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.portal-field { display: grid; gap: 6px; color: var(--muted); font-size: 13px; font-weight: 850; }
.portal-field input,
.portal-field select {
  width: 100%;
  min-height: 48px;
  padding: 11px 14px;
  color: var(--text);
  background: var(--panel-strong);
  border: 1px solid var(--line);
  border-radius: 16px;
  outline: none;
  font-weight: 900;
}
.portal-field input { font-size: 21px; line-height: 1.1; }
.portal-field input:focus,
.portal-field select:focus {
  border-color: rgba(21, 94, 239, .55);
  box-shadow: 0 0 0 4px rgba(21, 94, 239, .12);
}

.portal-modes,
.portal-actions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 8px;
}

.portal-btn,
.portal-mode,
.copy-value-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 9px 12px;
  color: var(--text);
  background: var(--panel-strong);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-weight: 900;
  line-height: 1.05;
  text-align: center;
}
.portal-btn.primary,
.portal-mode.active {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  border-color: transparent;
}
.portal-btn.is-done,
.portal-mode.is-done,
.copy-value-btn.is-done,
.copy.is-done,
.action-btn.is-done,
.copy-btn.is-done {
  color: #fff !important;
  background: linear-gradient(135deg, var(--primary-2), var(--primary)) !important;
  border-color: transparent !important;
}

.portal-results {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}
.portal-result-card {
  display: grid;
  gap: 8px;
  min-height: 92px;
  padding: 13px;
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, var(--panel-strong), rgba(255, 255, 255, .68));
}
.portal-result-card span { color: var(--muted); font-size: 12px; font-weight: 850; }
.portal-result-value {
  color: var(--text);
  font-size: clamp(21px, 2.5vw, 30px);
  line-height: 1.04;
  font-weight: 950;
  word-break: break-word;
}
.portal-result-value.primary { color: var(--primary); }
.portal-result-value.green { color: var(--primary-2); }
.copy-value-btn { min-height: 30px; padding: 6px 9px; font-size: 12px; }

.portal-note { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.42; }
.portal-footer-nav { display: flex; flex-wrap: wrap; gap: 10px; }
.portal-footer a { color: var(--muted); font-size: 13px; font-weight: 850; }

.portal-toast {
  position: fixed;
  left: 50%;
  bottom: 22px;
  z-index: 140;
  transform: translateX(-50%) translateY(16px);
  opacity: 0;
  padding: 12px 16px;
  color: #fff;
  background: #111827;
  border-radius: 999px;
  font-weight: 900;
  transition: .2s;
}
.portal-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

.site-save-btn,
.bookmark-btn {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 130;
  display: inline-grid;
  grid-auto-flow: row;
  place-items: center;
  gap: 2px;
  min-height: 54px;
  max-width: min(320px, calc(100vw - 28px));
  padding: 9px 16px;
  color: #fff !important;
  border: 0 !important;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2)) !important;
  box-shadow: 0 18px 44px rgba(21, 94, 239, .28) !important;
  font: 900 14px/1.15 Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  cursor: pointer;
}

.site-save-btn small {
  display: none;
  font-size: 11px;
  font-weight: 750;
  opacity: .82;
}

.site-save-btn .save-main {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.site-save-tip {
  position: fixed;
  right: 18px;
  bottom: 84px;
  z-index: 131;
  display: none;
  max-width: min(360px, calc(100vw - 28px));
  padding: 12px 14px;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
  backdrop-filter: var(--blur);
  font-size: 13px;
  font-weight: 800;
}

.site-save-tip.show { display: block; }
body.app-installed .site-save-btn { display: none; }

.cookie-notice {
  position: fixed;
  left: 50%;
  bottom: 96px;
  z-index: 120;
  display: none;
  width: min(720px, calc(100vw - 24px));
  padding: 14px;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
  backdrop-filter: var(--blur);
  transform: translateX(-50%);
}

.cookie-notice.show { display: block; }
.cookie-notice-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
}
.cookie-notice p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}
.cookie-notice a { color: var(--primary); font-weight: 850; }
.cookie-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 7px; }
.cookie-btn {
  min-height: 34px;
  padding: 7px 12px;
  color: var(--text);
  background: rgba(127, 139, 161, .1);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 850;
}
.cookie-btn.primary {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  border-color: transparent;
}

.cookie-notice { bottom: 96px !important; }

@media (max-width: 980px) {
  .portal-layout { grid-template-columns: 1fr; }
  .portal-left { position: static; order: 2; max-height: none; overflow: visible; padding-right: 0; }
  .portal-right { position: static; order: 3; max-height: none; overflow: visible; padding-right: 0; }
  .portal-main { order: 1; }
}

@media (max-width: 640px) {
  .portal-page { width: min(100% - 18px, 720px); padding: 10px 0 94px; }
  .portal-topbar { top: 0; gap: 10px; padding: 4px 0 6px; }
  .portal-brand-title { font-size: clamp(18px, 5.4vw, 23px); }
  .portal-mark { width: 38px; height: 38px; min-width: 38px; border-radius: 13px; }
  .header-calculations-link { min-height: 38px; padding: 8px 10px; font-size: 12px; }
  .portal-theme { min-height: 38px; padding: 8px 10px; font-size: 12px; }
  .portal-theme .theme-text { display: none; }
  .portal-nav { top: 48px; gap: 6px; margin-bottom: 10px; padding: 6px 0 10px; }
  .portal-nav a { min-height: 32px; padding: 7px 10px; font-size: 12px; }
  .portal-card, .portal-calculator, .portal-section { padding: 14px; border-radius: 22px; }
  .portal-card h1 { font-size: clamp(29px, 9.5vw, 44px); }
  .portal-fields { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 7px; }
  .portal-field { gap: 4px; font-size: 11.5px; }
  .portal-field input, .portal-field select { min-height: 42px; padding: 9px 10px; border-radius: 14px; }
  .portal-field input { font-size: 17px; }
  .portal-results { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 6px; }
  .portal-result-card { min-height: 78px; padding: 9px 8px; border-radius: 15px; }
  .portal-result-card span { font-size: 10.5px; }
  .portal-result-value { font-size: clamp(15px, 4.6vw, 20px); }
  .portal-actions { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 7px; }
  .portal-btn { min-height: 38px; padding: 9px 8px; font-size: 12px; }
  .portal-footer { border-radius: 20px; padding: 15px; }
  .portal-footer-nav { display: grid; grid-template-columns: 1fr; }
  .site-save-btn {
    left: 12px;
    right: 12px;
    bottom: 12px;
    width: auto;
    min-height: 62px;
  }
  .site-save-btn small { display: block; }
  .site-save-tip {
    left: 12px;
    right: 12px;
    bottom: 84px;
    max-width: none;
  }
  .cookie-notice {
    bottom: 92px;
    padding: 12px;
    border-radius: 18px;
  }
  .cookie-notice-inner { grid-template-columns: 1fr; }
  .cookie-actions { justify-content: stretch; }
  .cookie-btn { flex: 1 1 auto; }
}

@media (max-width: 360px) {
  .portal-fields, .portal-results, .portal-actions { grid-template-columns: 1fr; }
  .portal-result-card { min-height: auto; }
  .portal-result-value { font-size: 22px; }
}