/* Homepage refinements and responsive calculator layout. */

body {
  overflow-x: hidden;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.calculator-results[hidden] {
  display: none;
}

.calculator:has(.calculator-results[hidden]) {
  grid-template-columns: 1fr;
}

.calculator:has(.calculator-results[hidden]) .calculator-form {
  border-right: 0;
}

/* Minimal header */
.download-nav {
  gap: 16px;
}

.download-nav .nav-links {
  order: 2;
  margin-left: auto;
}

.download-nav .header-download {
  order: 3;
}

.download-nav .nav-links a:not(.language-link) {
  display: none;
}

/* Calculator title + explanation popover */
.calculator-title-row {
  display: flex;
  align-items: flex-end;
  gap: 12px;
}

.calculator-title-row h1 {
  margin-bottom: 0;
}

.info-button {
  flex: 0 0 auto;
  width: 36px;
  height: 36px;
  min-height: 36px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1;
}

.info-button:hover {
  border-color: var(--accent);
  color: var(--ink);
}

.calculator-info-popover {
  width: min(520px, calc(100% - 32px));
  max-height: min(80vh, 620px);
  margin: auto;
  padding: 26px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--panel-strong);
  color: var(--muted);
  box-shadow: var(--shadow);
}

.calculator-info-popover::backdrop {
  background: rgba(4, 8, 9, 0.72);
  backdrop-filter: blur(3px);
}

.calculator-info-popover h2 {
  margin: 0 42px 16px 0;
  color: var(--ink);
  font-size: 1.45rem;
}

.calculator-info-popover p {
  margin: 0 0 14px;
}

.calculator-info-popover p:last-child {
  margin-bottom: 0;
}

.info-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 36px;
  height: 36px;
  min-height: 36px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  color: var(--ink);
  cursor: pointer;
  font-size: 1.35rem;
  line-height: 1;
}

/* Simple app CTA */
.app-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 32px;
  align-items: center;
  padding-top: 44px;
  padding-bottom: 44px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.app-cta h2 {
  margin: 0;
  font-size: clamp(1.55rem, 3vw, 2.25rem);
}

.app-cta .button-primary {
  padding: 11px 16px;
  white-space: nowrap;
}

/* Native details/summary accordions */
.accordion-shell {
  padding-top: 16px;
  padding-bottom: 60px;
}

.info-accordion {
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.info-accordion summary {
  position: relative;
  padding: 24px 42px 24px 0;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
  font-size: 1.03rem;
  font-weight: 700;
}

.info-accordion summary::-webkit-details-marker {
  display: none;
}

.info-accordion summary::after {
  position: absolute;
  top: 50%;
  right: 4px;
  content: "+";
  color: var(--muted);
  font-size: 1.45rem;
  font-weight: 400;
  line-height: 1;
  transform: translateY(-50%);
}

.info-accordion[open] summary::after {
  content: "−";
}

.info-accordion summary:hover,
.info-accordion[open] summary {
  color: var(--accent);
}

.accordion-content {
  max-width: 760px;
  padding: 0 42px 26px 0;
  color: var(--muted);
}

.accordion-content p {
  margin: 0 0 14px;
}

.accordion-content p:last-child {
  margin-bottom: 0;
}

.accordion-content a {
  color: var(--accent);
  text-underline-offset: 4px;
}

.minimal-footer {
  padding-top: 30px;
  padding-bottom: 38px;
}

@media (max-width: 820px) {
  .calculator-wrap {
    padding-bottom: 50px;
  }

  .calculator-results {
    min-height: 220px;
  }

  .calculator-results::before,
  .calculator-results::after {
    opacity: 0.85;
  }

  .app-cta {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

@media (max-width: 560px) {
  .shell {
    width: calc(100% - 32px);
  }

  .site-header {
    background: rgba(16, 22, 23, 0.97);
  }

  .download-nav {
    display: flex;
    min-height: 62px;
    gap: 9px;
    padding-top: 7px;
    padding-bottom: 7px;
  }

  .download-nav .brand {
    flex: 0 1 auto;
    gap: 8px;
    min-width: 0;
    font-size: 0.96rem;
  }

  .download-nav .brand img {
    width: 31px;
    height: 31px;
    border-radius: 9px;
  }

  .download-nav .nav-links {
    flex: 0 0 auto;
    width: auto;
    margin-left: auto;
    font-size: 0.76rem;
  }

  .download-nav .language-link {
    min-height: 34px;
    display: inline-flex;
    align-items: center;
    padding: 5px 8px;
    white-space: nowrap;
  }

  .download-nav .header-download {
    flex: 0 0 auto;
    margin-left: 0;
    min-height: 38px;
    padding: 7px 11px;
    border-radius: 10px;
    font-size: 0.84rem;
  }

  .intro.calculator-intro {
    padding: 28px 0 14px;
  }

  .calculator-title-row {
    gap: 10px;
  }

  .calculator-intro h1 {
    margin: 0;
    font-size: 1.875rem;
    line-height: 1.1;
  }

  .info-button {
    width: 33px;
    height: 33px;
    min-height: 33px;
  }

  .calculator-info-popover {
    width: calc(100% - 32px);
    padding: 22px 20px;
    border-radius: 18px;
    font-size: 0.94rem;
    line-height: 1.55;
  }

  .calculator-info-popover h2 {
    font-size: 1.3rem;
  }

  .calculator-intro + .calculator-wrap {
    padding-top: 12px;
    padding-bottom: 48px;
  }

  .calculator {
    display: block;
    overflow: visible;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
  }

  .calculator-form,
  .calculator-results,
  .field-grid,
  .field {
    min-width: 0;
    max-width: 100%;
  }

  .calculator-form,
  .calculator-results {
    border: 1px solid var(--line);
    border-radius: 18px;
  }

  .calculator-form {
    overflow: hidden;
    padding: 26px 22px 24px;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: var(--panel);
  }

  .calculator h2 {
    margin-bottom: 0;
    font-size: 1.375rem;
    line-height: 1.35;
  }

  .calculator-form .field-grid {
    margin-top: 26px;
  }

  .field input,
  .field input[type="date"] {
    display: block;
    inline-size: 100%;
    width: 100%;
    max-inline-size: 100%;
    max-width: 100%;
    min-inline-size: 0;
    min-width: 0;
    -webkit-min-logical-width: 0;
    min-height: 52px;
    padding-block: 0;
    padding-inline: 0;
    border-radius: 11px;
    font-size: 1rem;
    box-sizing: border-box;
  }

  .calculate-button {
    min-height: 52px;
    margin-top: 20px;
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 1rem;
  }

  .form-error {
    margin-top: 12px;
    font-size: 0.86rem;
  }

  .calculator-results {
    overflow: hidden;
    min-height: 0;
    margin-top: 18px;
    padding: 22px;
    align-items: flex-start;
    border-bottom: 1px solid var(--line);
    background: var(--panel-strong);
  }

  .calculator-results::before,
  .calculator-results::after {
    display: block;
  }

  .result-content {
    width: 100%;
  }

  .day-number {
    font-size: clamp(4rem, 20vw, 6rem);
  }

  .next-milestone {
    margin-top: 22px;
    padding-top: 20px;
  }

  .app-cta {
    gap: 22px;
    padding-top: 42px;
    padding-bottom: 42px;
  }

  .app-cta h2 {
    font-size: 1.55rem;
    line-height: 1.15;
  }

  .app-cta .button-primary {
    width: fit-content;
    min-height: 46px;
    padding: 10px 15px;
    font-size: 0.92rem;
  }

  .accordion-shell {
    padding-top: 18px;
    padding-bottom: 44px;
  }

  .info-accordion summary {
    padding: 25px 38px 25px 0;
    font-size: 1rem;
  }

  .info-accordion summary::after {
    right: 2px;
    font-size: 1.3rem;
  }

  .accordion-content {
    padding: 0 28px 25px 0;
    font-size: 0.92rem;
    line-height: 1.56;
  }

  .minimal-footer {
    padding-top: 28px;
    padding-bottom: 34px;
  }

  .minimal-footer .footer-grid {
    display: grid;
    gap: 18px;
  }
}

@media (max-width: 360px) {
  .download-nav .brand span {
    display: none;
  }
}

@media (max-width: 820px) and (orientation: landscape) {
  .calculator-wrap.shell {
    width: min(720px, calc(100% - 64px));
  }
}