:root {
  --ink: #070b16;
  --muted: #52678d;
  --soft-muted: #7a879d;
  --line: #d8e0ef;
  --page: #fff;
  --surface: #fff;
  --header-bg: rgba(255, 255, 255, 0.94);
  --header-line: #e5e9f1;
  --nav-ink: #17223a;
  --avatar-border: #fff;
  --section-alt: #f9f9f9;
  --warm-card: linear-gradient(125deg, #fff9ec 0%, #fffdf8 100%);
  --warm-card-wide: linear-gradient(125deg, #fff9ea 0%, #fffdf8 55%, #fff 100%);
  --warm-line: #f3dbac;
  --red: #ff1723;
  --red-dark: #ea101b;
  --gold: #f5a400;
  --cream: #fffaf0;
  --footer: #071e17;
  --footer-2: #0d2b22;
  --shadow: 0 18px 42px rgba(13, 26, 54, 0.08);
}

[data-theme="dark"] {
  --ink: #f5f7fb;
  --muted: #b6c2d7;
  --soft-muted: #9aa9c0;
  --line: #263450;
  --page: #070b16;
  --surface: #0d1424;
  --header-bg: rgba(7, 11, 22, 0.96);
  --header-line: #202a40;
  --nav-ink: #f5f7fb;
  --avatar-border: #303541;
  --section-alt: #101724;
  --warm-card: linear-gradient(125deg, #171827 0%, #101724 100%);
  --warm-card-wide: linear-gradient(125deg, #171827 0%, #101724 58%, #0d1424 100%);
  --warm-line: #3b3525;
  --footer: #040c09;
  --footer-2: #0a1d17;
  --shadow: 0 20px 46px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  interpolate-size: allow-keywords;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: "Poppins", Arial, sans-serif;
  font-weight: 400;
  line-height: 1.6em;
  letter-spacing: 0;
  transition: background-color 0.3s ease, color 0.3s ease;
}

body,
.site-header,
.main-nav,
.theme-toggle,
.hero-copy,
.limited,
.section-lede,
.problem-card,
.experience-card,
.testimonial-card,
.faq-item,
.solution-card,
.cta-card,
.question-panel,
.question-trigger,
.question-form input,
.question-form textarea,
.science-section .references,
.arrow,
.arrow.muted,
img {
  display: block;
  max-width: 100%;
}

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

button,
input,
textarea {
  font: inherit;
}

.container {
  width: min(100% - 64px, 1400px);
  margin-inline: auto;
}

.narrow {
  width: min(100% - 64px, 1400px);
}

.reading-width {
  width: min(100% - 64px, 1400px);
}

.section {
  padding: 88px 0;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1,
h2,
.btn,
.footer-grid h2 {
  font-weight: 700;
}

h1 {
  max-width: 1100px;
  font-size: clamp(3.25rem, 5vw, 5.35rem);
  font-weight: 600;
  line-height: 1.06;
  text-align: center;
  letter-spacing: -0.04em;
}

h2 {
  font-size: clamp(1.8rem, 4.4vw, 2.45rem);
  line-height: 0.98;
  letter-spacing: -0.045em;
}

h3 {
  font-size: 1.45rem;
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.035em;
}

.section-lede {
  margin-top: 18px;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.35vw, 1.35rem);
  font-weight: 300;
  line-height: 1.6em;
}

.btn {
  display: inline-flex;
  min-height: 62px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 0;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1.12rem;
  font-weight: 600;
  line-height: 1;
}

.btn::after {
  display: inline-block;
  font-family: "bootstrap-icons";
  font-size: 1.35em;
  font-style: normal;
  font-weight: 400;
  line-height: 0;
  content: "\f135";
  transform: translateY(1px);
}

.btn-red {
  min-width: 250px;
  background: linear-gradient(180deg, #ff1f29 0%, var(--red) 100%);
  color: #fff;
  box-shadow: 0 24px 34px rgba(255, 23, 35, 0.18);
}

.btn-dark {
  width: 100%;
  background: #070b16;
  color: #fff;
}

.site-header {
  z-index: 10;
  background-color: var(--header-bg);
  border-bottom: 0;
  backdrop-filter: blur(16px);
  transition:
    background-color 0.3s ease,
    color 0.3s ease,
    border-color 0.3s ease;
}

.nav-wrap {
  min-height: 112px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.logo-link img {
  width: 200px;
}

.main-nav {
  display: flex;
  justify-content: flex-end;
  gap: 40px;
  margin-left: auto;
  color: var(--nav-ink);
  font-size: 1rem;
  font-weight: 400;
  transition: color 0.3s ease;
}

.main-nav a {
  position: relative;
  padding: 42px 0 35px;
  font-weight: 400;
  transition: color 0.3s ease;
}

.main-nav .active::after {
  display: none;
  position: absolute;
  right: 0;
  bottom: 26px;
  left: 0;
  height: 2px;
  background: var(--red);
  content: "";
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.theme-toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  border: 0;
  background: transparent;
  color: var(--nav-ink);
  cursor: pointer;
  font-size: 1.4rem;
  padding: 0;
  transition: color 0.3s ease;
}

.mobile-menu-button {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  transition: color 0.3s ease;
}

.mobile-menu-button span {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
}

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 60;
  pointer-events: none;
  visibility: hidden;
}

.mobile-menu::before {
  position: absolute;
  inset: 0;
  background: rgba(4, 7, 15, 0.42);
  opacity: 0;
  content: "";
  transition: opacity 0.3s ease;
}

.mobile-menu-panel {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  background: var(--page);
  color: var(--ink);
  padding: 24px;
  transform: translateX(100%);
  transition: transform 0.3s ease, background-color 0.3s ease, color 0.3s ease;
}

.mobile-menu.is-open,
.mobile-menu.is-closing {
  visibility: visible;
}

.mobile-menu.is-open {
  pointer-events: auto;
}

.mobile-menu.is-closing {
  pointer-events: none;
}

.mobile-menu.is-open::before {
  opacity: 1;
}

.mobile-menu.is-open .mobile-menu-panel {
  transform: translateX(0);
}

.mobile-menu-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.mobile-menu-top img {
  width: 170px;
}

.mobile-menu-close {
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  font-size: 1.6rem;
  line-height: 1;
}

.mobile-menu-nav {
  display: grid;
  gap: 6px;
  margin-top: 54px;
}

.mobile-menu-nav a {
  display: flex;
  align-items: center;
  min-height: 62px;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  font-size: 1.2rem;
  font-weight: 400;
  letter-spacing: -0.035em;
}

.mobile-menu-actions {
  display: grid;
  gap: 24px;
  margin-top: auto;
  padding-top: 42px;
}

.mobile-menu-actions .btn {
  width: 100%;
}

.mobile-theme-toggle {
  justify-self: center;
}

.switch {
  width: 54px;
  height: 30px;
  border-radius: 999px;
  background: #cbd1dc;
  position: relative;
  transition: background-color 0.3s ease, background 0.3s ease;
}

.switch::before {
  position: absolute;
  top: 4px;
  left: 5px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #fff;
  content: "";
  transition: transform 0.3s ease, background-color 0.3s ease;
}

.sun,
.moon {
  transition: color 0.3s ease, opacity 0.3s ease;
}

[data-theme="dark"] .switch {
  background: #ff1723;
}

[data-theme="dark"] .switch::before {
  transform: translateX(22px);
}

[data-theme="dark"] .sun {
  opacity: 0.45;
}

[data-theme="dark"] .moon {
  color: #fff;
}

.hero {
  min-height: 720px;
  display: flex;
  align-items: center;
  padding-top: 60px;
  padding-bottom: 64px;
}

.hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.avatar-row {
  display: flex;
  margin-bottom: 24px;
}

.avatar-row img {
  width: 56px;
  height: 56px;
  margin-left: -14px;
  border: 5px solid var(--avatar-border);
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 3px 10px rgba(8, 13, 28, 0.12);
}

.avatar-row img:first-child {
  margin-left: 0;
}

.hero-copy {
  max-width: 705px;
  margin-top: 34px;
  color: var(--muted);
  font-size: 1.15rem;
  font-weight: 300;
  line-height: 1.6em;
  text-align: center;
}

.hero-btn {
  margin-top: 44px;
  min-width: 250px;
  min-height: 70px;
  font-size: 1.1rem;
  padding: 1.3rem;
}

.limited {
  display: flex;
  align-items: center;
  margin-top: 36px;
  color: var(--soft-muted);
  font-size: 0.9rem;
  font-weight: 300;
  opacity: 0.6;
}

.limited-icon {
  display: inline-flex;
  margin-right: 12px;
  vertical-align: -0.1em;
  line-height: 1;
}

.limited-text {
  display: inline-block;
}

.sound-section {
  background: var(--section-alt);
  padding-top: 76px;
}

.sound-section .section-lede {
  max-width: 790px;
}

.problem-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  margin-top: 34px;
}

.problem-grid::after {
  position: absolute;
  right: 18%;
  bottom: -42px;
  left: 11%;
  height: 42px;
  border-right: 2px dashed #a6b8d7;
  border-bottom: 2px dashed #a6b8d7;
  border-left: 2px dashed #a6b8d7;
  content: "";
}

.problem-card,
.experience-card,
.testimonial-card,
.faq-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.problem-card {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 16px;
  align-content: start;
  padding: 36px;
}

.problem-card:nth-child(2)::after {
  position: absolute;
  bottom: -42px;
  left: 50%;
  height: 42px;
  border-left: 2px dashed #a6b8d7;
  content: "";
}

.icon-bubble,
.solution-icon,
.cta-card li span {
  display: inline-flex;
  width: 54px;
  height: 54px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: #fff0cf;
  color: var(--gold);
  font-weight: 700;
}

.icon-bubble .bi,
.solution-icon .bi,
.cta-card li span .bi {
  font-size: 1.5rem;
  line-height: 1;
}

.problem-card .icon-bubble {
  width: 44px;
  height: 44px;
  align-self: center;
  background: #fff0cf;
}

.problem-card .icon-bubble .bi {
  font-size: 1.35rem;
}

.problem-card h3 {
  align-self: center;
  margin: 0;
  font-size: 1.2rem;
  line-height: 1.2;
}

.problem-card p,
.solution-card p,
.experience-card p,
.testimonial-card p,
.faq-item p,
.question-panel p,
.cta-card p,
.science-section p {
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1.6em;
}

.problem-card p {
  grid-column: 1 / -1;
  margin-top: 12px;
}

.solution-card {
  position: relative;
  width: 72%;
  margin-top: 82px;
  border: 1px solid var(--warm-line);
  border-radius: 8px;
  background: var(--warm-card);
  padding: 30px 48px 24px;
}

.solution-card::before {
  position: absolute;
  top: -42px;
  left: 15.28%;
  height: 42px;
  border-left: 2px dashed #a6b8d7;
  content: "";
}

.solution-icon {
  background: var(--red);
  color: #fff0cf;
}

.solution-card h3 {
  margin-top: 12px;
  color: var(--ink);
}

.solution-card p {
  margin-top: 8px;
  max-width: 800px;
}

.solution-card .btn {
  min-width: 264px;
  min-height: 54px;
  margin-top: 16px;
}

.science-section {
  padding-top: 88px;
  padding-bottom: 88px;
}

.science-section p {
  max-width: 1240px;
  margin-top: 36px;
  font-size: 1.1rem;
}

.science-section .references {
  margin-top: 44px;
  color: var(--soft-muted);
  font-size: clamp(0.95rem, 1.2vw, 1.15rem);
  font-weight: 300;
}

.experiences-section {
  background: var(--section-alt);
  padding-top: 82px;
}

.experience-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 38px 54px;
  margin-top: 42px;
}

.experience-card {
  display: grid;
  grid-template-columns: minmax(220px, 304px) 1fr;
  gap: 34px;
  align-items: flex-start;
  padding: 18px;
}

.experience-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: 8px;
  object-fit: cover;
}

.experience-card h3 {
  margin-top: 0.5em;
}

.experience-card p {
  margin-top: 10px;
  font-size: 1.02rem;
}

.social-section {
  overflow-x: clip;
  overflow-y: visible;
  padding-top: 88px;
  padding-bottom: 72px;
}

.testimonial-row {
  --testimonial-container-width: min(100vw - 64px, 1400px);
  --testimonial-bleed: calc((100vw - var(--testimonial-container-width)) / 2);
  --testimonial-card-width: calc((var(--testimonial-container-width) - 32px) / 3);
  display: flex;
  gap: 16px;
  margin-top: 34px;
  margin-left: calc(var(--testimonial-bleed) * -1);
  width: 100vw;
  overflow: visible;
  padding-left: var(--testimonial-bleed);
  padding-right: calc(var(--testimonial-bleed) + var(--testimonial-container-width) - var(--testimonial-card-width));
  padding-bottom: 34px;
  transition: transform 0.3s ease;
}

.testimonial-card {
  flex: 0 0 var(--testimonial-card-width);
  padding: 16px 16px 28px;
}

.video-button {
  display: block;
  width: 100%;
  border: 0;
  background: transparent;
  cursor: pointer;
  padding: 0;
  text-align: inherit;
}

.video-still {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border-radius: 8px;
}

.video-still::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 78px;
  height: 78px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: #fff;
  content: "";
}

.video-still::before {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 1;
  width: 0;
  height: 0;
  transform: translate(-35%, -50%);
  border-top: 14px solid transparent;
  border-bottom: 14px solid transparent;
  border-left: 20px solid #111;
  content: "";
}

.video-still img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
}

.inline-video-frame {
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border-radius: 8px;
  background: #070b16;
}

.inline-video-frame iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.testimonial-card h3 {
  margin-top: 26px;
  font-size: 1rem;
}

.testimonial-card p {
  margin-top: 4px;
  font-size: 1rem;
}

.slider-controls {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 24px;
  margin-top: 20px;
}

.arrows {
  display: flex;
  gap: 12px;
}

.arrow {
  width: 50px;
  height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  font-size: 2rem;
  line-height: 1;
}

.arrow.muted {
  border: 0;
  background: color-mix(in srgb, var(--surface) 82%, var(--page));
  color: var(--soft-muted);
  cursor: default;
}

.video-modal[hidden],
.book-modal[hidden] {
  display: none;
}

.video-modal,
.book-modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 24px;
}

.book-modal {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.book-modal.is-open,
.book-modal.is-closing {
  pointer-events: auto;
}

.book-modal.is-open {
  opacity: 1;
}

.video-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(4, 7, 15, 0.72);
  backdrop-filter: blur(10px);
}

.book-modal .video-modal-backdrop {
  opacity: 0;
  transition: opacity 0.3s ease;
}

.book-modal.is-open .video-modal-backdrop {
  opacity: 1;
}

.video-modal-card {
  position: relative;
  z-index: 1;
  width: min(100%, 940px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.34);
  padding: 18px;
}

.video-modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 2;
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  color: #070b16;
  cursor: pointer;
  font-size: 2rem;
  line-height: 1;
}

.book-modal .video-modal-close {
  background: #070b16;
  color: #fff0cf;
}

.modal-video-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border-radius: 8px;
  background: #070b16;
}

.modal-video-frame iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.book-modal-card {
  position: relative;
  z-index: 1;
  width: min(100%, 560px);
  border: 1px solid var(--warm-line);
  border-radius: 8px;
  background: var(--warm-card);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.34);
  padding: 42px;
  opacity: 0;
  transform: translateY(14px) scale(0.98);
  transition:
    opacity 0.3s ease,
    transform 0.3s ease,
    background-color 0.3s ease,
    border-color 0.3s ease;
}

.book-modal.is-open .book-modal-card {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.book-modal-card h2 {
  font-size: clamp(2.2rem, 4vw, 3.5rem);
}

.book-modal-card p {
  margin-top: 10px;
  color: var(--muted);
  font-size: 1.1rem;
}

.book-form {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.book-form label {
  display: grid;
  gap: 8px;
  color: var(--ink);
  font-size: 0.98rem;
  font-weight: 600;
}

.book-form input,
.book-form select {
  width: 100%;
  height: 54px;
  border: 1px solid #abc1df;
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  font-size: 1rem;
  padding: 0 16px;
}

.book-form select {
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--ink) 50%),
    linear-gradient(135deg, var(--ink) 50%, transparent 50%);
  background-position:
    calc(100% - 23px) 50%,
    calc(100% - 16px) 50%;
  background-size:
    7px 7px,
    7px 7px;
  background-repeat: no-repeat;
  padding-right: 46px;
}

.book-form .btn {
  width: 100%;
  margin-top: 8px;
}

.cta-section {
  padding-top: 0 !important;
  padding-bottom: 0 !important;
}

.cta-card {
  border: 1px solid var(--warm-line);
  border-radius: 8px;
  background: var(--warm-card-wide);
  padding: 76px 76px 60px;
}

.cta-card h2 {
  max-width: 980px;
}

.cta-card p {
  max-width: 740px;
  margin-top: 18px;
  font-size: 1rem;
}

.cta-card ul {
  display: grid;
  gap: 14px;
  margin: 30px 0 30px;
  padding: 0;
  color: var(--muted);
  font-size: 1rem;
  list-style: none;
}

.cta-card li {
  display: flex;
  align-items: center;
  gap: 18px;
}

.cta-card li span {
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  background: var(--red);
  color: #fff0cf;
}

.cta-card .btn {
  font-size: 1rem;
}

.faq-section {
  padding-top: 80px;
  padding-bottom: 90px;
}

.faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 430px;
  gap: 28px;
  align-items: start;
  margin-top: 34px;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  overflow: hidden;
  box-shadow: none;
}

.faq-item::details-content {
  block-size: 0;
  overflow: hidden;
  transition:
    block-size 0.3s ease,
    content-visibility 0.3s allow-discrete;
}

.faq-item[open]::details-content {
  block-size: auto;
}

.faq-item summary {
  position: relative;
  min-height: 74px;
  display: flex;
  align-items: center;
  padding: 0 72px 0 28px;
  cursor: pointer;
  color: var(--ink);
  font-size: 1.1rem;
  font-weight: 700;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  position: absolute;
  right: 34px;
  color: var(--ink);
  content: "+";
  font-size: 2rem;
  font-weight: 400;
  transition: color 0.3s ease;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item p {
  max-width: 850px;
  padding: 0 70px 30px 28px;
}

.question-panel {
  border: 1px solid var(--warm-line);
  border-radius: 8px;
  background: var(--warm-card);
  padding: 42px 34px 34px;
}

.question-panel h3 {
  max-width: 360px;
  font-size: 2.05rem;
}

.question-panel p {
  margin-top: 24px;
  font-size: 1rem;
}

.question-trigger {
  width: 100%;
  max-height: 70px;
  margin-top: 34px;
  border: 2px solid var(--ink);
  background: transparent;
  color: var(--ink);
  font-size: 1rem;
  overflow: hidden;
  transition:
    max-height 0.3s ease,
    min-height 0.3s ease,
    margin-top 0.3s ease,
    opacity 0.3s ease,
    color 0.3s ease,
    background-color 0.3s ease;
}

.question-trigger:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.question-form {
  display: grid;
  gap: 12px;
  max-height: 0;
  margin-top: 0;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  transition:
    max-height 0.3s ease,
    margin-top 0.3s ease,
    opacity 0.3s ease;
}

.question-panel.is-open .question-trigger {
  pointer-events: none;
}

.question-panel.is-open .question-form {
  max-height: 430px;
  margin-top: 22px;
  opacity: 1;
  pointer-events: auto;
}

.question-form label span {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.question-form input,
.question-form textarea {
  width: 100%;
  border: 1px solid #abc1df;
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  font-size: 1rem;
  outline: none;
}

.question-form input {
  height: 58px;
  padding: 0 18px;
}

.question-form textarea {
  min-height: 104px;
  padding: 16px 18px;
  resize: vertical;
}

.question-form ::placeholder {
  color: var(--soft-muted);
}

.question-form .btn {
  margin-top: 4px;
  font-size: 1rem;
}

.site-footer {
  overflow: hidden;
  background:
    radial-gradient(circle at 8% 14%, rgba(255, 255, 255, 0.07), transparent 24%),
    radial-gradient(circle at 65% 44%, rgba(255, 255, 255, 0.05), transparent 24%),
    linear-gradient(135deg, var(--footer) 0%, var(--footer-2) 50%, #061811 100%);
  color: #fff;
  font-size: 1rem;
  padding: 130px 0 82px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1.15fr 1.15fr;
  gap: 52px;
}

.footer-grid section + section {
  border-left: 1px solid rgba(255, 255, 255, 0.45);
  padding-left: 56px;
}

.footer-grid h2,
.footer-tag {
  font-size: 1rem;
  line-height: 1.2;
}

.footer-grid p,
.footer-grid a,
.contact-line {
  color: rgba(255, 255, 255, 0.92);
  font-size: 1rem;
  line-height: 1.6em;
}

.footer-grid p {
  margin-top: 34px;
}

.footer-grid nav {
  display: grid;
  gap: 8px;
  margin-top: 34px;
}

.social-icons {
  display: flex;
  gap: 18px;
  margin-top: 42px;
}

.social-icons a {
  width: 58px;
  height: 58px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  font-size: 1rem;
  font-weight: 700;
}

.social-icons .bi {
  line-height: 1;
}

address {
  display: grid;
  gap: 24px;
  margin-top: 34px;
  font-style: normal;
}

.contact-line {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 10px;
}

.contact-line i {
  color: #fff;
  font-size: 1rem;
  line-height: 1;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  margin-top: 68px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.55);
  color: rgba(255, 255, 255, 0.9);
  font-size: 1rem;
}

.footer-bottom div {
  display: flex;
  gap: 24px;
  align-items: center;
}

.footer-bottom span {
  width: 1px;
  height: 20px;
  background: rgba(255, 255, 255, 0.5);
}

@media (max-width: 1180px) {
  .container,
  .narrow,
  .reading-width {
    width: min(100% - 40px, 960px);
  }

  .nav-wrap {
    min-height: 88px;
    gap: 14px;
  }

  .main-nav {
    display: none;
  }

  .nav-actions {
    margin-left: auto;
  }

  .mobile-menu-button {
    display: inline-flex;
  }

  .hero {
    min-height: auto;
  }

  .problem-grid,
  .experience-grid,
  .faq-layout,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .problem-card {
    min-height: 0;
  }

  .problem-grid::after,
  .problem-card:nth-child(2)::after,
  .solution-card::before {
    display: none;
  }

  .solution-card {
    width: 100%;
    margin-top: 28px;
  }

  .testimonial-row {
    --testimonial-card-width: min(46%, 360px);
    padding-bottom: 10px;
  }

  .footer-grid section + section {
    border-left: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.35);
    padding-top: 30px;
    padding-left: 0;
  }
}

@media (max-width: 720px) {
  .container,
  .narrow,
  .reading-width {
    width: min(100% - 28px, 560px);
  }

  .section {
    padding: 72px 0;
  }

  h1 {
    font-size: clamp(3rem, 15vw, 4.7rem);
  }

  h2 {
    font-size: clamp(1.8rem, 4.4vw, 2.45rem);
  }

  h3 {
    font-size: 1.35rem;
  }

  .logo-link img {
    width: 150px;
  }

  .hero {
    padding-top: 36px;
  }

  .hero-copy,
  .section-lede,
  .science-section p {
    font-size: 1.15rem;
  }

  .hero-btn,
  .btn-red {
    width: 100%;
    min-width: 0;
  }

  .hero-btn {
    min-width: 250px;
  }

  .limited {
    justify-content: center;
    text-align: center;
  }

  .limited-text {
    max-width: 310px;
  }

  .avatar-row img {
    width: 48px;
    height: 48px;
  }

  .problem-card,
  .solution-card,
  .cta-card,
  .question-panel {
    padding: 26px 22px;
  }

  .experience-card {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .testimonial-row {
    --testimonial-card-width: 86%;
  }

  .cta-card li {
    align-items: flex-start;
    font-size: 1rem;
  }

  .faq-item summary {
    min-height: 66px;
    padding: 0 54px 0 18px;
    font-size: 1.12rem;
  }

  .faq-item summary::after {
    right: 20px;
  }

  .faq-item p {
    padding: 0 20px 22px 18px;
    font-size: 1rem;
  }

  .question-panel h3 {
    font-size: 1.8rem;
  }

  .book-modal {
    opacity: 1;
    padding: 0;
    place-items: stretch;
  }

  .book-modal .video-modal-backdrop {
    background: transparent;
    backdrop-filter: none;
  }

  .book-modal-card {
    width: 100%;
    min-height: 100dvh;
    border: 0;
    border-radius: 0;
    padding: 72px 22px 32px;
    opacity: 1;
    transform: translateY(100%);
  }

  .book-modal.is-open .book-modal-card {
    opacity: 1;
    transform: translateY(0);
  }

  .site-footer {
    padding: 76px 0 44px;
  }

  .footer-grid p,
  .footer-grid a,
  .contact-line {
    font-size: 1rem;
  }

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

  .footer-bottom div {
    flex-wrap: wrap;
  }
}

@media (max-width: 575px) {
  h1 {
    font-size: clamp(2rem, 8vw, 4.7rem);
  }
}

@media (max-width: 480px) {
  .nav-wrap {
    gap: 10px;
  }

  .logo-link img {
    width: 128px;
  }

  .site-header .theme-toggle {
    gap: 6px;
    font-size: 1.15rem;
  }

  .site-header .switch {
    width: 48px;
    height: 28px;
  }

  .site-header .switch::before {
    width: 20px;
    height: 20px;
  }

  [data-theme="dark"] .site-header .switch::before {
    transform: translateX(18px);
  }
}