/* ============================================================
   DiagnosIA — AI Early Medical Diagnosis
   Custom CSS — Light theme, Figma design system
   ============================================================ */

/* Fonts */
@font-face {
  font-family: 'InterTight';
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  src: url('../t/images/mosaic/fonts/InterTight-400-normal-1.ttf') format('truetype');
}
@font-face {
  font-family: 'InterTight';
  font-weight: 500;
  font-style: normal;
  font-display: swap;
  src: url('../t/images/mosaic/fonts/InterTight-500-normal-1.ttf') format('truetype');
}

/* ============================================================
   Design tokens — Figma UI Styles
   Colors: White-100 #F9F9F9, Gray-100 #FAFAFA, Gray-200 #F1F1EF,
           Light sage #E0F4E1, Light orange #F8ECE1, Light pink #F5E7EE,
           Orange #F84600, Black #202020
   Font: Inter Tight — Desktop H1 61px, H2 48px, H3-m 38px, H3-s 24px
                       Mobile  H1 44px, H2 38px, H3-m 30px, H3-s 20px
   ============================================================ */
:root {
  --brand: #F84600;
  --brand-dark: #cc3a00;
  --text: #202020;
  --text-muted: rgba(32, 32, 32, 0.5);
  --on-dark: #ffffff;
  --on-dark-muted: rgba(255, 255, 255, 0.65);
  --bg: #ffffff;
  --bg-100: #F9F9F9;
  --bg-alt: #F1F1EF;
  --bg-card: #FAFAFA;
  --bg-card-hover: #EAEAE4;
  --bg-dark: #111111;
  --border: rgba(32, 32, 32, 0.1);
  --border-strong: rgba(32, 32, 32, 0.2);
  --font: 'InterTight', system-ui, -apple-system, sans-serif;
  --container: 80rem;
  --radius: 0.75rem;
  --radius-lg: 1.5rem;
  --transition: 250ms ease;
}

/* Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
svg,
picture {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

input,
textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

ul {
  list-style: none;
}

h1, h2, h3, h4 {
  font-weight: 400;
  line-height: 1.1;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 2.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  background: var(--brand);
  color: var(--on-dark);
  font-size: 1rem;
  font-weight: 500;
  line-height: 1;
  border-radius: 6.25rem;
  transition: background var(--transition), transform var(--transition);
  white-space: nowrap;
}

.btn:hover {
  background: var(--brand-dark);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

/* Section base */
.section__title {
  font-size: 3rem;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.01em;
}

/* ============================================================
   Navbar
   ============================================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.5rem 0;
  background: rgba(255, 255, 255, 0.7);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  border-bottom-color: var(--border);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.navbar__logo {
  display: block;
  width: 8.75rem;
  height: auto;
}

.navbar__logo svg {
  width: 100%;
  height: auto;
}

.navbar__links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.navbar__links a {
  font-size: 0.9375rem;
  color: var(--text);
  opacity: 0.7;
}

.navbar__links a:hover {
  color: var(--brand);
  opacity: 1;
}

.navbar__cta {
  margin-left: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
}

.navbar__toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  align-items: center;
  justify-content: center;
  color: var(--text);
}

.navbar__toggle .icon-close {
  display: none;
}

.navbar__toggle.open .icon-menu {
  display: none;
}

.navbar__toggle.open .icon-close {
  display: block;
}

/* ============================================================
   Hero — light theme, DNA image right, white gradient left
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8.75rem 0 5rem;
  overflow: hidden;
  background: var(--bg);
}

.hero__bg {
  position: absolute;
  inset: -20%;
  z-index: 0;
  will-change: transform;
}

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

/* White gradient: text area stays readable, DNA visible on right */
.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg,
    rgba(255, 255, 255, 1)   0%,
    rgba(255, 255, 255, 0.9) 35%,
    rgba(255, 255, 255, 0.4) 60%,
    rgba(255, 255, 255, 0)   80%
  );
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: 40rem;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

/* Figma: H1 desktop 61px / 100% lh / -1% ls */
.hero__title {
  font-size: 3.8125rem;
  line-height: 1.0;
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--text);
}

/* Figma: Body-medium 18px / 120% lh */
.hero__text {
  font-size: 1.125rem;
  line-height: 1.4;
  color: var(--text-muted);
  max-width: 32.5rem;
}

.hero__cta {
  margin-top: 0.5rem;
  align-self: flex-start;
}

/* ============================================================
   How It Works (Swiper)
   ============================================================ */
.how {
  background: var(--bg);
  padding: 6.25rem 0;
  overflow: hidden;
}

.how__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 4rem;
}

.how__nav {
  display: flex;
  gap: 0.75rem;
}

.how__arrow {
  width: 3.5rem;
  height: 3.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6.25rem;
  background: var(--bg-alt);
  color: var(--text);
  transition: background var(--transition), color var(--transition), transform var(--transition);
  cursor: pointer;
}

.how__arrow:hover {
  background: var(--brand);
  color: var(--on-dark);
}

.how__arrow svg {
  width: 1.375rem;
  height: 0.8125rem;
}

.how__arrow--prev svg {
  transform: rotate(0deg);
}

.how__arrow--next svg {
  transform: rotate(180deg);
}

.how .swiper {
  overflow: visible;
  padding-bottom: 1.5rem;
}

.how .swiper-slide {
  width: min(100%, 68.75rem);
  height: auto;
}

/* Figma: H3-medium 38px for slide titles */
.slide {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background: var(--bg-100);
  border-radius: var(--radius-lg);
  overflow: hidden;
  height: 34rem;
  border: 1px solid var(--border);
}

.slide__content {
  padding: 3.5rem 3rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  justify-content: space-between;
}

.slide__title {
  font-size: 2.375rem;
  line-height: 1.1;
  font-weight: 400;
  letter-spacing: -0.01em;
}

.slide__text {
  font-size: 1.0625rem;
  line-height: 1.5;
  color: var(--text-muted);
  max-width: 28.75rem;
}

.slide__link {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.9375rem;
  color: var(--text);
  align-self: flex-start;
  padding: 0.75rem 1.375rem;
  border: 1px solid var(--border-strong);
  border-radius: 6.25rem;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.slide__link:hover {
  background: var(--brand);
  border-color: var(--brand);
  color: var(--on-dark);
}

.slide__link svg {
  width: 1.25rem;
  height: 0.6875rem;
}

.slide__media {
  position: relative;
  overflow: hidden;
}

.slide__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ============================================================
   Symptoms
   ============================================================ */
.symptoms {
  background: var(--bg-100);
  padding: 5rem 0;
}

.symptoms__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 4rem;
  flex-wrap: wrap;
}

.symptoms__display {
  font-size: clamp(5rem, 14vw, 12.5rem);
  font-weight: 400;
  line-height: 0.85;
  color: var(--brand);
  letter-spacing: -0.04em;
}

.symptoms__title-wrap {
  flex: 1;
  min-width: 16.25rem;
  max-width: 37.5rem;
}

.symptoms__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.symptom-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-height: 16.25rem;
  transition: transform var(--transition), border-color var(--transition);
}

.symptom-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-4px);
}

/* Figma: H3-s 24px */
.symptom-card__title {
  font-size: 1.5rem;
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: 0;
}

.symptom-card__text {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.5;
  flex: 1;
}

.symptom-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--brand);
  align-self: flex-start;
  margin-top: auto;
}

.symptom-card__link:hover {
  color: var(--brand-dark);
}

/* ============================================================
   Cases
   ============================================================ */
@keyframes casesBgKenBurns {
  from { transform: scale(1); }
  to   { transform: scale(1.08); }
}

@keyframes caseCardFloat {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-0.5rem); }
}

.cases {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 44rem;
  overflow: hidden;
}

.cases__left {
  background: #F5ECE1;
  display: flex;
  align-items: center;
  padding: 6rem 4.5rem;
}

.cases__left-inner {
  max-width: 28rem;
}

.cases__display {
  font-size: clamp(3rem, 5.2vw, 6rem);
  font-weight: 400;
  line-height: 1;
  color: var(--text);
  letter-spacing: -0.04em;
  margin-bottom: 1rem;
  opacity: 0;
  transform: translateY(2rem);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.cases__title {
  font-size: clamp(1.25rem, 1.8vw, 1.875rem);
  font-weight: 400;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 1.5rem;
  opacity: 0;
  transform: translateY(2rem);
  transition: opacity 0.8s ease 0.15s, transform 0.8s ease 0.15s;
}

.cases__sub {
  font-size: 0.9375rem;
  color: var(--text-muted, #666);
  line-height: 1.65;
  opacity: 0;
  transform: translateY(2rem);
  transition: opacity 0.8s ease 0.3s, transform 0.8s ease 0.3s;
}

.cases.in-view .cases__display,
.cases.in-view .cases__title,
.cases.in-view .cases__sub {
  opacity: 1;
  transform: translateY(0);
}

.cases__right {
  position: relative;
  overflow: hidden;
}

.cases__bg {
  position: absolute;
  inset: 0;
}

.cases__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  will-change: transform;
  animation: casesBgKenBurns 18s ease-in-out infinite alternate;
}

.cases__right::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,15,20,0.55) 0%, rgba(15,15,20,0.3) 100%);
  z-index: 1;
}

.cases__cards {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.375rem;
  padding: 4.5rem 3rem 4.5rem 0;
}

.case-card {
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--text);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  width: 78%;
  will-change: transform, opacity;
  opacity: 0;
  transform: translateX(3.5rem);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.case-card--1 { align-self: flex-start; margin-left: 3.5rem; transition-delay: 0.25s; }
.case-card--2 { align-self: flex-start; margin-left: 1rem;   transition-delay: 0.45s; }
.case-card--3 { align-self: flex-start; margin-left: 4.5rem; transition-delay: 0.65s; }

.cases.in-view .case-card {
  opacity: 1;
  transform: translateX(0);
}

.cases.in-view .case-card--1 { animation: caseCardFloat 4.2s ease-in-out 1.1s infinite; }
.cases.in-view .case-card--2 { animation: caseCardFloat 5.1s ease-in-out 1.3s infinite; }
.cases.in-view .case-card--3 { animation: caseCardFloat 4.7s ease-in-out 1.6s infinite; }

/* ============================================================
   Blog
   ============================================================ */
.blog {
  background: var(--bg-100);
  padding: 5rem 0;
}

.blog__head {
  margin-bottom: 4rem;
}

.blog__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  margin-top: 1.875rem;
}

.blog__tab {
  padding: 0.625rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: 6.25rem;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.875rem;
  transition: all var(--transition);
  cursor: pointer;
}

.blog__tab:hover {
  color: var(--text);
  border-color: var(--border-strong);
}

.blog__tab.active {
  background: var(--brand);
  border-color: var(--brand);
  color: var(--on-dark);
}

.blog__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.blog-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}

.blog-card:hover {
  box-shadow: 0 4px 24px rgba(32, 32, 32, 0.08);
  transform: translateY(-4px);
}

.blog-card__media {
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg-alt);
}

.blog-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 400ms ease;
}

.blog-card:hover .blog-card__media img {
  transform: scale(1.04);
}

.blog-card__body {
  padding: 1.25rem 1.75rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  flex: 1;
}

.blog-card__date {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.blog-card__title {
  font-size: 1.25rem;
  font-weight: 400;
  line-height: 1.25;
  color: var(--text);
}

.blog-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--brand);
  margin-top: auto;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity var(--transition), transform var(--transition);
}

.blog-card:hover .blog-card__link {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   FAQ
   ============================================================ */
.faq {
  background: var(--bg-alt);
  padding: 5rem 0;
}

.faq__layout {
  display: flex;
  gap: 5rem;
  align-items: flex-start;
}

.faq__sidebar {
  flex: 0 0 25rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  position: sticky;
  top: 7.5rem;
}

.faq__count {
  font-size: clamp(4rem, 8vw, 7.5rem);
  font-weight: 400;
  color: var(--brand);
  line-height: 1;
  letter-spacing: -0.03em;
}

.faq__list {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-width: 0;
}

.faq__item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition);
}

.faq__item:hover {
  border-color: var(--border-strong);
}

.faq__item.open {
  border-color: var(--border-strong);
}

/* Figma: Body-medium 18px / 120% lh */
.faq__question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem 1.75rem;
  font-size: 1.125rem;
  font-weight: 400;
  text-align: left;
  color: var(--text);
}

.faq__icon {
  width: 1.5rem;
  height: 1.5rem;
  flex-shrink: 0;
  color: var(--text-muted);
  transition: transform 300ms ease, color 300ms ease;
}

.faq__icon svg {
  width: 100%;
  height: 100%;
}

.faq__icon path {
  fill: currentColor;
}

.faq__item.open .faq__icon {
  transform: rotate(45deg);
  color: var(--brand);
}

.faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 350ms ease;
}

.faq__item.open .faq__answer {
  max-height: 25rem;
}

.faq__answer-inner {
  padding: 0 1.75rem 1.5rem;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--text-muted);
}

/* ============================================================
   CTA
   ============================================================ */
.cta {
  background: var(--bg-100);
  padding: 7.5rem 0;
  position: relative;
  overflow: hidden;
}

.cta__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  text-align: center;
  position: relative;
  z-index: 3;
}

.cta__title {
  font-size: clamp(2.375rem, 5.5vw, 5rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.02em;
  max-width: 45rem;
  color: var(--text);
}

.cta__bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 0;
  pointer-events: none;
}

.cta__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 60%;
  will-change: transform;
  transform: translateY(100%);
  transition: transform 1.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.cta__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(249,249,249,0.92) 0%,
    rgba(249,249,249,0.72) 50%,
    rgba(249,249,249,0.88) 100%
  );
}

.cta.in-view .cta__bg img {
  transform: translateY(0);
}

.cta__decor {
  position: absolute;
  right: -5rem;
  bottom: -2.5rem;
  width: 20rem;
  opacity: 0.08;
  z-index: 2;
  pointer-events: none;
  will-change: transform;
}

.cta__decor img {
  width: 100%;
  height: auto;
}

/* ============================================================
   Footer — curtain reveal on scroll
   ============================================================ */
.footer-curtain {
  position: relative;
  clip-path: inset(0);
  /* height synced to .footer via JS */
}

.footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-dark);
  padding: 2.5rem 0 0;
  border-top: 2px solid var(--brand);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 4rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer__col {
  opacity: 0;
  transform: translateY(1.5rem);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.footer.in-view .footer__col:nth-child(1) { opacity: 1; transform: none; }
.footer.in-view .footer__col:nth-child(2) { opacity: 1; transform: none; transition-delay: 0.15s; }
.footer.in-view .footer__col:nth-child(3) { opacity: 1; transform: none; transition-delay: 0.3s; }

.footer__logo {
  width: 8.125rem;
  margin-bottom: 1.25rem;
}

.footer__logo svg {
  width: 100%;
  height: auto;
}

.footer__tagline {
  font-size: 0.875rem;
  color: var(--on-dark-muted);
  line-height: 1.55;
  margin-bottom: 1.25rem;
}

.footer__badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--brand);
  background: rgba(248, 70, 0, 0.1);
  border: 1px solid rgba(248, 70, 0, 0.25);
  border-radius: 100px;
  padding: 0.3rem 0.875rem;
}

.footer__nav-label,
.footer__contact-label {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--on-dark-muted);
  margin-bottom: 1.25rem;
}

.footer__nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.footer__nav-list a {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  transition: color 0.2s;
}

.footer__nav-list a:hover {
  color: var(--on-dark);
}

.footer__email {
  display: block;
  font-size: 1rem;
  color: var(--on-dark);
  text-decoration: none;
  margin-bottom: 1.75rem;
  transition: color 0.2s;
}

.footer__email:hover {
  color: var(--brand);
}

.footer__cta {
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1.125rem 0;
}

.footer__copy {
  font-size: 0.8125rem;
  color: var(--on-dark-muted);
}

.footer__legal {
  display: flex;
  gap: 1.5rem;
}

.footer__legal a {
  font-size: 0.8125rem;
  color: var(--on-dark-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.footer__legal a:hover {
  color: var(--on-dark);
}

/* ============================================================
   Modal
   ============================================================ */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
}

.modal.active {
  display: flex;
}

.modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(32, 32, 32, 0.5);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.modal__dialog {
  position: relative;
  z-index: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  width: 100%;
  max-width: 32.5rem;
  max-height: calc(100vh - 2.5rem);
  overflow-y: auto;
}

.modal__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 2.25rem;
  height: 2.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6.25rem;
  color: var(--text);
  background: var(--bg-alt);
  transition: background var(--transition);
}

.modal__close:hover {
  background: var(--bg-card-hover);
}

.modal__close svg {
  width: 1rem;
  height: 1rem;
}

.modal__title {
  font-size: 1.625rem;
  font-weight: 400;
  margin-bottom: 1.5rem;
  letter-spacing: -0.01em;
  color: var(--text);
}

.form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form__field {
  width: 100%;
  padding: 0.875rem 1.125rem;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.9375rem;
  transition: border-color var(--transition), background var(--transition);
}

.form__field::placeholder {
  color: var(--text-muted);
}

.form__field:focus {
  outline: none;
  border-color: var(--brand);
  background: var(--bg);
}

.form__group {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.form__label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.form__radios {
  display: flex;
  gap: 0.625rem;
}

.form__radio {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.9375rem;
  color: var(--text);
  transition: border-color var(--transition), background var(--transition);
}

.form__radio input {
  -webkit-appearance: none;
  appearance: none;
  width: 1rem;
  height: 1rem;
  border: 1px solid var(--border-strong);
  border-radius: 6.25rem;
  position: relative;
  cursor: pointer;
  transition: border-color var(--transition);
}

.form__radio input:checked {
  border-color: var(--brand);
}

.form__radio input:checked::after {
  content: '';
  position: absolute;
  inset: 3px;
  background: var(--brand);
  border-radius: 6.25rem;
}

.form__radio:has(input:checked) {
  border-color: var(--brand);
  background: rgba(248, 70, 0, 0.06);
}

.form__submit {
  margin-top: 0.5rem;
  width: 100%;
  padding: 1rem;
  font-size: 1rem;
  font-weight: 500;
}

.form__success,
.form__error {
  display: none;
  padding: 1.5rem;
  border-radius: var(--radius);
  font-size: 1rem;
  line-height: 1.5;
  text-align: center;
}

.form__success {
  background: rgba(20, 160, 80, 0.08);
  border: 1px solid rgba(20, 160, 80, 0.3);
  color: #0a6e32;
}

.form__error {
  background: rgba(220, 60, 60, 0.08);
  border: 1px solid rgba(220, 60, 60, 0.3);
  color: #b83333;
}

/* ============================================================
   Responsive — 1023px (tablet, ≤1024px)
   Figma tablet: 768px — pl/pr 30px, section paddings per section
   ============================================================ */
@media (max-width: 1023px) {
  .container {
    padding: 0 1.875rem;
  }

  .section {
    padding: 5rem 0;
  }

  /* Figma: H2 tablet = 38px */
  .section__title {
    font-size: 2.375rem;
  }

  .navbar__links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 1rem 1.5rem 1.5rem;
    background: rgba(255, 255, 255, 0.97);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    transform: translateY(-110%);
    opacity: 0;
    pointer-events: none;
    transition: transform 300ms ease, opacity 300ms ease;
  }

  .navbar__links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .navbar__links a {
    padding: 0.875rem 0;
    border-bottom: 1px solid var(--border);
    font-size: 1.0625rem;
  }

  .navbar__links a:last-child {
    border-bottom: none;
  }

  .navbar__cta {
    margin-top: 0.75rem;
    align-self: flex-start;
  }

  .navbar__toggle {
    display: flex;
  }

  /* Figma: H1 tablet = 44px */
  .hero__title {
    font-size: 2.75rem;
  }

  /* Figma tablet: how — pt:120 pb:80 */
  .how {
    padding: 7.5rem 0 5rem;
  }

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

  /* Cases — stack on tablet */
  .cases {
    grid-template-columns: 1fr;
  }

  .cases__left {
    padding: 4rem 2rem;
  }

  .cases__right {
    min-height: 32rem;
  }

  .cases__cards {
    padding: 3rem 2rem;
  }

  .case-card--1 { margin-left: 0; }
  .case-card--2 { margin-left: 1.5rem; }
  .case-card--3 { margin-left: 0.5rem; }

  .case-card { width: 85%; }

  .footer__grid {
    gap: 2rem;
  }

  .slide {
    grid-template-columns: 1fr;
    height: auto;
  }

  .slide__content {
    padding: 2.5rem 2rem;
  }

  .slide__media {
    aspect-ratio: 16 / 9;
    order: -1;
  }

  /* Figma: H3-medium tablet = 30px */
  .slide__title {
    font-size: 1.875rem;
  }

  /* Figma tablet FAQ: gap:64 vertical */
  .faq__layout {
    flex-direction: column;
    gap: 4rem;
  }

  .faq__sidebar {
    flex: 0 0 auto;
    position: static;
  }
}

/* ============================================================
   Responsive — 767px (mobile, ≤768px)
   Figma mobile: 390px — pl/pr 16px
   ============================================================ */
@media (max-width: 767px) {
  .container {
    padding: 0 1rem;
  }

  .section {
    padding: 4rem 0;
  }

  .section__title {
    font-size: 1.875rem;
  }

  /* Figma mobile section paddings */
  .symptoms {
    padding: 2.5rem 0;
  }

  .blog {
    padding: 2.5rem 0;
  }

  .faq {
    padding: 2.5rem 0;
  }

  .cta {
    padding: 5rem 0;
  }

  .hero {
    min-height: 90vh;
    padding: 7.5rem 0 3.75rem;
  }

  .hero__title {
    font-size: 2.375rem;
  }

  .hero__text {
    font-size: 1rem;
  }

  /* Figma mobile: how — pt:64 pb:40 */
  .how {
    padding: 4rem 0 2.5rem;
  }

  /* Figma mobile: head gaps 40px */
  .how__head {
    flex-direction: column;
    align-items: flex-start;
    margin-bottom: 2.5rem;
  }

  .symptoms__head {
    align-items: flex-start;
    margin-bottom: 2.5rem;
  }

  .symptoms__grid,
  .blog__grid {
    grid-template-columns: 1fr;
  }

  .modal__dialog {
    padding: 2rem 1.5rem;
  }

  .modal__title {
    font-size: 1.375rem;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    padding-bottom: 2.5rem;
  }

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

  .blog-card__link {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================================
   Responsive — 479px (small mobile / iPhone SE)
   ============================================================ */
@media (max-width: 479px) {
  .container {
    padding: 0 1rem;
  }

  .navbar__logo {
    width: 6.875rem;
  }

  .btn {
    padding: 0.875rem 1.5rem;
    font-size: 0.9375rem;
  }

  /* Figma: H1 mobile (390px) = 44px; use slightly smaller for narrow 390px layout */
  .hero__title {
    font-size: 2rem;
  }

  .hero__text {
    font-size: 0.9375rem;
  }

  .slide__content {
    padding: 2rem 1.5rem;
  }

  .slide__title {
    font-size: 1.625rem;
  }

  .section__title {
    font-size: 1.625rem;
  }

  .symptom-card,
  .case-card {
    padding: 1.75rem 1.375rem;
  }

  .case-card { width: 95%; }
  .case-card--2 { margin-left: 1rem; }
  .case-card--3 { margin-left: 0.5rem; }

  .blog-card__body {
    padding: 1rem 1.375rem 1.5rem;
  }

  .faq__question {
    padding: 1.25rem 1.375rem;
    font-size: 1rem;
  }

  .faq__answer-inner {
    padding: 0 1.375rem 1.25rem;
  }

  .form__radios {
    flex-direction: column;
  }
}

/* ============================================================
   Symptom card background images
   ============================================================ */
.symptom-card:nth-child(1) { background-image: url('../d/card01.webp'); background-size: cover; background-position: center; }
.symptom-card:nth-child(2) { background-image: url('../d/card02.webp'); background-size: cover; background-position: center; }
.symptom-card:nth-child(3) { background-image: url('../d/card03.webp'); background-size: cover; background-position: center; }
.symptom-card:nth-child(4) { background-image: url('../d/card04.webp'); background-size: cover; background-position: center; }
.symptom-card:nth-child(5) { background-image: url('../d/card05.webp'); background-size: cover; background-position: center; }
.symptom-card:nth-child(6) { background-image: url('../d/card06.webp'); background-size: cover; background-position: center; }

@media (max-width: 1023px) {
  .symptom-card:nth-child(1) { background-image: url('../d/symp-bg-tab.webp'); }
  .symptom-card:nth-child(2) { background-image: url('../d/symp-bg-tab-1.webp'); }
  .symptom-card:nth-child(3) { background-image: url('../d/symp-bg-tab-2.webp'); }
  .symptom-card:nth-child(4) { background-image: url('../d/symp-bg-tab-3.webp'); }
  .symptom-card:nth-child(5) { background-image: url('../d/symp-bg-tab-4.webp'); }
  .symptom-card:nth-child(6) { background-image: url('../d/symp-bg-tab-5.webp'); }
}

@media (max-width: 479px) {
  .symptom-card:nth-child(1) { background-image: url('../d/symp-bg-mob1_1.webp'); }
  .symptom-card:nth-child(2) { background-image: url('../d/symp-bg-mob2.webp'); background-size: 23.625rem; background-position: center bottom; }
  .symptom-card:nth-child(3) { background-image: url('../d/symp-bg-mob3.webp'); }
  .symptom-card:nth-child(4) { background-image: url('../d/symp-bg-mob4.webp'); }
  .symptom-card:nth-child(5) { background-image: url('../d/symp-bg-mob5.webp'); }
  .symptom-card:nth-child(6) { background-image: url('../d/symp-bg-mob6.webp'); }
}