/* NeckPulse - Blue Redesign 2026 */
/* Variables */
:root {
  --color-primary: #1D4ED8;
  --color-primary-light: #3B82F6;
  --color-secondary: #DBEAFE;
  --color-accent: #06B6D4;
  --color-bg: #F7FBFF;
  --color-bg-alt: #ECF5FF;
  --color-text: #0F172A;
  --color-text-muted: #475569;
  --color-white: #FFFFFF;
  --color-border: #CFE0FF;
  --radius: 22px;
  --radius-sm: 14px;
  --shadow: 0 10px 30px rgba(29, 78, 216, 0.10);
  --shadow-lg: 0 24px 70px rgba(29, 78, 216, 0.16);
  --font-display: 'Poppins', 'Inter', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 251, 255, 0.86);
  border-bottom: 1px solid rgba(207, 224, 255, 0.9);
  box-shadow: 0 6px 24px rgba(29, 78, 216, 0.08);
  backdrop-filter: blur(10px);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 400;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo:hover {
  color: var(--color-primary-light);
}

.nav {
  display: flex;
  gap: 32px;
}

.nav__link {
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  transition: color 0.2s;
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-primary);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 16px 32px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
  border-radius: var(--radius);
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 55%, var(--color-accent) 100%);
  color: var(--color-white);
  box-shadow: 0 14px 42px rgba(29, 78, 216, 0.18);
}

.btn--primary:hover {
  filter: brightness(1.02);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn--secondary {
  background: rgba(6, 182, 212, 0.12);
  color: var(--color-primary);
  border: 1px solid rgba(6, 182, 212, 0.35);
}

.btn--secondary:hover {
  background: rgba(6, 182, 212, 0.18);
  border-color: rgba(6, 182, 212, 0.55);
}

.btn--light {
  background: var(--color-white);
  color: var(--color-primary);
  border: 1px solid rgba(29, 78, 216, 0.25);
}

.btn--light:hover {
  background: transparent;
  color: var(--color-primary);
}

/* Hero */
.hero {
  padding: 60px 0 0;
  background:
    radial-gradient(1000px 400px at 15% 0%, rgba(59, 130, 246, 0.15) 0%, rgba(59, 130, 246, 0) 60%),
    radial-gradient(900px 380px at 90% 10%, rgba(6, 182, 212, 0.14) 0%, rgba(6, 182, 212, 0) 55%),
    linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero__content {
  padding: 20px 0 60px;
}

.hero__badge {
  display: inline-block;
  padding: 10px 20px;
  background: var(--color-white);
  border: 1px solid rgba(207, 224, 255, 0.95);
  border-radius: 100px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 24px;
  box-shadow: 0 14px 38px rgba(29, 78, 216, 0.10);
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 4vw, 3.5rem);
  font-weight: 400;
  line-height: 1.15;
  color: var(--color-primary);
  margin: 0 0 24px;
  letter-spacing: -0.02em;
}

.hero__text {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin: 0 0 36px;
  max-width: 520px;
}

.hero__image {
  min-height: 500px;
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(29, 78, 216, 0.14) 0%, rgba(59, 130, 246, 0.08) 40%, rgba(6, 182, 212, 0.10) 100%),
    radial-gradient(600px 240px at 60% 30%, rgba(59, 130, 246, 0.25) 0%, rgba(59, 130, 246, 0) 65%),
    #ffffff;
  border: 1px solid rgba(207, 224, 255, 0.95);
  box-shadow: 0 26px 90px rgba(29, 78, 216, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
}

.device-illustration {
  width: min(420px, 70%);
  height: auto;
  opacity: 0.98;
}

.hero__features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: -40px;
}

.feature-card {
  padding: 32px 24px;
  background: var(--color-white);
  text-align: center;
  border-right: 1px solid rgba(207, 224, 255, 0.95);
  box-shadow: 0 16px 45px rgba(29, 78, 216, 0.08);
}

.feature-card:last-child {
  border-right: none;
}

.feature-card__icon {
  font-size: 2rem;
  display: block;
  margin-bottom: 12px;
}

.feature-card h3 {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  margin: 0;
  color: var(--color-text);
}

/* Reviews */
.reviews {
  padding: 80px 0;
  background: var(--color-white);
}

.reviews__inner {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 60px;
  align-items: start;
}

.reviews__lead {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin: 0 0 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(207, 224, 255, 0.95);
}

.reviews__title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 400;
  color: var(--color-primary);
  margin: 0 0 32px;
  line-height: 1.3;
}

.reviews__carousel {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  padding: 32px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

.review-card__avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background-size: cover;
  background-position: center;
  margin-bottom: 20px;
}

.review-card__text {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0 0 16px;
  line-height: 1.65;
}

.review-card__author {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--color-primary);
}

/* Ingredients */
.ingredients {
  padding: 80px 0;
  background: var(--color-bg-alt);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 400;
  color: var(--color-primary);
  margin: 0 0 16px;
  text-align: center;
}

.section-lead {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin: 0 auto 48px;
  max-width: 640px;
  text-align: center;
}

.ingredients__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.ingredient-card {
  padding: 32px;
  background: var(--color-white);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow);
}

.ingredient-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
  margin: 0 0 12px;
}

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

.ingredients__image {
  display: flex;
  justify-content: center;
}

.ingredients__image svg {
  width: 100%;
  height: auto;
  display: block;
}

.ingredients__img {
  max-width: 400px;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

/* How to use */
.how-to-use {
  padding: 80px 0;
  background: var(--color-white);
}

.how-to-use .section-lead {
  margin-bottom: 48px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.step {
  padding: 40px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius);
  position: relative;
}

.step__number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 400;
  opacity: 0.4;
  position: absolute;
  top: 24px;
  right: 24px;
}

.step h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 16px;
}

.step p {
  font-size: 1rem;
  margin: 0;
  opacity: 0.9;
}

/* Benefits */
.benefits {
  padding: 80px 0;
  background: var(--color-bg-alt);
}

.benefits__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.benefit-card {
  display: flex;
  gap: 24px;
  padding: 40px;
  background: var(--color-white);
  border-radius: var(--radius-sm);
  border-left: 4px solid rgba(6, 182, 212, 0.85);
  box-shadow: 0 18px 55px rgba(29, 78, 216, 0.08);
}

.benefit-card__icon {
  font-size: 1.5rem;
  color: var(--color-accent);
  font-weight: 700;
  flex-shrink: 0;
}

.benefit-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
  margin: 0 0 8px;
}

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

/* CTA */
.cta {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 55%, var(--color-accent) 110%);
  color: var(--color-white);
}

.cta__box {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.cta__box h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.5vw, 2.25rem);
  font-weight: 400;
  margin: 0 0 24px;
}

.cta__line {
  width: 80px;
  height: 3px;
  background: var(--color-accent);
  margin: 0 auto 24px;
}

.cta__box p {
  font-size: 1.125rem;
  opacity: 0.95;
  margin: 0 0 32px;
  line-height: 1.7;
}

/* FAQ */
.faq {
  padding: 80px 0;
  background: var(--color-white);
}

.faq__image {
  width: 100%;
  max-width: 500px;
  height: auto;
  border-radius: var(--radius);
  margin-bottom: 48px;
  display: block;
  object-fit: cover;
}

.faq__image svg {
  width: 100%;
  height: auto;
  display: block;
}

.faq .section-title,
.faq .section-lead {
  text-align: left;
}

.faq .section-lead {
  margin-left: 0;
  margin-right: 0;
  margin-bottom: 32px;
}

.accordion {
  max-width: 700px;
}

.accordion__item {
  border: 1px solid rgba(207, 224, 255, 0.95);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
}

.accordion__trigger {
  padding: 24px 32px;
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(236, 245, 255, 0.85);
}

.accordion__trigger::-webkit-details-marker {
  display: none;
}

.accordion__trigger::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 400;
}

.accordion__item[open] .accordion__trigger::after {
  content: '−';
}

.accordion__content {
  padding: 0 32px 24px;
}

.accordion__content p {
  margin: 0;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* Footer */
.footer {
  padding: 60px 0 40px;
  background: linear-gradient(180deg, #0B2445 0%, #081A33 100%);
  color: rgba(255, 255, 255, 0.85);
}

.footer__disclaimer {
  font-size: 0.875rem;
  margin: 0 0 24px;
  max-width: 800px;
  line-height: 1.65;
}

.footer__contact {
  font-size: 0.9375rem;
  margin: 0 0 32px;
  line-height: 1.8;
}

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

.footer__contact a:hover {
  text-decoration: underline;
}

.footer__nav {
  display: flex;
  gap: 32px;
  margin-bottom: 32px;
}

.footer__nav a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-size: 0.9375rem;
}

.footer__nav a:hover {
  color: var(--color-white);
}

.footer__copy {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
  margin: 0;
}

/* Page content (Cookie, Terms, Privacy) */
.page-content {
  padding: 80px 0 100px;
}

.page-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 400;
  color: var(--color-primary);
  margin: 0 0 40px;
}

.page-body {
  max-width: 720px;
}

.page-body h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
  margin: 32px 0 12px;
  padding-left: 16px;
  border-left: 4px solid rgba(29, 78, 216, 0.35);
}

.page-body h2:first-of-type {
  margin-top: 0;
}

.page-body p, .page-body li {
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  margin: 0 0 16px;
}

.page-body ul {
  margin: 0 0 16px;
  padding-left: 24px;
}

.page-body a {
  color: var(--color-primary);
  text-decoration: none;
}

.page-body a:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero__inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero__image {
    min-height: 400px;
    order: -1;
  }

  .hero__features {
    grid-template-columns: repeat(2, 1fr);
    margin-top: 0;
  }

  .feature-card {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }

  .feature-card:nth-child(odd) {
    border-right: 1px solid var(--color-border);
  }

  .reviews__inner {
    grid-template-columns: 1fr;
  }

  .reviews__carousel {
    grid-template-columns: 1fr;
  }

  .ingredients__grid {
    grid-template-columns: 1fr;
  }

  .steps {
    grid-template-columns: 1fr;
  }

  .benefits__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }

  .hero {
    padding: 40px 0 0;
  }

  .hero__features {
    grid-template-columns: 1fr;
  }

  .feature-card:nth-child(odd) {
    border-right: none;
  }

  .reviews,
  .ingredients,
  .how-to-use,
  .benefits,
  .cta,
  .faq {
    padding: 60px 0;
  }

  .cta__box p {
    font-size: 1rem;
  }

  .footer__nav {
    flex-direction: column;
    gap: 16px;
  }
}

@media (max-width: 480px) {
  .header__inner {
    min-height: 60px;
  }

  .logo {
    font-size: 1.5rem;
  }

  .btn {
    padding: 14px 24px;
    font-size: 0.875rem;
  }

  .hero__image {
    min-height: 300px;
  }
}