/* =========================================================
   Neuro-Universe — academic dark theme
   Courses landing: Нейрофизиология пранаямы (Леонид Кутузов)
   ========================================================= */

:root {
  /* Палитра — глубокий матовый графит с лёгким холодным оттенком */
  --bg: #070a12;
  --bg-soft: #0a0e18;
  --surface: rgba(255, 255, 255, 0.025);
  --surface-strong: rgba(255, 255, 255, 0.04);
  --surface-solid: #0e1320;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.14);

  --text: #e6e8ee;
  --text-strong: #ffffff;
  --muted: #9097a4;
  --faint: #6a7080;

  --accent: #c9a878;          /* warm sand — созерцательная традиция */
  --accent-strong: #dbbb8c;
  --accent-soft: rgba(201, 168, 120, 0.10);
  --accent-line: rgba(201, 168, 120, 0.28);

  --science: #7eb5ad;         /* sage teal — научные элементы */
  --science-soft: rgba(126, 181, 173, 0.10);

  --danger: #d27d6e;

  /* Металлический градиент для заголовков */
  --gradient-heading: linear-gradient(180deg, #ffffff 0%, #ffffff 30%, #b8bec8 100%);
  --gradient-heading-soft: linear-gradient(180deg, #ffffff 0%, #c8cdd6 100%);

  /* Glass tokens */
  --glass-bg: rgba(255, 255, 255, 0.025);
  --glass-bg-hover: rgba(255, 255, 255, 0.04);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-hover: rgba(201, 168, 120, 0.28);
  --glass-blur: saturate(140%) blur(14px);

  /* Типографика */
  --font-display: "Cormorant Garamond", "Times New Roman", Georgia, serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Размеры */
  --text-xs: 0.78rem;
  --text-sm: 0.92rem;
  --text-base: 1.02rem;
  --text-lg: 1.18rem;
  --text-xl: clamp(1.35rem, 1.05rem + 0.9vw, 1.75rem);
  --text-2xl: clamp(1.8rem, 1.3rem + 1.6vw, 2.6rem);
  --text-3xl: clamp(2.4rem, 1.6rem + 2.6vw, 3.8rem);
  --text-hero: clamp(2.8rem, 1.8rem + 4.2vw, 5.2rem);

  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 4.5rem;
  --space-8: 6rem;
  --space-9: 8rem;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 22px;

  --container: 1120px;
  --container-narrow: 880px;

  --header-h: 70px;

  --shadow-soft: 0 14px 40px rgba(0, 0, 0, 0.4);
  --shadow-strong: 0 24px 60px rgba(0, 0, 0, 0.55);

  --ease: cubic-bezier(0.4, 0.1, 0.2, 1);
}

* {
  box-sizing: border-box;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

a:hover {
  color: var(--accent-strong);
}

::selection {
  background: var(--accent-soft);
  color: var(--text-strong);
}

/* =========================================================
   Metallic gradient headings (premium feel)
   ========================================================= */

.hero__title,
.section__title,
.module__title,
.final-cta__title {
  background: var(--gradient-heading);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* Slightly softer gradient for larger H3-ish display titles */
.audience-card__title,
.tariff__name,
.result__title {
  background: var(--gradient-heading-soft);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

@supports not (-webkit-background-clip: text) {
  .hero__title,
  .section__title,
  .module__title,
  .final-cta__title,
  .audience-card__title,
  .tariff__name,
  .result__title {
    color: var(--text-strong);
    -webkit-text-fill-color: var(--text-strong);
  }
}

/* =========================================================
   Glassmorphism for cards
   ========================================================= */

.audience-card,
.tariff,
.result,
.theme,
.practice-item,
.faq-item,
.format__block,
.research__diagram,
.ecosystem__chain,
.practice__accent {
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

/* =========================================================
   Mobile typography tightening
   ========================================================= */

@media (max-width: 600px) {
  .hero__title {
    line-height: 1.02;
    letter-spacing: -0.02em;
  }
  .section__title,
  .final-cta__title {
    line-height: 1.12;
    letter-spacing: -0.015em;
  }
  .module__title {
    font-size: 1.45rem;
    line-height: 1.18;
  }
  .hero__subtitle {
    font-size: 1.15rem;
    line-height: 1.4;
  }
  .section {
    padding: var(--space-7) 0;
  }
  .hero {
    padding-top: calc(var(--header-h) + var(--space-5));
    padding-bottom: var(--space-7);
  }
  .tariff__cta.btn {
    padding: 0.85rem 1.3rem;
    font-size: 0.95rem;
  }
}

/* =========================================================
   Layout primitives
   ========================================================= */

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding: var(--space-8) 0;
  position: relative;
}

.section--tight {
  padding: var(--space-7) 0;
}

.section--soft {
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-3);
}

.section__eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--accent-line);
}

.section__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-2xl);
  line-height: 1.15;
  color: var(--text-strong);
  margin: 0 0 var(--space-4);
  letter-spacing: -0.01em;
}

.section__lead {
  font-size: var(--text-lg);
  color: var(--muted);
  max-width: 760px;
  margin: 0 0 var(--space-6);
  line-height: 1.6;
}

.divider {
  border: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--line-strong) 50%, transparent 100%);
  margin: var(--space-7) auto;
  max-width: 480px;
}

/* =========================================================
   Header
   ========================================================= */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 15, 26, 0.85);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}

.site-header__inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.55rem;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.25rem;
  color: var(--text-strong);
  letter-spacing: 0.005em;
}

.brand__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
  transform: translateY(-2px);
}

.brand__sub {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.nav__list {
  display: flex;
  gap: var(--space-5);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav__link {
  font-size: 0.9rem;
  color: var(--muted);
  letter-spacing: 0.01em;
  font-weight: 500;
  transition: color 0.2s var(--ease);
}

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

.nav__cta {
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--bg);
  background: var(--accent);
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--accent);
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}

.nav__cta:hover {
  background: var(--accent-strong);
  color: var(--bg);
  transform: translateY(-1px);
}

@media (max-width: 880px) {
  .nav__list {
    display: none;
  }
}

/* =========================================================
   Buttons
   ========================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.98rem;
  letter-spacing: 0.04em;
  padding: 0.95rem 1.7rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease), border 0.2s var(--ease), color 0.2s var(--ease);
  text-align: center;
}

.btn--primary {
  background: var(--accent);
  color: #1a1308;
  border-color: var(--accent);
}

.btn--primary:hover {
  background: var(--accent-strong);
  color: #1a1308;
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line-strong);
}

.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn--large {
  padding: 1.05rem 2rem;
  font-size: 1rem;
}

/* =========================================================
   Hero
   ========================================================= */

.hero {
  padding: calc(var(--header-h) + var(--space-7)) 0 var(--space-8);
  background:
    radial-gradient(ellipse at 80% 0%, rgba(201, 168, 120, 0.10) 0%, transparent 55%),
    radial-gradient(ellipse at 0% 100%, rgba(110, 168, 161, 0.08) 0%, transparent 50%),
    var(--bg);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
  pointer-events: none;
  opacity: 0.5;
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  align-items: center;
}

@media (min-width: 960px) {
  .hero__inner {
    grid-template-columns: 1.35fr 1fr;
    gap: var(--space-7);
  }
}

.hero__content {
  max-width: 720px;
}

.hero__visual {
  position: relative;
  align-self: stretch;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__photo-frame {
  position: relative;
  width: 100%;
  max-width: 420px;
  aspect-ratio: 3 / 4;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--accent-line);
  box-shadow: var(--shadow-strong);
  margin: 0;
}

@media (max-width: 600px) {
  .hero__photo-frame {
    max-width: 320px;
  }
}

.hero__photo-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(10, 15, 26, 0.4) 100%);
  pointer-events: none;
}

.hero__photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 25%;
  filter: saturate(0.85) contrast(1.04);
}

.hero__photo-caption {
  position: absolute;
  bottom: var(--space-3);
  left: var(--space-3);
  right: var(--space-3);
  z-index: 2;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 0.92rem;
  color: var(--text-strong);
  letter-spacing: 0.02em;
  line-height: 1.4;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.6);
}

.hero__photo-caption strong {
  display: block;
  font-style: normal;
  font-weight: 500;
  font-size: 1.05rem;
  color: #fff;
  margin-bottom: 0.1rem;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.45rem 0.95rem;
  border: 1px solid var(--accent-line);
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  margin-bottom: var(--space-5);
}

.hero__eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.hero__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-hero);
  line-height: 1.02;
  letter-spacing: -0.015em;
  color: var(--text-strong);
  margin: 0 0 var(--space-4);
}

.hero__subtitle {
  font-family: var(--font-display);
  font-weight: 400;
  font-style: italic;
  font-size: clamp(1.25rem, 1rem + 1.2vw, 1.75rem);
  line-height: 1.4;
  color: var(--text);
  max-width: 780px;
  margin: 0 0 var(--space-5);
}

.hero__description {
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--muted);
  max-width: 720px;
  margin: 0 0 var(--space-6);
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-5);
  margin: 0 0 var(--space-6);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.hero__meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.92rem;
  color: var(--text);
  letter-spacing: 0.02em;
}

.hero__meta-item strong {
  color: var(--text-strong);
  font-weight: 600;
}

.hero__meta-icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  color: var(--accent);
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
}

.hero__cta-note {
  font-size: 0.85rem;
  color: var(--faint);
  letter-spacing: 0.02em;
}

/* =========================================================
   Ecosystem block
   ========================================================= */

.ecosystem__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  align-items: start;
}

@media (min-width: 920px) {
  .ecosystem__grid {
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-7);
  }
}

.ecosystem__chain {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-5);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.ecosystem__chain-title {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--faint);
  margin: 0 0 var(--space-2);
}

.ecosystem__step {
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--line);
}

.ecosystem__step:last-child {
  border-bottom: 0;
}

.ecosystem__step-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 0.25rem;
}

.ecosystem__step-name {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.25rem;
  color: var(--text-strong);
  line-height: 1.25;
  margin: 0;
}

.ecosystem__step--current {
  background: linear-gradient(90deg, var(--accent-soft), transparent);
  border-radius: var(--radius-sm);
  padding-left: var(--space-3);
  padding-right: var(--space-3);
  margin: 0 calc(-1 * var(--space-3));
}

.ecosystem__step--current .ecosystem__step-num {
  color: var(--accent-strong);
}

.ecosystem__step-tag {
  display: inline-block;
  margin-left: 0.6rem;
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.ecosystem__text p {
  margin: 0 0 var(--space-3);
  line-height: 1.75;
  color: var(--text);
}

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

.ecosystem__text strong {
  color: var(--accent-strong);
  font-weight: 600;
}

/* =========================================================
   Manifesto
   ========================================================= */

.manifesto {
  background:
    radial-gradient(ellipse at 50% 0%, rgba(201, 168, 120, 0.06) 0%, transparent 60%),
    var(--bg);
}

.manifesto__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  align-items: start;
}

@media (min-width: 960px) {
  .manifesto__layout {
    grid-template-columns: 1fr 1.6fr;
    gap: var(--space-7);
  }
}

.manifesto__visual {
  position: relative;
  max-width: 320px;
  margin: 0 auto;
}

@media (min-width: 960px) {
  .manifesto__visual {
    position: sticky;
    top: calc(var(--header-h) + var(--space-4));
    max-width: none;
    margin: 0;
  }
}

.manifesto__photo {
  width: 100%;
  border-radius: var(--radius-lg);
  filter: grayscale(0.6) contrast(1.05) brightness(0.92);
  border: 1px solid var(--line);
}

.manifesto__photo-credit {
  display: block;
  margin-top: var(--space-2);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
}

.manifesto__inner {
  max-width: 720px;
}

.manifesto__quote {
  font-family: var(--font-display);
  font-weight: 500;
  font-style: italic;
  font-size: var(--text-2xl);
  line-height: 1.25;
  color: var(--text-strong);
  padding: var(--space-5) 0;
  border-left: 2px solid var(--accent);
  padding-left: var(--space-5);
  margin: 0 0 var(--space-6);
}

.manifesto__text p {
  margin: 0 0 var(--space-3);
  color: var(--text);
  line-height: 1.75;
}

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

/* =========================================================
   Deadlocks — Block 3½ (editorial triptych)
   Тройной типографический блок без cards/boxes
   ========================================================= */

.deadlocks__list {
  display: flex;
  flex-direction: column;
  margin-top: var(--space-5);
}

.deadlock {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  padding: var(--space-5) 0;
  border-bottom: 1px solid var(--line);
}

.deadlock:first-child {
  padding-top: var(--space-4);
  border-top: 1px solid var(--line);
}

.deadlock:last-child {
  border-bottom: 0;
}

@media (min-width: 760px) {
  .deadlock {
    grid-template-columns: 80px 1fr;
    column-gap: var(--space-5);
    padding: var(--space-6) 0;
    align-items: start;
  }
}

.deadlock__num {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(2.2rem, 1.6rem + 1.4vw, 3rem);
  line-height: 1;
  color: var(--accent);
  letter-spacing: -0.02em;
  opacity: 0.85;
}

.deadlock__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.deadlock__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.25rem, 1rem + 0.6vw, 1.55rem);
  line-height: 1.2;
  margin: 0;
  background: var(--gradient-heading-soft);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

@supports not (-webkit-background-clip: text) {
  .deadlock__title {
    color: var(--text-strong);
    -webkit-text-fill-color: var(--text-strong);
  }
}

.deadlock__problem {
  font-size: 0.97rem;
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
}

.deadlock__problem em {
  font-style: italic;
  color: var(--text);
  font-family: var(--font-body);
}

.deadlock__solution {
  position: relative;
  padding-left: var(--space-3);
  margin: var(--space-2) 0 0;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--accent);
  letter-spacing: 0.005em;
}

.deadlock__solution::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: linear-gradient(180deg, var(--accent) 0%, transparent 100%);
  border-radius: 1px;
}

/* =========================================================
   Audiences
   ========================================================= */

.audiences__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 760px) {
  .audiences__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.audience-card {
  padding: var(--space-5);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
  display: flex;
  flex-direction: column;
}

.audience-card:hover {
  border-color: var(--accent-line);
  transform: translateY(-3px);
}

.audience-card__num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: var(--space-3);
}

.audience-card__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.5rem;
  line-height: 1.2;
  color: var(--text-strong);
  margin: 0 0 0.4rem;
}

.audience-card__subtitle {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-style: italic;
  color: var(--accent);
  margin: 0 0 var(--space-3);
  line-height: 1.45;
}

.audience-card__text {
  font-size: 0.97rem;
  line-height: 1.7;
  color: var(--muted);
  margin: 0;
}

/* =========================================================
   Program (modules + themes)
   ========================================================= */

.module {
  margin-bottom: var(--space-6);
}

.module:last-child {
  margin-bottom: 0;
}

.module__header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-3);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--line);
  margin-bottom: var(--space-5);
}

.module__num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  text-transform: uppercase;
}

.module__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-xl);
  line-height: 1.2;
  color: var(--text-strong);
  margin: 0;
}

.themes {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 760px) {
  .themes {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4) var(--space-5);
  }
}

.theme {
  padding: var(--space-4);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  transition: border-color 0.25s var(--ease);
}

.theme:hover {
  border-color: var(--accent-line);
}

.theme__head {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  margin-bottom: 0.6rem;
}

.theme__num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  flex-shrink: 0;
}

.theme__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.15rem;
  line-height: 1.3;
  color: var(--text-strong);
  margin: 0;
}

.theme__text {
  font-size: 0.94rem;
  line-height: 1.65;
  color: var(--muted);
  margin: 0;
}

/* =========================================================
   Practice (12 techniques)
   ========================================================= */

.practice__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

@media (min-width: 760px) {
  .practice__list {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3) var(--space-4);
  }
}

.practice-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  transition: border-color 0.25s var(--ease);
}

.practice-item:hover {
  border-color: var(--accent-line);
}

.practice-item--final {
  background: linear-gradient(135deg, var(--surface) 0%, rgba(110, 168, 161, 0.05) 100%);
  border-color: var(--accent-line);
}

.practice-item__num {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent);
  letter-spacing: 0.04em;
  padding-top: 0.2rem;
  min-width: 1.8rem;
}

.practice-item__name {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.15rem;
  color: var(--text-strong);
  margin: 0 0 0.3rem;
  line-height: 1.3;
}

.practice-item__text {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--muted);
  margin: 0;
}

/* =========================================================
   Practice photo accent
   ========================================================= */

.practice__accent {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  align-items: center;
  margin-bottom: var(--space-6);
  padding: var(--space-5);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

@media (min-width: 760px) {
  .practice__accent {
    grid-template-columns: 1fr 1.4fr;
    gap: var(--space-6);
  }
}

.practice__accent-image {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 3 / 4;
  max-height: 380px;
}

.practice__accent-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.9);
}

.practice__accent-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.5rem;
  line-height: 1.3;
  color: var(--text-strong);
  margin: 0 0 var(--space-3);
}

.practice__accent-text {
  color: var(--muted);
  line-height: 1.7;
  font-size: 0.97rem;
  margin: 0;
}

/* =========================================================
   Cinematic banner (between sections)
   ========================================================= */

.banner-image {
  position: relative;
  margin: 0;
  width: 100%;
  height: clamp(280px, 36vw, 460px);
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #000;
}

.banner-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 38%;
  filter: grayscale(1) contrast(1.1) brightness(0.92);
  opacity: 0.92;
}

.banner-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 50%, transparent 0%, rgba(10, 15, 26, 0.65) 80%),
    linear-gradient(180deg, rgba(10, 15, 26, 0.3) 0%, transparent 30%, transparent 70%, rgba(10, 15, 26, 0.5) 100%);
  pointer-events: none;
}

.banner-image__caption {
  position: absolute;
  left: 50%;
  bottom: clamp(var(--space-3), 4vw, var(--space-5));
  transform: translateX(-50%);
  z-index: 1;
  width: min(720px, 88%);
  text-align: center;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
  font-size: clamp(0.98rem, 0.85rem + 0.8vw, 1.45rem);
  line-height: 1.4;
  color: #fff;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.7);
  letter-spacing: 0.005em;
}

/* =========================================================
   Research / Scientific foundations
   ========================================================= */

.research__diagrams {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  margin-top: var(--space-6);
}

@media (min-width: 920px) {
  .research__diagrams {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-5);
  }
}

.research__diagram {
  margin: 0;
  padding: var(--space-5);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
}

.research__diagram-title {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--faint);
  margin: 0 0 var(--space-4);
}

.research__diagram svg {
  width: 100%;
  height: auto;
  display: block;
  margin-bottom: var(--space-4);
}

.research__diagram-caption {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--muted);
  margin: 0;
}

/* SVG hover spotlight: dim non-hovered groups, highlight the hovered one */
.research__diagram svg g {
  transition: opacity 0.3s var(--ease);
}

.research__diagram svg g path,
.research__diagram svg g rect {
  transition: stroke-width 0.3s var(--ease), stroke 0.3s var(--ease);
}

.research__diagram svg:hover g {
  opacity: 0.5;
}

.research__diagram svg:hover g:hover {
  opacity: 1;
}

.research__diagram svg:hover g:hover path {
  stroke-width: 2.4;
}

.research__diagram svg:hover g:hover rect {
  stroke-width: 2;
  stroke: var(--accent-strong);
}

.research__note {
  margin-top: var(--space-5);
  padding: var(--space-4);
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  border-radius: var(--radius-md);
  font-size: 0.93rem;
  line-height: 1.65;
  color: var(--text);
}

.research__note strong {
  color: var(--accent-strong);
  font-weight: 600;
}

/* =========================================================
   About author
   ========================================================= */

.author__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  align-items: start;
}

@media (min-width: 920px) {
  .author__grid {
    grid-template-columns: 1.1fr 1.4fr;
    gap: var(--space-7);
  }
}

.author__photos {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.author__photo {
  width: 100%;
  border-radius: var(--radius-md);
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: 1px solid var(--line);
}

.author__photo--lead {
  grid-column: 1 / -1;
  aspect-ratio: auto;
  height: auto;
  max-height: 580px;
}

@media (min-width: 920px) {
  .author__photos {
    grid-template-columns: 1.5fr 1fr;
    grid-template-rows: auto auto;
    gap: var(--space-3);
  }
  .author__photo--lead {
    grid-column: 1 / 2;
    grid-row: 1 / 3;
    max-height: none;
    aspect-ratio: 3 / 4;
  }
  .author__photo--side {
    grid-column: 2 / 3;
    aspect-ratio: 3 / 4;
  }
  .author__photos-credit {
    grid-column: 1 / -1;
  }
}

.author__photos-credit {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
  margin: 0;
  text-align: right;
}

.author__name {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-2xl);
  line-height: 1.15;
  color: var(--text-strong);
  margin: 0 0 var(--space-2);
}

.author__role {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.2rem;
  color: var(--accent);
  margin: 0 0 var(--space-4);
  line-height: 1.5;
}

.author__text p {
  margin: 0 0 var(--space-3);
  color: var(--text);
  line-height: 1.75;
}

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

.author__credentials {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--line);
}

@media (min-width: 560px) {
  .author__credentials {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-3);
  }
}

.author__credential-num {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.85rem;
  line-height: 1;
  color: var(--accent);
  margin-bottom: 0.4rem;
  letter-spacing: -0.01em;
}

.author__credential-label {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.4;
}

/* =========================================================
   Results
   ========================================================= */

.results__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 720px) {
  .results__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1000px) {
  .results__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.result {
  padding: var(--space-5);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  position: relative;
}

.result__num {
  position: absolute;
  top: var(--space-3);
  right: var(--space-4);
  font-family: var(--font-display);
  font-style: italic;
  font-size: 2rem;
  color: var(--accent);
  opacity: 0.55;
  line-height: 1;
}

.result__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.2rem;
  line-height: 1.25;
  color: var(--text-strong);
  margin: 0 0 var(--space-2);
  max-width: 90%;
}

.result__text {
  font-size: 0.93rem;
  line-height: 1.65;
  color: var(--muted);
  margin: 0;
}

/* =========================================================
   Format / Digital hygiene
   ========================================================= */

.format__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 920px) {
  .format__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }
}

.format__block {
  padding: var(--space-5);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.format__block--accent {
  background: linear-gradient(135deg, var(--surface) 0%, var(--accent-soft) 130%);
  border-color: var(--accent-line);
}

.format__block-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.35rem;
  color: var(--text-strong);
  margin: 0 0 var(--space-3);
  line-height: 1.3;
}

.format__block-text p {
  margin: 0 0 var(--space-2);
  font-size: 0.96rem;
  line-height: 1.7;
  color: var(--muted);
}

.format__block-text p:last-child {
  margin-bottom: 0;
}

.format__block-text strong {
  color: var(--text);
}

.format__photo {
  position: relative;
  margin: var(--space-6) 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  height: clamp(220px, 28vw, 360px);
  background: #000;
}

.format__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  filter: saturate(0.9) brightness(0.85);
}

.format__photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(10, 15, 26, 0.85) 0%, rgba(10, 15, 26, 0.5) 50%, transparent 100%);
  pointer-events: none;
}

.format__photo-caption {
  position: absolute;
  top: 50%;
  left: var(--space-5);
  transform: translateY(-50%);
  z-index: 1;
  max-width: 50%;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
  font-size: clamp(1rem, 0.85rem + 0.7vw, 1.3rem);
  line-height: 1.45;
  color: #fff;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.6);
}

@media (max-width: 720px) {
  .format__photo-caption {
    max-width: 80%;
    font-size: 1rem;
  }
}

/* =========================================================
   Pricing
   ========================================================= */

.pricing__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 920px) {
  .pricing__grid {
    grid-template-columns: repeat(3, 1fr);
    align-items: stretch;
  }
}

.tariff {
  display: flex;
  flex-direction: column;
  padding: var(--space-5);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  position: relative;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.tariff:hover {
  border-color: var(--accent-line);
  transform: translateY(-3px);
}

.tariff--featured {
  border-color: rgba(201, 168, 120, 0.4);
  background: linear-gradient(180deg, rgba(201, 168, 120, 0.05) 0%, rgba(7, 10, 18, 0.6) 100%);
  box-shadow:
    0 0 0 1px rgba(201, 168, 120, 0.15),
    0 20px 50px rgba(201, 168, 120, 0.04),
    var(--shadow-strong);
  position: relative;
}

@media (min-width: 920px) {
  .tariff--featured {
    transform: scale(1.02);
  }
}

.tariff--featured::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: linear-gradient(180deg, rgba(201, 168, 120, 0.32) 0%, transparent 50%);
  z-index: -1;
  filter: blur(8px);
  opacity: 0.6;
  pointer-events: none;
}

.tariff__badge {
  position: absolute;
  top: -11px;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.32rem 0.95rem;
  background: var(--accent);
  color: #1a1308;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: 999px;
  white-space: nowrap;
  box-shadow: 0 4px 14px rgba(201, 168, 120, 0.32);
}

.tariff__name {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.5rem;
  line-height: 1.2;
  color: var(--text-strong);
  margin: 0 0 0.3rem;
}

.tariff__tagline {
  font-family: var(--font-body);
  font-style: italic;
  font-size: 0.9rem;
  color: var(--accent);
  margin: 0 0 var(--space-4);
}

.tariff__access {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.8rem;
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.04em;
  margin-bottom: var(--space-4);
  align-self: flex-start;
}

.tariff__features {
  list-style: none;
  margin: 0 0 var(--space-5);
  padding: 0;
  flex: 1;
}

.tariff__feature {
  position: relative;
  padding: 0.55rem 0 0.55rem 1.6rem;
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--text);
  border-bottom: 1px dashed var(--line);
}

.tariff__feature:last-child {
  border-bottom: 0;
}

.tariff__feature::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.05rem;
  width: 8px;
  height: 8px;
  border: 1.5px solid var(--accent);
  border-radius: 50%;
}

.tariff__feature--strong::before {
  background: var(--accent);
}

.tariff__feature--muted {
  color: var(--faint);
}

.tariff__feature--muted::before {
  border-color: var(--faint);
}

.tariff__fit {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.55;
  font-style: italic;
  margin: 0 0 var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--line);
}

.tariff__cta {
  display: inline-block;
  text-align: center;
  width: 100%;
}

/* =========================================================
   FAQ
   ========================================================= */

.faq__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.25s var(--ease);
}

.faq-item[open] {
  border-color: var(--accent-line);
}

.faq-item__summary {
  list-style: none;
  cursor: pointer;
  padding: var(--space-4) var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.2rem;
  line-height: 1.35;
  color: var(--text-strong);
  transition: color 0.2s var(--ease);
}

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

.faq-item__summary:hover {
  color: var(--accent);
}

.faq-item__icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  color: var(--accent);
  transition: transform 0.3s var(--ease);
}

.faq-item[open] .faq-item__icon {
  transform: rotate(45deg);
}

.faq-item__body {
  padding: 0 var(--space-5) var(--space-5);
  border-top: 1px solid var(--line);
  padding-top: var(--space-4);
}

.faq-item__body p {
  margin: 0 0 var(--space-3);
  font-size: 0.97rem;
  line-height: 1.75;
  color: var(--muted);
}

.faq-item__body p:last-child {
  margin-bottom: 0;
}

.faq-item__body strong {
  color: var(--text);
  font-weight: 600;
}

.faq-item__body ul {
  margin: 0 0 var(--space-3);
  padding-left: var(--space-4);
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item__body ul li {
  margin-bottom: 0.4rem;
}

/* =========================================================
   Final CTA
   ========================================================= */

.final-cta {
  background:
    radial-gradient(ellipse at 50% 50%, rgba(201, 168, 120, 0.10) 0%, transparent 60%),
    var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: center;
  padding: var(--space-8) 0;
}

.final-cta__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-2xl);
  line-height: 1.2;
  color: var(--text-strong);
  margin: 0 0 var(--space-3);
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.final-cta__text {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.6;
  max-width: 600px;
  margin: 0 auto var(--space-5);
}

/* =========================================================
   Footer
   ========================================================= */

.site-footer {
  padding: var(--space-7) 0 var(--space-5);
  background: var(--bg);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  margin-bottom: var(--space-5);
}

@media (min-width: 760px) {
  .site-footer__grid {
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-6);
  }
}

.site-footer__brand {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.35rem;
  color: var(--text-strong);
  margin: 0 0 var(--space-2);
}

.site-footer__about {
  max-width: 360px;
  line-height: 1.6;
}

.site-footer__col-title {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
  margin: 0 0 var(--space-3);
}

.site-footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.site-footer__list a {
  color: var(--text);
  transition: color 0.2s var(--ease);
}

.site-footer__list a:hover {
  color: var(--accent);
}

.site-footer__bottom {
  padding-top: var(--space-4);
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  font-size: 0.85rem;
  color: var(--faint);
}

/* =========================================================
   Version switcher (fixed pill in top-right corner)
   Shared between styles.css and styles-bw.css
   ========================================================= */

.version-switch {
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 100;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 6px 10px;
  background: rgba(10, 10, 10, 0.65);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(236, 230, 221, 0.14);
  border-radius: 999px;
  font-size: 0.72rem;
  font-family: var(--font-body);
  letter-spacing: 0.05em;
}

.version-switch__label {
  color: rgba(236, 230, 221, 0.55);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.65rem;
  padding-left: 4px;
}

.version-switch__btn {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  color: rgba(236, 230, 221, 0.75);
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease;
  white-space: nowrap;
}

.version-switch__btn:hover {
  color: #ffffff;
}

.version-switch__btn--active {
  background: rgba(236, 230, 221, 0.92);
  color: #070a12;
}

.version-switch__btn--active:hover {
  color: #070a12;
  background: #ffffff;
}

@media (max-width: 560px) {
  .version-switch {
    top: 10px;
    right: 10px;
    padding: 4px 6px;
    font-size: 0.66rem;
  }
  .version-switch__label {
    display: none;
  }
  .version-switch__btn {
    padding: 0.28rem 0.55rem;
  }
}

/* =========================================================
   Reduced motion
   ========================================================= */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}