/* ==========================================================================
   OBS Studio — гид. Дизайн-система: «органичный» природный UI.
   Глубокая зелень + тёплые песочно-коричневые акценты. Чистый CSS.
   ========================================================================== */

:root {
  --radius: 1rem;

  --background: oklch(0.24 0.045 158);
  --foreground: oklch(0.95 0.02 95);

  --surface: oklch(0.29 0.048 160);
  --card: oklch(0.31 0.05 162);

  --primary: oklch(0.79 0.088 68);
  --primary-foreground: oklch(0.26 0.045 60);

  --secondary: oklch(0.36 0.055 162);
  --muted-foreground: oklch(0.78 0.028 130);

  --leaf: oklch(0.68 0.14 145);
  --leaf-foreground: oklch(0.21 0.04 158);
  --bark: oklch(0.42 0.07 55);
  --bark-foreground: oklch(0.95 0.03 85);
  --sand: oklch(0.85 0.06 78);
  --sand-foreground: oklch(0.3 0.05 60);

  --border: oklch(0.4 0.045 160);

  --shadow-soft: 0 24px 60px -24px oklch(0.12 0.04 158 / 0.75);
  --gradient-hero: linear-gradient(
    135deg,
    oklch(0.34 0.07 160) 0%,
    oklch(0.26 0.05 158) 55%,
    oklch(0.31 0.06 120) 100%
  );
  --gradient-sand: linear-gradient(135deg, oklch(0.86 0.07 80), oklch(0.76 0.09 62));
  --gradient-panel: linear-gradient(
    150deg,
    oklch(0.35 0.06 165 / 0.92),
    oklch(0.28 0.05 158 / 0.92)
  );

  --font-display: "Bricolage Grotesque", ui-sans-serif, system-ui, sans-serif;
  --font-sans: "Manrope", ui-sans-serif, system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  border-color: var(--border);
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  display: flex;
  min-height: 100vh;
  flex-direction: column;
}

main {
  flex: 1;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  letter-spacing: -0.02em;
  margin: 0;
  line-height: 1.05;
}

p,
ul,
ol {
  margin: 0;
}

ul,
ol {
  padding: 0;
  list-style: none;
}

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

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

button {
  font: inherit;
  cursor: pointer;
}

/* ------------------------------- утилиты ------------------------------- */

.container {
  margin: 0 auto;
  width: 100%;
  max-width: 72rem;
  padding: 0 1rem;
}

.container-narrow {
  max-width: 48rem;
}

.container-mid {
  max-width: 56rem;
}

.muted {
  color: var(--muted-foreground);
}

.small {
  font-size: 0.875rem;
}

.tiny {
  font-size: 0.75rem;
}

.leaf-texture {
  background-image:
    radial-gradient(circle at 20% 15%, oklch(1 0 0 / 0.05) 0, transparent 45%),
    radial-gradient(circle at 85% 70%, oklch(1 0 0 / 0.04) 0, transparent 40%);
}

.hero-gradient {
  background-image: var(--gradient-hero);
}

.soft-shadow {
  box-shadow: var(--shadow-soft);
}

.panel {
  background-image: var(--gradient-panel);
  border: 1px solid oklch(1 0 0 / 0.08);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(8px);
  border-radius: calc(var(--radius) + 20px);
}

.card {
  border: 1px solid color-mix(in oklab, var(--border) 60%, transparent);
  background-color: var(--card);
  border-radius: calc(var(--radius) + 20px);
  padding: 1.5rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-leaf {
  background-color: var(--leaf);
  color: var(--leaf-foreground);
}

.badge-sand {
  background-color: var(--sand);
  color: var(--sand-foreground);
}

.badge-muted {
  background-color: var(--secondary);
  color: var(--muted-foreground);
}

.eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border-radius: 999px;
  padding: 0.875rem 1.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  border: 1px solid transparent;
  transition:
    transform 0.15s ease,
    background-color 0.15s ease,
    color 0.15s ease;
}

.btn-primary {
  background-image: var(--gradient-sand);
  color: var(--primary-foreground);
  box-shadow: var(--shadow-soft);
}

.btn-primary:hover {
  transform: scale(1.03);
}

.btn-ghost {
  border-color: color-mix(in oklab, var(--border) 80%, transparent);
  color: var(--foreground);
}

.btn-ghost:hover {
  background-color: var(--secondary);
}

.icon {
  width: 1.25rem;
  height: 1.25rem;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: none;
}

.icon-sm {
  width: 1rem;
  height: 1rem;
}

.icon-circle {
  display: flex;
  width: 3rem;
  height: 3rem;
  flex: none;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid color-mix(in oklab, var(--border) 70%, transparent);
  background-color: color-mix(in oklab, var(--secondary) 60%, transparent);
  color: var(--primary);
}

.icon-circle.leaf {
  background-color: var(--leaf);
  color: var(--leaf-foreground);
  border-color: transparent;
}

.icon-circle.bark {
  background-color: var(--bark);
  color: var(--bark-foreground);
  border-color: transparent;
}

.icon-circle.sand {
  background-color: var(--sand);
  color: var(--sand-foreground);
  border-color: transparent;
}

.grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .grid-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .grid-lg-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 640px) and (max-width: 1023px) {
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip {
  border-radius: 999px;
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted-foreground);
  transition: background-color 0.15s ease;
}

.chip:hover {
  background-color: var(--secondary);
  color: var(--foreground);
}

.chip.active {
  background-image: var(--gradient-sand);
  color: var(--primary-foreground);
  border-color: transparent;
}

.bullet-list li {
  display: flex;
  gap: 0.75rem;
  font-size: 0.875rem;
  color: var(--muted-foreground);
  margin-top: 0.625rem;
}

.dot {
  margin-top: 0.5rem;
  width: 0.375rem;
  height: 0.375rem;
  flex: none;
  border-radius: 999px;
  background-color: var(--leaf);
}

.step-num {
  display: flex;
  width: 1.5rem;
  height: 1.5rem;
  flex: none;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background-color: var(--secondary);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--foreground);
}

.section {
  padding: 3rem 0;
}

.hover-lift {
  transition: transform 0.2s ease;
}

.hover-lift:hover {
  transform: translateY(-4px);
}

/* ------------------------------- шапка ------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid color-mix(in oklab, var(--border) 60%, transparent);
  background-color: color-mix(in oklab, var(--background) 85%, transparent);
  backdrop-filter: blur(12px);
}

.header-inner {
  display: flex;
  height: 4rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
}

.brand-mark {
  display: flex;
  width: 2.25rem;
  height: 2.25rem;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background-color: var(--leaf);
  color: var(--leaf-foreground);
}

.brand-logo {
  width: 1.75rem;
  height: 1.75rem;
  display: block;
}

.main-nav {
  display: none;
  align-items: center;
  gap: 0.25rem;
}

.main-nav a {
  border-radius: 999px;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  color: var(--muted-foreground);
  transition: background-color 0.15s ease;
}

.main-nav a:hover {
  background-color: color-mix(in oklab, var(--secondary) 70%, transparent);
  color: var(--foreground);
}

.main-nav a[aria-current="page"],
.mobile-nav a[aria-current="page"] {
  background-color: var(--secondary);
  color: var(--foreground);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.header-cta {
  display: none;
  padding: 0.5rem 1.25rem;
}

.menu-btn {
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--foreground);
  padding: 0.5rem;
  display: flex;
}

.mobile-nav {
  border-top: 1px solid color-mix(in oklab, var(--border) 60%, transparent);
  background-color: var(--surface);
  padding: 0.75rem 1rem;
}

.mobile-nav a {
  display: block;
  border-radius: 0.75rem;
  padding: 0.625rem 0.75rem;
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

.mobile-nav a:hover {
  background-color: var(--secondary);
  color: var(--foreground);
}

.mobile-nav[hidden] {
  display: none;
}

/* переключатель языка */
.lang {
  position: relative;
}

.lang-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted-foreground);
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  text-transform: uppercase;
}

.lang-trigger:hover {
  background-color: var(--secondary);
  color: var(--foreground);
}

.lang-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 0.5rem);
  min-width: 11rem;
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  background-color: var(--card);
  box-shadow: var(--shadow-soft);
  padding: 0.25rem;
  z-index: 60;
}

.lang-menu[hidden] {
  display: none;
}

.lang-menu a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-radius: 0.5rem;
  padding: 0.5rem 0.625rem;
  font-size: 0.875rem;
}

.lang-menu a:hover {
  background-color: var(--secondary);
}

.lang-menu .code {
  margin-left: auto;
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--muted-foreground);
}

@media (min-width: 640px) {
  .header-cta {
    display: inline-flex;
  }
}

@media (min-width: 1024px) {
  .main-nav {
    display: flex;
  }
  .menu-btn,
  .mobile-nav {
    display: none !important;
  }
}

/* ------------------------------- подвал ------------------------------- */

.site-footer {
  margin-top: 6rem;
  border-top: 1px solid color-mix(in oklab, var(--border) 60%, transparent);
  background-color: var(--surface);
}

.footer-grid {
  display: grid;
  gap: 2rem;
  padding: 3rem 0;
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.footer-grid h2 {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
}

.footer-grid ul li {
  margin-top: 0.25rem;
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

.footer-grid ul li a,
.footer-grid ul li span {
  display: inline-block;
  padding: 0.375rem 0;
}

.footer-grid a:hover {
  color: var(--foreground);
}

.link {
  color: var(--primary);
}

.link:hover {
  text-decoration: underline;
}

/* ------------------------------- герой ------------------------------- */

.page-hero {
  border-bottom: 1px solid color-mix(in oklab, var(--border) 50%, transparent);
  padding: 3.5rem 0;
}

.page-hero h1 {
  margin-top: 0.75rem;
  max-width: 48rem;
  font-size: clamp(2.25rem, 5vw, 3rem);
  font-weight: 700;
}

.page-hero p {
  margin-top: 1rem;
  max-width: 42rem;
  color: var(--muted-foreground);
  font-size: 1.0625rem;
}

.home-hero {
  position: relative;
  overflow: hidden;
}

.home-hero__img {
  position: absolute;
  inset: 0 0 0 auto;
  height: 100%;
  width: 100%;
  object-fit: cover;
  opacity: 0.7;
  pointer-events: none;
}

.home-hero__veil {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(
    to right,
    var(--background),
    color-mix(in oklab, var(--background) 85%, transparent),
    transparent
  );
}

.home-hero__body {
  position: relative;
  padding-block: 5rem;
}

.home-hero__body h1 {
  margin-top: 1rem;
  max-width: 32rem;
  font-size: clamp(3rem, 7vw, 3.75rem);
  font-weight: 700;
}

.home-hero__body .lead {
  margin-top: 1.25rem;
  max-width: 28rem;
  color: var(--muted-foreground);
  font-size: 1.0625rem;
}

.hero-actions {
  margin-top: 2.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

@media (max-width: 639px) {
  .home-hero__img {
    opacity: 0.45;
  }
  .home-hero__veil {
    background-image: linear-gradient(
      to bottom,
      var(--background),
      color-mix(in oklab, var(--background) 78%, transparent) 55%,
      color-mix(in oklab, var(--background) 62%, transparent)
    );
  }
}

@media (min-width: 640px) {
  .home-hero__img {
    width: 62%;
  }
  .home-hero__body {
    padding-block: 7rem;
  }
}

/* ------------------------------- прочее ------------------------------- */

.feature-panel {
  margin-top: -2.5rem;
  padding: 1.5rem;
}

@media (min-width: 640px) {
  .feature-panel {
    padding: 2.5rem;
  }
}

.section-cards h3,
.section-cards h2 {
  font-weight: 700;
}

.timeline {
  margin-top: 2.5rem;
  border-left: 1px solid color-mix(in oklab, var(--border) 60%, transparent);
  padding-left: 1.5rem;
  display: grid;
  gap: 1.25rem;
}

.timeline > li {
  position: relative;
}

.timeline-dot {
  position: absolute;
  left: -31px;
  top: 1.5rem;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 999px;
  background-color: var(--leaf);
  box-shadow: 0 0 0 4px var(--background);
}

.search-field {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background-color: var(--card);
  padding: 0.75rem 1.25rem;
  color: var(--muted-foreground);
}

.search-field input {
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--foreground);
  font: inherit;
  outline: none;
}

/* аккордеон FAQ */
.accordion {
  margin-top: 2rem;
  display: grid;
  gap: 0.75rem;
}

.accordion details {
  border-radius: calc(var(--radius) + 4px);
  border: 1px solid color-mix(in oklab, var(--border) 60%, transparent);
  background-color: var(--card);
  padding: 0 1.25rem;
}

.accordion summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  cursor: pointer;
  list-style: none;
  padding: 1rem 0;
  font-weight: 600;
}

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

.accordion summary .chev {
  transition: transform 0.2s ease;
}

.accordion details[open] summary .chev {
  transform: rotate(180deg);
}

.accordion .answer {
  padding-bottom: 1.25rem;
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

/* галерея скриншотов + модалка */
.shot-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 17rem), 1fr));
}

.shot {
  overflow: hidden;
  border-radius: calc(var(--radius) + 12px);
  border: 1px solid color-mix(in oklab, var(--border) 60%, transparent);
  background-color: var(--card);
  text-align: left;
  padding: 0;
  color: inherit;
  cursor: zoom-in;
  box-shadow: var(--shadow-soft);
}

.shot img {
  aspect-ratio: 16 / 10;
  width: 100%;
  display: block;
  object-fit: cover;
  background-color: oklch(0.2 0.02 250);
}

.shot .body {
  padding: 1rem 1.125rem 1.25rem;
}

.lightbox {
  border: 1px solid var(--border);
  background-color: var(--card);
  border-radius: calc(var(--radius) + 8px);
  padding: 0.75rem;
  max-width: 56rem;
  width: 92vw;
  color: var(--foreground);
}

.lightbox::backdrop {
  background: oklch(0.12 0.03 158 / 0.75);
}

.lightbox img {
  width: auto;
  max-width: 100%;
  max-height: 78vh;
  display: block;
  margin: 0.5rem auto 0;
  object-fit: contain;
  border-radius: var(--radius);
}

.lightbox .close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background-color: var(--card);
  color: var(--foreground);
  padding: 0.375rem;
  display: flex;
}

/* руководство */
.guide-layout {
  display: grid;
  gap: 2rem;
}

@media (min-width: 1024px) {
  .guide-layout {
    grid-template-columns: 1fr 260px;
  }
  .guide-toc {
    position: sticky;
    top: 6rem;
    height: max-content;
  }
}

.guide-body {
  padding: 2rem;
}

@media (min-width: 640px) {
  .guide-body {
    padding: 2.5rem;
  }
}

.guide-section {
  margin-top: 2.5rem;
  scroll-margin-top: 6rem;
}

.guide-section p {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  color: var(--muted-foreground);
  line-height: 1.7;
}

.guide-section .bullets li {
  display: flex;
  gap: 0.75rem;
  border-radius: 0.75rem;
  background-color: color-mix(in oklab, var(--background) 40%, transparent);
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  color: var(--muted-foreground);
  margin-top: 0.625rem;
}

.video-frame {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--radius);
  background-color: color-mix(in oklab, var(--background) 60%, transparent);
}

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

.bark-panel {
  background-color: color-mix(in oklab, var(--bark) 40%, transparent);
  border: 1px solid color-mix(in oklab, var(--border) 60%, transparent);
  border-radius: calc(var(--radius) + 20px);
  padding: 2rem;
}

.numbered {
  font-family: var(--font-display);
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--primary);
}

.stack > * + * {
  margin-top: 1.5rem;
}

.mt-1 {
  margin-top: 0.375rem;
}
.mt-2 {
  margin-top: 0.75rem;
}
.mt-3 {
  margin-top: 1rem;
}
.mt-4 {
  margin-top: 1.5rem;
}
.mt-5 {
  margin-top: 2rem;
}
.mt-6 {
  margin-top: 2.5rem;
}

.h2 {
  font-size: 1.875rem;
  font-weight: 700;
}

.h3 {
  font-size: 1.25rem;
  font-weight: 600;
}

.h4 {
  font-size: 1rem;
  font-weight: 600;
}

.row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.center {
  text-align: center;
}

.notfound {
  display: flex;
  min-height: 60vh;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}