/* Twitchalize landing – plain CSS, no Tailwind */

:root {
  --color-bg: #fafafa;
  --color-bg-elevated: #f4f4f5;
  --color-bg-header: #fafafa;
  --color-border: #e4e4e7;
  --color-text: #3f3f46;
  --color-text-muted: #71717a;
  --color-accent: #7c3aed;
  --color-accent-hover: #6d28d9;
  --color-accent-light: #ede9fe;
  --color-hero-gradient-from: #5b21b6;
  --color-hero-gradient-to: #7c3aed;
  --color-card-bg: #f4f4f5;
  --color-card-border: #fff;
  --color-nav-hover: #6d28d9;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --font-sans: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not(.theme-light) {
    --color-bg: #0c0c0f;
    --color-bg-elevated: #18181b;
    --color-bg-header: #18181b;
    --color-border: #27272a;
    --color-text: #e4e4e7;
    --color-text-muted: #a1a1aa;
    --color-accent: #a78bfa;
    --color-accent-hover: #c4b5fd;
    --color-accent-light: rgba(167, 139, 250, 0.15);
    --color-hero-gradient-from: #a78bfa;
    --color-hero-gradient-to: #c4b5fd;
    --color-card-bg: rgba(255, 255, 255, 0.02);
    --color-card-border: rgba(255, 255, 255, 0.08);
    --color-nav-hover: #c4b5fd;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  }
}

html.dark,
html.theme-dark {
  --color-bg: #0c0c0f;
  --color-bg-elevated: #18181b;
  --color-bg-header: #18181b;
  --color-border: #27272a;
  --color-text: #e4e4e7;
  --color-text-muted: #a1a1aa;
  --color-accent: #a78bfa;
  --color-accent-hover: #c4b5fd;
  --color-accent-light: rgba(167, 139, 250, 0.15);
  --color-hero-gradient-from: #a78bfa;
  --color-hero-gradient-to: #c4b5fd;
  --color-card-bg: rgba(255, 255, 255, 0.02);
  --color-card-border: rgba(255, 255, 255, 0.08);
  --color-nav-hover: #c4b5fd;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

/* Layout */
.container {
  width: 100%;
  max-width: 80rem;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

@media (min-width: 1024px) {
  .container { padding-left: 1.5rem; padding-right: 1.5rem; }
}

/* Header */
.page-header {
  position: relative;
  z-index: 40;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-header);
}

.page-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  padding: 0 1.5rem;
}

@media (min-width: 1024px) {
  .page-header__inner { padding-left: 0; padding-right: 0; }
}

.logo {
  display: inline-flex;
  align-items: center;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-text);
  margin-right: auto;
}

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

.nav-desktop {
  display: none;
}

@media (min-width: 1024px) {
  .nav-desktop {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 3rem;
    margin-left: auto;
  }
}

.nav-desktop a {
  display: flex;
  align-items: center;
  padding: 1.5rem 0;
  color: var(--color-text);
  border-bottom: none;
  transition: color 0.15s ease;
}

.nav-desktop a:hover {
  color: var(--color-nav-hover);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-left: auto;
}

@media (min-width: 1024px) {
  .header-actions { margin-left: 2rem; }
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  border-radius: 0.375rem;
}

.theme-toggle:hover {
  color: var(--color-text);
}

.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  margin: 0 -1.5rem 0 0;
  background: var(--color-bg-elevated);
  border: none;
  border-left: 1px solid var(--color-border);
  color: var(--color-text);
  cursor: pointer;
}

@media (min-width: 1024px) {
  .menu-toggle { display: none; }
}

.menu-toggle:hover {
  background: var(--color-border);
}

/* Mobile nav */
.nav-mobile {
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  background: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
  padding: 0 1.5rem;
  display: none;
}

.nav-mobile.is-open {
  display: block;
}

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

.nav-mobile a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}

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

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

/* Theme dropdown */
.theme-dropdown {
  position: relative;
}

.theme-dropdown__menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 0.25rem;
  min-width: 10rem;
  padding: 0.25rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  box-shadow: var(--shadow-sm);
  display: none;
  z-index: 50;
}

.theme-dropdown__menu.is-open {
  display: block;
}

.theme-dropdown__menu button {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 0.375rem 0.75rem;
  border: none;
  border-radius: 0.375rem;
  background: transparent;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  cursor: pointer;
  text-align: left;
}

.theme-dropdown__menu button:hover {
  background: var(--color-bg-elevated);
  color: var(--color-text);
}

.theme-dropdown__menu button.is-active {
  color: var(--color-accent);
}

.theme-dropdown__menu .material-symbols-outlined {
  margin-right: 0.5rem;
  font-size: 1.125rem;
}

/* Hero */
.hero-wrap {
  border-bottom: 1px solid var(--color-border);
  margin-bottom: -8rem;
  background: radial-gradient(ellipse at top, var(--color-bg-elevated), var(--color-bg));
}

.hero {
  padding-top: 8rem;
  padding-bottom: 12rem;
  text-align: center;
}

@media (min-width: 1024px) {
  .hero { padding-bottom: 16rem; }
}

.hero h1 {
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-text);
  max-width: 56ch;
  margin: 0 auto 1rem;
  letter-spacing: -0.02em;
}

@media (min-width: 1024px) {
  .hero h1 {
    font-size: 2.25rem;
    line-height: 1.25;
  }
}

.hero h1 .gradient {
  background: linear-gradient(90deg, var(--color-hero-gradient-from), var(--color-hero-gradient-to));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  max-width: 48ch;
  margin: 0 auto 3rem;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text-muted);
}

@media (min-width: 1024px) {
  .hero p {
    font-size: 1.25rem;
    line-height: 1.6;
  }
}

.hero-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .hero-actions {
    flex-direction: row;
    justify-content: center;
  }
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: #fff;
  background: var(--color-accent);
  border: 1px solid transparent;
  border-radius: 0.375rem;
  text-decoration: none;
  transition: background 0.15s ease;
  width: 100%;
}

@media (min-width: 768px) {
  .btn-primary { width: auto; }
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
}

.btn-primary .material-symbols-outlined {
  margin-left: 0.5rem;
  font-size: 1.125rem;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 0.375rem;
  text-decoration: none;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
  width: 100%;
}

@media (min-width: 768px) {
  .btn-secondary { width: auto; }
}

.btn-secondary:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: var(--color-accent-light);
}

/* Features strip (3 columns) */
.features-strip {
  border-bottom: 1px solid var(--color-border);
  padding: 4rem 1rem;
}

@media (min-width: 1024px) {
  .features-strip {
    padding-bottom: 8rem;
    padding-top: 4rem;
  }
}

.features-strip__grid {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

@media (min-width: 1024px) {
  .features-strip__grid {
    flex-direction: row;
    gap: 2rem;
  }
}

.features-strip__col {
  flex: 1;
  min-width: 0;
}

.features-strip__accent {
  height: 1px;
  background: var(--color-border);
  margin-bottom: 1.5rem;
}

.features-strip__accent::after {
  content: "";
  display: block;
  width: 50%;
  height: 1px;
  background: var(--color-accent);
}

.features-strip h2 {
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.5;
  color: var(--color-text);
  margin: 0 0 1rem;
}

.features-strip p {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text-muted);
  margin: 0 0 1rem;
}

.features-strip a {
  display: inline-flex;
  align-items: center;
  font-size: 1rem;
  color: var(--color-accent);
}

.features-strip a .material-symbols-outlined {
  margin-left: 0.25rem;
  font-size: 1.125rem;
}

/* Section: Функции и возможности */
.section-features {
  padding: 3.5rem 1rem;
}

@media (min-width: 1024px) {
  .section-features {
    padding-top: 3.5rem;
    padding-bottom: 3.5rem;
  }
}

.section-features__header {
  text-align: center;
  max-width: 48ch;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 3.5rem;
}

.section-features__header h2 {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--color-text);
  margin: 0 0 1rem;
}

@media (min-width: 1024px) {
  .section-features__header h2 { font-size: 1.5rem; }
}

.section-features__header p {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text-muted);
  margin: 0;
}

@media (min-width: 1024px) {
  .section-features__header p {
    font-size: 1.125rem;
    line-height: 1.6;
  }
}

.features-grid {
  display: grid;
  gap: 2rem;
}

@media (min-width: 768px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .features-grid { grid-template-columns: repeat(3, 1fr); }
}

.feature-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem 1rem;
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: 0.375rem;
  transition: background 0.15s ease;
}

.feature-card:hover {
  background: var(--color-bg-elevated);
}

.feature-card__icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  background: var(--color-card-border);
  border: 1px solid var(--color-border);
  border-radius: 0.375rem;
  color: var(--color-accent);
}

.feature-card__icon .material-symbols-outlined {
  font-size: 1.25rem;
}

.feature-card h3 {
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.4;
  color: var(--color-text);
  margin: 0 0 0.25rem;
}

.feature-card p {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text-muted);
  margin: 0;
}

/* Footer */
.page-footer {
  padding: 3rem 1rem;
  border-top: 1px solid var(--color-border);
}

.page-footer p {
  margin: 0;
  font-size: 1rem;
  color: var(--color-text-muted);
}

.page-footer a {
  color: var(--color-accent);
  text-decoration: underline;
}

/* Utility */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}