/*
 * Base design tokens, reset, typography and layout primitives.
 * Ported 1:1 from `DESIGN.md` / `app/frontend/src/theme/tokens.ts` ("NatalQ ai"
 * system, v2) — a light theme with a solid indigo/violet primary color, no
 * gradients, generous rounding, hairline borders instead of shadows. Keep
 * this file's tokens in sync with the app; don't hardcode hex values or raw
 * sizes in templates/other stylesheets — always go through these variables.
 */

/* --- Fonts (self-hosted Inter variable font, weights 400-700) ----------- */

@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url("../fonts/inter/inter-latin-var.260c81a4759b.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329,
    U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url("../fonts/inter/inter-latin-ext-var.1ad231aac0a8.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329,
    U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url("../fonts/inter/inter-cyrillic-var.de93fdc85e3d.woff2") format("woff2");
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}

:root {
  /* Colors -- brand */
  --color-primary: #5d4fe0;
  --color-primary-pressed: #4b3fc7;
  --color-primary-soft: #efebfc;
  --color-on-primary: #ffffff;

  /* Colors -- text */
  --color-ink: #17151f;
  --color-ink-secondary: #3a3847;
  --color-body: #5f5d6e;
  --color-body-mid: #8b8998;
  --color-mute: #a7a5b3;

  /* Colors -- surface */
  --color-canvas: #ffffff;
  --color-canvas-soft: #f8f7fc;
  --color-canvas-card: #ffffff;
  --color-canvas-elevated: #faf9fd;
  --color-hairline: #e9e6f2;
  --color-hairline-soft: #f2f0f9;

  /* Colors -- semantic accents (feature/report icon badges) */
  --color-accent-purple: #6c5ce7;
  --color-accent-purple-soft: #efebfc;
  --color-accent-blue: #4f8ef7;
  --color-accent-blue-soft: #e8f0fe;
  --color-accent-gold: #f5b942;
  --color-accent-gold-soft: #fdf3dc;
  --color-accent-orange: #ff8a42;
  --color-accent-orange-soft: #ffedd9;
  --color-accent-pink: #ff5c9e;
  --color-accent-pink-soft: #ffe6f0;

  --color-success: #22c55e;
  --color-warning: #f5a524;
  --color-danger: #f04452;
  --color-danger-soft: #fde8e9;

  /* Spacing (4px base unit) */
  --space-xxs: 2px;
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-lg: 16px;
  --space-xl: 24px;
  --space-2xl: 32px;
  --space-3xl: 48px;
  --space-4xl: 64px;

  /* Radius */
  --radius-xs: 8px;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --radius-pill: 9999px;

  /* Typography */
  --font-display: "Inter", -apple-system, "Segoe UI", Roboto, system-ui, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background-color: var(--color-canvas);
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 24px;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

/* --- Typography scale --------------------------------------------------
   Sizes keep the landing's existing marketing scale (a hero headline reads
   small at the app's 40px card-sized cap); weight, line-height and tracking
   follow the app's formula -- bold/semibold display faces, generous
   line-height, tracking that eases off at smaller sizes. */

.display-xl,
.display-lg,
.display-md,
.display-sm,
.display-xs {
  font-family: var(--font-display);
  margin: 0;
  color: var(--color-ink);
}

.display-xl {
  font-size: 96px;
  line-height: 108px;
  font-weight: 700;
  letter-spacing: -2.4px;
}

.display-lg {
  font-size: 72px;
  line-height: 82px;
  font-weight: 700;
  letter-spacing: -1.8px;
}

.display-md {
  font-size: 48px;
  line-height: 56px;
  font-weight: 600;
  letter-spacing: -1.2px;
}

.display-sm {
  font-size: 32px;
  line-height: 40px;
  font-weight: 600;
  letter-spacing: -0.6px;
}

.display-xs {
  font-size: 20px;
  line-height: 28px;
  font-weight: 600;
}

.body-lg {
  font-size: 18px;
  line-height: 28px;
}

/* Inline in-copy links to blog articles (money/purpose/relationships/
   forecast/solution sections) -- `a { color: inherit }` above would
   otherwise blend these into the surrounding ink-colored paragraph with
   only an underline as a clue. */
.body-lg a {
  color: var(--color-primary);
}

.body-md {
  font-size: 16px;
  line-height: 24px;
}

.body-sm {
  font-size: 14px;
  line-height: 20px;
}

.eyebrow-mono {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 18px;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--color-mute);
  display: inline-block;
  margin: 0 0 var(--space-lg);
}

p {
  color: var(--color-body);
  margin: 0 0 var(--space-lg);
}

/* --- Layout ------------------------------------------------------------ */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section {
  padding: var(--space-4xl) 0;
}

.hairline-top {
  border-top: 1px solid var(--color-hairline);
}

.hairline-bottom {
  border-bottom: 1px solid var(--color-hairline);
}

/* --- Buttons ------------------------------------------------------------ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-size: 15px;
  line-height: 20px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  padding: var(--space-sm) var(--space-lg);
  min-height: 44px;
  cursor: pointer;
  transition: opacity 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-pressed);
  border-color: var(--color-primary-pressed);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-ink);
  border-color: var(--color-hairline);
}

.btn-outline:hover {
  background-color: var(--color-canvas-soft);
}

.btn-sm {
  padding: var(--space-xs) var(--space-md);
  min-height: 36px;
  font-size: 14px;
}

/* --- Cards --------------------------------------------------------------- */

.card {
  background-color: var(--color-canvas-card);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

/* --- Brand wordmark --------------------------------------------------------
   Matches the app's own Wordmark component 1:1 (app/frontend/src/components/
   common/Wordmark.tsx): "Natal" in ink, "Q" in the accent orange, "ai" in
   the primary indigo, Inter 700. Used for both the header and footer brand
   marks, each pairing it with a small uppercase gray tagline underneath. */

.brand-wordmark {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1;
}

.brand-wordmark--md {
  font-size: 22px;
  letter-spacing: -0.4px;
}

.brand-wordmark--sm {
  font-size: 15px;
  letter-spacing: -0.3px;
}

.brand-wordmark__natal {
  color: var(--color-ink);
}

.brand-wordmark__q {
  color: var(--color-accent-orange);
}

.brand-wordmark__ai {
  color: var(--color-primary);
}

.brand-tagline {
  display: block;
  margin-top: var(--space-xxs);
  font-family: var(--font-display);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  color: var(--color-body-mid);
}

/* --- Navigation ----------------------------------------------------------- */

.nav-bar {
  background-color: var(--color-canvas);
  border-bottom: 1px solid var(--color-hairline);
  padding: var(--space-md) var(--space-xl);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav-bar__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.nav-bar__brand {
  display: flex;
  flex-direction: column;
  text-decoration: none;
}

/* No visible focus/click ring on the logo at all — the :not(:focus-visible)
   approach tried before this depends on browser :focus-visible heuristics
   for a plain link, which aren't consistent enough in practice to keep the
   outline gone in every browser. */
.nav-bar__brand,
.footer__brand,
.nav-bar__brand:focus,
.footer__brand:focus,
.nav-bar__brand:focus-visible,
.footer__brand:focus-visible,
.nav-bar__brand:active,
.footer__brand:active {
  outline: none;
  border: none;
  box-shadow: none;
}

.nav-bar__links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  color: var(--color-body);
  font-size: 14px;
  line-height: 20px;
  text-decoration: none;
}

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

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

/* Hamburger/close buttons only ever appear below the .nav-bar__nav
   full-screen-overlay breakpoint -- see the media query below. */
.nav-bar__menu-toggle,
.nav-bar__close {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: none;
  background: none;
  color: var(--color-ink);
  cursor: pointer;
}

.nav-bar__menu-toggle svg,
.nav-bar__close svg {
  width: 24px;
  height: 24px;
}

.nav-bar__nav-header {
  display: none;
}

/* --- Footer ------------------------------------------------------------- */

.footer {
  background-color: var(--color-canvas);
  border-top: 1px solid var(--color-hairline);
  color: var(--color-body);
  padding: var(--space-3xl) var(--space-xl) 0;
  font-size: 14px;
  line-height: 20px;
}

.footer__inner--expanded {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr repeat(4, 1fr);
  gap: var(--space-xl);
  align-items: start;
}

.footer__brand {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  margin-bottom: var(--space-sm);
}

.footer__brand-desc {
  color: var(--color-body-mid);
  max-width: 40ch;
}

.footer__brand-email {
  display: inline-block;
  margin-top: var(--space-sm);
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
}

.footer__brand-email:hover {
  text-decoration: underline;
}

.footer__col-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
  margin: 0 0 var(--space-md);
}

.footer__col-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer__col-links a {
  color: var(--color-body-mid);
  text-decoration: none;
}

.footer__col-links a:hover {
  color: var(--color-primary);
}

.footer__bottom {
  border-top: 1px solid var(--color-hairline);
  margin-top: var(--space-2xl);
}

.footer__bottom-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-lg) 0;
  text-align: center;
}

.footer__disclaimer {
  color: var(--color-mute);
  max-width: 70ch;
  margin: 0 auto var(--space-sm);
}

.footer__copyright {
  color: var(--color-mute);
  margin: 0;
}

/* --- Responsive ------------------------------------------------------------ */

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

  .section {
    padding: var(--space-3xl) 0;
  }

  .display-xl {
    font-size: 48px;
    line-height: 54px;
    letter-spacing: -1.2px;
  }

  .display-lg {
    font-size: 40px;
    line-height: 46px;
    letter-spacing: -0.8px;
  }

  .display-md {
    font-size: 32px;
    line-height: 38px;
    letter-spacing: -0.6px;
  }

  .nav-bar__menu-toggle {
    display: flex;
  }

  /* Desktop-only subtitle -- dropping it on mobile leaves enough width for
     the CTA button to stay on one line (see .btn's white-space: nowrap)
     without the wordmark and button colliding at phone widths. */
  .nav-bar__brand .brand-tagline {
    display: none;
  }

  /* Off the normal flex flow once fixed, so .nav-bar__inner is left with
     just the logo + actions -- exactly the "logo + Начать бесплатно only"
     mobile header this is meant to produce. */
  .nav-bar__nav {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 100;
    flex-direction: column;
    background-color: var(--color-canvas);
    padding: var(--space-lg) var(--space-xl);
    overflow-y: auto;
  }

  .nav-bar__nav.is-open {
    display: flex;
  }

  .nav-bar__nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-2xl);
  }

  .nav-bar__close {
    display: flex;
  }

  .nav-bar__links {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xl);
  }

  .nav-bar__links .nav-link {
    font-size: 20px;
    line-height: 28px;
  }

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

  .footer__brand-col {
    grid-column: 1 / -1;
  }
}

/* Prevents the page behind the full-screen mobile nav from scrolling while
   it's open (toggled by nav-menu.js alongside .nav-bar__nav.is-open). */
body.nav-menu-open {
  overflow: hidden;
}

@media (max-width: 480px) {
  .footer__inner--expanded {
    grid-template-columns: 1fr;
  }
}