/* ============================================================
   BASE — design system
   Tokens, reset, typography, buttons, nav, footer.
   Rules that matter:
     · amber is CTA-only. Never decorative.
     · three section tones: plain / tint / accent. Accent twice max.
     · one icon system: inline Lucide, stroke: currentColor.
   ============================================================ */

:root {
  /* ── Blues: structure, hierarchy, everything non-CTA ── */
  --blue-50: #eff6ff;
  --blue-100: #dbeafe;
  --blue-200: #bfdbfe;
  --blue-300: #93c5fd;
  --blue-400: #60a5fa;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;
  --blue-800: #1e40af;
  --blue-950: #131f45;

  /* ── Amber: CTA ONLY ── */
  --amber-500: #f59e0b;
  --amber-600: #d97706;

  /* ── Neutrals ── */
  --white: #ffffff;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-900: #111827;

  --font-head: "Nunito", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;

  /* ── Type scale ── */
  --fs-xs: 0.8125rem;
  --fs-sm: 1rem;
  --fs-base: 1.0625rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.25rem;
  --fs-h3: 1.4rem;
  --fs-h2: clamp(1.75rem, 1.2rem + 2.2vw, 2.5rem);
  --fs-h1: clamp(2.05rem, 1.2rem + 3.6vw, 3.35rem);
  --fs-num: clamp(2.25rem, 1.4rem + 3vw, 3.25rem);

  /* ── Space scale ── */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.5rem;
  --sp-6: 2rem;
  --sp-7: 2.5rem;
  --sp-8: 3rem;
  --sp-9: 4rem;
  --sp-10: 5rem;

  --section-y: clamp(2.5rem, 1.2rem + 5vw, 6rem);
  --gutter: clamp(1.25rem, 0.75rem + 2vw, 2rem);
  --maxw: 1140px;

  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 24px;
  --r-full: 999px;

  --sh-sm: 0 1px 3px rgba(16, 32, 72, 0.06), 0 4px 16px rgba(16, 32, 72, 0.05);
  --sh-md:
    0 4px 12px rgba(16, 32, 72, 0.07), 0 12px 36px rgba(16, 32, 72, 0.07);
  --sh-lg: 0 8px 24px rgba(16, 32, 72, 0.1), 0 24px 64px rgba(16, 32, 72, 0.1);

  --t: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset ─────────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.65;
  color: var(--gray-700);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  /* Unbreakable strings — t.me/tgenina, an email, a long Russian compound —
     otherwise push the layout past a 320px screen. */
  overflow-wrap: break-word;
}

img,
svg {
  display: block;
  max-width: 100%;
}
/* width/height attrs reserve layout space; without this the attribute
   height is used literally and any CSS-sized image gets stretched. */
img {
  height: auto;
}
a {
  color: inherit;
  text-decoration: none;
}
ul,
ol {
  list-style: none;
}
button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}
:focus-visible {
  outline: 3px solid var(--blue-400);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ── Icons: one system ─────────────────────────────────── */
.ico {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.ico--sm {
  width: 18px;
  height: 18px;
  stroke-width: 2;
}
.ico--lg {
  width: 28px;
  height: 28px;
  stroke-width: 1.6;
}

/* ── Layout ────────────────────────────────────────────── */
.section {
  padding: var(--section-y) var(--gutter);
}
/* Anchored headings must clear everything stuck to the top — the nav plus the
   amber strip, which is two lines tall on a phone. --sticky-top is measured at
   runtime; the fallback covers the nav alone, in case the script never runs. */
[id] {
  scroll-margin-top: var(--sticky-top, 84px);
}
.wrap {
  max-width: var(--maxw);
  margin-inline: auto;
}
.wrap--narrow {
  max-width: 780px;
  margin-inline: auto;
}

/* Section tones — the only three backgrounds on the page */
.s-plain {
  background: var(--white);
}
.s-tint {
  background: var(--blue-50);
}
.s-accent {
  background: linear-gradient(160deg, var(--blue-800) 0%, var(--blue-950) 100%);
  color: #e4ecff;
}

/* ── Typography ────────────────────────────────────────── */
h1,
h2,
h3,
h4 {
  font-family: var(--font-head);
  color: var(--gray-900);
  line-height: 1.18;
  font-weight: 800;
}
.s-accent h1,
.s-accent h2,
.s-accent h3 {
  color: var(--white);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-xs);
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--blue-600);
  background: var(--blue-100);
  padding: 0.35rem 0.85rem;
  border-radius: var(--r-full);
  margin-bottom: var(--sp-4);
}
.s-accent .eyebrow {
  color: var(--blue-100);
  background: rgba(255, 255, 255, 0.12);
}

.h2 {
  font-size: var(--fs-h2);
  letter-spacing: -0.02em;
}
.h3 {
  font-size: var(--fs-h3);
  font-weight: 700;
}

.lede {
  font-size: var(--fs-md);
  color: var(--gray-500);
  max-width: 62ch;
  margin-top: var(--sp-3);
}
.s-accent .lede {
  color: #b9cbf5;
}

.center {
  text-align: center;
}
.center .lede {
  margin-inline: auto;
}
.section-head {
  margin-bottom: var(--sp-8);
}

/* ── Mobile card rails ─────────────────────────────────────
   Peer items (cases, reviews, formats) become a swipeable rail
   below 780px. Stacking them costs ~2,700px of scroll for
   content the reader takes in one card at a time anyway.
   NB: the default `.rail-hint { display: none }` must come
   BEFORE the media query, or it wins on source order. */
.rail-hint {
  display: none;
}
.s-accent .rail-hint {
  color: #a8bef0;
}

@media (max-width: 780px) {
  .rail {
    display: flex !important;
    grid-template-columns: none !important;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    margin-inline: calc(var(--gutter) * -1);
    padding-inline: var(--gutter);
    padding-bottom: var(--sp-2);
  }
  .rail::-webkit-scrollbar {
    display: none;
  }
  .rail > * {
    flex: 0 0 min(84%, 330px);
    scroll-snap-align: start;
  }
  .rail-hint {
    display: block;
    margin-top: var(--sp-3);
    font-size: var(--fs-xs);
    /* Arrows alone, so they need room to read as a gesture cue
       rather than as two stray glyphs. */
    letter-spacing: 0.6em;
    text-indent: 0.6em;
    color: var(--gray-500);
    text-align: center;
  }
  /* Set from JS: on a wide phone the cards can all fit, and a swipe hint
     pointing at nothing is worse than no hint. */
  .rail-hint[data-needed="false"] {
    display: none;
  }
  .section-head {
    margin-bottom: var(--sp-6);
  }
}

/* ── Buttons ───────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-sm);
  line-height: 1.2;
  padding: 0.95rem 1.75rem;
  min-height: 48px;
  border-radius: var(--r-full);
  border: 2px solid transparent;
  transition:
    background var(--t),
    border-color var(--t),
    transform var(--t),
    box-shadow var(--t);
  text-align: center;
}

/* The only amber on the page. */
.btn--cta {
  background: var(--amber-500);
  border-color: var(--amber-500);
  color: var(--white);
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.28);
}
.btn--cta:hover {
  background: var(--amber-600);
  border-color: var(--amber-600);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(245, 158, 11, 0.36);
}

.btn--ghost {
  color: var(--blue-700);
  border-color: var(--blue-200);
  background: var(--white);
}
.btn--ghost:hover {
  border-color: var(--blue-400);
  background: var(--blue-50);
  transform: translateY(-2px);
}

.btn--light {
  background: var(--white);
  border-color: var(--white);
  color: var(--blue-800);
}
.btn--light:hover {
  transform: translateY(-2px);
  box-shadow: var(--sh-md);
}

.btn--wide {
  width: 100%;
}

/* ── Nav ───────────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--gray-200);
}
.nav__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 0 var(--gutter);
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-6);
}
.nav__logo {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--blue-700);
  white-space: nowrap;
}
.nav__logo em {
  font-style: normal;
  color: var(--amber-500);
}
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
}
.nav__link {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--gray-600);
  transition: color var(--t);
}
.nav__link:hover {
  color: var(--blue-700);
}

.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  margin-right: -10px;
}
.burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--gray-700);
  border-radius: 2px;
  transition:
    transform var(--t),
    opacity var(--t);
}
.burger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.burger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.burger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 860px) {
  .burger {
    display: flex;
  }
  .nav__links {
    position: fixed;
    inset: 68px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--white);
    padding: var(--sp-2) var(--gutter) var(--sp-5);
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--sh-md);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition:
      opacity var(--t),
      transform var(--t);
  }
  .nav__links[data-open="true"] {
    opacity: 1;
    pointer-events: auto;
    transform: none;
  }
  .nav__link {
    padding: var(--sp-4) 0;
    border-bottom: 1px solid var(--gray-100);
    font-size: var(--fs-md);
  }
  .nav__cta {
    margin-top: var(--sp-4);
  }
  .nav__cta .btn {
    width: 100%;
  }
}

/* ── Sticky announcement strip ─────────────────────────────
   Sits under the nav and stays there. Deliberately flat and
   full-bleed so it reads as a banner, not as a button — amber
   otherwise means "click here" everywhere else on the page. */
.notice {
  position: sticky;
  top: 69px;              /* nav is 68px + 1px border */
  z-index: 199;
  background: var(--amber-500);
  padding: 0.45rem var(--gutter);
}
.notice__text {
  max-width: var(--maxw);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  font-size: var(--fs-xs);
  font-weight: 600;            /* white on amber is low-contrast — weight helps a little */
  line-height: 1.4;
  color: var(--white);
  text-align: center;
}
.notice__text .ico { color: rgba(255, 255, 255, 0.85); }

@media (max-width: 560px) {
  .notice { padding: 0.4rem var(--gutter); }
  .notice__text { font-size: 11px; gap: var(--sp-1); }
  .notice__text .ico { display: none; }
}

/* ── Sticky mobile CTA ─────────────────────────────────── */
.sticky-cta {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 190;
  display: none;
  padding: var(--sp-3) var(--gutter);
  padding-bottom: calc(var(--sp-3) + env(safe-area-inset-bottom));
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--gray-200);
  transform: translateY(110%);
  transition: transform 0.28s ease;
}
.sticky-cta[data-show="true"] {
  transform: none;
}
@media (max-width: 860px) {
  .sticky-cta {
    display: block;
  }
  body {
    padding-bottom: 84px;
  }
}

/* ── Footer ────────────────────────────────────────────── */
.footer {
  background: var(--blue-50);
  border-top: 1px solid var(--blue-100);
  padding: var(--sp-9) var(--gutter) var(--sp-6);
}
.footer__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.2fr;
  gap: var(--sp-8);
  padding-bottom: var(--sp-7);
  border-bottom: 1px solid var(--blue-200);
}
.footer__logo {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--blue-700);
}
.footer__logo em {
  font-style: normal;
  color: var(--amber-500);
}
.footer__tagline {
  margin-top: var(--sp-2);
  font-size: var(--fs-sm);
  color: var(--gray-500);
  max-width: 30ch;
}
.footer__legal {
  margin-top: var(--sp-4);
  font-size: var(--fs-xs);
  color: var(--gray-400);
}
.footer__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--blue-500);
  margin-bottom: var(--sp-4);
}
.footer__list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}
.footer__list a,
.footer__soc {
  font-size: var(--fs-sm);
  color: var(--gray-600);
  transition: color var(--t);
}
.footer__list a:hover,
.footer__soc:hover {
  color: var(--blue-700);
}
.footer__soc {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-3);
}
.footer__soc .soc-ico {
  width: 20px;
  height: 20px;
  color: var(--blue-500);
  transition: color var(--t);
}
.footer__soc:hover .soc-ico {
  color: var(--blue-700);
}
.footer__bottom {
  max-width: var(--maxw);
  margin: var(--sp-5) auto 0;
  font-size: var(--fs-xs);
  color: var(--gray-400);
  text-align: center;
}

@media (max-width: 780px) {
  .footer__inner {
    grid-template-columns: 1fr;
    gap: var(--sp-6);
  }
}

/* Tap targets, keyed to the input device rather than the width —
   a 1024px iPad is still a thumb, and these links sit at 20–26px
   tall by default, well under the ~44px a finger needs. */
@media (pointer: coarse) {
  .footer__list {
    gap: 0;
  }
  .footer__list a {
    display: block;
    padding: var(--sp-3) 0;
  }
  .footer__soc {
    padding: var(--sp-2) 0;
    margin-bottom: var(--sp-1);
  }
  .footer__policy {
    padding-block: var(--sp-2);
  }
}
/* Above 860 the nav bar is horizontal, so its links need the padding
   too — but only there: inside the burger menu they already carry it. */
@media (pointer: coarse) and (min-width: 861px) {
  .nav__link {
    padding-block: var(--sp-2);
  }
}

/* ── Motion ────────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 0.55s ease,
    transform 0.55s ease;
}
.reveal[data-seen="true"] {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ── Cookie notice ─────────────────────────────────────────
   Informational, not a consent gate. One line, dismissed for good.
   Sits below the sticky CTA so it never covers the primary action. */
.cookie {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 195;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--sp-3) var(--sp-4);
  padding: var(--sp-3) var(--gutter);
  padding-bottom: calc(var(--sp-3) + env(safe-area-inset-bottom));
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--gray-200);
}
.cookie[hidden] {
  display: none;
}
.cookie__text {
  font-size: var(--fs-xs);
  color: var(--gray-500);
  text-align: center;
}
.cookie__text a {
  color: var(--blue-700);
  border-bottom: 1px solid var(--blue-200);
}
.cookie__ok {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-xs);
  color: var(--blue-700);
  background: var(--blue-50);
  border: 1px solid var(--blue-200);
  border-radius: var(--r-full);
  padding: 0.45rem 1.2rem;
  min-height: 40px;
}
.cookie__ok:hover {
  background: var(--blue-100);
}

/* Below the desktop grid the bar has to stay a single row. Left to
   wrap, the button drops to its own line and the bar doubles to
   ~120px of a phone screen — for a notice nobody came here to read. */
@media (max-width: 780px) {
  .cookie {
    flex-wrap: nowrap;
    gap: var(--sp-3);
    padding-top: var(--sp-2);
    padding-bottom: calc(var(--sp-2) + env(safe-area-inset-bottom));
  }
  .cookie__text {
    font-size: 12px;
    line-height: 1.45;
    text-align: left;
    flex: 1;
    min-width: 0;
  }
  .cookie__ok {
    flex: none;
    padding: 0.35rem 1rem;
    min-height: 40px;
  }
}

/* Keep the sticky CTA clear of the notice. The bar's height depends on how the
   text wraps, so it's measured at runtime into --cookie-h rather than guessed. */
@media (max-width: 860px) {
  body[data-cookie="visible"] .sticky-cta {
    bottom: var(--cookie-h, 0px);
  }
  body[data-cookie="visible"] {
    padding-bottom: calc(84px + var(--cookie-h, 0px));
  }
}

.footer__policy {
  display: inline-block;
  margin-top: var(--sp-3);
  font-size: var(--fs-xs);
  color: var(--gray-500);
  border-bottom: 1px solid var(--gray-300);
}
.footer__policy:hover {
  color: var(--blue-700);
}

/* ── Short viewports (phone in landscape) ──────────────────
   At 375px tall the nav, the amber strip, the sticky CTA and the
   cookie bar together claimed 256px — 68% of the screen — leaving
   about four lines of the actual page visible. Everything sticky
   gets compressed, and the strip stops following the scroll: it
   still greets people at the top, it just isn't worth a permanent
   seventh of a landscape screen. */
@media (max-height: 500px) and (orientation: landscape) {
  .nav__inner {
    height: 52px;
  }
  .nav__links {
    inset-block-start: 52px;
    max-height: calc(100vh - 52px);
    overflow-y: auto;
  }
  .notice {
    position: static;
  }
  .notice__text {
    font-size: 12px;
  }
  .sticky-cta {
    padding-top: var(--sp-2);
    padding-bottom: calc(var(--sp-2) + env(safe-area-inset-bottom));
  }
  .sticky-cta .btn {
    padding-block: 0.55rem;
  }
  body {
    padding-bottom: 68px;
  }
}