/* ========================================================================== */
/* RU: base.css — базовый слой, reset, токены, типографика и общие элементы   */
/* EN: base.css — base layer, reset, tokens, typography and common elements   */
/* ========================================================================== */

/* ========================================================================== */
/* RU: Сброс и базовая нормализация                                           */
/* EN: Reset and base normalization                                           */
/* ========================================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  min-height: 100vh;
  font-family: "Inter", sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

img {
  height: auto;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  padding: 0;
  background: transparent;
  border: 0;
  cursor: pointer;
}

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

ul,
ol {
  padding-left: 1.2rem;
}

ul[class],
ol[class] {
  padding-left: 0;
  list-style: none;
}

:focus-visible {
  outline: 2px solid rgba(0, 107, 255, 0.55);
  outline-offset: 3px;
}

/* ========================================================================== */
/* RU: Токены проекта                                                         */
/* EN: Project tokens                                                         */
/* ========================================================================== */
:root {
  --color-bg: #edf4fb;
  --color-bg-soft: #f6faff;
  --color-surface: rgba(255, 255, 255, 0.88);
  --color-surface-strong: rgba(255, 255, 255, 0.96);
  --color-surface-muted: rgba(246, 250, 255, 0.92);

  --color-text: #12314d;
  --color-text-muted: #5f7489;
  --color-text-soft: #8091a2;

  --color-primary: #006bff;
  --color-primary-hover: #0057d1;
  --color-primary-active: #0046a8;

  --color-border: rgba(11, 53, 88, 0.08);
  --color-border-strong: rgba(11, 53, 88, 0.14);

  --shadow-xs: 0 8px 20px rgba(16, 53, 92, 0.06);
  --shadow-sm: 0 16px 38px rgba(16, 53, 92, 0.08);
  --shadow-md: 0 24px 54px rgba(16, 53, 92, 0.12);
  --shadow-lg: 0 34px 74px rgba(16, 53, 92, 0.16);

  --radius-sm: 14px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --radius-xl: 32px;

  --container-width: 1240px;
  --container-padding: 24px;

  --transition: 220ms ease;
}

/* ========================================================================== */
/* RU: Базовая типографика                                                    */
/* EN: Base typography                                                        */
/* ========================================================================== */
body,
p,
li,
input,
textarea,
label {
  font-size: 1rem;
}

p {
  max-width: 72ch;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--color-text);
  line-height: 1.1;
  font-weight: 800;
  text-wrap: balance;
}

.section-title {
  max-width: 16ch;
  margin: 0 auto 16px;
  font-size: clamp(2rem, 1.7rem + 1.2vw, 3rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
  text-align: center;
}

.text-accent {
  color: var(--color-primary);
}

.section-description {
  max-width: 62ch;
  margin: 0 auto;
  font-size: 1.02rem;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(0, 107, 255, 0.10);
  color: var(--color-primary);
  font-size: 0.8rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ========================================================================== */
/* RU: Контейнеры и общие utility-классы                                      */
/* EN: Containers and shared utility classes                                  */
/* ========================================================================== */
.container {
  width: min(100% - (var(--container-padding) * 2), var(--container-width));
  margin-inline: auto;
}

.text-center {
  text-align: center;
}

/* ========================================================================== */
/* RU: Базовый слой кнопок                                                    */
/* EN: Base button layer                                                      */
/* ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.96rem;
  line-height: 1;
  font-weight: 800;
  white-space: nowrap;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  user-select: none;
  transition:
    color var(--transition),
    background-color var(--transition),
    border-color var(--transition),
    box-shadow var(--transition),
    transform var(--transition),
    opacity var(--transition);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn--primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #ffffff;
  box-shadow: 0 14px 30px rgba(0, 107, 255, 0.22);
}

.btn--primary:hover,
a.btn--primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: #ffffff;
  box-shadow: 0 18px 34px rgba(0, 107, 255, 0.26);
}

.btn--primary:active,
a.btn--primary:active {
  background: var(--color-primary-active);
  border-color: var(--color-primary-active);
  color: #ffffff;
}

.btn--secondary {
  background: rgba(255, 255, 255, 0.86);
  border-color: rgba(11, 53, 88, 0.10);
  color: var(--color-text);
  box-shadow: var(--shadow-xs);
}

.btn--secondary:hover,
a.btn--secondary:hover {
  background: rgba(255, 255, 255, 0.98);
  border-color: rgba(0, 107, 255, 0.16);
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.btn--secondary:active,
a.btn--secondary:active {
  background: rgba(240, 246, 255, 0.96);
  border-color: rgba(0, 107, 255, 0.22);
  color: var(--color-primary-active);
}

.btn:focus-visible {
  outline: none;
  box-shadow:
    0 0 0 4px rgba(0, 107, 255, 0.14),
    0 14px 30px rgba(16, 53, 92, 0.10);
}

.btn--primary:focus-visible {
  box-shadow:
    0 0 0 4px rgba(0, 107, 255, 0.16),
    0 18px 34px rgba(0, 107, 255, 0.24);
}

/* ========================================================================== */
/* RU: Базовые состояния ссылок и интерактивных элементов                     */
/* EN: Base states for links and interactive elements                         */
/* ========================================================================== */
a,
button,
input,
textarea,
select {
  transition:
    color var(--transition),
    background-color var(--transition),
    border-color var(--transition),
    box-shadow var(--transition),
    transform var(--transition),
    opacity var(--transition);
}

a:hover:not(.btn) {
  color: var(--color-primary);
}

/* ========================================================================== */
/* RU: Служебные состояния                                                    */
/* EN: Utility states                                                         */
/* ========================================================================== */
.skip-link {
  position: absolute;
  left: 16px;
  top: 12px;
  z-index: 200;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--color-primary);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
  transform: translateY(-120%);
  transition: transform var(--transition);
}

.skip-link:focus {
  transform: translateY(0);
}

[hidden] {
  display: none !important;
}

/* ========================================================================== */
/* RU: Адаптивность базового слоя                                             */
/* EN: Base layer responsiveness                                              */
/* ========================================================================== */
@media (max-width: 920px) {
  :root {
    --container-padding: 20px;
  }

  .section-title {
    max-width: 18ch;
    font-size: clamp(1.8rem, 1.55rem + 1vw, 2.5rem);
  }

  .section-description {
    font-size: 1rem;
  }

  .btn {
    min-height: 50px;
    padding-inline: 20px;
  }
}

@media (max-width: 760px) {
  :root {
    --container-padding: 16px;
  }

  body {
    font-size: 15.5px;
  }

  .section-title {
    max-width: 100%;
    margin-bottom: 14px;
    font-size: clamp(1.65rem, 1.35rem + 1vw, 2.15rem);
  }

  .eyebrow {
    margin-bottom: 14px;
    padding: 7px 12px;
    font-size: 0.74rem;
  }

  .btn {
    width: 100%;
    min-height: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}