/*
Theme Name: Kata Telecom Landing
Theme URI: https://katatelecom.ru
Description: Корпоративный B2B-лендинг katatelecom.ru
Version: 1.0
Author: Kata Telecom
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: katatelecom-landing
*/

/* --- Variables (B2B SaaS / Enterprise) --- */
:root {
  --kt-primary: #1F3A5F;
  --kt-secondary: #4A6FA5;
  --kt-accent: #6B9AC4;
  --kt-accent-hover: #5a8ab8;
  --kt-text: #1E1E1E;
  --kt-text-muted: #5a6578;
  --kt-bg: #F7F9FC;
  --kt-surface: #ffffff;
  --kt-border: #e4e9f0;
  --kt-success: #0d9488;
  --kt-radius: 12px;
  --kt-radius-sm: 8px;
  --kt-shadow: 0 2px 8px rgba(31, 58, 95, 0.06);
  --kt-shadow-hover: 0 8px 24px rgba(31, 58, 95, 0.1);
  --kt-font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--kt-font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--kt-text);
  background: var(--kt-bg);
}

/* --- Layout --- */
.kt-landing {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.kt-landing main {
  flex: 1;
}

.kt-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

@media (min-width: 768px) {
  .kt-container {
    padding: 0 2rem;
  }
}

/* --- Site header (service link) --- */
.kt-site-header {
  padding: 0.75rem 0;
  background: var(--kt-surface);
  border-bottom: 1px solid var(--kt-border);
}

.kt-site-header__inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  justify-content: flex-end;
}

@media (min-width: 768px) {
  .kt-site-header__inner {
    padding: 0 2rem;
  }
}

.kt-site-header__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--kt-text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.kt-site-header__link:hover {
  color: var(--kt-secondary);
}

/* --- Buttons --- */
.kt-btn {
  display: inline-block;
  padding: 0.65rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  text-align: center;
  text-decoration: none;
  border: none;
  border-radius: var(--kt-radius-sm);
  cursor: pointer;
  transition: background 0.2s ease, transform 0.05s ease;
}

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

.kt-btn--primary:hover {
  background: var(--kt-accent-hover);
}

.kt-btn--lg {
  padding: 0.85rem 2rem;
  font-size: 1.0625rem;
}

.kt-btn:active {
  transform: scale(0.98);
}

/* --- Section common --- */
.kt-section {
  padding: 4rem 0;
  background: var(--kt-surface);
}

.kt-section:nth-of-type(even) {
  background: var(--kt-bg);
}

.kt-section__title {
  margin: 0 0 2rem;
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--kt-primary);
  letter-spacing: -0.02em;
  line-height: 1.3;
}

@media (min-width: 768px) {
  .kt-section__title {
    font-size: 2rem;
    margin-bottom: 2.5rem;
  }
}

/* --- 1. Hero --- */
.kt-hero {
  position: relative;
  padding: 5rem 0 5.5rem;
  text-align: center;
  overflow: hidden;
}

.kt-hero__bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(165deg, var(--kt-primary) 0%, var(--kt-secondary) 100%);
  z-index: 0;
}

.kt-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 40% at 50% -10%, rgba(107, 154, 196, 0.25), transparent);
  pointer-events: none;
}

.kt-hero .kt-container {
  position: relative;
  z-index: 1;
}

.kt-hero__title {
  margin: 0 0 1rem;
  font-size: 1.875rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.kt-hero__subtitle {
  margin: 0 0 1.5rem;
  font-size: 1.125rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.92);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.kt-hero__text {
  margin: 0 0 2rem;
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.85);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.65;
}

.kt-hero__cta {
  margin: 0;
}

.kt-hero .kt-btn--primary {
  background: #fff;
  color: var(--kt-primary);
}

.kt-hero .kt-btn--primary:hover {
  background: rgba(255, 255, 255, 0.95);
  color: var(--kt-primary);
}

@media (min-width: 768px) {
  .kt-hero {
    padding: 6.5rem 0 7rem;
  }

  .kt-hero__title {
    font-size: 2.5rem;
  }

  .kt-hero__subtitle {
    font-size: 1.25rem;
  }
}

/* --- 2. О платформе (карточки) --- */
.kt-cards {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .kt-cards {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.75rem;
  }
}

.kt-card {
  background: var(--kt-surface);
  border: 1px solid var(--kt-border);
  border-radius: var(--kt-radius);
  padding: 2rem;
  box-shadow: var(--kt-shadow);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.kt-card:hover {
  box-shadow: var(--kt-shadow-hover);
  border-color: rgba(74, 111, 165, 0.25);
}

.kt-card__num {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--kt-accent);
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.kt-card__title {
  margin: 0 0 0.75rem;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--kt-primary);
  line-height: 1.3;
}

.kt-card__text {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--kt-text-muted);
  line-height: 1.6;
}

/* --- 3. Как это работает (шаги) --- */
.kt-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2rem;
}

@media (min-width: 640px) {
  .kt-steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
  }
}

.kt-step {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
}

.kt-step__num {
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--kt-accent);
  background: rgba(107, 154, 196, 0.12);
  border-radius: 50%;
}

.kt-step__content {
  flex: 1;
}

.kt-step__title {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--kt-primary);
}

.kt-step__text {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--kt-text-muted);
  line-height: 1.55;
}

/* --- 4. Сценарии использования --- */
.kt-use-cases__grid {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1rem;
}

@media (min-width: 640px) {
  .kt-use-cases__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
  }
}

.kt-use-case {
  padding: 1.25rem 1.5rem;
  background: var(--kt-surface);
  border: 1px solid var(--kt-border);
  border-radius: var(--kt-radius-sm);
  font-size: 1rem;
  font-weight: 500;
  color: var(--kt-primary);
  box-shadow: var(--kt-shadow);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.kt-use-case:hover {
  border-color: rgba(107, 154, 196, 0.3);
  box-shadow: var(--kt-shadow-hover);
}

/* --- 5. Почему нас выбирают --- */
.kt-why__list {
  margin: 0;
  padding: 0;
  list-style: none;
  max-width: 560px;
}

.kt-why__list li {
  position: relative;
  padding-left: 1.75rem;
  margin-bottom: 1rem;
  font-size: 1rem;
  color: var(--kt-text);
  line-height: 1.6;
}

.kt-why__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5rem;
  width: 8px;
  height: 8px;
  background: var(--kt-accent);
  border-radius: 50%;
}

.kt-why__list li:last-child {
  margin-bottom: 0;
}

/* --- 6. Доверие и соответствие --- */
.kt-trust__text {
  margin: 0 0 2rem;
  font-size: 1rem;
  color: var(--kt-text-muted);
  line-height: 1.7;
  max-width: 640px;
}

.kt-trust__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
}

.kt-trust__links a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--kt-accent);
  text-decoration: none;
}

.kt-trust__links a:hover {
  text-decoration: underline;
}

/* --- 7. CTA + форма --- */
.kt-cta .kt-section__title {
  margin-bottom: 1rem;
}

.kt-cta__title {
  margin: 0 0 0.75rem;
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--kt-primary);
  letter-spacing: -0.02em;
}

.kt-cta__text {
  margin: 0 0 2rem;
  font-size: 1rem;
  color: var(--kt-text-muted);
  line-height: 1.6;
}

.kt-cta__btn-wrap {
  margin: 0 0 3rem;
}

.kt-contact-block {
  display: grid;
  gap: 2rem;
  padding: 2.5rem;
  background: var(--kt-bg);
  border: 1px solid var(--kt-border);
  border-radius: var(--kt-radius);
  box-shadow: var(--kt-shadow);
}

@media (min-width: 640px) {
  .kt-contact-block {
    grid-template-columns: 200px 1fr;
    align-items: start;
  }
}

.kt-contact-block__label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--kt-text-muted);
  margin-bottom: 0.35rem;
}

.kt-contact-block__link {
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--kt-accent);
  text-decoration: none;
}

.kt-contact-block__link:hover {
  text-decoration: underline;
}

.kt-form-wrap {
  min-width: 0;
}

.kt-form__success {
  margin: 0 0 1rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--kt-success);
}

.kt-form__row {
  margin-bottom: 1.25rem;
}

.kt-form__row label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--kt-text);
}

.kt-form__row input,
.kt-form__row textarea {
  width: 100%;
  max-width: 400px;
  padding: 0.65rem 1rem;
  font-size: 1rem;
  font-family: inherit;
  border: 1px solid var(--kt-border);
  border-radius: var(--kt-radius-sm);
  background: var(--kt-surface);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.kt-form__row textarea {
  min-height: 120px;
  resize: vertical;
}

.kt-form__row input::placeholder,
.kt-form__row textarea::placeholder {
  color: var(--kt-text-muted);
  opacity: 0.8;
}

.kt-form__row input:focus,
.kt-form__row textarea:focus {
  outline: none;
  border-color: var(--kt-accent);
  box-shadow: 0 0 0 3px rgba(107, 154, 196, 0.15);
}

.kt-form .kt-btn {
  margin-top: 0.25rem;
}

/* --- 8. Footer --- */
.kt-footer {
  padding: 2.5rem 0;
  background: var(--kt-primary);
  color: rgba(255, 255, 255, 0.85);
}

.kt-footer__top {
  margin-bottom: 1.5rem;
}

.kt-footer__brand {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
}

.kt-footer__email {
  margin: 0;
  font-size: 0.9375rem;
}

.kt-footer__email a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
}

.kt-footer__email a:hover {
  text-decoration: underline;
}

.kt-footer__bottom {
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.kt-footer__copy {
  margin: 0;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.7);
}

.kt-footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
}

.kt-footer__nav a {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
}

.kt-footer__nav a:hover {
  color: #fff;
}