/* ==========================================================================
   Megion KFT — style.css
   ========================================================================== */

:root {
  --navy: #0A1628;
  --navy-light: #1E3A5F;
  --navy-mid: #152236;
  --steel: #8B9BB4;
  --accent: #2563EB;
  --accent-hover: #1D4ED8;
  --white: #FFFFFF;
  --grey-light: #F4F6F9;
  --grey-text: #6B7280;
  --border: rgba(139, 155, 180, 0.2);

  --nav-height: 72px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

/* ===================== Reset ===================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font);
  font-weight: 400;
  line-height: 1.6;
  color: var(--white);
  background-color: var(--navy);
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

input,
textarea {
  font-family: inherit;
  font-size: 1rem;
}

/* ===================== Layout helpers ===================== */

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section__title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.section__title::after {
  content: "";
  display: block;
  width: 48px;
  height: 3px;
  margin: 16px auto 0;
  border-radius: 2px;
  background-color: var(--accent);
}

/* ===================== Buttons ===================== */

.btn {
  display: inline-block;
  padding: 14px 32px;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1;
  transition: background-color 0.3s ease, transform 0.3s ease;
}

.btn--primary {
  background-color: var(--accent);
  color: var(--white);
}

.btn--primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
}

/* ===================== Navigation ===================== */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background-color: rgba(10, 22, 40, 0.8);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background-color 0.3s ease;
}

.nav.scrolled {
  border-bottom-color: var(--border);
  background-color: rgba(10, 22, 40, 0.92);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav__logo img {
  height: 48px;
  width: auto;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav__link {
  font-size: 0.9375rem;
  font-weight: 400;
  color: var(--steel);
  transition: color 0.3s ease;
}

.nav__link:hover {
  color: var(--white);
}

/* Language toggle */

.nav__lang {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav__lang-divider {
  color: var(--steel);
  font-size: 0.8125rem;
  opacity: 0.5;
}

.lang-btn {
  padding: 5px 10px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: none;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--steel);
  transition: color 0.3s ease, border-color 0.3s ease;
}

.lang-btn:hover {
  color: var(--white);
}

.lang-btn--active {
  color: var(--white);
  border-color: var(--accent);
}

/* Hamburger (hidden on desktop) */

.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  border: none;
  background: none;
}

.nav__hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 1px;
  background-color: var(--white);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav__hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__hamburger.active span:nth-child(2) {
  opacity: 0;
}

.nav__hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===================== Hero ===================== */

.hero {
  display: flex;
  align-items: center;
  min-height: calc(100vh - var(--nav-height));
  background: linear-gradient(
    120deg,
    var(--navy) 0%,
    var(--navy-mid) 30%,
    var(--navy-light) 50%,
    var(--navy-mid) 70%,
    var(--navy) 100%
  );
  background-size: 300% 300%;
  animation: hero-gradient 16s ease infinite;
}

@keyframes hero-gradient {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.hero__content {
  text-align: center;
  padding-top: 40px;
  padding-bottom: 40px;
}

.hero__title {
  max-width: 760px;
  margin: 0 auto 24px;
  font-size: 3.25rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.hero__subtitle {
  max-width: 620px;
  margin: 0 auto 40px;
  font-size: 1.125rem;
  font-weight: 300;
  color: var(--steel);
}

/* ===================== About ===================== */

.about__text {
  max-width: 720px;
  margin: 0 auto 64px;
  text-align: center;
  font-size: 1.125rem;
  font-weight: 300;
  color: var(--steel);
}

.about__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.stat-box {
  padding: 40px 24px;
  text-align: center;
  background-color: var(--navy-mid);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.stat-box:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}

.stat-box__number {
  display: block;
  margin-bottom: 8px;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
}

.stat-box__label {
  font-size: 0.9375rem;
  color: var(--steel);
}

/* ===================== Cards (shared) ===================== */

.card {
  background-color: var(--navy-light);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}

/* ===================== Portfolio ===================== */

.portfolio__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 56px;
}

.portfolio-card {
  padding: 32px;
}

.portfolio-card__logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  margin-bottom: 20px;
  border-radius: 12px;
  background-color: var(--steel);
}

.portfolio-card__logo--empty {
  background-color: transparent;
  border: 1px dashed var(--steel);
}

.portfolio-card__logo-placeholder {
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
}

.portfolio-card__logo--empty .portfolio-card__logo-placeholder {
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--steel);
}

.portfolio-card__name {
  margin-bottom: 8px;
  font-size: 1.25rem;
  font-weight: 700;
}

.portfolio-card__desc {
  font-size: 0.9375rem;
  color: var(--steel);
}

.portfolio-card--placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  border-style: dashed;
}

.portfolio-card--placeholder .portfolio-card__logo {
  margin-bottom: 16px;
}

/* ===================== Team ===================== */

.team__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}

.team-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px 24px;
  text-align: center;
}

.team-card__avatar {
  width: 80px;
  height: 80px;
  margin-bottom: 20px;
  border-radius: 50%;
  background-color: var(--steel);
}

.team-card__name {
  margin-bottom: 4px;
  font-size: 1.125rem;
  font-weight: 600;
}

.team-card__title {
  font-size: 0.875rem;
  color: var(--steel);
}

/* ===================== Contact ===================== */

.contact__form {
  max-width: 560px;
  margin: 56px auto 0;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--steel);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  background-color: var(--navy-mid);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--white);
  transition: border-color 0.3s ease;
  resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--grey-text);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.contact__form .btn {
  width: 100%;
}

.form-error {
  margin-top: 6px;
  font-size: 0.8125rem;
  color: #EF4444;
}

.form-group input.input-error,
.form-group textarea.input-error {
  border-color: #EF4444;
}

.contact__success {
  max-width: 560px;
  margin: 56px auto 0;
  padding: 14px 16px;
  text-align: center;
  font-size: 0.9375rem;
  color: var(--white);
  background-color: rgba(37, 99, 235, 0.15);
  border: 1px solid var(--accent);
  border-radius: 8px;
}

/* ===================== Footer ===================== */

.footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.footer__copy {
  font-size: 0.875rem;
  color: var(--steel);
}

.footer__nav {
  display: flex;
  gap: 24px;
}

.footer__nav a {
  font-size: 0.875rem;
  color: var(--steel);
  transition: color 0.3s ease;
}

.footer__nav a:hover {
  color: var(--white);
}

/* ===================== Fade-in animation ===================== */

.fade-in {
  opacity: 0;
  transform: translateY(20px);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

/* Cards animate in via .fade-in, which would otherwise override the
   hover lift (equal specificity, later in file) — restore it here */
.card.fade-in.visible,
.stat-box.fade-in.visible {
  transition: opacity 0.6s ease, transform 0.3s ease, border-color 0.3s ease;
}

.card.fade-in.visible:hover,
.stat-box.fade-in.visible:hover {
  transform: translateY(-4px);
}

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

  .hero {
    animation: none;
  }

  .fade-in {
    opacity: 1;
    transform: none;
  }
}

/* ===================== Responsive (≤768px) ===================== */

@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }

  /* --- Mobile nav --- */

  .nav__hamburger {
    display: flex;
  }

  .nav__menu {
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    padding: 32px 24px;
    background-color: var(--navy);
    border-bottom: 1px solid var(--border);
    visibility: hidden;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
  }

  .nav__menu.open {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
  }

  .nav__list {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }

  .nav__link {
    font-size: 1.125rem;
  }

  /* --- Typography --- */

  .hero__title {
    font-size: 2.125rem;
  }

  .hero__subtitle {
    font-size: 1rem;
  }

  .section__title {
    font-size: 1.625rem;
  }

  /* --- Grids collapse --- */

  .about__stats,
  .portfolio__grid,
  .team__grid {
    grid-template-columns: 1fr;
  }

  .about__stats {
    gap: 16px;
  }

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

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }
}