/* ==========================================
   OMSU VPN — Landing Page Styles
   Dark theme, #0a0a0a background, #00ffcc accent
   ========================================== */

/* --- Reset & Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: #0a0a0a;
  color: #e0e0e0;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: #00ffcc;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border: 2px solid #00ffcc;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.25s, color 0.25s, transform 0.15s;
  text-align: center;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn--header {
  background: transparent;
  color: #00ffcc;
}

.btn--header:hover {
  background: #00ffcc;
  color: #0a0a0a;
}

.btn--hero {
  background: #00ffcc;
  color: #0a0a0a;
  border-color: #00ffcc;
  font-size: 1.1rem;
  padding: 14px 36px;
}

.btn--hero:hover {
  background: transparent;
  color: #00ffcc;
}

.btn--tariff {
  background: transparent;
  color: #00ffcc;
  width: 100%;
}

.btn--tariff:hover {
  background: #00ffcc;
  color: #0a0a0a;
}

/* --- Header --- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 255, 204, 0.12);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.header__logo {
  font-size: 1.35rem;
  font-weight: 700;
  color: #00ffcc;
  letter-spacing: 2px;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.header__link {
  font-size: 0.9rem;
  color: #b0b0b0;
  transition: color 0.2s;
}

.header__link:hover {
  color: #00ffcc;
  text-decoration: none;
}

/* --- Hero --- */
.hero {
  text-align: center;
  padding: 100px 20px 80px;
}

.hero__title {
  font-size: 3rem;
  font-weight: 800;
  color: #00ffcc;
  letter-spacing: 4px;
  margin-bottom: 8px;
}

.hero__subtitle {
  font-size: 1.2rem;
  color: #888;
  margin-bottom: 36px;
}

/* --- Sections --- */
.section {
  padding: 80px 0;
}

.section--alt {
  background: #0d0d0d;
}

.section__title {
  font-size: 2rem;
  font-weight: 700;
  color: #fff;
  text-align: center;
  margin-bottom: 48px;
  position: relative;
}

.section__title::after {
  content: "";
  display: block;
  width: 50px;
  height: 3px;
  background: #00ffcc;
  margin: 16px auto 0;
  border-radius: 2px;
}

/* --- Advantages --- */
.advantages {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
}

.advantage-card {
  text-align: center;
  padding: 28px 16px;
  border: 1px solid rgba(0, 255, 204, 0.1);
  border-radius: 10px;
  transition: border-color 0.25s, transform 0.25s;
}

.advantage-card:hover {
  border-color: rgba(0, 255, 204, 0.35);
  transform: translateY(-3px);
}

.advantage-card__icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.advantage-card__title {
  font-size: 1.05rem;
  color: #fff;
  margin-bottom: 8px;
}

.advantage-card__text {
  font-size: 0.9rem;
  color: #999;
}

/* --- Tariffs --- */
.tariffs {
  display: flex;
  gap: 32px;
  justify-content: center;
  flex-wrap: wrap;
}

.tariff-card {
  flex: 0 1 320px;
  border: 1px solid rgba(0, 255, 204, 0.2);
  border-radius: 12px;
  padding: 36px 28px;
  text-align: center;
  position: relative;
  transition: border-color 0.25s, transform 0.25s;
}

.tariff-card:hover {
  border-color: #00ffcc;
  transform: translateY(-4px);
}

.tariff-card--featured {
  border-color: #00ffcc;
  box-shadow: 0 0 30px rgba(0, 255, 204, 0.08);
}

.tariff-card__badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: #00ffcc;
  color: #0a0a0a;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 18px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.tariff-card__name {
  font-size: 1.25rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 8px;
}

.tariff-card__price {
  font-size: 2.8rem;
  font-weight: 800;
  color: #00ffcc;
  margin-bottom: 12px;
}

.tariff-card__desc {
  font-size: 0.9rem;
  color: #888;
  margin-bottom: 24px;
}

/* --- Steps --- */
.steps {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 600px;
  margin: 0 auto;
}

.step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.step__number {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border: 2px solid #00ffcc;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  color: #00ffcc;
}

.step__title {
  font-size: 1.1rem;
  color: #fff;
  margin-bottom: 4px;
}

.step__text {
  font-size: 0.9rem;
  color: #999;
}

/* --- Accordion --- */
.accordion {
  max-width: 800px;
  margin: 0 auto;
}

.accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: transparent;
  border: 1px solid rgba(0, 255, 204, 0.25);
  border-radius: 8px;
  padding: 16px 24px;
  color: #00ffcc;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.accordion__trigger:hover {
  background: rgba(0, 255, 204, 0.05);
}

.accordion__arrow {
  font-size: 0.7rem;
  transition: transform 0.3s;
}

.accordion__arrow--open {
  transform: rotate(180deg);
}

.accordion__panel {
  margin-top: 16px;
  border: 1px solid rgba(0, 255, 204, 0.1);
  border-radius: 8px;
  overflow: hidden;
}

.accordion__content {
  padding: 28px 24px;
  max-height: 500px;
  overflow-y: auto;
  font-size: 0.85rem;
  line-height: 1.7;
  color: #b0b0b0;
}

.accordion__content h3 {
  font-size: 1.05rem;
  color: #fff;
  margin: 24px 0 8px;
}

.accordion__content h3:first-child {
  margin-top: 0;
}

.accordion__content h4 {
  font-size: 0.95rem;
  color: #ccc;
  margin: 20px 0 6px;
}

.accordion__content p {
  margin-bottom: 8px;
}

.accordion__content ul {
  margin: 8px 0 8px 24px;
}

.accordion__content li {
  margin-bottom: 4px;
}

/* --- Footer --- */
.footer {
  border-top: 1px solid rgba(0, 255, 204, 0.12);
  padding: 40px 0;
  font-size: 0.85rem;
  color: #777;
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  flex-wrap: wrap;
}

.footer__name {
  font-size: 1.1rem;
  font-weight: 700;
  color: #00ffcc;
  margin-bottom: 6px;
}

.footer__col p {
  margin-bottom: 4px;
}

.footer__link {
  font-weight: 600;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .header__nav {
    gap: 14px;
  }

  .header__link:not(.btn--header) {
    display: none;
  }

  .hero__title {
    font-size: 2rem;
  }

  .section {
    padding: 56px 0;
  }

  .section__title {
    font-size: 1.5rem;
  }

  .tariffs {
    flex-direction: column;
    align-items: center;
  }

  .tariff-card {
    width: 100%;
    max-width: 360px;
  }

  .footer__inner {
    flex-direction: column;
    gap: 20px;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 60px 20px 50px;
  }

  .hero__title {
    font-size: 1.6rem;
    letter-spacing: 2px;
  }

  .hero__subtitle {
    font-size: 1rem;
  }

  .advantages {
    grid-template-columns: 1fr;
  }
}