@layer components;

@layer components {
  .site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    background: var(--header-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid transparent;
    transition: border-color var(--motion-base) ease, box-shadow var(--motion-base) ease;
  }

  .site-header.is-scrolled {
    border-color: var(--header-border);
    box-shadow: var(--shadow-sm);
  }

  .header__inner {
    min-height: var(--header-height);
    display: flex;
    align-items: center;
    gap: var(--space-5);
  }

  .brand {
    position: relative;
    display: inline-grid;
    place-items: center;
    flex-shrink: 0;
    width: 150px;
    height: 38px;
  }

  .logo {
    grid-area: 1 / 1;
    width: 150px;
    height: 38px;
    object-fit: contain;
    transition: opacity var(--motion-base) ease;
  }

  .logo--dark { display: var(--logo-dark-display); }
  .logo--light { display: var(--logo-light-display); }

  .site-nav {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    margin-left: auto;
  }

  .site-nav a {
    position: relative;
    display: inline-flex;
    align-items: center;
    min-height: var(--interactive-min);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: var(--font-size-small);
    font-weight: 500;
    white-space: nowrap;
    transition: color var(--motion-base) ease, background var(--motion-base) ease;
  }

  .site-nav a:hover,
  .site-nav a:focus-visible {
    color: var(--text-primary);
    background: var(--surface-hover);
  }

  .header__actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-left: var(--space-4);
    flex-shrink: 0;
  }

  .nav-toggle,
  .theme-toggle,
  .btn {
    min-width: var(--interactive-min);
    min-height: var(--interactive-min);
  }

  .nav-toggle,
  .theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-default);
    background: var(--surface-primary);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: border-color var(--motion-base) ease, background var(--motion-base) ease;
  }

  .nav-toggle:hover,
  .theme-toggle:hover {
    border-color: var(--border-strong);
    background: var(--surface-hover);
  }

  .whatsapp-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: var(--interactive-min);
    min-height: var(--interactive-min);
    border: 1px solid var(--border-default);
    background: var(--surface-primary);
    color: #25D366;
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: border-color var(--motion-base) ease, background var(--motion-base) ease;
  }

  .whatsapp-icon:hover {
    border-color: #25D366;
    background: var(--surface-hover);
  }

  .nav-toggle {
    display: none;
  }

  .theme-toggle__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
  }

  [data-theme="dark"] .theme-toggle__icon--sun { display: inline-flex; }
  [data-theme="dark"] .theme-toggle__icon--moon { display: none; }
  [data-theme="light"] .theme-toggle__icon--sun { display: none; }
  [data-theme="light"] .theme-toggle__icon--moon { display: inline-flex; }

  .btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 1.125rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    font-size: var(--font-size-small);
    font-weight: 600;
    line-height: 1;
    white-space: nowrap;
    cursor: pointer;
    transition: all var(--motion-base) var(--ease-out);
  }

  .btn--ghost {
    color: var(--text-primary);
    border-color: var(--border-default);
    background: var(--surface-primary);
  }

  .btn--ghost:hover,
  .btn--ghost:focus-visible {
    border-color: var(--border-strong);
    background: var(--surface-hover);
  }

  .btn--primary {
    color: #ffffff;
    background: var(--brand-gradient);
    border: none;
    box-shadow: var(--shadow-sm);
  }

  .btn--primary:hover,
  .btn--primary:focus-visible {
    opacity: 0.9;
    box-shadow: var(--shadow-md), var(--shadow-glow);
    transform: translateY(-1px);
  }

  .btn--lg {
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-body);
    border-radius: var(--radius-lg);
  }

  @media (max-width: 980px) {
    .header__inner {
      gap: var(--space-3);
    }

    .nav-toggle {
      display: inline-flex;
      order: -1;
    }

    .site-nav {
      position: fixed;
      top: calc(var(--header-height) + 0.5rem);
      left: var(--container-padding);
      right: var(--container-padding);
      flex-direction: column;
      align-items: stretch;
      gap: var(--space-1);
      padding: var(--space-3);
      border-radius: var(--radius-lg);
      border: 1px solid var(--header-border);
      background: rgba(10, 10, 15, 0.97);
      backdrop-filter: blur(24px) saturate(180%);
      -webkit-backdrop-filter: blur(24px) saturate(180%);
      box-shadow: var(--shadow-xl);
      opacity: 0;
      transform: translateY(-8px);
      pointer-events: none;
      transition: opacity var(--motion-base) var(--ease-out), transform var(--motion-base) var(--ease-out);
      margin-left: 0;
      z-index: var(--z-overlay);
    }

    .site-header:has(.nav-toggle[aria-expanded="true"]) .site-nav {
      opacity: 1;
      transform: translateY(0);
      pointer-events: auto;
    }

    .site-nav a {
      width: 100%;
      padding: 0.75rem 1rem;
    }

    .header__actions {
      margin-left: auto;
    }

    .nav-register {
      margin-top: var(--space-2);
      justify-content: center;
    }
  }

  @media (max-width: 767px) {
    .brand, .logo {
      width: 130px;
      height: 34px;
    }

    .header__actions .btn--primary {
      padding-inline: 0.75rem;
      font-size: var(--font-size-xs);
    }
  }

  @media (prefers-reduced-motion: reduce) {
    .site-header,
    .site-nav,
    .btn,
    .theme-toggle,
    .nav-toggle {
      transition: none;
    }

    .btn--primary:hover {
      transform: none;
    }
  }
}